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	Provedor de dados BABT (2) Autor Paca,Jan (2) Stiborova,Marie (2) Halecky,Martin (1) Klapkova,Eva (1) Komarkova,Eliska (1) Kosteckova,Alena (1) Kozliak,Evguenii (1) Paca Jr.,Jan (1) Pacova,Leona (1) Prell,Ales (1) Sobotka,Miroslav (1) Soccol,Carlos R (1) Soccol,Carlos Ricardo (1) Mais... Palavra-chave Phenol (2) Biodegradation (1) Candida tropicalis (1) Kinetics (1) Nutrition stress (1) Phenol hydroxylase (1) Respirometry (1) Starvation stress (1) Viability (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2010 (1) 2003 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Physiological changes of Candida tropicalis population degrading phenol in fed batch reactor BABT Komarkova,Eliska; Paca,Jan; Klapkova,Eva; Stiborova,Marie; Soccol,Carlos R; Sobotka,Miroslav. Candida tropicalis can use phenol as the sole carbon and energy source. Experiments regarding phenol degradations from the water phase were carried out. The fermentor was operated as a fed-batch system with oxistat control. Under conditions of nutrient limitation and an excess of oxygen the respiration activity of cells was suppressed and some color metabolites (black-brown) started to be formed. An accumulation of these products inhibited the cell growth under aerobic conditions. Another impact was a decrease of the phenol hydroxylase activity as the key enzyme of the phenol degradation pathway at the end of the cell respiration activity. This decrease is linked with the above mentioned product inhibition. The cell death studied by fluorescent probe... Tipo: Info:eu-repo/semantics/article Palavras-chave: Phenol; Biodegradation; Candida tropicalis; Phenol hydroxylase; Starvation stress; Viability. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400007 Respirometry kinetics of phenol oxidation by Comamonas testosteroni Pb50 under various conditions of nutritional stress BABT Paca,Jan; Kosteckova,Alena; Pacova,Leona; Prell,Ales; Halecky,Martin; Paca Jr.,Jan; Stiborova,Marie; Kozliak,Evguenii; Soccol,Carlos Ricardo. Kinetics of phenol biodegradation using suspended biomass of Comamonas testosteroni Pb50 (monoculture) was measured under conditions of nutrient abundance, limitation, and prolonged cell starvation in a fed-batch reactor, with phenol being the sole carbon and energy source. The pre-washed cells were applied for measurement of the phenol and oxygen uptake rates at varied starting phenol concentrations with the kinetic parameters calculated using the Haldane model. The results revealed that nutrient limitation significantly suppressed the maximum value of exogenous respiration rate while the endogenous respiration rate, affinity and tolerance to phenol increased. By contrast, cell starvation resulted in a drop of both the exogenous and endogenous respiration... Tipo: Info:eu-repo/semantics/article Palavras-chave: Respirometry; Kinetics; Phenol; Nutrition stress. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000600030 Registros recuperados: 2 Primeira ... 1 ... Última

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