Results 221 to 230 of about 47,147 (275)

Fluorescence assay for three organophosphorus pesticides in agricultural products based on Magnetic-Assisted fluorescence labeling aptamer probe.

Food Chemistry, 2020
There has been increasing recent concern about the agricultural use of organophosphorus pesticides. A rapid and sensitive fluorescence assay for the detection of three organophosphorus pesticides has therefore been developed using 6-carboxy-fluorescein ...
Mingdi Jiang, Chen Chen, Jingbo He, Hongyan Zhang, Zhixiang Xu   +4 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

ALKYLATION OF DNA BY ORGANOPHOSPHORUS PESTICIDES

Acta Pharmacologica et Toxicologica, 1979
Methods for the detection of in vivo alkylation of nucleic acids are discussed. Alkylation of mammalian DNA at N‐7 of guanine provides the most sensitive and least equivocal evidence of methylation by an exogenous chemical or its metabolite. No 7‐methylguanine was detected in the combined DNA from the lungs, livers, hearts, brains, kidneys, testes and ...
M F, Wooder, A S, Wright
openaire   +2 more sources

MnO2 Nanosheet-Carbon Dots Sensing Platform for Sensitive Detection of Organophosphorus Pesticides

Analytical Chemistry, 2017
Carbon dots (CDs) combined with a nanomaterial-based quencher has created an innovative way for designing promising sensors. Herein, a novel fluorescent-sensing platform was designed for sensitive detection of organophosphorus pesticides (OPs).
Xu Yan, Yang Song, Chengzhou Zhu, Hongxia Li, Dan Du, X. Su, Yuehe Lin   +6 more
semanticscholar   +1 more source

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

Biotransformation of organophosphorus compounds

Toxicology, 2001
This study reviews current understanding of mechanisms of biotransformation of organophosphorus compounds (OPC). The first part of this article covers chemical aspects of biotransformation describing reactions that lead to activation or detoxication of OPC.
openaire   +2 more sources

Neurotoxic effects of organophosphorus pesticides and possible association with neurodegenerative diseases in man: A review.

Toxicology, 2018
In this article the neurotoxic disorders appearing in patients exposed to organophosphorus pesticides and known mechanisms involved are reviewed. Organophosphorus compounds cause four main neurotoxic effects in humans: the cholinergic syndrome, the ...
M. Jokanović
semanticscholar   +1 more source

Organophosphorus Esters and Polyneuropathy

Annals of Internal Medicine, 1986
Excerpt Contaminated watermelons in California, toxic dumps and abandoned towns in the Midwest, and mass death in India: In the 1980s the hazards from human exposure to pesticides and related chemi...
openaire   +2 more sources

Polydopamine-Capped Bimetallic AuPt Hydrogels Enable Robust Biosensor for Organophosphorus Pesticide Detection.

Small, 2019
Noble metal hydrogels/aerogels with macroscopic nanoassemblies characterized by ultralow density, profuse continuous porosity, and extremely large surface area have gained abundant interest due to not only their tunable physicochemical properties, but ...
Yu Wu, Lei Jiao, Weiqing Xu, Wenling Gu, Chengzhou Zhu, Dan Du, Yuehe Lin   +6 more
semanticscholar   +1 more source

Organophosphorus Insecticide Toxicity

JAMA: The Journal of the American Medical Association, 1965
To the Editor:— In the April 12, 1965 issue ofThe Journal( 192 : 178-179) there appears an answer by Joseph H. Holmes, MD, to a question concerning the prevention of poisoning by organophosphorus insecticides such as parathion and malathion. Some 50 organic compounds of phosphorus have been registered as insecticides by the US Department of ...
openaire   +2 more sources