scholarly journals Simultaneous Oxidation of Atmospheric Methane, Carbon Monoxide and Hydrogen for Bacterial Growth

2021 ◽  
Vol 9 (1) ◽  
pp. 153
Author(s):  
Alexander Tøsdal Tveit ◽  
Tilman Schmider ◽  
Anne Grethe Hestnes ◽  
Matteus Lindgren ◽  
Alena Didriksen ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Low Energy ◽  
Metabolic Flexibility ◽  
Atmospheric Methane ◽  
Oxidation Of Co ◽  
Ch4 Oxidation ◽  
Methane Oxidizing Bacteria ◽  
Simultaneous Oxidation ◽  
Methane Oxidizer ◽  
Methane Carbon

The second largest sink for atmospheric methane (CH4) is atmospheric methane oxidizing-bacteria (atmMOB). How atmMOB are able to sustain life on the low CH4 concentrations in air is unknown. Here, we show that during growth, with air as its only source for energy and carbon, the recently isolated atmospheric methane-oxidizer Methylocapsa gorgona MG08 (USCα) oxidizes three atmospheric energy sources: CH4, carbon monoxide (CO), and hydrogen (H2) to support growth. The cell-specific CH4 oxidation rate of M. gorgona MG08 was estimated at ~0.7 × 10−18 mol cell−1 h−1, which, together with the oxidation of CO and H2, supplies 0.38 kJ Cmol−1 h−1 during growth in air. This is seven times lower than previously assumed necessary to support bacterial maintenance. We conclude that atmospheric methane-oxidation is supported by a metabolic flexibility that enables the simultaneous harvest of CH4, H2 and CO from air, but the key characteristic of atmospheric CH4 oxidizing bacteria might be very low energy requirements.

Thermodynamic Properties of the System Methane‐Carbon Monoxide at 90.67°K

1955 ◽  
Vol 23 (8) ◽  
pp. 1551-1551 ◽  
Author(s):  
V. Mathot ◽  
L. A. K. Staveley ◽  
J. A. Young ◽  
N. G. Parsonage
Keyword(s):  
Carbon Monoxide ◽  
Thermodynamic Properties ◽  
Methane Carbon

RUMEN GAS ANALYSIS BY GAS-SOLID CHROMATOGRAPHY

1961 ◽  
Vol 41 (2) ◽  
pp. 187-196 ◽  
Author(s):  
J. M. McArthur ◽  
J. E. Miltimore
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Hydrogen Sulphide ◽  
Sample Volume ◽  
Gas Analysis ◽  
Complete Analysis ◽  
Thermal Detector ◽  
Thermal Detection ◽  
Methane Carbon

Methods are described for sampling and analysing rumen gases. The analysis requires less than 15 minutes for the determination of hydrogen, oxygen, nitrogen, methane, carbon monoxide, carbon dioxide, and hydrogen sulphide, i.e., for all gases occurring in the rumen. The method is sensitive and requires only a small quantity of sample, and the sample volume need not be known. The presence of water or other vapours in the sample does not influence the results. Relative thermal detector responses have been determined for gases which occur in the rumen. These eliminate the necessity for the calibration of gas chromatographs using thermal detection. The first complete analysis of rumen gas is presented.

scholarly journals Energy Conservation Model Based on Genomic and Experimental Analyses of a Carbon Monoxide-Utilizing, Butyrate-Forming Acetogen, Eubacterium limosum KIST612

2015 ◽  
Vol 81 (14) ◽  
pp. 4782-4790 ◽  
Author(s):  
Jiyeong Jeong ◽  
Johannes Bertsch ◽  
Verena Hess ◽  
Sunju Choi ◽  
In-Geol Choi ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Atp Synthesis ◽  
Binding Motif ◽  
Oxidation Of Co ◽  
Co Dehydrogenase ◽  
Content Type ◽  
A Genome ◽  
Eubacterium Limosum ◽  
The One ◽  
Conservation Model

