| s | Greek lower case letter sigma; conductivity; cross section; millisecond; molecular type or bond; pop... |
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| VB | vaginal bulb; valence bond; venous blood; ventrobasal; Veronal buffer; vertebrobasilar; viable birth... |
| H-bond | hydrogen bond |
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| HCA | Hydrophobic Cluster Analysis |
| HIC | Hydrophobic Interaction Chromatography |
| HGMF | hydrophobic grid membrane filter |
| SH | small hydrophobic |
| hydrophobic bond | See: hydrophobic interaction. (05 Mar 2000) |
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| hydrophobic bonding | <chemistry> Interaction driven by the exclusion of nonpolar residues from water. It is an important determinant of protein conformation and of lipid structures and is considered to be a consequence of maximising polar interactions rather than a positive interaction between apolar residues. (18 Nov 1997) |
| hydrophobic | <chemistry> Not readily absorbing water or being adversely affected by water, as a hydrophobic colloid. (18 Nov 1997) |
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| hydrophobic colloid | A colloidal solution in which the disperse particles are solid and lyophobe or hydrophobe, and are therefore sharply demarcated from the fluid in which they are suspended. Synonym: hydrophobic colloid, lyophobic colloid, suspension colloid. Origin: suspension + G. Eidos, resemblance (05 Mar 2000) |
| hydrophobic effect | <chemistry> The tendency for the nonpolar portions of a group of lipid molecules to clump together with one another and exclude water and other polar molecules. The polar portions of the lipid molecules end up facing out. The hydrophobic effect is primarily responsible for the construction of lipid bilayers. (09 Oct 1997) |
| hydrophobic interaction | <chemistry> The attractive force between molecules due to the close positioning of non-hydrophilic portions of the two molecules. (09 Oct 1997) |
| hydrophobic tetanus | A type of local tetanus that follows wounds to the face and head; after a brief incubation (1-2 days) the facial and ocular muscles become paretic yet undergo repeated tetanic spasms. The throat and tongue muscles may also be affected. Synonym: cerebral tetanus, head tetanus, hydrophobic tetanus, rose cephalic tetanus, Rose's cephalic tetanus. (05 Mar 2000) |
| acylmercaptan bond | A high energy bond formed by the condensation of a carboxyl group (-COOH) and a mercaptan (or thiol) group (-SH); widely formed in the course of intermediary metabolism, notably in the oxidation of fats, where the -SH is part of coenzyme A and the -COOH is part of the fatty acid being oxidised. (05 Mar 2000) |
| apolar bond | <chemistry> The attractive force between molecules due to the close positioning of non-hydrophilic portions of the two molecules. (09 Oct 1997) |
| bond | 1. That which binds, ties, fastens,or confines, or by which anything is fastened or bound, as a cord, chain, etc.; a band; a ligament; a shackle or a manacle. "Gnawing with my teeth my bonds in sunder, I gained my freedom." (Shak) 2. The state of being bound; imprisonment; captivity, restraint. "This man doeth nothing worthy of death or of bonds." 3. A binding force or influence; a cause of union; a uniting tie; as, the bonds of fellowship. "A people with whom I have no tie but the common bond of mankind." (Burke) 4. Moral or political duty or obligation. "I love your majesty According to my bond, nor more nor less." (Shak) 5. A writing under seal, by which a person binds himself, his heirs, executors, and administrators, to pay a certain sum on or before a future day appointed. This is a single bond. But usually a condition is added, that, if the obligor shall do a certain act, appear at a certain place, conform to certain rules, faithfully perform certain duties, or pay a certain sum of money, on or before a time specified, the obligation shall be void; otherwise it shall remain in full force. If the condition is not performed, the bond becomes forfeited, and the obligor and his heirs are liable to the payment of the whole sum. 6. An instrument (of the nature of the ordinary legal bond) made by a government or a corporation for purpose of borrowing money; as, a government, city, or railway bond. 7. The state of goods placed in a bonded warehouse till the duties are paid; as, merchandise in bond. 8. The union or tie of the several stones or bricks forming a wall. The bricks may be arranged for this purpose in several different ways, as in English or block bond (Fig. 1), where one course consists of bricks with their ends toward the face of the wall, called headers, and the next course of bricks with their lengths parallel to the face of the wall, called stretchers; Flemish bond (Fig.2), where each course consists of headers and stretchers alternately, so laid as always to break joints; Cross bond, which differs from the English by the change of the second stretcher line so that its joints come in the middle of the first, and the same position of stretchers comes back every fifth line; Combined cross and English bond, where the inner part of the wall is laid in the one method, the outer in the other. 9. <chemistry> A unit of chemical attraction; as, oxygen has two bonds of affinity. It is often represented in graphic formulae by a short line or dash. See Diagram of Benzene nucleus, and Valence. Arbitration bond. See Arbitration. Bond crediter, a debt contracted under the obligation of a bond. Bond (or lap) of a slate, the distance between the top of one slate and the bottom or drip of the second slate above, i. E, the space which is covered with three thicknesses; also, the distance between the nail of the under slate and the lower edge of the upper slate. Bond timber, timber worked into a wall to tie or strengthen it longitudinally. Synonym: Chains, fetters, captivity, imprisonment. Origin: The same word as band. Cf. Band, Bend. Source: Websters Dictionary (01 Mar 1998) |
| bond angle | This refers to the angle formed between two nuclei which are linked together. (09 Oct 1997) |
| bond dissociation energy | This is the energy needed to break the bonds between two linked atoms. (09 Oct 1997) |
| bond energy | The energy needed to break a molecular bond. (09 Oct 1997) |
| bond length | This is the distance between the nuclei of two atoms which have formed bonds with each other. (09 Oct 1997) |
| bufenolides (one double bond) | (05 Mar 2000) |
| carbon-carbon double bond isomerases | <enzyme> Enzymes that catalyze the shifting of a carbon-carbon double bond from one position to another within the same molecule. Registry number: EC 5.3.3 (12 Dec 1998) |
| pair bond | In animals, the social relationship established between a male and female for reproduction. It may include raising of young. (12 Dec 1998) |
| hydrophobic bond |
a linkage resulting from the tendency of nonpolar molecules (or their side chains) to aggregate in an aqueous environment because of their mutual repulsion of solvent.
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