Given the widespread use of insecticides in the environment, it is important to perform studies evaluating their potential effects on humans. Organophosphate insecticides, such as chlorpyrifos, are being phased out; however, the use of pyrethroids in household pest control is increasing. While chlorpyrifos is relatively well studied, much less is known about the potential neurotoxicity of cyflu...

The linearity of dose–mortality responses was accepted (Chi square analysis P > 0.05) for S-Lab and Jendouba population (slope regression is 3.42 for S-Lab with Heterogeneity factor equal to 1 and 2.15 for Jendouba population with Heterogeneity factor equal to 5.01). RR at LC50 (RR50) showed that the sample was resistant to chlorpyrifos. The RR50 reached very high level with chlorpyrifos (RR50 ...

Highly phosphine-resistant populations of Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae) and Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) have recently been found in Oklahoma grain storage facilities. These Þndings necessitate development of a phosphine resistance management strategy to ensure continued effective use of phosphine. Therefore, we investigated the efÞcacies of tw...

The biomixture is a principal element controlling the degradation efficacy of the biobed. The maturity of the biomixture used in the biobed affects its overall performance of the biobed, but this is not well studied yet. The aim of this research was to evaluate the effect of using a typical composition of Swedish biomixture at different maturity stages on the degradation of chlorpyrifos. Tests ...

The removal of chlorpyrifos pesticide residues from vegetables was achieved by using low level of ozonated water (OZW) for 15 60 min as contact times at 25 and 35oC. Recovered amount of chlorpyrifos was extracted using solid phase extraction (SPE) and then analyzed by gas chromatography-mass spectrometry (GC-MS). The initial levels of residual chlorpyrifos varied with the kind of vegetables, wh...

Chlorpyrifos is the most common organophosphate insecticide registered for use in Vietnam and is widely used in agriculture, particularly rice farming. However, chlorpyrifos exposure to and adverse effects on farmers has not been evaluated. In this study, biological monitoring of chlorpyrifos exposure in a group of rice farmers was conducted after a typical application event using back-pack spr...

investigation on the current response of an.stephensi larvae to four who recommended larvicides, i.e. malathion, temephos, chlorpyrifos and fenitrothion, were carried out in the laboratory in 1999. diagnostic concentrations of pesticides only yielded 100% mortality with malathion. in contrast, levels of susceptibility to temphos, chlorpyrifos (0.025 mg/l) and temephos (0.625 mg/l) killed 72%, 9...

Phosphorothioate pesticides (OP) such as diazinon, chlorpyrifos, and parathion are activated to highly toxic oxon metabolites by the cytochromes P450 (P450s), mainly in the liver. Simultaneously, the P450s catalyze detoxification of OP to nontoxic dearylated metabolites. The oxon is then detoxified to the dearylated metabolite by PON1, an A-esterase present in the liver and blood serum. The aim...

The recombinant strain P. pastoris GS115-lccC was used to produce laccase with high activity. Factors influencing laccase expression, such as pH, methanol concentration, copper concentration, peptone concentration, shaker rotate speed, and medium volume were investigated. Under the optimal conditions, laccase activity reached 12,344 U/L on day 15. The recombinant enzyme was purified by precipit...

BACKGROUND Chlorpyrifos (CPF), insecticide widely used in agriculture, may cause poisonings in the case of humans. As a result, there is a large amount of treatment research underway to focus on the possibility of chlorpyrifos induced poisonings. The aim of this study has been to evaluate the effects of caffeic acid phenethyl ester (CAPE) and intralipid (IL) on hepatotoxicity induced by chlorpy...