Библиотека института биофизики СО РАН

Главная

Базы данных

Труды сотрудников ИБФ СО РАН - результаты поиска

Вид поиска

Каталог книг и продолжающихся изданий библиотеки Института биофизики СО РАН

Иностранные журналы библиотеки Института биофизики СО РАН

Отечественные журналы библиотеки Института биофизики СО РАН

Каталог диссертаций ИБФ СО РАН

Труды сотрудников ИБФ СО РАН

Область поиска

в найденном

Найдено в других БД:

Каталог книг и продолжающихся изданий библиотеки Института биофизики СО РАН (4)

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>K=methodology<.>)

Общее количество найденных документов : 40
Показаны документы с 1 по 20

1-20 21-40

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Berzhanzkaya L.Y., Gitel'zon I.I., Fish A.M.
Заглавие : Bioluminescence of bacteria: a rhythmic process
Место публикации : BIOPHYSICS. - 1973. - Vol. 18, Is. 2. - С. 293-301. - ISSN 00063509 (ISSN)
Ключевые слова (''Своб.индексиров.''): bacterium--computer--in vitro study--methodology--microorganism--theoretical study
Аннотация: New results obtained in the detection of rhythms in the low frequency range in the light signal of a small number of photo bacteria are reported. The luminescence of a small number of bacteria was recorded with an apparatus the sensitivity of which was 12 quanta/pulse. To check the possible rhythms in the luminescence of the bacteria, correlation analysis was made of the interpulse intervals of the detection of the signal with a computer. This revealed a definite rhythm in the bacterial luminescence the fundamental frequency of which lies in the region 8 c/s. Profound modulation of a bioluminescent signal at this and multiple frequencies was demonstrated. The harmonic components found in the spectrum of the signal refute the existing view of the continuous character of bacterial luminescence.
Scopus
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Terskov I.A., Gitel'zon I.I., Shevyrnogov A.P.
Заглавие : Measurement of chlorophyll in surface waters from an airplane
Место публикации : Doklady Biophysics. - 1976. - Vol. Vol.226-228. - С. 30-33. - ISSN 00124974 (ISSN)
Ключевые слова (''Своб.индексиров.''): chlorophyll--methodology
Scopus
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Terskov I.A., Gitelzon I.I., Sidko Ya. F.
Заглавие : Biological and nutritional value of the hydrogen bacteria biomass
Место публикации : Prikladnaya Biokhimiya i Mikrobiologiya. - 1984. - Vol. 20, Is. 4. - С. 540-550. - ISSN 05551099 (ISSN)
Ключевые слова (''Своб.индексиров.''): alcaligenes eutrophus--diet--methodology--nonhuman--nutritional value
Scopus
Найти похожие

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.
Scopus
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : GORBAN A.N., MIRKES E.M., POPOVA T.G., SADOVSKY M.G.
Заглавие : THE COMPARATIVE REDUNDANCY OF GENES OF VARIOUS ORGANISMS AND VIRUSES
Колич.характеристики :7 с
Место публикации : Genetika: MEZHDUNARODNAYA KNIGA, 1993. - Vol. 29, Is. 9. - P1413-1419. - ISSN 0016-6758
Примечания : Cited References: 20
Предметные рубрики: CODON
Аннотация: This paper is devoted to the comparative stude of redundancy of genetic texts of various organisms and viruses. To determine the tedundance of a gene, we have introduced the strict measure for that latter. The measure for a text's redundance is the length of restriction of Frequence/Correlation Dictionary of a given genetic text. Frequence/Correlation Dictionary is the ser of all subsequences belang to a given genetic text, accompanied by the frequencies of their occurrence. The restriction length is defined as that one, for which all the subsequences (of that length) are unique. We have found, that genes of human viruses are less redundant, in comparison to those of human genes. Other aspects of a comparative redundance invastigations of the genes are discussed. The problem of the determination of truet intron could be treated by this methodology, as well, as the evolution of genome.
WOS
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sushchik N.N., Gladyshev M.I., Kalachova G.S., Guseynova V.E.
Заглавие : Rapid assay of fatty acid composition using a portable high-performance liquid chromatograph for monitoring aquatic ecosystems
Место публикации : Journal of Chromatography A. - 1995. - Vol. 695, Is. 2. - С. 223-228. - ISSN 00219673 (ISSN) , DOI 10.1016/0021-9673(94)01090-2
Ключевые слова (''Своб.индексиров.''): fatty acid--alga--article--culture medium--ecology--high performance liquid chromatography--instrument--methodology--priority journal--ultraviolet spectrophotometry--water analysis
Аннотация: The chromatographic conditions presented allowed the separation of the nitrophenacyl derivatives of standards of eleven free fatty acids (FFA) using a portable high-performance chromatograph, suitable for use aboard a research vessel. A statistically significant linear correlation between UV absorbance and amount of the analytes injected was obtained. The method was tested on FFA from algae cultural media. The method can be used for the ecological monitoring of natural waters.
Scopus
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lisovsky G.M., Gitelson J.I., Shilenko M.P., Gribovskaya I.V., Trubachev I.N.
Заглавие : Direct utilization of human liquid wastes by plants in a closed ecosystem
Место публикации : Advances in Space Research. - 1997. - Vol. 20, Is. 10. - С. 1801-1804. - ISSN 02731177 (ISSN)
Ключевые слова (''Своб.индексиров.''): fertilizer--nitrogen--sodium chloride--urea--article--biomass--culture medium--feasibility study--human--metabolism--methodology--microclimate--sewage--urine--waste management--wheat--biomass--culture media--ecological systems, closed--feasibility studies--fertilizers--humans--nitrogen--sodium chloride--triticum--urea--urine--waste disposal, fluid--waste management
Аннотация: Model experiments in phytotrons have shown that urea is able to cover 70% of the demand in nitrogen of the conveyer cultivated wheat. At the same time wheat plants can directly utilize human liquid wastes. In this article by human liquid wastes the authors mean human urine only. In a long-term experiment on "man-higher plants" system with two crewmen, plants covered 63 m2, with wheat planted to - 39.6 m2. For 103 days, complete human urine (total amount - 210.7 1) wassupplied into the nutrient solution for wheat. In a month and a half NaCl supply into the nutrient solution stabilized at 0.9-1.65 g/l. This salination had no marked effect on wheat production. The experiment revealed the realistic feasibility to directly involve liquid wastes into the biological turnover of the life support system. The closure of the system, in terms of water, increased by 15.7% and the supply of nutrients for wheat plants into the system was decreased. Closedness of biological turnover of matter in a man-made "man - higher plants" ecological system might involve, among other processes, direct utilization of human liquid wastes by plants. The amount of urine comprises 15-20% of the total amount of water cycling within the system including water as part of food, household, hygiene and potable water necessary for man. What is more, it they contains most nitrogen-bearing compounds emitted by man, almost all of the NaCl and some other substances involved in the biological turnover. Human liquid wastes can be utilized either by preliminary physical-chemical treatment (evaporating or freezing out the water, finally oxidizing the organic matter, isolating the mineral components required for plants, etc.) and further involvement of the obtained products or by direct application into the nutrient solution for plants. The challenge of direct utilization is that plants have no need of Na+ and Cl-, and also the organic forms of nitrogen emitted by man cannot fully meet the demand of plants forthis element. Besides, hygienic and/or psychological reasons make it desirable to avoid direct use of liquid wastes in the nutrient solutions that would have direct contact with edible part of plants (tubers, roots, bulbs). Feasibility of direct utilization of liquid wastes by plants in a closed "man - higher plants" ecosystem has been experimentally studied on wheat - grain culture as a model plant with the edible part in the form of seeds spatially dissociated with the nutrient medium. The wheat covered 60-65% of the area under higher plants. The studies have been carried out in "Bios-3"experimental facility described in detail elsewhere (Lisovsky, 1979; Gitelson et al., 1989). В© 1997 COSPAR. Published by Elsevier Science Ltd.
Scopus
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sarangova A.B., Somova L.A.
Заглавие : A new enzymatic technique to estimate the efficiency of microbial degradation of pollutants
Место публикации : Advances in Space Research. - 1997. - Vol. 20, Is. 10. - С. 2049-2052. - ISSN 02731177 (ISSN)
Ключевые слова (''Своб.индексиров.''): catalase--hydrogen peroxide--aerobic metabolism--article--bacterium--biomass--bioremediation--enzymology--metabolism--methodology--microbiology--sewage--waste management--water management--aerobiosis--bacteria--biodegradation, environmental--biomass--catalase--hydrogen peroxide--sewage--waste management--water microbiology--water purification
Аннотация: Dynamics of active sludge microorganism activity in aerotanks under chemostat conditions has been studied. Dependence of microorganism catalase activity has been found to depend on residual substrate concentration in proportion to the biomass of microorganisms. Experimental data and field observations has formed the basis to develop a technique to evaluate in relative units the amount of the substrate consumed by biocenosis of the active sludge in the air tanks of purification facilities. В© 1997 COSPAR. Published by Elsevier Science Ltd.
Scopus
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Salisbury F.B., Gitelson J.I., Lisovsky G.M.
Заглавие : Bios-3: Siberian experiments in bioregenerative life support
Место публикации : BioScience. - 1997. - Vol. 47, Is. 9. - С. 575-585. - ISSN 00063568 (ISSN)
Ключевые слова (''Своб.индексиров.''): agriculture--chlorella--construction work and architectural phenomena--crop--energy metabolism--evaluation--growth, development and aging--human--metabolism--methodology--microbiology--microclimate--nasa discipline life support systems--non-nasa center--photon--review--russian federation--space flight--nasa discipline life support systems--non-nasa center--agriculture--chlorella--crops, agricultural--ecological systems, closed--energy metabolism--environment, controlled--environmental microbiology--evaluation studies--facility design and construction--humans--life support systems--photons--siberia--space flight--space simulation
Scopus
Найти похожие

