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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : VOLOVA T.G., KALACHEVA G.S., KASAEVA G.E., TERESHKOVA G.M.
Заглавие : EFFECT OF GAS-NUTRITION CONDITIONS ON THE GROWTH AND METABOLISM OF SELIBERIA-CARBOXYDOHYDROGENA
Место публикации : Microbiology: MAIK NAUKA/INTERPERIODICA, 1986. - Vol. 55, Is. 6. - С. 748-752. - 5. - ISSN 0026-2617
Примечания : Cited References: 11
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : VOLOVA T.G., GUSEINOV O.A., KALACHEVA G.S., KONDRATEVA E.N., MEDVEDEVA S.E., PUZYR A.P., FEDOROVA Y.V.
Заглавие : METABOLISM OF CARBOXYDOBACTERIA AND THEIR ULTRA-FINE ORGANIZATION ON CULTURING ON MEDIA CONTAINING CARBON-MONOXIDE
Место публикации : Microbiology: MAIK NAUKA/INTERPERIODICA, 1988. - Vol. 57, Is. 5. - С. 633-637. - 5. - ISSN 0026-2617
Примечания : Cited References: 17
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gitelson I.I., Terskov I.A., Kovrov B.G., Lisovskii G.M., Okladnikov Yu.N., Sid'ko F.Ya., Trubachev I.N., Shilenko M.P., Alekseev S.S., Pan'kova I.M., Tirranen L.S.
Заглавие : Long-term experiments on man's stay in biological life-support system
Место публикации : Advances in Space Research. - 1989. - Vol. 9, Is. 8. - С. 65-71. - ISSN 02731177 (ISSN)
Ключевые слова (''Своб.индексиров.''): agricultural products--ecosystems--food products--personnel - health--space flight - manned flight--bios-3 complex--phytotrons--spacecraft--water--air conditioning--article--biomass--crop--evaluation--growth, development and aging--human--instrumentation--light--metabolism--methodology--microclimate--photosynthesis--plant--waste management--wheat--air conditioning--biomass--crops, agricultural--ecological systems, closed--evaluation studies--humans--life support systems--light--photosynthesis--plants--triticum--waste management--water
Аннотация: We describe the experimental system having maximal possible closure of material recycling in an ecosystem, including people and plants, which was carried out in a hermetically sealed experimental complex "BIOS-3", 315 m2 in volume. The system included 2 experimentators and 3 phytotrons with plants (total sowing area of 63 m2). Plants were grown with round-the-clock lamp irradiation with 130 Wm-2 PAR intensity. The plants production was food for people. Water exchange of ecosystem, as well as gas exchange, was fully closed excluding liquids and gas samples taken for chemical analysis outside the system. The total closure of material turnover constituted 91%. Health state of the crew was estimated before, during and after the experiment. A 5-months period did not affect their health. The experiments carried out prove that the closed ecosystem of "man-plants" is a prototype of a life-support system for long-term space expeditions. В© 1989.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T., Gitelson J., Terskov I., Sidko F.
Заглавие : Hydrogen bacteria as a potential regenerative LSS component and producer of ecologically clean degradable plastic.
Место публикации : Life support & biosphere science : international journal of earth space. - 1999. - Vol. 6, Is. 3. - С. 209-213. - ISSN 10699422 (ISSN)
Ключевые слова (''Своб.индексиров.''): carbon dioxide--hydroxybutyric acid--polymer--air conditioning--article--biomass--catering service--chemistry--metabolism--methodology--microclimate--urine--waste management--water management--wautersia eutropha--air conditioning--biomass--carbon dioxide--cupriavidus necator--ecological systems, closed--food supply--hydroxybutyrates--life support systems--polymers--urine--waste management--water purification
Scopus
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Semenov D.A., Sudachkova N.E., Khlebopros R.G.
Заглавие : A new scheme of lignin biosynthesis and the mechanism of its regulation of functional properties.
Место публикации : Doklady. Biochemistry and biophysics. - 2002. - Vol. 382. - С. 50-52. - ISSN 16076729 (ISSN)
Ключевые слова (''Своб.индексиров.''): lignin--peroxidase--phenol derivative--polymer--article--biosynthesis--cell wall--chemistry--metabolism--oxidation reduction reaction--physiology--plant--cell wall--lignin--oxidation-reduction--peroxidase--phenols--plants--polymers
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Soukhovolsky V.G., Fomina I.R., Bil K., Nishio J.N., Khlebopros R.G.
Заглавие : An optimization model of the photosynthetic leaf: the model of optimal photosynthetic CO2 fixation within leaves of mesophytic C3 plants.
Место публикации : Doklady Biological Sciences. - 2002. - Vol. 382. - С. 28-30. - ISSN 00124966 (ISSN)
Ключевые слова (''Своб.индексиров.''): carbon dioxide--ribulosebisphosphate carboxylase--article--biological model--ecosystem--light--metabolism--photosynthesis--plant leaf--radiation exposure--carbon dioxide--ecosystem--light--models, biological--photosynthesis--plant leaves--ribulose-bisphosphate carboxylase
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : PLOTNIKOV V.F., GUSEINOV O.A., VOLOVA T.G., FEDOROVA Y.V., MOGILNAYA O.A.
Заглавие : EFFECT OF CARBON-MONOXIDE ON METABOLISM OF THE HYDROGEN BACTERIA ALCALIGENES-EUTROPHUS Z-1
Место публикации : Microbiology: MAIK NAUKA/INTERPERIODICA, 1990. - Vol. 59, Is. 2. - С. 142-148. - 7. - ISSN 0026-2617
Примечания : Cited References: 17
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Kalacheva G.S., Trusova M.Y., Tyul'kova N.A., Puzyr' A.P.
Заглавие : Intracellular degradation of poly-beta-hydroxybutyrate in the hydrogen-oxidizing bacterium Alcaligenes eutrophus
Место публикации : Microbiology: MAIK NAUKA/INTERPERIODICA, 1999. - Vol. 68, Is. 1. - С. 52-57. - 6. - ISSN 0026-2617
Примечания : Cited References: 16
Предметные рубрики: METABOLISM
Ключевые слова (''Своб.индексиров.''): hydrogen-oxidizing bacteria--poly-beta-hydroxybutyrate--degradation--cell size
Аннотация: The intracellular degradation of poly-beta-hydroxybutyrate (PHB) in Alcaligenes eutrophus culture was found to occur at different: rates, depending on growth conditions, The degradation of PHB probably allows protein. synthesis and cell growth under nonoptimal environmental conditions. The isolated native granules of poly-beta-hydroxybutyrate were stable, unless they were isolated from biomass subjected to freezing-thawing treatment. Degradation of isolated granules could also be stimulated by increasing the ionic strength of the medium or-adding cell-free extracts, It is anticipated that bacterial cells contain soluble factors that either stimulate or inhibit the degradation of PHB granules.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gitelson I.I., Terskov I.A., Kovrov B.G., Sidko F.Ya., Lisovsky G.M., Okladnikov Yu.N., Belyanin V.N., Trubachov I.N., Rerberg M.S.
Заглавие : Life support system with autonomous control employing plant photosynthesis
Место публикации : Acta Astronautica. - 1976. - Vol. 3, Is. 9-10. - С. 633-650. - ISSN 00945765 (ISSN)
Ключевые слова (''Своб.индексиров.''): biochemical engineering - photosynthesis--spacecraft--adaptation--article--chlorella--growth, development and aging--human--instrumentation--intestine--male--metabolism--microbiology--microclimate--photosynthesis--physiology--plant--space flight--task performance--vegetable--water supply--wheat--adaptation, physiological--chlorella--ecological systems, closed--environment, controlled--humans--intestines--life support systems--male--metabolism--photosynthesis--plants--space simulation--task performance and analysis--triticum--vegetables--water supply
Аннотация: This research was aimed at obtaining a closed control system. This was achieved by placing all the technological processes providing for human vital activities within the hermetically sealed space, and by transferring the entire control and guidance of these processes to people inhabiting the system. In contrast to existing biological life support systems, man has been included not only as a participant of metabolism, but as an operator who is the central figure in collecting information, making decisions and controlling all technological processes. To tackle this problem, the "BIOS-3" experimental complex was created for performing long-term experiments using different structures of biological life-support system. The experiment lasted six months and consisted of three stages. During the first stage the system was comprised of two equivalent phytotrons with the culture of wheat and an assortment of vegetable plants, and the living compartment. At the second stage, one of the phytotrons was removed while a compartment of chlorella cultivators was introduced. The third stage differed from the second, the former using wheat phytotron and the latter employing phytotron with an assortment of vegetable cultures. Three men inhabited the system simultaneously. The experiment demonstrated that a biological life support system controlled autonomously from the inside is feasible within a small confined space. However, immunological and microbiological research shows, that the medium created by the system is not fully adequate for man. In conclusion, some prospects have been outlined for further studies of biological life support systems. В© 1976.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I., Bogdanova O.N.
