DDT, DDE, and DDD was once widely used to control insects on agricultural crops and insects that carry diseases like malaria and typhus, but is now used in only a few countries to control malaria. Technical-grade DDT is a mixture of three forms, p,p-DDT (85%), o,p-DDT (15%), and o,o-DDT (trace amounts). All of these are white, crystalline, tasteless, and almost odorless solids. Technical grade DDT may also contain DDE (1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene) and DDD (1,1-dichloro-2,2-bis(p-chlorophenyl)ethane) as contaminants. DDD was also used to kill pests, but to a far lesser extent than DDT. One form of DDD (o,p-DDD) has been used medically to treat cancer of the adrenal gland. Both DDE and DDD are breakdown products of DDT.
In this study, the primary goal is to examine the relationship between DDT (dichlorodiphenyltrichloroethane) levels and the odds of loss of clinically-recognized pregnancies amongst women in Limpopo, South Africa. The initial protocol (which will be referred to as Part 1) planned to enroll 2,400 non-pregnant women, draw blood for measurement of DDT exposure, and follow 1,200 pregnant participants to ascertain occurrence of miscarriage. An initial two-year pilot of 850 non-pregnant women was proposed to evaluate field procedures, recruitment strategies and the reproducibility of DDT levels. Of the 444 women enrolled in the first 10 months of the pilot of Part 1, only 27 have become pregnant. Although the field procedures have been well executed, the number of pregnancies has been low. Based upon the experience to date, the approach taken so far is unlikely to generate enough pregnancies to monitor the occurrence of miscarriages. Therefore, the revised protocol (referred to as Part 2) will modify ...
The only horrible death and destruction that DDT caused was to insects. One of its side affects was to soften the eggshells of birds (most notably the Bald Eagle) who ingested DDT (through eating insects with DDT on them, or rodents who ate said insects). But, this was something that was discovered (by SCIENTISTS, btw) decades after DDT was introduced, and there is no way the people who invented DDT could know about that ...
TY - JOUR. T1 - Comparative CYP‐omic analysis between the DDT‐susceptible and ‐resistant Drosophila melanogaster strains 91‐C and 91‐R. AU - Seong, Keon Mook. AU - Coates, Brad S.. AU - Berenbaum, May R. AU - Clark, John M.. AU - Pittendrigh, Barry R.. PY - 2018/11. Y1 - 2018/11. N2 - BACKGROUND: Cytochrome P450 monooxygenases (P450s) are involved in the biosynthesis of endogenous intracellular compounds and the metabolism of xenobiotics, including chemical insecticides. We investigated the structural and expression level variance across all P450 genes with respect to the evolution of insecticide resistance under multigenerational dichlorodiphenyltrichloroethane (DDT) selection. RESULTS: RNA-sequencing (RNA-seq) and reverse transcriptase-quantitative polymerase chain reaction (RT-qPCR) indicated that the transcript levels of seven P450 genes were significantly up-regulated and three P450 genes were down-regulated in the DDT-resistant strain 91-R, as compared to the control strain 91-C. ...
According to the study results, DDT is the only World Health Organization (WHO)-recommended chemical that provides all three levels of protection if the disease-carrying mosquito is not resistant. Even where resistance to its toxic action exists, DDT still provides protection through its repellent and irritant actions. These findings have implications for controlling malaria, the biggest killer of African children. Most malaria infections are acquired when Anopheles mosquitoes enter homes at night and bite people. Anopheles mosquitoes are known to exhibit stronger behavioral responses to DDT and other chemicals than Aedes aegypti, so the transmission protection DDT provides against malaria is likely to be greater than 73 ...
Every year, 250 million people are infected with malaria, resulting in 880,000 deaths, primarily to African children under age five. Many malaria-endemic countries use Indoor Residual Spraying (IRS), the application of dichlorodiphenyl trichloroethane (DDT) or pyrethroid insecticides to interior walls of homes, to control malaria. Concerns regarding the unintended consequences of chronic, high-level DDT exposure have resulted in considerable international debate. For example, the Stockholm Convention on Persistent Organic Pollutants aims to ban DDT, while the World Health Organization and the U.S. Agency for International Development promote and/or fund IRS, including with DDT. DDT and pyrethroids are neurotoxicants in insects and animals. Human studies, primarily conducted in Western populations with low to moderate levels of exposure, suggest that prenatal exposure to DDT and its breakdown product, DDE, may adversely affect childrens neurodevelopment. DDT/E exposure has also been related to ...
So, it is your claim that someone in Africa died from malaria because they didnt have DDT, and DDT could have saved their life?. First, lets note the inherent, inescapable racism and cultural snobbery in this statement: Youre saying that, because Africans all read Rachel Carson and agreed with her (in error, you claim), they refused to use DDT, though DDT was freely available and cheap, and it would have saved their children? In other words, Africans are too stupid to look after themselves? Is that your claim?. Or do you just think everyone else is stupid enough to take the claim at face value without thinking this through?. 1. DDT use on a broadscale to fight malaria was stopped in 1965 by the World Health Organization, because overuse of DDT in agriculture had bred mosquitoes resistant to and completely immune to DDT. DDT was never removed from WHOs arsenal, and it has been used in a limited fashion since -- but your claim that Africans should have used DDT after it stopped being effective ...
Over 110 marine bacteria were isolated and tested for their ability to convert DDT to water-soluble products. Forty-seven were found to convert 5% to 10% of the 14C-DDT to water-soluble products, 38 solubilized less than 5% of the insecticide, and 29 were apparently inactive by the test methods employed. Mucor alternans, a fungus exceptionally active in producing water-soluble metabolites from DDT, was used as a model for determining the identities of the water-soluble metabolites. Although these compounds have not yet been identified, they are not DDT, DDA, DBH, DBP, PCPA, or 2-chlorosuccinic acid. Therefore, previously uncharacterized products are probably formed by M. alternans. The hypothesis that nutrient availability is limiting DDT degradation is now being tested. For this purpose natural microbial communities of sea water containing bottom sediments are being subjected to a large number of different treatments in an attempt either to enrich for DDT-degrading organisms or to provide the
References P Goll and B McCarton The World Health Organisation considers DDT safe to people and the environment when applied in the home for mosquito control. There has been little research to support this claim. Acute poisoning occurs when DDT is deliberately or inadvertently administered at a dose exceeding 10 ppm body weight.4 2 The central nervous system is affected, resulting in convulsions within 30 min to 6 hours and possibly unconsciousness. However, recovery is swift and without sequelae if appropriate remedial measures are taken. Chronic exposure to DDT after weaning appears harmless. Workers occupationally exposed to 0.25 ppm body weight/day for 25 years have shown no adverse clinical effects. Storage in adipose tissue is apparently innocuous and there in no unequivocal evidence that exposure has tumorogenic, carcinogenic or teratogenic effects. DDT can cause hepatic tumours in rats but the incidence of hepatic cancer in humans in the USA has declined steadily since 1930, despite ...
