Growth yields and growth rates of Desulfovibrio vulgaris (Marburg) growing on hydrogen plus sulfate and hydrogen plus thiosulfate as the sole energy sources

1978 ◽  
Vol 117 (2) ◽  
pp. 209-214 ◽  
Author(s):  
Werner Badziong ◽  
Rudolf K. Thauer
Keyword(s):  
Growth Rates ◽  
Growth Yields ◽  
Energy Sources ◽  
Desulfovibrio Vulgaris ◽  
Sole Energy

scholarly journals Growth yields and saturation constant of Desulfovibrio vulgaris in chemostat culture

1984 ◽  
Vol 137 (3) ◽  
pp. 236-240 ◽  
Author(s):  
Regina Nethe-Jaenchen ◽  
Rudolf K. Thauer
Keyword(s):  
Chemostat Culture ◽  
Growth Yields ◽  
Desulfovibrio Vulgaris

scholarly journals Short Fractions of Oligofructose Are Preferentially Metabolized by Bifidobacterium animalis DN-173 010

2004 ◽  
Vol 70 (4) ◽  
pp. 1923-1930 ◽  
Author(s):  
Roel Van der Meulen ◽  
Lazlo Avonts ◽  
Luc De Vuyst
Keyword(s):  
High Performance ◽  
Large Scale ◽  
Fermentation Process ◽  
Sugar Metabolism ◽  
Energy Sources ◽  
Poor Growth ◽  
Chromatography Analysis ◽  
Bifidobacterium Animalis ◽  
Performance Liquid Chromatography Analysis ◽  
Sole Energy

ABSTRACT The growth of Bifidobacterium animalis DN-173 010 on different energy sources was studied through small- and large-scale fermentations. Growth on both more common energy sources (glucose, fructose, galactose, lactose, and sucrose) and inulin-type fructans was examined. High-performance liquid chromatography analysis was used to investigate the kinetics. Gas chromatography was used to determine the fructan degradation during the fermentation process. B. animalis DN-173 010 was unable to grow on a medium containing glucose as the sole energy source. In general, monosaccharides were poor growth substrates for the B. animalis strain. The fermentations with the inulin-type fructans resulted in changes in both growth and metabolite production due to the preferential metabolism of certain fructans, especially the short-chain oligomers. Only after depletion of the shorter chains were the larger fractions also metabolized, although to a lesser extent. Acetic acid was the major metabolite produced during all fermentation experiments. At the beginning of the fermentation, high levels of lactic acid were produced, which were partially replaced by formic acid at later stages. This suggests a shift in sugar metabolism to gain additional ATP that is necessary for growth on oligofructose, which is metabolized more slowly.

scholarly journals Lactobacillus paracasei subsp. paracasei 8700:2 Degrades Inulin-Type Fructans Exhibiting Different Degrees of Polymerization

2005 ◽  
Vol 71 (11) ◽  
pp. 6531-6537 ◽  
Author(s):  
Lefteris Makras ◽  
Gerald Van Acker ◽  
Luc De Vuyst
Keyword(s):  
Energy Source ◽  
Acetic Acid ◽  
Lactic Acid ◽  
Formic Acid ◽  
Lactobacillus Acidophilus ◽  
Human Isolate ◽  
Lactobacillus Paracasei ◽  
Energy Sources ◽  
Long Chain ◽  
Sole Energy

ABSTRACT Ten strains of lactobacilli were assessed for their capacity to degrade inulin-type fructans, which are well-known prebiotics. Both oligofructose and inulin were tested. The dairy isolate Lactobacillus acidophilus IBB 801 degraded only oligofructose. The human isolate Lactobacillus paracasei subsp. paracasei 8700:2 degraded oligofructose and long-chain inulin and grew rapidly on both energy sources. In both cases, fractions of different degrees of polymerization were fermented. Moreover, large and short fractions of oligofructose were degraded simultaneously. When L. paracasei subsp. paracasei 8700:2 grew on oligofructose-enriched inulin, oligofructose was preferentially metabolized. In all cases, lactic acid was the main metabolic end product. Significant amounts of acetic acid, formic acid, and ethanol were produced when long-chain inulin or oligofructose-enriched inulin was used as the sole energy source.

scholarly journals Exploring Fingerprints of the Extreme Thermoacidophile Metallosphaera sedula Grown on Synthetic Martian Regolith Materials as the Sole Energy Sources