Заглавие : An experimental study and a mathematical model of interactions in a mixed culture of invertebrates and algae in the Producer-Consumer aquatic biotic cycle
Колич.характеристики :6 с
Место публикации : Biofizika: MEZHDUNARODNAYA KNIGA, 2004. - Vol. 49, Is. 6. - С. 1112-1117. - ISSN 0006-3029
Примечания : Cited References: 22
Предметные рубрики: PREY
Ключевые слова (''Своб.индексиров.''): mixed culture--invertebrates--algae--metabolic products
Аннотация: An experimental investigation was carried out, and a mathematical model of interaction between invertebrates (infusoria Paramecium caudatum and rotifera Brachionus plicatilis) and algae (Chlorella vulgaris and S enedesmus quadricauda) in the producer-consumer aquatic biotic cycle with spatially divided links was constructed. The model describes the dynamics of a mixed culture of infusoria and rotifera in the consumer link, when they consume a mixed culture of algae coming from the producer link. A negative influence of products of algae Scenedesmus metabolism upon the reproduction of infusoria P. caudatum was revealed. Taking this into account, a qualitative coincidence of the results of mathematical modeling with experimental data was obtained. It was shown that the co-existence of mixed algae culture in the producer link with invertebrates in the consumer link in the producer-consumer aquatic biotic cycle is impossible because of the displacement of infusoria P. caudatum by rotifera Brachionus plicatilis.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bondar V.S., Boersma M.G., Golovlev E.L., Vervoort J..., Van Berkel WJH, Finkelstein Z.I., Solyanikova I.P., Golovleva L.A., Rietjens IMCM
Заглавие : (19)F NMR study on the biodegradation of fluorophenols by various Rhodococcus species
Колич.характеристики :12 с
Место публикации : Biodegradation: SPRINGER, 1998. - Vol. 9: NMR in Environmental Sciences Symposium (OCT 24, 1997, EDE, NETHERLANDS), Is. 6. - С. 475-486. - ISSN 0923-9820, DOI 10.1023/A:1008391906885
Примечания : Cited References: 37
Предметные рубрики: NUCLEAR-MAGNETIC-RESONANCE
PSEUDOMONAS-PUTIDA MT-2
PHENOL HYDROXYLASE
BACTERIAL-DEGRADATION
3-OXOADIPATE PATHWAY
FLUOROBENZOIC ACID
CONVERSION
METABOLISM
CYCLOISOMERASES
2-CHLORO-CIS,CIS-MUCONATE
Ключевые слова (''Своб.индексиров.''): biodegradation--fluorophenols--(19)f nmr--oxidative defluorination--rhodococcus species
Аннотация: Of all NMR observable isotopes (19)F is the one perhaps most convenient for studies on biodegradation of environmental pollutants. The reasons underlying this potential of (19)F NMR are discussed and illustrated on the basis of a study on the biodegradation of fluorophenols by four Rhodococcus strains. The results indicate marked differences between the biodegradation pathways of fluorophenols among the various Rhodococcus species. This holds not only for the level and nature of the fluorinated biodegradation pathway intermediates that accumulate, but also for the regioselectivity of the initial hydroxylation step. Several of the Rhodococcus species contain a phenol hydroxylase that catalyses the oxidative defluorination of ortho-fluorinated di- and trifluorophenols. Furthermore, it is illustrated how the (19)F NMR technique can be used as a tool in the process of identification of an accumulated unknown metabolite, in this case most likely 5-fluoromaleylacetate. Altogether, the (19)F NMR technique proved valid to obtain detailed information on the microbial biodegradation pathways of fluorinated organics, but also to provide information on the specificity of enzymes generally considered unstable and, for this reason, not much studied so far.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rodionova N.S., Bondar V.S., Petushkov V.N.
Заглавие : Ca(2+)-activator of the luminescence system of the earthworms Henlea sp., (Annelida: Clitellata: Oligochaeta: Enchytraeidae)
Место публикации : Doklady. Biochemistry and biophysics. - 2002. - Vol. 386. - С. 260-263. - ISSN 16076729 (ISSN)
Ключевые слова (''Своб.индексиров.''): calcium--divalent cation--edetic acid--luciferase--luciferin--metal--animal--annelid worm--article--chemistry--dose response--enzymology--genetics--kinetics--luminescence--metabolism--animals--calcium--cations, divalent--dose-response relationship, drug--edetic acid--firefly luciferin--kinetics--luciferases--luminescent measurements--metals--oligochaeta
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petushkov V.N., Rodionova N.S., Bondar' V.S.