Le Programme des Nations Unies pour lenvironnement (PNUE) a entrepris une campagne malencontreuse visant à interdire le pesticide DDT en vertu de sa Convention-cadre sur les polluants organiques persistants (POP). Les pays tropicaux qui signent cette convention vont nuire gravement à la santé de leurs peuples. Le DDT est lagent le plus rentable jamais produit pour contrôler les maladies propagées par les mouches et les moustiques. LAcadémie nationale américaine des sciences naturelles estime que le DDT a permis de sauver 500 millions de personnes de la malaria avant 1970. En Inde, une pulvérisation efficace a quasiment éliminé la maladie dans les années 1960. Le nombre de cas de malaria a chuté de 75 millions en 1951 à 50 000 en 1961, et le nombre de décès est passé dun million dans les années 1940 à quelques milliers dans les années 1960. Les moustiquaires omniprésentes de mon enfance avaient disparu des villas en agglomération lorsque jentrai à luniversité à la ...
TY - JOUR. T1 - The organochlorine o,p-DDT plays a role in coactivator-mediated MAPK crosstalk in MCF-7 breast cancer cells. AU - Bratton, Melyssa R.. AU - Frigo, Daniel E.. AU - Chris Segar, H.. AU - Nephew, Kenneth P.. AU - McLachlan, John A.. AU - Wiese, Thomas E.. AU - Burow, Matthew E.. PY - 2012/9. Y1 - 2012/9. N2 - Background: The organochlorine dichlorodiphenyltrichloroethane (DDT), a known estrogen mimic and endocrine disruptor, has been linked to animal and human disorders. However, the detailed mechanism(s) by which DDT affects cellular physiology remains incompletely defined. Objectives: We and others have shown that DDT activates cell-signaling cascades, culminating in the activation of estrogen receptor-dependent and -independent gene expression. Here, we identify a mechanism by which DDT alters cellular signaling and gene expression, independent of the estrogen receptor. Methods: We performed quantitative polymerase chain reaction array analysis of gene expression in MCF-7 breast ...
According to research, prenatal exposure to DDT, a pesticide banned in 1972, may increase womens risk of high blood pressure decades later.
dichlorodiphenyltrichloroethane is understood for its pre-judicious result on the setting and life. However, the new kind was found to be more practical against insects and in smaller amounts, probably minimizing its environmental impact.. In continued to explore the crystal structure of insecticde, the researchers began learning fluorinated varieties of dichlorodiphenyltrichloroethane, swapping out atomic number 17 atoms for halogen.. They ready 2 solid varieties of the compound a mono fluoro and a difluoro analog and tested them on fruit flies and mosquitoes, as well as dipterous insect species that carry protozoal infection, black vomit, Dengue, and Zika.. The solid varieties of fluorinated dichlorodiphenyltrichloroethane killed insects a lot of quickly than did DDT; the difluoro analog, referred to as DFDT, killed mosquitoes 2 to fourfold quicker, the researchers aforesaid.. Speed thwarts the event of resistance, aforesaid NYU chemistry faculty member archangel Ward, a senior author on the ...
The more that is learned about the pesticide with the awesome name of dichlorodiphenyltrichloroethane, the more dangerous it seems to be. DDT has been accused of contributing to the virtual...
A Hydrogenomonas cleaved one of the rings of p,p-dichlorodiphenylmethane, a product of DDT metabolism, to yield p-chlorophenylacetate and further metabolized the latter compound. Products of microbial degradation of other diphenylmethanes were also identified. Substituents on the methylene-carbon and para-chloro substitution are critical factors governing resistance of DDT and related compounds to aerobic metabolism and decomposition by the bacterium. ...
Dichlorodiphenyltrichloroethane (DDT) is a persistent estrogenic organochlorine pesticide that is a rodent hepatic tumor promoter, with inconclusive carcinogenicity in humans. We have previously reported that o, p-DDT elicits primarily PXR/CAR-mediated activity, rather than ER-mediated hepatic responses, and suggested that CAR-mediated effects, as opposed to ER-mediated effects, may be more important in tumor promotion in the rat liver. To further characterize species-specific hepatic responses, gene expression analysis, with complementary histopathology and tissue level analyses were investigated in immature, ovariectomized C57BL/6 mice treated with 300 mg/kg o, p-DDT, and compared to Sprague-Dawley rat data. Rats and mice exhibited negligible histopathology with rapid o, p-DDT metabolism. Gene expression profiles were also similar, exhibiting PXR/CAR regulation with the characteristic induction of Cyp2b10 and Cyp3a11. However, PXR-specific target genes such as Apoa4 or Insig2 exhibited more
Alibaba.com offers 66 ddt powder products. About 18% of these are herbal extract, 16% are organic fertilizer, and 9% are christmas decoration supplies. A wide variety of ddt powder options are available to you, such as humic acid, paint, and chewing gum bases.
The DDT has been named after the better characterised DNA-binding homeobox- containing proteins and the Different Transcription and chromatin remodelling factors in which it is found. It is a domain of about 60 amino acids which is exclusively associated with nuclear domains like AT-Hook, PHD finger, methyl-CpG-binding domain, bromodomain and DNA-binding homeodomain.. The DDT domain is characterised by a number of conserved aromatic and charged residues and is predicted to consist of three alpha helices. A DNA-binding function for the DDT domain has been proposed [ (PUBMED:11246006) ]. ...