10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gitelson J.I., Tirranen L.S., Borodina E.V., Rygalov V.Ye.
Заглавие : Impaired growth of plants cultivated in a closed system: Possible reasons
Место публикации : Advances in Space Research. - 1997. - Vol. 20, Is. 10. - С. 1927-1930. - ISSN 02731177 (ISSN)
Ключевые слова (''Своб.индексиров.''): air conditioning--air pollutant--article--culture medium--growth, development and aging--human--hydroponics--methodology--microbiology--microclimate--plant--sewage--wheat--air conditioning--air pollutants--culture media--ecological systems, closed--environment, controlled--humans--hydroponics--life support systems--plants--triticum--waste disposal, fluid--water microbiology
Аннотация: Plants in experiments on "man-higher plants" closed ecosystem (CES) have been demonstrated to have inhibited growth and reduced productivity due to three basic factors: prolonged usage of a permanent nutrient solution introduction into the nutrient medium of intra-system gray water, and closure of the system. Gray water was detrimental to plants the longer the nutrient solution was used. However, higher plant growth was mostly affected by the gaseous composition of the CES atmosphere, through accumulation of volatile substances. В© 1997 COSPAR. Published by Elsevier Science Ltd.
Scopus
Найти похожие

11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuznetsov A.M., Rodicheva E.K., Medvedeva S.E.
Заглавие : Analysis of river water by bioluminescent biotests
Место публикации : Luminescence. - 1999. - Vol. 14, Is. 5. - С. 263-265. - ISSN 15227235 (ISSN)
Ключевые слова (''Своб.индексиров.''): bioluminescent bioassay--pollution--water quality--fresh water--article--bioassay--escherichia coli--freeze drying--genetic procedures--luminescence--methodology--photobacterium--russian federation--sensitivity and specificity--water pollutant--biological assay--biosensing techniques--escherichia coli--freeze drying--fresh water--luminescence--photobacterium--russia--sensitivity and specificity--water pollutants, chemical
Аннотация: The bacterial bioluminescence has high sensitivity to the action of various inhibitors of biological activity. The lyophilized luminous bacteria Photobacterium phosphoreum (Microbiosensor B17 677F) and luminous strain Escherichia coli (Microbiosensor EC) from the Culture Collection IBSO were used to create bioluminescent biotests. They have been applied in ecological monitoring to determine the overall toxicity of the Yenisei and Angara Rivers and some water sources of Altai Territory. As a rule the heaviest pollution of water in studied rivers was registered near cities and settlements. The luminous bacteria biotests are simple and convenient in work, standardized and quantitative, have rapid response to actions of different substances and high sensitivity to environmental pollutants. It takes less than 30 min to do the biotest (the other biotests take 48-96 h). Copyright В© 1999 John Wiley & Sons, Ltd.
Scopus
Найти похожие

12.

