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Kinetic aspects of wine spoilage by acetic acid bacteria
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014587.pdf
Date
1991
Author
Kösebalaban, Figen
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https://hdl.handle.net/11511/5203
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Graduate School of Natural and Applied Sciences, Thesis
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Rumen microorganisms were used in a batch fermentor to investigate whether they could be used to produce acetic acid, propionic acid, butyric acid, and methane from cotton fibers. The kinetics of product formation were studied with the initial medium pH values of 6.0, 7.0, and 8.0. Propionic acid, butyric acid, and methane production were growth associated; acetic acid production was found to be nongrowth associated. The largest amounts of bacteria and protozoa were attained with the initial pH of 7.0. T...
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KINETICS OF WINE SPOILAGE BY ACETIC-ACID BACTERIA
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Acid production in wines inoculated with acetic acid bacteria from vinegar was studied at 15-degrees-C, 20-degrees-C, 25-degrees-C and 30-degrees-C and simulated with kinetic models. Results indicated that major wine spoilage did not occur during the growth of the microorganisms, but during their extended presence at high concentrations during the stationary and death phases. Acetophilic species were observed to resist death, which is in agreement with the mechanism suggested by Kittelmann et al.9 for the d...
KINETIC COMPENSATION RELATIONS FOR ASCORBIC-ACID DEGRADATION AND PECTINESTERASE INACTIVATION DURING ORANGE JUICE PASTEURIZATION
ULGEN, N; OZILGEN, M (Wiley, 1991-01-01)
The thermal degradation kinetics of ascorbic acid and the inactivation kinetics of pectinesterase were studied experimentally with pH-adjusted orange juice. No simple trends were observed in variation of the kinetic parameters with pH, but both kinetic functions agreed with kinetic compensation relations. An isokinetic temperature was observed for ascorbic acid degradation at pH 2.5, 3.0, and 3.5 implying that the same degradation mechanism was valid at these pH values. A large deviation at pH 4.0 from t...
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F. Kösebalaban, “Kinetic aspects of wine spoilage by acetic acid bacteria,” Middle East Technical University, 1991.