Agay-Shay K, Martinez D, Valvi D, Garcia-Esteban R, Basagaña X, Robinson O, et al. 2015. Exposure to endocrine-disrupting chemicals during pregnancy and weight at 7 years of age: a multi-pollutant approach. Environ Health Perspect 123:1030-1037, PMID: 25956007, 10.1289/ehp.1409049.. Ahdaya SM, Shah PV, Guthrie FE. 1976. Thermoregulation in mice treated with parathion, carbaryl, or DDT. Toxicol Appl Pharmacol 35:575-580, PMID: 817420.. Allison DB, Downey M, Atkinson RL, Billington CJ, Bray GA, Eckel RH, et al. 2008. Obesity as a disease: a white paper on evidence and arguments commissioned by the Council of the Obesity Society. Obesity (Silver Spring) 16:1161-1177, 10.1038/oby.2008.231.. Appleton BS, Shriver CN, Arnrich L, Hathcock JN. 1981. Effects of 3-methylcholanthrene and DDT on cholesterol 7 alpha-hydroxylase in rats. Durg-Nutr Interact 1(1):15-21, PMID: 6926812.. Arnold M, Pandeya N, Byrnes G, Renehan AG, Stevens GA, Ezzati M, et al. 2015. Global burden of cancer attributable to high ...
|BR| PURPOSE: To obtain a water-dispersible fine cellulose composition which readily redisperses into water upon stirring by drying a homogeneous dispersion obtained by dispersing a water-soluble gum and/or a hydrophilic substance into a dispersion of fine cellulose particles together with a oil or fat. |BR|CONSTITUTION: The composition is a dry composition produced by drying a homogeneous dispersion obtained by mixing 0.02-20 pts.wt. fat or oil with 100 pts.wt. composition comprising 20-98 pts.wt. fine cellulose particles and 2-80 pts.wt. water-soluble gum and/or hydrophilic substance. The composition has been regulated so that when it is redispersed into water, it gives a dispersion which has an average particle diameter of 8μm or smaller and in which the content of 10μm and larger particles is 40% or lower and the content of colloid fractions is 65% or higher. Since the composition contains a oil or fat having lubricity, it is easily dispersed into water even with low-shear stirring, without taking
A novel strategy was developed for the fluorescence detection of nitrite (NO2−) in real samples. The method is based on the reaction of water-dispersible graphite-like carbon nitride (w-g-C3N4) with nitrite (NO2−) in an acidic medium to form a new kind of weak fluorescence species. Under optimal conditions,
TY - JOUR. T1 - Highly water-dispersible biocompatible magnetite particles with low cytotoxicity stabilized by citrate groups. AU - Liu, Jia. AU - Sun, Zhenkun. AU - Deng, Yonghui. AU - Zou, Ying. AU - Li, Chunyuan. AU - Guo, Xiaohui. AU - Xiong, Liqin. AU - Gao, Yuan. AU - Li, Fuyou. AU - Zhao, Dongyuan. PY - 2009. Y1 - 2009. U2 - 10.1002/anie.200901566. DO - 10.1002/anie.200901566. M3 - Article. VL - 48. SP - 5875. EP - 5879. JO - Angewandte Chemie - International Edition. JF - Angewandte Chemie - International Edition. SN - 1433-7851. IS - 32. ER - ...
Provided are water-dispersible sulfopolyester compositions having relatively large proportions of pigments and/or fillers. Such compositions are useful as packaging materials and are substantially non-blocking when processed using packaging rolls and are comprised of at least one sulfopolyester as described herein, about 10 to about 75 weight percent of a pigment and/or filler, and a wax.
An estimated 1.5 million metric tons of DDT were used between the 1940s and the 1970s, when strict restrictions were placed on the chemicals worldwide. Though the
1. In rats poisoned with DDT there is an increase in the total metabolic rate.. 2. The increased metabolic rate is reflected in an increase in food and water intake and a slight loss in body weight.. 3. The oxygen uptake of liver slices from DDT poisoned rats is increased.. 4. In advanced DDT poisoning, slices taken from parts of the liver showing gross abnormalities have instead of an increased oxygen uptake a reduction below the control values.. 5. The oxygen consumption of sartorius muscles from frogs poisoned with DDT is increased.. 6. A significant increase in the respiration of the brain tissue has not been demonstrated.. 7. A known metabolite of DDT, di(p-chlorophenyl) acetic acid has been shown not to be responsible for the characteristic actions of DDT.. ...
Alshahrani S, Alvarez-Leefmans FJ, Di Fulvio M. 2012. Expression of the Slc12a1 gene in pancreatic β-cells: molecular characterization and in silico analysis. Cell Physiol Biochem 30:95-112.. Alwasel SH, Ashton N. 2009. Prenatal programming of renal sodium handling in the rat. Clin Sci (Lond) 117:75-84.. Aragon AC, Kopf PG, Campen MJ, Huwe JK, Walker MK. 2008. In utero and lactational 2,3,7,8-tetrachlorodibenzo-p-dioxin exposure: effects on fetal and adult cardiac gene expression and adult cardiac and renal morphology. Toxicol Sci 101:321-330.. Au CG, Butler TL, Sherwood MC, Egan JR, North KN, Winlaw DS. 2011. Increased connective tissue growth factor associated with cardiac fibrosis in the mdx mouse model of dystrophic cardiomyopathy. Int J Exp Pathol 92:57-65.. Barker DJ, Gluckman PD, Godfrey KM, Harding JE, Owens JA, Robinson JS. 1993. Fetal nutrition and cardiovascular disease in adult life. Lancet 341:938-941.. Barker DJ, Winter PD, Osmond C, Margetts B, Simmonds SJ. 1989. Weight in ...
One of the anti-environmental, anti-green false myths kicking around is that DDT is not harmful to humans, and therefore it probably shouldnt have been banned, and Rachel Carson was wrong. Reality is that DDT is a poison, but acute poisoning of large animals tends to take a lot. Insectivorous animals or their predators can get…
The invention relates to resin intermediates and their preparation. The invention also relates to hydroxyl-functional, water-dispersible polymers formed from the intermediates and compositions containing the water-dispersible polymers. A preferred composition of the invention is a zero volatile organic content (VOC), ambient-cure enamel composition which contains a hydroxyl-functional, water-dispersible polyester.
Many African countries have used DDT for mosquito control in indoor spraying programs, but the primary use of DDT on the continent has been as an agricultural insecticide. Consequently, in parts of west Africa especially, DDT resistance is now widespread in A. gambiae. But even if A. gambiae were not resistant, a full-bore campaign to suppress it would probably accomplish little, because this mosquito is so efficient at transmitting malaria. Unlike most Anopheles species, A. gambiae specializes in human blood, so even a small population would keep the disease in circulation. One way to get a sense for this problem is to consider the transmission index-the threshold number of mosquito bites necessary to perpetuate the disease. In Africa, the index overall is 1 bite per person per month. Thats all thats necessary to keep malaria in circulation. In India, by comparison, the TI is 10 bites per person per month ...
