Esfandiarfard, K. 2017. Novel Organophosphorus Compounds for Materials and Organic Synthesis. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1546. 84 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-513-0045-0. This thesis is devoted to the development of new organophosphorus compounds for potential uses in material science and as rea...

Abstract Organophosphorus pesticides are currently extensively applied on the control of agricultural and forestry pests. The number poisonings deaths caused by organophosphorus increasing year year. Because complex matrix, numerous interfering substances, low poison content, pretreatment methods crucial for detection analysis such cases. As an adsorbent used pretreatment, magnetic nanoparticle...

Research on chlorine-free conversions of P4 into organophosphorus compounds (OPCs) has a long track record, but methods that allow desirable, direct P-C bond formations have only recently emerged. These include the use of metal organyls, carbenes, carboradicals, and photochemical approaches. The versatile product scope enables the preparation of both industrially relevant organophosphorus compo...

Many organophosphorus compounds are irreversible inhibitors of acetylcholinesterase. The methods used in the literature to determine the inhibition kinetic constants usually involve either manual determination of the slope at various points along the inhibition progress curve or fitting polynomials to the curve. The present study investigates the use of non-linear-regression analysis to determi...

Organophosphorus hydrolase (OPH, also known as phosphotriesterase) is a bacterial enzyme that is capable of degrading a wide range of neurotoxic organophosphate nerve agents. Directed evolution has been used to generate one variant (22A11) with up to 25-fold improved hydrolysis of methyl parathion. Surprisingly, this variant also degraded all other substrates (paraoxon, parathion and coumaphos)...

The yolk sac membrane from hen eggs contains esterases that hydrolyze phenyl phenylacetate OpPA) and are sensitive to inhibition, both in vitro and in vivo, by many organophosphorus compounds and by eserine. These esterases are the principal proteins in the membrane which are phosphorylated by 3H-diisopropyl phosphorofluoridate. Inhibition of this mixture of PPA-hydrolyzing esterases in viuo do...

phosalone, malathion and diazinon were analyzed in corn oil using solid phase extraction (spe)with lanthanum silicate as a new solid sorbent followed by gas chromatography with nitrogenphosphorus detection (gc-npd). the efficiency of different eluents (methanol, dichloromethane,ethyl acetate, dichloromethane — ethyl acetate (1:1) and ethyl acetate — methanol (1:1)) werecompared for elution of o...

objective: the purpose of this work was to compare dna damage, acetylcholinesterase (ache) activity, inflammatory markers and clinical symptoms in farmers exposed to organophosphorus pesticides to individuals that had no pesticide exposure. materials and methods: we conducted a cross-sectional survey with a total of 134 people. the subject group consisted of 67 farmers who were exposed to organ...