The issues of biological conversion products processing plant raw materials remain invariably relevant. development secondary resources allows to increase the efficiency food production, solving environmental problems and contribute ensuring security. paper presents data on results studies biotechnological properties yeast cultures Zygosaccharomyces kombuchaensis sp. bacteria Gluconoacetobacter...

A second cellulose synthase gene (acsAII) coding for a 175-kDa polypeptide that is similar in size and sequence to the acsAB gene product has been identified in Acetobacter xylinum AY201. Evidence for the presence of this gene was obtained during analysis of A. xylinum mutants in which the acsAB gene was disrupted (I.M. Saxena, K. Kudlicka, K. Okuda, and R.M. Brown, Jr., J. Bacteriol. 176:5735-...

Introduction Acetobacter pasteurianus is among the major bacteria responsible for acetic fermentation and gives the characteristic taste of vinegar, can be found as a contaminant of wine production industry. In industrial fermentation is frequent contamination by lactic acid bacteria such as Lactobacillus fermentum that competes with the yeast for nutrients and inhibiting their growth, slow the...

Cellulose was produced heterotrophically from different carbon substrates by carrot tissue cultures and Acetobacter xylinum (a cellulose-producing bacterium) and by castor bean seeds germinated in the dark, in each case in the presence of water having known concentration of oxygen-18 ((18)O). We used the relationship between the amount of (18)O in the water and in the cellulose that was synthes...

Gluconacetobacter diazotrophicus is an N(2)-fixing endophyte isolated from sugarcane. G. diazotrophicus was grown on solid medium at atmospheric partial O(2) pressures (pO(2)) of 10, 20, and 30 kPa for 5 to 6 days. Using a flowthrough gas exchange system, nitrogenase activity and respiration rate were then measured at a range of atmospheric pO(2) (5 to 60 kPa). Nitrogenase activity was measured...

Biodirected epitaxial nanodeposition of polymers was achieved on a template with an oriented molecular surface. Acetobacter xylinum synthesized a ribbon of cellulose I microfibrils onto a fixed, nematic ordered substrate of glucan chains with unique surface characteristics. The substrate directed the orientation of the motion due to the inverse force of the secretion during biosynthesis, and th...

In resting Acetobacter suboxydans cells, glycerol can be oxidized beyond the dihydroxyacetone stage, and sorbitol, beyond the sorbose stage (King and Cheldelin, 1952a). 2 ,4-Dinitrophenol inhibits the further oxidation of dihydroxyacetone or sorbose but has no effect upon the first step oxidations (King and Cheldelin, 1952b). Since these keto derivatives can be metabolized further by resting ce...

The nucleotide sequence of the Acetobacter xylinum uridine diphosphoglucose pyrophosphorylase gene was determined; this is the first procaryotic uridine diphosphoglucose pyrophosphorylase gene sequence reported. The sequence data indicated that the gene product consists of 284 amino acids. This finding was consistent with the results obtained by expression analysis in vivo and in vitro in Esche...

The influence of hemicelluloses on the aggregation of cellulose in higher plant cell walls was modelled by adding hemicelluloses to cultures of the cellulose producer Acetobacter xylinum. Characterization of the celluloses by X-ray diffractometry showed them to be more like those that occur in higher plants; the coaggregation of the hemicelluloses suggests their occlusion within and between the...

Underkofler et al. (1943) first demonstrated that pantothenic acid is an essential requirement for Acetobacter suboxydans, ATCC 621, and that this organism responds to pantolactone in a pantothenate deficient medium. j5-Alanine, however, is not able to replace pantothenic acid. Subsequently, Sarett and Cheldelin (1945) described the assay of pantolactone using the same strain of A. suboxydans. ...