Hydrogen Sulfide

Hydrogen sulfide (British English: hydrogen sulphide) is the chemical compound with the formula H2S. It is a colorless, very poisonous, flammable gas with the characteristic foul odor of rotten eggs. It often results from the bacterial breakdown of organic matter in the absence of oxygen, such as in swamps and sewers; this process is commonly known as anaerobic digestion. It also occurs in volcanic gases, natural gas, and some well waters. The human body produces small amounts of H2S and uses it as a signaling molecule.

Read more about Hydrogen Sulfide:  Properties, Production, Occurrence, Removal From Fuel Gases, Safety, Function in The Body, Induced Hypothermia and Suspended Animation, Participant in The Sulfur Cycle, Mass Extinctions

Other articles related to "hydrogen sulfide, hydrogen":

Sulfur Metabolism - Sulfur Oxidation
... Reduced sulfur compounds, such as hydrogen sulfide, elemental sulfur, sulfite, thiosulfate, and various polythionates (e.g ... around hydrothermal vents, which emit hydrogen sulfide and carbon dioxide ... Chemosynthetic archaea use hydrogen sulfide as an energy source for carbon fixation, producing sugars ...
Sulfur Oxygenase/reductase
... an enzyme that catalyzes the chemical reaction 4 sulfur + 4 H2O + O2 2 hydrogen sulfide + 2 bisulfite + 2 H+ The 3 substrates of this enzyme are sulfur, H2O, and O2, whereas its 3 products are hydrogen sulfide ... The systematic name of this enzyme class is sulfuroxygen oxidoreductase (hydrogen-sulfide- and sulfite-forming) ...
L-3-cyanoalanine Synthase
... synthase (EC is an enzyme that catalyzes the chemical reaction L-cysteine + hydrogen cyanide L-3-cyanoalanine + hydrogen sulfide Thus, the two substrates of this enzyme are L-cys ... name of this enzyme class is L-cysteine hydrogen-sulfide-lyase (adding hydrogen cyanide L-3-cyanoalanine-forming) ... synthase, and L-cysteine hydrogen-sulfide-lyase (adding HCN) ...
Atmosphere Of Uranus - Structure - Troposphere
... in the range of 20 and 40 bar, ammonia or hydrogen sulfide clouds at between 3 and 10 bar and finally thin methane clouds at 1 to 2 bar ... The existence of a hydrogen sulfide cloud layer is only possible if the ratio of sulfur and nitrogen abundances (S/N ratio) is significantly greater ... Otherwise all hydrogen sulfide would react with ammonia, producing ammonium hydrosulfide, and the ammonia clouds would appear instead in the pressure range 3–10 bar ...
Hydrogen Sulfide - Mass Extinctions
... Hydrogen sulfide has been implicated in several mass extinctions that have occurred in the Earth's past ... In particular, a buildup of hydrogen sulfide in the atmosphere may have caused the Permian-Triassic extinction event 252 million years ago ... The increased levels of hydrogen sulfide could have killed oxygen-generating plants as well as depleted the ozone layer, causing further stress ...

Famous quotes containing the word hydrogen:

    The pace of science forces the pace of technique. Theoretical physics forces atomic energy on us; the successful production of the fission bomb forces upon us the manufacture of the hydrogen bomb. We do not choose our problems, we do not choose our products; we are pushed, we are forced—by what? By a system which has no purpose and goal transcending it, and which makes man its appendix.
    Erich Fromm (1900–1980)