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Kinetic Parameters of a Culture of the Hydrogen-Oxidizing Bacterium Ralstonia eutropha Grown under Conditions Favoring Polyhydroxybutyrate Biosynthesis / T. G. Volova, N. A. Voinov // Applied Biochemistry and Microbiology. - 2003. - Vol. 39, Is. 2. - P166-170, DOI 10.1023/A:1022585912873 . - ISSN 0003-6838
Кл.слова (ненормированные):
hydrogen -- poly(3 hydroxybutyric acid) -- article -- bacterial growth -- bacterium culture -- biosynthesis -- controlled study -- culture medium -- density -- fermentation -- gas -- gravimetry -- heat exchange -- nonhuman -- oxidation -- Ralstonia eutropha -- surface tension -- temperature dependence -- thermogenesis -- Bacteria (microorganisms) -- Ralstonia -- Wautersia eutropha
Аннотация: Kinetic parameters of a culture of the hydrogen-oxidizing bacterium Ralstonia eutropha grown on a gas substrate under conditions favoring autotrophic biosynthesis of polyhydroxybutyrate were studied. The following parameters, making it possible to control and optimize the process in industrial situations, were determined: specific rate of substrate consumption, physical properties of the culture medium, and coefficients of heat emission and mass transfer.

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Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660033, Russian Federation
Siberian State Technol. University, Min. of Educ. of the Russ. Fed., Krasnoyarsk, 660049, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Volova, T.G.; Voinov, N.A.

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Mathematical modeling of population dynamics of unstable plasmid-containing bacteria during continuous cultivation in a chemostat / V. V. Ganusov, A. V. Bril'kov, N. S. Pechurkin // Biofizika. - 2000. - Vol. 45, Is. 5. - С. 908-914 . - ISSN 0006-3029
Кл.слова (ненормированные):
article -- bioreactor -- Escherichia coli -- fermentation -- genetics -- growth, development and aging -- Photobacterium -- plasmid -- theoretical model -- Bioreactors -- Escherichia coli -- Fermentation -- Models, Theoretical -- Photobacterium -- Plasmids
Аннотация: A structural approach to studying the regularities of the population dynamics of unstable recombinant bacterial strains in a chemostat was elaborated. The approach is based on the mathematical modeling of cell distribution in a population with different numbers of plasmid copies. The effect of decreased selective preference of plasmidless variants of the recombinant strain in the chemostat, which is related to a decrease in the number of plasmid copies in cells upon long-term incubation was analyzed. It is shown that the time of half-elimination of plasmids from the bacterial population in the steady state in the chemostat T1/2 does not depend on the maximum number of plasmid copies in cells N but is determined only by the mean time of generation g and the probability of the loss of one plasmid copy tau. The dependence of the preference of bacterial plasmidless variants on the efficiency of expression of genes cloned into plasmids in chemostat was analyzed using the recombinant strain E. coli Z905, whose plasmids pPHL-7 contain cloned genes for the luminescence system of marine luminescing bacteria Photobacterium leiognathi.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Russia. : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Ganusov, V.V.; Bril'kov, A.V.; Pechurkin, N.S.

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Experimental and mathematical models for small aqueous closed ecosystems with spatially separated components / T. I. Pisman [et al.] // Advances in Space Research. - 1999. - Vol. 24, Is. 3. - P361-366, DOI 10.1016/S0273-1177(99)00486-X . - ISSN 0273-1177
Кл.слова (ненормированные):
carbon dioxide -- nitrogen -- oxygen -- quaternary ammonium derivative -- aquatic environment -- artificial ecosystem -- ecological modeling -- trophic interaction -- animal -- article -- biological model -- Candida -- Chlorella -- fermentation -- mathematics -- metabolism -- microclimate -- Paramecium -- photosynthesis -- Animals -- Candida -- Carbon Dioxide -- Chlorella -- Ecological Systems, Closed -- Fermentation -- Mathematics -- Models, Biological -- Nitrogen -- Oxygen -- Paramecium -- Photosynthesis -- Quaternary Ammonium Compounds
Аннотация: Experimental and theoretical models of closed 'autotroph-heteretroph' (chlorella-yeast, chlorella- protozoa) ecosystems with spatially separated components have been created and studied. The chart of flows and interaction of components of gas-closed 'chlorella-yeast' system have formed the basis describe mathematically the functioning of the given system, experimental results have been found to agree with computer solution of the problem in terms of quality. Investigation of the experimental model of the 'producer-consumer' trophic chain demonstrated the role of protozoa in nitrogen turnover. 'Production-decomposition' and 'production-grazing-decomposition' cycle models has been theoretically analyzed and compared. The predator has been shown to be a more intensive mineralizer than the reducer component.

