Results 181 to 190 of about 172,482 (220)

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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Chirality of organophosphorus pesticides: Analysis and toxicity

Journal of Chromatography B, 2010
Although the importance of chirality in organophosphorus compounds (OPs) is well recognized in relation to their biological effects, as with most chiral pesticides, OPs are generally marketed, used and released to the environment as racemates (i.e., equimolar mixtures of enantiomers).
Mae Grace, Nillos, Jay, Gan, Daniel, Schlenk   +2 more
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Adsorption of Phorate, an Organophosphorus Pesticide, on Vertisol

Archives of Environmental Contamination and Toxicology, 2009
Adsorption of phorate, an organophosphorus pesticide, on a vertisol soil was studied. The resulting data were well described by Freundlich and Langmuir adsorption isotherms. Adsorption was fast and the equilibrium was established within 8 h, which is comparatively less than reported previously.
Radha, Rani, Asha, Juwarkar
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Sulfotepp in diazinon and other organophosphorus pesticides

Bulletin of Environmental Contamination and Toxicology, 1987
The presence of the toxic impurity, sulfotepp (O,O,O',O'tetraethyl dithiopyrophosphate), in technical diazinon has been known since the introduction of diazinon in the marketplace as a broad spectrum insecticide (Martgot and Gysin 1957). Because of i ts tox ic i ty , sulfotepp as an impurity has been implicated in cases of human poisoning (Sovocool et ...
R, Turle, B, Levac
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A piezoelectric detector for organophosphorus pesticides in the air

Analytica Chimica Acta, 1974
Abstract A quartz piezoelectric crystal coated with a substrate has been used for the detection of organophosphorus pesticides via selective sorption. The crystal is incorporated in a mixer circuit to allow read-out by either an ammeter or a recorder, and is sufficiently sensitive to allow detection of organophosphorus pesticides at levels of less ...
W M, Shackelford, G G, Guilbault
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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
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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
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Contact dermatitis from organophosphorus pesticides

Contact Dermatitis, 2001
Keywords: allergic contact dermatitis; organophosphorus pesticides; chlorpyriphos-methyl; fenthion; methidathion; parathion-methyl; malathion; cross-sensitivity; occupational ...
BONAMONTE, Domenico, FOTI, Caterina, Cassano N, Rigano G, Angelini G.   +4 more
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Toxicity of organophosphorus pesticides to Dugesia dorotocephala

Bulletin of Environmental Contamination and Toxicology, 1993
David Villar, 1'2 Mei-Hui Li, 1 and David J. Schaeffer ~ 1University of Illinois, Department of Veterinary Biosciences, 2001 South Lincoln Avenue, Urbana, Illinois 61801 USA and 2Departamento de Pharmacologia y Toxicologia, Universidad de Cordoba, Avda, Madina Azahara, 9, 14071-Cordoba ...
D, Villar, M H, Li, D J, Schaeffer
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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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