نتایج جستجو برای: toxaphene
تعداد نتایج: 149 فیلتر نتایج به سال:
1 These authors contributed equally to the study. ABSTRACT Pregnane X receptor (hPXR, NR1I2) is activated by various chemically unrelated compounds, including environmental pollutants and drugs. We proceeded here to in vitro screening of 28 pesticides with a new reporter system that detects hPXR activators. The cell line was obtained by a two-step stable transfection of cervical cancer HeLa cel...
The Arctic has been contaminated by legacy organochlorine pesticides (OCPs) and currently used pesticides (CUPs) through atmospheric transport and oceanic currents. Here we report the time trends and air-water exchange of OCPs and CUPs from research expeditions conducted between 1993 and 2013. Compounds determined in both air and water were trans- and cis-chlordanes (TC, CC), trans- and cis-non...
Recent studies of contaminants under the Canadian Northern Contaminants Program (NCP) have substantially enhanced our understanding of the pathways by which contaminants enter Canada's Arctic and move through terrestrial and marine ecosystems there. Building on a previous review (Barrie et al., Arctic contaminants: sources, occurrence and pathways. Sci Total Environ 1992:1-74), we highlight new...
Rats were used to study the general activity and the isoenzyme spectrum of lactate dehydrogenase (LDH) during single-instance and long-term introduction of polychlorocamphene. Total lactate dehydrogenase activity decreases in the liver during the single-instance introduction of half the LD50 (120 mg/kg). The isoenzyme spectrum of LDH is characterized by an increase in the quantity of LDH1, LDH2...
The main objective of the IPCS is to carry out and disseminate evaluations of the effects of chemicals on human health and the quality of the environment. Supporting activities include the development of epidemiological, experimental laboratory, and risk-assessment methods that could produce internationally comparable results, and the development of human resources in the field of chemical safe...
Between 1990 and 2008, a close collaboration between the Centre for Environment, Fisheries and Aquaculture Science (Cefas) and the UK Cetacean Strandings Investigation Programme (CSIP) has generated one of the largest time-series datasets on chemical contaminants in a marine mammal species the UK-stranded harbour porpoise (Phocoena phocoena). This dataset shows that some organochlorine pesticid...
n the forthcoming months many scientific , technical, and political energies will be devoted throughout the world to design specific plans to implement the Stockholm Treaty on Persistent Organic Pollutants (POPs). 1–4 Drawn under the leadership of the United Nations Environment Programme (UNEP)—with significant contributions from non-governmental organisations, trade unions, and private compani...
Tissues from Cook Inlet beluga whales, Delphinapterus leucas, that were collected as part of the Alaska Marine Mammal Tissue Archival Project were ana lyzed for polychlorinated biphenyls (PCB’s), chlorinated pesticides, and heavy metals and other elements. Concentrations of total PCB’s (∑PCB’s), total DDT (∑DDT), chlor dane compounds, hexachlorobenzene (HCB), dieldrin, mirex, toxaphene, and h...
There are thousands of adjuvants on the market, yet little is known about their effects on the activity of insecticides on plant surfaces. The effects of 11 selected adjuvants on the rainfastness and retention of bifenthrin ([laJa-(2)-(i-)-(2 methyl[l,l'-biphenyl]-3-yl) methyl 3-(2-chloro-3J,3-trifluoro-l-propenyl)-2~-dimethylcyclopropanearhoxylate) on cotton (Gossypium hirsutum L.) leaves were...
In the USSR the study of pesticide toxicity and toxicodynamics began in 1932. All the compounds used are assessed; hygienic standards of acceptable concentrations in foods, working area air, atmospheric air, and water are calculated. The maximum acceptable daily intake of chemicals from all the media is tabulated and these data are examined for hygienic standardization. In the past toxicologist...
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