Results 71 to 80 of about 16,954 (214)

Effect of ammonium concentration on methane oxidation and CO2 removal in an anaerobic biotrickling filter treating synthetic landfill gas and leachate

open access: yesJournal of Chemical Technology &Biotechnology, EarlyView.
Abstract BACKGROUND Landfill gas (LFG) and leachate are commonly treated separately through energy‐intensive processes. This study evaluated the integration of both streams in an anaerobic biotrickling filter (BTF) to achieve simultaneous methane (CH4) and carbon dioxide (CO2) removal coupled with ammonium (NH4+) transformation, and how the microbial ...
Cecilia Lizeth Alvarez‐Guzmán   +3 more
wiley   +1 more source

Generation of a transmembrane gradient of Na+ in Methanosarcina barkeri [PDF]

open access: yesEuropean Journal of Biochemistry, 1987
A transmembrane Na+ gradient was generated by Methanosarcina barkeri during methanogenesis. The intracellular Na+ concentration amounted to approximately one fifth of the extracellular one. A secondary Na+/H+ antiport system was shown to be responsible for Na+ extrusion. This system could be inhibited by amiloride.
V, Müller, M, Blaut, G, Gottschalk
openaire   +2 more sources

Co-occurrence of Methanosarcina mazei and Geobacteraceae in an iron(III)-reducing enrichment culture

open access: yesFrontiers in Microbiology, 2015
Methanosaeta harundinacea and Methanosarcina barkeri, known as classic acetoclastic methanogens, are capable of directly accepting electrons from Geobacter metallireducens for the reduction of carbon dioxide to methane, having been revealed as direct ...
Shiling eZheng   +8 more
doaj   +1 more source

High-rate, High Temperature Acetotrophic Methanogenesis Governed by a Three Population Consortium in Anaerobic Bioreactors. [PDF]

open access: yesPLoS ONE, 2016
A combination of acetate oxidation and acetoclastic methanogenesis has been previously identified to enable high-rate methanogenesis at high temperatures (55 to 65°C), but this capability had not been linked to any key organisms.
Dang Ho   +5 more
doaj   +1 more source

Enhancement of bioconversion of coal to methane by graphene

open access: yesMeitan xuebao, 2023
The research of enhancing biomethanation of coal has been paid much attention, which is an effective measure for increasing coalbed methane production.
Yixuan ZHOU   +5 more
doaj   +1 more source

Satellites in the prokaryote world [PDF]

open access: yes, 2019
Background Satellites or tandem repeats are very abundant in many eukaryotic genomes. Occasionally they have been reported to be present in some prokaryotes, but to our knowledge there is no general comparative study on their occurrence.
Messeguer Peypoch, Xavier   +1 more
core   +2 more sources

Deciphering the properties and reaction mechanism of anhydromevalonate phosphate decarboxylase, a prenylated flavin mononucleotide‐dependent enzyme in the archaeal mevalonate pathway

open access: yesThe FEBS Journal, EarlyView.
Characterization of anhydromevalonate phosphate decarboxylase, the UbiD‐family decarboxylase involved in the archaeal mevalonate pathway, was conducted. The enzyme is responsible for the biosynthesis of isoprenoids, such as archaeal membrane lipids, respiratory quinones, and dolichols.
Rino Ishikawa   +9 more
wiley   +1 more source

A Proteasome from the Methanogenic Archaeon Methanosarcina thermophila [PDF]

open access: yesJournal of Biological Chemistry, 1995
A 645-kDa proteasome was purified from Methanosarcina thermophila which had chymotrypsin-like and peptidylglutamyl-peptide hydrolase activities and contained alpha (24-kDa) and beta (22-kDa) subunits. Processing of both subunits was suggested by comparison of N-terminal sequences with the sequences deduced from the alpha- and beta-encoding genes (psmA ...
J A, Maupin-Furlow, J G, Ferry
openaire   +2 more sources

Time-shifted expression of acetoclastic and methylotrophic methanogenesis by a single Methanosarcina genomospecies predominates the methanogen dynamics in Philippine rice field soil

open access: yesMicrobiome
Background The final step in the anaerobic decomposition of biopolymers is methanogenesis. Rice field soils are a major anthropogenic source of methane, with straw commonly used as a fertilizer in rice farming.
Xin Li   +4 more
doaj   +1 more source

H2‐dependent modulation of tetrahydromethanopterin S‐methyltransferase (Mtr complex) activity by the small protein MtrR in Methanosarcina mazei

open access: yesThe FEBS Journal, EarlyView.
Small protein MtrR is a regulator of the Mtr methyltransferase complex in Methanosarcina mazei. It binds specifically to the MtrA subunit and modulates Mtr activity in response to hydrogen (H2) availability. Deleting mtrR impairs growth in the presence but not absence of H2, indicating its role in directing methyl transfer toward an energy‐conserving ...
Tim Habenicht   +6 more
wiley   +1 more source

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