Inorganic or organic salts and esters of arsenic acid.
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.
A general class of integral membrane proteins that transport ions across a membrane against an electrochemical gradient.
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.
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)
Inorganic salts or organic esters of arsenious acid.
A plant genus of the family PTERIDACEAE. Members contain entkaurane DITERPENES. The name is similar to bracken fern (PTERIDIUM).
Inorganic salts of phosphoric acid.
Inorganic or organic compounds that contain arsenic.
An arsenical that has been used as a dermatologic agent and as an herbicide.
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.
A family of gram-negative, moderately halophilic bacteria in the order Oceanospirillales. Members of the family have been isolated from temperate and Antarctic saline lakes, solar salt facilities, saline soils, and marine environments.
Systems of enzymes which function sequentially by catalyzing consecutive reactions linked by common metabolic intermediates. They may involve simply a transfer of water molecules or hydrogen atoms and may be associated with large supramolecular structures such as MITOCHONDRIA or RIBOSOMES.
A genus of gram-negative, facultatively anaerobic rods. It is a saprophytic, marine organism which is often isolated from spoiling fish.
A plant genus of the family BRASSICACEAE. Members contain crambin.
A subgroup of aquaporins that transport WATER; GLYCEROL; and other small solutes across CELL MEMBRANES.
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)
A genus of gram-negative, straight or slightly curved rods which are motile by polar flagella and which accumulate poly-beta-hydroxybutyrate within the cells.
A schistosomicide possibly useful against other parasites. It has irritant emetic properties and may cause lethal cardiac toxicity among other adverse effects.
The type species of gram-negative, anaerobic bacteria of the genus DESULFOVIBRIO. It is found in FRESHWATER; SOIL, and in marine or brackish water.
Membrane proteins that are involved in the active transport of phosphate.
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
Native, inorganic or fossilized organic substances having a definite chemical composition and formed by inorganic reactions. They may occur as individual crystals or may be disseminated in some other mineral or rock. (Grant & Hackh's Chemical Dictionary, 5th ed; McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Calcium salts of phosphoric acid. These compounds are frequently used as calcium supplements.
Chemicals used in agriculture. These include pesticides, fumigants, fertilizers, plant hormones, steroids, antibiotics, mycotoxins, etc.
Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.
The study of the physical and chemical properties of a drug and its dosage form as related to the onset, duration, and intensity of its action.
An agent that causes the production of physical defects in the developing embryo.
An array of tests used to determine the toxicity of a substance to living systems. These include tests on clinical drugs, foods, and environmental pollutants.
A genus of small, two-winged flies containing approximately 900 described species. These organisms are the most extensively studied of all genera from the standpoint of genetics and cytology.
5'-S-(3-Amino-3-carboxypropyl)-5'-thioadenosine. Formed from S-adenosylmethionine after transmethylation reactions.
Proteins that originate from insect species belonging to the genus DROSOPHILA. The proteins from the most intensely studied species of Drosophila, DROSOPHILA MELANOGASTER, are the subject of much interest in the area of MORPHOGENESIS and development.
Exploitation through misrepresentation of the facts or concealment of the purposes of the exploiter.
Drugs manufactured and sold with the intent to misrepresent its origin, authenticity, chemical composition, and or efficacy. Counterfeit drugs may contain inappropriate quantities of ingredients not listed on the label or package. In order to further deceive the consumer, the packaging, container, or labeling, may be inaccurate, incorrect, or fake.
A member of the alkali group of metals. It has the atomic symbol Na, atomic number 11, and atomic weight 23.

Probing the function of the conserved tryptophan in the flexible loop of the Yersinia protein-tyrosine phosphatase. (1/405)

The involvement of the strictly conserved Trp354 residue in the catalysis of the Yersinia protein tyrosine phosphatase (PTPase) has been investigated by site-directed mutagenesis and kinetic studies. Crystallographic structural data have revealed that Trp354 interacts with the active site Arg409 and is located at one of the hinge positions of the flexible surface loop (WpD loop) which also harbors the general acid/base (Asp356) essential for catalysis [Schubert, H. L., Fauman, E. B., Stuckey, J. A., Dixon, J. E. & Saper, M. A. (1995) Protein Sci. 4, 1904-1913]. Two mutants were constructed and expressed that contained the Trp354-->Phe and Trp354-->Ala substitutions. The K(m) of the W354F and W354A mutants were not significantly different from that of the wild-type. However, a major decrease in the affinity for oxyanions was observed for the mutants, which is consistent with Trp354 playing a role in aligning Arg409 for oxyanion binding. In addition replacement of Trp354 with Phe or Ala caused a decrease in kcat of 200-fold and 480-fold, respectively, and impaired the ability of the mutant enzymes to stabilize the negative charge in the leaving group at the transition state. In fact, the W354F and W354A mutants exhibited catalytic efficiency and leaving group dependency similar to those observed for the general acid-deficient PTPase D356N. These results indicate that Trp354 is an important residue that keeps the WpD loop in a catalytically competent conformation and positions the general acid/base Asp356 in the correct orientation for proton transfer.  (+info)

Sulfurospirillum barnesii sp. nov. and Sulfurospirillum arsenophilum sp. nov., new members of the Sulfurospirillum clade of the epsilon Proteobacteria. (2/405)

Two strains of dissimilatory arsenate-reducing vibrio-shaped bacteria are assigned to the genus Sulfurospirillum. These two new species, Sulfurospirillum barnesii strain SES-3T and Sulfurospirillum arsenophilum strain MIT-13T, in addition to Sulfurospirillum sp. SM-5, two strains of Sulfurospirillum deleyianum, and Sulfurospirillum arcachonense, form a distinct clade within the epsilon subclass of the Proteobacteria based on 16S rRNA analysis.  (+info)

Enhanced transcription factor DNA binding and gene expression induced by arsenite or arsenate in renal slices. (3/405)

Although the kidney represents a target for the accumulation and toxicity of arsenic, little is known about the molecular targets of arsenic in this organ. Therefore, these studies were designed to examine the molecular impact of arsenite [As(III)] and arsenate [As(V)] at low (nanomolar) concentrations. Precision-cut rabbit renal cortical slices were challenged with As(III) or As(V) for up to 8 h. Neither form of the metal induced overt cytotoxicity as assessed by intracellular K+ levels over this time period at concentrations from 0.01-10 microM. In addition, no alterations in the expression of Hsp 60, 70, or 90 were observed. However, induction of heme oxygenase-1 (Hsp 32) was seen following a 4-h challenge with As(III), but not with As(V). As(III) and As(V) induced DNA binding of AP-1 at 2- and 4-h exposure; following a 6-h exposure there was no difference. Although no alteration in the DNA binding activity of ATF-2 was induced by As(III) or As(V), both forms enhanced the DNA binding activity of Elk-1. Enhanced DNA binding activity of AP-1 and Elk-1 correlated with increased gene expression of c-fos, but not c-jun, at 2 h. c-myc gene expression was also induced by As(III) and As(V), albeit at a later time point (6 h). These results suggest that acute arsenic challenge, by either As(III) or As(V), is associated with discrete alterations in the activity of signaling pathways and gene expression in renal tissue.  (+info)

N-acetylneuraminic acid transport by Streptococcus oralis strain AR3. (4/405)

Streptococcus oralis has emerged as one of the most important organisms of the viridans streptococcus group in terms of infections and is recognised as an agent of infective endocarditis and, in immunocompromised patients, septicaemia. The mechanisms by which this organism proliferates in vivo are unknown. However, host-derived sialic acids -- including N-acetylneuraminic acid (NeuNAc) which is present in serum and cell-associated glycoproteins -- are a potential source of fermentable carbohydrate for bacterial proliferation, especially for sialidase-producing bacteria, including S. oralis. To further elucidate the role of NeuNAc in supporting growth, this study determined the ability of S. oralis strain AR3 (isolated from a patient with infective endocarditis) to transport NeuNAc and characterised the transport system. The transport of [14C]-labelled NeuNAc into S. oralis was monitored and this transport system was induced by growth of the bacteria in the presence of the N-acetylated sugars NeuNAc, N-acetylglucosamine and N-acetylmannosamine. The transport system followed typical Michaelis-Menten kinetics, with a Km of 21.0 microM and a Vmax of 2.65 nmoles of NeuNAc transported/min/mg of dry cell mass. NeuNAc transport was inhibited by the presence of exogenous N-glycolylneuraminic acid, a related sialic acid. Chlorhexidine, NaF and 2,4-dinitrophenol were potent inhibitors of the transport system, suggesting that the uptake of NeuNAc occurs via a proton motive force-dependent permease system. This is the first report of the mechanism by which NeuNAc transport occurs in pathogenic streptococci. This transport process may have relevance to the acquisition of a source of fermentable carbohydrate and thus bacterial proliferation in vivo.  (+info)

