Arsenic: A shiny gray element with atomic symbol As, atomic number 33, and atomic weight 75. It occurs throughout the universe, mostly in the form of metallic arsenides. Most forms are toxic. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), arsenic and certain arsenic compounds have been listed as known carcinogens. (From Merck Index, 11th ed)Arsenic Poisoning: Disorders associated with acute or chronic exposure to compounds containing ARSENIC (ARSENICALS) which may be fatal. Acute oral ingestion is associated with gastrointestinal symptoms and an encephalopathy which may manifest as SEIZURES, mental status changes, and COMA. Chronic exposure is associated with mucosal irritation, desquamating rash, myalgias, peripheral neuropathy, and white transverse (Mees) lines in the fingernails. (Adams et al., Principles of Neurology, 6th ed, p1212)Arsenicals: Inorganic or organic compounds that contain arsenic.Oxides: Binary compounds of oxygen containing the anion O(2-). The anion combines with metals to form alkaline oxides and non-metals to form acidic oxides.Water Pollutants, Chemical: Chemical compounds which pollute the water of rivers, streams, lakes, the sea, reservoirs, or other bodies of water.Cacodylic Acid: An arsenical that has been used as a dermatologic agent and as an herbicide.Arsenites: Inorganic salts or organic esters of arsenious acid.Arsenates: Inorganic or organic salts and esters of arsenic acid.Drinking Water: Water that is intended to be ingested.Sodium Compounds: Inorganic compounds that contain sodium as an integral part of the molecule.Water Supply: Means or process of supplying water (as for a community) usually including reservoirs, tunnels, and pipelines and often the watershed from which the water is ultimately drawn. (Webster, 3d ed)BangladeshNails: The thin, horny plates that cover the dorsal surfaces of the distal phalanges of the fingers and toes of primates.Environmental Exposure: The exposure to potentially harmful chemical, physical, or biological agents in the environment or to environmental factors that may include ionizing radiation, pathogenic organisms, or toxic chemicals.Water Pollution, Chemical: Adverse effect upon bodies of water (LAKES; RIVERS; seas; groundwater etc.) caused by CHEMICAL WATER POLLUTANTS.Water Wells: Constructions built to access underground water.Soil Pollutants: Substances which pollute the soil. Use for soil pollutants in general or for which there is no specific heading.New HampshireEnvironmental Monitoring: The monitoring of the level of toxins, chemical pollutants, microbial contaminants, or other harmful substances in the environment (soil, air, and water), workplace, or in the bodies of people and animals present in that environment.Water Pollutants: Substances or organisms which pollute the water or bodies of water. Use for water pollutants in general or those for which there is no specific heading.Groundwater: Liquid water present beneath the surface of the earth.Skin DiseasesRoxarsone: An arsenic derivative which has anticoccidial action and promotes growth in animals.Spectrophotometry, Atomic: Spectrophotometric techniques by which the absorption or emmision spectra of radiation from atoms are produced and analyzed.Pteris: A plant genus of the family PTERIDACEAE. Members contain entkaurane DITERPENES. The name is similar to bracken fern (PTERIDIUM).Arsenate Reductases: Oxidoreductases that specifically reduce arsenate ion to arsenite ion. Reduction of arsenate is a critical step for its biotransformation into a form that can be transported by ARSENITE TRANSPORTING ATPASES or complexed by specific sulfhydryl-containing proteins for the purpose of detoxification (METABOLIC DETOXIFICATION, DRUG). Arsenate reductases require reducing equivalents such as GLUTAREDOXIN or AZURIN.Food Contamination: The presence in food of harmful, unpalatable, or otherwise objectionable foreign substances, e.g. chemicals, microorganisms or diluents, before, during, or after processing or storage.Antimony: A metallic element that has the atomic symbol Sb, atomic number 51, and atomic weight 121.75. It is used as a metal alloy and as medicinal and poisonous salts. It is toxic and an irritant to the skin and the mucous membranes.Ion Pumps: A general class of integral membrane proteins that transport ions across a membrane against an electrochemical gradient.Arsenite Transporting ATPases: Efflux pumps that use the energy of ATP hydrolysis to pump arsenite across a membrane. They are primarily found in prokaryotic organisms, where they play a role in protection against excess intracellular levels of arsenite ions.Environmental Pollutants: Substances or energies, for example heat or light, which when introduced into the air, water, or land threaten life or health of individuals or ECOSYSTEMS.Metallurgy: The science, art, or technology dealing with processes involved in the separation of metals from their ores, the technique of making or compounding the alloys, the techniques of working or heat-treating metals, and the mining of metals. It includes industrial metallurgy as well as metallurgical techniques employed in the preparation and working of metals used in dentistry, with special reference to orthodontic and prosthodontic appliances. (From Jablonski, Dictionary of Dentistry, 1992, p494)MiningMetals, Heavy: Metals with high specific gravity, typically larger than 5. They have complex spectra, form colored salts and double salts, have a low electrode potential, are mainly amphoteric, yield weak bases and weak acids, and are oxidizing or reducing agents (From Grant & Hackh's Chemical Dictionary, 5th ed)ChileCarcinogens, Environmental: Carcinogenic substances that are found in the environment.Aquaglyceroporins: A subgroup of aquaporins that transport WATER; GLYCEROL; and other small solutes across CELL MEMBRANES.Hair: A filament-like structure consisting of a shaft which projects to the surface of the SKIN from a root which is softer than the shaft and lodges in the cavity of a HAIR FOLLICLE. It is found on most surfaces of the body.Methylation: Addition of methyl groups. In histo-chemistry methylation is used to esterify carboxyl groups and remove sulfate groups by treating tissue sections with hot methanol in the presence of hydrochloric acid. (From Stedman, 25th ed)Hazardous Waste: Waste products which threaten life, health, or the environment when improperly treated, stored, transported, disposed of, or otherwise managed.United States Environmental Protection Agency: An agency in the Executive Branch of the Federal Government. It was created as an independent regulatory agency responsible for the implementation of federal laws designed to protect the environment. Its mission is to protect human health and the ENVIRONMENT.Hazardous Waste Sites: Sites where HAZARDOUS SUBSTANCES are deposited. Some have facilities for safely storing, processing, and recycling these waste products.Garlic: One of the Liliaceae used as a spice (SPICES) and traditional remedy. It contains alliin lyase and alliin, which is converted by alliin lyase to allicin, the pungent ingredient responsible for the aroma of fresh cut garlic.Allyl CompoundsSulfinic Acids: Any of the monobasic inorganic or organic acids of sulfur with the general formula RSO(OH). (From McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)Rivers: Large natural streams of FRESH WATER formed by converging tributaries and which empty into a body of water (lake or ocean).Water: A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Television: The transmission and reproduction of transient images of fixed or moving objects. An electronic system of transmitting such images together with sound over a wire or through space by apparatus that converts light and sound into electrical waves and reconverts them into visible light rays and audible sound. (From Webster, 3rd ed)Seasons: Divisions of the year according to some regularly recurrent phenomena usually astronomical or climatic. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Access to Information: Individual's rights to obtain and use information collected or generated by others.Gastroenterology: A subspecialty of internal medicine concerned with the study of the physiology and diseases of the digestive system and related structures (esophagus, liver, gallbladder, and pancreas).Pancreatitis: INFLAMMATION of the PANCREAS. Pancreatitis is classified as acute unless there are computed tomographic or endoscopic retrograde cholangiopancreatographic findings of CHRONIC PANCREATITIS (International Symposium on Acute Pancreatitis, Atlanta, 1992). The two most common forms of acute pancreatitis are ALCOHOLIC PANCREATITIS and gallstone pancreatitis.Journal Impact Factor: A quantitative measure of the frequency on average with which articles in a journal have been cited in a given period of time.Periodicals as Topic: A publication issued at stated, more or less regular, intervals.Peer Review, Research: The evaluation by experts of the quality and pertinence of research or research proposals of other experts in the same field. Peer review is used by editors in deciding which submissions warrant publication, by granting agencies to determine which proposals should be funded, and by academic institutions in tenure decisions.

Arsenic targets tubulins to induce apoptosis in myeloid leukemia cells. (1/1444)

Arsenic exhibits a differential toxicity to cancer cells. At a high concentration (>5 microM), As2O3 causes acute necrosis in various cell lines. At a lower concentration (0.5-5 microm), it induces myeloid cell maturation and an arrest in metaphase, leading to apoptosis. As2O3-treated cells have features found with both tubulin-assembling enhancers (Taxol) and inhibitors (colchicine). Prior treatment of monomeric tubulin with As2O3 markedly inhibits GTP-induced polymerization and microtubule formation in vitro but does not destabilize GTP-induced tubulin polymers. Cross-inhibition experiments indicate that As2O3 is a noncompetitive inhibitor of GTP binding to tubulin. These observations correlate with the three-dimensional structure of beta-tubulin and suggest that the cross-linking of two vicinal cysteine residues (Cys-12 and Cys-213) by trivalent arsenic inactivates the GTP binding site. Furthermore, exogenous GTP can prevent As2O3-induced mitotic arrest.  (+info)

High concentrations of heavy metals in neighborhoods near ore smelters in northern Mexico. (2/1444)

In developing countries, rapid industrialization without environmental controls has resulted in heavy metal contamination of communities. We hypothesized that residential neighborhoods located near ore industries in three northern Mexican cities would be heavily polluted with multiple contaminants (arsenic, cadmium, and lead) and that these sites would be point sources for the heavy metals. To evaluate these hypotheses, we obtained samples of roadside surface dust from residential neighborhoods within 2 m of metal smelters [Torreon (n = 19)] and Chihuahua (n = 19)] and a metal refinery [Monterrey (n = 23)]. Heavy metal concentrations in dust were mapped with respect to distance from the industrial sites. Correlation between dust metal concentration and distance was estimated with least-squares regression using log-transformed data. Median dust arsenic, cadmium, and lead concentrations were 32, 10, and 277 microg/g, respectively, in Chihuahua; 42, 2, and 467 microg/g, respectively, in Monterrey, and 113, 112, and 2,448 microg/g, respectively, in Torreon. Dust concentrations of all heavy metals were significantly higher around the active smelter in Torreon, where more than 90% of samples exceeded Superfund cleanup goals. At all sites, dust concentrations were inversely related to distance from the industrial source, implicating these industries as the likely source of the contamination. We concluded that residential neighborhoods around metal smelting and refining sites in these three cities are contaminated by heavy metals at concentrations likely to pose a health threat to people living nearby. Evaluations of human exposure near these sites should be conducted. Because multiple heavy metal pollutants may exist near smelter sites, researchers should avoid attributing toxicity to one heavy metal unless others have been measured and shown not to coexist.  (+info)

Retinoic acid and arsenic synergize to eradicate leukemic cells in a mouse model of acute promyelocytic leukemia. (3/1444)

In acute promyelocytic leukemia (APL) patients, retinoic acid (RA) triggers differentiation while arsenic trioxide (arsenic) induces both a partial differentiation and apoptosis. Although their mechanisms of action are believed to be distinct, these two drugs both induce the catabolism of the oncogenic promyelocytic leukemia (PML)/RARalpha fusion protein. While APL cell lines resistant to one agent are sensitive to the other, the benefit of combining RA and arsenic in cell culture is controversial, and thus far, no data are available in patients. Using syngenic grafts of leukemic blasts from PML/RARalpha transgenic mice as a model for APL, we demonstrate that arsenic induces apoptosis and modest differentiation, and prolongs mouse survival. Furthermore, combining arsenic with RA accelerates tumor regression through enhanced differentiation and apoptosis. Although RA or arsenic alone only prolongs survival two- to threefold, associating the two drugs leads to tumor clearance after a 9-mo relapse-free period. These studies establishing RA/arsenic synergy in vivo prompt the use of combined arsenic/RA treatments in APL patients and exemplify how mouse models of human leukemia can be used to design or optimize therapies.  (+info)

Interference in the quantitation of methylated arsenic species in human urine. (4/1444)

The aim of this paper is to report on the presence of chemical interferences in the quantitation of methylated arsenic species in human urine when using a method based on selective volatile arsine species generation, chromatographic separation, and hydride generation atomic absorption spectrometry (HGAAS) detection. An abnormal profile of methylated arsenic species characterized by the absence of the peak corresponding to dimethylarsinic acid (DMA) was observed in urine from some individuals exposed to arsenic via drinking water and living in rural communities of northwestern Argentina. The absence of this peak persisted even after the addition of known amounts of DMA to the samples. However, the DMA peak appeared after urine digestion with hydrochloric acid (2M). Samples showing interferences were provided by individuals who had mate consumption and coca-leaf chewing habits. Because the relative proportions of methylated arsenic species present in urine have been used to evaluate the efficiency of the methylation process, interferences in the formation or detection of methylarsines may cause underestimation of As exposure and also lead to erroneous conclusions about relative biomethylation efficiencies. Therefore, we recommend that urine samples should be digested with 2M HCl before performing speciation analysis using HGAA techniques. Further studies on the impact of this type of interferences on other arsenic speciation methods are also required.  (+info)

Drinking water arsenic in Utah: A cohort mortality study. (5/1444)

The association of drinking water arsenic and mortality outcome was investigated in a cohort of residents from Millard County, Utah. Median drinking water arsenic concentrations for selected study towns ranged from 14 to 166 ppb and were from public and private samples collected and analyzed under the auspices of the State of Utah Department of Environmental Quality, Division of Drinking Water. Cohort members were assembled using historical documents of the Church of Jesus Christ of Latter-day Saints. Standard mortality ratios (SMRs) were calculated. Using residence history and median drinking water arsenic concentration, a matrix for cumulative arsenic exposure was created. Without regard to specific exposure levels, statistically significant findings include increased mortality from hypertensive heart disease [SMR = 2.20; 95% confidence interval (CI), 1.36-3.36], nephritis and nephrosis (SMR = 1.72; CI, 1.13-2.50), and prostate cancer (SMR = 1.45; CI, 1.07-1. 91) among cohort males. Among cohort females, statistically significant increased mortality was found for hypertensive heart disease (SMR = 1.73; CI, 1.11-2.58) and for the category of all other heart disease, which includes pulmonary heart disease, pericarditis, and other diseases of the pericardium (SMR = 1.43; CI, 1.11-1.80). SMR analysis by low, medium, and high arsenic exposure groups hinted at a dose relationship for prostate cancer. Although the SMRs by exposure category were elevated for hypertensive heart disease for both males and females, the increases were not sequential from low to high groups. Because the relationship between health effects and exposure to drinking water arsenic is not well established in U.S. populations, further evaluation of effects in low-exposure populations is warranted.  (+info)

Mutational spectrum of p53 gene in arsenic-related skin cancers from the blackfoot disease endemic area of Taiwan. (6/1444)

To understand the role of p53 tumour suppressor gene in the carcinogenesis of arsenic-related skin cancers from the blackfoot disease endemic area of Taiwan, we collected tumour samples from 23 patients with Bowen's disease, seven patients with basal cell carcinomas (BCC) and nine patients with squamous cell carcinomas (SCC). The result showed that p53 gene mutations were found in 39% of cases with Bowen's disease (9/23), 28.6% of cases with BCC (2/7) and 55.6% of cases with SCC (5/9). Most of the mutation sites were located on exon 5 and exon 8. Moreover, the results from direct sequencing indicated that missense mutations were found at codon 149 (C-->T) in one case, codon 175 (G-->A) in three cases, codon 273 (G-->C) in three cases, codon 292 (T-->A) in one case, codon 283 (G-->T) in one case, codon 172 (T-->C) in one case and codon 284 (C-->A) in one case. In addition, silent mutations were also found in four cases. These mutations were located at codons 174, 253, 289 and 298 respectively. In immunohistochemistry analysis, p53 overexpression was found in 43.5% (10/23) of cases with Bowen's disease, 14% (1/7) of cases with BCC and 44% (4/9) of cases with SSC. These findings showed that p53 gene mutation rate in arsenic-related skin cancers from the blackfoot disease endemic area of Taiwan is high and that the mutation types are different from those in UV-induced skin cancers.  (+info)

