one of the increasingly important organizational considerations involves occupational health and staff safety. hence, it is crucial for the managers to identify the key organizational factors contributing to reduce work-related accidents. this study was conducted on 340 workers, employees, experts, supervisors, directors, and managers. the data evaluation involved a questionnaire while the anal...

clarithromycin (cla), a broad-spectrum macrolide, is a poorly soluble drug with dissolution rate limited absorption. the aim of this investigation was to prepare cla nanoparticles from a ternary ground mixture in the presence of sodium lauryl sulfate (sls) and polyvinyl pyrrolidone (pvp) as co-grinding water-soluble compounds, in order to improve the drug dissolution rate. different weight rati...

background : gb virus c (gbv-c) is a flavivirus that was characterized in 1995. the prevalence of gbv-c rna in hiv-in­fected subjects has not been previously studied in iran and was therefore determined. methods: we have investigated serum samples of 80 patients from imam khomeini hospital, tehran, iran, whose hiv in­fection was confirmed in our laboratory by western-blotting. we used nested-pc...

in comparison to the previous researches, zro2 nanoparticles with higher surface area (85 m2/g) have been synthesized in this research. the as-prepared zro2 nanoparticles by co-precipitation method were characterized with x-ray diffraction (xrd), scanning electron microscopy (sem) and transmission electron microscopy (tem). the surface area of the sample was characterized by bet method. the eff...

recently, the al2o3–tio2–zro2 system has found valuable applications, particularly, as a support for nox storage–reduction (nsr) catalysts. nanocomposite powders were prepared from the co-precipitation method in inorganic precursors. the behaviors of mixed oxide nanoparticles under ultrasonic irradiation, such as dispersion, and crushing were studied. phase transformations, crystallite size, an...