Sodium arsenate induces overproduction of interleukin-1alpha in murine keratinocytes: role of mitochondria. (5/405)

It has recently been demonstrated that arsenic induces overexpression of keratinocyte-derived growth factors, which are likely to have a significant role in arsenic-induced skin hyperkeratoses and cancer. The mechanism(s) involved in this induction are, however, still elusive. The purpose of this study was to investigate the early intracellular events that follow in vitro treatment with sodium arsenate in a murine keratinocyte cell line (HEL30), which leads to cytokine overproduction. First, we observed that sodium arsenate induced a concentration-dependent production of interleukin-1alpha and a significant increase in cell proliferation, that could be suppressed by the addition of a neutralizing antibody against murine interleukin-1alpha, confirming the ability of arsenic to induce keratinocyte growth-promoting cytokines. Electron microscopic analysis revealed that arsenate induced a dramatic alteration in keratinocyte mitochondria. This effect could be prevented by rotenone pretreatment, which suggests the possible involvement of mitochondria-derived reactive oxygen species. Arsenic induced a concentration- and time-dependent increase in cellular oxidative activity, which was followed by activation of redox-sensitive transcription factors such as nuclear factor-kappaB and activator protein-1, that are essential for interleukin-1alpha synthesis. Prior treatment with rotenone or prolonged treatment with ethidium bromide, an inhibitor of mitochondrial DNA and RNA synthesis, to deplete cells of functional mitochondria, completely prevented sodium arsenate-induced interleukin-1alpha production, this indicates the pivotal role of these organelles in sodium arsenate-induced keratinocyte growth factors.  (+info)

Reactivity of glutaredoxins 1, 2, and 3 from Escherichia coli shows that glutaredoxin 2 is the primary hydrogen donor to ArsC-catalyzed arsenate reduction. (6/405)

In Escherichia coli ArsC catalyzes the reduction of arsenate to arsenite using GSH with glutaredoxin as electron donors. E. coli has three glutaredoxins: 1, 2, and 3, each with a classical -Cys-Pro-Tyr-Cys- active site. Glutaredoxin 2 is the major glutathione disulfide oxidoreductase in E. coli, but its function remains unknown. In this report glutaredoxin 2 is shown to be the most effective hydrogen donor for the reduction of arsenate by ArsC. Analysis of single or double cysteine-to-serine substitutions in the active site of the three glutaredoxins indicated that only the N-terminal cysteine residue is essential for activity. This suggests that, during the catalytic cycle, ArsC forms a mixed disulfide with GSH before being reduced by glutaredoxin to regenerate the active ArsC reductase.  (+info)

Signal transduction pathways regulated by arsenate and arsenite. (7/405)

Arsenate and arsenite activate c-Jun N-terminal kinase (JNK), however, the mechanism by which this occurs is not known. By expressing inhibitory mutant small GTP-binding proteins, p21-activated kinase (PAK) and mitogen-activated protein kinase/extracellular signal-regulated kinase kinase kinases (MEKKs), we have identified specific proteins that are involved in arsenate- and arsenite-mediated activation of JNK. We observe a distinct difference between arsenate and arsenite signaling, which demonstrates that arsenate and arsenite are capable of activating unique proteins. Both arsenate and arsenite activation of JNK requires Rac and Rho. Neither arsenate nor arsenite signaling was inhibited by a dominant-negative mutant of Cdc42 or Ras. Arsenite stimulation of JNK requires PAK, whereas arsenate-mediated activation of JNK was unaffected by inhibitory mutant PAK. Of the four MEKKs tested, only MEKK3 and MEKK4 are involved in arsenate-mediated activation of JNK. In contrast, arsenite-mediated JNK activation requires MEKK2, MEKK3 and MEKK4. These results better define the mechanisms by which arsenate and arsenite activate JNK and demonstrate differences in the regulation of signal transduction pathways by these inorganic arsenic species.  (+info)

Interactions of arsenate, sulfate and phosphate with yeast mitochondria. (8/405)

In the presence of K(+), addition of ATP or ethanol to yeast mitochondria triggers the depletion of the transmembrane potential (DeltaPsi) and this is prevented by millimolar concentrations of phosphate (PO(4)). Different monovalent and polyvalent anions were tested for their protective effects on mitochondria from Saccharomyces cerevisiae. Only arsenate (AsO(4)) and sulfate (SO(4)) were as efficient as PO(4) to protect mitochondria against the K(+) mediated swelling, depletion of the DeltaPsi, and decrease in the ratio of uncoupled state to state 4 respiration rates. Protection by PO(4), SO(4) or AsO(4) was inhibited by mersalyl, suggesting that these anions interact with a site located in the matrix side. In addition, the effects of SO(4) and AsO(4) on the F(1)F(0)-ATPase were tested: both SO(4) and AsO(4) inhibited the synthesis of ATP following competitive kinetics against PO(4) and non-competitive kinetics against ADP. The mersalyl sensitive uptake of (32)PO(4) was not inhibited by SO(4) or AsO(4), suggesting that the synthesis of ATP was inhibited at the F(1)F(0)-ATPase. The hydrolysis of ATP was not inhibited, only a stimulation was observed when AsO(4) or sulfite (SO(3)) were added. It is suggested that the structure and charge similarities of PO(4), AsO(4) and SO(4) result in undiscriminated binding to at least two sites located in the mitochondrial matrix: at one site, occupation by any of these three anions results in protection against uncoupling by K(+); at the second site, in the F(1)F(0)-ATPase, AsO(4) and SO(4) compete for binding against PO(4) leading to inhibition of the synthesis of ATP.  (+info)

