Biotechnological processes represent a challenge into the control field, due to its high non linearity. Particularly, continuous alcoholic fermentation by Zymomonas mobilis presents high ethanol performance, but it shows highly oscillatory behaviour in process variables, because of the influence of inhibition dynamics (rate of ethanol concentration Z and I) over Biomass, Substrate and Product c...

Exploitation of the metabolic capabilities of the genus Sphingomonas could provide important commercial benefits to biotechnology. Recent advances have demonstrated that these organisms have unique abilities to degrade refractory contaminants, to serve as bacterial antagonists to phytopathogenic fungi, and to secrete the highly useful gellan exopolysaccharides. Unfortunately, Sphingomonas are a...

1. Molar growth-yield coefficients of Zymomonas mobilis for glucose, fructose, glucose plus fructose, and sucrose are reported. Yield coefficients for sucrose are appreciably lower than those for the equivalent concentrations of glucose plus fructose. 2. Only 2.6% of [U-(14)C]glucose supplied in the growth medium is incorporated into cell substance by Z. mobilis utilizing glucose as the energy ...

Bioethanol fuel has the advantage of being more environmentally friendly than petroleum. is made from organic materials containing glucose. Baking rice contains 83.19% (w/w) carbohydrates and 29.70% amylose which can be converted into bioethanol through hydrolysis fermentation stages. This type research an experimental research, initial stage carried out to obtain reducing sugars using crude Ba...

Levan has wide applications in chemical, cosmetic, pharmaceutical and food industries. The free levansucrase is usually used the biosynthesis of levan, but poor reusability low stability have limited its large-scale use. To address this problem, surface-displayed Saccharomyces cerevisiae were generated evaluated study. from Zymomonas mobilis was displayed on cell surface EBY100 using a various ...

The sacB and sacC genes encoding levansucrase and extracellular sucrase respectively were independently subcloned in pBluescript (high copy number) and in Z. mobilis-E. coli shuttle vector, pZA22 (low copy number). The expression of these genes were compared under identical background of E. coli and Z. mobilis host. The level of sacB gene expression in E. coli was almost ten fold less than the ...