The enigma of arsenic carcinogenesis: role of metabolism. (7/1444)

Inorganic arsenic is considered a high-priority hazard, particularly because of its potential to be a human carcinogen. In exposed human populations, arsenic is associated with tumors of the lung, skin, bladder, and liver. While it is known to be a human carcinogen, carcinogenesis in laboratory animals by this metalloid has never been convincingly demonstrated. Therefore, no animal models exist for studying molecular mechanisms of arsenic carcinogenesis. The apparent human sensitivity, combined with our incomplete understanding about mechanisms of carcinogenic action, create important public health concerns and challenges in risk assessment, which could be met by understanding the role of metabolism in arsenic toxicity and carcinogenesis. This symposium summary covers three critical major areas involving arsenic metabolism: its biodiversity, the role of arsenic metabolism in molecular mechanisms of carcinogenesis, and the impact of arsenic metabolism on human risk assessment. In mammals, arsenic is metabolized to mono- and dimethylated species by methyltransferase enzymes in reactions that require S-adenosyl-methionine (SAM) as the methyl donating cofactor. A remarkable species diversity in arsenic methyltransferase activity may account for the wide variability in sensitivity of humans and animals to arsenic toxicity. Arsenic interferes with DNA methyltransferases, resulting in inactivation of tumor suppressor genes through DNA hypermethylation. Other studies suggest that arsenic-induced malignant transformation is linked to DNA hypomethylation subsequent to depletion of SAM, which results in aberrant gene activation, including oncogenes. Urinary profiles of arsenic metabolites may be a valuable tool for assessing human susceptibility to arsenic carcinogenesis. While controversial, the idea that unique arsenic metabolic properties may explain the apparent non-linear threshold response for arsenic carcinogenesis in humans. In order to address these outstanding issues, further efforts are required to identify an appropriate animal model to elucidate carcinogenic mechanisms of action, and to define dose-response relationships.  (+info)

Arsenic: health effects, mechanisms of actions, and research issues. (8/1444)

A meeting on the health effects of arsenic (As), its modes of action, and areas in need of future research was held in Hunt Valley, Maryland, on 22-24 September 1997. Exposure to As in drinking water has been associated with the development of skin and internal cancers and noncarcinogenic effects such as diabetes, peripheral neuropathy, and cardiovascular diseases. There is little data on specific mechanism(s) of action for As, but a great deal of information on possible modes of action. Although arsenite [As(III)] can inhibit more than 200 enzymes, events underlying the induction of the noncarcinogenic effects of As are not understood. With respect to carcinogenicity, As can affect DNA repair, methylation of DNA, and increase radical formation and activation of the protooncogene c-myc, but none of these potential pathways have widespread acceptance as the principal etiologic event. In addition, there are no accepted models for the study of As-induced carcinogenesis. At the final meeting session we considered research needs. Among the most important areas cited were a) As metabolism and its interaction with cellular constituents; b) possible bioaccumulation of As; c) interactions with other metals; d) effects of As on genetic material; e) development of animal models and cell systems to study effects of As; and f) a better characterization of human exposures as related to health risks. Some of the barriers to the advancement of As research included an apparent lack of interest in the United States on As research; lack of relevant animal models; difficulty with adoption of uniform methodologies; lack of accepted biomarkers; and the need for a central storage repository for stored specimens.  (+info)

