In the present study, we determined levels of chlorinated pesticide residues in surface water samples collected from Charsadda district (KPK, Pakistan). SPME-GC-ECD with COMBI PAL CTC autosampler was used for extraction and analysis 20 organochlorine pesticides samples. For maximum efficiency SPME procedure, several parameters were studied, including desorption time fiber, solution pH, agitatio...

liver samples from golden jackal (canis aureus) were collected from noor in the central coastline mazandaran province. the samples of this study were killed in road accidents. levels of persistent organochlorine pollutants (pops) including polychlorinated biphenyls (pcbs), ddts and metabolites, hexachlorocyclohexanes (hchs) and metabolites, hexachlorobenzene (hcb), aldrin and dieldrin were meas...

the genetics and mechanism of malathion resistance in the adults of an. stephensi (ban-s), was studied. nine successive generations of malathion selection in the adults resulted in an increase in ltso of about 3-fold. the crossing experiments indicated that the resistance is inherited as partially dominant character with no indication of sex linkage. the results of back-crosses suggested that p...

The aim of this study was to determine the level of organochlorine pesticides in freshwater fish from the Zagreb area, Croatia. The study included 215 freshwater fish samples from three sites: the Sava River, Lake Jarun, and five fishponds from the Zagreb surroundings. Organochlorine pesticides DDT and derivates, HCH, HCB, lindane, aldrin, dieldrin, endrin, heptachlor with epoxide, and methoxyc...

volume is divided into two parts. Part one contains specifications for technical DDT, BHC, met oxyc or^ chlordane, dieldrin, BHC containing 90% or rnore isomer, Pyrethrem extract (cerosol grade), water dispersible powder concentrates containing DDT and BHC and emulsion concentrates containing DDT, BHC and Dieldrin, all being intended for use against vectors of diseases of man. Part two contains...

In 1997, seven sport fish species were sampled from seven popular fishing areas in San Francisco Bay. Mercury exceeded a human health screening value in 44 of 84 (52%) samples. All collected samples of leopard shark and striped bass exceeded the mercury screening value of 0.23 microg/g wet weight. PCBs exceeded the screening value in 51 of 72 (71%) samples. DDT, chlordane, and dieldrin, had low...

The ionotropic ?-aminobutyric acid (iGABA) receptor is commonly considered as a fast inhibitory channel and an important insecticide target. Since 1990, RDL, LCCH3, GRD have been successively isolated found to be potential subunits of the insect iGABA receptor. More recently, one orphan gene named 8916 was another subunit according its amino sequence. However, little information about has repor...