OBJECTIVES: Since the metabolism of the organochlorine pesticide dichlorodiphenyltrichloroethane (DDT) is not fully known in humans, we evaluated if circulating levels of a major breakdown product of DDT, p,p-DDE, were related to genome-wide genetic and methylation variation in a population-based sample. METHODS: In the population-based Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUS) study (1016 subjects all aged 70), circulating levels of p,p-DDE were analyzed by high-resolution chromatography coupled to high-resolution mass spectrometry (HRGC/HRMS). Genetic variants were genotyped and imputed (1000 Genomes reference, March 2012 release). Methylation sites were assayed using the Illumina HumanMethylation450 array in whole blood. A genome-wide association study (GWAS) approach was applied. RESULTS: Evidence for genome-wide significant association with p,p-DDE levels was observed only for a locus at chromosome 19 corresponding to the CYP2B6 gene (lead SNP rs7260538). Subjects
Canadian researchers have found that the toxic pesticide DDT still is having damaging effects on birds despite being banned in the United States and Canada for the past three decades. Andrew Iwaniuk, lead author of a study published in Behavioural Brain Research (online July 7, 2006, The effects of environmental exposure to DDT on the brain of a songbird: Changes in structures associated with mating and song) reported that robins eggs that had been exposed to the pesticide during development resulted in birds with up to 30 percent less tissue in certain areas of their brains. As a result, they were unable to sing complicated songs, defend their territory or build nests properly. Iwaniuk, who is with the Department of Psychology at the University of Alberta, estimated that at least 15 to 20 generations of robins have been adversely affected since the pesticide was first applied ...
Six years ago, the World Bank promised to spend $300-500 million on malaria control in Africa. However, according to a study in The Lancet, the Bank has bungled the job.. The malaria experts who conducted the study said that the Bank actually spent perhaps $100 million worldwide, cut the number of recipient countries in half, and claimed progress where there was none. By counting eight months as a year, the Bank made it look like its programs had suddenly slashed malaria cases by 60% in Brazil. Refusing to provide evidence to support claims that are sharply contradicted by other data, it also said that Bank programs had dramatically reduced Indias malaria deaths in just one year.. It refuses to spend Bank money on DDT in Eritrea, where thousands die from malaria every year, even though this chemical has reduced malaria by 75% in at least four African countries. The Bank bought 100 million doses of chloroquine for use in India, where this drug fails to work 15-45% of the time and children die as ...
Further details about the negotiations:. At 7:28 am on Sunday, 10 December 2000, the delegates in Johannesburg, South Africa, approved a treaty allowing for the continued use of DDT in disease vector control as the United Nations Environment Program concluded the fifth and FINAL round of negotiations on a treaty to ban persistent organic pollutants. The official mandate of the treaty was to reduce and/or eliminate twelve POPs, of which DDT was one. This led groups such as Greenpeace, World Wildlife Fund, Physicians for Social Responsibilty and over 300 other environmental organizations to advocate for a total DDT ban, starting as early as 2007 in some cases. Although the open letter you signed made considerable progress in persuading these environmental groups to change their views, it was only the diplomats and delegates of 120 countries at the Johannesburg negotiations who could take the final decision. I am delighted to report to you that They decided that DDT is a unique case, and whereas ...
Dear EarthTalk: I understand there is good news about the recovery of bird species like the Peregrine Falcon, Bald Eagle and others owed to the 1972 ban on DDT.
Silent Spring catalyzed an environmental movement in the 1960s and achieved a ban on DDT, but are the alternatives any less toxic? Rachel Carsons eloquent book Silent Spring stands as one of the most important books of the twentieth century and inspired important and long-lasting changes in environmental science and government policy. Frederick Rowe Davis thoughtfully sets Carsons study in the context of the twentieth century, reconsiders her achievement, and analyzes its legacy in light of toxic chemical use and regulation today. Davis examines the history of pesticide development alongside the evolution of the science of toxicology and tracks legislation governing exposure to chemicals across the twentieth century. He affirms the brilliance of Carsons careful scientific interpretations drawing on data from university and government toxicologists. Although Silent Spring instigated legislation that successfully terminated DDT use, other
One can only hope. I wonder if mrgybe will ever try to make a point without insults, belittling those who disagree with him, or outright slander? By the numbers. While mrgybe knows much about efforts for malaria control in Africa, and is willing to share it in little bits and pieces, sprinkled with insults, he doesnt know much about contaminant chemistry, or DDT toxicity, and doesnt appear to be much interested in learning. His approach throughout his responses has been to start with slander and insults, and gradually evolve his story with either more information or minor corrections when his misstatements are pointed out. He has finally evolved a position which is clear, although it still has two logic leaps in it: he is angry that the banning of DDT in this country led to a limitation in aid for malaria control with DDT. The three problems with that position are 1) he ignores or belittles the opinions of others that DDT should only be used as a last resort; 2) he ignores the availability of ...
DDT, the first modern pesticide, has been banned in the United States since 1972 but it is still commonly used in places where malaria is prevalent. The United Nations recommends it because it is far less harmful to people than malaria is and remains superior to replacements.
The attacks on Carson were undertaken by tobacco industry lobbyists, seeking (among other things) to pressure the World Health Organization not to undertaking anti-smoking campaigns in poor countries. Our primary targets were Steven Milloy and Roger Bates Africa Fighting Malaria organization.. Whether due to our efforts or not, the DDT ban myth seems mostly to have died. Milloy, whose links to tobacco have thoroughly discredited him, seems to be out of the pundit business altogether. He still has an adjunct perch at the Competitive Enterprise Institute but his web page there shows only two opinion pieces since 2008. AFM is also quiescent - its website doesnt show any research activity since 2011 and its staff all appear to have paying jobs in free-market thinktanks, suggesting a zombie organization.. But the zombie plague always recurs and just now Ive seen (via Ed Darrell) another instance, oddly enough in an environmentalist magazine Greener Ideal. The author, one Mischa Popoff is described ...
A new generation of scientists have uncovered barrels containing DDT, a toxic pesticide banned decades ago, dumped into the deep ocean.
The International Agency for Research on Cancer (IARC) is currently comprised of 26 experts from 13 countries. Not only did their report label the chemicals as carcinogens, but it also listed the types of cancer most likely to be encountered from their use; Lindane - Non-Hodgkin Lymphoma (NHL) - DDT - Liver, Breast, and Testicular Cancer, as well as a suppressed immune system. While the warnings for the herbicide 2,4-D were less alarming, the researchers still called 2,4-D possibly carcinogenic, and reported that it caused oxidative stress as well as a suppressed immune response, both of which are known to support the development of cancer.. Coupled with the recent listing of glyphosate as carcinogenic, this latest IARC report is likely to have many repercussions throughout the world. Several countries have already banned import or sale of glyphosate within their borders due to health concerns.. Properly applied, this new awareness could result in healthier food for all mankind. Hopefully it is ...