The Binational Arsenic Exposure Survey (BAsES) was designed to evaluate probable arsenic exposures in selected areas of southern Arizona and northern Mexico, two regions with known elevated levels of arsenic in groundwater reserves. This paper describes the methodology of BAsES and the relationship between estimated arsenic intake from beverages and arsenic output in urine. Households from eight communities were selected for their varying groundwater arsenic concentrations in Arizona, USA and Sonora, Mexico. Adults responded to questionnaires and provided dietary information. A first morning urine void and water from all household drinking sources were collected. Associations between urinary arsenic concentration (total, organic, inorganic) and estimated level of arsenic consumed from water and other beverages were evaluated through crude associations and by random effects models. Median estimated total arsenic intake from beverages among participants from Arizona communities ranged from 1.7 to 14.1 µg
Descrição: Emerging data indicate that rice consumption may lead to potentially harmful arsenic exposure. However, few human data are available, and virtually none exist for vulnerable periods such as pregnancy. Here we document a positive association between rice consumption and urinary arsenic excretion, a biomarker of recent arsenic exposure, in 229 pregnant women. At a 6-mo prenatal visit, we collected a urine sample and 3-d dietary record for water, fish/seafood, and rice. We also tested womens home tap water for arsenic, which we combined with tap water consumption to estimate arsenic exposure through water. Women who reported rice intake (n = 73) consumed a median of 28.3 g/d, which is ∼0.5 cup of cooked rice each day. In general linear models adjusted for age and urinary dilution, both rice consumption (g, dry mass/d) and arsenic exposure through water (μg/d) were significantly associated with natural log-transformed total urinary arsenic (βrice = 0.009, βwater = 0.028, both P < ...
Background In the Ganges Delta, chronic arsenic poisoning is a health concern affecting millions of people who rely on groundwater as their potable water source. The prevalence of anemia is also high in this region, particularly among women. Moreover, arsenic is known to affect heme synthesis and erythrocytes and the risk of arsenic-induced skin lesions appears to differ by sex. Methods We conducted a case-control study in 147 arsenic-exposed Bangladeshi women to assess the association between anemia and arsenic-induced skin lesions. Results We observed that the odds of arsenic-related skin lesions were approximately three times higher among women who were anemic (hemoglobin , 120 g/L) compared to women with normal hemoglobin levels [Odds Ratio (OR) = 3.32, 95 % Confidence Intervals (CI): 1.29, 8.52] after adjusting for arsenic levels in drinking water and other covariates. Furthermore, 75 % of the women with anemia had adequate iron stores (serum ferritin ≥12 μg/L), suggesting that the ...
What is arsenic and where do you find it?. Arsenic is a naturally occurring element that is widely distributed in the earths crust. Arsenic can exist in several oxidation states with other elements as inorganic or organic arsenic. It is a silvery-gray, semimetallic substance that tarnishes in air. Inorganic and organic arsenic compounds are white in color, and have no smell or special taste. Inorganic arsenic occurs naturally in certain types of soils and rock formations. Inorganic arsenic compounds are mainly used as a preservative in pressure-treated wood to make it resistant to rotting and decay. Organic arsenic compounds are used to make insect killers, weed killers, and fungicides.. Who is exposed to arsenic?. Anyone can be exposed to arsenic since low levels of arsenic are present in soil, water, food, and air. People are primarily exposed to arsenic through eating food (fish and shellfish), drinking water, or breathing air containing arsenic. If wells are drilled in areas where naturally ...
To date, we have analyzed 29668 hand tubewell water samples from 1721 villages / wards in 250 GPs/ Municipal area from all 26 blocks of the district (Table I). Figure I shows the groundwater arsenic situation in each block of Murshidabad with Pie-diagram distribution. We observed arsenic concentration above 10 µg/L in 15953 (53.8%) hand tubewells and in 7911 (26.7%) above 50 µg/L and 1337 (4.5%) of the tubewells had arsenic concentrations above 300µg/L. In Murshidabad the number of villagers where we found arsenic concentration above 10, 50 and 300 µg/L are 1320, 971 and 281 respectively; and 25, 24 and 17 blocks were found to be contaminated with arsenic levels above 10, 50 and 300 µg/L. Arsenic level above 1000µg/L was found in 71 tubewells; the maximum arsenic contamination level found in this district is 3003µg/L in the Nawda and Raghunathganj I blocks. ...
TY - CHAP. T1 - Arsenic methylation capability and human health. AU - Hsueh, Yu Mei. AU - Huang, Yung Kai. AU - Chung, Chi Jung. PY - 2011/1/1. Y1 - 2011/1/1. N2 - The metabolism of inorganic arsenic takes place through a series of reactions, including reduction and oxidative methylation reactions. Biomethylation is considered a major detoxification pathway for inorganic arsenic. However, interspecies differences exist according to the efficiency with which inorganic arsenic is metabolized and excreted in urine. Intermediate trivalent methylated arsenic species are more cytotoxic and genotoxic than inorganic compounds. The arsenic methylation profile is influenced by demographic characteristics, lifestyle, diet and genetic susceptibility. Inefficient methylation is related to the risk of cancer and noncancer disease.. AB - The metabolism of inorganic arsenic takes place through a series of reactions, including reduction and oxidative methylation reactions. Biomethylation is considered a major ...
TY - BOOK. T1 - Arsenic Exposure and Health Effects IV. T2 - Arsenic exposure, null genotypes of glutathione s-transferase m1, t1 and p1, and risk of carotid atherosclerosis among residents in the Lanyang Basin of Taiwan. AU - Chappell, W.R.. AU - Abernathy, C.O.. AU - Calderon, R.L.. AU - Chiou, Hung-Yi. AU - Wang, I.H.. AU - Hsueh, Yu-Mei. AU - Chiou, S. T.. AU - Chou, Yi Li. AU - Teh, Hee-Wen. AU - Chen, Chien Jen. PY - 2001. Y1 - 2001. N2 - This collected volume of authoritative articles represents the state-of-the-art in arsenic research. Arsenic experts from around the world, participants in the Fourth International Conference on Arsenic Exposure and Health Effects organized by the Society of Environmental Geochemistry and Health in 2000, present their critical findings.A vital contribution to arsenic study and policy making, this volume examines the global impact of the toxin and discusses arsenic in the environment, mechanisms of arsenic metabolism and carcinogenesis, water treatment ...
To date, we have analyzed 8334 hand tubewell water samples from 1374 villages/Para/wards in 79 GPs/ Municipal area from 17 blocks of this district. Table I shows the distribution of arsenic in tubewell water from South 24 Parganas district. Figure I shows the groundwater arsenic contamination status in 17 blocks of South 24 Parganas with Pie-diagram distribution. Table I shows that arsenic concentration above 10 µg/L in 3500 (42%) hand tubewells and in 2359 (28.3%) above 50 µg/Land 547 (6.6%) had arsenic concentrations above 300µg/L. From the above analysis, it appears that groundwater in 12 block contains arsenic above WHO guideline value of arsenic in drinking water (10 µg/L) and 11 blocks exceeds Indian standard value for As in drinking water (50 µg/L). Arsenic level above 1000µg/L was found in 30 tubewells; the maximum arsenic contamination level found in this district is 3700µg/L in the Baruipur block. In blocks Diamond Harbour, Gosaba, Joynagar II and Thakurpukur all the tubewells ...
Inorganic arsenic is a human carcinogen that can target the liver, but its carcinogenic mechanisms are still unknown. Global DNA hypomethylation occurs during arsenic-induced malignant transformation in rodent liver cells. DNA hypomethylation can increase gene expression, particularly when occurring in the promoter region CpG sites, and may be a non-genotoxic mechanism of carcinogenesis. Thus, in the present study liver samples of male mice exposed to 0 (control) or 45 p.p.m. arsenic (as NaAsO2) in the drinking water for 48 weeks were analyzed for gene expression and DNA methylation. Chronic arsenic exposure caused hepatic steatosis, a lesion also linked to consumption of methyl-deficient diets. Microarray analysis of liver samples showed arsenic induced aberrant gene expression including steroid-related genes, cytokines, apoptosis-related genes and cell cycle-related genes. In particular, the expression of the estrogen receptor-α (ER-α), and cyclin D1 genes were markedly increased. RT-PCR and ...
Arsenic is carcinogenic, possibly partly through epigenetic mechanisms. We evaluated the effects of arsenic exposure and metabolism on DNA methylation. Arsenic exposure and methylation efficiency in 202 women in the Argentinean Andes were assessed from concentrations of arsenic metabolites in urine (inorgani
The German Federal Institute for Risk Assessment (BfR) is recommending that methods to minimise the levels of inorganic arsenic in rice products should be investigated in the light of recent dietary exposure studies in the German population.. Analyses of rice and rice products in Germany have shown that many contain relatively high concentrations of carcinogenic inorganic arsenic. Some products, such as rice cakes, were found to contain more inorganic arsenic than rice grains, but the reason for this is not known.. The BfR has calculated the intake of toxic inorganic arsenic compounds through the consumption of rice and rice products in Germany and concludes that they could make a significant contribution to the overall intake, especially in children. "Because inorganic arsenic compounds are classified as carcinogenic for humans, foodstuffs should only contain as little as reasonably achievable," says BfR President Professor Dr Dr Andreas Hensel.. The Institute is advising food manufacturers to ...
Studies into arsenic in food have been restricted by a lack of speciation data. Of more than 100,000 arsenic concentrations submitted to EFSA for evaluation, some 98% were reported as total arsenic but only a few broke figures down into organic and inorganic. European authorities have adopted EFSAs 2009 report and maximum limits for inorganic arsenic are planned to be introduced for rice and rice-based infant food. The introduction of maximum limits for cereals, algae and food supplements is also under discussion.. In the US the Food and Drug Administration has been measuring total arsenic concentrations in food products since 1991, but has yet to establish a specific standard. A guideline for arsenic (total) in crustacean and molluscs of 76ppm and 86 ppm respectively, was introduced in 1993, but it is currently examining the risks associated with longterm exposure.. CODEX has a standard for total arsenic in various foods (fats, margarine, olive oil, vegetable oil, mineral water and salt), but ...
Arsenic contamination takes serious turn in Narail. NARAIL June 12 : Arsenic contamination has taken a serious turn in all the three upazilas of the district in recent times, reports BSS. The number of arsenic affected people is increasing in Narail district day by day. Kalia upazila is a severely arsenic affected area in district. About 85 per cent tube-wells in the area are marked with red paint to warn the people that the waters of these tube-wells are contaminated by arsenic, Md Ahsan Habib, Upazila Nirbahi Officer, Kalia said.. In Kalia upazila the waters of 11,304 tube-wells have been tested, of which contamination of arsenic beyond permissible level has been detected in 8,507 tube- wells.In Lohagora upazila, waters of 1,023 tube-wells have been tested, of which contamination of arsenic has been detected in 696 tube-wells. In Narail Sadar upazila the waters of 1,269 tube-wells have been tested and of which contamination of arsenic has been detected in 499 tube-wells.. At least 55 persons ...
Beyond Pesticides, September 20, 2012) Raising questions about the adequacy of pesticide regulation, historically and ongoing, Consumer Reports published a new study yesterday that finds "worrisome" levels of inorganic arsenic in rice products. Arsenic is a known human carcinogen. This new report follows its earlier one that finds high levels of arsenic in apple and grape juice. The report finds elevated arsenic levels across organic and conventional products, raising serious questions about widespread environmental and soil contamination from past and continuing arsenical pesticide use. Although organic arsenic occurs naturally in the environment, it is synthetic inorganic arsenic that poses the biggest health hazards to humans and animals. So, humans are exposed to two kinds of the carcinogen in air, water, soil, and food sources. But unlike organic arsenic, which is found naturally in the environment, inorganic arsenic is present in our food as a result of pesticide application and animal ...
In June 2011, AdEdge Water Technologies was contacted by Sunrise Engineering to design, manufacture, and start up an arsenic removal system for the Spring Creek Utilities Company located in Elko, Nevada. The existing water system consisted of three wells feeding into a centralized distribution system with a maximum capacity of 1950 GPM and serves a population of 1500 residents. The AdEdge treatment system consists of five WaterPOD containerized units each housing an ADGS+ coagulation/filtration arsenic removal system. All five WaterPODs are integrated with an existing chlorine module to oxidize arsenic (III) to arsenic (V) for optimal removal. The units also integrate with an AdEdge ADIN chemical feed module which injects ferric chloride in the raw water to supplement the iron concentration to aid in arsenic removal. A CO2 pH adjustment module is furnished in each WaterPOD to reduce the pH from 7.89 to a neutral pH of 7. AdEdge also provided an H2Zero backwash recycle system that reclaims 100% ...
Silver Spring, MD (TFC) - An approved animal drug known as 3-Nitro® (roxarsone) was added to chicken feed prior to July 2011. This drug was known to contain an organic form of arsenic, which is known to be toxic, but indeed it is less toxic than inorganic arsenic. In 2011, the Food and Drug Administration admitted that roxarsone contained inorganic arsenic, which is a much more toxic compound. After discovering this, the FDAs Center for Veterinary Medicine and the Center for Food Safety and Applied Nutrition developed a new analytical method used to detect minute levels of arsenic in animal tissue.. It is important to note that organic arsenic is in the environment as a naturally occurring substance and can also be a contaminant in water, air, soil and various food products. In this case, the cause for concern is the organic arsenic found in 3-Nitro® that could transform into inorganic arsenic found in the chicken feed at high levels.. The FDA made a statement in the Product Safety ...
Arsenic biochemistry refers to biochemical processes that can use arsenic or its compounds, such as arsenate. Arsenic is a moderately abundant element in Earths crust, and although many arsenic compounds are often considered highly toxic to most life, a wide variety of organoarsenic compounds are produced biologically and various organic and inorganic arsenic compounds are metabolized by numerous organisms. This pattern is general for other related elements, including selenium, which can exhibit both beneficial and deleterious effects. Arsenic biochemistry has become topical since many toxic arsenic compounds are found in some aquifers, potentially affecting many millions of people via biochemical processes. The evidence that arsenic may be a beneficial nutrient at trace levels below the background to which living organisms are normally exposed has been reviewed. Some organoarsenic compounds found in nature are arsenobetaine and arsenocholine, both being found in many marine organisms. Some ...
TY - JOUR. T1 - Urinary excretion of arsenic following rice consumption. AU - Meharg, A. A.. AU - Williams, P. N.. AU - Deacon, C. M.. AU - Norton, Gareth John. AU - Hossain, Mohammed Kamal. AU - Louhing, D.. AU - Marwa, Ernest Melkiory. AU - Lawgalwi, Y.. AU - Taggart, Mark Antony. AU - Cascio, Claudia. AU - Haris, P.. PY - 2014/11. Y1 - 2014/11. N2 - Patterns of arsenic excretion were followed in a cohort (n = 6) eating a defined rice diet, 300 g per day d.wt. where arsenic speciation was characterized in cooked rice, following a period of abstinence from rice, and other high arsenic containing foods. A control group who did not consume rice were also monitored. The rice consumed in the study contained inorganic arsenic and dimethylarsinic acid (DMA) at a ratio of 1:1, yet the urine speciation was dominated by DMA (90%). At steady state (rice consumption/urinary excretion) ∼40% of rice derived arsenic was excreted via urine. By monitoring of each urine pass throughout the day it was observed ...
ARSENIC TREATMENT The 1998 European Drinking Water Directive includes an arsenic standard of 10 ?g/l, reduced from 50 ?g/l in the 1980 Directive. Learn more about ARSENIC TREATMENT on GlobalSpec.
Arsenic is found in multiple forms, some of which are more toxic to humans than others. In Alaska, most arsenic in groundwater is likely derived from inorganic arsenic that occurs naturally in the Earths crust, most commonly as the mineral arsenopyrite. When arsenopyrite oxidizes into its elemental components (similar to the way iron rusts) and those components enter the groundwater system, the resulting arsenic, as pentavalent arsenic [As(V) or arsenate] and trivalent arsenic [As(III) or arsenite], is toxic to humans. Arsenite is both more harmful and more mobile in groundwater than arsenate. Soils in some parts of Alaska have high concentrations of inorganic arsenic, which can leach into groundwater and render private well water unsafe for consumption. Arsenic in surface water, however, tends to bind with iron oxide and organic material, making it less mobile, and therefore, less likely to reach drinking water sources. Arsenic also accumulates in food crops grown in arsenic-rich soil or ...
treatment with 400 micrograms a day of folic acid, the U.S. recommended dietary allowance, reduced total blood arsenic levels in the study population by 14 percent..."Folic acid supplementation enhanced the detoxification of arsenic to a form that is more readily excreted in urine," said Mary Gamble...Folic acid increased the methylation or detoxification of arsenic in the body, allowing the body to change some of its more toxic metabolite, or methylarsonic (MMA) acid, to a form that could more easily be excreted from the body, thus lowering the levels of arsenic found in the blood..." ...
2000, describes a method for removing arsenic from fly ash, in which arsenic is recovered as scorodite. The first treatment stage of the arsenic-containing material is the oxidation of trivalent arsenic (As(lll)) into pentavalent arsenic (As(V)) with a gas containing sulphur dioxide and oxygen in oxidising conditions, in which arsenic does not precipitate. After this, arsenic is precipitated in atmospheric conditions, in which the Fe(III)/As(V) mole ratio is specified as 1. Precipitation is carried out either in one or several stages, but precipitation as scorodite demands the over-saturation of the solution, which is achieved by recycling scorodite crystals to the first precipitation reactors and simultaneously neutralising the suspension. A beneficial pH range is around 1-2 and this is maintained by feeding a suitable neutralising agent into the precipitation stage. In these conditions, arsenic can be precipitated to the level of 0.5 g/l. The final arsenic removal to a level below 0.1 mg/l is ...
Millions now suffer the effects of chronic arseniasis related to environmental arsenic exposure. The biological mechanisms responsible for arsenic-induced toxicity and especially chronic effects, including cancer, are not well known. The U.S. Armed Forces Institute of Pathology (AFIP) is participati …
