Yeast strains expressing heterologous L-lactate dehydrogenases can produce lactic acid. Although these microorganisms are tolerant of acidic environments, it is known that at low pH, lactic acid exerts a high level of stress on the cells. In the present study we analyzed intracellular pH (pHi) and viability by staining with cSNARF-4F and ethidium bromide, respectively, of two lactic-acid-produc...

Exopolysaccharides produced in situ by lactic acid bacteria during sourdough fermentation are recognized as bread texture improvers. In this study, the suitability of whole and sprouted lentil flours, added with 25% on flour weight sucrose for dextran formation selected strains fermentation, was evaluated. The synthesized Weissella confusa SLA4 9.2 9.7% w/w sourdoughs, respectively. Wheat suppl...

the potential of bulk starter fermentation strategy for production of a cost-effective and safe source of β-galactosidase was investigated. three different bulk starter media with different compositions were selected, and an industrial yogurt starter culture strain, l. bulgaricus dsm 20081 was cultivated in these media under ph-controlled conditions (ph=5.6) at 43°c. the media consisted of 1) b...

Eagon, R. G. (University of Georgia, Athens), and H. W. Cho. Major products of glucose dissimilation by Pseudomonas natriegens. J. Bacteriol. 89:1209-1211. 1965.-Pseudomonas natriegens aerobically catabolized glucose to yield predominantly acetic acid, pyruvic acid, and CO(2), whereas little or no lactic acid was formed. Under anaerobic conditions, glucose in an enriched medium was fermented to...

in this study, microwave-assisted solvent extraction (mase) was used to recover oil residues from pomace olive using acidic hexane. results obtained demonstrated that oil extraction yield increased with time, the amount of acetic acid in hexane and power radiation. for both radiation powers used (170 and 510w), the optimal extraction time and most interesting content of acetic acid in hexane ar...

Whey with a large amount of BOD(50000 PPM) is a dangerous environmental pollutant.this important source of lavtose(4-5%) is A USEFULL SUBSTRATE FOR A RANGE of fermentation processes.lacitic acid with swvwral applications in industries is one of these products.Specially L(+) isomer of this acid worthing 10 times as much as the mixture of L&D,is used in medical purposes such as absorbable surgica...

in this study, lactic acid production by repeated batch fermentation using cell entrapped methods was compared. barium alginate beads, agar gel and polyurethane foam cubes were employed as carriers to immobilize lactobacillus casei subsp. casei for the purpose of l (+)-lactic acid production. increasing concentrations of lactic acid during fermentation were better tolerated by barium alginate e...