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Yagafarova, G. G.; Сафаров, А. Х.; Ilina, Elena; Yagafarov, I R; Барахнина, В. Б.; Sukharevich, M. E.

doi:10.1023/a:1019916401749

Applied Biochemistry and Microbiology

2002

DOI: 10.1023/a:1019916401749

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G. G. Yagafarova¹,

А. Х. Сафаров²,

Elena Ilina³

et al.

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“…Numerous studies have been dedicated to the use of oiloxidizing microorganisms in biological purification of industrial sewage [1][2][3][4][5]. Analysis of the literature indicates that the preferable methods of biological purification of oil-polluted water involve either microbial associations (cenoses) or individual microbial cultures adapted to chemical pollutants of certain compositions.…”

mentioning

confidence: 99%

Use of claydite-immobilized oil-oxidizing microbial cells for purification of water from oil

Пирог

Shevchuk

Волошина

et al. 2005

Appl Biochem Microbiol

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Oil-oxidizing bacteria were isolated from oil-polluted soil and water samples and identified as Acinetobacter calcoaceticus K-4, Nocardia vaceinii K-8, Rhodococcus erythropolis EK-1, and Mycobacterium sp. K-2. It was found that immobilization of the bacteria on an expanded clay aggregate accelerated their growth and consumption of hydrocarbon substrates. It was also found that water polluted with 100 mg/l oil could be purified with Rhodococcus erythropolis EK-1 and Nocardia vaceinii K-8 cells immobilized in this way. The dependence of the degree of water purification on its flow rate, aeration, and availability of nitrogen and phosphorus sources was determined. The efficiency of water purification from oil by immobilized Rhodococcus erythropolis EK-1 cells at high flow rates (of up to 0.68 l/h), low aeration (of 0.1 l/l per min) and an intermittent supply of 0.01% diammonium phosphate reached 99.5-99.8%.

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mentioning

confidence: 99%

Use of claydite-immobilized oil-oxidizing microbial cells for purification of water from oil

Пирог

Shevchuk

Волошина

et al. 2005

Appl Biochem Microbiol

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Starvation/stationary-phase survival of Rhodococcus erythropolis SQ1: a physiological and genetic analysis

Fanget

Foley

2010

Arch Microbiol

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The adaptation of Rhodocccus erythropolis SQ1 to energy and carbon starvation was investigated in terms of both the capacity to survive starvation and the contribution of a nutrient-induced stationary phase to cross-protection to other types of environmental stress. It was found that R. erythropolis SQ1 survives for at least 43 days in LB and distilled water, and 65 days in chemically defined medium (CDM) containing high (1%) or low (0.1%) glucose. Furthermore, early stationary-phase R. erythropolis SQ1 grown in CDM 0.1% exhibited enhanced resistance to heat and oxidative stress compared with exponential-phase cells. A second objective of this study was to identify genetic elements involved in starvation/stationary-phase survival. A mutant bank of R. erythropolis SQ1 generated by random transposon insertion mutagenesis was screened; four mutants lost culturability when grown in CDM 1%. No drop in culturability was observed when these mutants were grown in CDM 0.1%. The DNA flanking transposon insertion could be recovered from three mutants. Transposon insertions were found in uvrB (UvrB, part of the DNA excision repair mechanism), between a putative guaB gene and another guaB-like gene, and between a gene encoding a putative phosphoglycerate mutase and putative thioredoxin/cytochrome c biogenesis genes. This represents a first study of the starvation/stationary-phase survival response of Rhodococcus, an organism of immense significance in environmental bioremediation and a number of industrial processes.

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Cited by 2 publications

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Use of claydite-immobilized oil-oxidizing microbial cells for purification of water from oil

Use of claydite-immobilized oil-oxidizing microbial cells for purification of water from oil

Starvation/stationary-phase survival of Rhodococcus erythropolis SQ1: a physiological and genetic analysis

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