Commonly found arsenic species in human urine are AsIII (arsenite), AsV (arsenate), MMA (monomethyl arsenic acid), DMA (dimethylarsinic acid) and AB (arsenobetaine). Evidence has shown that these species vary in toxicity and have the potential to be used as biomarkers for human exposure. For human exposure assessments in areas that have naturally occurring arsenic contaminated sources, or those who live or work near contaminated environmental sites where arsenic has been used, it is important to fully understand what species of arsenic residents are being exposed to in order to grasp the risk of arsenic exposure. Since it is difficult to determine direct human exposures, a swine model was used as a surrogate. Urine samples from these studies were analyzed using high-performance liquid chromatography and inductively coupled plasma mass spectrometry (LCICPMS) to quantitate arsenic species. There was a range of 64-74% DMA determined in swine urine samples for all test soils where a range of 60-75% ...
Researchers at the Lawrence Berkeley National Laboratory have invented ARUBA (Arsenic Removal Using Bottom Ash) a material that effectively and affordably removes high concentrations of arsenic from contaminated groundwater. The technology is cost-effective because the substrate?bottom ash from coal fired power plants?is a waste material readily available in South Asia. During fieldwork in four sub-districts ofBangladesh, ARUBA reduced groundwater arsenic concentrations as high as 680 ppb to below the Bangladesh standard of 50 ppb. Key results from three trips in Bangladesh and one trip to Cambodia include (1) ARUBA removes more than half of the arsenic from contaminated water within the first five minutes of contact, andcontinues removing arsenic for 2-3 days; (2) ARUBA?s arsenic removal efficiency can be improved through fractionated dosing (adding a given amount of ARUBA in fractions versus all at once); (3) allowing water to first stand for two to three days followed by treatment with ARUBA produced
According to recent reports, millions of people across the globe are suffering from arsenic (As) toxicity. Arsenic is present in different oxidative states in the environment and enters in the food chain through soil and water. In the agricultural field, irrigation with arsenic contaminated water, that is, having a higher level of arsenic contamination on the top soil, which may affects the quality of crop production. The major crop like rice (Oryza sativa L.) requires a considerable amount of water to complete its lifecycle. Rice plants potentially accumulate arsenic, particularly inorganic arsenic (iAs) from the field, in different body parts including grains. Different transporters have been reported in assisting the accumulation of arsenic in plant cells; for example, arsenate (AsV) is absorbed with the help of phosphate transporters, and arsenite (AsIII) through nodulin 26-like intrinsic protein (NIP) by the silicon transport pathway and plasma membrane intrinsic protein aquaporins. Researchers and
Inorganic arsenic is used for hardening copper and lead alloys. It also is used in glass manufacturing as a decolorizing and refining agent, as a component of electrical devices, in the semiconductor industry, and as a catalyst in the production of ethylene oxide. Arsenic compounds are used as a mordant in the textile industry, for preserving hides, as medicinals, pesticides, pigments, and wood preservatives. Approximately 90% of the domestic consumption of arsenic is currently used with production of chromated copper arsenate (CCA), a wood preservative, the production of which is currently being phased out. Arsenic is also found naturally in the environment and is typically present in soil and water at detectable levels. Sources of human exposure to inorganic arsenic include drinking water, diet, air, and soils (which can contain naturally occurring arsenic or contamination from anthropogenic sources). This draft IRIS health assessment addresses only cancer human health effects that may result ...
Downloadable (with restrictions)! We exploit recent molecular genetics evidence on the genetic basis of arsenic excretion and unique information on family links among respondents living in different environments from a large panel survey within a theoretical framework incorporating optimizing behavior to uncover the hidden costs of arsenic poisoning in Bangladesh. We provide for the first time estimates of the effects of the ingestion and retention of inorganic arsenic on direct measures of cognitive and physical capabilities as well as on the schooling attainment, occupational structure, entrepreneurship and incomes of the rural Bangladesh population. We also provide new estimates of the effects of the consumption of foods grown and cooked in arsenic-contaminated water on individual arsenic concentrations. The estimates are based on arsenic biomarkers obtained from a sample of members of rural households in Bangladesh who are participants in a long-term panel survey following respondents and their
The WHO recommended value of arsenic contamination in water is 0.01 mg/l, while the maximum permissible limit for Bangladesh and India has been fixed at 0.05 mg/l. In the DCH-SOES survey, less than 0.01 mg/l arsenic concentration was detected in 46% or 2803 out of 6101 water samples while above the WHO recommended value (0.01 mg/l) was found in the rest 54% or 3298 samples. On the other hand, arsenic concentration at less than the permissible limit (0.05 mg/l) was detected in 62% or 3783 samples, while above the limit was found in the rest 38% or 2318 water samples. Arsenic contamination at higher level than the WHO recommended value was found in the tube-wells of 52 districts out of the 60 surveyed. Of these, the level of arsenic presence exceeds the maximum permissible limit in the tube-wells water of 41 districts. In 11 districts, the level of arsenic concentration was found more than the WHO recommended value, but less than the maximum permissible limit. That means, highest 0.05 mg/l exist ...
In mammals, methylation occurs in the liver by methyltransferases, the products being the (CH3)2AsOH (dimethylarsinous acid) and (CH3)2As(O)OH (dimethylarsinic acid), which have the oxidation states As(III) and As(V), respectively.[2] Although the mechanism of methylation of arsenic in humans has not been elucidated, the source of methyl is methionine, which suggests a role of S-adenosyl methionine.[25] Exposure to toxic doses begin when the livers methylation capacity is exceeded or inhibited. There are two major forms of arsenic that can enter the body, arsenic (III) and arsenic (V).[26] Arsenic (III) enters the cells though aquaporins 7 and 9, which is a type of aquaglyceroporin.[26] Arsenic (V) compounds use phosphate transporters to enter cells.[26] The arsenic (V) can be converted to arsenic (III) by the enzyme purine nucleoside phosphorylase.[26] This is classified as a bioactivation step, as although arsenic (III) is more toxic, it is more readily methylated.[27]. There are two routes ...
The arsenic speciation and arsenic removal in chitosan packed column were studied. Arsenic removal experiments were carried out with an arsenic standard solution (1.0 mg/l) and drilled well water samples from Limon Mine Community at different pH, water flowrate, and volume of adsorbent material. The simulation of arsenic speciation was carried out at a pH range from 0 to 12, a temperature of 25ºC, a pE equal to 4, and a total arsenic concentration of 1.34 x 10-5 mol kg-1. According to speciation calculations arsenic is found mainly in oxidized form in the conditions of Limon Mines drilled well waters, dihydrogen arsenate ion (H2AsO4-), and hydrogen arsenate ion (HAsO42-) being the major species. The experiments showed that arsenic adsorption depends mainly on the pH as well as the activity of functional groups that compose the chitosan structure. At pH 3 and volume of adsorbent material of 337.8 cm3 an adsorption of 94% was obtained from arsenic standard solution, and the arsenic present in ...
Arsenic toxicity is species-dependent for mammals and is transformed to other metabolites in various organs. In order to understand its metabolism, in-vitro simulation experiments were set up for various organ tissues. As(V) was transformed to As(III), while DMA(V) was changed to DMAS in sheep rumen, but the suspected MA-V) was not formed. This is different for the incubation of seaweed in rumen fluid, which points to a different unknown source for MA(V). In another study, dog MDCK kidney cells showed that inorganic arsenicals were methylated in kidney cells while the exposed DMAS was only oxidized to DMA(V) in kidney cells, and the exposed DMA(V) rarely transformed. The toxicities of arsenicals in dog kidney cells is dependant upon the uptake rates and the transformation of arsenicals. DMAS was as toxic as the inorganic arsenic species and an order to magnitude more toxic than the oxo-species. Methylated arsenic species can accumulate in hair and wool and can be used as a biomarker for arsenic ...
Arsenic concentrations in domestic well-water throughout large regions of Minnesota exceed the public drinking-water standard set by the U.S. Environmental Protection Agency. The frequency of arsenic contamination in domestic wells is a serious and widespread public-health concern; long-term exposure to arsenic is toxic to humans, even at extremely low concentrations. Although the Minnesota well code now requires that each new potable water-supply well be tested for arsenic, the information can come only after the well has been drilled. Although homeowners can purchase arsenic-removal systems, they are expensive, require maintenance, and do not provide alarms for high arsenic concentrations or system failure. It would be preferable if wells could be placed where the risk of arsenic contamination of groundwater is known to be low. This article summarizes the authors collaboration with the U.S. Geological Survey, the Minnesota Geological Survey, and the Minnesota Department of Natural Resources to ...
Arsenic contamination takes serious turn in Chandpur. CHANDPUR, June 25: Arsenic contamination has taken a serious turn in Chandpur district recently.. This was disclosed by Md. Sadeq Hossain, Executive Engineer of the local Public Health Engineering Department, in an exclusive talk with this correspondent recently.. About 1.25 lakh shallow tube-wells of all the eight upazilas of the district have already been sealed as the waters of those contain arsenic beyond permissible limits which are very much harmful to human body, he added. He disclosed that on an average 98 per cent shallow tube-wells of the district are arsenic contaminated.. A survey shows that 96 per cent tube-wells in Hajiganj, 98 per cent tube-wells in Faridganj, Shahrasti and Kochua, 85 per cent tube-wells in Haimchar and 80 per cent tube-wells in Matlab Sadar and newly created Matlab North upazilas are arsenic contaminated.. It is officially learnt that at present 5,000 people, mostly old men, women and children have been ...
Concomitant exposures to arsenic and polycyclic aromatic hydrocarbons (PAHs) such as benzo[a]pyrene (BaP) are widespread. While BaP acts by binding to and inducing mutations in critical sites on DNA, the mechanism(s) of arsenic carcinogenesis remains unknown. Data from epidemiological studies of arsenic copper smelter workers and arsenic ingestion in drinking water suggest a positive interaction f
Digging of tube wells to provide drinking water in Bangladesh has had the side-effect of exposing people to arsenic which contaminates groundwater in the country. This project investigates (i) how arsenic concentrations that result from the ingestion of arsenic affect the capabilities and productivity of the rural Bangladesh population and (ii) how changes in food consumption, by affecting arsenic ingestion and excretion, affect arsenic concentrations. ...
Ingestion of arsenic is relatively common in the setting of homicide and is occasionally used in deliberate self-poisoning. Arsine gas and CCA exposure are not uncommon industrial exposures. Most organs can be involved and the diagnosis may not be obvious. \\ \\ Arsenic is a classic poison; implicated in the deaths of Tchaikovsky and Napoleon. It has also been used as a therapeutic substance since ancient times. It has been used in traditional Chinese medicines and most recently as a chemotherapeutic agent for the treatment of acute promyelocytic leukaemia. Chronic arsenic poisoning is a major public health crisis and an environmental disaster in Bangladesh and West Bengal, due to the contamination of ground water that affects millions of people. These chronic problems are beyond the scope of this course. \\ \\ Arsenic exists in many forms: arsine gas, elemental arsenic, inorganic oxides and organic arsenic. Acute arsenic poisoning is rare. The elemental form of arsenic is non-toxic but the ...
Compounds of arsenic were recognized as highly toxic long before arsenic was even recognized as an element in 1649 (by Schroeder, a German pharmacist). Nero used arsenic to poison Britannicus in 55 AD to secure the Roman throne. In 17th century France, white arsenic (As2O3) was known as poudre de succession (inheritance powder). Today, approximately 90 percent of all arsenic used in the US is used as a wood preservative. Arsenic is also used in electronics (gallium arsenide) and continues to be used in agricultural chemicals (pesticides, insecticides, herbicides, algaecides, fungicides and growth stimulants for plants and animals). Arsenic, being an element, is never destroyed once released into the environment. It will be with us forever.. Arsenic consumption is linked to a number of adverse health effects including skin, bladder and lung cancer. Oxygenated compounds of arsenic (arsenates: As+5 and arsenites: As+3) are soluble in water and, when ingested, mimic phosphates in the body. They can ...
Quilicura is a municipality located in the Santiago Metropolitan Region in Chile. Well #3 has a flow of 1600 gallons per minute (100 liters per second). The well has a high concentration of arsenic that fluctuates between 0.040 mg/L and 0.060 mg/L, well above the World Health Organization standard of 0.010 mg/L. In addition to the high arsenic concentration, the site has challenges with pH that ranges from 7.0 to 9.5. AdEdge was contacted by EcoRiles in 2013 to design, manufacture, and commission an arsenic removal solution for the Quilicura municipalty.The AdEdge arsenic treatment solution consists of four WaterPOD containerized systems rated for a combined total of 1600 gpm (100 lps). Each WaterPOD contains six 48-inch carbon steel vessels in a parallel configuration. The vessels are loaded with AdEdge Bayoxide E33 granular ferric oxide media. The E33 binds the arsenic to the media structure and does not lose that bond during backwash. The system has an ADIN chemical feed dosing system that is ...
Arsenic Removal During Iron Removal. Darren A. Lytle U.S. Environmental Protection Agency ORD, NRMRL, WSWRD, TTEB, Cincinnati, Ohio 45268 [email protected] Arsenic Rule Webcast October 20, 2004. Iron-Based Arsenic Removal Processes. Slideshow 4256770 by luigi
BACKGROUND A large population in West Bengal, India has been exposed to naturally occurring inorganic arsenic through their drinking water. A cross-sectional survey involving 7683 participants of all ages was conducted in an arsenic-affected region between April 1995 and March 1996. The main focus of the study was skin keratoses and pigmentation alterations, two characteristic signs of ingested inorganic arsenic. Strong exposure-response gradients were found for these skin lesions. The study also collected limited information concerning respiratory system signs and symptoms, which we report here because increasing evidence suggests that arsenic ingestion also causes pulmonary effects. METHODS Participants were clinically examined and interviewed, and the arsenic content in their current primary drinking water source was measured. There were few smokers and analyses were confined to non-smokers (N = 6864 participants). RESULTS Among both males and females, the prevalence of cough, shortness of breath
Open peer review is a system where authors know who the reviewers are, and the reviewers know who the authors are. If the manuscript is accepted, the named reviewer reports are published alongside the article. Pre-publication versions of the article and author comments to reviewers are available by contacting [email protected] All previous versions of the manuscript and all author responses to the reviewers are also available.. You can find further information about the peer review system here.. ...
1. Total arsenic The method described in this manual assesses arsenic exposure by analyzing urine through the use of inductively coupled-plasma dynamic reaction cell-mass spectrometry (ICP-DRC-MS). Urine is analyzed because urinary excretion is the major pathway for eliminating arsenic from the mammalian body. This method achieves rapid and accurate quantification of total urinary arsenic. Total urine arsenic concentrations are determined by using ICP-DRC- MS. This multielement analytical technique is based on quadrupole ICP-MS technology and includes DRC™ technology, which minimizes or eliminates much argon-based polyatomic interference. Coupling radio frequency power into a flowing argon stream seeded with electrons creates the plasma, the heat source, which is ionized gas suspended in a magnetic field. Predominant species in the plasma are positive argon ions and electrons. Diluted urine samples are converted into an aerosol by using a nebulizer inserted within a spray chamber. A portion of ...
Exposure to arsenic, a common environmental toxin found in drinking water, leads to a host of neurological pathologies. We have previously demonstrated that developmental exposure to a low level of arsenic (50ppb) alters epigenetic processes that underlie deficits in adult hippocampal neurogenesis leading to aberrant behavior. It is unclear if arsenic impacts the programming and regulation of embryonic neurogenesis during development when exposure occurs. The master negative regulator of neural-lineage, REST/NRSF, controls the precise timing of fate specification and differentiation of neural stem cells (NSCs). Early in development (embryonic day 14), we observed increased expression of Rest, its co-repressor, CoREST, and the inhibitory RNA binding/splicing protein, Ptbp1, and altered expression of mRNA spliced isoforms of Pbx1 that are directly regulated by these factors in the male brain in response to prenatal 50ppb arsenic exposure. These increases were concurrent with decreased expression of
This blood test is used to measure Arsenic levels. Arsenic is a common cause of acute poisoning through heavy metals. Arsenic enters the environment through the smelting of copper, zinc and lead and is released through the manufacturing of certain chemicals. Pesticides that contain arsenic, when manufactured, release arsine gas. Arsenic has been found in water supplies around the world, which has the potential to leach into seafood. Arsenic is found in rat poisoning, fungicides and products used to protect wood. Arsenic toxicity affects the blood, kidneys, skin, digestive tract and central nervous system ...
Arsenic is a highly poisonous metallic element in the nitrogen family of group Va in the periodic table. Symbol As; aomic number 33; atomic mass 74.9216; melting point ca 817°C; sublimation point ca 613°C; specific gravity 6.80 or 7.004; 5.73; valence -3, 0, +3, or +5.; electronic config. [Ar]3d104s24p3. It appears in three allotropic forms, yellow, black, and gray. The stable form is a brittle, steel-gray hexagonal solid that oxidizes rapidly in air, and at high temperatures burns to form a white cloud of arsenic trioxide. Arsenic and some arsenic compounds sublime when heated and convert to gaseous form. Arsenic is an omnipresent element as arsenic minerals in the various lithosphere or fossil fuels including realgar, orpiment, and arsenopyrite. It is prepared commercially from arsenical pyrites (sulfide ores) by condensation of sublimed gas and by the reduction of white arsenic with carbon. This element contributes hardness and is used in preparing alloys for hard and corrosion-resistant ...
