نتایج جستجو برای: 1022571 the pesticides
تعداد نتایج: 16056393 فیلتر نتایج به سال:
pesticides are widely used in iranian agriculture and this has made a major toxicological concern among health professionals. the objective of this study is to explore national data about pesticides toxicity. all relevant databases such as google scholar, pubmed, and scopus in a time period of 1960 to 2012 were searched for the keywords “pesticides, iran, environment, and population studies”. a...
a gas chromatography mass spectrometry with spike calibration curve method was used to quantify three carbamate pesticides residue in cooked white rice and to estimate the reduction percentage of the cooking process duration. the selected pesticides are three carbamate pesticides including carbaryl and pirimicarb that their mrl is issued by “the institute of standards of iran” and propoxur whic...
background: the objective of this study was to determine the residual concentrations of ethion and imidacloprid in cucumbers grown in greenhouse. the effect of some simple processing procedures on both ethion and imidacloprid residues were also studied. methods: ten active greenhouses that produce cucumber were randomly selected. ethion and imidacloprid as the most widely used pesticides were m...
Abstract Pesticides are agrochemical used to increase agronomic production and higher economic profit. However, these chemical pesticides could be persistent in soil and water, collective in silt or bio-aggregates in biota relying upon their dissolvability, prompting various kinds of natural contamination. These pesticides have also shown detrimental effects such as phytotoxicity, genotox...
Background: Pesticides are widely used around the world, especially in underdeveloped and developing countries. However, the effect of residual amounts of these compounds on the physiological processes of the body has always been discussed. Materials and methods: In this experimental study, 27cucumber plants were sprayed with a concentration equal to twofold recommended dose (acetamiprid (50 g...
A reliable, rapid and accurate method based on spiked calibration curves and direct sample introduction was developed for determination of 17 pesticide residues in rice by gas chromatography-mass spectrometry single quadrupole selected ion monitoring GC/MS-SQ-SIM. Sample preparation is based on extraction with acetonitrile without clean up. The use of spiked calibration curves for constructing...
a 'worst case' laboratory method was employed for evaluating total effect of four pesticides (imidacloprid, dichlorvos, pymetrozine and abamectin) on the nymphs mortality and adults reproduction in orius albidipennis reuter (hemiptera: anthocoridae). the bioassays were carried out in laboratory using drum cell method, under controlled conditions of: 27±1?c, rh of 65±5% and 16-h photo ...
Background: Pesticides are an extremely diverse group of substances with a wide potential for a variety of toxic effects. They are biocidal agents used to control a wide variety of organisms that pose a threat to health or compete for food or other materials. Selective toxicity for the target pest is the principle of pesticide use, but because organisms are similar at the cellular or subcellula...
Background and Objective: pesticides are essential to protect plants from pests and diseases. Extensive and unsafe use of pesticides by farmers pose various risks to human health and the environment. Therefore, the present study evaluates farmers' knowledge, attitudes, and behaviors regarding pesticides use and the health problems associated with their use. Materials and Methods: In this human...
organophosphorous (op) pesticides are used frequently in agriculture, particularly in asian countries over the past decades. poisoning by these agents, either as acute or chronic in these nations, is a serious health problem. op pesticides residue in fruits and vegetables that may not induce early clinical features, could also affect the human health. therefore, medical and health professionals...
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