Results 161 to 170 of about 14,594 (220)

A Comprehensive Review of Multifunctional Nanozymes for Degradation and Detection of Organophosphorus Pesticides in the Environment. [PDF]

Toxics
Liang J, Dong Z, Xu N, Chen T, Liang J, Xia M, Wang F.   +6 more
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Human methyl parathion poisoning

Clinical Toxicology, 2007
Methyl parathion is classed as an extremely hazardous pesticide with a rodent LD50 of 6 to 24 mg/kg. It has been banned in numerous countries, but there are few reports of acute methyl parathion poisoning.Plasma cholinesterase and acetylcholinesterase were measured in blood.
Isbister, Geoffrey K., Mills, Katie, Friberg, Lena E., Hodge, Mary, O'Connor, Enda, Patel, Renu, Abeyewardene, Manel, Eddleston, Michael   +7 more
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A colorimetric assay for determination of methyl parathion using recombinant methyl parathion hydrolase

Biotechnology Journal, 2011
AbstractA simple, rapid and sensitive colorimetric dipstick assay for the detection of the organophosphorous insecticide methyl parathion (MPT) residue in vegetables was developed. The assay was based on the hydrolysis of MPT by a recombinant methyl parathion hydrolase (recMPH), the encoding gene of which was isolated from Burkholderia cepacia, a soil ...
Dau Hung, Anh, Kritsananporn, Cheunrungsikul, Jesdawan, Wichitwechkarn, Werasak, Surareungchai   +3 more
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Methyl Parathion Degrading Enzyme‐based Nano‐hybrid Biosensor for Enhanced Methyl Parathion Recognition

Electroanalysis, 2016
AbstractEnzyme‐based electrochemical biosensors with sufficient sensing specificity are useful analytical tools for detection of biologically important substances in complicated systems. Here, we present the design of a nano‐hybrid biosensor for the specific and sensitive detection of methyl parathion (MP). The nano‐hybrid sensing film was prepared via
Haixia Ye, Zhenzhong Guo, Min Peng, Chunyan Cai, Yong Chen, Yiping Cao, Weiying Zhang   +6 more
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Methyl parathion hydrolase based nanocomposite biosensors for highly sensitive and selective determination of methyl parathion

Biosensors and Bioelectronics, 2011
This article reports the fabrication of a nanocomposite biosensor for the sensitive and specific detection of methyl parathion. The nanocomposite sensing film was prepared via the formation of gold nanoparticles on silica particles, mixing with multiwall carbon nanotubes and subsequent covalent immobilization of methyl parathion hydrolase.
Shizhen, Chen, Jing, Huang, Dan, Du, Jinlin, Li, Haiyang, Tu, Deli, Liu, Aidong, Zhang   +6 more
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Toxicity of parathion, systox, octamethyl pyrophosphoramide, and methyl parathion in man

Toxicology and Applied Pharmacology, 1969
Abstract Experiments in human beings were undertaken to determine the levels of minimal toxicity of parathion, systox, OMPA, and methyl parathion. The study of parathion demonstrated that the level of minimal toxicity is 7.5 mg per day. Between 6.75 and 7.125 mg per day of systox produced minimal toxicity.
J A, Rider, H C, Moeller, E J, Puletti, J I, Swader   +3 more
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Accelerated degradation of methyl parathion, parathion and fenitrothion by suspensions from methyl parathion-and p-nitrophenol-treated soils

Soil Biology and Biochemistry, 1992
Soils (an alluvial and a laterite) contained in pots were treated with methyl parathion, fenitrothion or p-nitrophenol at 15 day intervals under flooded or non-flooded (60% WHC) conditions. Suspensions (non-sterile and sterile) of these treated and untreated soils were tested for their ability to degrade methyl parathion, parathion, fenitrothion and ...
Debjani Misra, Sasmita Bhuyan, T.K. Adhya, N. Sethunathan   +3 more
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METHYL PARATHION: EPA'S CHALLENGE

Chemical & Engineering News Archive, 1997
In the past few months, state and federal officials have begun to take strong action to correct what they call "the worst case of pesticide misuse in U.S. history." So far, in Mississippi and neighboring states, officials have identified about 2,700 houses that have been sprayed with methyl parathion for cockroach control (C&EN, Dec. 16, 1996, page 28).
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Electrochemical degradation of methyl parathion

International Journal of Environmental Engineering, 2013
This paper describes the degradation of commercially available methyl parathion by electro oxidation using Ti/RuO2 as anode, stainless steel as cathode and sodium chloride as a supporting electrolyte. Experiments were carried out at constant flow rate and various current densities such as 10, 12 and15 A/dm2 and various concentrations of sodium chloride.
B. Ramesh Babu, R. Kanimozhi, P. Venkatesan, K. Seeni Meera   +3 more
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Reductive transformation of parathion and methyl parathion by Bacillus sp.

Biotechnology Letters, 2007
Based on the results of phenotypic features, phylogenetic similarity of 16S rRNA gene sequences and BIOLOG test, a soil bacterium was identified as Bacillus sp. DM-1. Using either growing cells or a cell-free extract, it transformed parathion and methyl parathion to amino derivatives by reducing the nitro group.
Chao, Yang, Ming, Dong, Yulan, Yuan, Yao, Huang, Xinmin, Guo, Chuanling, Qiao   +5 more
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