210). Visual inspection of empirical. cross-sectional data in 2003 and 2009 shows no obvious decreasing trend between 2003 and 2009, and especially in cross-sectional data of 2009, no significant difference for the human body burdens in pools of different age groups, except for the youngest cohort that is likely exposed by breastfeeding (see Supplementary material, Fig. S1-n). The modeled intrinsic elimination half-life for p,p′-DDT is about 115 years, which is much longer than that estimated by Ritter et al. (2009). However, the intrinsic elimination half-life could be unresolvable by our model fitting procedure because of ongoing low-level exposure to fresh DDT, which was also indicated by our modeled intake trend of p,p′-DDT showing an almost unchanged intake levels (see Supplementary material, Fig. S1-n). Mueller et al. (2008) speculated that the decline in DDT contamination in human milk in Australia slowed after the 1980s due selleck to new selleck screening library input via long ...
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Yes they are, in more than one way. Heres the story - it has a few moving parts. A sample of Swisher Sweets little cigars we tested recently was heavily contaminated with DDT, one of the most dangerous substances on earth, and totally illegal at any level in any product - except tobacco products, which…
Complete information for DDIT4L gene (Protein Coding), DNA Damage Inducible Transcript 4 Like, including: function, proteins, disorders, pathways, orthologs, and expression. GeneCards - The Human Gene Compendium
I spent yesterday wanting to write a poem Instigated by some of the many Things Ive watched you throw away. I found my chicory coffee At the back of the cupboard But it tasted of bugs And DDT It raised thoughts of you Hating the daylight Disgusted with yourself Scuttling in the dark Caught on…
Fibrous products are disclosed containing an additive composition. The additive composition, for instance, comprises a water-soluble film forming component, a first water-soluble modifier component and a hydrophobic polymer component. In some aspects, the additive composition further comprises an additional water-soluble modifier component. The additive composition may be incorporated into the fibrous web by being combined with the fibers that are used to form the web. Alternatively, the additive composition may be topically applied to the web after the web has been formed. In one aspect, the additive composition may be applied to the web as a creping adhesive during a creping operation. The additive composition may improve the perceived softness of the web without substantially affecting the absorbency of the web in an adverse manner.
Expectant mothers lifestyles and environment could have a major impact on their sons sperm counts, a study has found. A review of existing research by Professor Richard Sharpe of the Queens Medical Research Institute in Edinburgh has shown that several lifestyle and environmental factors, including smoking, obesity and exposure to chemicals and pollutants, could cause damage to both prenatal and adult testes. Professor Sharpe also found that damage occurring during pregnancy could be irreversible. This is because exposure to toxins in the womb cuts sertoli cell numbers - cells needed to nurse young sperm to maturity during a mans adult life. But he found no evidence that environmental chemicals like pesticides, food additives or persistent organic pollutants, such as dichlorodiphenyltrichloroethane (DDT), affected sperm counts in most adult men. A study of the after-effects of a major chemical leak from an Italian factory showed no significant effect of sperm count of men who were adults ...
In the 20th century, there have been three major stages in the understanding of malaria: (i) a period of discovery, beginning in the late 19th century, which defined the parasite life cycle and identified the parasites that infect humans; (ii) a worldwide malaria eradication program, based on massive use of chloroquine (CQ) and dichlorodiphenyltrichloroethane (DDT), which began in the 1950s and continued for 20 years until it was acknowledged as a failure in the 1970s; and (iii) an era of active scientific investigation that began with development of the in vitro culture system for Plasmodium Falciparum and permitted the application of advances in molecular biology, cell biology, and immunology to malaria in the 1980s and 1990s. This chapter begins by reviewing these three stages. It then examines the biologic and public health reasons that malaria remains a major problem in Southeast Asia, South America, and sub-Saharan Africa at a time when it has been possible to eradicate or control smallpox, polio,
Estrogen-like chemicals are unique compared to nonestrogenic xenobiotics, because in addition to their chemical properties, the estrogenic property of these compounds allows them to act like sex hormones. Whether weak or strong, the estrogenic response of a chemical, if not overcome, will add extra estrogenic burden to the system. At elevated doses, natural estrogens and environmental estrogen-like chemicals are known to produce adverse effects. The source of extra or elevated concentration of estrogen could be either endogenous or exogenous. The potential of exposure for humans and animals to environmental estrogen-like chemicals is high. Only a limited number of estrogen-like compounds, such as diethylstilbestrol (DES), bisphenol A, nonylphenol, polychlorinated biphenyls (PCBs), and dichlorodiphenyltrichloroethane (DDT), have been used to assess the biochemical and molecular changes at the cellular level. Among them, DES is the most extensively studied estrogen-like chemical, and therefore ...
TY - JOUR. T1 - Prenatal and postnatal exposure to DDT by breast milk analysis in Canary Islands. AU - Vall, Oriol. AU - Gomez-Culebras, Mario. AU - Puig, Carme. AU - Rodriguez-Carrasco, Ernesto. AU - Gomez Baltazar, Arelis. AU - Canchucaja, Lizzeth. AU - Joya, Xavier. AU - Garcia-Algar, Oscar. PY - 2014/1/8. Y1 - 2014/1/8. N2 - Introduction: The use of p,p′-dichlorodiphenyltrichloroethane (DDT) has been banned since the late 1970s due to its toxicity. However, its long half-life makes it persistent in the environment and, consequently, almost everyone has DDT residues in the body. Human milk constitutes an ideal non-conventional matrix to investigate environmental chronic exposure to organochlorine compounds (OCs) residues. The study aimed to identify potential population risk factors of exposure to DDT due to the proximity to countries where it is still used. Methods: Seventy-two consecutive lactating women were prospectively included in Tenerife, Canary Islands (Spain). A validated ...
摘要. A new method of preparing water-dispersible silicon quantum dots (QDs, blue spheres) has been developed by using an organic peroxide as a highly effective precursor (the lower left quarter, red and grey-green ball-and-stick model). The obtained water-dispersible carboxylic acid terminated Si QDs displayed strong and stable photoluminescence in the visible spectrum, which can be widely used in boimedical imaging. For more detail, see the Communication by S.-T. Lee, P.-F. Wang et al. on page 12872 ff.. ...
Phytosterol, Water-Dispersible is a spray-dried blend of gum arabic, emulsifier and soybean phytosterol. This product appears as a super-micronized powd...
