The effects of 16 sugars (arabinose, cellobiose, fructose, galactose, gentiobiose, glucose, inositol, lactose, maltose, mannitol (a sugar alcohol), mannose, melibiose, ribose, sorbitol, trehalose, and xylose) on sweet potato whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) survival were determined using in vitro bioassays. Of these sugars, arabinose, mannose, ribose, and xylose were...

Abbreviations: aa, amino acid; AGPase, ADP-glc pyrophosphorylase; ara, arabinose; gal, galactose; galA, galacturonic acid; GALT, gal-1-P uridyltransferase; glc, glucose; glcA, glucuronic acid; man, mannose; PPi, pyrophosphate; SuSy, sucrose synthase; UAGPase, UDP-N-acetylglucosamine pyrophosphorylase; UGE, UDP-glc epimerase; UGPase, UDP-glc pyrophosphorylase; USPase, UDP-sugar pyrophosphorylase...

Clostridial fermentation of cellulose and hemicellulose relies on the cellular physiology controlling the metabolism of the cellulosic hexose sugar (glucose) with respect to the hemicellulosic pentose sugars (xylose and arabinose) and the hemicellulosic hexose sugars (galactose and mannose). Here, liquid chromatography-mass spectrometry and stable isotope tracers in Clostridium acetobutylicum w...

Cybernetic models, developed earlier by the authors, have been evaluated experimentally for the growth of Klebsiella oxytoca in batch cultures using mixed substrates from glucose, xylose, arabinose, lactose, and fructose. Based entirely on information procured from batch growth on single substrates, the models accurately predict without further parameter fitting, diauxic growth on mixed substra...

The hydroaromatic acids shikimate and quinate, which may be available as carbon sources in the soil, supported production of only low levels of acidic exopolysaccharide by Bradyrhizobium japonicum. Exopolysaccharide production (micrograms per 10 cells) was 4.9 on quinate and 4.5 on shikimate; in comparison, it was 128 on adipate, 18 on l-arabinose, and 39 on d-glucose.

Agricultural and agro-industrial residues (agro-residues) containing high amounts of carbohydrates, such as cellulose and hemicellulose, are produced in large amounts annually worldwide.1,2 Agro-residues are attractive raw materials of biorefinery processes producing value-added products due to their relatively low commercial value, renewability and abundant availability.3 Biorefining of agro-r...

A new Salmonella enterica serovar Typhimurium strain has been constructed to facilitate tightly regulated gene expression. Arabinose-inducible and glucose-repressible expression of a T7 RNA polymerase gene that has been integrated with an adjacent araC-P(BAD) control element into the bacterial chromosome allows dynamic control of T7 promoter-driven RNA transcription.

A cybernetic model to predict the low-growth-rate behavior of bacteria in mixed-substrate environment is presented. Using only growth and maintenance parameters from single-substrate experiments, the model accurately predicts the simultaneous substrate utilization and maintenance energy effects in constant fed-batch cultures of Klebsiella oxytoca. The robustness of the model was examined more r...

Identification and typing tests Patient isolate S. sonnei ATCC 25931 FE109024 FE109046 Sorbitol fermentation    Glucose fermentation †   Lactose fermentation    -galactosidase production + + + Saccharose fermentation    Mannitol fermentation    Citrate fermentation    Inositol fermentation    Malonate fermention    Arabinose fermentation + + + Xylose fermentation    ...

In this study, Ligustrum lucidum flowers as raw material, the extraction, isolation and coagulatory activity of polysaccharides were carried out for the first time. The crude polysaccharide was obtained by hot water extraction and ethanol precipitation, and preliminarily purified by Sevage method and D101 macroporous resin. Then the polysaccharide was further purified by DEAE-52 cellulose and S...