The authors estimated the global burden of disease for bladder, lung, and skin cancers attributable to inorganic arsenic in food. The authors - 1) established dose response estimates by converting dose response estimates for water exposure to human dose; 2) estimated exposure using data on a common range of arsenic content for food crops grown in different parts of the world and dietary patterns in different parts of the world; 3) multiplied the dose-response slope factor with the estimated range of daily dietary inorganic arsenic exposure to characterize cancer risk; and 4) summed across different populations to estimate the global burden of a particular arsenic-induced cancer ...
Protection against arsenic damage in organisms positioned deep in the tree of life points to early evolutionary sensitization. Here, marine sedimentary records reveal a Proterozoic arsenic concentration patterned to glacial-interglacial ages. The low glacial and high interglacial sedimentary arsenic concentrations, suggest deteriorating habitable marine conditions may have coincided with atmospheric oxygen decline after ~2.1 billion years ago. A similar intensification of near continental margin sedimentary arsenic levels after the Cryogenian glaciations is also associated with amplified continental weathering. However, interpreted atmospheric oxygen increase at this time, suggests that the marine biosphere had widely adapted to the reorganization of global marine elemental cycles by glaciations. Such a glacially induced biogeochemical bridge would have produced physiologically robust communities that enabled increased oxygenation of the ocean-atmosphere system and the radiation of the complex ...
Water supplies in many parts of the world contain naturally occurring arsenic. Previous studies have shown that arsenic at high doses can cause cancer of the bladder. The risk at lower doses is unknown. This study is examining the relationship between ingested arsenic and bladder cancer in central Nevada and Kings County, California, two areas where a large percentage of the population was exposed to drinking water containing arsenic at low to moderate levels. Approximately 200 people with bladder cancer and 400 people without bladder cancer will be included. Subjects are interviewed by telephone about past residences, occupations, diet, drinking water consumption, and other lifestyle factors. Arsenic measurements in well water have been collected from the appropriate state agencies and are being matched with residences and drinking water consumption rates to estimate lifetime arsenic exposures for each subject. People with bladder cancer will then be compared to those without to see if people ...
Arsenic is a toxic metalloid which is widely distributed in nature. It is normally present as arsenate under oxic conditions while arsenite is predominant under reducing condition. The major discharges of arsenic in the environment are mainly due to natural sources such as aquifers and anthropogenic sources. It is known that arsenite salts are more toxic than arsenate as it binds with vicinal thiols in pyruvate dehydrogenase while arsenate inhibits the oxidative phosphorylation process. The common mechanisms for arsenic detoxification are uptaken by phosphate transporters, aquaglyceroporins, and active extrusion system and reduced by arsenate reductases via dissimilatory reduction mechanism. Some species of autotrophic and heterotrophic microorganisms use arsenic oxyanions for their regeneration of energy. Certain species of microorganisms are able to use arsenate as their nutrient in respiratory process. Detoxification operons are a common form of arsenic resistance in microorganisms. Hence, the use of
Rep. Rosa DeLauro (D-CT) introduced a bill in Congress on Thursday which would limit the amount of inorganic arsenic permitted in rice and rice-based foods. The R.I.C.E (Reducing food-based Inorganic Compounds Exposure) Act would require the Food and Drug Administration to set a maximum permissible level of inorganic arsenic in rice and food containing rice. "Inorganic arsenic… Continue Reading. ...
Demonstration of Emerging Technologies for Arsenic Removal Vol 1 by Yu-Jung Chang starting at $173.72. Demonstration of Emerging Technologies for Arsenic Removal Vol 1 has 1 available editions to buy at Alibris
Arsenic dissolved in water is acutely toxic and can lead to a number of health problems. Long-term exposure to arsenic in drinking-water causes increased risks of cancer in the skin, lungs, bladder and kidney. It also leads to other skin-related problems such hyperkeratosis and changes in pigmentation. Consumption of arsenic also leads to disturbance of the cardiovascular and nervous system functions and eventually leads to death. These health effects sometimes collectively referred to as arsenicosis have been demonstrated in many studies. Increased risks of lung and bladder cancer and of arsenic-associated skin lesions have been reported for consuming drinking-water with arsenic concentrations equal to or greater than 50 parts per billion (or microgram per liter). (WHO Environmental Health Criteria, No. 224: Arsenic).. Arsenicosis is recognizable from skin colour changes, blotches all over the face and body, hyper pigmentation on the chest and upper arms, hard patches on palms and soles of the ...
Results show that approximately 25,000 Canadians are currently exposed to arsenic at work. Of these, 90% are male.. The industry with the largest number of workers exposed is the foundation, structure and building exterior contractors, sawmills and wood preservation, building construction, and farms. Exposure in these groups primarily occurs through contact with arsenic-containing CCA wood preservatives. Workers may also be exposed to arsenic in the workplace in industries other than wood preservation. For example, exposure to arsenic occurs in the non-ferrous metal production and processing industry, as well as in iron and steel mills, where arsenic is produced as a by-product of the processing of other metals.. When exposure is examined by occupation, the largest groups of workers exposed to arsenic are construction trades helpers and labourers, carpenters, machinists and machining and tooling inspectors, and labourers in wood, pulp and paper processing.. Overall, larger numbers of exposed ...
Inorganic arsenic is an established cause of lung and skin cancer. Epidemiological evidence from Taiwan suggests that arsenic causes more fatal internal cancers, with the highest relative risks reported for bladder cancer. We conducted a cross-sectional biomarker study in a Chilean male population chronically exposed to high (70 subjects) and low (55 subjects) arsenic levels in their drinking water (average concentrations, 600 and 15 micrograms As/liter, respectively). A fluorescent version of the exfoliated bladder cell micronucleus (MN) assay was used employing fluorescence in situ hybridization with a centromeric probe to identify the presence (MN+) or absence (MN-) of whole chromosomes within micronuclei, thereby determining the mechanism of arsenic-induced genotoxicity in vivo. We divided the study population into quintiles by urinary arsenic levels and found an exposure-dependent increase in micronucleated cell prevalence in quintiles 2-4 (urinary arsenic, 54-729 micrograms/liter). The ...
Landfills have the potential to mobilize arsenic via induction of reducing conditions in groundwater and subsequent desorption from or dissolution of arsenic-bearing iron phases. Laboratory incubation experiments were conducted with materials from a landfill where such processes are occurring. These experiments explored the potential for induced sulfate reduction to immobilize dissolved arsenic in situ. The native microbial community at this site reduced sulfate in the presence of added acetate. Acetate respiration and sulfate reduction were observed concurrent with dissolved iron concentrations initially increasing from 0.6 mu M (0.03 mg L-1) to a maximum of 111 mu M (6.1 mg L-1) and subsequently decreasing to 0.74 mu M (0.04 mg L-1). Dissolved arsenic concentrations initially covaried with iron but subsequently increased again as sulfide accumulated, consistent with the formation of soluble thioarsenite complexes. Dissolved arsenic concentrations subsequently decreased again from a maximum of ...
In January 2016, the EU imposed a maximum limit of inorganic arsenic on manufacturers in a bid to mitigate associated health risks. Researchers at the Institute for Global Food Security at Queens have found that little has changed since this law was passed and that 50 percent of baby rice food products still contain an illegal level of inorganic arsenic.. "This research has shown direct evidence that babies are exposed to illegal levels of arsenic despite the EU regulation to specifically address this health challenge. Babies are particularly vulnerable to the damaging effects of arsenic that can prevent the healthy development of a babys growth, IQ and immune system to name but a few," said Andy Meharg, lead author of the study and professor of plant and soil sciences at Queens.. Rice has, typically, 10 times more inorganic arsenic than other foods and chronic exposure can cause a range of health problems including developmental problems, heart disease, diabetes and nervous system ...
In addition to rice, it was also found that chicken and dairy were other significant sources of arsenic. When a Masters Degree Candidate decided to look into this arsenic issue in chicken more closely, he discovered among other things, that three arsenic-containing antibiotics were fed to chickens here in the United States since 1944. (By the way, the use of these antibiotics were refused by European markets.) The accepted thought in the United States was that arsenic was not a problem since they were using organic arsenic and not the poisonous inorganic arsenic. https://www.iatp.org/files/421_2_80529.pdf ...
The USEPA recommends that water well owners with elevated arsenic use arsenic removal technologies or use an alternate source of water.
The World Health Organization (WHO) calls it the "biggest mass poisoning of a population in history". There are millions of Bangladeshis exposed to poisonous arsenic from drinking water. Even rice and other crops irrigated with toxic water are in question. The rise of cancer, ulcers, gangrene, and painful warts are reported from various corners of Bangladesh those are directly linked to arsenic poisoning. WHO says that within the next decade one-tenth of all deaths in southern Bangladesh will be due to this arsenic crisis. That is about 20,000 deaths per year. Will anyone be held responsible for this? Arsenic, Microbes and Tragedy of Turtle Pace Scientists observe that the arsenic poisoning in water is a natural phenomenon. Many of them believe that arsenic has been eroded naturally from the Himalayas by the Ganges over thousands of years and deposited amid silt in the rivers delta region. [1] Many believe that arsenic used to be attached with the silt on iron hydroxide particles. And now, ...
Groundwater in California is very precious, yet what we can withdraw is often contaminated with natural and anthropogenic pollution sources. We have examined the Borrego Valley (BV) groundwater (N = 6 wells) in southern California to understand the source of arsenic and nitrate in some of its groundwater production wells. The results show that the arsenic values range from <2 ppb to 12.2 ppb and the nitrate values from <1 ppm to 10.2 ppm for different wells respectively. The results showed that the arsenic concentration increased 270% for the well # ID1-10 since 2004 and showed an increase of 63% since 2013 respectively. For other wells the results showed an increase of 147% and 72% since 2001. The nitrate concentration has jumped 42% in concentration since last year in one of the wells. The objective of this study is to understand the nature and source of arsenic and nitrate in BV groundwater aquifer as to how this change in arsenic and nitrate concentration occurs through the time. The arsenic
The result of this study demonstrates a dose-response relationship between inorganic arsenic exposure from drinking water and risk of hypertension. Despite the lack of previous individual exposure data and the lack of information on potential confounders other than those we controlled for, the association seems strong enough to support the possibility of a causal association. There is also good agreement with the observations from Taiwan.8 Although there was no comprehensive, systematic sampling of the water supplies of the study area, the existing water measurements permit a reasonably good assessment of arsenic exposure. Furthermore, the effect of various unknown factors, such as use of bottled water, would dilute the effect and lead to an underestimation of the association. Because our study subjects were recruited from villages in which residents had similar occupations, socioeconomic status, lifestyles, and dietary habits, including salt intake, the variation among subjects of these ...
The objective of this study was to precipitate CaCO3in a groundwater media to reduce dissolved arsenic concentrations. In this study a mixture of ureolytic calcite and aragonite were precipitated using groundwater as the media. Although precipitation of carbonate was successful using Ardkenneth groundwater, arsenic concentrations were not reduced. Ureolytic calcite and aragonite precipitated using broth as the media and resulted in a decrease in arsenic concentrations of up to 88% from the initial 0.7 μg L-1 concentration. Ureolytic carbonate precipitation required the inoculation of ureolytic cultures isolated from groundwater into both the groundwater and broth media. Precipitates in the inoculation experiments were identified using infrared spectroscopy techniques.The decrease in arsenic concentrations in the inoculated urea treated broth samples compared to the groundwater samples was attributed to the greater amounts of precipitate formed in the broth media. The broth had a free Ca(II) ...
According to the Associated Press, the FDA finally confirmed that chickens given the drug do indeed test positive for inorganic arsenic.. After years of sweeping the issue under the rug, the FDA has now finally admitted that chicken meat sold in the USA contains arsenic, a cancer-causing toxic chemical thats fatal in high doses. But the real story is where this arsenic comes from: Its added to the chicken feed on purpose! As far back as 2006, the IATPs report Playing Chicken: Avoiding Arsenic in your meat estimated that more than 70 percent of all U.S. chickens raised for meat are fed arsenic. It is added to induce faster weight gain on less feed, and creating the perceived appearance of a healthy color in meat from chickens, turkeys and hogs.. The Food and Drug Administration (FDA) has found that nearly half of all chickens tested have absorbed inorganic arsenic, the most toxic form, in their liver. Based on that finding, the agency asked Pfizer to stop manufacturing Roxarsone, the ...
Arsenic metabolism, but not iAs exposure, was prospectively associated with diabetes incidence in American Indians from Arizona, Oklahoma, and North and South Dakota. Higher iAs% and DMA% in urine, due to lower MMA%, was associated with higher diabetes incidence. Consistently, higher MMA% was associated with lower risk of diabetes. The associations persisted after adjustment for sociodemographic factors, smoking, alcohol, kidney function, and measures of adiposity. These novel findings support that arsenic metabolism patterns, in particular lower MMA%, may be a predisposing factor for diabetes. Arsenic exposure, measured by the concentration of inorganic plus methylated arsenic species in urine, however, was not associated with diabetes incidence in this study population. The study was conducted in a population with a high burden of obesity and diabetes (49) and characterized by low to moderate arsenic exposure levels.. Nongenetic determinants of arsenic metabolism include sex (women have higher ...
DESCRIPTION (provided by applicant): Today, arsenic (As) poisoning is one of the major environmental threats worldwide as millions of human beings have been exposed to excessive arsenic through contaminated drinking water. The serious toxicity of arsenic has been well documented. Worldwide, communities demand novel separation technologies for the removal of arsenic from drinking water. Conventional adsorbent technologies currently in use for remediation of metal-contaminated water have various limitations in terms of capacity, selectivity and robustness. In this Phase I program, an arsenic selective ligand-anchored fiber adsorbent will be developed as the basis for an innovative arsenic removal technology for drinking water with higher capacity, good selectivity, and enhanced robustness compared to conventional technologies such as ion exchange, activated alumina, and others. The goals for this Phase I program will be achieved through the following Specific Aims: 1) to functionalize fibers with ...
LOS ANGELES - The U.S. Environmental Protection Agency last week ordered D&D Mobile Home Park to address violations of the Safe Drinking Water Act. D&D, located on the Torres Martinez Desert Cahuilla Indian Reservation in Riverside County, was found to have high levels of arsenic in its public system that provides drinking water to its 300 mobile park residents. The order requires D&D to come into compliance with the arsenic drinking water standard as well as conduct more consistent arsenic monitoring. Sampling data showed arsenic at concentrations as high as 0.059 milligrams per liter-almost six times the EPAs maximum contamination levels for arsenic. Sampling data also showed the presence of coliform bacteria. D&D is a privately owned and operated system on the Indian Reservation. The order requires D&D to submit, within 90 days, a written plan for EPA review that will demonstrate the mobile parks strategy to bring the water system into compliance with the federal arsenic standard by ...
Arsenic is a naturally occurring metalloid that can enter rivers and ground water. Epidemiological studies have correlated arsenic exposure with adverse developmental outcomes such as low birth weight, delays in the use of musculature, and altered locomotor activity. Previously in our lab, embryonically exposed killifish (Fundulus heteroclitus) were found to have changes in muscle development. Microarray analysis showed several genes involved in muscle development and formation altered and histological analysis showed an increase in small muscle fiber size. In this study, killifish were used to help understand if changes in muscle formation and fiber density after embryonic exposure persist, are exacerbated, or lessen during an arsenic exposure regime typical of humans. Killifish embryos were exposed to concentrations of arsenic ranging from 0-5000 ppb. Upon hatching the juveniles were split and transferred into either clean water or continued receiving the same arsenic exposure. Samples were collected
5.1 Exposure data. Exposure of high levels of arsenic in drinking-water has been recognized for many decades in some regions of the world, notably in China, Taiwan (China) and some countries in Central and South America. More recently, it has been discovered that a number of other regions have drinking-water that is highly contaminated with arsenic. In most of these regions, the drinking-water source is groundwater, naturally contaminated from arsenic-rich geological formations. The primary regions where high concentrations of arsenic have been measured in drinking-water include large areas of Bangladesh, China and West Bengal (India) and smaller areas of Argentina, Australia, Chile, Mexico, Taiwan (China), the USA and Viet Nam. In some areas of Japan, Mexico, Thailand and other countries, mining, smelting and other industrial activities have contributed to elevated concentrations of arsenic in local water sources.. Levels of arsenic in affected areas may range from tens to hundreds or even ...
