نتایج جستجو برای: dimethyl phosphoramidithioate methamidophos

تعداد نتایج: 26419  

Journal: :Journal of agricultural and food chemistry 2003
Elizabeth Tomaszewska Vincent R Hebert

A rugged and sensitive method was developed to monitor urinary concentrations of O,S-dimethyl hydrogen phosphorothioate (O,S-DMPT), a specific biomarker of exposure to the organophosphate insecticide methamidophos. After pH adjustment and C18 solid phase extraction column cleanup, the urine was lyophilized at a low temperature to prevent loss of possibly highly volatile and unstable O,S-DMPT me...

2011
Daniel Jun Lucie Musilova Kamil Musilek Kamil Kuca

We have in vitro tested the ability of common, commercially available, cholinesterase reactivators (pralidoxime, obidoxime, methoxime, trimedoxime and HI-6) to reactivate human acetylcholinesterase (AChE), inhibited by five structurally different organophosphate pesticides and inhibitors (paraoxon, dichlorvos, DFP, leptophos-oxon and methamidophos). We also tested reactivation of human butyrylc...

Journal: :Ecotoxicology and environmental safety 2006
L M García-de la Parra J C Bautista-Covarrubias N Rivera-de la Rosa M Betancourt-Lozano L Guilhermino

The toxicity of methamidophos on the shrimp Litopenaeus vannamei was evaluated using acetylcholinesterase (AChE) activity, behavior, and feeding rate as effect criteria. The biochemical characterization of the soluble cholunesterase (ChE) present in both muscle and eye tissues of L. vannamei was performed in a first phase of the study. In both tissues, almost full inhibition of enzyme activity ...

2009
Mizuki Tsuta Gamal El Masry Takehiro Sugiyama Kaori Fujita Junichi Sugiyama

The performances of support vector machine (SVM) and linear discrimination analysis (LDA) for detecting pesticide on spinach leaf were investigated. Fluorescence images of spinach leaves without any treatment, treated with pure water and methamidophos solution were taken under 561 different wavelength conditions to acquire hyperspectral excitation-emission matrix (EEM) data. Then LDA and SVM we...

2016
Xiaowei He Jiawei Gao Tianyu Dong Minjian Chen Kun Zhou Chunxin Chang Jia Luo Chao Wang Shoulin Wang Daozhen Chen Zuomin Zhou Ying Tian Yankai Xia Xinru Wang

Methamidophos is a representative organophosphate insecticide. The knowledge of its developmental neurotoxicity is limited, especially for zebrafish in the early stages of their life. Four hour post-fertilization (hpf) zebrafish embryos were exposed to several environmentally relevant concentrations of methamidophos (0, 25, and 500 μg/L) for up to 72 hpf. Locomotor behavior was then studied in ...

Journal: :Journal of economic entomology 2008
Thomas Unruh Laura Willett

The insecticides esfenvalerate, endosulfan, imidacloprid, and methamidophos were screened against 74 clonal populations of the green peach aphid, Myzus persicae (Sulzer), collected as fundatrices from peach (Prunus spp.) and as apterous virginoparae from various weeds near potato (Solanum spp.) fields in the Yakima Valley and Columbia Basin regions of Washington state. Response to diagnostic co...

Journal: :Genetics and molecular research : GMR 2005
N Ulku Karabay M Gunnehir Oguz

We examined the cytogenetic and genotoxic effects of the neonicotinoid insecticide imidacloprid and the organophosphate insecticide methamidophos, when administered alone or in combination. These insecticides were tested with the bone marrow chromosome aberration assay and micronucleus test in rats and by the bacterial mutation assay (Salmonella/microsome mutagenicity assay). Wistar albino rats...

2015
Emerson Cristi de Barros Hudson Vaner Ventura Pablo Costa Gontijo Renata Ramos Pereira Marcelo Coutinho Picanço

Arthropods are an important group of macroorganisms that work to maintain ecosystem health. Despite the agricultural benefits of chemical control against arthropod pests, insecticides can cause environmental damage. We examined the effects of one and two applications of the insecticides chlorfenapyr (0.18 liters a.i. ha-1) and methamidophos (0.45 liters a.i. ha-1), both independently and in com...

Journal: :Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment 2011
E D Caldas M V De Souza A N O Jardim

In this study ready-to-eat food samples were collected in the production line of the university restaurant of the University of Brasilia, Brazil, which serves non-vegetarian and vegetarian meals daily. Samples were analysed for the presence of ten organophosphorus insecticides (OPs) by GC/FPD, after extraction with ethyl acetate and anhydrous sodium sulfate (LOQ = 0.002 mg kg(-1)), and for dith...

2011
MUNIR AHMAD

Laboratory bioassays were done to determine the level of resistance to endosulfan, cypermethrin, deltamethrin, methamidophos, profenofos and chlorpyrifos in field populations of cabbage aphid, Brevicoryne brassicae (L). Comparison between Multan and Kabirwala strains revealed that the level of resistance in Multan strain was comparatively higher to methamidophos, profenofos and chlorpyrifos as ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید