crude glycerol (cg) is an abundantly available and cheap by-product from biodiesel production. value-added applications for cg are highly wanted by industry and several processes such as the use of cg for enhanced oil recovery have been proposed. the aim of this study was to evaluate the sulfide production of sulfate-reducing bacteria (srb) indigenous to oil reservoirs using cg as substrate. th...

background & objective: urinary tract infection (uti) is a common disease in adults that early diagnosis and proper treatment of it has high importance. this study was performed for analysis of type and antibiotics resistance of isolated bacteria from urine of adult in different sex and ages for help in choose of antibiotics in empirical therapy.method: data of patients (gender, age, kind o...

in the present study, the effects of milk supplementation on growth and viability of yogurt (streptococcus thermophilus and lactobacillus delbrueckii subsp. bulgaricus) and probiotic bacteria (lactobacillus acidophilus and bifidobacteria) were studied during yogurt production and 33 days of refrigerated storage. the incubation time to reach ph = 4.5 was greatly affected by the addition of milk ...

oak trees cover a wide range of forests in iran and most of them are located in kohgiloye and boyer-ahmad province (k.b). the high tannin is one of the anti-nutritional characteristics of acorn for domestic animal. wide range of gut microorganisms could tolerate tannin and reduce it by producing tannase enzyme. this study was carried out to isolate and identify the tannin resistance bacteria (t...

as pseudomonas, acinetobacter, and staphylococcus that appropriate disinfection can reduce these pathogens. the aim of this study was to evaluate the effect of different disinfectants on gram-negative bacteria isolated from the surface of accidents and burn hospital in yazd. materials and methods: in this study, 240 samples were randomly collected from different parts of accidents and burn hosp...

a bacterial culture was isolated from oil-contaminated soil based on its ability to metabolize the quinoline as the sole source of nitrogen. in this research bacillus licheniformis strain was identified based on the result of 16s rrna analysis. optimized conditions were obtained with full factorial experimental design method using design expert software at temperature: 32oc, agitation speed: 20...

the study applied an isolated brevibacterium sp. (mtcc 10313) for bioremediation of zn, cu, mg and pb in domestic sewage. batch culture experiments were performed on both the fresh and stale sewage samples with glucose supplementation of 1-8g/l. nutrient broth medium was prepared, sterilized and ph adjusted to 6.5-6.8. 1% of the brevibacteria sp. stock was inoculated into the broth and maintain...

aquatic plants have a major influence upon other aquatic organisms, by altering both water chemistry and spatial structure of the habitat in shallow water bodies. some of them, such as stratiotes aloides l., may suppress algal growth. but how aquatic plants would ultimately influence the heterotrophic community and the aquatic ecosystem as a whole is far from clear. our microcosm-based study de...

abstract background: streptococcus mutans in the oral cavities sable to produce mutacin (bacteriocin-like substances) with antibiotic properties. the aim of this study was to investigate the frequency and expression of genes encoding mutacins typei, ii, iii and iv and also two of 8 genes in a cluster encoding the putative bacteriocins, the designated bsm 283, bsm 299, bsm 423, bsm 1889c, bsm 18...

phosphorus solubilizing microorganisms are capable of transforming insoluble phosphorus (p) forms to soluble and bioavailable p. the aim of the present study was to isolate p solubilizing bacteria from forest soils around the rock phosphate (rp) mine of koh-e-sepidlar in kohgiluyeh and boyer ahmad province and evaluate their ability in sperber culture medium and wheat straw medium in the presen...