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
Найти похожие

13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pechurkin N.S., Maryasova T.
Заглавие : Methodology of biospherics for theoretical sciences and practical use.
Место публикации : Life support & biosphere science : international journal of earth space. - 2000. - Vol. 7, Is. 2. - С. 219-224. - ISSN 10699422 (ISSN)
Ключевые слова (''Своб.индексиров.''): article--biomass--ecosystem--energy metabolism--food chain--microclimate--theoretical model--biomass--ecological systems, closed--ecosystem--energy metabolism--food chain--life support systems--models, theoretical
Аннотация: This article deals with some methodological aspects of biospherics connected with theoretical sciences development and prospective use for practical application. Properties of experimental objects, methods and goals of biospherics as synthesising science have been discussed. The problem of stability of incomplete (natural and artificial) ecosystems has been considered. The concept of the ecosystem health based on effective functioning of different types of ecosystems has been developed.
Scopus
Найти похожие

14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sid'ko A.F., Shevyrnogov A.P.
Заглавие : Seasonal dependence of the spectral brightness of agricultural crops on plant chlorophyll content and physiological parameters
Место публикации : Earth Observ. Remote Sens.: HARWOOD ACAD PUBL GMBH, 2000. - Vol. 16, Is. 3. - С. 487-500. - 14. - ISSN 1024-5251
Примечания : Cited References: 18
Аннотация: The paper analyses the results of multi-year studies of the state of agricultural crops based on plant reflectance during the growth period. A universal methodology for determining the physiological state, and plant phytopigment content from the value of the chlorophyll potential S(t) in the region of the red absorption band lambda = 680 nm, which can be determined from the SEC values, is presented. It is shown that addition of mineral fertilisers (and, in particular, nitrogen) to soils, in on average 10 days slows the process of chlorophyll breakdown in phytocoenoses in comparison with control areas.
Найти похожие

15.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Lankin J.P.
Заглавие : Adaptive simulation of atmospheric phenomena
Колич.характеристики :12 с
Место публикации : EIGHTH INTERNATIONAL SYMPOSIUM ON ATMOSPHERIC AND OCEAN OPTICS: ATMOSPHERIC PHYSICS. Ser. PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE): SPIE-INT SOC OPTICAL ENGINEERING, 2002. - Vol. 4678: 8th International Symposium on Atmospheric and Ocean Optics - Atmospheric Physics (JUN 25-29, 2001, IRKUTSK, RUSSIA). - P668-679. - ISBN 0277-786X, DOI 10.1117/12.458507. - ISBN 0-8194-4433-2
Примечания : Cited References: 46
Ключевые слова (''Своб.индексиров.''): atmosphere--system--adaptation--self-adaptation--neuroinformatics
Аннотация: The paper describes scientific methodology of developing complex nonlinear dynamic models which form the basis of a new scientific trend called Stikhioniks(1) and are a efficient tool to devise atmosphere models. The model is aimed to develop complexly organized hierarchical non-equilibrium adaptive systems with a wide range of connections and elements and is a new step as related to the now dominant mechanical-statistical paradigm.
WOS
Найти похожие

16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sadovsky M.G.
Заглавие : Information capacity of symbol sequences
Колич.характеристики :13 с
Место публикации : Open Syst. Inf. Dyn.: KLUWER ACADEMIC PUBL, 2002. - Vol. 9, Is. 1. - P37-49. - ISSN 1230-1612, DOI 10.1023/A:1014230928565
Примечания : Cited References: 23
Предметные рубрики: REDUNDANCY
INTRONS
Аннотация: The information capacity of sequences is considered through the calculation of specific entropy of their frequency dictionary. The specific entropy was calculated against the reconstructed dictionary which bears the most probable continuations of shorter strings. The measure developed allows to distinguish the sequences both from the random ones, and those with high level of (rather simple) order. Some applications of the developed methodology to genetics, bioinformatics, and linguistics axe discussed.
WOS
Найти похожие