The invention is concerned with novel water-dispersible copolymers which contain at least one UVA light-absorbing monomer, one UVB light-absorbing monomer, one hydrophilic monomer, and optionally one hydrophobic monomer component. The UVA light-absorbing monomer absorbs at λmax ultraviolet light in the 320-400 nm range. The UVB light-absorbing monomer absorbs at max ultraviolet light in the 290-320 nm range. Because of the R3 group used in the invention, the copolymers of the invention permit higher loading of UV monomers than previously obtainable.
The effectiveness of DDT and other insecticides when properly used as indoor residual spray (IRS) to combat malaria is not in question [1]. However, the high body burden of DDT of those protected is very high [2], and the human health consequences due to IRS insecticides of those protected are of great concern [1-3]. What may be questioned though are the effectiveness, health impacts, social consequences, and sustainability of some IRS alternatives. Many promising silver bullets (using anything but IRS) to beat malaria over the last number of decades have come and gone. Yet, the one proven method, IRS, gets less recognition or attention. IRS interrupts transmission where most infections occur - the home. It is also at home where those most likely to suffer malaria - babies, children and pregnant mothers - are to be found. The negative part of the IRS message though, remains the inevitable co-exposure of the very same susceptible groups to IRS insecticides. Protection by IRS comes at a cost, ...
MONDAY, Dec. 30, 2019 (HealthDay News) -- Decades-banned pesticides apparently continue to interfere with fetal growth during U.S. pregnancies, a new study reports.. DDT was banned in 1972 in the United States, but low levels of it and other organic chemical pollutants can still be found in the blood of pregnant American women, researchers reported online Dec. 30 in JAMA Pediatrics.. Women carrying even low levels of these pollutants had slightly smaller fetuses than women whose exposure to the chemicals was less, results showed.. The most consistent effects seemed to come from DDT and related pesticides, said study co-author Pauline Mendola, an investigator at the U.S. National Institute of Child Health and Human Development.. Bones seem to be more affected, she said. Head circumference and femur length were more often impacted than other growth measures.. This study looked at persistent organic pollutants -- chemicals once used in agriculture, pest control, manufacturing and industrial ...
MONDAY, Dec. 30, 2019 (HealthDay News) -- Decades-banned pesticides apparently continue to interfere with fetal growth during U.S. pregnancies, a new study reports.. DDT was banned in 1972 in the United States, but low levels of it and other organic chemical pollutants can still be found in the blood of pregnant American women, researchers reported online Dec. 30 in JAMA Pediatrics.. Women carrying even low levels of these pollutants had slightly smaller fetuses than women whose exposure to the chemicals was less, results showed.. The most consistent effects seemed to come from DDT and related pesticides, said study co-author Pauline Mendola, an investigator at the U.S. National Institute of Child Health and Human Development.. Bones seem to be more affected, she said. Head circumference and femur length were more often impacted than other growth measures.. This study looked at persistent organic pollutants -- chemicals once used in agriculture, pest control, manufacturing and industrial ...
University of Illinois researchers have identified a key detoxifying protein in Anopheles mosquitoes that metabolizes DDT, a synthetic insecticide used since World War II to control the mosquitoes that spread malaria.
From their near-death beds, the Pro Wrestling Guerrilla Board of Directors have announced that the DDT4 First Round matches, along with the tournament brackets, will remain secret. This means that the fans, as well as tournament competitors, will not know which teams will be squaring off until they are actually in the ring with each other. The Board of Directors feels this will allow for the best overall tag teams to advance in, and ultimately win, the DDT4 tournament. While this blind bracketing system may seem to put the nerdlier teams (teams that heavily favor research and preparation) at a disadvantage, those teams will just have to prepare seven distinct First Round game plans instead of just one. But really, nerds love planning, so its a win-win ...
From their near-death beds, the Pro Wrestling Guerrilla Board of Directors have announced that the DDT4 First Round matches, along with the tournament brackets, will remain secret. This means that the fans, as well as tournament competitors, will not know which teams will be squaring off until they are actually in the ring with each other. The Board of Directors feels this will allow for the best overall tag teams to advance in, and ultimately win, the DDT4 tournament. While this blind bracketing system may seem to put the nerdlier teams (teams that heavily favor research and preparation) at a disadvantage, those teams will just have to prepare seven distinct First Round game plans instead of just one. But really, nerds love planning, so its a win-win ...
Kirsten Weir has an excellent article in Salon on DDT and Rachel Carson. Weir took the time to talk to actual scientists and found:
Antes do DDT, a malaria fora eliminada con éxito ou reducida en varias áreas tropicais ao eliminar ou envelenar as zonas húmidas onde se reproducen os mosquitos e crían as larvas, por exemplo, as zonas con charcas ou augas estancadas. Estes métodos foron pouco aplicados en África durante máis de medio século.[131] Segundo o CDC de EUA, estes métodos non son prácticos en África porque o Anopheles gambiae, un dos vectores principais da malaria en África, reprodúcese en numerosas pequenas pozas de auga que se forman pola chuvia ... É difícil, se non imposible, predicir cando e onde se formarán os sitios de reprodución, e encontralos e tratalos antes de que emerxan os adultos.[132]. A relativa efectividade da fumigación residual de interiores fronte a outras técnicas de control da malaria (por exemplo, mosquiteiros para as camas ou acceso rápido a fármacos antimaláricos) varía e depende das condicións locais.[30]. Un estudo da OMS de 2008 indica que a distribución en masa ...
Differing lipid contents of the animals play a relevant role in determining the differences in persistent pollutant levels which exist among them, and in particular the interindividual differences observed in the same species usually depend on this factor. In addition, the distribution of fat at intraindividual level determines the disposition of contaminants in any given individual. Cod liver, crustaceans cuticles, and, in general, tissues rich in lipids, such as the blubber of marine mammals, may contain DDT, PCB, PCDD, and PCDF concentrations many orders of magnitude higher than the muscle flesh. Intraindividual variation is responsible for the seasonal dependence of such pollutant levels, which are higher during the spring spawning period than in autumn. It has been determined that a large proportion of herring (Clupea harengus) fat reserves are used up during spawning. This influences to a large extent the organisms energy reserves and indeed total DDT levels. Concentrations of PCBs and ...
Free Online Library: DDT and its metabolites alter gene expression in human uterine cell lines through estrogen receptor-independent mechanisms. by Environmental Health Perspectives; Health, general Environmental issues
...A study led by researchers at the Johns Hopkins Bloomberg School of Pu... Both fetal motor activity and heart rate reveal how the fetus is matu...For the study DiPietro and her colleagues followed a sample of 50 hig...According to the findings all participants had detectable concentrati...,Fetal,neuromaturation,associated,with,mothers,exposure,to,ddt,and,other,environmental,contaminants,biological,biology news articles,biology news today,latest biology news,current biology news,biology newsletters
Buy Determinants of Micronutrient Status, DDT Residues and Pregnancy Outcomes: Cross-Sectional Studies in Pregnant and Post Partum Women from Maela Refugee Camp, North-Western Thailand by Wolfgang Stutz from Waterstones today! Click and Collect from your local Waterstones or get FREE UK delivery on orders over £20.
