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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Degermendzhy A.G., Pechurkin N.S., Terskov I.A.
Заглавие : The mathematical theory of population waves (Russian)
Место публикации : Studia Biophysica. - 1974. - Vol. 43, Is. 1. - С. 25-40. - ISSN 00816337 (ISSN)
Ключевые слова (''Своб.индексиров.''): evolution--mathematical model--model--population explosion--population model--theoretical study
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ladygina V.P., Pechurkin N.S., Terskov I.A.
Заглавие : Influence of the abiogenic link on a predator population in the development of a simple biological community in a chemostat
Место публикации : Doklady Biochemistry. - 1976. - Vol. 227, Is. 1-6. - С. 173-175. - ISSN 00124958 (ISSN)
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shilin V.I., Pechurkin N.S., Brilkov A.V.
Заглавие : Positive growth cooperativity effect (Allee effect) in bacterial populations on simple medium
Место публикации : Doklady Biological Sciences. - 1983. - Vol. 271, Is. 1-6. - С. 367-370. - ISSN 00124966 (ISSN)
Ключевые слова (''Своб.индексиров.''): bacterium--growth rate--nonhuman--population density
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : SHILIN V.I., PECHURKIN N.S., BRILKOV A.V., BELIANKINA N.I., TERSKOV I.A.
Заглавие : POSITIVE EFFECT OF THE GROWTH COOPERATIVITY OF BACTERIA POPULATION (ALLEE EFFECT) IN A SIMPLE MEDIUM
Колич.характеристики :4 с
Место публикации : DOKLADY AKADEMII NAUK SSSR: MEZHDUNARODNAYA KNIGA, 1983. - Vol. 271, Is. 2. - P505-508. - ISSN 0002-3264
Примечания : Cited References: 15
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Kokova V.E., Spitskaya N.I.
Заглавие : CONTINUOUS CULTIVATION OF SOME WATER INVERTEBRATES
Место публикации :. - 1984. - Third European Congress on Biotechnology., Munich, W Ger) Conference code: 6973. - P539-543
Ключевые слова (''Своб.индексиров.''): marine biology--artificial ecological systems--continuous cultivation--population growth rate--range conditions--suspended nutrients--water invertebrates--ecology
Аннотация: Continuous cultivation of water invertebrates facilitates the study of their biological characteristics and productivity and hence contributes to creation of artifical ecological systems. When applying the technique, suspended nutrients are being passed through the cultivator and culture is outflowing continuously, with the volume inside the vessel being constant. The objective of the study is to examine the effect of a range conditions of cultivating on population growth rate.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nedorezov L.V., Khlebopros R.G.
Заглавие : Peculiarities of dynamics of population numbers in strongly inertial and without inertial regulation
Место публикации : ZH. OBSHCH. BIOL. - 1985. - Vol. 46, Is. 3. - С. 345-348
Ключевые слова (''Своб.индексиров.''): entomophage--mathematical model--nonbiological model--nonhuman--phytophage
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : PECHURKIN N.S., BRILKOV A.V., BOGUCHAROV A.A., PISMAN T.I., GITELZON I.I.
Заглавие : POPULATION STABILITY OF LUMINESCENT BACTERIA PHOTOBACTERIUM-LEIOGNATHI IN THE CONTINUOUS CULTURE
Колич.характеристики :5 с
Место публикации : DOKLADY AKADEMII NAUK SSSR: MEZHDUNARODNAYA KNIGA, 1987. - Vol. 294, Is. 4. - P1012-1016. - ISSN 0002-3264
Примечания : Cited References: 15
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : PUKHOVA Y.I., MAKARSKAYA G.V., KRIGER N.V.
Заглавие : PHENOTYPIC CHARACTERISTICS OF A POPULATION OF NORMAL KILLER CELLS OF AUTOLOGOUS ERYTHROCYTES
Колич.характеристики :4 с
Место публикации : Bull. Exp. Biol. Med.: PLENUM PUBL CORP, 1989. - Vol. 107, Is. 1. - P72-75. - ISSN 0007-4888, DOI 10.1007/BF00837064
Примечания : Cited References: 15
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : POPOVA L.Y., LUTSKAYA N.I., BOGUCHAROV A.A., BRILKOV A.V., PECHURKIN N.S.
