Results 201 to 210 of about 281,216 (273)

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

Acetylcholine esterase enzyme doped multiwalled carbon nanotubes for the detection of organophosphorus pesticide using cyclic voltammetry.

International Journal of Biological Macromolecules, 2019
Use of immobilized acetylcholine esterase (AChE) for detecting organophosphorus pesticides in water sources and body fluids can bring down the detection costs dramatically.
Jinal B Thakkar, Shweta Gupta, C. Prabha
semanticscholar   +1 more source

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

Nanocomposites of Pt nanoparticles anchored on UiO66-NH2 as carriers to construct acetylcholinesterase biosensors for organophosphorus pesticide detection

Electrochimica Acta, 2019
Pt nanoparticle-anchored zirconium-based metal organic framework nanocomposites (Pt@UiO66-NH2) with large surface areas and highly dispersed Pt nanoparticles were synthesized and applied to prepare acetylcholinesterase (AChE) biosensors for ...
Li Ma, Ying He, Youran Wang, Yuhua Wang, Ruotong Li, Zhihong Huang, Yanjun Jiang, Jing Gao   +7 more
semanticscholar   +1 more source

Amphiphilic Polymer-Mediated Aggregation Induced Emission Nanoparticles for Highly Sensitive Organophosphorus Pesticide Biosensing.

ACS Applied Materials and Interfaces, 2019
Biosensing applications require signal reporters to be sufficiently stable and biosafe, as well as highly efficient. Aggregation induced emission (AIE) nanoparticles have proven to be capable of cell imaging and cancer therapy, however, realizing ...
Jian-Long Chen, Xiaojie Chen, Qiuyi Huang, Wenlang Li, Qiaoxi Yu, Longji Zhu, Tianwen Zhu, Siwei Liu, Zhenguo Chi   +8 more
semanticscholar   +1 more source

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
openaire   +2 more sources

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

A New Strategy for Direct Electrochemical Sensing of a Organophosphorus Pesticide, Triazophos, Using a Coomassie Brilliant-Blue Dye Surface-Confined Carbon-Black-Nanoparticle-Modified Electrode

ACS Applied Nano Materials, 2018
Triazophos, O,O-diethyl O-(1-phenyl-1H-1,2,4-triazol-3-yl)phosphorothioate (TPZ), an organophosphorus pesticide, has been widely used in agriculture to control pests, insects, and some nematodes (roundworms).
K. S. Shalini Devi, N. Anusha, Sudhakaran Raja, Annamalai Senthil Kumar   +3 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