Scopus
Держатели документа:
Institute of Biophysics (Russian Academy of Sciences, Siberian Branch), Krasnoyarsk 6600036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Pisman, T.I.; Pechurkin, N.S.; Babkin, A.V.; Somova, L.A.; Sarangova, A.B.

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The carbon oxide oxidase activity of carboxydobacteria / T. G. Volova, V. F. Plotnikov // Applied Biochemistry and Microbiology. - 1997. - Vol. 33, Is. 2. - P168-171 . - ISSN 0003-6838
Аннотация: The CO oxidase (COX) activity of carboxydobacteria Seliberia carboxydohydrogena cells and the rate of CO oxidation by this culture were studied under various modes of fermentation. The CO oxidase activity of cells was maximal (60-80 U) during limitation of bacterial growth by the source of energy or carbon. The rate of CO oxidation by the culture was 1.4-1.71/g. The adaptive type of dependence of the CO oxidase activity of cells on the concentration of CO in the medium within the range of 0-20% was established.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Volova, T.G.; Plotnikov, V.F.

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The Carbon Oxide Oxidase Activity of Carboxydobacteria / T. G. Volova, V. F. Plotnikov // Prikladnaya Biokhimiya i Mikrobiologiya. - 1997. - Vol. 33, Is. 2. - С. 197 . - ISSN 0555-1099
Аннотация: The CO oxidase activity of carboxydobacteria Seliberia carboxydohydrogenacells and the rate of CO oxidation by this culture were studied under various modes of fermentation. The CO oxidase activity of cells was maximal (60-80 U) during limitation of bacterial growth by the source of energy or carbon. The rate of CO oxidation by the culture was 1.4-1.7 l/g. The adaptive type of dependence of the CO oxidase activity of cells on the concentration of CO in the medium within the range of 0-20% was established.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Volova, T.G.; Plotnikov, V.F.

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Polyhydroxyalkanoate synthesis based on glycerol and implementation of the process under conditions of pilot production / T. Volova [et al.] // Appl. Microbiol. Biotechnol. - 2018, DOI 10.1007/s00253-018-9460-0 . - Article in press. - ISSN 0175-7598
Кл.слова (ненормированные):
Glycerol -- Polyhydroxyalkanoates -- Productivity -- Properties -- Synthesis -- Batch cell culture -- Fermentation -- Organic polymers -- Pilot plants -- Productivity -- Purification -- Synthesis (chemical) -- Degree of crystallinity -- Fed-batch fermentation -- Poly-3-hydroxybutyrate -- Poly-hydroxyalkanoate -- Polyhydroxyalkanoates -- Properties -- Temperature characteristic -- Volumetric productivity -- Glycerol
Аннотация: The present study addresses the synthesis and properties of polyhydroxyalkanoates (PHA) of different composition synthesized by Cupriavidus eutrophus B-10646 using glycerol as a carbon substrate. Poly(3-hydroxybutyrate) [P(3HB)] was effectively synthesized in fed-batch culture in a 30-L fermenter on glycerol of various purification degrees, with 99.5, 99.7, and 82.1% content of the main component. Purified glycerol (99.7%) was used for 150-L pilot scale fermentation. The total biomass and P(3HB) concentration reached 110 and 85.8 g/L, respectively, after 45 h of fed-batch fermentation. An average volumetric productivity of P(3HB) was 1.83 g/(L h). The degree of crystallinity and molecular weight of P(3HB) synthesized on glycerol were lower than and temperature characteristics were the same as those of P(3HB) synthesized on sugars. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.

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Держатели документа:
Siberian Federal University, 79 Svobodnyi Ave, Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Volova, T.; Demidenko, A.; Kiselev, E.; Baranovskiy, S.; Shishatskaya, E.; Zhila, N.

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