0060] 40 parts of pyribencarb, 4 parts of sodium alkyl sulfate, 5 parts of sodium lignin sulfonate, and 51 parts of calcium carbonate were mixed, and ground with a high-speed airflow-assisted grinder so that the mean particle size of the ingredients could be 7 μm. Next, 15 parts of water was added to 100 parts of the ground particles, and further kneaded. At the time when the added water had penetrated into the whole mixture, the kneaded mixture was granulated with a horizontal extrusion-type screw-extrusion granulator. The screen used in extrusion granulation had pores 3,000 μm in diameter. The obtained granules were dried in a fluidized bed drier at a hot air temperature of 55° C. for about 20 minutes until the intralayer temperature could reach 55° C. Subsequently, using a frame-type pulverizing apparatus having three pairs of toothed rolls arranged in upper, middle and lower three stages so as to be in parallel to the ground and having a slot above the rolls, the dried granules were led ...
TY - JOUR. T1 - Synthesis and antiviral evaluation of polyhalogenated imidazole nucleosides. T2 - Dimensional analogues of 2,5,6-trichloro-1-(β-D-ribofuranosyl) benzimidazole. AU - Chien, Tun Cheng. AU - Saluja, Sunita S.. AU - Drach, John C.. AU - Townsend, Leroy B.. PY - 2004/11/4. Y1 - 2004/11/4. N2 - A series of polyhalogenated imidazole nucleosides were designed and synthesized as ring-contracted analogues of 2,5,6-trichloro-1-(β-D- ribofuranosyl)benzimidazole (TCRB) and its 2-bromo analogue (BDCRB) in an effort to explore the spatial limitation of the active pocket(s) in the target protein(s). 2,4,5-Trichloro-, 2-bromo-4,5-dichloro-, and 2,4,5-tribromoimidazole nucleosides were prepared by a condensation of the preformed heterocycles with the appropriate sugar precursors. The ribofuranosyl and xylofuranosyl analogues were prepared by a direct glycosylation using the Vorbruggens silylation method and provided exclusively the β-anomers. The arabinofuranosyl analogues were prepared by the ...
2,2,2-Trichloro-1-(1-methyl-1H-pyrrol-2-yl)-1-ethanone chemical properties, What are the chemical properties of 2,2,2-Trichloro-1-(1-methyl-1H-pyrrol-2-yl)-1-ethanone 21898-65-7, What are the physical properties of 2,2,2-Trichloro-1-(1-methyl-1H-pyrrol-2-yl)-1-ethanone ect.
What is detoxification? In functional medicine, detoxification is often considered biotransformation because our bodies will transform harmful substances into less harmful substance and then excrete them from the body. This process can vary in effectiveness in different people depending on the nutrients we ingest, our genetics, and what types of toxins we are exposed to. For example, if we are exposed to persistent organic pollutants, which are so complex that they recirculate over and over in our bodys detoxification process, they can slow everything down, not allowing a person to properly detox the everyday exposures like mercury from dental fillings or alcohol. Persistent organic pollutants include things like dioxins, DDT, and PCBs. DDT is an insecticide that was banned from the US in 1972. My mom has told me many stories of how she and her friends and siblings used to run behind the trucks that were spraying DDT when she was growing up in the 60s because they all liked the smell of it! ...
Summary The authors present the results of the investigations which have been made in Chile on Chagas' disease to December 31, 1947.. In systematic epidemiological surveys made upon representative samples of the zones infected by the endemic, 12,581 persons have been examined, of whom 12 per cent revealed infestation by T. cruzi. The human cases proven parasitologically, reached 1,631 cases, distributed from Tarapacá to O'Higgins. A total of 8,142 Machado-Guerreiro reactions have been made, with 17 per cent positive. A total of 4,006 domestic and wild animals have been examined, which showed 10 per cent positive on xenodiagnosis. Of 20, 614 examples of T. infestans collected in diverse zones of the country, 44.4 per cent were found to be infected by T. cruzi.. The profilaxis of Chagas' disease was undertaken by means of the application of DDT on a large scale in the rural zones; the treatment of 830 houses with 5 per cent DDT in kerosene showed that the multiplication of ...
Organochlorines are lipophylic molecules that accumulate in the fat where they remain for years. During weight loss, they are mobilized and their concentration increases in blood. The present work tests, in transgenic estrogen-reporter mice (ERE-tK-LUC), whether this increase is sufficient to modulate the estrogen receptors (ERs) in the whole body. Three weak estrogens were studied: p,p DDT [1,1,1-trichloro2,2-bis(p-chlorophenyl) ethane], p,p DDE [1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene], and betaBHC [beta-benzene-hexachloride]. Dose-dependent analysis of reporter expression (luciferase) were performed in tissues of acutely treated mice. A body snap of ER activation was obtained. All these chemicals modulated the reporter, although with a different efficiency and depending upon the tissue analyzed. Induction was confirmed in the liver by determining the expression of the endogenous progesterone receptor (PR) gene, at the dose and time point at which the luciferase gene was maximally ...
http://www.youtube.com/watch?v=-UiCSvQvVys My latest for Yale Environment 360: Any time a writer mentions Rachel Carsons 1962 book Silent Spring or the subsequent U.S. ban on DDT, the loonies come out of the woodwork. They blame Carsons book for ending the use of DDT as a mosquito-killing pesticide. And because mosquitoes transmit malaria, that supposedly makes her…
November 11, 2009 , 4 minute read WASHINGTON, D.C. - Secretary of the Interior Ken Salazar, Assistant Secretary for Fish and Wildlife and Parks Tom Strickland and U.S. Fish and Wildlife Service Director Sam Hamilton today announced that the brown pelican, a species once decimated by the pesticide DDT, has recovered and is being removed from the list of threatened and endangered species under the Endangered Species Act. At a time when so many species of wildlife are threatened, we once in a while have an opportunity to celebrate an amazing success story, Salazar said. Read the full story.... ...
