نتایج جستجو برای: organophosphorus pesticides

تعداد نتایج: 21436  

Ali Roozbahani M.R Tagebakhsh Mohsen Morravati Syed w. Husain Vahid kiarostami

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...

2013
Eduardo Morales

Several solvents and analyte protectants were evaluated for their ability to stabilize and maximize the recoveries of a number of organophosphorus pesticide residues during GC/MS analysis. Hexane provided the best analyte stability for a wide range of pesticides, and d-sorbitol offered the most benefit to recovery as an analyte protectant.

Journal: :Biotechnology progress 1999
Rogers Wang Mulchandani Chen

We report a rapid and versatile organophosphorus hydrolase (OPH)-based method for measurement of organophosphates. This assay is based on a substrate-dependent change in pH at the local vicinity of the enzyme. The pH change is monitored using fluorescein isothiocyanate (FITC), which is covalently immobilized to the enzyme. This method employs the use of poly(methyl methacrylate) beads to which ...

2013
Retta Ward

Executive Summary The NMDOH developed conclusions and recommendations about the potential association of pesticide exposure and Parkinson's disease (PD) based on the literature assessed. Two main categories were analyzed: studies without genetic interactions and studies with genetic interactions. Within these two categories, the following categories of pesticides were identified: 1) general, 2)...

Journal: :Roczniki Panstwowego Zakladu Higieny 2014
Justyna Noworyta-Głowacka Martyna Beresińska Robert Bańkowski Bożena Wiadrowska Joanna Siennicka Jan K Ludwicki

BACKGROUND Current studies have indicated many environmental factors, such as pesticides, that cause immune system disorders through inducing changes in humoral and cellular responses thereby increasing the risk of contracting infectious diseases and cancer. The literature suggests that low exposures to certain organophosphorus pesticides stimulate the immune system, whilst high exposures resul...

Journal: :iranian journal of psychiatry and behavioral sciences 0
sussan moudi assistant professor of psychiatry, babol university of medical sciences, babol, iran.psychiatric and behavioral sciences research center,zare hospital, sari iran ebrahim alijanpour ali-asghar manouchehri hasan jafarian

ôrganophosphorus pesticides have been used in some cases for suicidal attempts. such poison can affect plasma cholinesterase activity. the case was a 47-year-old man hospitalized due to suicide attempt with swallowing agricultural poison. the patient, diagnosed with major depressive disorder (mdd), underwent treatment with electroconvulsive therapy (ëçt). ât the first ëçt session, the patient d...

Journal: :Journal of chromatographic science 2002
Jorma Kuivinen Staffan Bengtsson

The purpose of this investigation is to develop a rapid and simple method for the assessment of organophosphorus pesticides in bovine muscle by using solid-phase extraction (SPE). After extraction with ethyl acetate (EtOAc) the homogenate is centrifuged and filtered through sodium sulfate. The fat is precipitated in methanol by cooling and the extract is diluted with water and passed through a ...

2012
AM FADAEI MH DEHGHANI AH MAHVI

The photodegradation of two organophosphorus pesticides, malathian and diazinon, by sulfate radicals and bicarbonate radicals in aqueous solution were studied. The effect of the operational parameters such as pH, salt concentration, water type, H2O2 concentration and initial concentration of pesticides was studied. Gas chromatography mass spectroscopy (GC-MS) was used for analyses of pesticides...

2012
Tina Eleršek Metka Filipič

In this rapidly developing, capitalist world, people are continually exposed to numerous environmental pollutants such as industrial waste, polluted air and pesticides. These invariably comprise complex mixtures of chemicals. The effects of the mixtures and their mode of action in humans are insufficiently well studied. The majority of pollutants are potentially toxic for organisms, some being ...

2015
Yan-hua Shi Lei Ren Yang Jia Yan-chun Yan

Pseudomonas stutzeri strain YC-YH1, isolated from pesticide-polluted soil, efficiently degrades organophosphorus pesticides (OPPs) such as chlorpyrifos, parathion-methyl, triazophos, and parathion. Here, we report the genome sequence (4.83 Mb) of P. stutzeri YC-YH1 to facilitate further investigation of the OPP-degrading mechanism.

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