نتایج جستجو برای: pesticide residues
تعداد نتایج: 97575 فیلتر نتایج به سال:
Detecting and quantifying pesticide residues in fruits and vegetables is a crucial public health function for analytical laboratories throughout the world. Professor Amadeo Fernàndez-Alba, a full professor in Analytical Chemistry at the University of Almeria, Spain, has headed the European Reference Laboratory for Pesticide Residues in Fruits and Vegetables (EURL-FV) since 2006. Professor Fernà...
A residue-free green synergistic antifungal nanotechnology for pesticide thiram by ZnO nanoparticles
Here we reported a residue-free green nanotechnology which synergistically enhance the pesticides efficiency and successively eliminate its residue. We built up a composite antifungal system by a simple pre-treating and assembling procedure for investigating synergy. Investigations showed 0.25 g/L ZnO nanoparticles (NPs) with 0.01 g/L thiram could inhibit the fungal growth in a synergistic mode...
Nanometer-sized titanium dioxide (TiO2) is an environmentally friendly optical semiconductor material. It has wide application value in many fields due to its excellent structural, optical, and chemical properties. The photocatalytic process of nano-TiO2 converts light energy into electrical or chemical energy under mild conditions. In recent years, the study and application of nano-TiO2 in the...
Y.H. Chiu1, M.C. Afeiche2, A.J. Gaskins1,3, P.L. Williams3,4, J.C. Petrozza5, C. Tanrikut6, R. Hauser2,3, and J.E. Chavarro1,3,7,* Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston,MA 02115, USA Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA Department of Epidemiology, Harvard T.H. Chan School of Public Health, Bosto...
There are few data on pesticide exposures of migrant Latino farmworker children, and access to this vulnerable population is often difficult. In this paper we describe a community-based approach to implement culturally appropriate research methods with a migrant Latino farmworker community in Oregon. Assessments were conducted in 96 farmworker homes and 24 grower homes in two agricultural commu...
A multi pesticide residues analysis was carried out for farmgate samples of okra fruits from four markets places of Meerut region. The okra fruits samples were analyzed for monocrotophos, chlorpyriphos, dimethoate. Okra vegetable was analyzed for pesticide residues using multiresidue analysis by GLC. It was observed that 39.0% of the samples were contaminated residues below MRL three pesticides...
In this study, a new clean up method was developed for the routine multiresidue determination of organochlorine pesticide residues in honey. The analytical procedure requires sample extraction with methanol, followed by a clean up step through a C18 Sep-Pak cartridge. Finally, pesticides are eluted with hexane. The determination of organochlorine pesticide residues was performed by capillary ga...
— This paper uses a large database of laboratory test results to investigate the sources of international variation in pesticide residues on food products. We specify and estimate a model that incorporates contamination effects attributable to product pest sensitivity, pesticide toxicity levels and characteristics of the producing country. Among the latter, our model tests for the effects of in...
The conventional analysis of pesticide residues in analytical commodities, such as tobacco and tobacco products is a labor intensive procedure, since it is necessary to cover a wide range of different chemicals, using a single procedure. Standard analysis methods include extensive sample pretreatment (with solvent extraction and partitioning phases) and determination by GC and HPLC to achieve t...
Environmental pollution by pesticide residues is a major environmental concern due to the extensive use of these substances in agriculture. The insecticide beta-cyfluthrin is a synthetic pyrethroid widely used in agricultural and other domestic activities. The aim of the present study was to assess the genotoxic effects of a sublethal exposure of the fish Bryconamericus iheringii (Characidae) t...
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