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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shirobokova I.M., Pechurkin N.S.
Заглавие : Mathematical modeling of response of ecosystems with different structure to external impact
Место публикации : Advances in Space Research. - 2001. - Vol. 27, Is. 9. - С. 1593-1598. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(01)00254-X
Ключевые слова (''Своб.индексиров.''): environmental impact--mathematical models--sensitivity analysis--structural analysis--top-down controlled systems--ecosystems--fresh water--ecosystem response--animal--article--biological model--biomass--ecosystem--escherichia coli--food chain--microclimate--protozoon--animals--biomass--ecological systems, closed--ecosystem--escherichia coli--food chain--fresh water--models, biological--protozoa
Аннотация: A mathematical model was used to study the response of ecosystems of different structures to external impact. The response was measured as a sensitivity coefficient: the magnitude of the system's response vs. the change of the factor in the inflow. The formula has been obtained to calculate the sensitivity coefficient for ecosystems containing different numbers of trophic links. The derived sensitivity coefficients demonstrate that the degree of compensation for the external impact can differ depending on the type of system regulation and the length of the trophic chain. E. g. the sensitivity coefficient decreases with complexity of trophic links in an ecosystem for top-down controlled systems and impact of degree of openness on sensitivity e.g. closed ecosystems show higher sensitivity then fully open ecosystem to impacts also bottom-up control system show less sensitivity then top-down. В© 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Brilkov A.V., Ganusov V.V., Morozova E.V., Pechurkin N.S.
Заглавие : Computer modeling of the biotic cycle formation in a closed ecological system
Место публикации : Advances in Space Research. - 2001. - Vol. 27, Is. 9. - С. 1587-1592. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(01)00253-8
Ключевые слова (''Своб.индексиров.''): ecology--energy utilization--mathematical models--biotic turnover--predators--space research--artificial ecosystem--alga--animal--article--biological model--computer simulation--cyprinodontiformes--daphnia--ecosystem--energy metabolism--evolution--food chain--microclimate--plankton--algae--animals--computer simulation--daphnia--ecological systems, closed--ecosystem--energy metabolism--evolution--food chain--models, biological--plankton--poecilia
Аннотация: The process of biotic turnover in a closed ecological system (CES) with an external energy flow was analyzed by mathematical modeling of the biotic cycle formation. The formation of hierarchical structure in model CESs is governed by energy criteria. Energy flow through the ecosystem increases when a predator is introduced into a "producer-reducer" system at steady state. Analysis of the model shows that under certain conditions the presence of the primary predator with its high mineralization ability accelerates the biotic turnover measured by primary production. We, therefore, conclude that for every system it is possible to find a suitable predator able to provide the system with a higher biotic turnover rate and energy consumption. В© 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pechurkin N.S., Brilkov A.V., Ganusov V.V., Kargatova T.V., Maksimova E.E., Popova L.Yu.
Заглавие : Modelling of genetically engineered microorganisms introduction in closed artificial microcosms
Место публикации : Advances in Space Research. - 1999. - Vol. 24, Is. 3. - С. 335-341. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(99)00320-8
Ключевые слова (''Своб.индексиров.''): aquatic environment--artificial ecosystem--ecological modeling--genetically modified organism--alga--animal--article--bacterial count--bacterial gene--biological model--biomass--escherichia coli--feasibility study--genetic engineering--genetics--growth, development and aging--microbiology--microclimate--photobacterium--plasmid--protozoon--time--yeast--algae--animals--biomass--colony count, microbial--ecological systems, closed--escherichia coli--feasibility studies--genes, bacterial--genetic engineering--models, biological--photobacterium--plasmids--protozoa--time factors--water microbiology--yeasts
Аннотация: The possibility of introducing genetically engineered microorganisms (GEM) into simple biotic cycles of laboratory water microcosms was investigated. The survival of the recombinant strain Escherichia coli Z905 (Ap(r), Lux+) in microcosms depends on the type of model ecosystems. During the absence of algae blooming in the model ecosystem, the part of plasmid-containing cells E.coli decreased fast, and the structure of the plasmid was also modified. In conditions of algae blooming (Ankistrodesmus sp.) an almost total maintenance of plasmid-containing cells was observed in E.coli population. A mathematics model of GEM's behavior in water ecosystems with different level of complexity has been formulated. Mechanisms causing the difference in luminescent exhibition of different species are discussed, and attempts are made to forecast the GEM's behavior in water ecosystems.