Search Indian Sodium Arsenate Manufacturers and Suppliers Details - Contact to Sodium Arsenate Exporters in India, Sodium Arsenate Wholesalers, Sodium Arsenate Distributors and Traders from India.
TRIVENI INTERCHEM PVT. LTD. - Exporter, Manufacturer, Distributor, Supplier, Trading Company of Chromated copper arsenate based in Vapi, India
We couldnt find a conversion between moles Sodium Arsenate and kilomol Do a quick conversion: 1 moles Sodium Arsenate = 1 kilomol using the online calculator for metric conversions.
To further characterized the Drosophila bioassay as a screen to detect developmental toxicants, sodium arsenate heptahyrdrate (SAH; CAS 7631-89-2), a documented animal teratogen and developmental toxicant, was evaluated. SAH concentrations ranging from 263-1528 ug/vial were investigated in a series of three experiments using our published protocol (Teratogenesis, Carcinogenesis, and Mutagenesis 11
Volume 73, no. 16, p. 5130-5137, 2007. Page 5134: A miscalculation was made during the conversion of units for the measured N2O concentrations in sediment denitrification bioassays reported in Fig. 4B and the associated discussion in the text. The reported N2O production rates are too high by a factor of 1/0.028, or 36-fold, as they were not corrected for the headspace volume of the bioassay serum bottles (28 ml). The correct ranges of N2O production rates are 0.001 to 1.8 μmol cm−3 day−1 for Mono Lake samples and 0.01 to 0.5 μmol cm−3 day−1 for Searles Lake samples. Our observations regarding the effects of salinity on denitrification, as well as the other major implications of the study, however, are not affected by this correction.. ...
Business Directory for Ammonium Arsenate Suppliers in Mumbai - Get contact details of Ammonium Arsenate Manufacturers, Wholesale Ammonium Arsenate Exporters, Best Ammonium Arsenate Traders & Distributors Across the Mumbai.
Arsenate minerals usually refer to the naturally occurring orthoarsenates, possessing the (AsO4)3− anion group and, more rarely, other arsenates with anions like AsO3(OH)2− (also written HAsO42−) (example: pharmacolite Ca(AsO3OH).2H2O) or (very rarely) [AsO2(OH)2]− (example: andyrobertsite). Arsenite minerals are much less common.[1] Both the Dana[2] and the Strunz[3] mineral classifications place the arsenates in with the phosphate minerals. Example arsenate minerals include: ...
Chemical Entities of Biological Interest (ChEBI) is a freely available dictionary of molecular entities focused on small chemical compounds.
Natural pollution of groundwater by arsenic adversely affects the health of tens of millions of people worldwide, with the deltaic aquifers of SE Asia being particularly polluted. The pollution is caused primarily by, or as a side reaction of, the microbial reduction of sedimentary Fe(III)-oxyhydroxides, but the organism(s) responsible for As release have not been isolated. Here we report the first isolation of a dissimilatory arsenate reducer from sediments of the Bengal Basin in West Bengal. The bacterium, here designated WB3, respires soluble arsenate and couples its reduction to the oxidation of acetate; WB3 is therefore implicated in the process of arsenic pollution of groundwater, which is largely by arsenite. The bacterium WB3 is also capable of reducing dissolved Fe(III) citrate, solid Fe(III)-oxyhydroxide, and elemental sulfur, using acetate as the electron donor. It is a member of the Desulfuromonas genus and possesses a dissimilatory arsenate reductase that was identified using ...
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to name a couple. Mixite is probably the best known of these, but is still a rare mineral by most considerations. It forms in the oxidation zone of metal ores that probably contained primary bismuth sulfides such as emplectite. As a mineral collection specimen, mixite is truly a wonderful addition. It forms nice radial clusters called spherules, made up of fine acicular crystals. The color is typically a brilliant green of one shade or another coupled with an attractive silky luster. Mixite lends its name to a small group of rather obscure minerals called the Mixite Group. The Mixite Group is a group of hexagonal, hydrated copper arsenate and phosphate hydroxides with a general formula of ACu6(XO4)3(OH)6 - 3H2O The A in the formula can be either bismuth, aluminum, calcium, cerium, lanthanum, yttrium, neodymium or thorium. The X can be either arsenic or phosphorous. These are the members of the Mixite Group: ...
Beyond Pesticides, January 4, 2011) A report released by the Environmental Working Group (EWG) finds that drinking water in 31 cities across the country is contaminated with hexavalent chromium, or chromium-6, a carcinogenic chemical contaminant with numerous sources including treated wood utility poles that line streets and backyards across the the United States. Wood treated with chromated copper arsenate (CCA), such as playgrounds, decks, and railroad ties, in addition to utility poles, can leach the chemicals into soils and groundwater, creating serious risks to public health. Other common sources of chromium-6 pollution include discharge from steel and pulp mills as well as metal-plating and leather-tanning facilities. It can also pollute water through erosion of natural deposits.. The use of CCA in the treatment of utility poles is notable not only because of the presence of poles in numerous communities throughout the country, but also because utility companies often donate or sell ...
ACQ stands for Alkaline Copper Quat. The main active ingredient is copper, which was the main active ingredient in CCA chromated copper arsenate pressure treatment, which was phased out in 2003. Though the copper remains the same, the other ingredients in ACQ are much less toxic than the chromium and arsenic that were used in CCA. According to manufacturers literature on ACQ, quat acts as a co-biocide, providing additional protection from fungi and insect attack that copper alone would not control. Quats are commonly used in household disinfectants and cleaners, and in swimming pools and spas. Quats are biodegradable in soil. Recently my husband and I were faced with a decision as to whether or not we would use ACQ treated wood for posts to hold a garden gate. At both Lowes and Home Depot, free information on ACQ treated wood was obviously displayed. These are interesting documents. On the one hand they say wear a dust mask when cutting, wear gloves when handling, wash exposed areas thoroughly ...
Polyphysa peniculus growing in artificial seawater methylates arsenate to produce a dimethylarsenic derivative, probably dimethylarsinate. When L-methionine-methyl-d3 is added to the culture the CD3 label is incorporated intact in the dimethylarsenic compound to a considerable extent, indicating that S-adenosylmethionine, or some related sulphonium compound, is involved in the biological methylation. Conclusive evidence of the CD3 incorporation was provided by using a specially developed hydride generation-gas chromatography-mass spectrometry methodology.. ...
This list contains biological and chemical agents, in accordance with Art. 7 and points 2 and 3 of the Annex to Directive 94/33/EC, to which young persons (under 18 years of age) may not be exposed at the workplace. The database represents a non-exhaustive list of such substances based on: 1) agents of risk groups 3 and 4 under Directive 2000/54/EC; 2) Table 3 of Annex VI to the CLP Regulation; 3) and Annex I of Directive 2004/37/EC.. ...
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Raw Material India (RMI) is a new startup - an online platform Only For Industrial Raw Materials of all types. This is Indias First-Of-Its-Kind Exclusive B2B Raw Materials website.. ...
ATP uses free energy created by hydrolysis to drive endergonic reactions through phosphorylation. The phosphorylation process involves transferring the ATPs phosphate to a protein or molecule, such...
Pueraria tuberose Linn. is an inexpensive and efficient source to provide all the required nutrients and medicinal benefits for a healthy and rejuvenating body. The present investigation has been undertaken to evaluate the role of Pueraria tuberosa Linn. in modifying the sodium arsenate induced biochemical alterations in albino rats. Administration of sodium arsenate in rats induces oxidative stress, which leads to the generation of free radicals in the body. These free radicals interact with tissue leading to tissue damage i.e, kidney damage. Animals were divided into 6 groups, Group I (control group) rats were treated with normal saline (1mg/kg), Group II ( Positive Control) rats were treated with sodium arsenate (1mg/kg).Group III rats were treated with sodium arsenate (1mg/kg) and Vitamin E (100 mg/kg).Group IV rats were treated with sodium arsenate (1mg/kg) and Pueraria tuberosa linn. extract (50 mg/kg), Group V rats were treated with sodium arsenate (1mg/kg) and Pueraria tuberosa linn.
