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Microbiology - The mechanisms of microbial action on synthetic plastics are analyzed, with the focus on the most widespread polymers produced on an industrial scale. The effect of microbial enzymes... 相似文献
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I. A. Borzenkov M. V. Zhurina A. L. Tarasov S. S. Belyaev V. G. Dyubanov 《Applied Biochemistry and Microbiology》2014,50(3):273-278
The possibility of using microorganisms to clean oiled iron scale of metallurgical production was investigated with the goal of recuperation. A stable microbial association growing on mineral oil as the sole carbon source was isolated from a sample from oiled iron scale taken directly from a metallurgical plant. For microbial cultures isolated from this association, the taxonomic position, as well as their morphological and cultural characteristics, were determined. The microorganisms belonged to the genera Luteimonas, Alcanivorax, Flavobacterium, and Pseudomonas. Microbial associations oxidizing mineral oil were found to contain some microorganisms incapable of its utilization, which stimulated the hydrocarbon-oxidizing microflora. Application of the isolates, as well as of the strains from microbial collections, resulted in a 58% decrease in residual oil content in treated samples of the oiled iron scale. 相似文献
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Nikolaev Yu. A. Tikhonova E. N. El’-Registan G. I. Zhurina M. V. Plakunov V. K. Demkina E. V. Zaiko E. V. Bataeva D. S. Nasyrov N. A. Yushina Yu. K. 《Microbiology》2022,91(5):577-592
Microbiology - Localization and structural organization of microbial biofilms developing in anthropogenic ecological niches of meat-processing plants using different raw materials (poultry, pork,... 相似文献
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Christina Westermann Daria S. Zhurina Annika Baur Wei Shang Jing Yuan Christian U. Riedel 《Symbiosis (Philadelphia, Pa.)》2012,58(1-3):191-200
Bifidobacterium bifidum S17 is a promising probiotic candidate, which displays potent anti-inflammatory activity both in vitro and in vivo. Furthermore, tight adhesion to intestinal epithelial cells (IECs) has been shown for this strain and is considered to be an important prerequisite for host colonization and consequently the anti-inflammatory properties. By analyzing the recently sequenced genome at least 9 surface proteins and various gene clusters encoding for putative pili were identified. Most of these proteins are expressed in vitro, with higher expression during exponential growth phase. Increased expression of the putative adhesins in exponential growth phase was associated with higher adhesion of B. bifidum S17 to Caco-2 cells. 相似文献
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Resistance of the oil-oxidizing microorganism <Emphasis Type="Italic">Dietzia</Emphasis> sp. to hyperosmotic shock in reconstituted biofilms 总被引:1,自引:1,他引:0
A number of halotolerant and halophilic bacterial strains were isolated from the Romashkinskoe oil field (Tatarstan) stratal waters having a salinity of up to 100 g/l. The isolation of pure cultures involved biofilm reconstitution on M9 medium with paraffins. The associations obtained were dispersed and reinoculated onto solid media that contained either peptone and yeast extract (PY medium) or paraffins. It was shown that such associations included both oil-oxidizing bacteria and accompanying chemoheterotrophic bacteria incapable of oil oxidation. The pure cultures that were isolated were used for creating binary biofilms. In these biofilms, interactions between halophilic and nonhalophilic bacteria under hypo-and hyperosmotic shocks were investigated. We conducted a detailed study of a biofilm obtained from an oil-oxidizing halotolerant species (with an upper growth limit of 10–12% NaCl) identified as Dietzia sp. and an extremely halophilic gram-negative bacterium (growing within the 5–20% NaCl concentration range) of the genus Chromohalobacter that did not oxidize paraffins. If these microorganisms were grown in a mixed suspension (planktonic) culture that was not supplemented with an additional amount of NaCl, no viable cells of the halophilic microorganism were detected after reinoculation. In contrast, only halophilic cells were detected at a NaCl concentration of 15%. Thus, no mutual protective influence of the microorganisms manifested itself in suspension culture, either under hypoor under hyperosmotic shock. Neither could halophile cells be detected after reinoculating a biofilm obtained on a peptone medium without the addition of NaCl. However, biofilms produced at a NaCl concentration of 15% contained approximately equal numbers of cells of the halophilic and halotolerant organisms. Thus, the halophile in biofilms sustaining a hyperosmotic shock exerts a protective influence on the halotolerant microorganism. Preliminary data suggest that this effect is due to release by the halophile of osmoprotective substances (ectoine and glutamate), which are taken up by the halotolerant species. Such substances are diluted by a large medium volume in suspension cultures, whereas, in biofilms, their diffusion into the medium is apparently hampered by their interaction with the intercellular polymer matrix. 相似文献
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Danilova N. D. Solovyeva T. V. Mart’yanov S. V. Zhurina M. V. Gannesen A. V. 《Microbiology》2020,89(4):493-497
Microbiology - This is the first report on biofilm formation by Micrococcus luteus C01 in model systems stimulated by epinephrine. In the presence of 900 pg/mL of epinephrine in the medium, a 52.3%... 相似文献
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Francesca Bottacini Mary O’Connell Motherway Justin Kuczynski Kerry Joan O’Connell Fausta Serafini Sabrina Duranti Christian Milani Francesca Turroni Gabriele Andrea Lugli Aldert Zomer Daria Zhurina Christian Riedel Marco Ventura Douwe van Sinderen 《BMC genomics》2014,15(1)