Acetone-butanol-ethanol (ABE) fermentation by clostridia has shown promise for industrial-scale production of biobutanol. However, the continuous ABE fermentation suffers from low product yield, titer, and productivity. Systems analysis of the continuous ABE fermentation will offer insights into its metabolic pathway as well as into optimal fermentation design and operation. For the ABE ferment...

Rhamnolipids find broad applications as natural surfactants, emulsifiers, and antibiotics because of their low toxicity, high biodegradability and environmental soundness. In this study, a pH stage-controlled process of fermentation of rhamnolipids by Pseudomonas aeruginosa O-2-2 was established. A yield of 24.06 g/L in batch fermentation was achieved in a 5-L fermentor via the optimization of ...

lysine is nutritionally essential for humans and animals. it cannot be synthesized biologically in body. children and growing animals have a high requirement of lysine, since it is needed for bone formation. therefore, it must be added to food and feed supplement to improve the protein quality. in addition, lysine has some pharmaceutical applications in the formulation of diets with balanced am...

in this study, the milk-derived galactooligosaccharides (gos) were produced by lactobacillus delbrueckii subsp. bulgaricus and refined by an ultrafiltration-nanofiltration continuous membrane. by further investigation, we found that the gos product purified by gel permeation chromatography mainly contained low molecular weight disaccharide and trisaccharide, that is, 4-β-galactobiose and tri-ga...

the aim of this study was to determine the effect of yeast culture (saccharomyces cerevisiae sc 47) addition in the diet of dairy cows on their rumen fermentation and milk production. animals received a diet tmr based on good maize silage with a higher dry matter content (14 kg), 14 kg of lucerne-grass haylage, 5 kg of crushed ears of maize, 5 kg of beet pulp silage, 3 kg of crimped wheat, 2 kg...

background: in algeria the date wastes production is estimated at least 85.000 tones. date wastes is an economic source of carbohydrates for conversion to industrial enzymes because it is readily available and relatively low priced.objective: the aim of the present study was to investigate the potential of using date wastes as a substrate for the production of a-amylase and invertase. materials...

background: mahyaveh is an iranian salted-fermented fish sauce which due to its high amount of protein has risk of histamine production. this study was carried out to determine effect of zataria multiflora essential oil (eo) on histamine production in mahyaveh. methods: dried anchovies (stolephorus sp.), refined-salt and mustard seed (brassica juncea) were purchased from the local market in ban...

The ability of cells to respond to environmental changes and adapt their metabolism enables cell survival under stressful conditions. The budding yeast Saccharomyces cerevisiae (S. cerevisiae) is particularly well adapted to the harsh conditions of anaerobic wine fermentation. However, S. cerevisiae gene function has not been previously systematically interrogated under conditions of industrial...

O artigo trata da eminência do caráter cíclico economiacapitalista, destacando que o revigoramento capital dos lucros decrescentesé dependente de modificações, fundamentais, no seio estrutura docapitalismo. Historicamente, a forma mais conhecida dessas reformas,fundamentais, estão alicerçadas em mudanças base técnica e organizacional.Na reforma estrutural submerge partir conhecidosmomentos cris...

An integrated approach for the management of continuous beer fermentation with immobilized cells was developed. Experimental results for continuous fermentation were used for the development of dependencies for the calculation of real extract and ethanol at different degrees of fermentation and dilution rates. For this purpose, mathematical relationships describing the fermentation with high ac...