Заглавие : POPULATION-STRUCTURE DYNAMICS OF A RECOMBINANT STRAIN OF ESCHERICHIA-COLI IN CONTINUOUS CULTURE
Колич.характеристики :6 с
Место публикации : Microbiology: MAIK NAUKA/INTERPERIODICA, 1992. - Vol. 61, Is. 4. - С. 417-422. - ISSN 0026-2617
Примечания : Cited References: 10
Аннотация: We studied the population structure of Escherichia coli strain Z905, carrying the recombinant plasmid of the Ap(r)Lux+ phenotype, in continuous culture in a chemostat. We found that the maintenance of a stable, defined ratio of plasmidless to plasmid-carrying cells in the population depended primarily on the presence in the medium of the selective factor (ampicillin), and also on the nature of the growth-limiting carbon and energy source.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : DEGERMENDZHI A.G., ADAMOVICH V.V., ADAMOVICH V.A.
Заглавие : A NEW EXPERIMENTAL-METHOD TO REVEAL DENSITY-DEPENDENT CHEMICAL FACTORS INVOLVED IN MICROBIAL-POPULATION GROWTH-CONTROL
Место публикации : Microbiology: MAIK NAUKA/INTERPERIODICA, 1993. - Vol. 62, Is. 3. - С. 308-313. - 6. - ISSN 0026-2617
Примечания : Cited References: 11
Аннотация: Experiments based on an earlier developed theory with a culture of Escherichia coli 0-124 were undertaken to determine the feedback strength (FBS) in growth control. FBS is defined as the change in growth acceleration brought about by a discontinuous reduction in microbial concentration under conditions of constant chemical composition of the medium, and is an over-all measure of the regulatory influence of all chemical factors dependent on biomass concentration. FBS was determined for batch cultivation with glucose. In various growth phases the culture was diluted by its own filtrate and then the change in growth acceleration as compared to the control was measured. FBS was reliably different from zero at the end of the exponential phase and in the phase of decelerated growth and was of the order of -20 to -200 (h.g/liter)(-1). The feedback component due to glucose alone was estimated using the obtained relation between specific growth rate and glucose concentration (mu(max) = 0.55 +/- 0.05 h(-1), K-s = 2.5 +/- 0.7 mg/liter). The glucose-dependent regulatory contribution to FBS was found to be as low as 0.5 to 40%, which suggests the presence of other growth control factors. Upon accuracy improvements, this method may develop into an accepted microbiological tool for identifying major density-dependent factors involved in microbial growth control.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E.S., Gubanov V.G.
Заглавие : The influence of population density of Moina macrocopa (Cladocera) and food supply on the change of reproducing type in M-macrocopa
Колич.характеристики :2 с
Место публикации : Russ. J. Ecol.: MAIK NAUKA/INTERPERIODICA, 1995. - Vol. 26, Is. 5. - С. 381-382. - ISSN 1067-4136
Примечания : Cited References: 8
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E.S., Gubanov V.G.
Заглавие : The role of population density in gamogenesis induction in moina macrocopa (Cladocera: Crustaceae)
Место публикации : Zhurnal Obshchei Biologii. - 1996. - Vol. 57, Is. 3. - С. 366-367. - ISSN 00444596 (ISSN)
Аннотация: Combined influence of population density, temperature and photoperiod on the gamogenesis of individual females of M. macrocopa was investigated. In all experiments the influence of population density was associated with the direct effect of "swarm water". The photoperiod in its broad natural range also influences gamogenesis induction. The increase in temperature above optimum but lower than lethal level sharply decreases the efficiency of gamogenesis. In this case stimulation of gamogenesis is possible by combined effect of poor feeding and high population density. If temperature and photoperiod are optimum for partenogenetic population the change of reproduction mode in lowdensity population of M. macrocopa is determined by poor feeding while in high-density populations density itself is more important. However the increase in food concentration descreases the efficiency of "swarm water" on the gamogenesis induction. According to the hypothesis of nondirect influence of population density an individual decreases its filtarion rate (and starves) under "swarm water" condition.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Gitelzon I.I., Puzyr APO
Заглавие : Size of heterogeneity in bacterial population when accumulating and degradating polyhydroxbutyrate
Место публикации : Dokl. Akad. Nauk: MEZHDUNARODNAYA KNIGA, 1996. - Vol. 346, Is. 4. - С. 558-561. - 4. - ISSN 0869-5652
Примечания : Cited References: 10
Предметные рубрики: CELL
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bazykin A.D., Berezovskaya F.S., Isaev A.S., Khlebopros R.G.
