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":

Atmosphere Of Uranus - Structure - Troposphere
... bar, ammonium hydrosulfide clouds 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 than its solar value of 0.16 ... 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 ...
Sulfur Metabolism - Sulfur Oxidation
... Reduced sulfur compounds, such as hydrogen sulfide, elemental sulfur, sulfite, thiosulfate, and various polythionates (e.g ... Food chains have formed in the absence of sunlight 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
... 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 ... this enzyme class is sulfuroxygen oxidoreductase (hydrogen-sulfide- and sulfite-forming) ...
L-3-cyanoalanine Synthase
... catalyzes the chemical reaction L-cysteine + hydrogen cyanide L-3-cyanoalanine + hydrogen sulfide Thus, the two substrates of this enzyme are L-cysteine ... The systematic name of this enzyme class is L-cysteine hydrogen-sulfide-lyase (adding hydrogen cyanide L-3-cyanoalanine-forming) ... synthase, beta-cyanoalanine synthetase, beta-cyano-L-alanine synthase, and L-cysteine hydrogen-sulfide-lyase (adding HCN) ...

Famous quotes containing the word hydrogen:

    All you of Earth are idiots!... First was your firecracker, a harmless explosive. Then your hand grenade. They begin to kill your own people a few at a time. Then the bomb. Then a larger bomb, many people are killed at one time. Then your scientists stumbled upon the atom bomb—split the atom. Then the hydrogen bomb, where you actually explode the air itself.
    Edward D. Wood, Jr. (1922–1978)