| cholic acids | <chemical> The 3 alpha,7 alpha,12 alpha-trihydroxy-5 beta-cholanic acid family of bile acids in man, usually conjugated with glycine or taurine. They act as detergents to solubilise fats for intestinal absorption, are reabsorbed by the small intestine, and are used as cholagogues and choleretics. Pharmacological action: cholagogues and choleretics, gastrointestinal agents. (12 Dec 1998) |
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| cholic | Relating to the bile. Synonym: choleic. (05 Mar 2000) |
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| cholic acid | A family of steroids comprising the bile acids (or salts), generally in conjugated form (e.g., glycocholic and taurocholic acids). Chemically, cholic acids are cholan-24-oic (cholanic) acids (the terminal C24 of cholane becoming a -COOH group); biologically, cholic acids are derived from cholesterol (a cholestane derivative) and display varying degrees of oxidation (OH groups) and orientation at positions 3, 7, and 12. It is these oxidations and orientations that distinguish the several cholic acid; e.g., cholic acid is 3a,7a,12a-trihydroxy-5b-cholan-24-oic acid, deoxycholic acid is 3a,12a-dihydroxy-5b-cholanic acid. Synonym: cholalic acid, cholanic acid. (05 Mar 2000) |
| acids, carbocyclic | Carboxylic acids that have a homocyclic ring structure in which all the ring atoms are carbon. (12 Dec 1998) |
| acids, heterocyclic | A class of acids containing a ring structure in which atleast one atom other than carbon is incorporated. (12 Dec 1998) |
| acids, noncarboxylic | Inorganic acids with a non metal, other than carbon, attached to hydrogen, or an acid radical containing no carbon. (12 Dec 1998) |
| acroleic acids | A series of unsaturated aliphatic acids of the general formula R==CH-COOH; the prototype, acrylic acid (R=CH2) or 2-propenoic acid, is derived from propionic acid by reduction or from glycerol by dehydration. Synonym: acroleic acids. (05 Mar 2000) |
| acrylic acids | A series of unsaturated aliphatic acids of the general formula R==CH-COOH; the prototype, acrylic acid (R=CH2) or 2-propenoic acid, is derived from propionic acid by reduction or from glycerol by dehydration. Synonym: acroleic acids. (05 Mar 2000) |
| adipic acids | A group of dicarboxylic acids that are structurally related to hexanedioic acid (adipic acid). (12 Dec 1998) |
| aldonic acids | Monosaccharide derivatives in which the aldehyde group has been oxidised to a carboxyl group. They may form lactones (e.g., galactonic acid). Synonym: glyconic acids. (05 Mar 2000) |
| aliphatic acids | The acids of nonaromatic hydrocarbons (e.g., acetic, propionic, butyric acids); the so-called fatty acids of the formula R-COOH, where R is a nonaromatic (aliphatic) hydrocarbon. (05 Mar 2000) |
| alkanesulfonic acids | Sulfonic acid derivatives that are substituted with an aliphatic hydrocarbon group. (12 Dec 1998) |
| amino acids | Organic compounds that generally contain an amino (-nh2) and a carboxyl (-cooh) group. Twenty alpha-amino acids are the subunits which are polymerised to form proteins. (12 Dec 1998) |
| amino acids, branched-chain | Amino acids which have a branched carbon chain. (12 Dec 1998) |
| amino acids, cyclic | A class of amino acids characterised by a closed ring structure. (12 Dec 1998) |
| amino acids, peptides, and proteins | Amino acids and chains of amino acids connected by peptide linkages. (12 Dec 1998) |