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Formation of sorbitol by Zymomonas mobilis
Applied Microbiology and Biotechnology, 1984Sorbitol is formed as the major by-product in ethanol fermentations by Zymomonas mobilis when both glucose and fructose are present in the fermentation medium. The amount of sorbitol produced was equivalent to as much as 11% of the original carbon source, decreasing the ethanol yield correspondingly.
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Stability of levan produced by Zymomonas mobilis
Process Biochemistry, 2005Abstract The stability of levan produced by Zymomonas mobilis 113 “S” was investigated during storage of culture liquid at different pH and temperatures. Levan was not degraded if stored in a culture liquid for 120 h at 30 or 25 °C, but at 55 or 60 °C the degree of degradation was inversely proportional to pH.
R. Linde +6 more
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Cosmeceutical properties of levan produced by Zymomonas mobilis
International Journal of Cosmetic Science, 2006Levan, a polysaccharide that can be produced by both plants and micro‐organisms, is a sugar polymer composed of fructose, with‐2,6 linkages. Here, we have attempted to assess the possible use of levan produced by Zymomonas mobilis as a cosmeceutical ingredient.
Young Heui Kim +5 more
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Metabolic Analysis of Zymomonas mobilis [PDF]
, 2000 Zymomonas Mobilis is an anaerobic, Gram-negative bacterium producing ethanol from glucose via the Entner-Doudoroff (2-keto-3-deoxy-6-phosphogluconate, KDPG) pathway in conjunction with the enzymes pyruvate decarboxylase and alcohol dehydrogenase. The organism was originally isolated from fermenting sugar-rich plant saps, e.g., in the mexican pulque ...
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Hydrogen peroxide production by Zymomonas mobilis
Applied Microbiology and Biotechnology, 1989The anaerobic aerotolerant bacterium Zymomonas mobilis 113 produced superoxide (O2-) and hydrogen peroxide (H2O2) under aerobic conditions. The main generators of H2O2 were glucose oxidase and superoxide dismutase (SOD). The O2-generation was probably related to minor alternative reduced nicotinamide adenine zinucleotide (NADH)-oxidation reactions in ...
Lolita M. Pankova +3 more
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Zymomonas mobilis—Towards Bacterial Biofuel
2017Bioconversion of lignocellulosic hydrolysates to ethanol is a promising solution to energy from renewable non-food sources. While utilisation of all sugars in these hydrolysates by Zymomonas mobilis has been facilitated through genetic modification of this organism, and molecular biology and fermenting capabilities of xylose-utilising Z.
Linda H. Callanan +3 more
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Effect of oxygen on the metabolism of Zymomonas mobilis
Archives of Microbiology, 1984The specific growth rate of the ethanol producing bacterium Zymomonas mobilis was 25–40% lower in the presence of oxygen than under anaerobic conditions, provided the cultures were supplied with a low substrate concentration (20 g glucose/l). However, the molar growth yield of these cultures was not influenced by oxygen.
Stephanie Bringer +2 more
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Construction of a shuttle vector for Zymomonas mobilis
Applied Microbiology and Biotechnology, 1989An Escherichia coli-Zymomonas mobilis shuttle vector was constructed from a 15.5 kb native plasmid of ZM6 00 and the E. coli plasmid, pBR329. Integrative transfer of this shuttle vector from E. coli to Z. mobilis was achieved with the aid of the mobilizing plasmid, pRK2013. The shuttle vector was stable in Z.
Peter L. Rogers +2 more
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Genetic Alteration of Zymomonas Mobilis for Ethanol Production
1982Recent interest in ethanol as a potential fuel or fuel supplement has stimulated research into various aspects of the fermentation process. Techniques such as continuous fermentation, vacuum distillation and methods for cell recycle have been investigated (6,10,11), but another important area being studied is that of strain selection and improvement ...
Peter L. Rogers +3 more
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Physiology of Zymomonas mobilis: Some Unanswered Questions
2006The ethanol-producing bacterium Zymomonas mobilis can serve as a model organism for the study of rapid catabolism and inefficient energy conversion in bacteria. Some basic aspects of its physiology still remain poorly understood. Here, the energy-spilling pathways during uncoupled growth, the structure and function of electron transport chain, and the ...
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