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Somova L.A., Pechurkin N.S., Pisman T.I.
Заглавие : Increase of atmospheric CO2: Response patterns on a simple terrestrial man-made ecosystem
Место публикации : Advances in Space Research. - 2003. - Vol. 31, Is. 7. - С. 1731-1735. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(03)80019-4
Ключевые слова (''Своб.индексиров.''): carbon dioxide--earth atmosphere--ecosystems--environmental impact--mathematical models--microorganisms--plants (botany)--soils--man-made ecosystems--space research--biosphere--carbon dioxide enrichment--terrestrial ecosystem--carbon dioxide--nitrogen--phosphorus--article--atmosphere--biological model--chemistry--dose response--drug effect--ecosystem--growth, development and aging--metabolism--microbiology--microclimate--plant root--wheat--atmosphere--carbon dioxide--dose-response relationship, drug--ecosystem--environment, controlled--models, biological--nitrogen--phosphorus--plant roots--soil microbiology--triticum
Аннотация: Simple models of terrestrial ecosystems with a limited number of components are an efficient tool to study the main laws of functioning of populations, including microbial ones, and their communities, as components of natural ecosystems, under variable environmental conditions. Among other factors are the increase of carbon dioxide in the atmosphere and limitation of plants' growth by biogenic elements. The main types of ecosystems' responses to changes in environmental conditions (a change in CO2 concentration) have been demonstrated in a "plants - rhizospheric microorganisms - artificial soil" simple experimental system. The mathematical model of interactions between plants and microorganisms under normal and elevated atmospheric CO2 and limitation by nutrients (nitrogen and phosphorus) yielded a qualitative agreement between calculated and experimental values of limiting substances concentrations and release rates of exudates. В© 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pechurkin N.S., Shirobokova I.M.
Заглавие : System analysis of links interactions and development of ecosystems of different types
Место публикации : Advances in Space Research. - 2003. - Vol. 31, Is. 7. - С. 1667-1674. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(03)80013-3
Ключевые слова (''Своб.индексиров.''): free energy--heuristic methods--hierarchical systems--mathematical models--photosynthesis--systems analysis--biological interactions--ecosystems--anthropogenic effect--ecosystem function--systems analysis--article--biological model--biomass--ecology--ecosystem--energy transfer--environmental protection--food chain--methodology--microclimate--plankton--population dynamics--statistics--biomass--conservation of natural resources--ecological systems, closed--ecology--ecosystem--energy transfer--food chain--models, biological--plankton--population dynamics
Аннотация: The anthropogenic impact on the Earth's ecosystems are leading to dramatic changes in ecosystem functioning and even to destruction of them. System analysis and the use of heuristic modeling can be an effective means to determine the main biological interactions and key factors that are of high importance for understanding the development of ecosystems. Cycling of limiting substances, induced by the external free energy flux, and trophic links interaction is the basis of the mathematical modeling studies presented in this paper. Mathematical models describe the dynamics of simplified ecosystems having different characteristics: 1) different degrees of biotic turnover closure (from open to completely closed); 2) different numbers of trophic links (including both "topdown", "bottom-up" regulation types); 3) different intensities of input - output flows of the limiting nutrient and its total amount in the system. Adaptive values of the changes of lower hierarchical levels (populational, trophic chain level) are to be estimated by integrity indices for total system functioning (e.g. NPP, total photosynthesis). The approach developed can be used for evaluating the contributions of lower hierarchical levels to the functioning of the higher hierarchical levels of the system. This approach may have value for determining biomanipulation management and their assessment. В© 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pis'man T.I., Somova L.A., Pechurkin N.S.
Заглавие : Mathematical model of the interaction of components in a plant-rhizospheric microorganisms system at the higher level of carbon dioxide in atmosphere
Место публикации : Biofizika. - 2002. - Vol. 47, Is. 5. - С. 920-925. - ISSN 00063029 (ISSN)
Ключевые слова (''Своб.индексиров.''): carbon dioxide--algorithm--article--biological model--biomass--ecosystem--microbiology--physiology--plant seed--pseudomonas putida--wheat--algorithms--biomass--carbon dioxide--ecosystem--models, biological--pseudomonas putida--seeds--triticum
Аннотация: A mathematical model describing the interaction of plants and rhizospheric microorganisms on complete mineral medium at a higher CO2 level in the atmosphere was constructed. The positive effect of CO2-enrichment on the system plant--rhizospheric microorganisms was shown. The effect of rhizospheric microorganisms on plant growth at normal and high level of carbon dioxide was demonstrated. It was shown that the biomass of plant in the system is smaller than the biomass of plant growing without microorganisms. It was experimentally demonstrated that a simple ecosystem wheat--Pseudomonas putida--artificial soil develops and functions differently than its individual constituents in the case of a wheat-artificial soil system. With unlimited nutrition and a higher CO2 level (0.06%), plants with roots inoculated with microorganisms have a smaller biomass than plants that were not inoculated with microorganisms.