TY - ABST. T1 - Determination of inorganic arsenic by fast anion exchange HPLC-ICP-MS. AU - Jerše, Ana. AU - Høgsbro, Julie Storm. AU - Larios, Raquel. AU - Sloth, Jens J.. PY - 2019. Y1 - 2019. KW - Inorganic arsenic. KW - HPLC. KW - ICP-MS. KW - Food. KW - Feed. M3 - Conference abstract for conference. ER - ...
Levels of arsenic in baby rice cereal are much higher than other infant cereals, according to a recent study.. And, some are higher than FDA recommendations.. Healthy Babies Bright Futures, an advocacy group working to reduce toxins in a babys environment, tested 105 cereals nationwide for arsenic contamination. The group found arsenic levels in infant rice cereal averaged six times higher than in oatmeal, multi-grain, quinoa and other non-rice infant cereals, in a non-peer reviewed study published online this week.. The group is calling on the U.S. Food and Drug Administration to more strictly regulate arsenic levels in baby food. The toxin is associated with developmental defects, cardiovascular disease, neurotoxicity, diabetes and even cancer, according to the World Health Organization.. In 2016, the FDA proposed a recommendation of no more than 100 parts per billion of arsenic in infant cereal. That recommendation isnt requirement. (To put that in perspective, the Environmental Protection ...
Inorganic arsenic contamination of rice is a problem that has plagued rice supplies worldwide because rice is particularly effective at pulling metals out of soil. And it has not helped that millions of pounds of lead-arsenate and calcium-arsenate pesticides have been sprayed across many countries fields and orchards. In the United States especially, calcium arsenate was heavily sprayed on cotton crops, whose fields are highly contaminated with inorganic arsenic which in turn seeps into neighboring rice fields. Is it any surprise, then, that we have an arsenic problem in rice today? We truly do reap what we sow.. Classified as a human carcinogen, arsenic is particularly nasty at higher doses and inorganic arsenic is far worse than organic arsenic. But at very low doses arsenic actually has a hormetic effect, strengthening the organism to which it has been exposed. The CCCF, though, is concerned with levels of inorganic arsenic that will adversely affect human health.. Japan launched the ...
About Arsenic== Arsenic is the 33rd element which symbol is As in the periodic table and is a chemical element found in many mineral or in pure crystal forms. ,br> It is or was used in many industrial sectors as chemistry, electronics, metalworking, military, pharmaceutical, phytosanitary, mining, and others. ,br> Arsenic is also found in ground water, soil, air due to industrial or geological pollution and is found in many different forms and is often conjugated with sulfur and others metal.,br> Almost all arsenic products are toxic but the inorganic ones are more dangerous. The AsO3, also called arsenic trioxide or arsenite, is one of the most common form in the environment because of its important production in industry (around 50000 tones per year). Its also a soluble form which thus can be ingested by drinking water which contain some. It explains why its one of the most toxic form (until 500 times more toxic than pure arsenic). ,br>,br> Acute intoxication is caused by ingestion of a ...
The Associated Press has announced that the FDA at long last gave prove that the chickens that got the medication were really positive for inorganic arsenic on tests.. Despite the fact that this has been overlooked for quite a while, the FDA has at last chosen to report that the chicken meat we as a whole purchase from the stores in the U.S. contains arsenic, which is a to a great degree lethal compound which prompts to different medical problems, malignancy, and even demise.. However, the most irritating certainty is that the arsenic is quite placed in chicken.. In particular, in 2006, the IATPs report Playing Chicken: Avoiding Arsenic inside the meat you eat, demonstrated that even 70 percent of the chickens in the U.S are nourished with arsenic keeping in mind the end goal to help the weight pick up and to get the ordinary sound shading on account of pigs, chickens, and turkeys.. The FDA found that half of all chickens have assimilated this poison inside the liver.. The organization even ...
Define Arsenic(III) oxide. Arsenic(III) oxide synonyms, Arsenic(III) oxide pronunciation, Arsenic(III) oxide translation, English dictionary definition of Arsenic(III) oxide. n. A poisonous, white amorphous powder, As2O3, used in insecticides, rat poisons, weed killers, pigments, and preservatives for hides and wood.
We,China Arsenic(III) iodide Suppliers and China Arsenic(III) iodide Manufacturers, provide Arsenic(III) iodide product and the products related with China Arsenic(III) iodide - mvlaboratories
According to Foods Matter in their article Rice and Arsenic - what is going on?, some countries and locations have higher arsenic levels than others. Heres where I have to eat crow. As an known opponent to Chinese Food it appears that China has actually set into place a plan to limit the arsenic levels in rice, probably because of their higher consumption of rice in general. The above article states that the safest places to obtain your rice from are: Indian, Pakistani, Nepalese, Chinese, Egyptian, Thai and the worst places: American, European (esp. Italian & French), Bangladeshi. The American delima seems to be that we often grow rice on former Cotton fields where the source of arsenic in the soil seems to be the pesticides used on the former cotton crop. One option offered, with the second article in the above article series, was to suggest breeding a rice that did not take up as much arsenic. WOW, isnt messing with Gods created product and the possible reason many today cant eat wheat? ...
Children are more likely to be exposed to harmful levels of arsenic from play structures, picnic tables and decks than from drinking water according to a recent Environmental Working Group (EWG) study. "We know that arsenic in drinking water is dangerous for kids, but what we found was that the arsenic in lumber is an even greater risk," said EWG analyst Renee Sharp. "In less than ten days, an average five year old playing on an arsenic-treated playset would exceed the lifetime cancer risk considered acceptable under federal pesticide law." The report, entitled "Poisoned Playgrounds," is based on analysis of data from 180 samples of treated wood taken across the U.S. and an extensive review of scientific literature.. Virtually all of the lumber sold for outdoor use in the U.S. is pressure-treated and injected with toxins that act as preservatives and pesticides. Chromated copper arsenate (CCA) is the most common wood preservative used in the U.S., containing 22% pure arsenic. Arsenic is an acute ...
Arsenic, a natural occurring element in the geology of many regions, is an important contaminant of well water to look out for. The map above shows wells sampled across the country and their arsenic concentration levels. The EPAs maximum contaminant level is strictly set for public health concerns at 10 micrograms per liter. Local … Continue reading Arsenic Contamination of Well Water: A Real Issue ...
Arsenic is found in waters in many parts of the UK. It is present in underground rocks and percolates into the ground water and then up through boreholes or springs into the water supply.. Arsenic compounds are toxic even at low levels. They can cause skin and liver disorders, circulatory problems and can be life threatening. The European Union has looked at the Arsenic levels in water and reduced the allowable limit to below 10ug/l (from 50ug/l).. The arsenic can be removed with a specially formulated filter media called Bayoxide. The media is strong, reliable and easy to handle. Bayoxide is regulation 31 approved (DWI) for use in both Municipal and Private water use.. ...
Fluoridation chemicals are allowed to contain arsenic and other toxins New York - March 2007 - Trace amounts of arsenic are found in fluoride chemicals added to drinking water supplies, reports the U.S. Centers for Disease Controls (CDC) website. (1). Fluoridation is a controversial attempt to reduce tooth decay in tap-water consumers.. Fluoridation chemicals - sodium fluoride, sodium fluorosilicate, and fluorosilicic acid (FSA) are all derived from the manufacture of phosphate fertilizer, reports the CDC. Trace amounts of unwanted contaminants, such as antimony, barium, beryllium, arsenic and others, are allowed to remain in fluoridation chemicals before flowing through Americas faucets (2). The CDC reports, tests by National Sanitation Foundation (NSF) revealed arsenic was present in sample batches of FSA. When trace amounts were present, the treated water had an average of 0.43 parts per billion (ppb) of arsenic, with a high of 1.66 ppb attributable to the fluoride additive. (2). The NSF ...
The committee also identified several factors that could affect susceptibility to inorganic arsenic, including life stage when exposure occurs, genetic factors, sex, nutritional deficiencies, health status, smoking or alcohol consumption, or exposures to mixtures of chemicals. Based on the degree of evidence concerning these vulnerability factors, consideration should be given to whether dose-response analyses should focus on the population as a whole or involve separate assessments for the susceptible groups, the report says. In particular, consideration should also be given to early-life exposure and the risk of adverse health effects later in life, the report adds. EPAs current approach of assessing partial-lifetime exposures by prorating the risk equally regardless of age needs to be critically evaluated to determine whether it is appropriate for assessing inorganic arsenic ...
From our show, youve heard about high arsenic levels in apple juice. Now, a new report sheds light on arsenic levels in another food: rice.
Arsenicals are relatively weak poisons and the sisters being aware of this used two poisons, strychnine and cyanide, which dwarf arsenicals in their effectiveness. (1) Even though arsenic wasnt the agent of death arsenic and old lace has a much nicer artistic ring to it then strychnine and old lace or cyanide and old lace. Regardless, arsenic is a much feared material, resulting in what Ralph Zangaro calls arsenophobia. (2). No debate arsenic is a poison, but it has been used medicinally for more than 3000 years to treat human illnesses, including infectious diseases and malignancies. In recent times, Chinese researchers reported that arsenic trioxide induced remissions in patients with promyelocytic leukemia, a cancer of the blood, including those who had relapsed after other prior therapy. (3) In another report concerning a long-term study in China, doctors may appear to have safely and successfully treated patients with cancer of the blood and bone marrow with a combination of arsenic ...
BioMed Research International is a peer-reviewed, Open Access journal that publishes original research articles, review articles, and clinical studies covering a wide range of subjects in life sciences and medicine. The journal is divided into 55 subject-specific sections.
The congress "Arsenic in the Environment" offers an international, multi- and interdisciplinary discussion platform for arsenic research aimed at practical solutions of problems with considerable social impact, as well as focusing on cutting edge and breakthrough research in physical, chemical, toxicological, medical and other specific issues on arsenic on a broader environmental realm. The congress "Arsenic in the Environment" was first organized in Mexico City (As 2006) followed by As 2008 in Valencia, Spain and As 2010 in Tainan, Taiwan. The 4th International Congress As 2012 was held in Cairns, Australia from July 22-27, 2012 entitled Understanding the Geological and Medical Interface of Arsenic. The session topics comprised: 1. Geology and hydrogeology of arsenic; 2. Medical and health issues of arsenic; 3. Remediation and policy; 4. Analytical methods for arsenic; and 5. Special topics on "Risk assessment of arsenic from mining", "Geomicrobiology of arsenic", "Geothermal arsenic", "Rice ...
A Stuckey et al. (2015) paper looked into the release of arsenic from sediments in the Mekong Delta in Vietnam. The researchers looked at the quality of carbon and its effect on arsenic release in the sediment profile. They also studied reactions in both seasonally saturated wetlands-inundated only through part of the year-and in permanent wetlands. In these wetlands, arsenic was released by bacteria consuming it for respiration in the absence of oxygen, using carbon as fuel. The source of carbon powering the microbes is organic matter on the earths surface.. In this study, the only place where arsenic was released naturally was in the near surface sediments of permanent wetlands. This is because of the carbon on the surface as well as the amount of oxygen available for degradation. In seasonally saturated wetlands arsenic is not released because organic matter has been consumed in aerobic (oxygenated) processes and there is nothing left for the bacteria to eat. However, in permanently ...
Results for arsenic in groundwater (arsenic contamination) equipment from AdEdge, Apyron, ATOMISOL and other leading brands. Compare and contact a supplier near you on (health and safety) - Environmental XPRT
The article explains why it was that standards of proof that were acceptable to different degrees to geologists, physicists and biologists were unacceptable to chemists. The answer pertains to what we call "background knowledge". In this case, chemists were compelled to ask how DNA with arsenic replacing phosphorus in its backbone could possibly be stable given everything they knew about the instability of arsenate esters. The latter had been studied for several decades, and while arsenic DNA itself had not been synthesized before, simpler arsenate esters were known to be highly unstable in water. The chemists were quite confident in extrapolating from these simple cases to questioning the stable existence of arsenic DNA; if arsenic DNA indeed were so stable, then almost everything they had known about arsenate esters for fifty years would have been wrong, a possibility that was highly unlikely. Thus for chemists, arsenic DNA was an extraordinary claim. And as Carl Sagan said, they needed to see ...
Though the levels of arsenic found were still below the safety threshold set by the Food and Drug Administration, researchers pointed out that these levels were established in the 1940s. The chicken samples tested were from chickens bred in 2010 and 2011, and since that time the sales of roxarsone, an organic compound used in poultry known to contribute to elevated arsenic levels, has been suspended. However, this drug has not been banned and is still being used abroad. ...
A recent study done at Queens University (1) in Belfast found high levels of illegal, inorganic arsenic in many baby rice food products. A professor at the university stated, "this research has shown direct evidence that babies are exposed to illegal levels of arsenic despite the EU regulation to specifically address this health challenge. Babies are particularly vulnerable to the damaging effects of arsenic that can prevent the healthy development of a babys growth, IQ and immune system to name but a few." Babies require constant care and appropriate nutrients to aid healthy growth, but if youre feeding them harmful things such as inorganic arsenic, they could cause a range of health problems in the future such as developmental problems, heart disease, diabetes and nervous system damage. ...
Potential for contamination: Since organic arsenic is found in rice, theoretically, some brown rice proteins might contain some arsenic. Luckily, this issue is very easy to avoid, especially in a product like rice protein powder. Organic arsenic is water soluble, and can easily be washed away in the processing required to turn the rice into rice protein powder. Additionally, reputable companies will test their final product to ensure that levels of arsenic are well below the threshold for potential negative effects. When in doubt, contact the manufacturer of a protein powder and ask them about their testing standards. Also keep in mind that trace amounts of arsenic are found in many foods, and in low levels, it is not harmful. Arsenic is a naturally occurring element that is in soil, water, and air; it is mainly the inorganic arsenic (the kind you might find in rat poison) that should cause alarm ...
Feb 05, 2001· GAO reviewed the Environmental Protection Agencys (EPA) new rule on national primary drinking water. GAO noted that (1) the rule would establish, among other things, a health-based, non-enforceable Maximum Contaminant Level Goal for arsenic of zero and an enforceable Maximum Contaminant Level for arsenic of 0.01 mg/l and (2) EPA complied with the applicable requirements in promulgating the rule. ...
...Arsenic exposure appears to continue causing lung and bladder cancer d...Arsenic is a known cause of lung and bladder cancer but researchers d...Guillermo Marshall Ph.D. of Pontificia Universidad Catlica de Chile ...Lung and bladder cancer mortality rates in the area with arsenic-conta...,Lung,and,bladder,cancer,deaths,continue,decades,after,arsenic,exposure,biological,biology news articles,biology news today,latest biology news,current biology news,biology newsletters
Last year a news report looked at arsenic in rice and it generated lots of concerns. Now the Food and Drug Administration (FDA) has issued a follow-up report that indicates that the levels of inorganic arsenic, the toxic form of arsenic, are too low to cause immediate health damage.. The FDA tested more than 1300 samples of rice and rice products and found a range in the amount of arsenic in the samples. In rice grains, the range was from 2.6 to 7.2 micrograms/servings, with instant rice having the lowest amount and brown rice the highest. When it comes to rice based foods the range was from 0.1 to 6.6 micrograms per serving, with infant formula at the low end and rice pasta at the high end.. While the FDA plans to continue assessing the health risks of rice consumption over a long period of time they do have some current recommendations.. The FDA recommends that - * Consumers focus on a well balanced eating plan - get plenty of fruits, vegetables, lean protein, dairy and grain foods.. * Choose ...
We recently heard from Fred who asked, "What is the detection limit for your Arsenic in Water Test by National Testing Laboratories product? Is there any discount for ordering multiple tests? I want to test my incoming city water and water after RO treatment.". Good afternoon, Fred, and thank you for the inquiry... The minimum detection limit for the Arsenic Test by National Testing Laboratories is 5ppb (also written as .005ppm and .005 mg/L). The USEPA has set the acceptable limit for arsenic in public water systems at 10ppb.. Regarding discounts for additional test kits, we offer a discount of 5% for quantities of 3 to 10 of the kits. You can find a link to bulk pricing on the product page ( http://www.watertestkitstore.com/arsenic-in-water-test-by-national-testing-laboratories/) under the add to cart button.. What is arsenic and where does it come from?. Arsenic occurs naturally in the environment and may show up in both public and private water supplies. Levels of arsenic occurring ...
When in contact with active metals such as arsenic, iron, aluminum, zinc, or when heated to decomposition, it emits highly toxic fumes of arsenic. Upon contact with water hydrogen chloride is produced. Water causes it to decompose to yield arsenic acid and hydrochloric acid. Avoid active metals such as arsenic, iron, aluminum, zinc, decomposed by water to form arsenic hydroxide and hydrogen chloride. Avoid air, ultraviolet light. Hazardous polymerization may not occur ...
