background: monitoring of indicator and pathogenic microorganisms is essential for proper composting. the aim of this study was to evaluate the change in population of coliform bacteria and salmonella spp. in composting process of municipal wastes and after its application on soil. methods: the samples were taken from each raw waste pile, initial pile, and active phase pile, cooling phase pile ...

different species of streptomyces are common in most types of soil. some certain species are plant pathogenic especially on potato. this study was conducted to evaluate genetic diversity among some local streptomyces spp. strains isolated from soil and infected tubers in potato farms in northwest of iran. repetitive dna elements (box, eric and rep) as genetic markers were used for diversity stu...

halophilic bacteria grow over a wide range of salt concentrations. in this study we aimed to isolate and screen out the halophilic bacteria and to determine their activity for production of the bioactive compounds. a total of 50 water, sediments and soil samples were collected from maharlu salt lake in southern region of fars-iran and subjected for isolation of the bioactive compound producing ...

the nutrient elements uptake in many of soils, is a problem because of high ph and plenty of calcium ions in them. some of these elements are phosphorus and microelements. it is possible to increase absorption of these nutrient elements by addition of sulfur in soil and biological oxidation. the rate of this reaction is very slow and thiobacillus bacteria are the most important oxidators of sul...

objective: microorganisms are responsible for many problems in industry and medicine because of biofilm formation. therefore, this study was aimed to examine the effect of thymus vulgaris (t. vulgaris) extracts on the planktonic form and biofilm structures of six pathogenic bacteria. materials and methods: antimicrobial activities of the plant extracts against the planktonic form of the bacteri...

objective: tribes in nubia mountains regions of sudan used monechma ciliatum seeds for common cold and other chest allergic conditions as a traditional medicine. the aim of this paper is to validate this traditional practice scientifically. materials and methods: monechma ciliatum seeds were screened for major phytochemical groups using standard methods. different extracts were bioassayed in- v...

background in some hospitals, urinalysis is done routinely for all patients scheduled for cardiac surgery. occasionally pyuria or bacteria is reported in the microscopic urinalysis of these patients that are clinically asymptomatic for urinary tract infections. objectives we were seeking answer to this question: is the presence of a different number of bacteria in preoperative microscopic urina...

71 samples of milk and dairy products were collected from 18 cities throughout iran. 93 strains of lactic acid bacteria (lab) were isolated and assayed against four opportunistic patho gens including e. coli, proteus and klebsiella as gram-negative and s. aureus as a gram-positive organism. all indicators (organisms) were hospital strains. among isolated bacteria, lactobacilli (37 isolates) had...

methyl tertiary butyl ether (mtbe) belongs to the group of gasoline oxygenates and persistent environment contaminants, and shows potential for biodegradation in aerobic and anaerobic conditions, through application of pure microbial cultures. presented research shows that indigenous bacterial isolates 6sy and 24p, selected from oil hydrocarbons-contaminated environments, were capable of utiliz...

methyl tertiary butyl ether (mtbe) belongs to the group of gasoline oxygenates and persistent environment contaminants, and shows potential for biodegradation in aerobic and anaerobic conditions, through application of pure microbial cultures. presented research shows that indigenous bacterial isolates 6sy and 24p, selected from oil hydrocarbons-contaminated environments, were capable of utili...