| ethidium bromide | <chemical, molecular biology> A dye that intercalates into DNA and to some extent RNA. Intercalation into linear DNA is easier than into circular DNA and the addition of ethidium bromide to DNA prior to ultracentrifugation on a caesium chloride gradient is much used to separate nuclear and mitochondrial or plasmid DNA for analytical purposes. Because less intercalates into the circular DNA, the density remains higher. (18 Nov 1997) |
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| ethinamate | 1-Ethynylcyclohexyl carbamate;a mild central nervous system depressant. (05 Mar 2000) |
| ethindrone | <chemical> 17 alpha-hydroxypregn-4-en-20-yn-3-one. A synthetic steroid hormone with progestational effects. Pharmacological action: progestational hormones, synthetic. Chemical name: Pregn-4-en-20-yn-3-one, 17-hydroxy-, (17alpha)- (12 Dec 1998) |
| ethine | <chemistry> Acetylene. Source: Websters Dictionary (01 Mar 1998) |
| ethinyl | Synonym: ethynyl. (05 Mar 2000) |
| ethinyl estradiol | <chemical> (17 alpha)-19-norpregna-1,3,5(10)-trien-20-yne-3,17-diol. A semisynthetic oestrogen with high oral oestrogenic potency. It is often used as the oestrogenic component in oral contraceptives. Pharmacological action: antineoplastic agent, hormonal, oestrogens, synthetic. Chemical name: 19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, (17alpha)- (12 Dec 1998) |
| ethinyl estradiol-norgestrel combination | <chemical> Ethinyl estradiol and norgestrel given in fixed proportions. It has proved to be an effective contraceptive. Pharmacological action: contraceptives, oral, combined, contraceptives, oral, synthetic, contraceptives, postcoital, synthetic. (12 Dec 1998) |
| ethinyl trichloride | <chemical> A highly volatile inhalation anaesthetic used mainly in short surgical procedures where light anaesthesia with good analgesia is required. It is also used as an industrial solvent. Prolonged exposure to high concentrations of the vapor can lead to cardiotoxicity and neurological impairment. Pharmacological action: anaesthetics, inhalation, solvents. Chemical name: Ethene, trichloro- (12 Dec 1998) |
| ethinylestradiol-17 alpha sulfotransferase | <enzyme> Responsible for the sulphation of 17 alpha-ethinylestradiol; found in human liver cytosol; mol mass 33-kD; not a phenol- or monoamine-sulphating phenolsulphotransferase nor a hydroxysteroid sulphotransferase Registry number: EC 2.8.2.- Synonym: 17 alpha-ethinyloestradiol sulphotransferase, ee(2) st, ee2 st (26 Jun 1999) |
| ethinylestrenol | <chemical> (17 alpha)-19-norpregn-4-en-20-yn-17-ol. A synthetic progestational hormone used often in mixtures with oestrogens as an oral contraceptive. Pharmacological action: contraceptives, oral, synthetic, progestational hormones, synthetic. Chemical name: 19-Norpregn-4-en-20-yn-17-ol, (17alpha)- (12 Dec 1998) |
| ethiodised oil | <chemical> Ethyl ester of iodinated fatty acid of poppyseed oil. It contains 37% organically bound iodine and has been used as a diagnostic aid (radiopaque medium) and as an antineoplastic agent when part of the iodine is 131-I. Pharmacological action: antineoplastic agent, contrast media. Chemical name: Ethiodised Oil (12 Dec 1998) |
| ethionamide | <chemical> A second-line antitubercular agent that inhibits mycolic acid synthesis. It also may be used for treatment of leprosy. Pharmacological action: antitubercular agents, leprostatic agents. Chemical name: 4-Pyridinecarbothioamide, 2-ethyl- (12 Dec 1998) |
| ethionic | <chemistry> Pertaining to, derived from, or designating, an acid so called. <chemistry> Ethionic acid, a liquid derivative of ethylsulphuric and sulphuric (thionic) acids, obtained by the action of sulphur trioxide on absolute alcohol. Origin: Ethyl + thionic. Source: Websters Dictionary (01 Mar 1998) |
| ethionine | <chemical> 2-amino-4-(ethylthio)butyric acid. An antimetabolite and methionine antagonist that interferes with amino acid incorporation into proteins and with cellular ATP utilization. It also produces liver neoplasms. Pharmacological action: antimetabolites, carcinogens. Chemical name: L-Homocysteine, S-ethyl- (12 Dec 1998) |
| ethiopia | An independent state in eastern africa, east of sudan and bounded on the north by the red sea. Its capital is addis ababa. It is an ancient country, being, from early times, under the sway of the ancient egyptians, jews, christians, and moslems. In modern times it has been governed by italy, great britain, france. It gained independence in 1941. In 1952 it became federated with eritrea. The name is from the greek aithi- (burn) + opsis (appearance), with reference to the dark skin of the natives. The indigenous name of the country is abyssinia (from an amharic root hbs, meaning mixed, with reference to the mixed black and white races inhabiting the country); its biblical name cush comes from the name of the son of ham with reference to the country of his descendants, possibly also from an ethiopian word meaning dark-faced. (12 Dec 1998) |