Arsenic is a highly dangerous compound that can cause cancer if consumed in high amounts. FDA has now revealed what most industry watchers have seen believed, they have stated that chicken meat may contain this compound because of the arsenic rich chicken feed used by poultry farmers. For quite a long time critics of this form of chicken feed had expressed their concerns, but were told by leading scientists backed by the manufacturers of these feeds, that the arsenic is excreted by the chickens and present in their feces.. This is what has been claimed for decades now, but officially the FDA has proven this belief to be false and they have in fact stated that the arsenic rich chicken feeds, leave traces of arsenic in the meat of the bird. Some chicken feed manufacturers like Pfizer have taken their brand of chicken feed off the shelves of major stores in the United States, one such product is Roxarsone. While this product is actually produced by a subsidiary of Pfizer known as Alpharma LLC, the ...
1: 1/ r; L, H 00 M, L. O. UPTON Oct. 5, 1965 INFRA-RED TRANSMITTING FIBERS FORMED OF ARSENIC AND SULPHUR WM-M. Filed Feb. 15, 1960 4 Sheets-Sheet 1 INVENTOB I LEE 0. UPTON HTTOQNEY L. O. UPTON Oct. 5, 1965 INFRA-RED TRANSMITTING FIBERS FORMED OF ARSENIC AND SULPHUR Filed Feb. 15 1960 4 Sheets-Sheet 2 INVENTOE LEE 0. UPTON HTTO/ZN E Y Oct. 5, 1965 1.. o. UPTON 3,209,641 INFRA-RED TRANSMITTING FIBERS FORMED OF ARSENIC AND SULPHUR Filed Feb. 15, 1960 4 Sheets-Sheet s H illLll .l /5 l6 27 27 8/ 26 2e 0 m2. 5031K m2 /o/ mm 92 3 r 90 96 a9 94 2 :1 a8 93 95 95 9 l E B 2 3 Q P: o N 0 z466,0,z,4l6 WAVELENGTH IN MICRONS INVENTOE ,zf gs LEE 0. UPTON ATTORNEY L. O. UPTON Oct. 5, 1965 INFRA-RED TRANSMITTING FIBERS FORMED OF ARSENIC AND SULPHUR Filed Feb. 15. 1960 4 Sheets-Sheet 4 INVENTOR LEE 0. UPTON YZyA QTTOENEY United States Patent 3,209,641 INFRA-RED TRANSMITTING FIBERS FORMED OF ARSENIC AND SULPHUR Lee 0. Upton, Sturbridge, Mass., assignor to American Optical Company, Southbridge, Mass., a voluntary ...
The saga of arsenic life appears to be finally coming to a close. Two papers out in Science this week put under the microscope the claim that the bacterium could incorporate arsenic into its DNA in place of phosphorus. And the two teams found no evidence that the bacteria could make use of arsenic.. When the arsenic life story kicked off back in December 2010, it was big news. (You can read our coverage of it here, here and here.) The discovery by a Nasa team led by Felisa Wolfe-Simon that a bacterium could make use of an exotic element not normally used by life cracked open the door an inch to the idea that there could be life on more planets than ever thought possible. After all, if we could find bacteria thriving in the arsenic laced lakes of California, then surely they could be eking out a living on inhospitable planets.. However, some researchers were less than impressed with the science and they took to social media channels to register their concerns with the paper, with Nasa and with ...
Arsenic exposure[edit]. Because of the ubiquity of arsenic in ground water supplies and its effect on cardiovascular health, ... atsdr-medical management guidelines for arsenic trioxide *^ Arsenic Author: Frances M Dyro, MD, Chief of the Neuromuscular ... Arsenic exposure has also many of the same signs of primary hypertension such as headache, somnolence, [57] confusion, ... low dose arsenic poisoning should be inferred as a part of the pathogenesis of idiopathic hypertension. Idiopathic and ...
Arsenic Essential in rat, hamster, goat and chicken models, but no biochemical mechanism known in humans.[38] arsenic poisoning ... Anke M. Arsenic. In: Mertz W. ed., Trace elements in human and Animal Nutrition, 5th ed. Orlando, FL: Academic Press, 1986, 347 ... In: Chappell W.R, Abernathy C.O, Cothern C.R. eds., Arsenic Exposure and Health. Northwood, UK: Science and Technology Letters ... IN: Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Chromium, Iodine, Iron, Manganese, Molybdenum ...
Arsenic Before AD 815 Before AD 815 Middle-Eastern alchemists Middle East The use of metallic arsenic was described by the ... Roza, Greg (2010). The Nitrogen Elements: Nitrogen, Phosphorus, Arsenic, Antimony, Bismuth. p. 7. ISBN 9781435853355. .. ... "We find in his writings [...] preparation of various substances (e.g., basic lead carbonatic, arsenic and antimony from their ... Egyptian alchemist Zosimos.[26] The purification of arsenic was later described by Persian alchemist Jabir ibn Hayyan.[27] ...
arsenic 33 As selenium 34 Se bromine 35 Br krypton 36 Kr ...
Arsenic Arsolane Arsole Bismuth Bismolane Bismole Boron Borolane Borole Nitrogen Pyrrolidine ("Azolidine" is not used) Pyrrole ...
Arsenic As 10μg/l 10 μg/l 10μg/l 50μg/l 10.0 μg/l ...
arsenic: arsine (note 'arsane' is the IUPAC recommended name). *antimony: stibine (note 'stibane' is the IUPAC recommended name ...
Arsenic33As​74.922 Sele-nium34Se​78.971 Bromine35Br​79.904 Kryp-ton36Kr​83.798 ...
"Arsenic". History Magazine.. *^ "From the Monthly Notices of the Royal Astronomical Society 70, 517-526, 645 (Errata) (1910) By ... The Marsh test for detecting arsenic poisoning is developed by James Marsh.[35] ...
Arsenic. 6993260000000000000♠260×10−9. 0.000007. 6992890000000000000♠8.9×10−8. Possibly[1][8]. toxic in higher amounts. 15 ... a b Anke M. "Arsenic". In: Mertz W. ed., Trace elements in human and Animal Nutrition, 5th ed. Orlando, FL: Academic Press, ... Arsenic essentiality and factors affecting its importance. In: Chappell W. R., Abernathy C. O., Cothern C. R. eds., Arsenic ... There is evidence that arsenic, an element normally considered a toxin in higher amounts, is essential in ultratrace quantities ...
Arsenic. Dezincification resistant brass with a small percentage of arsenic. Delta metal. 55. 41-43. 1-3% iron with the balance ... Arsenic; frequently aluminum. Used for boiler fireboxes. Cartridge brass (C260). 70. 30. -. ≤ 0.07[29]. Good cold working ... antimony and arsenic with an unusually large amount of silver, ranging from 22.5% in the base to 5.76% in the pan below the ... both bronze and brass may include small proportions of a range of other elements including arsenic, lead, phosphorus, aluminum ...
Arsenic: used in making electrical circuits, as an ingredient in pesticides, and as a wood preservative. It is classified as a ...
For instance, arsenic, which is only 14.5% less dense than antimony, has nearly 59% more specific heat capacity on a mass basis ... In other words; even though an ingot of arsenic is only about 17% larger than an antimony one of the same mass, it absorbs ... In other words, similar-sized atoms would cause a mole of arsenic to be 63% larger than a mole of antimony, with a ... the departure from the correlation to simple volumes in this case is due to lighter arsenic atoms being significantly more ...
... arsenic, selenium, antimony, tellurium, and polonium (of which germanium, arsenic, antimony, and tellurium are usually ... Arsenic is a moderately hard (MH 3.5) and brittle semi-metallic element. It is commonly regarded as a metalloid, or by some ... Greenwood and Earnshaw[193] refer to the B-subgroup metals as post-transition elements: 'Arsenic and antimony are classed as ... It has a relatively open and partially covalent crystalline structure (BCN 3+3). Arsenic forms covalent bonds with most other ...
It is commonly available without a prescription in various dosage forms, such as a topical cream, ointment, or vaginal suppository. It is also available as an oral troche or throat lozenge as a prescription only. Topically, clotrimazole is used for vulvovaginal candidiasis (yeast infection) or yeast infections of the skin. For vulvovaginal candidiasis (yeast infection), clotrimazole tablets and creams are inserted into the vagina. Topical clotrimazole is usually not effective in treatment of fungal infections of the scalp or nails.[citation needed] When using over-the-counter drug clotrimazole products, use should be discontinued if condition does not improve after treatment for 2 weeks for jock itch or after 4 weeks for athlete's foot or ringworm.[6] Throat lozenge preparations are used for oropharyngeal candidiasis (oral thrush) or prevention of oral thrush in people with neutropenia.[6] Clotrimazole is usually used 5 times daily for 14 days for oral thrush, twice daily for 2 to 8 weeks for ...
... (trade names Oxistat in the US, Oxizole in Canada) is an antifungal medication typically administered in a cream or lotion to treat skin infections, such as athlete's foot, jock itch and ringworm. It can also be prescribed to treat the skin rash known as tinea versicolor, caused by systemic yeast overgrowth (Candida spp.). ...
Arsenic production. 1. 2006. Bismuth production, 1,900 tons. 1. 2006. Cadmium production, 3,000 tons. 1. 2005. ...
Morinaga milk arsenic poisoning (ja)[27][28]. Powdered milk. arsenic. Japan. 13,389. ,600. By mistake, an industrial grade ... arsenic trioxide. England. 000200 !~200. 020 !20. Arsenic was accidentally sold as "daft". Daft was a standard adulterant to ... "Chapter - 3 The arsenic milk poisoning incident". archive.unu.edu. Retrieved 2017-06-21.. ... "Long-term consequences of arsenic poisoning during infancy due to contaminated milk powder". Environmental Health. 5: 31. doi ...
... has been used for decades in the food industry as a hurdle to fungal outgrowth in dairy products and other foods. Potential advantages for the usage of natamycin might include the replacement of traditional chemical preservatives, a neutral flavor impact, and less dependence on pH for efficacy, as is common with chemical preservatives. It can be applied in a variety of ways: as an aqueous suspension (such as mixed into a brine) sprayed on the product or into which the product is dipped, or in powdered form (along with an anticaking agent such as cellulose) sprinkled on or mixed into the product. While not currently approved for use on meats in the United States, some countries allow natamycin to be applied to the surface of dry and fermented sausages to prevent mold growth on the casing. Also, natamycin is approved for various dairy applications in the United States. More specifically, natamycin is commonly used in products such as cream cheeses, cottage cheese, sour cream, yogurt, ...
... is found primarily in sour milk products, such as koumiss, laban, yogurt, kefir, and some cottage cheeses. The casein in fermented milk is coagulated (curdled) by lactic acid. Lactic acid is also responsible for the sour flavor of sourdough bread. In lists of nutritional information lactic acid might be included under the term "carbohydrate" (or "carbohydrate by difference") because this often includes everything other than water, protein, fat, ash, and ethanol.[37] If this is the case then the calculated food energy may use the standard 4 calories per gram that is often used for all carbohydrates. But in some cases lactic acid is ignored in the calculation.[38] The energy density of lactic acid is 362 kilocalories (1,510 kJ) per 100 g.[39] In beer brewing some styles of beer (sour beer) purposely contain lactic acid. Most commonly this is produced naturally by various strains of bacteria. These bacteria ferment sugars into acids, unlike yeast, which ferment sugar into ethanol. One ...
Cameron, Driffield (1998-01-03). "Arsenic Lake Property". Burlington, Ontario: Geological Association of Canada: 5, 6. AFRI ...
A number of scholars/reformers[67][68] have suggested that traditional hudud penalties "may have been suitable for the age in which Muhammad lived" but are no longer,[67] or that "new expression" for "the underlying religious principles and values" of Hudud should be developed.[68] Tariq Ramadan has called for an international moratorium on the punishments of hudud laws until greater scholarly consensus can be reached.[69] Hudud punishments have been called incompatible with international norms of human rights and sometimes simple justice. At least one observer (Sadakat Kadri) has complained that the inspiration of faith has not been a guarantee of justice, citing as an example the execution of two dissidents for "waging war against God" (Moharebeh) in the Islamic Republic of Iran-the dissidents waging war by organizing unarmed political protests.[70][71] The Hudood Ordinance in Pakistan led to the jailing of thousands of women on zina-related charges, were used to file "nuisance or harassment ...
Arsenic pentafluoride - AsF5. *Arsenic trioxide (Arsenic(III) oxide) - As2O3 ...
"Arsenic and Old Papers". Dinosaur Mailing List Archives. Cleveland Museum of Natural History. Retrieved 2007-07-29 ...
33 As arsenic (gray) use. 887 K. subl. 614 °C. 1137 °F ...
Exposure to arsenic can also cause cancer. Workers may be harmed from exposure to arsenic. The level of exposure depends upon ... Arsenic can be harmful to the eyes, skin, liver, kidneys, lungs, and lymphatic system. ... Arsenic (As) is a white to gray, brittle solid. It occurs naturally in water and soil. ... NLM TOXNET: Arsenic, Elementalexternal icon. *NTP Report on Carcinogens, Fourteenth Edition: Arsenic and Inorganic Arsenic ...
Arsenic can be in food, soil, and water. Low levels will probably not hurt you, but higher levels can cause problems. Learn ... Arsenic (World Health Organization) Also in Spanish * Arsenic (Environmental Health Student Portal) (National Library of ... Arsenic is a natural element found in soil and minerals. Arsenic compounds are used to preserve wood, as pesticides, and in ... Article: Arsenic contamination assessment in Brazil - Past, present and future concerns:... * Article: Arsenic in a groundwater ...
How can arsenic affect my health?. Because arsenic is a natural part of the environment, low levels of arsenic are present in ... Arsenic Arsenic Arsenic has been found in at least 781 of 1,300 National Priorities List sites (hazardous waste sites) ... How does arsenic enter the environment?. It is present in the air as dust from industrial output, burning of arsenic containing ... How might I be exposed to arsenic?. If you live in an area with naturally high levels of arsenic or near a hazardous waste site ...
ARSENIC PENTOXIDE. ICSC. : 0377. Arsenic (V) oxide. Arsenic acid anhydride. Arsenic anhydride. Diarsenic pentoxide. April 2013 ... Decomposes above 300°C . This produces toxic fumes (arsenic trioxide - see ICSC 0378) and oxygen. The solution in water is a ... The recommendations on this Card also apply to inorganic pentavalent arsenic compounds (arsenates). ...
ARSENIC TRIOXIDE. ICSC. : 0378. Arsenic(III)oxide. Arsenous oxide anhydride. White arsenic. Arsenous acid anhydride. Diarsenic ... This produces toxic fumes of arsenic oxides. It reacts with metals. This generates fire and explosion hazard. Formula: As2O3. ... The recommendations on this Card also apply to inorganic trivalent arsenic compounds (arsenites). ...
See an archive of all arsenic stories published on the New York Media network, which includes NYMag, The Cut, Vulture, and Grub ... Your Gluten-Free Diet Probably Exposes You to a Bunch of Arsenic and Mercury. A new study suggests its an "unintended ... New studies contradict existence of arsenic-loving bacteria. By Dan Amira @media (min-width: 0px) and (max-width: 599.9px) { . ...
Arsenic poisoning, harmful effects of various arsenic compounds on body tissues and functions. Arsenicals are used in numerous ... Arsenic is contained in many items used around the house. Both odourless and tasteless compounds of arsenic are found in some ... Arsenic poisoning, harmful effects of various arsenic compounds on body tissues and functions. Arsenicals are used in numerous ... and when eaten may cause arsenic poisoning. The brown alga Hizikia. , for example, contains sufficient arsenic to be used as a ...
High levels of arsenic in groundwater have poisoned thousands of people and may affect millions more. Only now is the true ... High levels of arsenic in groundwater were once believed to be confined to an area around the river delta, and Bangladesh in ... THE growing trend around the world to drink water from underground sources is causing a global epidemic of arsenic poisoning. ...
Urinary arsenic analysis is the most common method used worldwide for assessing the arsenic contamination of a population. In ... established the proficiency in arsenic speciation program to help laboratories worldwide assess the accuracy of their arsenic ... Arsenic in drinking water has been recognized for many decades in some regions of the world. People in these areas use ... This water can become contaminated from naturally-occurring sources of arsenic and/or human activities. ...
The admitted point was to pressure the U.S. Food and Drug Administration into setting a safety standard for arsenic in the ... Consumer Reports released a report of independent laboratory tests that found inorganic arsenic in some 200 rice products ... In other words, its not nearly as risky to us as arsenic in its inorganic forms. As I wrote in a post titled, Is Arsenic the ... Inorganic arsenic - as an example, the very poisonous compound arsenic trioxide (As2O3) is notably carbon free. And this ...
Garlic combats arsenic poisoning. Garlic may provide some relief for millions of Bangladeshis and Indians whose drinking water ... Rats which were also fed garlic extracts had 40 per cent less arsenic in their blood and liver, and passed 45 per cent more ... Keya Chaudhuri of the Indian Institute of Chemical Biology in Kolkata, and her colleagues gave rats daily doses of arsenic in ... Chaudhuri says that sulphur-containing substances in garlic scavenge arsenic from tissues and blood. She advises people in at- ...
Organic arsenic compounds exist mainly in fish and shellfish.. In the past people used inorganic forms of arsenic in pesticides ... Exposure to organic arsenic compounds happens when people eat seafood. These forms of arsenic are considered to be non-toxic or ... By measuring arsenic in urine, scientists can estimate the amount of arsenic that has entered peoples bodies within the past ... How Arsenic Affects Peoples Health. Unusually large doses of inorganic arsenic can cause symptoms ranging from nausea, ...
A class action lawsuit in California claims that some of the Golden States wines are contaminated with arsenic that far exceed ... Arsenic is a potent poison and the government has a limit on it in water but not in wine. The feds limit arsenic in water to ... A class action lawsuit in California claims that some of the Golden States wines are contaminated with arsenic that far exceed ... The lawsuit says the wineries "produce and market wines that contain dangerously high levels of inorganic arsenic, in some ...
One major initiative for addressing the arsenic problem is the Bangladesh Arsenic Mitigation Water Supply Project (BAMWSP), run ... Laced With Arsenic. Poisoned Waters. Bangladesh, Desperately Seeking Solutions Bangladesh has both too much water and not ... Arsenic poisoning at the levels were seeing in Bangladesh will take 10 or 20 years off a persons life, without any doubt. ... Moreover, arsenic-contaminated water is not limited to Bangladesh, and the scientific work now under way-if it is allowed to ...
Exposure to Arsenic. Since arsenic is found naturally in the environment, you will be exposed to some arsenic by eating food, ... Arsenic combined with these elements is called inorganic arsenic. Arsenic combined with carbon and hydrogen is referred to as ... Elemental arsenic (sometimes referred to as metallic arsenic) is a steel grey solid material. However, arsenic is usually found ... Smelters may collect this dust and take out the arsenic as a compound called arsenic trioxide (As2O3). However, arsenic is no ...
Arsenic has been found at 1,014 of the 1,598 National Priority List sites identified by the Environmental Protection Agency ( ... At high levels, inorganic arsenic can cause death. Exposure to lower levels for a long time can cause a discoloration of the ... Exposure to higher than average levels of arsenic occurs mostly in the workplace, near hazardous waste sites, or in areas with ... What is arsenic?. Arsenic is a naturally occurring element widely distributed in the earths crust. In the environment, arsenic ...