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7.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Slepkov V.A., Sukhovol'skii V.G., Khlebopros R.G.
Заглавие : Modeling the growth and morphogenesis of malignant tumors
Место публикации : Doklady Biochemistry and Biophysics. - 2006. - Vol. 411, Is. 1. - С. 342-345. - ISSN 16076729 (ISSN) , DOI 10.1134/S1607672906060056
Ключевые слова (''Своб.индексиров.''): animal--article--biological model--cancer invasion--cell proliferation--computer simulation--human--morphogenesis--neoplasm--pathology--pathophysiology--animals--cell proliferation--computer simulation--humans--models, biological--morphogenesis--neoplasm invasiveness--neoplasms
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8.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sukhovol'skii V.G., Khlebopros R.G., Iskhakov T.R.
Заглавие : An optimization model of competition between species for resource.
Место публикации : Doklady. Biochemistry and biophysics. - 2003. - Vol. 390. - С. 171-173. - ISSN 16076729 (ISSN)
Ключевые слова (''Своб.индексиров.''): animal--article--biological model--comparative study--competitive behavior--computer simulation--ecosystem--evaluation--growth, development and aging--insect--physiology--plankton--population dynamics--population growth--quality control--species difference--validation study--animals--competitive behavior--computer simulation--ecosystem--insects--models, biological--plankton--population dynamics--population growth--quality control--species specificity
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9.

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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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I., Pechurkin N.S., Mariasova T.S., Somova L.A., Sarangova A.B.
Заглавие : A mathematical model of "plants-microorganisms" interaction on complete mineral medium and under nitrogen limitation
Место публикации : Advances in Space Research. - 1999. - Vol. 24, Is. 3. - С. 383-387. - ISSN 02731177 (ISSN)
Ключевые слова (''Своб.индексиров.''): nitrogen--ecological modeling--interspecific interaction--nutrient limitation--plant--rhizosphere--article--biological model--biomass--comparative study--culture medium--drug effect--growth, development and aging--mathematics--microbiology--plant root--pseudomonas fluorescens--sweating--wheat--biomass--culture media--mathematics--models, biological--nitrogen--plant roots--plant transpiration--pseudomonas fluorescens--triticum
Аннотация: A mathematical model concerning the interaction of plants and rhizospheric microorganisms on complete mineral medium and under nitrogen limitation has been constructed. The model takes into account the closeness of plants and microorganisms in terms of the matter released by the plant and consumed by the microorganisms. The effect of rhizospheric microorganisms on plant growth with normal carbon dioxide and complete mineral medium has been demonstrated. Plants interacting with microorganisms have a greater biomass than plants growing without microorganisms. Wheat growth stimulation by metabolites of rhizospheric microorganisms under laboratory conditions on artificial soil has been experimentally demonstrated (Pechurkin, 1997). Under nitrogen limitation , the biomass of plants, with or without microorganisms, is identical, and is substantially reduced as compared with the medium with standard nitrogen. В© 1999 COSPAR. Published by Elsevier Science Ltd.
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11.

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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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Slepkov V.A., Sukhovol'skiy V.G., Khlebopros R.G.
Заглавие : Population model for malignant tumor and organism interaction
Место публикации : Doklady Biological Sciences. - 2010. - Vol. 430, Is. 1. - С. 17-19. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496610010060
Ключевые слова (''Своб.индексиров.''): article--biological model--cancer invasion--human--neoplasm--pathophysiology--humans--models, biological--neoplasm invasiveness--neoplasms
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shirobokova I.M., Pechurkin N.S.
