Optimization of L-(+)-lactic acid production by ring and disc plastic composite supports through repeated-batch biofilm fermentation

Article Abstract:

The effects of plastic composite supports (PCSs) nutrient leaching on long term lactic acid fermentation in an environment having low concentration of complex nutrient batch were studied. The research optimized lactic acid fermentation by using a lowered yeast extract concentration in the medium and an increased glucose concentration in the fermentor. The medium flow rate is then reduced in the bioreactor's recycling loop. Results reveal that the PCS bioreactors shortened the lag phase and fermentation rate.

Lactic acid, Bioreactors

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Characteristics and efficiency of glutamine production by coupling of a bacterial glutamine synthetase reaction with the alcoholic fermentation system of baker's yeast

Article Abstract:

Research was conducted to examine characteristics and efficiency of glutamine production regarding product yield based on the energy source for ATP regeneration and regarding the reactivity of bacterial glutamine synthetase during glutamine production. The use of a yeast mutant strain having low assimilating ability for glycerol and ethanol led to a result suggestive of improved glutamine yield under the conditions with lower concentrations of inorganic phosphate.

Yeast, Yeast (Food product), Adenosine triphosphate, ATP, Ligases, Glutamine, Regeneration (Biology)

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Elucidation of enzymes in fermentation pathways used by Clostridium thermosuccinogenes growing on inulin

Article Abstract:

The biochemical pathway involved in the fermentation of inulin by Clostridium thermosuccinogenes is discussed. It involves nine enzymes and the ratio of oxidized products to reduced products increased as the temperature increased from 58 to 70 deg C.

Clostridium

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