منابع مشابه
Malolactic fermentation by Streptococcus mutans.
Streptococcus mutans and certain other oral lactic-acid bacteria were found to have the ability to carry out malolactic fermentation involving decarboxylation of L-malate to yield L-lactic acid and concomitant reduction in acidity. The activity was inducible by L-malate in S. mutans UA159 growing in suspensions or biofilms. The optimal pH for the fermentation was c. 4.0 for both suspensions and...
متن کاملChemiosmotic energy from malolactic fermentation.
By using the luciferase-luciferin ATP assay and whole cells of Leuconostoc oenos, we have demonstrated that malolactic fermentation does yield ATP. This energy-yielding mechanism did not occur in a cell extract and was inhibited in the presence of dicyclohexylcarbodiimide or an ionophore such as monensin. A lactate:proton efflux mechanism for this proposed pathway is presented.
متن کاملTemperature compensation of ultrasonic velocity during the malolactic fermentation process
Ultrasonic properties of materials present a strong dependence on temperature and in turn the ultrasonic velocity of propagation in the material under test. It is precisely for this reason that most ultrasonic measurements are often carried out with thermostated samples by using either water tanks or climate chambers. This approach is viable in a laboratory and when the measured or characterize...
متن کاملImpact of malolactic fermentation on low molecular weight phenolic compounds.
A reversed phase liquid chromatography-DAD method is proposed for analysis of major non-flavonoid phenolic compounds in wines. The method employed a mixture of acetic acid, water and methanol as eluents and was used to evaluate the impact of malolactic fermentation in low molecular phenolic compounds. The wines analyzed underwent different treatments, like the addition of a pectolytic enzyme or...
متن کاملMalolactic Activity of Lactic Acid Bacteria during Sauerkraut Fermentation
The frequency of lactic acid bacteria (LAB) involved in sauerkraut fermentation with (MDC+) or without (MDC–) the ability to decarboxylate malic acid was determined. The MDC+ phenotype was found in > 99% of homofermentative LAB isolated from commercial fermentations. In contrast, heterofermentative LAB isolates from 0.25, 3, 7, and 10 d had only 53%, 54%, 15%, and 11% MDC+ phenotype, respective...
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ژورنال
عنوان ژورنال: South African Journal of Enology & Viticulture
سال: 2016
ISSN: 2224-7904
DOI: 10.21548/31-2-1417