background and objective: sorbitol is a non-toxic and slightly hygroscopic compound with different applications. zymomonas mobiles produces sorbitol from sucrose or mixtures of glucose and fructose (formation is coupled with the dehydrogenation of glucose to glucono-δ- lactone). recombinant zymomonas mobilis may produce sorbitol and gluconic acid from glucose and fructose using different divale...

the presence of unsaturated fatty acids and phytosterols in hazelnuts and hazelnut products, including hazelnut milk, are useful for health, especially for preventing cardiovascular disease. fermentation with probiotic microorganisms present in kefir grain increases the functional properties of the products. hazelnut milk is nutritious and can be used in drinks in addition to whey. the present ...

Background: The energy crisis and climate change necessitate studying and discovering of new processes involved in the production of alternative and renewable energy sources. Very high gravity (VHG) fermentation is one such process improvement aimed at increasing both the rate of fermentation and ethanol concentration. The technology involves preparation and fermentation of media containing 300...

An experiment was conducted to examine changes in VFA and ammonia concentrations at different time points using 4 fermentable carbohydrate-rich feed ingredients as substrates and feces of unweaned piglets as inoculum. Fecal inoculum was collected, pooled, and mixed from 9 specially raised (no creep feed or antibiotics) crossbred piglets at 3 wk of age. Inulin, lactulose, molasses-free sugar bee...

A new variety of Streptomyces hygroscopicus was isolated from a Kalamazoo soil. This isolate is described and identified as var. geldanus. When fermented in preferential media it produces geldanamycin, nigericin, nocardamine, and a libanamycin-like activity. Fermentation conditions, chromatographic separation, and antimicrobial spectra of the antibiotics are given.

Alpha amylase production using microbial source and solid state fermentation has been conducted for past few years in search of thermostable enzyme. Owing to the prolific use of thermostable alpha amylase in various industries like paper, food, detergent, brewing and starch liquefaction process, the production of alpha amylase is still going on. In the present work, Bacillus subtilis (ATCC 6633...

The effect of CO2 pressure on commercial S.cerevisiae cells viability and on the rate of ethanol production in yeast, has been studied in batch cultures under 1,10 and 18 bar of CO2 pressures. The results show that the effect of CO2 pressure on ethanol productivity strongly depends on the temperature, glucose and starting biomass concentration and pressure itself. Under atmospheric CO2 pressure...

In shake flask andfermentor studies, various media components and culture inocula were tested to improve P. fumosoroseus spore production rates, yield and stability. To evaluate inoculum potential and inoculum scale-up for fermentor studies, conidia and liquid culture-produced spores of various strains ofP. fumosoroseus were compared as inoculum. Inoculation of liquid cultures with blastospores...

Corresponding Author: Norma Suárez Department of Biotechnology, Institute of Hygiene, Faculty of Medicine University of the Republic. Uruguay Phone: +5982 487 1288 ext 1123. Fax: +5982 487 3073 E-mail: [email protected] Abstract: Streptococcus pneumoniae, a major bacterial pathogen worldwide, requires a complex medium for culture, which complicates harvesting of antigens for vaccine produc...

Comparative assays demonstrated that the probability of error was 12.1% when testing the aerobic fermentation of trehalose by coagulase negative staphylococci when this carbohydrate was added to the medium prior to sterilization whereas the error was only 2.7% in media if filtered trehalose was added subsequent to steam sterilization of the medium.