Search results
Results From The WOW.Com Content Network
Methane monooxygenase belongs to the class of oxidoreductase enzymes (EC 1.14.13.25). There are two forms of MMO: the well-studied soluble form (sMMO) and the particulate form (pMMO). [2] The active site in sMMO contains a di-iron center bridged by an oxygen atom (Fe-O-Fe), whereas the active site in pMMO utilizes copper.
Some specific methanotrophs can reduce nitrate, [19] nitrite, [20] iron, [21] sulfate, [22] or manganese ions and couple that to methane oxidation without syntrophic partner. Investigations in marine environments revealed that methane can be oxidized anaerobically by consortia of methane oxidizing archaea and sulfate-reducing bacteria.
Methanobactin (mb) is a class of copper-binding and reducing chromophoric peptides initially identified in the methanotroph Methylococcus capsulatus Bath - and later in Methylosinus trichosporium OB3b - during the isolation of the membrane-associated or particulate methane monooxygenase (pMMO). [1]
The overall reactions are: CH 4 + 4 NO 3 − → CO 2 + 4 NO 2 − + 2 H 2 O 3 CH 4 + 8 NO 2 − + 8 H + → 3 CO 2 + 4 N 2 + 10 H 2 O. ANME-2d is shown to be responsible nitrate-driven AOM. [5] The ANME-2d, named Methanoperedens nitroreducens, is able to perform nitrate-driven AOM without a partner organism via reverse methanogenesis with nitrate as the terminal electron acceptor, using genes ...
Venenivibrio stagnispumantis gains energy by oxidizing hydrogen gas.. In biochemistry, chemosynthesis is the biological conversion of one or more carbon-containing molecules (usually carbon dioxide or methane) and nutrients into organic matter using the oxidation of inorganic compounds (e.g., hydrogen gas, hydrogen sulfide) or ferrous ions as a source of energy, rather than sunlight, as in ...
Some organisms can oxidize methane, functionally reversing the process of methanogenesis, also referred to as the anaerobic oxidation of methane (AOM). Organisms performing AOM have been found in multiple marine and freshwater environments including methane seeps, hydrothermal vents, coastal sediments and sulfate-methane transition zones. [8]
Organic redox reactions: the Birch reduction. Organic reductions or organic oxidations or organic redox reactions are redox reactions that take place with organic compounds.In organic chemistry oxidations and reductions are different from ordinary redox reactions, because many reactions carry the name but do not actually involve electron transfer. [1]
Oxidation of an alkene with osmium tetroxide (0.06 eq.) and NMO (1.2 eq.)in acetone/water 5:1 RT 12 hrs. [6] NMO, as an N-oxide, is an oxidant in the Upjohn dihydroxylation. It is generally used in stoichiometric amounts as a secondary oxidant (a cooxidant) to regenerate a primary (catalytic) oxidant after the latter has been reduced by the ...