Results 211 to 220 of about 310,357 (268)

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

Magnetic covalent organic framework as a solid-phase extraction absorbent for sensitive determination of trace organophosphorus pesticides in fatty milk.

Journal of Chromatography A, 2020
A simple and efficient magnetic solid-phase extraction (MSPE) method was established with magnetic covalent organic framework (COF) as adsorbent to enrich organophosphorus pesticides from fatty milk samples, followed by the sensitive determination via LC-
Xiangping Lin, Xinquan Wang, Jiao Wang, Yuwei Yuan, Shanshan Di, Zhiwei Wang, Hao Xu, Huiyu Zhao, Changshan Zhao, W. Ding, Peipei Qi   +10 more
semanticscholar   +1 more source

Graphene oxide-based colorimetric detection of organophosphorus pesticides via a multi-enzyme cascade reaction.

Nanoscale, 2020
Size-tunable graphene oxides (GO) were synthesized as a horseradish peroxidase (HRP) mimic for colorimetric detection of organophosphorus pesticides (OPs) at nanomolar levels via a cascade reaction.
Shengnan Chu, Wei Huang, F. Shen, Tiezhu Li, Siyuan Li, Wanjia Xu, Chengwei Lv, Q. Luo, Junqiu Liu   +8 more
semanticscholar   +1 more source

Facile synthesis of a core-shell structured magnetic covalent organic framework for enrichment of organophosphorus pesticides in fruits.

Analytica Chimica Acta, 2020
A facile strategy was developed for the fabrication of a magnetic covalent organic framework (COF) via grafting of the monomers, 2,5-dihydroxyterephthalaldehyde (Dt) and 1,3,5-tris(4-aminophenyl) benzene (Tb) onto surface-modified Fe3O4 nanoparticles ...
Xiangping Lin, Xinquan Wang, Jiao Wang, Yuwei Yuan, Shanshan Di, Zhiwei Wang, Hao Xu, Huiyu Zhao, Peipei Qi, W. Ding   +9 more
semanticscholar   +1 more source

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 ...
openaire   +2 more sources

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
openaire   +1 more source

Colorimetric Detection of Organophosphorus Pesticides Based on the Broad-Spectrum Aptamer.

Journal of Nanoscience and Nanotechnology, 2020
Organophosphorus pesticides (OPs) are an important class of common pesticides. However, due to the abuse of organophosphorus pesticides, pesticide residue problems have been highlighted.
Dan-Lei Liu, Ying Li, Rui Sun, Jingyue Xu, Yan Chen, Chunlei Sun   +5 more
semanticscholar   +1 more source

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
openaire   +2 more sources

Organophosphorus pesticides can influence the development of obesity and type 2 diabetes with concomitant metabolic changes.

Environmental Research, 2019
Widespread use and the bioaccumulation of pesticides in the environment lead to the contamination of air, water, soil and agricultural resources. A huge body of evidence points to the association between the pesticide exposure and increase in the ...
M. Czajka, M. Matysiak-Kucharek, B. Jodłowska-Jędrych, Krzysztof Sawicki, B. Fal, B. Drop, M. Kruszewski, L. Kapka-Skrzypczak   +7 more
semanticscholar   +1 more source