background: polychlorinated biphenyls (pcbs) are synthetic aromatic compounds containing two benzene rings with one to ten chlorine atoms. there are concerns about the health risks of these compounds in the environment due to their toxicity, persistence, and biological accumulation. pcbs wastes must be treated before being discharged to the environment because they will pollute the water, soil,...

background: screening is a routine procedure for isolation of microorganisms which are able to produce special metabolites. purified thermostable α-amylase from bacterial sources is widely used in different industries. in this study we analyzed samples collected from three different hot springs in iran to detect any strains capable of producing thermostable α-amylase. materials and methods: hot...

background: in this study, we determine the vector competence of musca domestica with reference to the transmis­sion of susceptible and resistance bacterial strains in hospitals and slaughter house in sanandaj city, west iran. methods: totally 908 houseflies were collected to isolate bacteria from their external body based on standard proce­dures.antibiotic susceptibility testing was performed ...

background and objectives: the objective of this study was to monitor the microorganisms isolated from grapes and its derivative traditional products produced in iran. material and methods: four kinds of grapes cultivated summer of 2010 in vineyard of takestan and also grape derived products from shahrod, hamedan and takestan were used for this study.  the samples were cultured in specific medi...

bioleaching is the extraction of metals from their ores through the use of microorganisms. inthis process, the use of native bacteria leads to achieve more yields of metals. so, in the presentstudy, native sulfur-oxidizing bacterium in potentiality of uranium extraction was isolated fromghachin mine in iran and identified by partial gene sequencing. for this purpose, the watersamples were colle...

purpose : identifying the predisposing factors of the infectious keratitis results in understanding the underlying mechanisms of its expansion and severity that is essential for initiation of optimal empirical antimicrobial therapy. this study identified main predisposing factors of bacterial keratitis in a sample of iranian population. methods : ninety patients with bacterial keratitis were pr...

in this study, the neutral monosaccharide composition of the extracellular polysaccharide (eps), extracted from thermal bacillus, was determined by liquid chromatography-mass spectrometry and high performance liquid chromatography. our analysis indicated that the eps consisted of rhamnose, mannose, galactose, glucose, fructose, arabinose and xylose. in addition to the neutral sugars in the eps,...

conclusions the findings of the current study indicate that at high concentrations of salt, the growth of bacteria reduces so that it stops at a concentration of 50 mg l-1 (5%). thus, the bacterium is halotolerant or halophilic. with an increase in phenol concentration, the growth rate increased. phenol toxicity appears at a concentration of 600 mg l-1. results the phenol concentration of 600 m...

background toluene is a cyclic aromatic hydrocarbon which is widely used as an industrial feedstock and as a solvent. it is one of the major parts of pollution in oil-contaminated environments. objectives the main aim of this study was to isolate and characterize a bacterium with high potential application in toluene bioremediation. materials and methods to isolate a toluene-degrading bacterium...