Quantitative structure-activity relationship (QSAR) software offers a rapid, cost effective means of prioritizing the mutagenic potential of chemicals. MDL QSAR models were developed using atom-type E-state indices and non-parametric discriminant analysis. Models were developed for Salmonella typhimurium gene mutation, combining results from strains TA97, TA98, TA100, TA1535, TA1536, TA1537, an...

conclusions due to the low frequency of stec o157 and the high susceptibility rates of the isolates to the tested antibiotics in this study, stec o157 has not become a major problem in tabriz yet, but comprehensive microbiological surveillance programs that provide early warning and limit the scale of possible outbreaks would be essential. results of the isolates 11 (5.5%) were sorbitol-negativ...

The presence of adenovirus DNA in clinical specimens was analyzed by nucleic acid hybridization assays by both radioactive and enzymatic detection systems. The sensitivity of the hybridization tests was in the range of 10 to 100 pg of homologous adenovirus DNA. Minimal background was noticed with unrelated viral and nonviral DNA. Twenty-four nasopharyngeal mucus aspirate specimens, collected fr...

introduction: papsmear test has been performed by public health services since 1991 in iran.   although cervix cancer is reported 9 th cause of death in four studied counrties in 1999, unfortunately detection rate of smear test is reported very low.  the aim of this study was to determine the cause of low sensitivity of papsmear in hamadan province- north west of iran. materials and methods : 1...

A modification of the Wilkins-Thiel broth-disk procedure for antibiotic susceptibility testing of anaerobic bacteria is described. This method utilizes an aerobically prepared medium overlaid with molten vaspar. Specialized anaerobic techniques or prereduced media are not required.

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