| 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) |
| 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) |
| acromial end of clavicle | The flattened lateral end of the clavicle that articulates with the acromion and is anchored to the coracoid process by the conoid and trapezoid ligaments. Synonym: extremitas acromialis claviculae, acromial end of clavicle. (05 Mar 2000) |
| blunt-end | Refers to double-stranded DNA in which there are no unpaired bases at the end. (05 Mar 2000) |
| blunt-end DNA | <molecular biology> A fragment of a DNA molecule in which the ends of both strands are even with each other rather than one strand being longer than the other. (09 Oct 1997) |
| blunt-end ligation | A lab technique to join together two pieces of blunt-end DNA, such as an insert into a cloning vector, which requires the enzyme ligase because there are no single-stranded overhanging ends for the attachment to form more spontaneously, by itself. (09 Oct 1997) |
| by-end | Private end or interest; secret purpose; selfish advantage. Alternative forms: bye-end. (20 Mar 1998) |
| capped 5'-end | A methylated (has a -CH3 attached) guanosine nucleotide attached to the 5'-end (the beginning) of an eukaryotic mRNA, thought to give the mRNA stability. (09 Oct 1997) |