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Humin Assists Reductive Acetogenesis in Absence of Other External Electron Donor [PDF]
International Journal of Environmental Research and Public Health, 2020 The utilization of extracellular electron transfer by microorganism is highly engaging for remediation of toxic pollutants under “energy-starved” conditions. Humin, an organo-mineral complex of soil, has been instrumental as an external electron mediator for suitable electron donors in the remediative works of reductive dehalogenation, denitrification,
Arata Katayama +2 more
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The effect of pharmaceuticals on the kinetics of methanogenesis and acetogenesis
Bioresource Technology, 2008In this study, the widely used anaerobic digestion model (ADM1) was used in order to simulate the inhibition of three pharmaceuticals, propranolol hydrochloride, ofloxacin and diclofenac sodium, on two groups of microorganisms, acetogens and acetoclastic methanogens, the most sensitive microorganisms groups involved in the anaerobic digestion process ...
M S, Fountoulakis +2 more
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Carbon isotope effects associated with autotrophic acetogenesis
Organic Geochemistry, 1989The carbon kinetic isotope effects associated with synthesis of acetate from CO2 and H2 during autotrophic growth of Acetobacterium woodii at 30 degrees C have been measured by isotopic analyses of CO2, methyl-carbon, and total acetate. Closed systems allowing construction of complete mass balances at varying stages of growth were utilized, and the ...
J T, Gelwicks, J B, Risatti, J M, Hayes
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Acetogenesis as an alternative to methanogenesis in the rumen.
2015Abstract Bacteria capable of producing acetate from H2 and CO2 using the acetyl-CoA pathway (4H2+2CO2 → CH3COOH+2H2O) are known as acetogens. They have been found in a variety of anaerobic ecosystems, including sediments, wastewater treatment systems, soils and animal gut systems.
Gagen, Emma J. +2 more
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Acetogenesis at Low Temperature
1994Most habitats on earth have a low average annual temperature, and more than 80% of the biosphere is permanently cold. In general, the study of mesophilic processes have dominated the interests of biologists. However, though poorly characterized, microbial processes in cold climatic zones may play important roles in the biological cycles and global ...
Alla N. Nozhevnikova +2 more
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Acetogenesis and the Rumen: Syntrophic Relationships
1994Acetate can be formed, as a major or minor product, from the fermentation of various organic substrates. It is also formed by a synthesis from CO2 and/or other one-carbon precursors. Acetogenic bacteria can be defined as obligate anaerobes that utilize CO2 as a terminal electron acceptor in energy metabolism, producing acetate and other fatty acids ...
Roderick I. Mackie, Marvin P. Bryant
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Acetogenesis: Reality in the Laboratory, Uncertainty Elsewhere
1994This chapter focuses on recent work in our research group that further extends our awareness of the diverse metabolic potentials of acetogens and, consequently, broadens our uncertainty in making accurate predictions of the role acetogens actually play at the ecosystem level (i.e., “elsewhere” per the title of this chapter).
Harold L. Drake +3 more
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Acetogenesis coupled to the oxidation of aromatic aldehyde groups
Archives of Microbiology, 1994Vanillin cultures of Clostridium formicoaceticum produced higher cell densities than did vanillate cultures. During growth at the expense of vanillin, vanillate was the predominat intermediate formed; 3,4-dihydroxybenzaldehyde was not a significantly detectable intermediate.
Anita G��ner +2 more
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Energetics of Acetogenesis from C1 Units
1994Homoacetogenic bacteria (also called “acetogenic bacteria”) are strictly anaerobic eubacteria, which catalyze the synthesis of acetate from C1 units in their catabolism. The homoacetogens have proved to be a very heterogenous group of microorganisms: they are gram positive as well as gram negative, spore- or non-spore forming, thermophilic and ...
Gabriele Diekert, Gert Wohlfarth
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Physioecologic and Metabolic Properties of a Ayntrophic Acetogenesis Coculture
Advanced Materials Research, 2013In anaerobic digestion system, the functional niche of hydrogen-producing acetogens (HPAs) is between acidogenic fermentation bacteria and methanogens. HPAs are quite difficult to be isolated by pure and ampliative cultures due to the obligate anaerobic metabolism property in syntrophic association with methanogenic.
Tao Jiang +3 more
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