Acetic acid, ((p-chlorophenyl)sulfonyl)-, compd. with 2,2,2-nitrilotris(ethanol) (1:1) | C14H22ClNO7S | CID 55679 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
Indole, 1-(bis(2-(dimethylamino)ethyl)amino)-5-chloro-3-(p-chlorophenyl)-, dihydrochloride | C22H30Cl4N4 | CID 42527 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
2033-69-4 - JWKLKVSBAUXWEZ-UHFFFAOYSA-N - Piperazine, 1-(p-chlorophenyl)-4-(4-(o-tolyloxy)butyl)- - Similar structures search, synonyms, formulas, resource links, and other chemical information.
23904-87-2 - KBNOGJIHESRQCG-UHFFFAOYSA-N - Ketone, beta-(p-chlorophenyl)phenethyl 4-(o-tolyl)piperazinyl - Similar structures search, synonyms, formulas, resource links, and other chemical information.
4-(p-Chlorophenyl)-1-(p-tolylsulfonyl)piperidine-4-carboxylic acid/ACM84254988 can be provided in Alfa Chemistry. We are dedicated to provide our customers the best products and services.
Organochlorine (OC) pesticides have recently been associated with type 2 diabetes in several non-Asian general populations. As there is currently an epidemic of type 2 diabetes mellitus in Asia. The prevalence and incidence of diabetes is increasing rapidly worldwide including many Arab Gulf countri …
When DDT was introduced more than 60 years ago, it initially scored victory after victory in the fight against malaria - nearly eliminating the deadly disease in many areas. But these wins were mostly short-lived, as mosquitoes rapidly developed resistance to the chemical. Today, its effectiveness is a fraction of what it once was; meanwhile an arsenal of better and safer anti-malaria interventions has been developed, including effective chemical-free strategies.. And so, under the auspices of the Stockholm Convention, the nations of the world have committed to phasing out DDT, while allowing it to be used in the short-term in those few places where its still effective and other methods of malaria control are unavailable. This is an approach PAN enthusiastically supports.. ...
Piecemeal, and at long last, chemical manufacturers have begun removing the endocrine-disrupting plastic bisphenol-A (BPA) from products they sell. Sunoco
Nineteen pairs of gaseous and surface seawater samples were collected along the cruise from Malaysia to the south of Bay of Bengal passing by Sri Lanka between April 12 and May 4, 2011 on the Chinese research vessel Shiyan I to investigate the latest OCP pollution status over the equatorial Indian Ocean. Significant decrease of α-HCH and γ-HCH was found in the air and dissolved water phase owing t ...
Only in a healthy environment can we feel completely at ease. It is important that living and working areas are free from pollutants which can strain the human body and lead to long-term diseases. A comprehensive assessment of pollutants is therefore indispensable for any renovation. For the sake of users and construction workers health, we must be aware of the risks that can arise in buildings unbeknownst to its occupants. Many substances which had been commonly used in former building materials can be harmful to health and cause illness. Lindners analytical evaluation of building material samples and room air measurements provides information as to whether the legal limits have been exceeded and a rehabilitation has to be carried out. A brief list of the most frequently encountered pollutants are given below. The full list is far longer, so before any demolition work takes place it is essential to involve a certified refurbishment specialist who can classify the risks and requirements for ...
The WHO acknowledged that it would probably be criticized by environmental groups. Kochi said that malaria was a huge killer in Africa. I am here today to ask you, please help save African babies as you are helping to save the environment. African babies do not have a powerful movement . . . to champion their well-being, he told environmentalists ...
In the first half of the show, astrologer and dowser Cece Stevens talked about the upcoming Crystal Skulls Festival /World Mysteries Conference, which she organized. In the latter half of the show, investigative reporter Linda Moulton Howe discussed the invasion of DDT-resistant super bed bugs in America, and the discovery of 12,000 year old circles of limestone columns found in Turkey.
1. The specificity of intracellular Ca2+ stores to Ca2+-mobilizing agonists was studied in DDT1 MF-2 vas deferens cells of the Syrian hamster.. 2. Application of histamine (100-mu-M or ATP (100-mu-m) to the DDT, MF-2 cells caused an initial increase of intracellular Ca2+ followed by a lower phase as measured by using Indo-1 as fluorescent probe at 22-degrees-C. The basal Ca2+ level (146 nM) was enhanced to 309 nm by histamine and to 379 nM by ATP.. 3. A transient rise in intracellular Ca2+ lasting for about 2 min was measured in the presence of histamine or ATP in the absence of extracellular Ca2+. The basal Ca2+ level (78 nm) was increased to 128 nm by histamine and to 145 nm by ATP.. 4. A transient hyperpolarization was elicited in single cells as measured with microelectrodes by both agonists under Ca2+-free conditions with a similar time course as the change in internal Ca2+ . The hyperpolarization observed in the presence of histamine amounted to 23 mV and 31 mV with ATP. The ...
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An examination of actual data, however, thoroughly debunks Carsons claim. This can be seen in Table 1, which compares the Audubon Societys Christmas Bird Count data for 1941 (before DDT) to that of 1960 (the height of DDT, shortly before the publication of Silent Spring).[39]. It can be seen that far from declining, the number of birds encountered by each observer nearly quadrupled over the period in question. In the case of the robin, singled out by Carson as the tragic symbol of the fate of the birds,[40] the population count increased twelvefold.. Many other studies show the same pattern of sharp increase of some bird populations during the DDT years. For example, a bird sanctuary that has been counting birds over Hawk Mountain, Pennsylvania since the 1930s reported an increase in sightings of ospreys from less than 200 in 1945 to over 600 by 1970, and an increase in sightings of migrating raptors from 9,291 in 1946 to 29,765 in 1968.[41] The herring gull population on Tern Island, ...
Sustainability is protecting the environment, working well with others, and being excellent at what we do.. Innovators in eco-friendly business, customer satisfaction, and leadership.. Your convenience is our specialty including chemically free options. ...
Jay Ambrose retired from editing newspapers, and now writes commentary for the Scripps News chain of papers. Because of his experience in editing, I was suprised to see his commentary from last week which takes broad, inaccurate swipes at environmental groups (here from the Evansville, Indiana, Courier & Press). Ambrose is victim of the DDT…
Jay Ambrose retired from editing newspapers, and now writes commentary for the Scripps News chain of papers. Because of his experience in editing, I was suprised to see his commentary from last week which takes broad, inaccurate swipes at environmental groups (here from the Evansville, Indiana, Courier & Press). Ambrose is victim of the DDT…
Jay Ambrose retired from editing newspapers, and now writes commentary for the Scripps News chain of papers. Because of his experience in editing, I was suprised to see his commentary from last week which takes broad, inaccurate swipes at environmental groups (here from the Evansville, Indiana, Courier & Press). Ambrose is victim of the DDT…