2017 ◽  
Vol 8 ◽  
Author(s):  
Denise Kölbl ◽  
Marc Pignitter ◽  
Veronika Somoza ◽  
Mario P. Schimak ◽  
Oliver Strbak ◽  
...  
Keyword(s):  
Energy Sources ◽  
Metallosphaera Sedula ◽  
Martian Regolith ◽  
Sole Energy

scholarly journals Limited accessibility of nitrogen supplied as amino acids, amides, and amines as energy sources for marine Thaumarchaeota

2021 ◽  
Author(s):  
Julian Damashek ◽  
Barbara Bayer ◽  
Gerhard J Herndl ◽  
Natalie J Wallsgrove ◽  
Tamara Allen ◽  
...  
Keyword(s):  
Amino Acids ◽  
Dissolved Organic Nitrogen ◽  
Organic Nitrogen ◽  
Heterotrophic Bacterium ◽  
Field Studies ◽  
Primary Amines ◽  
Energy Sources ◽  
Sterile Seawater ◽  
Axenic Cultures ◽  
Sole Energy

Genomic and physiological evidence from some strains of ammonia-oxidizing Thaumarchaeota demonstrate their additional ability to oxidize nitrogen (N) supplied as urea or cyanate, fueling conjecture about their ability to conserve energy by directly oxidizing reduced N from other dissolved organic nitrogen (DON) compounds. Similarly, field studies have shown rapid oxidation of polyamine-N in the ocean, but it is unclear whether Thaumarchaeota oxidize polyamine-N directly or whether heterotrophic DON remineralization is required. We tested growth of two marine Nitrosopumilus isolates on DON compounds including polyamines, amino acids, primary amines, and amides as their sole energy source. Though axenic cultures only consumed N supplied as ammonium or urea, there was rapid but inconsistent oxidation of N from the polyamine putrescine when cultures included a heterotrophic bacterium. Surprisingly, axenic cultures oxidized 15N-putrescine during growth on ammonia, suggesting co-metabolism or accelerated breakdown of putrescine by reactive metabolic byproducts. Nitric oxide, hydrogen peroxide, or peroxynitrite did not oxidize putrescine in sterile seawater. These data suggest that the N in common DON molecules is not directly accessible to marine Thaumarchaeota, with thaumarchaeal oxidation (and presumably assimilation) of DON-N requiring initial heterotrophic remineralization. However, reactive byproducts or enzymatic co-metabolism may facilitate limited thaumarchaeal DON-N oxidation.

scholarly journals Glycine Betaine as a Direct Substrate for Methanogens (Methanococcoides spp.)

2013 ◽  
Vol 80 (1) ◽  
pp. 289-293 ◽  
Author(s):  
Andrew J. Watkins ◽  
Erwan G. Roussel ◽  
R. John Parkes ◽  
Henrik Sass
Keyword(s):  
Growth Rates ◽  
Glycine Betaine ◽  
Dry Weight ◽  
Growth Yields ◽  
Content Type ◽  
Methyl Group ◽  
Gain Energy ◽  
Type Strains

ABSTRACTNine marine methanogenicMethanococcoidesstrains, including the type strains ofMethanococcoides methylutens,M. burtonii, andM. alaskense, were tested for the utilization ofN-methylated glycines. Three strains (NM1, PM2, and MKM1) used glycine betaine (N,N,N-trimethylglycine) as a substrate for methanogenesis, partially demethylating it toN,N-dimethylglycine, whereas none of the strains usedN,N-dimethylglycine or sarcosine (N-methylglycine). Growth rates and growth yields per mole of substrate with glycine betaine (3.96 g [dry weight] per mol) were similar to those with trimethylamine (4.11 g [dry weight] per mol). However, as glycine betaine is only partially demethylated, the yield per methyl group was significantly higher than with trimethylamine. If glycine betaine and trimethylamine are provided together, trimethylamine is demethylated to dimethyl- and methylamine with limited glycine betaine utilization. After trimethylamine is depleted, dimethylamine and glycine betaine are consumed rapidly, before methylamine. Glycine betaine extends the range of substrates that can be directly utilized by some methanogens, allowing them to gain energy from the substrate without the need for syntrophic partners.

Reduced growth rates of hair in mice following radiation

1966 ◽  
Vol 94 (4) ◽  
pp. 491-498 ◽  
Author(s):  
F. D. Malkinson
Keyword(s):  
Growth Rates
Sign in / Sign up

Export Citation Format

Share Document