b ackground: health care-associated infections are an important cause of morbidity and mortality in hospitals. reports have shown that nurses’ uniforms are sources of health care-associated infection transmission. the present study assessed the rate of bacterial contamination of healthcare worker’s white coats in two tertiary hospitals in mashhad, iran. methods: 300 healthcare workers participa...

background: in order to deliver the precise dose to the target in radiotherapy, absorbed dose to water at the reference point should be assessed. when the calibration procedure is performed for a reference dosimeter in the 60co beam of a secondary standard dosimetry laboratory (ssdl), the total uncertainty in absorbed dose to water (dw) is estimated to be approximately 1.5%. this study attempts...

in our previous work, the effect of use of a water soluble cdi/nhs system as nontoxic cross-linking agent on fabrication of gelatin nanoparticles was investigated. in this research, the effect of variation in some synthetic parameters of gelatin nanoparticles cross-linked by cdi/nhs system such as type of gelatin and formulation of cross- linking agent on their size and distribution was examine...

in this study, modified starch was used as a fat replacer in the milk. the fat replacer was manufactured from modified starch such as pre-gelatinized and cross–linked starches. modified starches were manufactured by hydrochloric acid and citric acid treatments from potato and wheat and were added to skim milk at concentrations of 0.15%, 0.30% and 0.45%. viscosity, total solid, fat content, titr...

this study was an attempt to shed light on the use of requestive speech act by iranian nonnative speakers (nnss) of english and canadian native speakers (nss) of english to find out the (possible) similarities and/or differences between the request realizations, and to investigate the influence of the situational variables of power, distance, context familiarity, and l1’s (possible) influence. ...