Cell Division Processes
Mostrando 13-24 de 208 artigos, teses e dissertações.
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13. Characterization of the RNA Polymerase B Transcricional Factor 3 (btf3) of Trichoderma reesei and the effect of its knockout on gene expression in stress by heat shock / Caracterização do gene do Fator Transcricional 3 da RNA Polimerase B (btf3) de Trichoderma reesei e o efeito de seu nocaute sobre a expressão gênica no estresse por choque térmico
Transcription by RNA polymerase II (RNA polymerase B) and protein synthesis are the most important metabolic processes in eukaryotic cells, and they are involved in the control of gene expression. Trichoderma reesei was used as model of study for the development of this study. This filamentous fungus is a microorganism that has been used by some laboratories
Publicado em: 2007
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14. An age-structured population balance model for microbial dynamics
This work presents an age-structured population balance model (ASPBM) for a bioprocess in a continuous stirred-tank fermentor. It relates the macroscopic properties and dynamic behavior of biomass to the operational parameters and microscopic properties of cells. Population dynamics is governed by two time- and age-dependent density functions for living and
Brazilian Journal of Chemical Engineering. Publicado em: 2003-03
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15. Identificação da enzima oxido nitrico sintase em vegetais
The enzyme nitric oxide synthase (NOS) is responsible for the synthesis of nitric oxide (NO), from the oxidation of L-arginine to L-citrulline. This enzyme has been found largely distributed in nature. In the animal kingdom, the NOS isoforms constitutively expressed are frequently Ca2+ -dependent and involved in physiological processes while Ca2+ -independen
Publicado em: 1999
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16. Cell-cycle-specific inhibition by chloramphenicol of septum fromation and cell division in synchronized cells of Bacillus subtilis.
The relationship between protein synthesis and processes of cell division was studied by using synchronized cells of Bacillus subtilis 168. The addition of chloramphenicol at the beginning of synchronous growth prevented septum formation and cell division, suggesting the requirement of protein synthesis for the processes of cell division. Experiments in whic
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17. Effects of Chromosome Underreplication on Cell Division in Escherichia coli
The key processes of the bacterial cell cycle are controlled and coordinated to match cellular mass growth. We have studied the coordination between replication and cell division by using a temperature-controlled Escherichia coli intR1 strain. In this strain, the initiation time for chromosome replication can be displaced to later (underreplication) or earli
American Society for Microbiology.
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18. Termination of DNA replication is required for cell division in Escherichia coli.
The correlation between termination of DNA replication and cell division in Escherichia coli was studied under conditions in which DNA replication was slowed down without inducing SOS functions. The experimental system used involved amino acid starvation of synchronized cells in the presence of methionine. The results further support the essential correlatio
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19. Mechanism for the Regulation of Cell Division in Agmenellum
We describe a nonlethal temperature-conditional mutant of Agmenellum quadruplicatum which allows dissociation of the processes of growth and cell division. With this system, evidence has been obtained for the regulation of one step in the process of cell division by a small effector molecule. The effector molecule is apparently released into the surrounding
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20. ENERGY EMANATION DURING CELL DIVISION PROCESSES (M-RAYS)
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21. The Forkhead Transcription Factor Fkh2 Regulates the Cell Division Cycle of Schizosaccharomyces pombe
In eukaryotes the regulation of gene expression plays a key role in controlling cell cycle progression. Here, we demonstrate that a forkhead transcription factor, Fkh2, regulates the periodic expression of cdc15+ and spo12+ in the M and G1 phases of the cell division cycle in the fission yeast Schizosaccharomyces pombe. We also show that Fkh2 is important fo
American Society for Microbiology.
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22. Distinct penicillin binding proteins involved in the division, elongation, and shape of Escherichia coli K12.
The varied effects of beta-lactam antibiotics on cell division, cell elongation, and cell shape in E. coli are shown to be due to the presence of three essential penicillin binding proteins with distinct roles in these three processes. (A) Cell shape: beta-Lactams that specifically result in the production of ovoid cells bind to penicillin binding protein 2
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23. Time-Lapse Photomicrography of Cell Growth and Division in Escherichia coli
Hoffman, Heiner (New York University, New York, N.Y.), and Michael E. Frank. Time-lapse photomicrography of cell growth and division in Escherichia coli. J. Bacteriol. 89:212–216. 1965.—Photomicrographs at 15-sec intervals of cells growing at 37 C disclosed that in a cell with a generation time of 21.0 min the processes of furrowing, cross-wall formation
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24. A non-nodulating alfalfa mutant displays neither root hair curling nor early cell division in response to Rhizobium meliloti.
The early events in the alfalfa-Rhizobium meliloti symbiosis include deformation of epidermal root hairs and the approximately concurrent stimulation of cell dedifferentiation and cell division in the root inner cortex. These early steps have been studied previously by analysis of R. meliloti mutants. Bacterial strains mutated in nodABC, for example, fail to