Заглавие : Dynamics of forest insect density: Bifurcation approach
Место публикации : Journal of Theoretical Biology. - 1997. - Vol. 186, Is. 3. - С. 267-278. - ISSN 00225193 (ISSN) , DOI 10.1006/jtbi.1996.0363
Ключевые слова (''Своб.индексиров.''): article--ecology--forest--insect--nonhuman--population density--population dynamics--population model--priority journal
Аннотация: Six basic phase portraits differing in character and in the number of their equilibrium behaviour regimes were suggested in the classification of forest insect population dynamics. The portraits graphically illustrate six types of dynamic behavior of numbers of the system 'phytophage-entomophage': two types of stable equilibrium dynamics (stationary and oscillatory) and four types corresponding to outbreaks of mass reproduction - fixed, permanent, reversive and true outbreaks, respectively. In this paper we consider the single parameter model, with its parametric domains realizing a wide spectrum of phase dynamics, both basic and transitional. The changes in the phase portraits are accompanied by the bifurcations in the model. The results of these analyses are in agreement with the 'stability principle of mobile ecological systems' and may supply its parameter substantiation at the model level.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kargatova T.V., Maksimova E.E., Popova L.Yu., Bril'kov A.V., Pechurkin N.S.
Заглавие : Phenotypic variability of the population of a recombinant luminescent strain of escherichia coli in aqueous microcosms
Место публикации : Microbiology. - 1997. - Vol. 66, Is. 1. - С. 85-90. - ISSN 00262617 (ISSN)
Аннотация: The behavior of Escherichia coli Z905, carrying a recombinant plasmid pPHL7 with genes determining ampicillin resistance and bacterial luminescence, and the efficiency of expression of cloned genes were studied after introduction of the strain into model aqueous ecosystems with different trophic chain lengths. The E. coli Z905 variants isolated from ecosystems after different periods of time were found to vary in their resistance to ampicillin (from 50 to 0.05 ?g/ml) and in the intensity of bioluminescence. An increase in the concentration of the selective factor (ampicillin) or in the extent of the aqueous microcosm blooming restored the expression of the recombinant plasmid genes in some clones. В© 1997 MAHK Hayka/Interperiodica Publishing.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popova L.Y., Kargatova T.V., Maksimova E.E., Belyavskaya V.A.
Заглавие : A study on the possibility of environmental adaptation of a Bacillus subtilis strain containing a recombinant plasmid with the gene of human interferon alpha 2
Колич.характеристики :5 с
Место публикации : Microbiology: MAIK NAUKA/INTERPERIODICA, 1997. - Vol. 66, Is. 6. - P637-641. - ISSN 0026-2617
Примечания : Cited References: 13
Предметные рубрики: GENETICALLY-MODIFIED MICROORGANISMS
Ключевые слова (''Своб.индексиров.''): microecosystem--bacillus subtilis--recombinant plasmid--interferon--adaptation
Аннотация: Adaptation of the Bacillus subtilis strain 2335/105 (Km(r)Inf(+)) containing a recombinant plasmid encoding the extracellular human interferon alpha 2 was studied under various conditions. Stability of the plasmid in the population of B. subtilis 2335/105 was estimated under nonselective conditions. The plasmid-free cells and cells with a low number of plasmid copies were found to accumulate progressively, constituting 80% of the population after 10 culture passages, indicating the poor competitiveness of cells carrying a high number of plasmid copies. The behavior of vegetative cells of the recombinant strain introduced into aquatic microcosms differing in trophic chain length was studied. Within the first 10 days, the lysis of vegetative cells of B. subtilis 2335/105 occurred; the number of viable spores was very low but remained constant for half a year.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kargatova T.V., Maksimova E.E., Popova L.Yu., Bril'Kov A.V., Pechurkin N.S.
Заглавие : Phenotypic variability of the population of a recombinant luminescent strain of escherichia coli in aqueous microcosms
Место публикации : Mikrobiologiya. - 1997. - Vol. 66, Is. 1. - С. 101-106. - ISSN 00263656 (ISSN)
Ключевые слова (''Своб.индексиров.''): article--escherichia coli--genetic recombination--genetics--luminescence--microbiology--penicillin resistance--phenotype--plasmid--ampicillin resistance--escherichia coli--luminescent measurements--phenotype--plasmids--recombination, genetic--water microbiology
Аннотация: The behavior of Escherichia coli Z905, carrying a recombinant plasmid pPHL7 with genes determining ampicillin resistance and bacterial luminescence, and the efficiency of expression of cloned genes were studied after introduction of the strain into model aqueous ecosystems with different trophic chain lengths. The E. coli Z905 variants isolated from ecosystems after different periods of time were found to vary in their resistance to ampicillin (from 50 to 0.05 ?g/ml) and in the intensity of bioluminescence. An increase in the concentration of the selective factor (ampicillin) or in the extent of the aqueous microcosm blooming restored the expression of the recombinant plasmid genes in some clones.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kargatova T.V., Maksimova E.E., Popova L.Y., Brilkov A.V., Pechurkin N.S.