Pressure-treated wood impregnated with chromated copper arsenate (CCA) - often with a greenish tint - was widely used for decks and porches prior to its being discontinued for residential use in 2003-2004. Since treated wood has a long lifespan, there is still plenty of CCA pressure-treated wood surrounding residences, prompting caution due to its arsenic content. Pressure-treated wood impregnated with chromated copper arsenate (CCA) - often with a greenish tint - was widely used for decks and porches prior to its being discontinued for residential use in 2003-2004. Since treated wood has a long lifespan, there is still plenty of CCA pressure-treated wood surrounding residences, prompting caution due to its arsenic content.
Concurrent occurrence of chromium (Cr), copper (Cu) and arsenic (As) from chromated copper arsenate (CCA) wood preservative in aquatic ecosystems demands that their joint-actions in eliciting toxic effects be assessed for adequate understanding of the health risk they may pose to biota. Clarias gariepinus was exposed to As2O3 , CrO3 and CuO and their composite mixtures (1:1
Searles Lake, San Bernardino Co., California, USA : Dry lake in the Searles Valley of the Mojave Desert. The evaporite basin is approximately 19 km (12 mi) long and 13 km (8.1 mi) at its widest point. The mining community of Trona is on its western ...
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
Mono- and Stereopictres of 5.0 Angstrom coordination sphere of Arsenic atom in PDB 1j9b: Arsenate Reductase+0.4M Arsenite From E. Coli
Ive found something new to blame all my troubles on. Failing memory. Gray hair. Weight gain. Fatigue. Poor eyesight. Lack of muscle tone. The culprit could be chromated copper arsenate. Say that fast three times. I dont mean to make light of what is a serious health concern. But until I read Times staff writer Julie Hausermans investigative report March 11, I didnt even know it existed. Now, it turns out, I and untold others may have been poisoned by chemically treated wood, the kind many of us use to build the decks, fences and doghouses in our back yards. Even though manufacturers and the federal government have known for decades that the treated wood poses a risk to those who touch it, and that it can leach poisonous arsenic into the ground, the word hasnt trickled down to the masses of folks who buy the stuff. Clearly printed warnings might have accomplished that, but the government -- specifically the Environmental Protection Agency -- delegated that responsibility to the people who ...
Limitations on the use of chromated copper arsenate (CCA) have heightened interest in use of arsenic-free copper-based alternatives. For decades, the USDA Forest Products Laboratory has been evaluating several of these systems in stake plots. Southern Pine 38- by 89- by 457-mm (1.5- by 3.5- by 18-inch) stakes were treated with varying concentrations of acid copper chromate (ACC), ammoniacal copper borate (ACB), or acid copper formate (CF) and buried to one-half their length in plots within the Harrison Experimental Forest in Mississippi. Stakes treated with acidic formulations (ACC and CF) generally performed well at copper oxide retentions above 1.8 kg/m3 (0.11 lb/ft3), as did ACB-treated stakes containing 3.5 kg/m3 (0.22 lb/ft 3 ) CuO. However, even at retentions where median ratings and the average index of condition remained high for over 20 years, individual stakes occasionally failed in less than 10 years. The results suggest that occasional early failures caused by copper-tolerant fungi ...
Manufacturer and exporter miscellaneous chemicals, aluminum potassium sulfate, calcium arsenite, calcium borate, calcium boride, calcium chloride hydrate reagent, calcium molybdate, calcium permanganate, calcium salts, inorganic chemicals, potassium pentaborate, potassium pyrophosphate, potassium tetraborate, pyrophosphates (salts), sodium arsenate, sodium arsenite, sodium bisulfate, sodium borate, sodium cacodylate, sodium chromate, sodium cobaltinitrite, sodium copper cyanide. Bhagwati Chemicals Vadodara
Jolly Roger 144X, Stimulant for Speed and Power.. Dimetil (oxi) Sodium Arsenate …………………………. 5 g. Strychnine Sulfate …………………………………….. 296 mg. Iron Glycerohosphate ………………………………… 1.05 g. Vitamin b12 ………………………………………………. 60 mcg. Indications: For hemobooster, post partum paresis, stress, nervous diseases.. SUGGESTED RACING ADMINISTRATION AND DOSAGES. Horses: 10 ml 5 hs before the race - IV. Camels: 7 ml 5 hs before the race - IV. PRESENTATION. 50 ml. OTHES PRESENTATION/s:. ...
Mesoporous pellet adsorbent developed from mixing at an appropriate ratio of natural clay, iron oxide, iron powder, and rice bran was used to investigate the optimization process of batch adsorption parameters for treating aqueous solution coexisting with arsenate and arsenite. Central composite design under response surface methodology was applied for optimizing and observing both individual and interactive effects of four main influential adsorption factors such as contact time (24-72 h), initial solution pH (3-11), adsorbent dosage (0-20 g/L) and initial adsorbate concentration (0.25-4.25 mg/L). Analysis of variance suggested that experimental data were better fitted by the quadratic model with the values of regression coefficient and adjusted regression coefficient higher than 95%. The model accuracy was supported by the correlation plot of actual and predicted adsorption efficiency data and the residual plots. The Pareto analysis suggested that initial solution pH, initial adsorbate concentration,
Udv a vegekrol, szerintem ez a ket vicc angolul is jo, hadd ne forditsam le oket. This is a story about Bosnian communism, a very particular form of Yugoslav communism, which is itself, of course, a particular branch of communism. Two friends, Mujo and Haso, are walking down a road. Suddenly, they find a piece of excrement (I suppose we can call it shit) on the road. So Mujo says to Haso: - Haso, I shall pay you 100 dinars if you eat this shit on the road. Haso says, after a thought: All right, and he eats it. So Mujo pays him 100 dinars and they continue their walk. After a certain time they find another shit on the road. This time Haso says: - Mujo, if you eat this shit I shall pay you 100 dinars. Mujo thinks for a while, says All right, and eats it. Haso pays him then 100 dinars. And they continue walking... After a bit of thought Mujo feels uncomfortable and is unsatisfied. He says to Haso: - Listen, Haso, I think we are two idiots. We have both eaten shit, and nobody had no profit out ... is the marketplace for research antibodies. Find the right antibody for your research needs. Disruption of ptLPD1 or ptLPD2, genes that encode isoforms of the plastidial lipoamide dehydrogenase, confers arsenate hypersensitivity in Arabidopsis.
The befitting capping capabilities of AsO43− provide a stable Cu2O nanocatalyst from a galvanic reaction between a Cu(ii) precursor salt and As(0) nanoparticles. This stable Cu2O hydrosol appears to be a suitable catalyst for the one-electron transfer reversible redox reaction between Eosin Y and NaBH4. The
Suite à la minéralization en fer de type skarn dâge tardi-miocène à Mega Livadi sur lîle de Serifos, en Grèce, il y eut un épisode de minéralisation hydrothermale en Cu et As dans les calcaires au contact supérieur dun pluton granodioritique. La minéralisation hypogène, avec pyrite, minéraux du groupe de la tennantite arsenifères et larsénopyrite, ont subi une forte altération au cours du Pliocène et du Quaternaire, attribuable aux eaux météoriques descendantes. Nous subdivisons les processus géogéniques et anthropogéniques responsables de cette altération en cinq stades, avec distinctions dans leurs bilans déléments, leur Eh et leur pH. Les stades supergènes I à III contiennent un assemblage varié doxydes, dhydroxydes et darsenates: stade I (goethite, mélange de minéraux Fe-As-Sb-Cu à grains fins, pharmacosidérite), stade II (beudantite riche en Sb, beudantite riche en terres rares), et stade III (arséniosidérite). Les ...
Messens, J., J. C. Martins, K. Van Belle, E. Brosens, A. Desmyter, M. De Gieter, J-M. Wieruszeski, R. Willem, L. Wyns, and I. Zegers, All intermediates of the arsenate reductase mechanism, including an intramolecular dynamic disulfide cascade., Proc Natl Acad Sci U S A, vol. 99, issue 13, pp. 8506-11, 2002 Jun 25. ...
In chapter 3, The Sense of Sensibility, author Wendy Jones uses scenes from one of Jane Austens most celebrated novels to illustrate the functioning of the bodys stress response system.. 0 Comments. ...
Olivenite Group. Structurally distinct, intermediate member of the solid solution series between Olivenite and Adamite with a Zn:Cu ratio of (ideally) ...
Development of KTiOAsO4 and isostructural arsenates as new electrooptic materials. This involves (a) the growth of crystals of suitable size and quality for research, (b) investigation of their structural, optical and physical properties: the establishment of structure/property relationships, (c) development of waveguide fabrication methods in KTiOAsO4, (d) investigation of crystal twinning and poling methods for its elimination. ...
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A Morebooks! online könyváruház több mint 2.500.000 könyvet kínál különböző nyelveken. Elsősorban a tudományos könyvekre szakosodtunk és arra, hogy a legegyszerűbb és legzökkenőmentesebb vásárlási élményt biztosítsuk. Fedezze fel a kategóriáink óriási választékát és élvezze a gyors házhozszállítás előnyeit.
