Results 161 to 170 of about 3,891 (199)

Attempts to Induce Reductive Acetogenesis Into a Sheep Rumen

Archives of Animal Nutrition, 1996
A rumen fistulated wether was used for continuous infusion of a 2-bromoethanesulfonic acid (BES) solution (2 g/d in 50 ml of water). The infusion was started after introduction of a pulse dose of BES (2 g) into the rumen. Immediately after introduction of the pulse dose, methane concentration in rumen gases was lowered from about 40 to less than 1 ...
D Demeyer, L Mbanzamihigo
exaly   +3 more sources

The Effect of Pharmaceuticals on the Kinetics of Methanogenesis and Acetogenesis

Bioresource Technology, 2008
In 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 ...
Katerina Stamatelatou, Gerasimos Lyberatos   +1 more
exaly   +3 more sources

“Hot” acetogenesis

Extremophiles, 2016
Thermophilic microorganisms as well as acetogenic bacteria are both considered ancient. Interestingly, only a few species of bacteria, all belonging to the family Thermoanaerobacteraceae, are described to conserve energy from acetate formation with hydrogen as electron donor and carbon dioxide as electron acceptor.
Mirko, Basen, Volker, Müller
openaire   +2 more sources

Kinetics of Syntrophic Acetogenesis in a Saline Medium

Journal of Chemical Technology and Biotechnology, 2008
AbstractBACKGROUND: The anaerobic degradation kinetics of volatile fatty acids (VFA) in a saline (24 g NaCl dm−3) and mesophilic (37 °C) medium was studied under batch test conditions. The acetate production kinetics without inhibition by propionic, butyric and valeric acids was determined.
Marlene Roeckel, Estrella Aspe, César Huiliñir   +2 more
exaly   +6 more sources

Carbon isotope effects associated with autotrophic acetogenesis

Organic Geochemistry, 1989
The 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
openaire   +2 more sources

Acetogenesis as an alternative to methanogenesis in the rumen.

2015
Abstract 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., Denman, Stuart E., McSweeney, Christopher S.   +2 more
openaire   +3 more sources

Acetogenesis at Low Temperature

1994
Most 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, Oleg R. Kotsyurbenko, Marija V. Simankova   +2 more
openaire   +1 more source

Acetogenesis and the Rumen: Syntrophic Relationships

1994
Acetate 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
openaire   +1 more source

Acetogenesis: Reality in the Laboratory, Uncertainty Elsewhere

1994
This 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, Steven L. Daniel, Carola Matthies, Kirsten Küsel   +3 more
openaire   +1 more source

Acetogenesis coupled to the oxidation of aromatic aldehyde groups

Archives of Microbiology, 1994
Vanillin 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, Steven L. Daniel, Harold L. Drake   +2 more
openaire   +1 more source