Заглавие : The effect of cannibalism intensity on net primary production and dynamics of trophic links in aquatic ecosystems
Место публикации : Advances in Space Research. - 2003. - Vol. 31, Is. 7. - С. 1737-1741. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(03)00112-1
Ключевые слова (''Своб.индексиров.''): biomass--ecosystems--mathematical models--photosynthesis--cannibalism intensity--space research--aquatic ecosystem--cannibalism--ecological modeling--net primary production--trophic structure--amphipoda--animal--aquaculture--article--biological model--biomass--cannibalism--daphnia--ecosystem--food chain--microclimate--phytoplankton--zooplankton--amphipoda--animals--aquaculture--biomass--cannibalism--daphnia--ecological systems, closed--ecosystem--food chain--models, biological--phytoplankton--zooplankton
Аннотация: A mathematical model was used to investigate the effect of cannibalism intensity on the net primary production and the dynamics of trophic links in an aquatic ecosystem characterized by cannibalism at the upper trophic level. A mathematical model of an aquatic ecosystem has been constructed, with the following principal trophic links: limiting nutrient concentration, producers (phytoplankton), nonpredatory and predatory zooplankton. The model takes into account the age structure of the predator and includes two age groups (the young and adults). The adult predators are cannibals feeding on both nonpredatory zooplankton and their own young, which consume phytoplankton. It has been found that when cannibalism intensity increases above a certain level, the concentrations of both adults and the young of the predators decrease. At the same time, the concentrations of the nonpredatory zooplankton and of nutrients increase, while the biomass of producers decreases. When the cannibalism intensity is low, the net primary production of the system increases to a certain level correlated with the increase in cannibalism intensity and drops sharply when the level of consumption of young is high. There is an optimal intensity of cannibalism, at which the productivity in the photosynthesis link is maximal. В© 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dubovskaya O.P., Semenchenko V.P., Gladyshev M.I., Buseva J.F., Razlutskij V.I.
Заглавие : Non-predatory mortality indices of cladoceran zooplankton in the pelagial and littoral of a shallow meso-eutrophic lake
Место публикации : Doklady Biological Sciences. - 2007. - Vol. 416, Is. 1-6. - С. 391-393. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496607050201
Ключевые слова (''Своб.индексиров.''): animal--article--biological model--ecology--ecosystem--environment--growth, development and aging--metabolism--physiology--river--russian federation--species difference--zooplankton--animals--ecology--ecosystem--environment--models, biological--rivers--russia--species specificity--zooplankton
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kravchuk E.S., Gladyshev M.I., Ivanova E.A.
Заглавие : Dependence of the domination of Anabaena flos-aquae (Lyngb.) Breb. in the phytoplankton community on the initial abundance of akinetes
Место публикации : Doklady Biological Sciences. - 2007. - Vol. 416, Is. 1-6. - С. 377-378. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496607050158
Ключевые слова (''Своб.индексиров.''): anabaena flos-aquae--anabaena--animal--article--biological model--biomass--cyanobacterium--metabolism--microbiology--physiology--phytoplankton--russian federation--season--sediment--anabaena--animals--biomass--cyanobacteria--geologic sediments--models, biological--phytoplankton--russia--seasons--water microbiology
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E.S., Prokopkin I.G.
Заглавие : Role of diapause in coexistence of zooplankton species: Model analysis
Место публикации : Doklady Biological Sciences. - 2007. - Vol. 412, Is. 1. - С. 73-75. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496607010243
Ключевые слова (''Своб.индексиров.''): animal--article--biological model--cladocera--ecosystem--female--growth, development and aging--oocyte--physiology--population dynamics--reproduction--zooplankton--animals--cladocera--ecosystem--female--models, biological--ovum--population dynamics--reproduction--zooplankton
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Adamovich V.V., Rogozin D.Yu., Degermendzhi A.G.
Заглавие : Developing the control criterion for a continuous culture of microorganisms
Место публикации : Mikrobiologiya. - 2005. - Vol. 74, Is. 1. - С. 5-16. - ISSN 00263656 (ISSN)
Ключевые слова (''Своб.индексиров.''): chemostat--control criterion--control factor--microorganism population--sensitivity coefficients--algorithm--bacterium--biological model--biomass--culture medium--ecosystem--growth, development and aging--methodology--microbiological examination--review--algorithms--bacteria--bacteriological techniques--biomass--culture media--ecosystem--models, biological
Аннотация: A short survey and critical analysis of previously proposed criteria for growth control of populations of microorganisms in the chemostat are presented. Based on the analysis of a mathematical model of the steady-state of a microbial population in the chemostat, an adequate control criterion is suggested, along with a method to identify the corresponding regulating factors. The new control criterion is expressed as a product of the factor transformation coefficient and the biomass sensitivity coefficient (SC) with respect to the change of the factor at the chemostat inlet (referred to in the sequel as the biomass SC). The control criterion determines the strength of the control exerted by this or that factor. The method of determination of the regulating factors consists in experimental determination of the real SCs for factors and the biomass and in calculating on this basis the corresponding ideal SCs for constant factor transformation coefficients. The ideal SCs are shown to add up to an integer value, a constraint that we call "quantization" relationships. Such relationships are used to test the completeness of the drawn list of control factors. The proposed method was applied to our own and literature data.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gitelson I.I., Degermendzhy A.G., Rodicheva E.K.