A Morebooks! online könyváruház több mint 2.500.000 könyvet kínál különböző nyelveken. Elsősorban a tudományos könyvekre szakosodtunk és arra, hogy a legegyszerűbb és legzökkenőmentesebb vásárlási élményt biztosítsuk. Fedezze fel a kategóriáink óriási választékát és élvezze a gyors házhozszállítás előnyeit.
Felhívjuk felhasználóink figyelmét arra, hogy a DEA Egyetemi IP és Könyvtári számítógépek elérési szintű dokumentumai kizárólag oktatási, kutatási, valamint saját tanulási célokra használhatóak fel, azt nem oszthatják meg az interneten és nem terjeszthetik. A dokumentum és a pdf megjelenítő védelmének megkerülése (másolás, nyomtatás, letöltés korlátozása) tilos ...
Felhívjuk felhasználóink figyelmét arra, hogy a DEA Egyetemi IP és Könyvtári számítógépek elérési szintű dokumentumai kizárólag oktatási, kutatási, valamint saját tanulási célokra használhatóak fel, azt nem oszthatják meg az interneten és nem terjeszthetik. A dokumentum és a pdf megjelenítő védelmének megkerülése (másolás, nyomtatás, letöltés korlátozása) tilos ...
Page 9 - (Disclaimer: So this turned out to be longer than I thought it would, and a bit of a rant. Sorry! But I think this is something thats relevant to all of us). Some background: I work in a combined
In molecular biology, the ars operon is an operon found in several bacterial taxon. It is required for the detoxification of arsenate, arsenite, and antimonite. This system transports arsenite and antimonite out of the cell. The pump is composed of two polypeptides, the products of the arsA and arsB genes. This two-subunit enzyme produces resistance to arsenite and antimonite. Arsenate, however, must first be reduced to arsenite before it is extruded. A third gene, arsC, expands the substrate specificity to allow for arsenate pumping and resistance. ArsC is an approximately 150-residue arsenate reductase that uses reduced glutathione (GSH) to convert arsenate to arsenite with a redox active cysteine residue in the active site. ArsC forms an active quaternary complex with GSH, arsenate, and glutaredoxin 1 (Grx1). The three ligands must be present simultaneously for reduction to occur. ArsA and ArsB form an anion-translocating ATPase. The ArsB protein is distinguished by its overall hydrophobic ...
Problem: Until the early 2000s, most of the pressure-treated wood used in the United States for outdoor structures such as playground equipment, picnic tables, benches and decks was treated with the preservative, Chromated Copper Arsenate (CCA). This chemical was the primary preservative used in the pressure-treating process to protect wood against weather, mold and insects. Studies show that CCA-treated wood is continually leaching (releasing) arsenic to the surface of the wood. Arsenic is known to cause cancer in humans: it is a potent skin, bladder and lung carcinogen. Arsenic is also linked to liver and kidney cancer, immune system suppression, increased risk of high blood pressure, cardiovascular disease, endocrine disruption (altering normal hormone levels or activity in the body) and diabetes. Studies have confirmed that high levels of arsenic can be released onto childrens hands by direct contact with arsenic-treated wood. Young children, in particular, are at risk of ingesting ...
TY - JOUR. T1 - The importance of glutathione and phytochelatins on the selenite and arsenate detoxification in Arabidopsis thaliana. AU - Aborode, Fatai Adigun. AU - Raab, Andrea. AU - Voigt, Matthias. AU - Costa, Leticia Malta. AU - Krupp, Eva M. AU - Feldmann, Joerg. N1 - This study was supported by the Tesla Research Funds. L.M.C. thanks CNPq (201969/2010-6) for her research visit to Aberdeen and M.V. thanks the European Erasmus Exchange programme. PY - 2016/11. Y1 - 2016/11. N2 - We investigated the role of glutathione (GSH) and phytochelatins (PCs) on the detoxification of selenite using Arabidopsis thaliana. The wild-type (WT) of Arabidopsis thaliana and its mutants (glutathione deficient Cad 2-1 and phytochelatins deficient Cad 1-3) were separately exposed to varying concentrations of selenite and arsenate and jointly to both toxicants to determine their sensitivities. The results of the study revealed that, the mutants were about 20-fold more sensitive to arsenate than the WT, an ...
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 ...
Town of North Hempstead Supervisor Judi Bosworth is continuing to urge PSEG Long Island to use nontoxic preservatives on its utility poles, after it was reported this week that the utility company would start transitioning away from using the controversial preservative pentachlorophenol (penta) and towards using a different one called CCA, or Chromated Copper Arsenate. Penta and CCA are both restricted-use pesticides and are approved by the EPA for utility poles. CCA contains known carcinogens when inhaled or ingested.. It seems that PSEG is just exchanging one poison for another, said Bosworth. Simply trading penta for CCA doesnt make sense or address the issue. I will continue to urge our utility companies to use non-toxic treatments for wooden poles or to begin using composite poles or another safe alternative.. In a letter to PSEG-LI President and CEO David Daly, Bosworth stated: Cost-saving measures that put citizens health at risk are short sighted. With PSEG-LI setting about 4,000 ...
In this study, water stable zirconium metal-organic framework (UiO-66) has been synthesized and for the first time applied as an adsorbent to remove aquatic arsenic contamination. The as-synthesized UiO-66 adsorbent functions excellently across a broad pH range of 1 to 10, and achieves a remarkable arsenate uptake capacity of 303 mg/g at the optimal pH, i.e., pH = 2. To the best of our knowledge, this is the highest arsenate As(V) adsorption capacity ever reported, much higher than that of currently available adsorbents (5-280 mg/g, generally less than 100 mg/g). The superior arsenic uptake performance of UiO-66 adsorbent could be attributed to the highly porous crystalline structure containing zirconium oxide clusters, which provides a large contact area and plenty of active sites in unit space. Two binding sites within the adsorbent framework are proposed for arsenic species, i.e., hydroxyl group and benzenedicarboxylate ligand. At equilibrium, seven equivalent arsenic species can be captured by
Founded in 2007, Jiangxi Qianhua Industry Co., Ltd. is a specialized production and trade enterprise. Now, we are mainly engaged in the research and manufacturing of fine chemicals.
TY - JOUR. T1 - Increasing the arsenate adsorption capacity of neutralized red mud (Bauxsol). AU - Genc Fuhrman, Hülya. AU - Tjell, Jens Christian. AU - McConchie, D.. PY - 2004. Y1 - 2004. M3 - Journal article. VL - 271. SP - 313. EP - 320. JO - Journal of Colloid and Interface Science. JF - Journal of Colloid and Interface Science. SN - 0021-9797. ER - ...
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 ...
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 ...
Pressure treated lumber is treated with chromium copper arsenate (CCA) to prolong the life of the wood. Its always best to wear gloves when handling, and wear a dust-mask while youre cutting the timbers. As far as safety is concerned when used around vegetables, there are two sides to the story. One says they are safe, citing studies showing little or no leaching of arsenate. The other side has its own studies and says it does leach at dangerous levels. I prefer to err on the cautious side and recommend gardeners not use pressure treated wood around food plants. Try cedar, redwood, plastic timbers, or even cement blocks instead. If you already have the pressure treated wood in place, you can line it with heavy plastic to keep chemicals from leaching into the bed and you can be careful to plant only above ground veggies (tomatoes, corn, etc.) nearest the edges of the bed, saving the center for underground veggies such as beets and carrots ...
The arsR-type HTH domain is a DNA-binding, winged helix-turn-helix (wHTH) domain present in transcription regulators of the arsR/smtB family, involved in stress-response to heavy metal ions. This family of prokaryotic metal-sensing transcription repressors is named after Escherichia coli arsR, an arsenic-responsive repressor of the ars operon for arsenate reductase and metal ion extrusion, and after Synechococcus PCC 7942 smtB, a Zn(II)-responsive repressor of the smtA gene for a Zn sequestering metallothionein [ (PUBMED:12829264) ]. ArsR/smtB-like repressors of metal resistance operons specifically bind to the operator/promoter and seem to dissociate from the DNA in the presence of metal ions, permitting transcription of proteins involved in metal-ions efflux and/or detoxification. The crystal structure of the cyanobacterial smtB shows a fold of five alpha-helices (H) and a pair of antiparallel beta-strands (B) in the topology H1-H2-H3-H4-B1-B2-H5. Helices 3 and 4 comprise the helix-turn-helix ...
