Gluconobacter
Mostrando 1-12 de 30 artigos, teses e dissertações.
-
1. Effects of oxygen transfer coefficient on dihydroxyacetone production from crude glycerol
Abstract The principal objective of this study was to evaluate the kinetics of dihydroxyacetone production by Gluconobacter frateurii CGMCC 5397 under different oxygen volumetric mass transfer coefficient (kLa) conditions in submerged bioreactors using biodiesel-derived crude glycerol as the carbon source. kLa is a key fermentation parameter for the producti
Braz. J. Microbiol.. Publicado em: 2016-03
-
2. Cultivable endophytic bacteria from leaf bases of Agave tequilana and their role as plant growth promoters
Agave tequilana Weber var. 'Azul' is grown for the production of tequila, inulin and syrup. Diverse bacteria inhabit plant tissues and play a crucial role for plant health and growth. In this study culturable endophytic bacteria were extracted from leaf bases of 100 healthy Agave tequilana plants. In plant tissue bacteria occurred at mean population densitie
Braz. J. Microbiol.. Publicado em: 2014-12
-
3. Preparação e caracterização de bioanodos para biocélula a combustível etanol/O2 / Preparation and characterization of bioanodes for ethanol/O2 biofuel cell
Este trabalho descreve a preparação e caracterização de bioanodos para biocélula a combustível etanol/O2 utilizando enzimas desidrogenases, tanto com transferência eletrônica mediada como com transferência eletrônica direta. Na primeira etapa do trabalho, os resultados de cinética enzimática com as enzimas comerciais álcool desidrogenase e alde�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/09/2012
-
4. Estudo de bactérias do gênero Gluconobacter: isolamento, purificação, identificação fenotípica e molecular
A importância do estudo de bactérias acéticas, em especial as do gênero Gluconobacter, está baseada em suas aplicações industriais, pois estas possuem a capacidade de bioconversão de sorbitol a sorbose, viabilizando o processo de produção de vitamina C. O estudo envolveu coletas de amostras em indústrias de refrigerante, flores, frutos e mel, segu
Food Science and Technology. Publicado em: 2010-03
-
5. Análise comparativa dos genes de reparo do DNA em Gluconacetobacter diazotrophicus e Gluconobacter oxydans
Gluconacetobacter diazotrophicus é uma alfa-proteobactéria Gram-negativa, tolerante a meios ácidos, fixadora de nitrogênio atmosférico e foi a primeira bactéria diazotrófica endofítica isolada da cana-de-açúcar. Por sua vez, Gluconobacter oxydans, também alfa-proteobactéria Gram-negativa, possui a capacidade de oxidar incompletamente alcoóis e c
Publicado em: 2009
-
6. Avaliação do potencial de oxidoredução enantiosseletiva de bactérias termotolerantes do gênero Acetobacter. / The potential of thermotolerant Acetobacter strains for enantioselective oxidoreduction.
Álcool desidrogenase NAD-independente, enzima ligada a membrana, das espécies Acetobacter e Gluconobacter mostram apreciável enantioseletividade na oxidação de álcoois quirais primários e secundários. Em estudos anteriores, esta enzima foi isolada e caracterizada de espécies mesofílicas Acetobacter sp como uma quinohemoproteína álcool desidrogena
Publicado em: 2005
-
7. NADPH-Dependent l-Sorbose Reductase Is Responsible for l-Sorbose Assimilation in Gluconobacter suboxydans IFO 3291
The NADPH-dependent l-sorbose reductase (SR) of l-sorbose-producing Gluconobacter suboxydans IFO 3291 contributes to intracellular l-sorbose assimilation. The gene disruptant showed no SR activity and did not assimilate the once-produced l-sorbose, indicating that the SR functions mainly as an l-sorbose-reducing enzyme in vivo and not as a d-sorbitol-oxidizi
American Society for Microbiology.
-
8. Microbiology of Ripening Honey
Two main groups of bacteria, classified as Gluconobacter and Lactobacillus, are present in ripening honey. A third bacterial group, classified as Zymomonas, and several types of yeast are occasionally isolated. Both in natural honey and in synthetic syrup the bacterial population decreases in the course of the ripening process. Lactobacillus and Gluconobacte
-
9. 5-Keto-d-Gluconate Production Is Catalyzed by a Quinoprotein Glycerol Dehydrogenase, Major Polyol Dehydrogenase, in Gluconobacter Species
Acetic acid bacteria, especially Gluconobacter species, have been known to catalyze the extensive oxidation of sugar alcohols (polyols) such as d-mannitol, glycerol, d-sorbitol, and so on. Gluconobacter species also oxidize sugars and sugar acids and uniquely accumulate two different keto-d-gluconates, 2-keto-d-gluconate and 5-keto-d-gluconate, in the cultur
American Society for Microbiology.
-
10. Cloning of genes coding for L-sorbose and L-sorbosone dehydrogenases from Gluconobacter oxydans and microbial production of 2-keto-L-gulonate, a precursor of L-ascorbic acid, in a recombinant G. oxydans strain.
We have purified L-sorbose dehydrogenase (SDH) and L-sorbosone dehydrogenase (SNDH) from Gluconobacter oxydans T-100 that showed an ability to convert D-sorbitol to 2-keto-L-gulonate (2-KLGA). A genomic library of Gluconobacter oxydans T-100 was screened with a probe, a 180-bp PCR product which was obtained from degenerate oligodeoxyribonucleotides based on
-
11. Cloning of Escherichia coli lacZ and lacY Genes and Their Expression in Gluconobacter oxydans and Acetobacter liquefaciens
An efficient transformation protocol for Gluconobacter oxydans and Acetobacter liquefaciens strains was developed by preparation of electrocompetent cells grown on yeast extract-ethanol medium. Plasmid pBBR122 was used as broad-host-range vector to clone the Escherichia coli lacZY genes in G. oxydans and A. liquefaciens. Although both lac genes were function
American Society for Microbiology.
-
12. Intracytoplasmic membrane formation and increased oxidation of glycerol growth of Gluconobacter oxydans.
Gluconobacter oxydans is well known for the limited oxidation of compounds and rapid excretion of industrially important oxidation products. The dehydrogenases responsible for these oxidations are reportedly bound to the cell's plasma membrane. This report demonstrates that fully viable G. oxydans differentiates at the end of exponential growth by forming de