background: chemical contaminants present in the work environments include gases, vapors, and solid and liquid suspended particles. the number of factories producing chemicals has increased significantly. each year, new products are introduced into the market. consequently, the number of employees at risk of exposure to these materials is increased. hazardous chemicals are used in the petrochem...

the present study investigates the effect of different exposure densities on third grade iranian junior high school (ijhs) students’ efl development and retention. it also attempts to explore whether there is any differential performance due to type of post-exposure assessment tasks (recognition vs. written production). performances of five groups of learners receiving equal amount of exposure ...

Many chemicals to which animals or plants are exposed undergo metabolism prior to storage in, or excretion by, the organism. In some cases, measurement of the levels of metabolites in tissues or excretion products can be used as an indicator of exposure to such chemicals. Measurement of metabolites as a means of monitoring exposure may be especially valuable when practical difficulties exist in...

BACKGROUND Scientists and regulatory agencies strive to identify chemicals that may cause harmful effects to humans and the environment; however, prioritization is challenging because of the large number of chemicals requiring evaluation and limited data and resources. OBJECTIVES We aimed to prioritize chemicals for exposure and exposure potential and obtain a quantitative perspective on rese...

chemical insecticides have been widely employed for the control of storage grain pests. this has caused such problems as insecticide resistance along with contamination of foodstuffs with chemical residues. thus, there is a growing interest in using pathogenic control agents as alternative. in this study, the potential of beauveria bassiana (bbweevil™, a commercial product containing 2×109 coni...