background: post-exposure prophylaxis plays an important role in prevention of bloodborne diseases after occupational exposures. objective: to evaluate the knowledge, attitude and practice of dentists towards post-exposure prophylaxis. methods: in a cross-sectional study, 140 dentists in shiraz were selected through a systematic randomized sampling. they filled out a self-made questionnaire inc...

the production of experimentally induced drug resistance in the laboratory provides valuable opportunities for investigators to study the nature and genetics of drug resistance mechanisms to a given agent, patterns of cross resistance and the mode of action of drugs. at the beginning the continuous drug exposure was chosen as a standard procedure to produce drug— resistant strains of p. falcipa...

background: formaldehyde is one of the most serious air contaminant that can be found everywhere. some of the source of formaldehyde include product of building materials, decorated materials, cigarette smoke, etc. aldehydes compounds especially formaldehyde are used as disinfectants for sterilization in different industries. in this study we measured formaldehyde workplace exposure with niosh ...

exposure-based cognitive behavioral therapy (“exposure therapy”) is the most effective psychological treatment for anxiety disorders. however, popular exposure-based treatments differ substantially in how exposure is delivered, and emerging research indicates that the effectiveness of exposure is closely tied to its manner of delivery. the author will present research indicating that there are ...

this paper reports on formaldehyde exposure and its health hazards in a melamine manufacturing industry. the mean of workers' exposure was measured according to 3500 njosh and was found to be 1.44±o.2l, and 2. 17±o.24 ppm in morning and evening shifts, respectively. for stationary ones it was 1.37±o.20, and 2.06±o.25ppm, respectively. the results show that formaldehyde concentration at the...

Mental workload assessment is essential for the optimal interaction of human system in manufacturing industry. Manufacturing industry engaged construction, maintenance, and fabrication service. Performance worker will be lower if higher workload. In are two type workers that mainly involved process such as operator welder. This was found several defects finished good which caused company to suf...

Nanoparticles (NPs) are a heterogeneous group of materials that have various applications, and their risk assessment is an essential condition. This study aimed to review the applicable risk assessment methods in occupational and environmental exposures to NPs. A literature search for articles published since 2005 in Web of Knowledge, Scopus, PubMed, Science Direct, and Google Scholar, using ap...