BACKGROUND Production of second-generation bioethanol and other bulk chemicals by yeast fermentation requires cells that tolerate inhibitory lignocellulosic compounds at low pH. Saccharomyces cerevisiae displays high plasticity with regard to inhibitor tolerance, and adaptation of cell populations to process conditions is essential for reaching efficient and robust fermentations. RESULTS In t...

The caecal fermentation pattern, including methanogenesis, was studied in young rabbits using in vitro batch incubations. Six conventional litters of eight rabbits each were used. At the age of 22, 25, 28, 32, 36, 42 and 56 days, an animal was slaughtered from each litter and its caecal contents were used for in vitro batch incubations at 39 degrees C/24 h. The incubated samples were analysed f...

Microbial production of 2,3-butanediol (2,3-BDO) has been attracting increasing interest because of its high value and various industrial applications. In this study, high production of 2,3-BDO using a previously isolated bacterium Klebsiella oxytoca M1 was carried out by optimizing fermentation conditions and overexpressing acetoin reductase (AR). Supplying complex nitrogen sources and using N...

The medium composition and fermentation conditions of Ganoderma applanatum(GA) strain were optimized by the liquid shake flask fermentation, and the antioxidant activity of exopolysaccharides was investigated. The results showed that the optimal conditions of the liquid fermentation of GA strain were as follows: Carbon source was corn powder, nitrogen source was soy powder, the initial pH was 6...

Fermentation characteristics of four strains of brewer's yeast (Saccharomyces cerevisiae strain 70424, S.rouxii strain 2535, S. rouxii strain 2531 and Saccharomyces ludwigii strain 3447) in Yeast Moldbrothcontaining four different fermentable sugars (glucose, fructose, maltose, or sucrose) were studied. Theaim was to consider the suitability of different strain/sugar treatment...

BACKGROUND Microbial oil is one important bio-product for its important function in energy, chemical, and food industry. Finding suitable substrates is one key issue for its industrial application. Both hydrophilic and hydrophobic substrates can be utilized by oleaginous microorganisms with two different bio-pathways ("de novo" lipid fermentation and "ex novo" lipid fermentation). To date, most...

The characteristic aromas at each stage of chocolate processing change in quantity and quality depending on the cocoa variety, chemical composition beans, specific protein storage content, polysaccharides polyphenols determining type precursors formed during fermentation drying process, leading to formation subsequent roasting conching processes. Bean aroma is frequently profiled, identified, s...

Optimization of multiple objectives and constraints of fermentation process problems have been extensively studied in recent years. High-performance, robust, cost-effective and reliable computing models that provide innovative solutions to fermentation problems have been developed. This paper reviews the problems of the optimal design of batch fermentation technology and the development of comp...

Effects of starter cultures, Lactobacillus sake and Pediococcus acidilactici, on the survival of Yersinia enterocolitica were studied in Turkish dry sausage (sucuk). Inoculated Y. enterocolitica (approximately 5.0 log CFU/ g) was eliminated completely in sausages by L. sake (about 7.0 log CFU/g) and P. acidilactici (about 7.0 log CFU/g) by the 3rd d of fermentation but was not totally eliminate...

BACKGROUND VHG fermentation is a promising process engineering strategy aiming at improving ethanol titer, and thus saving energy consumption for ethanol distillation and distillage treatment. However, sustained process oscillation was observed during continuous VHG ethanol fermentation, which significantly affected ethanol fermentation performance of the system. RESULTS Sustained process osc...