Microorganisms play an important role in arsenic (As) cycling in the environment. Microbes mobilize As directly or indirectly, and natural/geochemical processes such as sulphate and iron reduction, oxidative sulphide mineral dissolution, arsenite (AsO33?) oxidation and arsenate (AsO43?) respiration further aid in As cycle in the environment. Arsenate serves as an electron donor for the microbes during anaerobic conditions in the sediment. The present work reviews the recent development in As contamination, various As-metabolizing microbes and their phylogenetic diversity, to understand the role of microbial communities in As respiration and mobilization. It also summarizes the contemporary understanding of the intricate biochemistry and molecular biology of natural As metabolisms. Some successful examples of engineered microbes by harnessing these natural mechanisms for effective remediation are also discussed. The study indicates that there is an exigent need to have a clear understanding of ...
More than 500 tufa spires rise up from the basin of the ancient Searles Lake bed 10-miles south of Trona, a depressed mining town. Similar to Mono Lake, these tufa towers formed underwater as calcium carbonate precipitated out of the water over time, only to be exposed later as the lake bed dried up. The towers range in age from 10,000 - 100,000 years old.
Villadangos, A. F., K. Van Belle, K. Wahni, V. Tamu Dufe, S. Freitas, H. Nur, S. De Galan, J. A. Gil, J-F. Collet, L. M. Mateos, et al., Corynebacterium glutamicum survives arsenic stress with arsenate reductases coupled to two distinct redox mechanisms., Mol Microbiol, vol. 82, issue 4, pp. 998-1014, 2011 Nov. ...
Searles Lake is located at Trona, CA. Its a remnant from wetter times in the Pleistocene. Carbonate and borate minerals are mined from the lake; a pile of trona is visible on the far right of the image at the Westend plant.. ...
Purchase your copy of BS EN 2122:1996 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available online in electronic and print formats.
The covalent radius of arsenic is about 11% larger than that of phosphorus (see this periodic table tool), and the As-O bond lengths reported in Table 3 are about 13% longer than the P-O bond lengths in DNA (Table S3). No DNA polymerase could function on a template with such unpredictable geometry. Even if it could bind to the template strand and proceed along it, the differing bond lengths it encountered would prevent the incoming nucleotides from forming the necessary bond with the growing end. And even if it could create the backbone of the daughter strand, the error rate due to base mispairing would be so high that reproduction would fail ...
Sooty blotch and flyspeck may be as old as apples themselves. Drawings of apple varieties from the 1820s clearly show sooty blotch on every fruit. It wasnt until sprayed-on pesticides, such as lime sulfur and lead arsenate, became popular around 1900 that consumers began to expect to buy apples without a heavy coating of sooty blotch and flyspeck. The cosmetically perfect apples found in todays supermarkets werent common until the middle of the 20th century, when more effective organic fungicides appeared.. ...
Allscripts is an industry leader in EHR and EMR software. Learn more about South Nassau Communities Hospital Selects Eclipsys to Meet ARRA Meaningful Use Requirements
Study Fails to Confirm Existence of Arsenic-Based Life - Scientific American: Rosie Redfield of the University of British Columbia has completed her attempts to replicate the findings of Felicia Wolfe-Simon, namely that the GFAJ-1 bacterium could utilize arsenic in its DNA backbone in the place of phosphorous. UPDATE: Redfield Lab manuscript available on arXiv ...
In a study published by Taylor Francis Online, and written by Kathleen Searles, Sophie Spencer and Adaobi Duru, its quite clear that abusive and uncivil comments (like UR a commie lib and you eat babies - go die) negatively affect perception of both a publication and its authors, regardless of gender.
Evaluating Essential Perfusion Skills: An Application of High Fidelity Simulation. AmSECT Best Practice / ICEBP Meeting, San Diego, California, October 10, 2012 -- 2 hour session - co-presented with Ed Darling - Session Organizer & Speaker - (B. Searles ...
Ive just been exchanging emails with someone else who is trying to grow GFAJ-1 to look at the DNA. Theyre also dealing with a media-related problem, though not the same problem as mine ...
Azt a legt bben tudjuk, hogy tejjel vagy alkohollal sok gy gyszert nem vehet nk be, de arra nem gondolunk, hogy a reggelihez fogyasztott gy m lcsitalunk is sokf le orvoss ggal k lcs nhat sba l phet.
Plasmid XNOR-gate-V2.0-ASV from Dr. Drew Endys lab contains the insert XNOR-gate and is published in Science. 2013 May 3;340(6132):599-603. doi: 10.1126/science.1232758. Epub 2013 Mar 28. This plasmid is available through Addgene.
  • It is a colourless solid that is produced by the reaction between sodium arsenate and a soluble aluminium salt. (
  • Sodium arsenate heptahydrate - developmental toxicity in intact Drosophila melanogaster. (
  • We provide independent and unbiased information on manufacturers, prices, production news and consumers for the global and regional (North America, Asia and Europe) market of Sodium arsenate. (
  • Experiments were conducted to study toxic effect of sodium arsenate on haematological parameters of the freshwater catfish Mystus vittatus. (
  • LC50 value of sodium arsenate was calculated for a period of 96hrs. (
  • M. vittatus exposed to sub lethal doses such as 0.15, 0.75, 1.5 and 2.0 ppm sodium arsenate. (
  • Sodium arsenate toxicity induced a significant decrease in Haemoglobin content, and RBC count and increase in WBC count. (
  • Growth of major pulse crop Mungbean ( Vigna radiata (L.)Wilczek) was affected right from seedling stage when treated with Sodium arsenate (Na 2 HAsO 4 .7H 2 O). With the increase in concentration of Sodium arsenate (5μM, 10μM and 20μM) significant decrease in seedling length, water content and primary leaf area was observed. (
  • The vital pigments like chlorophyll, caroteniod content as well as Hill activity reduced appreciably in sodium arsenate treated seedlings which indicates poor photosynthetic metabolism. (
  • Swarnakar, A. (2016) "Mitigation of Toxic effects of Sodium Arsenate on germination, seedling growth and amylolytic enzyme of Mungbean seedlings with Macronutrients, Micronutrients and Organic acids. (
  • Characterization of the Arsenate Respiratory Reductase from Shewanella sp. (
  • I0B8K4_9BACI Arsenate reductase (Fragment) OS=uncultured Bacillus sp. (
  • I've some proteins which have molecular weight in range of phytochelatin synthase and Arsenate reductase.Is there any known antibody for any of it by which I can do western blotting? (
  • The gene encoding the small subunit of the respiratory arsenate reductase (arrB) from the haloalkaliphilic low G+C Gram positive bacterium Bacillus selenitireducens strain MLS-10 was amplified by PCR, cloned and sequenced. (
  • Pemberton H.E. (1983) Phosphates, Arsenates. (
  • The Arthurite Group is a group of monoclinic, hydrated iron arsenates and phosphates with a general formula of XFe 2 (AO 4 ) 2 (O, OH) 2 - 2H 2 O The X in the formula can be either copper, iron, manganese and/or zinc. (
  • Acid salts are also known, including diammonium arsenate and ammonium dihydrogen arsenate. (
  • Potassium arsenate is used as a metabolic inhibitor and toxicity agent. (
  • Effective Modeling Framework for Quantifying the Potential Impacts of Coexisting Anions on the Toxicity of Arsenate, Selenite, and Vanadate. (
  • Arsenate toxicity led to decrease in reducing and non reducing sugar content in the mungbean seedlings whereas starch content was elevated. (
  • Pretreatment of mungbean seeds with Phytohormone-GA 3 and Kinetin could ameliorate Arsenate induced toxicity to different extent in terms of growth and sucrose metabolism. (
  • Abedin, M. J. and Meharg, A. A. (2002) "Relative toxicity of arsenite and arsenate on Germination and early seedling growth of rice (Oryza sativa L.)". Plant and soil, 243 (1): 57-66. (
  • An arsenate ion resulting from the removal of two protons from arsenic acid. (
  • Calcium salt (2:3) of arsenic acid, Cucumber dust, Tricalcium arsenate, Tricalcium ortho-arsenate [Note: Also see specific listing for Arsenic (inorganic compounds, as As). (
  • Arsenate compounds contain the arsenate ion, AsO4 3- , and are moderately oxidizing salts or esters of arsenic acid that are typically very toxic. (
  • The results indicate that the nano-sized iron oxide-coated adsorbent is potentially suitable for removal of arsenate from drinking water. (
  • Recipient(s) will receive an email with a link to 'Equilibrium and kinetics study on removal of arsenate ions from aqueous solution by CTAB/TiO2 and starch/CTAB/TiO2 nanoparticles: a comparative study' and will not need an account to access the content. (
  • The previously suggested mechanisms attributing the enhanced removal of arsenate from solution in the presence of Zn(II) to additional adsorption on iron oxides could not be verified under the experimental conditions studied. (
  • Researchers from the University of Southampton and the University of Bath combined barium hydroxide and arsenate to create a novel lightweight, structurally complex set of anoporous zeotype structures that may be beneficial for hydrogen storage and other industrial applications that require nanoporous materials . (
