Heterolactic Fermentation
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Sugar cane silage for sheep and goats: nutritive value, performance and ingestive behavior / Silagem de cana-de-açúcar na alimentação de ovinos e caprinos: valor nutritivo, desempenho e comportamento ingestivo
Sugar cane ensiled without controlling ethanol production results in low quality roughage and may decrease voluntary feed intake and animal performance. Sugar cane silages nutritive value and their effects on performance and ingestive behavior of lactating goats and feedlot lambs were evaluated in different trials. Thirty-nine Saanen does were used to evalua
Publicado em: 2006
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2. Change from Homo- to Heterolactic Fermentation by Streptococcus lactis Resulting from Glucose Limitation in Anaerobic Chemostat Cultures
Lactic streptococci, classically regarded as homolactic fermenters of glucose and lactose, became heterolactic when grown with limiting carbohydrate concentrations in a chemostat. At high dilution rates (D) with excess glucose present, about 95% of the fermented sugar was converted to l-lactate. However, as D was lowered and glucose became limiting, five of
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3. Carbohydrate Fermentation by Streptococcus cremoris and Streptococcus lactis Growing in Agar Gels
When lactic streptococci were embedded in agar gels and incubated at 30°C, the end products of carbohydrate fermentation depended on the initial cell density, which determined the subsequent distribution and size of colonies in the gel. With high initial cell densities, microcolonies formed close together and lactose and glucose were converted almost entire
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4. THE MECHANISM OF THE HETEROLACTIC FERMENTATION: A NEW ROUTE OF ETHANOL FORMATION1
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5. Effect of environmental pH on fermentation balance of Lactobacillus bulgaricus.
When Lactobacillus bulgaricus NLS-4 was grown anaerobically in continuous culture with limiting glucose, a shift in the pH of the medium from the acidic to the alkaline range caused this normally homofermentative bacterium to catabolize glucose in a heterofermentative fashion. The change in the nature of the fermentation was accompanied by a decrease in lact
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6. Isolation and Characterization of Nisin-Resistant Leuconostoc mesenteroides for Use in Cabbage Fermentations
Leuconostoc mesenteroides strains that are resistant to high levels of nisin (up to 25,000 IU/ml in broth) were isolated. These nisin-resistant mutants were evaluated to determine their potential use as starter culture strains for cabbage fermentations. We found that some L. mesenteroides strains could be adapted to high levels of nisin resistance, while oth
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7. Pentitol metabolism in Lactobacillus casei.
Strains of Lactobacillus casei capable of growing on either ribitol or xylitol carry out a heterolactic fermentation producing ethanol, acetate, and a mixture of D- and L-lactate. Following conversion of the pentitols to ribulose 5-phosphate or xylulose 5-phosphate via enzymatic steps unique to these organisms, the intermediate products are further metaboliz
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8. Changes in Microbial Population During Fermentation of Feedlot Waste with Corn
A new process for recycling feedlot waste involves the fermentation of liquid from this waste combined with corn. Changes in the flora of this silage-like fermentation were followed. The fermentation was dominated by lactobacilli and yeasts, which initially constitute 1% or less of the natural flora. The species of yeasts and lactics involved were characteri
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9. β-Glucose-1-Phosphate, a Possible Mediator for Polysaccharide Formation in Maltose-Assimilating Lactococcus lactis
Homolactic fermentation of glucose and heterolactic fermentation of maltose with Lactococcus lactis 65.1 were confirmed. When moles of glucose were compared, the uptake rates of the two carbon sources were similar. The intracellular concentration of fructose-1,6-diphosphate (FDP) in maltose-assimilating cells was half of that in glucose-assimilating cells. S
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10. Complete genome sequence of the marine planctomycete Pirellula sp. strain 1
Pirellula sp. strain 1 (“Rhodopirellula baltica”) is a marine representative of the globally distributed and environmentally important bacterial order Planctomycetales. Here we report the complete genome sequence of a member of this independent phylum. With 7.145 megabases, Pirellula sp. strain 1 has the largest circular bacterial genome sequenced s
National Academy of Sciences.
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11. Microbial Community Dynamics during Production of the Mexican Fermented Maize Dough Pozol
The dynamics of the microbial community responsible for the traditional fermentation of maize in the production of Mexican pozol was investigated by using a polyphasic approach combining (i) microbial enumerations with culture media, (ii) denaturing gradient gel electrophoresis (DGGE) fingerprinting of total community DNA with bacterial and eukaryotic primer
American Society for Microbiology.
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12. Influence of the Lactose Plasmid on the Metabolism of Galactose by Streptococcus lactis
Streptococcus lactis strain DR1251 was capable of growth on lactose and galactose with generation times, at 30°C, of 42 and 52 min, respectively. Phosphoenolpyruvate-dependent phosphotransferase activity for lactose and galactose was induced during growth on either substrate. This activity had an apparent Km of 5 × 10−5 M for lactose and 2 × 10−2 M fo