Заглавие : Study of the luminescence system of the soil enchytraeid Fridericia heliota (Annelida: Clitellata: Oligochaeta: Enchytraeidae)
Место публикации : Doklady Biochemistry and Biophysics. - 2003. - Vol. 391, Is. 1-6. - С. 204-207. - ISSN 16076729 (ISSN) , DOI 10.1023/A:1025105323648
Ключевые слова (''Своб.индексиров.''): adsorption chromatography--animal cell--annelid worm--article--luminescence--nonhuman--purification--animal--drug antagonism--isolation and purification--metabolism--physiology--soil--animalia--annelida--clitellata--enchytraeidae--edetic acid--luciferase--magnesium--animals--edetic acid--luciferases--luminescent measurements--magnesium--oligochaeta--soil
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Barashkov V.A., Gitelzon I.I., Nefedov V.P., Trubachev I.N.
Заглавие : The dynamics of the amino acid composition of the medium in cultivating the isolated organs by controlled perfusion (Russian)
Место публикации : Byulleten Eksperimentalnoi Biologii i Meditsiny. - 1975. - Vol. 80, Is. 7. - С. 36-38. - ISSN 03659615 (ISSN)
Ключевые слова (''Своб.индексиров.''): amino acid--amino acid--dog--in vitro study--kidney--liver--sternum--theoretical study--animal--article--culture medium--metabolism--organ culture--organ preservation--perfusion--tissue preservation--kidney--liver--kidney perfusion--liver perfusion--tissue culture--amino acids--animal--culture media--dogs--english abstract--in vitro--organ culture--organ preservation--perfusion--tissue preservation--kidney--liver
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gitelzon I.I., Nefedov V.P., Mezhevikin V.V.
Заглавие : Effect of hypoxemia on erythropoietic activity of perfused organs
Место публикации : Byulleten Eksperimentalnoi Biologii i Meditsiny. - 1977. - Vol. 84, Is. 7. - С. 23-24. - ISSN 03659615 (ISSN)
Ключевые слова (''Своб.индексиров.''): animal--bone marrow--cell proliferation--erythropoiesis--histology--hypoxemia--injury--mammal--perfusion fluid--theoretical study--article--dog--kidney--liver--metabolism--perfusion--spleen--sternum--erythropoietin--animal--anoxemia--dogs--english abstract--erythropoietin--kidney--liver--perfusion--spleen--sternum
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bondar V.S., Boersma M.G., van Berkel WJH, Finkelstein Z.I., Golovlev E.L., Baskunov B.P., Vervoort J..., Golovleva L.A., Rietjens IMCM
Заглавие : Preferential oxidative dehalogenation upon conversion of 2-halophenols by Rhodococcus opacus 1G
Колич.характеристики :10 с
Место публикации : FEMS Microbiol. Lett.: ELSEVIER SCIENCE BV, 1999. - Vol. 181, Is. 1. - С. 73-82. - ISSN 0378-1097, DOI 10.1111/j.1574-6968.1999.tb08828.x
Примечания : Cited References: 30
Предметные рубрики: PHENOL HYDROXYLASE
POLYCHLORINATED PHENOLS
MICROBIAL-DEGRADATION
TRICHOSPORON-CUTANEUM
METABOLISM
PURIFICATION
REGIOSELECTIVITY
CHLOROAROMATICS
COMPONENT
BENZOATE
Ключевые слова (''Своб.индексиров.''): phenol hydroxylase--oxidative dehalogenation--2-halophenol--f-19 nmr--rhodococcus opacus
Аннотация: The regiospecificity of hydroxylation of C2-halogenated phenols by Rhodococcus opacus 1G was investigated. Oxidative defluorination at the C2 position ortho with respect to the hydroxyl moiety was preferred over hydroxylation at the non fluorinated C6 position for all 2-fluorophenol compounds studied. Initial hydroxylation of 2,3,5-trichlorophenol resulted in the exclusive formation of 3,5-dichlorocatechol. These results indicate that, in contrast to all other phenol ortho-hydroxylases studied so far, phenol hydroxylase from R. opacus 1G is capable of catalyzing preferential oxidative defluorination but also oxidative dechlorination. (C) 1999 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kirensky L.V., Gitelson I.I., Terskov I.A., Kovrov B.G., Lisovsky G.M., Okladnikov Y.N.
Заглавие : Theoretical and experimental decisions in the creation of an artificial ecosystem for human life support in space.