The arsenic trioxide was held, and succimer was initiated as a chelating agent for suspected arsenic toxicity. Blood and urine ... Gastrointestinal side effects from arsenic poisoning are common and well described. Symptoms of acute arsenic toxicity include ... B. Katzung, "Arsenic," in Basic and Clinical Pharmacology, p. 949, McGraw-Hill, New York, NY, USA, 2007. View at Google Scholar ... One week later, arsenic therapy was reintroduced at a dose of 0.1 mg/kg/day. On day 14 of therapy, the patient developed mental ...
In the environment, arsenic is combined with oxygen, chlorine, and sulfur to form inorganic arsenic compounds. Arsenic in ... Arsenic News and Research. RSS Arsenic is a naturally occurring element widely distributed in the earths crust. ... Combination of arsenic and existing leukemia drug may combat cancer Investigators have discovered that arsenic in combination ... Breathing high levels of inorganic arsenic can give you a sore throat or irritated lungs. Ingesting very high levels of arsenic ...
The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database ...
... arsenic pentoxide, arsenic v oxide, arsenic anhydride, arsenic v pentoxide, arsenic pentaoxide, arsenic oxide, diarsenic ... arsenic, inorganic, arsenic-75, arsen, gray, grey, black, metallic, compounds, colloidal PubChem CID: 5359596 ChEBI: CHEBI: ... arsenic, inorganic, arsenic-75, arsen, gray, grey, black, metallic, compounds, colloidal PubChem CID: 5359596 ChEBI: CHEBI: ... Arsenic(III) oxide, primary standard, ACS, 99.95-100.05%, Alfa Aesar™. CAS: 1327-53-3 Molecular Formula: As2O3 MDL Number: ...
Arsenic Trioxide Injection: learn about side effects, dosage, special precautions, and more on MedlinePlus ... Before receiving arsenic trioxide injection,. *tell your doctor and pharmacist if you are allergic to arsenic trioxide, any ... Talk to your doctor about using birth control to prevent pregnancy during your treatment with arsenic trioxide. Arsenic ... Arsenic trioxide comes as a solution (liquid) to be injected into a vein by a doctor or nurse in a medical office or clinic. ...
The group urges FDA to set strict safety guidelines for arsenic and lead in juice and other foods. ... of store-bought apple and grape juice has more arsenic, and 25% has more lead, than the EPA allows in water, Consumer Reports ... Total arsenic isnt the point, however. Organic arsenic isnt currently considered dangerous. But inorganic arsenic is deadly ... Reducing Arsenic Risk. Here is advice from Consumer Reports for reducing arsenic risk:. *Test your water if you get it from a ...
ARSENIC IN ULCERATIVE ENDOCARDITIS. Br Med J 1922; 2 doi: https://doi.org/10.1136/bmj.2.3217.402-b (Published 26 August 1922) ...
Arsenic is chemically similar to phosphorous, but its also toxic. The idea that arsenic could replace one of the basic ... Arsenic Life Discovery Refuted. New findings published in Science this week all but refutes a paper, published in 2010, that ... Instead of using arsenic in place of phosphorous, the scientists say, the bacteria simply can tolerate extremely high ... But though it doesnt represent an alien form of life, the microbe manages to survive in a hostile, arsenic-rich environment. ...
Arsenic contamination is a big threat to a huge population of in the Gangetic plains.of Bihar.Most of the mitigation intiatives ... Arsenic Toxicity and Obstetric Outcome Arsenic Toxicity and Obstetric Outcome Arsenic in drinking water = 630 μg/L Arsenic in ... Arsenic In Ground Water Of Bihar * 1. Arsenic Contamination in Ground Water of Bihar ,India Arsenic Mitigation: The Way Forward ... Arsenic Contamination in Ground Water by SK Emamul Haque 3118 views * Arsenic Poisoning in Bihar - Proble... by Ashok Ghosh ...
  • These reference values help experts determine if people have been exposed to higher levels of arsenic than are found in the general population. (cdc.gov)
  • Moreover, a scientific survey commissioned by Consumer Reports -- using CDC survey data -- found that people who reported drinking apple juice or grape juice have about 20% higher levels of arsenic in the urine than those who didn't drink juice. (webmd.com)
  • After following participants for up to about seven years, the researchers found that those with higher levels of arsenic were more likely to have thickening of the left ventricle. (reuters.com)
  • Among participants with higher blood pressure levels - above 120/80 - or those using blood-pressure lowering drugs, the impact of arsenic appeared to be stronger: higher levels of arsenic were linked to a 58 percent greater chance of developing left ventricular hypertrophy in this group. (reuters.com)
  • Well water sometimes has higher levels of arsenic than water from municipal systems, which must meet federal safety standards. (cbsnews.com)
  • Her studies have found that brown rice contains higher levels of arsenic than white rice, because arsenic concentrates in the outer layer of rice bran. (cbsnews.com)
  • In a 2012 study by researchers at Dartmouth College, products that listed organic brown rice syrup as a primary ingredient, such as some toddler formulas and cereal bars , tested positive for higher levels of arsenic than products that didn't contain the ingredient or contained less of it. (cnn.com)
  • The Bush administration is putting the brakes on regulations that would sharply reduce the amount of arsenic allowed in drinking water. (loe.org)
  • Only a minimal amount of arsenic is absorbed through the skin. (virginia.gov)
  • Three U.S. House Democrats say their so-called R.I.C.E. Act would require the FDA to set a maximum amount of arsenic permissible in foods containing rice. (latimes.com)
  • Reps. Rosa De Lauro of Connecticut, Frank Pallone of New Jersey and Nita Lowey of New York said in a joint statement that their bill would require the Food and Drug Administration to set a maximum amount of arsenic permissible in foods containing rice. (latimes.com)
  • But today the amount of arsenic from anthropogenic sources, released into the environment as a by-product of agricultural and industrial processes, is increasing. (sgs.com)
  • A five-year, $2.7 million grant from the National Institute of Environmental Health Sciences will help researchers at the University of Illinois at Chicago answer basic questions about the role of arsenic in the development of diabetes and examine the mechanisms by which selenoproteins - found in the human body in 25 different forms - counter the effects of arsenic. (news-medical.net)
  • CURWOOD: How can somebody protect themselves and their family from the effects of arsenic in the drinking water? (loe.org)
  • Pichler suspects that individuals with high blood pressure might be more susceptible to the deleterious effects of arsenic. (reuters.com)
  • The poisonous effects of arsenic, a crystalline metalloid found in the Earth's crust, are linked an array of health problems, including cancers of the skin, lung, bladder, kidney and liver. (telegraph.co.uk)
  • RfC) for chronic inhalation exposures to arsenic was reported. (cdc.gov)
  • Chronic inorganic arsenic poisoning is also associated with a number of chronic medical conditions (hypertension, diabetes mellitus, and peripheral vascular disease) as well as lung, bladder, and hepatic malignancies. (medscape.com)
  • Consuming arsenic at much higher levels than what was found in Peñafiel's products has been associated with many chronic diseases, a statement from Keurig Dr Pepper says. (usatoday.com)
  • Chronic arsenic poisoning is known as arsenicosis. (wikipedia.org)
  • Arsenic is related to heart disease (hypertension-related cardiovascular disease), cancer, stroke (cerebrovascular diseases), chronic lower respiratory diseases, and diabetes. (wikipedia.org)
  • It emitted arsenic-containing air, resulting in patients with chronic arsenic poisoning producing skin changes, skin cancers and sometimes lung cancer. (wikipedia.org)
  • Workers and inhabitants developed chronic arsenic poisoning, and 5 died in a family of 7 in succession. (wikipedia.org)
  • Seven patients were examined extensively at Kumamoto University, and they were diagnosed as having chronic arsenic poisoning due to pollution, in a report published in 1973. (wikipedia.org)
  • In addition to the skin and ENT findings, neuritis was added as a criterion of chronic arsenic poisoning. (wikipedia.org)
  • Bowen's disease, Lung cancer, and cancer of the urinary organ were added as appearing following chronic arsenic poisoning. (wikipedia.org)
  • Clinical aspects of chronic arsenic poisoning due to environmental and occupational pollution in and around a small refining spot. (wikipedia.org)
  • can lead to chronic arsenic poisoning. (wikipedia.org)
  • One year after induction therapy, she had clinical relapse, and therapy was changed to arsenic trioxide at a dose of 0.15 mg/kg/day (17 mg daily), which was administered intravenously 5 days per week for an anticipated 20 dose total. (hindawi.com)
  • Indeed, a two-fold higher level of arsenic was associated with a 47 percent increased risk of a participant having left ventricular thickening, known as hypertrophy. (reuters.com)
  • In response, the FDA undertook additional testing and commissioned a risk assessment study to determine an arsenic limit based on the amount of juice a child might drink and the level of arsenic needed to cause health problems. (go.com)
  • It came back with a high level of arsenic. (nytimes.com)
  • Another lab didn't find any evidence that arsenic was replacing phosphorous in the biochemistry of the organism. (popularmechanics.com)
  • Although there is no good evidence that arsenic can harm pregnant women or their fetuses, studies in animals show that doses of arsenic that are large enough to cause illness in pregnant females may cause low birth weight, fetal malformations, or fetal death. (virginia.gov)
  • While he was able to detect arsenic as yellow arsenic trisulfide, when it came to show it to the jury it had deteriorated, allowing the suspect to be acquitted due to reasonable doubt. (wikipedia.org)
  • Arsenic has been found in at least 781 of 1,300 National Priorities List sites (hazardous waste sites) identified by the U.S. Environmental Protection Agency. (in.gov)
  • Today, the magazine Consumer Reports released a report ** on independent laboratory tests that found inorganic arsenic - a known carcinogen - in some 200 rice products purchased in grocery stores across the United States. (wired.com)
  • However, arsenic is usually found in the environment combined with other elements such as oxygen, chlorine, and sulfur. (cdc.gov)
  • Arsenic has been found in at least 1,149 of the 1,684 National Priority List sites identified by the Environmental Protection Agency (EPA). (cdc.gov)
  • Arsenic can cross the placenta and has been found in fetal tissues. (cdc.gov)
  • Arsenic has been found in at least 1,149 of the 1,684 current or former NPL sites. (cdc.gov)
  • Although the total number of NPL sites evaluated for this substance is not known, the possibility exists that the number of sites at which arsenic is found may increase in the future as more sites are evaluated. (cdc.gov)
  • All the tube wells must be examined by DPHE and if arsenic is found. (hubpages.com)
  • How much arsenic was found in baby food? (mercurynews.com)
  • A scary new study found that many popular baby foods test positive for arsenic, including a whopping 80% of infant formulas. (mercurynews.com)
  • On the whole, about 530 baby food products were tested and researchers found 65% of products tested positive for arsenic. (mercurynews.com)
  • Dr. Oremland believes this the first time an organism has been found that can use arsenic to photosynthesize under anaerobic conditions. (redorbit.com)
  • Some of the arsenic found in rice is organic, a kind that is believed to be harmless. (cbsnews.com)
  • The creature seemed to thrive using arsenic in place of phosphorous, which is one of the six elements commonly found in living organisms. (npr.org)
  • In many cases the arsenic found in food comes from natural sources, but that doesn't mean it is safe," Sonya Lunder, senior research analyst at the organization, said in a statement. (latimes.com)
  • Arsenic is found in a small percentage in the human body: 0.00001 percent. (reference.com)
  • The study found that the formulas in which the syrup was a primary ingredient contained 20 times more arsenic than the other formulas. (cnn.com)
  • It is common for some arsenic to be found in seafood. (cnn.com)
  • The team found that the presence of arsenic weakened and distorted the hitch, while phosphates didn't. (go.com)
  • Colourless, odourless and tasteless, arsenic is commonly found in food and its raw ingredients. (sgs.com)
  • The FDA followed up with its own report on 1,300 samples of rice and rice products, which found that concentrations of inorganic arsenic ranged from an average 0.1 μg per serving in infant formula to an average 7.2 μg per serving in brown rice. (medscape.com)
  • The Associated Press (as carried by the Washington Post) reports that the controversial report of arsenic-based life-forms in a California lake ( much hyped by NASA ) look suddenly less controversial, but in a way that will disappoint those who hoped that such an unexpected thing had actually been found on earth. (slashdot.org)
  • Inorganic arsenic compounds, however, can be found in some homeopathic and folk remedies. (cdc.gov)
  • It has found occasional use as a wood preservative, broad-spectrum biocide, a finishing agent for glass and metal, and a reagent in the synthesis of some dyestuffs and organic arsenic compounds. (wikipedia.org)
  • They found 900 villages with arsenic above the government limit. (wikipedia.org)
  • Many people in the area of Price Landfill own residential wells, which were found to be contaminated with volatile organic compounds, including benzene & chloroform, and arsenic in 1980. (wikipedia.org)
  • The women collected a burial society payout, a type of life insurance, on each death, and it was eventually found that they had been committing murders using arsenic to obtain the insurance money. (wikipedia.org)
  • When a full autopsy of Higgins's body was carried out, evidence of arsenic poisoning was found: Higgins's organs showed traces of arsenic, in quantities indicating the poisoning had taken place over several days. (wikipedia.org)
  • The bodies of John Flannagan, Mary Higgins, and Margaret Jennings all showed evidence of minimal deterioration - a quality associated with arsenic poisoning - and traces of arsenic were found in the remains of all three. (wikipedia.org)
  • New studies contradict existence of arsenic-loving bacteria. (nymag.com)
  • Why a form of bacteria that subsists on arsenic changes everything. (nymag.com)
  • Using arsenic as an energy source was a process used by ancient bacteria, researchers have speculated. (redorbit.com)
  • We suspected that these bacteria were using arsenic to make a living, so we scraped the biofilms off the rock and studied them under laboratory conditions. (redorbit.com)
  • The team showed that the bacteria required both light and arsenic to grow. (redorbit.com)
  • A thorough understanding of how bacteria metabolize arsenic could help scientists comprehend its damaging affects inside human cells. (redorbit.com)
  • The results represent the "nail in the coffin" for the idea that these bacteria can incorporate arsenic into their proteins, enzymes, and even into their DNA as a phosphate stand-in, as the initial study claimed, according to Dan Twafik, a researcher at the Wiezmann Institute of Science in Israel in an interview with the journal Nature. (go.com)
  • In essence, the teams concluded that the bacteria, prosaically dubbed GFAJ-1, had adapted well to living in a high-arsenic environment, but that the organisms still depended on phosphates to survive. (go.com)
  • Dr. Twafik and colleagues were interested in unraveling the mechanism the bacteria use to distinguished between arsenic-based compounds and phosphate and to control their uptake. (go.com)
  • The team now is focusing its efforts on how the bacteria accommodate arsenic in their cells and live to tell the tale. (go.com)
  • A new paper had just been published in the journal Science , they said, which described bacteria that seemed able to build their own DNA from arsenic. (slate.com)
  • Rumors circulated that a number of scientists had sent in formal criticisms (known in the business as "technical comments"), arguing that the study hadn't come close to demonstrating that the bacteria were growing on arsenic. (slate.com)
  • They 'clearly show' that the bacteria can't use arsenic as the researchers claimed, said an accompanying statement from the journal. (slashdot.org)
  • On the minus side, arsenic-crazed bacteria are a rather cool theory to have dashed against the rocks of callous empiricism. (slashdot.org)
  • In recent times, Chinese researchers reported that arsenic trioxide induced remissions in patients with promyelocytic leukemia, a cancer of the blood, including those who had relapsed after other prior therapy. (canadafreepress.com)
  • I t is possible that British author Jane Austen - writer of novels such as Pride and Prejudice and Sense and Sensibility - developed cataracts and died because of arsenic poisoning, researchers at The British Library have said. (telegraph.co.uk)
  • This reveals a potentially important aspect of arsenic carcinogenesis and may help explain observances by researchers working with arsenic that arsenic often causes multiple tumors of many types to form on the skin or inside the body. (nih.gov)
  • The move Friday is based on a Consumer Reports finding this week urging consumers to cut back on rice ingestion after researchers said they discovered "worrisome" traces of inorganic arsenic in products including brown and white rice and rice-based infant cereals, pastas, drinks and crackers. (latimes.com)
  • 2As2O5 + 10F2 → 4AsF5 + 5O2 2As2O3 + 10F2 → 4AsF5 + 3O2 Arsenic pentafluoride is a colourless gas and has a trigonal bipyramidal structure. (wikipedia.org)
  • If you work in copper or lead smelting and inhale arsenic dust or swallow it, if you work with arsenic treated wood, either burning it or through the sawdust, and inhale the dust or smoke, if you work with or frequent a building where arsenic containing pest killers are used, you could accidentally inhale or swallow it. (in.gov)
  • When these ores are heated in smelters, most of the arsenic goes up the stack and enters the air as a fine dust. (cdc.gov)
  • Rain and snow remove arsenic dust particles from the air. (cdc.gov)
  • Arsenic trioxide is volatilized during smelting and accumulates in the flue dust, which may contain up to 30% arsenic trioxide. (cdc.gov)
  • heated in smelters, most of the arsenic goes up the You can be exposed to a substance only when you stack and enters the air as a fine dust. (cdc.gov)
  • Persons whose clothing or skin is contaminated with arsenic may secondarily contaminate others by direct contact or through release of inhalable dust. (cdc.gov)
  • Direct contact with arsenic trioxide dust can cause localized skin irritation, but systemic absorption through the skin is negligible. (cdc.gov)
  • In most jurisdictions, the disposal of arsenic from mine tailings, smelter dust or other industrial applications is strictly regulated. (sgs.com)
  • Reproductive problems (high incidences of miscarriage, low birth weight, congenital deformations) have also been indicated in one study of women exposed to arsenic trioxide dust as employees or neighbours of a copper foundry. (wikipedia.org)
  • Evidence from the home, including "a bottle containing a mystery white substance and a market pocket worn by [Margaret]" was examined by poison expert Dr Campbell Brown, who verified the presence of arsenic - dust in Margaret's pocket, and an arsenic solution (containing unusual adulterants) in the bottle. (wikipedia.org)
  • Fish and seafood are known to be high in arsenic, but mainly in its organic form. (sgs.com)
  • Studies in animals show that large doses of arsenic that cause illness in pregnant females, can also cause low birth weight, fetal malformations, and even fetal death. (cdc.gov)
  • The term has particular application to cadmium, mercury, lead and arsenic, all of which appear in the World Health Organisation's list of 10 chemicals of major public concern. (wikipedia.org)