Заглавие : Self-restoration as fundamental property of CES providing their sustainability
Место публикации : Advances in Space Research. - 2003. - Vol. 31, Is. 7. - С. 1641-1648. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(03)00111-X
Ключевые слова (''Своб.индексиров.''): biocatalysts--ecosystems--genes--life support systems (spacecraft)--radiation damage--cell populations--space flight--space shuttle--article--biological model--biomass--cell division--chlorella--cytology--growth, development and aging--microclimate--radiation exposure--radiation response--ultraviolet radiation--biomass--cell division--chlorella--dose-response relationship, radiation--ecological systems, closed--life support systems--models, biological--ultraviolet rays
Аннотация: Sustainability is one of the most important criteria and evaluation of human life support systems intended for use during long space flights. The common feature of biological and physicochemical life support systems is that basically they are both catalytic. But there are two fundamental properties distinguishing biological systems: 1) they are auto-catalytic: their catalysts - enzymes of protein nature - are continuously reproduced when the system functions; 2) the program of every process performed by enzymes and the program of their reproduction are inherent in the biological system itself - in the totality of genomes of the species involved in the functioning of the ecosystem. Actually, one cell with the genome capable of the phenotypic realization is enough for the self-restoration of the function performed by the cells of this species in the ecosystem. The continuous microalgal culture of Chlorella vulgaris was taken to investigate quantitatively the process of self-restoration in unicellular algae population. Based on the data obtained, we proposed a mathematical model of the restoration process in a cell population that has suffered an acute radiation damage. В© 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Krylov A.V., Sushchik N.N., Malin M.I., Makhutova O.N., Chalova I.V., Kalacheva G.S.
Заглавие : Transfer of essential polyunsaturated fatty acids from an aquatic to terrestrial ecosystem through the fish-bird trophic pair
Место публикации : Doklady Biological Sciences. - 2010. - Vol. 431, Is. 1. - С. 121-123. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496610020146
Ключевые слова (''Своб.индексиров.''): fatty acid--fresh water--triacylglycerol--unsaturated fatty acid--animal--article--biological model--biomass--bird--chemistry--ecosystem--fish--food chain--metabolism--muscle--pathology--physiology--species difference--animals--biomass--birds--ecosystem--fatty acids--fatty acids, unsaturated--fishes--food chain--fresh water--models, biological--muscles--species specificity--triglycerides--aves
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gitelson J.I., Okladnikov Yu.N.
Заглавие : Consistency of gas exchange of man and plants in a closed ecological system: Lines of attack on the problem
Место публикации : Advances in Space Research. - 1996. - Vol. 18, Is. 1-2. - С. 205-210. - ISSN 02731177 (ISSN)
Ключевые слова (''Своб.индексиров.''): carbon dioxide--oxygen--article--atmosphere--biological model--breathing--human--metabolism--microclimate--nutrition--photosynthesis--physiology--plant--plant physiology--atmosphere--carbon dioxide--ecological systems, closed--humans--models, biological--nutrition physiology--oxygen--photosynthesis--plant physiology--plants--respiration
Аннотация: Gas exchange between man and plants in a closed ecological system based on atmosphere regeneration by plant photosynthesis is made consistent by attaining the equilibrium of human CO2 discharge and the productivity of the gas consuming bioregenerator. In this case the gas exchange might be, however, qualitatively disturbed from the equilibrium in terms of oxygen making it accumulate or decrease continuously in the air of the system. Gas exchange equilibrium in terms of O2 was attained in long-term experiments by equality of the human respiration coefficient and the plant assimilation coefficient. Varying the ratio of these parameters it is possible to control the oxygen concentration in the atmosphere to be reclaimed.
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