  • Precipitation of zinc hydroxide carbonate followed by arsenate adorption onto the precipitate was found to be a plausible mechanism explaining the arsenate removal from a solution in the presence of Zn(II) at pH/pD 8. (
  • Chemistry: KFe 4 (AsO 4 )(OH) 4 - 7H 2 O, Hydrated Potassium Iron Arsenate Hydroxide. (
  • Physical adsorption of arsenate to ferric hydroxide proceeded with no activation barrier, with Gibbs free energies of reaction ranging from -21 to -58 kJ/mol. (
  • The highest Gibbs free energies of reaction for physical adsorption resulted from negative charge assisted hydrogen bonding between H atoms on the ferric hydroxide and O atoms in arsenate. (
  • The structural and kinetic findings of the Arr enzyme complex reported here both help rationalize its extracytoplasmic localization and allow us to predict that the rate of arsenate release from minerals likely constrains its activity in sedimentary environments. (
  • These observations, combined with knowledge of typical sedimentary arsenate and phosphate concentrations and known rates of arsenate desorption from minerals in the presence of phosphate, suggest that ( i ) arsenate desorption limits microbiologically induced arsenate reductive mobilization and ( ii ) phosphate enhances arsenic mobility by stimulating arsenate desorption rather than by inhibiting it at the enzymatic level. (
  • Associated Minerals are pharmacosiderite , beudantite and other secondary arsenate minerals. (
  • At the mineralogically famous Långban iron and manganese mines in central Sweden, more than 50 species of arsenate minerals have been described, many peculiar to the locality. (
  • Mixite is one of just a handfull of bismuth minerals and one of even fewer bismuth arsenates. (
  • Abstract The contribution of the phosphate transporters (PHTs) in uptake of arsenate (As 5+ ) and phosphate (P) is a widely recognized mechanism. (
  • isolated strain GFAJ-1 from the arsenic-rich sediments of California's Mono Lake by its ability to grow through multiple subculturings in artificial Mono Lake medium AML60 that lacked added phosphate but had high concentrations of arsenate (+As/-P condition) ( 1 ). (
  • Past use of lead arsenate insecticides has resulted in elevated concentrations of lead (Pb) and arsenic (As) in topsoils of many existing and former deciduous tree fruit orchard sites throughout the world. (
  • Experimental design was completely randomized with different arsenate concentrations (0, 25, 50 and 100 μM) with or without 5 mM silicate. (
  • The wild-type (WT) of Arabidopsis thaliana and its mutants (glutathione deficient Cad 2-1 and phytochelatins deficient Cad 1-3) were separately exposed to varying concentrations of selenite and arsenate and jointly to both toxicants to determine their sensitivities. (
  • This study examined the transfer of arsenate (As(V)) to aphids (Myzus persicae) from pepper plants cultivated in As(V) contaminated soils of two concentrations (2 and 6 mg As(V)/kg dry soil), and the subsequent biological effects on the aphid parasitoid, Aphidius colemani. (
  • Cytotoxicity and genotoxicity has beenevaluated by exposure of IEC-6 cells to arsenate (5mM)and arsenite (1.5mM)at low concentrations. (
  • The inorganic As can be present in natural aquatic systems in four oxidation states: +V (arsenate), +III (arsenite), 0 (elemental As), and −III (arsine). (
  • Aqueous arsenic is commonly found in two oxidation states, AsV (arsenate) or AsIII (arsenite). (
  • Salinity effects on microbial community structure and on potential rates of arsenate reduction, arsenite oxidation, sulfate reduction, denitrification, and methanogenesis were examined in sediment slurries from two California soda lakes. (
  • Ammonium arsenate is the inorganic compound with the formula (NH4)3AsO4. (
  • We present a comparative study on the efficacy of TiO 2 nanoparticles for arsenate ion removal after modification with CTAB (N-cetyl-N,N,N-trimethyl ammonium bromide) followed by coating with starch biopolymer. (
  • The effects of solution pH and presence of competing ions on arsenate uptake were investigated and the Langmuir adsorption capacity was obtained. (
  • Genc Fuhrman, H , Tjell, JC & McConchie, D 2004, ' Increasing the arsenate adsorption capacity of neutralized red mud (Bauxsol) ', Journal of Colloid and Interface Science , vol. 271, pp. 313-320. (
  • Microbial arsenate respiration enhances the mobility of arsenic and contributes to the poisoning of tens of millions of people worldwide. (
  • Our ability to quantitatively predict how microbial activities shape arsenic geochemistry depends on a detailed understanding of how the enzymes that catalyze arsenate reduction work under environmentally relevant conditions. (
  • The basic evidence for microbial growth on arsenate is presented for studies with both consortia and isolates, followed by a summary of the physiology and phytogeny of four arsenate-respiring bacteria: Chrysiogenes arsenatis strain BAL-1 T , Desulfotomaculum auripigmentum strain OREX-4, Sulfurospirillum arsenophilus strain MIT-13, and S. barnesii strain SES-3. (
  • We conclude with a discussion of the importance of microbial arsenate reduction in the environment. (
  • Arthurite is a rare copper iron arsenate. (
  • Copper arsenate is a Arsenical compound. (
  • This report focuses on the Chromated Copper Arsenate in global market, especially in North America, Europe and Asia-Pacific, South America, Middle East and Africa. (
  • The worldwide market for Chromated Copper Arsenate is expected to grow at a CAGR of roughly xx% over the next five years, will reach xx million US$ in 2023, from xx million US$ in 2017, according to a new GIR (Global Info Research) study. (
  • There are 15 Chapters to deeply display the global Chromated Copper Arsenate market. (
  • The use of the waterborne wood preservative, ammoniacal copper zinc arsenate (ACZA), is likely to increase in the near future because of environmental concerns associated with oilborne preservatives. (
  • The Mixite Group is a group of hexagonal, hydrated copper arsenate and phosphate hydroxides with a general formula of ACu 6 (XO 4 ) 3 (OH) 6 - 3H 2 O The A in the formula can be either bismuth, aluminum, calcium, cerium, lanthanum, yttrium, neodymium or thorium. (
  • The chosen mixture of ions was imitating leak of pesticide well known as chromate copper arsenate (CCA). (
  • Magnesium arsenate phosphor (CAS 1343-96-0) Market Research Report 2018 aims at providing comprehensive data on magnesium arsenate phosphor market globally and regionally (Europe, Asia, North America, Latin America etc. (
  • The report includes magnesium arsenate phosphor description, covers its application areas, manufacturing methods, patents. (
  • It captures magnesium arsenate phosphor market trends, pays close attention to magnesium arsenate phosphor manufacturers and names suppliers. (
  • Besides, the report provides magnesium arsenate phosphor prices in regional markets. (
  • In addition to the above the report determines magnesium arsenate phosphor consumers. (
  • Magnesium arsenate phosphor (CAS 1343-96-0) Market Research Report 2018 contents were prepared and placed on the website in April, 2018. (
  • Please note that Magnesium arsenate phosphor (CAS 1343-96-0) Market Research Report 2018 is a half ready publication and contents are subject to change. (
  • Magnesium arsenate is a chemical compound of magnesium and arsenic. (
  • Phosphate is indispensable and arsenate is toxic, but this extensive similarity raises the question whether arsenate may substitute for phosphate in certain niches. (
  • Cationic hydrogels for toxic arsenate re. (
  • Poly(3-acrylamidopropyl)trimethylammonium chloride (p(AFTMACl)) hydrogels were synthesized and utilized as absorbents for the removal of toxic arsenate from aqueous medium. (
  • Aluminium arsenate is an inorganic compound with the formula AlAsO4. (
  • An inorganic sodium salt composed from sodium cations and arsenate anions in a 3:1 ratio. (
  • Tissue distribution and urinary excretion of inorganic arsenic and its methylated metabolites in C57BL6 mice following subchronic exposure to arsenate in drinking water. (
  • In this study, dose-dependency in tissue distribution and urinary excretion for inorganic arsenic and its methylated metabolites was assessed in female C57Bl/6 mice exposed to 0, 0.5, 2, 10 or 50 ppm arsenic (as arsenate, AsV) in their drinking water for 12 weeks. (
  • belongs to the class of inorganic compounds known as alkaline earth metal arsenates. (
  • These are inorganic compounds in which the largest oxoanion is arsenate, and in which the heaviest atom not in an oxoanion is a lanthanide. (
  • Two of the species were sensitive to arsenate, while two others were resistant to it. (
  • The results of the study revealed that, the mutants were about 20-fold more sensitive to arsenate than the WT, an indication that the GSH and PCs affect arsenate detoxification. (
  • Potassium arsenate may be used as a reference material during the analysis of biological materials for the presence of arsenate. (
