| oxidation pond |
A pond that contains partially treated wastewater which is then left to allow the growth of algae and bacteria which decompose therest of the waste.
(09 Oct 1997) |
| oxidation-reduction |
A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs.
(12 Dec 1998) |
| oxidation-reduction electrode |
An electrode capable of measuring oxidation-reduction potential.
See: quinhydrone electrode.
Synonym: redox electrode.
(05 Mar 2000) |
| oxidation-reduction indicator |
A substance that undergoes a definite colour change at a specific oxidation potential.
Synonym: redox indicator.
(05 Mar 2000) |
| oxidation-reduction potential |
<chemistry, physics> The potential in volts of an inert metallic electrode measured in a system of an arbitrarily chosen ratio of [oxidant] to [reductant] and referred to the normal hydrogen electrode at absolute temperature.
It is calculated from the following equation: where R is the gas constant expressed in electrical units, T the absolute temperature (Kelvin), n the number of electrons transferred, F the faraday and E0 the normal symbol for the potential of the system at pH 0; for biological systems E0' is often used (in which pH = 7).
Compare: Nernst's equation.
Synonym: redox potential.
(05 Mar 2000) |
| oxidation-reduction reaction |
<chemistry> Any reaction in which electrons are removed from one molecule or atom and given to another molecule or atom.
(09 Oct 1997) |
| oxidation-reduction system |
<enzyme> An enzyme system in the tissues by which oxidation and reduction proceed simultaneously through the transference of hydrogen or of one or more electrons from one metabolite to another.
See: oxidation-reduction.
Synonym: redox system.
(05 Mar 2000) |
| terminal oxidation |
<biochemistry> The last oxidation step in a catabolic pathway.
Synonym: terminal oxidation.
(05 Mar 2000) |
| end oxidation |
<biochemistry> The last oxidation step in a catabolic pathway.
Synonym: terminal oxidation.
(05 Mar 2000) |
| fatty acid oxidation cycle |
A series of reactions involving acyl-coenzyme A compounds, whereby these undergo beta oxidation and thioclastic cleavage, with the formation of acetyl-coenzyme A; the major pathway of fatty acid catabolism in living tissue.
(05 Mar 2000) |
| acetyl-CoA:alpha-glucosaminide acetyltransferase |
<enzyme> An enzyme involved in the synthesis of certain carbohydrate moieties on proteins. A deficiency of this enzyme leads to mucopolysaccharidosis type III C.
(05 Mar 2000) |
| adrenergic alpha-agonists |
Drugs that selectively bind to and activate alpha adrenergic receptors.
(12 Dec 1998) |
| adrenergic alpha-antagonists |
Drugs that bind to but do not activate alpha-adrenergic receptors thereby blocking the actions of endogenous or exogenous adrenergic agonists. Adrenergic alpha-antagonists are used in the treatment of hypertension, vasospasm, peripheral vascular disease, shock, and pheochromocytoma.
(12 Dec 1998) |
| alpha |
First letter of the Greek alphabet, a.
(05 Mar 2000) |
| alpha-1,3-mannosylglycoprotein beta-1,4-N-acetylglucosaminyltransferase |
<enzyme> Incorporates n-acetyglucosamine as the third branch of complex n-glycosyl-oligosaccharide of hen oviduct
Registry number: EC 2.4.1.145
Synonym: glcnac-transferase iv, n-acetylglucosaminyltransferase iv, udp-glcnac-gngn(glcnac to man alpha1-3)beta 4-n-acetylglucosaminyltransferase iv
(26 Jun 1999) |
