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Articles by M. Kargar
Total Records ( 1 ) for M. Kargar
  N. Mirzaei , F. Kafilzadeh and M. Kargar
  Different mercury contaminated areas of the Kor River were surveyed for detection of mercury resistant bacteria. The samples were collected from four stations throughout the Kor River in four seasons. Amount of total mercury in the samples was determined using cold vapor atomic absorption spectrophotometery. The response of bacterial communities to toxic effects of Hg was monitored by enumerating the number of bacteria on agar containing 10 mg L-1 HgCl2 and with out Hg (II). Isolation of mercury resistant bacteria was performed using the primary enrichment culture method and directly plating on agar containing 10 mg L-1 HgCl2 Hg (II). Total viable counts ranged from 6.5X106 to 2.2X107 cfu g-1 in different stations. Frequencies of mercury resistant bacteria were 42.5% in Pole Khan Station and 3.14% in Droodzan Station. These stations were the most contaminated and uncontaminated areas of the Kor River, respectively. Pseudomonas sp., E. coli, Serratia marcescens, etc. was identified as mercury resistant bacteria. Using the primary enrichment culture method has permitted more effective isolation of Hg resistant bacteria. Present results showed that enhancement of mercury pollution in the environment will increase the probability of the isolation of Hg resistant bacteria.
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