Место публикации : Life sciences and space research. - 1971. - Vol. 9. - С. 75-80. - ISSN 00759422 (ISSN)
Ключевые слова (''Своб.индексиров.''): article--bacterium--biotechnology--chlorella--energy metabolism--human--instrumentation--man machine interaction--metabolism--microclimate--space flight--weightlessness--bacteria--biotechnology--chlorella--ecological systems, closed--energy metabolism--environment, controlled--humans--life support systems--man-machine systems--space flight--weightlessness
Аннотация: All of man's former space flights were not real ventures into space in the biological sense, as his life was supported with unregenerated earth supplies. The coming stage of space exploration requires man's long existence in the cosmos and on the other planets. This stage of man's activity outside the earth become possible only by creating small man-made ecosystems, permitting the support of his metabolism by the recycling of substances of the terrestrial biosphere. Creation of such systems is a new scientific and technical task. Man-made ecosystems are a new product of man's activity, which have no complete analogy, either in nature, or in technology. Stochastic mechanisms, which stabilize biogeocenosis, cannot be effective in small ecosystems. A technique of parametric control over biosynthesis made it possible to calculate, and put to practice, an ecosystem for man with a cyclic regeneration of the atmosphere, water and, partially, food. The specific bio-technological properties of small man-made ecosystems are being analysed. The possibility of their application for man's excursions into space and for the settlement of other planets is being considered.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I., Pechurkin N.S., Babkin A.V., Somova L.A., Sarangova A.B.
Заглавие : Experimental and mathematical models for small aqueous closed ecosystems with spatially separated components
Место публикации : Advances in Space Research. - 1999. - Vol. 24, Is. 3. - С. 361-366. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(99)00486-X
Ключевые слова (''Своб.индексиров.''): 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.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Somova L.A., Pechurkin N.S., Sarangova A.B., Pisman T.I., Polonsky V.I., Sadovskay G.M.
Заглавие : Small artificial ecosystems: response to variation of environmental factors (CO2 enrichment).
Место публикации : Life support & biosphere science : international journal of earth space. - 1999. - Vol. 6, Is. 3. - С. 215-220. - ISSN 10699422 (ISSN)
Ключевые слова (''Своб.индексиров.''): carbon--carbon dioxide--article--biomass--comparative study--drug effect--ecosystem--growth, development and aging--metabolism--microbiology--microclimate--photosynthesis--plant seed--pseudomonas--wheat--biomass--carbon--carbon dioxide--ecosystem--environment, controlled--photosynthesis--pseudomonas--seeds--soil microbiology--triticum
Аннотация: Response of "wheat plants--rhizospheric microorganisms--artificial soil"--a simple terrestrial ecosystem--to carbon dioxide increased in its atmosphere to 0.06% has been studied. It has been experimentally demonstrated that a simple ecosystem develops and functions different from its individual elements (components), in this case "plants-artificial soil" without microorganisms. With mineral nutrition unlimited and CO2 enrichment the system is capable of binding (involving into turnover) 40% more carbon than the system without microorganisms. With material balance as the basis, this article evaluates the contribution of a system's elements into its development, namely, the contribution of the photosynthesizing component and the contribution of microorganisms.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I., Somova L.A.
Заглавие : Competition of the natural and manmade biotic cycles in the closed aquatic system
Место публикации : Advances in Space Research. - 2003. - Vol. 31, Is. 7. - С. 1757-1761. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(03)00117-0
Ключевые слова (''Своб.индексиров.''): carbon dioxide--glucose--nitrogen compounds--oxygen--biotic cycle--space research--carbon dioxide--nitrogen--aquatic ecosystem--biosphere--competition (ecology)--endosymbiont--animal--article--bacterium--chlorella--comparative study--culture medium--food chain--growth, development and aging--metabolism--microbiology--microclimate--paramecium--photosynthesis--physiology--symbiosis--time--animals--bacteria--carbon dioxide--chlorella--culture media--ecological systems, closed--food chain--nitrogen--paramecium--photosynthesis--symbiosis--time factors--water microbiology
Аннотация: This study addresses competition between the Paramecium bursaria and zoochlorella - endosymbiosis and the infusoria Paramecium caudatum in a closed aquatic system. The system is a natural model of a simple biotic cycle. P. bursaria consumes glucose and oxygen released by its zoochlorella and releases nitrogenous compounds and carbon dioxide necessary for algal photosynthesis. P. caudatum was fed on bacteria. It was shown that the infusoria P. bursaria united in one cycle with Chlorella had a higher competitive ability than P. caudatum. With any initial percentage of the infusoria in the mixed culture, the end portion of P. bursaria reached 90 - 99%, which was significantly higher than the end portion of the P. caudatum population. It is assumed that the sustenance expenditures of P. caudatum were greater than those of the endosymbiotic paramecium, i.e. the closing of the components into a biotic cycle leads to a decrease in sustenance expenditures. В© 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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