Results 21 to 30 of about 11,269 (227)

METHANOGEN METABOLIC FLEXIBILITY [PDF]

open access: yes, 2022
Methanogens are obligately anaerobic archaea which produce methane as a byproduct of their respiration. They are found across a wide diversity of environments and play an important role in cycling carbon in anaerobic spaces and the removal of harmful ...
Carr, Sean, Carr, Sean R
core  

Progress in the development of vaccines against rumen methanogens

open access: yesAnimal, 2013
Vaccination against rumen methanogens offers a practical approach to reduce methane emissions in livestock, particularly ruminants grazing on pasture. Although successful vaccination strategies have been reported for reducing the activity of the rumen ...
D.N Wedlock   +4 more
doaj   +1 more source

Response of methanogenic community and their activity to temperature rise in alpine swamp meadow at different water level of the permafrost wetland on Qinghai-Tibet Plateau

open access: yesFrontiers in Microbiology, 2023
Wetlands are an important source of atmospheric methane (CH4) and are sensitive to global climate change. Alpine swamp meadows, accounting for ~50% of the natural wetlands on the Qinghai-Tibet Plateau, were considered one of the most important ecosystems.
Hongpeng Cui   +20 more
doaj   +1 more source

Nitrate decreases ruminal methane production with slight changes to ruminal methanogen composition of nitrate-adapted steers

open access: yesBMC Microbiology, 2018
Background This study was conducted to examine effects of nitrate on ruminal methane production, methanogen abundance, and composition. Six rumen-fistulated Limousin×Jinnan steers were fed diets supplemented with either 0% (0NR), 1% (1NR), or 2% (2NR ...
Liping Zhao   +6 more
doaj   +1 more source

Fecal Methanogens and Vertebrate Evolution [PDF]

open access: yesEvolution, 1996
It has been assumed that the feeding habits of vertebrates predispose the variety of intestinal differentiations and the composition of the microbial biota living in their intestinal tracts. Consequently, the presence of methanogenic bacteria in the various differentiations of the large intestine and the foregut of herbivorous vertebrates had been ...
Hackstein, J.H.P., Alen, T.A. van
openaire   +3 more sources

Organic matter supply and bacterial community composition predict methanogenesis rates in temperate lake sediments

open access: yesLimnology and Oceanography Letters, 2019
The objective of our study was to identify environmental conditions that structure lake sediment microbial communities and determine whether community composition explained inter‐lake variation in potential methanogenesis rates.
Brittni L. Bertolet   +3 more
doaj   +1 more source

Structures of topoisomerase V in complex with DNA reveal unusual DNA-binding mode and novel relaxation mechanism

open access: yeseLife, 2022
Topoisomerase V is a unique topoisomerase that combines DNA repair and topoisomerase activities. The enzyme has an unusual arrangement, with a small topoisomerase domain followed by 12 tandem (HhH)2 domains, which include 3 AP lyase repair domains.
Amy Osterman, Alfonso Mondragón
doaj   +1 more source

Effect of ammonium and acetate on methanogenic pathway and methanogenic community composition [PDF]

open access: yesFEMS Microbiology Ecology, 2012
Methanogenesis from acetate (aceticlastic methanogenesis or syntrophic acetate oxidation (SAO) coupled with hydrogenotrophic methanogenesis) is the most important step for the biogas process. The major environmental factors influencing methanogenesis are volatile fatty acids, ammonia, pH, and temperature. In our study, the effect of acetate and ammonia
Ioannis A, Fotidis   +4 more
openaire   +2 more sources

Isoprene Production from Municipal Wastewater Biosolids by Engineered Archaeon Methanosarcina acetivorans

open access: yesApplied Sciences, 2021
Wastewater biosolids are a promising feedstock for production of value-added renewable chemicals. Methane-producing archaea (methanogens) are already used to produce renewable biogas via the anaerobic treatment of wastewater.
Sean Carr   +2 more
doaj   +1 more source

Evidence for a plasmid in a methanogenic bacterium [PDF]

open access: yesJournal of Bacteriology, 1983
Among 15 strains of methanogens, one plasmid, pMP1, was identified in the new coccoid isolate PL-12/M. It could not be detected in the cleared lysate, but it was detected in the viscous pellet. The plasmid had a molecular weight of ca. 4.6 x 10(6). A restriction enzyme cleavage map of the cloned plasmid was derived.
M, Thomm, J, Altenbuchner, K O, Stetter
openaire   +2 more sources

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