the most used quechers and gas chromatography methods were performed, to evaluate the presence of organochlorines, organophosphate, polychlorinated biphenyl and chlorobenzenes in water and in fish. according to the standard iso iec 17025, a recovery rate obtained ranged from 70 to 120% assessing the reliability of analysis results. the exceed rate in fish of malathion is 22.2, and 5.2 ppm in sa...

In the present study, changes in velocity of cytoplasmic streaming in the giant internodal cells of Nitella for varying concentration of the pesticides, 2,4-D, dieldrin, malathion, methyl parathion and endosulfan, were measured. Marked decrease in the velocity of cytoplasmic streaming was found at the concentrations of 0.01, 0.1, 1, 10 and 100mM. Dieldrin was the most toxic to all the pesticide...

P * PChairman, Bihar State Environment Impact Assessment Authority, Govt. of India & Corresponding Author 1. Abstract: Signal transduction by xenobiotics in fish has gained much attention in the recent decade. Organophosphates and carbamates bind specifically to the membrane bound enzyme acetylcholinesterase affecting neural transmission. Since nervous system is one of the important physiologic...

A bacterial strain C5 that can produce new type of marine esterase was isolated and screened from marine sludge. According to 16S rRNA sequence analysis and physiological and biochemical experiments, the strain was identified as Bacillus subtilis. A single isozyme with a molecular weight of 86 kDa was observed by SDS-PAGE and native-PAGE. On this basis, the mechanism of esterase B1 secreted by ...

J. Econ. Entomol. 91 (1): 34-40 (1998) ABSTRACT Effects of 3 conventional insecticides (methyl parathion, azinphos-methyl, cypermethrin) and 3 insect growth regulators (fenoxycarb, diflubenzuron, and tebufenozide) on life-table parameters of Micromus tasmaniae Walker were determined in adults derived from insecticide-treated larvae. The following parameters were compared with the control: sex r...

Over the past few years, concern for green chemistry and sustainable development has risen dramatically. Researchers make an effort to find solutions difficult challenges using chemical processes. In this study, we use oyster shells as a source prepare calcium oxide nanoparticles (CaO-NPs). Transmission electron microscopy (TEM) results showed CaO-NPs morphology, which was spherical in shape, 4...

Rapid methyl parathion detection was measured using a fabricated glassy carbon electrode (GCE) sensor designed the layer-by-layer (LBL) method. Multilayer assemblies were developed on by alternating depositions of anions and cations in which Dawson Type Polyoxometalate ?-K 6 [(P 2 W 18 O 62 ·H O)]·14H (?P POM) polyethyleneimine (PEI) stabilized silver nanoparticles (?PEI-AgNPs) acted as cations...