  • Potassium Titanyl Arsenate is a crystalline solid used in photo optic applications. (
  • Potassium titanyle arsenate (KTiOAsO4), or KTA, is a nonlinear optical crystal for Optical Parametric Oscillation (OPO) application. (
  • Potassium Titanyle Arsenate (KTA) Report by Material, Application, and Geography Global Forecast to 2022 is a professional and comprehensive research report on the world's major regional market conditions, focusing on the main regions (North America, Europe and Asia-Pacific) and the main countries (United States, Germany, United Kingdom,Japan, South Korea and China). (
  • In this report, the global Potassium Titanyle Arsenate (KTA) market is valued at USD XX million in 2018 and is projected to reach USD XX million by the end of 2022, growing at a CAGR of XX% during the period 2018 to 2022. (
  • Potassium Titanyl Arsenate (KTiOAsO4 or KTA) is an excellent optical non-linear crystal developed recently for non-linear optical and electrooptical device applications. (
  • page 131, B. Sharan "A new modification of aluminum ortho-arsenate" Acta Crystallogr. (
  • This study was conducted to investigate the adsorption and desorption properties of arsenate [As(V)] on nano-sized iron-oxide-coated quartz (IOCQ) through batch experiments. (
  • Increasingly negative charges on the complexes lowered the activation barriers for desorption of arsenate, and in complexes with -2 charges, the highest activation barrier was 65 kJ/mol. (
  • Arthurite is unusual in that it contains a variety of anions, namely arsenate, phosphate and sulfate. (
  • Percentage whys, the arsenate anion dominates in natural specimens, but all anions are usually present in the same specimen. (
  • Our results demonstrate that these types of hydrogels are highly effective in removing arsenate(V) anions from the aqueous environment. (
  • An arsenate sorbent was prepared by immobilising a phenolate di-zinc(II) complex onto a polystyrene resin. (
  • Arr activity assays using methyl viologen as the electron donor and arsenate as the electron acceptor display two-site ping-pong kinetics. (
  • Strain WP30 is a chemoorganoheterotroph and requires elemental sulfur and/or arsenate as an electron acceptor. (
  • This finding was surprising because arsenate is predicted to reduce rapidly to arsenite in physiological conditions ( 3 , 4 ) and because arsenate esters in aqueous solution are known to be rapidly hydrolyzed ( 5 ). (
  • Arsenate respiration by bacteria was discovered over two decades ago and is catalyzed by diverse organisms using the well-conserved Arr enzyme complex. (
  • In this review, we summarize the important recent findings relating to arsenate respiration by bacteria. (
  • A strain of Halomonas bacteria, GFAJ-1, has been claimed to be able to use arsenate as a nutrient when phosphate is limiting and to specifically incorporate arsenic into its DNA in place of phosphorus. (
  • The scientists have discovered how the bacteria discriminate between nearly identical molecules of phosphate and arsenate. (
  • This doesn't mean that the arsenate doesn't get into the bacteria, it just shows that the bacterium has evolved to extract phosphate under almost any circumstances. (
  • Dear Rosie, Have you checked whether the bacteria in arsenate cultures are still viable? (
  • Arr Genes from Arsenate-Reducing Low G+C Gram Positive Bacteria Bacillus selenitireducens strain MLS10 and Clostridium sp. (
  • An extensive network of dipole-anion interactions, and of repulsive interactions, results in the 4% larger arsenate distorting a unique low-barrier hydrogen bond. (
  • The three ars genes conferred arsenite resistance in E. coli and arsenite as well as arsenate resistance in Bacillus subtilis. (
  • In this study, the genetic mapping of the tolerance of root growth to 13.3 mu M arsenate [As(V)] using the BalaxAzucena population is improved, and candidate genes for further study are identified. (
  • The Glutathione/Glutaredoxin System Is Essential for Arsenate Reduction in Synechocystis sp. (
  • Arr is an extraordinarily fast enzyme that approaches the diffusion limit ( K m = 44.6 ± 1.6 μM, k cat = 9,810 ± 220 seconds −1 ), and phosphate is a competitive inhibitor of arsenate reduction ( K i = 325 ± 12 μM). (
  • The inactivation of arsR also resulted in reduction of resistance to arsenite and antimonite, while arsenate resistance was unaffected. (
  • Aluminum arsenate at Chemister Chemistry of Arsenic, Antimony, and Bismuth, Edited by N. C. Norman. (
  • The arsenate, arsenite, and antimonite resistance was shown to be inducible by all three heavy metal ions. (
  • The influence of Zn(II) on the adsorption of arsenate ions on iron oxide was studied. (
  • In particular, cellular phosphate uptake systems face a challenge in arsenate-rich environments. (
  • We examined the periplasmic phosphate-binding proteins (PBPs) of the ABC-type transport system that mediates phosphate uptake into bacterial cells, including two PBPs from the arsenate-rich Mono Lake Halomonas strain GFAJ-1. (
  • Arsenate treatment decreased growth along with decline in nitrate (NO 3 − ) uptake and accumulation. (
  • Silicate supplementation under arsenate stress however, improved growth, repaired the arsenate-induced effects leading to an enhancement in nitrate (NO 3 − ) uptake and consequently improved nitrite (NO 2 − ) and amino acid contents as well. (
  • This Thesis describes the synthesis of two series of metal complexes that were evaluated as arsenate receptors and subsequent development of one of these receptors into a novel arsenate adsorbent. (
  • Conventional thinking suggests that ACZA components are stabilized in the wood by the precipitation of metal/arsenate complexes as the ammonia evaporates, but little work has been done to confirm this theory. (
  • The results of these experiments generally support the finding that arsenic fixation occurs by precipitation of metal/arsenate, complexes as ammonia evaporates from the treated wood. (
  • The conversion of physically adsorbed arsenate into monodentate surface complexes had Gibbs free energies of activation ranging from 62 to 73 kJ/mol, and Gibbs free energies of reaction ranging from -23 to -38 kJ/mol. (
  • For release of arsenate from uncharged bidentate complexes, energies of activation as high as 167 kJ/mol were encountered. (
  • However, the WT is about 8 times more sensitive to selenite than to arsenate, and the mutants were more resistant to selenite than arsenate by a factor of 2. (
  • It confers arsenate and arsenite resistance, which can be used as selective markers. (
  • This is rather unusual for an arsenate or even a phosphate class mineral. (
  • phosphate (PO4), arsenate (AsO4) and vanadate (VO4). (
  • Anhydrous form is known as an extremely rare, fumarolic mineral alarsite A synthetic hydrate of aluminium arsenate is produced by hydrothermal method. (
  • Enzymes that utilize phosphate, for example, have the same binding mode and kinetic parameters as arsenate, and the latter's presence therefore decouples metabolism. (
  • We intended to investigate the response of arsenate on nitrogen metabolism in wheat seedlings and aimed to assess the efficacy of silicon amendments in modulating the metabolic disturbances caused by arsenate stress. (
  • The nitrogen metabolism of wheat cultivated in different levels of arsenate with or without silicate in a medium supplemented with modified Hoagland's solution for 21 days was studied. (
  • Results therefore, imply the involvement of exogenous silicon amendments in relieving the metabolic alterations in nitrogen metabolism caused by arsenate stress that enabled wheat seedlings to adapt under arsenate excess and eventually promoted plant growth. (
  • Arsenate exposure also altered metabolism of main photosynthate, sucrose. (
  • Arsenates are used in some wood preservatives, finishing agents, and as reagents in various chemical reactions. (
  • 1.1 These test methods cover the determination of the chemical analysis of commercial fluor-chrome-arsenate-phenol. (
  • GFAJ-1 grew well on medium supplemented with ample phosphate but no arsenate (1500 μM PO 4 , +P/-As condition), indicating that GFAJ-1 is not obligately arsenate-dependent. (
  • The detailed structure of Pseudomonas fluorescens , the phosphate binding protein, showed that the arsenate molecule, which is slightly larger than phosphate, distorts and weakens bonds around a hydrogen atom that forms a bridge to the protein. (
  • The reaction energies and activation barriers for three modes of arsenate adsorption to ferric hydroxides were calculated. (
  • Farrell, J & Chaudhary, BK 2013, ' Understanding arsenate reaction kinetics with ferric hydroxides ', Environmental Science and Technology , vol. 47, no. 15, pp. 8342-8347. (
  • Here, we report the structure of an Arr complex (solved by X-ray crystallography to 1.6-Å resolution), which was enabled by an improved Arr expression method in the genetically tractable arsenate respirer Shewanella sp. (
  • Pharmacolite is also an arsenate mineral and the two are sometimes associated, but is otherwise unrelated to pharmacosiderite. (

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