17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tikhomirov A.A., Ushakova S.A., Manukovsky N.S., Lisovsky G.M., Kudenko Yu.A., Koyalev V.S., Gribovskaya I.V., Tirranen L.S., Zolotukhin I.G., Gros J.B., Lasseur Ch.
Заглавие : Synthesis of biomass and utilization of plants wastes in a physical model of biological life-support system
Место публикации : Acta Astronautica. - 2003. - Vol. 53, Is. 4-10. - С. 249-257. - ISSN 00945765 (ISSN) , DOI 10.1016/S0094-5765(03)00137-1
Ключевые слова (''Своб.индексиров.''): ecosystems--microorganisms--ph--photosynthesis--plants (botany)--synthesis (chemical)--waste utilization--biological life support systems (blls)--gas exchange--plant respiration--biomass--carbon dioxide--agaricales--article--biomass--bioremediation--growth, development and aging--hydroponics--incineration--metabolism--methodology--microbiology--microclimate--photosynthesis--plant physiology--radish--space flight--waste management--weightlessness--wheat--agaricales--biodegradation, environmental--biomass--carbon dioxide--ecological systems, closed--environmental microbiology--hydroponics--incineration--life support systems--photosynthesis--plant physiology--raphanus--space flight--triticum--waste management--weightlessness
Аннотация: The paper considers problems of biosynthesis of higher plants' biomass and "biological incineration" of plant wastes in a working physical model of biological LSS. The plant wastes are "biologically incinerated" in a special heterotrophic block involving Califomian worms, mushrooms and straw. The block processes plant wastes (straw, haulms) to produce soil-like substrate (SLS) on which plants (wheat, radish) are grown. Gas exchange in such a system consists of respiratory gas exchange of SLS and photosynthesis and respiration of plants. Specifics of gas exchange dynamics of high plants - SLS complex has been considered. Relationship between such a gas exchange and PAR irradiance and age of plants has been established. Nitrogen and iron were found to the first to limit plants' growth on SLS when process conditions are deranged. The SLS microflora has been found to have different kinds of ammonifying and denitrifying bacteria which is indicative of intensive transformation of nitrogen-containing compounds. The number of physiological groups of microorganisms in SLS was, on the whole, steady. As a result, organic substances - products of exchange of plants and microorganisms were not accumulated in the medium, but mineralized and assimilated by the biocenosis. Experiments showed that the developed model of a man-made ecosystem realized complete utilization of plant wastes and involved them into the intrasystem turnover. В© 2003 International Astronautical Federation. Published by Elsevier Science Ltd. All rights reserved.
Scopus
Найти похожие

18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gros J.B., Poughon L., Lasseur C., Tikhomirov A.A.
Заглавие : Recycling efficiencies of C,H,O,N,S, and P elements in a biological life support system based on micro-organisms and higher plants
Место публикации : Advances in Space Research. - 2003. - Vol. 31, Is. 1. - С. 195-199. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(02)00739-1
Ключевые слова (''Своб.индексиров.''): biomass--biosynthesis--chemical elements--earth atmosphere--ecosystems--life support systems (spacecraft)--manned space flight--microorganisms--plants (botany)--wastes--compartments--space research--carbon--carbon dioxide--hydrogen--nitrogen--oxygen--phosphorus--sulfur--space technology--article--biological model--biomass--chemistry--comparative study--computer simulation--growth, development and aging--metabolism--methodology--microbiology--microclimate--plant--waste management--biomass--carbon--carbon dioxide--computer simulation--ecological systems, closed--environmental microbiology--hydrogen--life support systems--models, biological--nitrogen--oxygen--phosphorus--plants, edible--sulfur--waste management
Аннотация: MELiSSA is a microorganism based artificial ecosystem conceived as a tool for understanding the behavior of ecosystems and developing the technology for future Manned Space Missions. MELiSSA is composed of four compartments colonized by the microorganisms required by the function of this ecosystem : breakdown of waste produced by men, regeneration of atmosphere and biosynthesis of edible biomass. This paper reports the mass balance description of a Biological Life Support System composed of the MELiSSA loop and of a Higher Plant Compartment working in parallel with the photosynthetic Spirulina compartment producing edible biomass. The recycling efficiencies of the system are determined and compared for various working conditions of the MELiSSA loop with or without the HPC. В© 2002 Published by Elsevier Science Ltd on behalf of COSPAR.
Scopus
Найти похожие

19.

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.
Scopus
Найти похожие

20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sadovsky M.G.
Заглавие : Comparison of real frequencies of strings vs. the expected ones reveals the information capacity of macromoleculae
Колич.характеристики :16 с
Место публикации : J. Biol. Phys.: SPRINGER, 2003. - Vol. 29, Is. 1. - P23-38. - ISSN 0092-0606, DOI 10.1023/A:1022554613105
Примечания : Cited References: 45
Предметные рубрики: DNA-SEQUENCE
ENTROPY
REDUNDANCY
Ключевые слова (''Своб.индексиров.''): dictionary--entropy--information capacity--markov model--ordered sequence--random sequence--reconstructed dictionary--specific entropy
Аннотация: The information capacity of nucleotide sequences is defined through the calculation of specific entropy of their frequency dictionary. The specific entropy of the frequency dictionary is calculated against the reconstructed dictionary; this latter bears the most probable continuations of the shorter strings. This developed measure allows to distinguish the sequences both from the randons ones, and from those with high level of (rather simple) order. Some implications of the developed methodology in the fields of genetics, bioinformatics, and molecular biology are discussed.
WOS
Найти похожие