ABSTRACTEubacterium limosumKIST612 is one of the few acetogens that can produce butyrate from carbon monoxide. We have used a genome-guided analysis to delineate the path of butyrate formation, the enzymes involved, and the potential coupling to ATP synthesis. Oxidation of CO is catalyzed by the acetyl-coenzyme A (CoA) synthase/CO dehydrogenase and coupled to the reduction of ferredoxin. Oxidation of reduced ferredoxin is catalyzed by the Rnf complex and Na+dependent. Consistent with the finding of a Na+-dependent Rnf complex is the presence of a conserved Na+-binding motif in thecsubunit of the ATP synthase. Butyrate formation is from acetyl-CoA via acetoacetyl-CoA, hydroxybutyryl-CoA, crotonyl-CoA, and butyryl-CoA and is consistent with the finding of a gene cluster that encodes the enzymes for this pathway. The activity of the butyryl-CoA dehydrogenase was demonstrated. Reduction of crotonyl-CoA to butyryl-CoA with NADH as the reductant was coupled to reduction of ferredoxin. We postulate that the butyryl-CoA dehydrogenase uses flavin-based electron bifurcation to reduce ferredoxin, which is consistent with the finding ofetfAandetfBgenes next to it. The overall ATP yield was calculated and is significantly higher than the one obtained with H2+ CO2. The energetic benefit may be one reason that butyrate is formed only from CO but not from H2+ CO2.

scholarly journals Co3O4 morphology in the preferential oxidation of CO

2017 ◽  
Vol 7 (20) ◽  
pp. 4806-4817 ◽  
Author(s):  
Motlokoa Khasu ◽  
Thulani Nyathi ◽  
David J. Morgan ◽  
Graham J. Hutchings ◽  
Michael Claeys ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Preferential Oxidation ◽  
Oxidation Of Co ◽  
Preferential Oxidation Of Co

Different morphologies of Co3O4 were synthesized and tested for their performance in the preferential oxidation (PrOx) of carbon monoxide to investigate the effect of preferentially exposed crystal planes.

Methane, Carbon Monoxide and Methylchloroform in the Southern Hemisphere

1986 ◽  
pp. 201-240
Author(s):  
P. J. Fraser ◽  
P. Hyson ◽  
R. A. Rasmussen ◽  
A. J. Crawford ◽  
M. A. K. Khalil
Keyword(s):  
Carbon Monoxide ◽  
Southern Hemisphere ◽  
Methane Carbon

Diurnal variability of atmospheric methane, nonmethane hydrocarbons, and carbon monoxide at Mauna Loa

1992 ◽  
Vol 97 (D10) ◽  
pp. 10395 ◽  
Author(s):  
J. P. Greenberg ◽  
P. R. Zimmerman ◽  
W. F. Pollock ◽  
R. A. Lueb ◽  
L. E. Heidt
Keyword(s):  
Carbon Monoxide ◽  
Nonmethane Hydrocarbons ◽  
Atmospheric Methane ◽  
Diurnal Variability ◽  
Mauna Loa

LEEM and MEM Studies of Spatiotemporal Pattern Formation

1998 ◽  
Vol 05 (06) ◽  
pp. 1233-1239 ◽  
Author(s):  
K. C. Rose ◽  
W. Engel ◽  
F. Meißen ◽  
A. J. Patchett ◽  
A. M. Bradshaw ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Pattern Formation ◽  
Reaction Diffusion ◽  
Low Energy ◽  
Spatiotemporal Pattern ◽  
Oxidation Of Co ◽  
Spatiotemporal Pattern Formation ◽  
Low Energy Electron ◽  
Stationary Conditions ◽  
Global Coupling

Spatiotemporal pattern formation has been investigated with low energy electron microscopy (LEEM) and mirror electron microscopy (MEM) during the catalytic oxidation of CO on Pt{110} under both oscillatory and stationary conditions. Due to higher resolution and richer contrast than in previous PEEM studies, it has been possible to investigate the details of the nucleation and propagation of reaction–diffusion fronts which make up the patterns, Further, new and more complex patterns have been discovered which demonstrate the importance of both global coupling and reaction-induced roughening.

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