Results 181 to 190 of about 23,035 (210)

Biodegradation of organophosphorus pesticides by surface-expressed organophosphorus hydrolase

Nature Biotechnology, 1997
Organophosphorus hydrolase (OPH) was displayed and anchored onto the surface of Escherichia coli using an Lpp-OmpA fusion system. Production of the fusion proteins in membrane fractions was verified by immunoblotting with OmpA antisera. Inclusion of the organophosphorus hydrolase signal sequence was necessary for achieving enzymatic activity on the ...
R D, Richins, I, Kaneva, A, Mulchandani, W, Chen   +3 more
openaire   +2 more sources

Postmortem blood concentrations of organophosphorus pesticides

Forensic Science International, 2009
Cases involving acute fatalities due to ingestion of organophosphorus pesticides (OPs), such as chlorpyrifos, diazinon, malathion and parathion, are presented. Solid-phase extraction (SPE) and gas chromatography/mass spectrometry (GC/MS) were used for the analysis of OPs in postmortem blood.
Mee-Jung, Park, Sang-Whan, In, Sang-Ki, Lee, Wha-Kyung, Choi, Yoo-Sin, Park, Hee-Sun, Chung   +5 more
openaire   +2 more sources

Polyamide layer chromatography of organophosphorus pesticides

Journal of Chromatography A, 1969
Abstract The separation of nineteen organophosphorus pesticides by one-dimensional and two-dimensional chromatography and their detection on polyamide layers were investigated. A comparison was made between the detection limits on polyamide and silica gel layers, and this showed the advantages of polyamide layer chromatography.
K, Nagasawa, H, Yoshidome
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Polyamide Layer Chromatography of Organophosphorus Pesticides

Journal of Pharmaceutical Sciences, 1968
Thin-layer chromatographic system and spray reagents are described for rapid differentiation of 11 organophosphorus pesticides.
J T, Huang, H C, Hsiu, T B, Shih, U T, Chou, K T, Wang, C T, Cheng   +5 more
openaire   +2 more sources

Mammalian toxicology of organophosphorus pesticides

Journal of Toxicology and Environmental Health, 1994
Organophosphorus compounds have been utilized as pesticides for almost five decades. They continue to be used as insecticides, helminthicides, ascaricides, nematocides, and to a lesser degree as fungicides and herbicides. While they have been and continue to be extremely useful in agricultural pest control throughout the world, their extensive use has ...
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Organophosphorus pesticide poisoning

The Netherlands Journal of Medicine, 2008
Self-poisoning with organophosphate pesticides is a major health problem world-wide. Through the inhibition of acetylcholinesterase, organophosphorus poisoning is characterised by the clinical picture of acute cholinergic crisis. Other manifestations are the intermediate neurotoxic syndrome and delayed polyneuropathy.In the Western world, the ...
Aardema, H., Ligtenberg, J. J. M., Peters-Polman, O. M., Tulleken, J. E., Zijlstra, J. G., Meertens, John H. J. M.   +5 more
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Estrogenicity of Organophosphorus and Pyrethroid Pesticides

Journal of Toxicology and Environmental Health, Part A, 2002
Although organophosphorus and pyrethroid pesticides are considered environmental contaminants, their estrogenic potentials are still ubiquitous and unclear. The present study was undertaken to evaluate the estrogenic activities of nine pesticides (phoxim, malathion, monocrotophos, dimethoate, opunal, fenvalerate, cypermethrin, permethrin, and ...
Haiyan, Chen, Jigao, Xiao, Gang, Hu, Jianwei, Zhou, Hang, Xiao, Xinru, Wang   +5 more
openaire   +2 more sources

Confirmation of Pesticide Residue Identity: Part IX Organophosphorus Pesticides

Environmental Letters, 1975
This paper describes a confirmation procedure for residue levels of dyfonate, dichlorofenthion and cyanox. After extraction and quantitation by flame photometric detector (FPD)-gas liquid chromatography (GLC), the organophosphorus pesticides are hydrolyzed in a 10% methanolic-potassium hydroxide solution.
J A, Coburn, A S, Chau
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Determination of organophosphorus pesticides in water

1969
Increasing use of organic chemicals for agricultural purposes has caused great concern in recent years. Rachel Carson (1962) was one of the first to focus public attention on the possible hazards connected with pesticide use. Because of this concern, much work (Dugan et al.
G, Zweig, J M, Devine
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Cyanobacterial Degradation of Organophosphorus Pesticides

2020
Pesticides are chemicals which are widely used for the protection of crops from the attack of pathogens. Pesticides include fungicides, insecticides, herbicides, and bactericides. Among the different classes of pesticides used, organophosphorus class of pesticides is commonly used for agricultural applications.
Nimisha Vijayan P, Sabu Abdulhameed
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