Заглавие : Phenotypic variability of the population of a recombinant luminescent strain of Escherichia coli in aqueous microcosms
Колич.характеристики :6 с
Место публикации : Microbiology: MAIK NAUKA/INTERPERIODICA, 1997. - Vol. 66, Is. 1. - С. 85-90. - ISSN 0026-2617
Примечания : Cited References: 12
Предметные рубрики: GENETICALLY-MODIFIED MICROORGANISMS
Аннотация: The behavior of Escherichia coil Z905, carrying a recombinant plasmid pPHL7 with genes determining ampicillin resistance and bacterial luminescence, and the efficiency of expression of cloned genes were studied after introduction of the strain into model aqueous ecosystems with different trophic chain lengths. The E. coli Z905 variants isolated from ecosystems after different periods of time were found to vary in their resistance to ampicillin (from 50 to 0.05 mu g/ml) and in the intensity of bioluminescence. An increase in the concentration of the selective factor (ampicillin) or in the extent of the aqueous microcosm blooming restored the expression of the recombinant plasmid genes in some clones.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E.S., Gubanov V.G., Egorov I.V.
Заглавие : The influence of food concentration and "water of aggregation" on the reproductive parameters of Moina macrocopa (Crustacea: Cladocera) females
Место публикации : Zhurnal Obshchei Biologii. - 1998. - Vol. 59, Is. 1. - С. 55-57. - ISSN 00444596 (ISSN)
Аннотация: Combined influence of "water of aggregation" and food concentration on the reproductive parameters of Moina macrocopa females was investigated. In all experiments the influence of population density was associated with the effect of "water of aggregation" prepared earlier by keeping dense population (200 ?g/ml) of M. macrocopa. It was shown that life-span of M. macrocopa females in "water of aggregation" was not dependent on food concentration; under conditions of all tested food concentration it was less than in case of control clean water. There was no difference in proportion of males produced in "water of aggregation" and in control though more males were born under conditions of higher food concentration. In general "water of aggregation" causes a specific acceleration of female life history: the life-span and the period between clutches decrease, the amount of neonates in last clutches increases while the chance of male production at the beginning of reproduction period becames greater. The "water of aggregation" could also causes the formation of ephipial eggs instead of the first partenogenetic clutch. It seems that life strategy under conditions of very high mortality associated with "water of aggregation" is aimed to maximum realization of individual capacities in short period of time.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Maksimova E.E., Popova L.Yu., Shpagina V.V., Belyavskaya V.A., Pechurkin N.S.
Заглавие : Effect of environmental factors on the expression of the catabolite-dependent lux-operon borne by a recombinant plasmid
Место публикации : Mikrobiologiya. - 1998. - Vol. 67, Is. 2. - С. 170-175. - ISSN 00263656 (ISSN)
Ключевые слова (''Своб.индексиров.''): catabolite repression--environmental factors--escherichia coli--introduction into model ecosystems--lux-operon--recombinant plasmid--regulation of expression--recombinant dna--article--bacterial gene--chemoluminescence--culture medium--escherichia coli--gene expression regulation--genetics--microbiology--molecular cloning--operon--plasmid--chemiluminescent measurements--cloning, molecular--culture media--dna, recombinant--escherichia coli--gene expression regulation, bacterial--genes, bacterial--operon--plasmids--water microbiology
Аннотация: Expression of the lux-genes cloned on the recombinant plasmid pPHL7 (Ap rLux +) in Escherichia coli Z905 cells was studied in various environments, including model aquatic ecosystems. Expression of the lux-genes strongly depended on the nutritional status of the medium. In particular, the cultivation of cells in nutrient-rich medium favored the maintenance of the initial level of expression of the lux-operon, whereas nutrient limitation induced recombinant cell variants with an impaired control of the catabolite-dependent luxoperon. On the other hand, long-term laboratory cultivation of the recombinant strain in nutrient-deficient media or its long-term life in model aquatic ecosystems led to the accumulation of cells with a stringent control on the cloned lux-genes in the bacterial population. The presence of the selective factor (ampicillin) in the medium had no significant effect on the expression of the lux-operon.
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