We show that a transient lactic fermentation provides the signal triggering ethanol production in hypoxic maize root tips. The signal is cytoplasmic pH. This interaction between lactic and ethanolic fermentation permits tight cytoplasmic pH regulation during hypoxia--cytoplasmic pH remaining near neutrality for several hours. Mutant roots unable to synthesize ethanol can neither regulate cytopl...

Lactic acid has been shown to have the most promising application in biomaterials as poly(lactic acid). L. rhamnosus ATCC 10863 that produces L-lactic acid was used to perform the fermentation and molasses was used as substrate. A solution containing 27.6 g/L of sucrose (main composition of molasses) and 3.0 g/L of yeast extract was prepared, considering the final volume of 3,571 mL (14.0% (v/v...

BACKGROUND AND AIMS Lactulose fermentation by the intestinal microflora acidifies the gut contents, resulting in an increased resistance to colonisation by acid sensitive pathogens. The extent of fermentation should be controlled to prevent acid induced epithelial cell damage. Considering the buffering capacity of calcium phosphate and its intestinal cytoprotective effects, whether supplemental...

Biodegradable polymers have attracted much attention from an environmental point of view. Optically pure lactic acid that can be prepared by fermentation is one of the important raw materials for biodegradable polymer. The separation and purification of lactic acid from the fermentation broth are the major portions of the production costs. We proposed the application of supported ionic liquid m...

Furfural residues produced from the furfural industry were investigated as a substrate for lactic acid production by simultaneous saccharification and fermentation (SSF). Alkaline peroxide was used for delignification of furfural residues to improve the final lactic acid concentration. The residue was treated with 1.3% to 1.7% hydrogen peroxide at 80 °C for 1 h with a substrate concentration of...

It is well recognized that products other than lactic acid may be produced by homofermentative lactic acid-producing streptococci. Small quantities of formic, acetic, propionic, and butyric acids, ethanol, carbon dioxide, 2,3-butanediol, acetoin, and biacetyl have been reported as metabolic products of these organisms (Hammer, 1920; Foster, 1921; Langwill, 1924; Long and Hammer, 1936). Of these...

Lactobacilli are universally recognized as probiotics that are widely used in the adjuvant treatment of inflammatory diseases, such as vaginitis and enteritis. With the overuse of antibiotics in recent years, the lactobacilli in the human body are killed, which could disrupt the microecological balance in the human body and affect health adversely. In this work, cephalosporin-resistant Lactobac...

It is well recognized that products other than lactic acid may be produced by homofermentative lactic acid-producing streptococci. Small quantities of formic, acetic, propionic, and butyric acids, ethanol, carbon dioxide, 2,3-butanediol, acetoin, and biacetyl have been reported as metabolic products of these organisms (Hammer, 1920; Foster, 1921; Langwill, 1924; Long and Hammer, 1936). Of these...

AIMS The overall kinetics of the fermentation of four oat fractions obtained by debranning using three potentially probiotic lactic acid bacteria were investigated. The main objective was to study the suitability of these fractions as fermentation media for the growth and the metabolic production of bacteria isolated from human intestine. METHODS AND RESULTS The cell growth, lactic acid produ...