| oxygen poisoning | A body disturbance resulting from breathing high partial pressures of oxygen; characterised by visual and hearing abnormalities, unusual fatigue while breathing, muscular twitching, anxiety, confusion, incoordination, and convulsions; although the mechanism for development of the condition is obscure, a disruption of enzymatic activity is likely, perhaps as a result of free radical formation. Synonym: oxygen poisoning. (05 Mar 2000) |
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| oxygen radical | <chemistry> Any oxygen species that carries an unpaired electron (except free oxygen). Examples are the hydroxyl radical and the superoxide anion. These radicals are very powerful oxidizing agents and cause structural damage to proteins and nucleic acids. They mediate the damaging effects of ionising radiation. (18 Nov 1997) |
| oxygen radioisotopes | Unstable isotopes of oxygen that decay or disintegrate emitting radiation. O atoms with atomic weights 13, 14, 15, 19, and 20 are radioactive oxygen isotopes. (12 Dec 1998) |
| oxygen tent | A transparent enclosure, suspended over the bed and enclosing the patient, used to supply a high concentration of oxygen. (05 Mar 2000) |
| oxygen therapy | Treatment in which an increased concentration of oxygen is made available for breathing, through a nasal catheter, tent, chamber, or mask. (05 Mar 2000) |
| oxygen toxicity | A body disturbance resulting from breathing high partial pressures of oxygen; characterised by visual and hearing abnormalities, unusual fatigue while breathing, muscular twitching, anxiety, confusion, incoordination, and convulsions; although the mechanism for development of the condition is obscure, a disruption of enzymatic activity is likely, perhaps as a result of free radical formation. Synonym: oxygen poisoning. (05 Mar 2000) |
| oxygen utilization coefficient | The extraction coefficient for oxygen in any given tissue. (05 Mar 2000) |
| oxygen-15 | A cyclotron-produced, positron-emitting radioisotope of oxygen with a half-life of 122.2 seconds; used in studies of respiratory function and in positron emission tomography. (05 Mar 2000) |
| oxygen-16 | The common oxygen isotope, making up 99.76% of natural oxygen. (05 Mar 2000) |
| oxygen-17 | The rarest of the stable oxygen isotopes, making up 0.04% of natural oxygen. (05 Mar 2000) |
| oxygen-18 | A stable oxygen isotope making up 0.20% of natural oxygen; used in mass spectrometry and in NMR studies of tissue. Synonym: heavy oxygen. (05 Mar 2000) |
| oxygenase | <enzyme> That catalyses the incorporation of the oxygen of molecular oxygen into organic substrates. Dioxygenases (oxygen transferases) catalyse introduction of both atoms of molecular oxygen, monoxygenases (mixed function oxygenases) introduce one atom, the other becomes reduced to water, so that these enzymes require a second substrate, acting as oxygen donor. Both types are used by bacteria in degradation of aromatic compounds. Dioxygenases all contain iron, for example tryp 2, 3 dioxygenase. Examples of mono oxygenases are the enzymes that hydroxylate proline and lysine of collagen, using ketoglutarate. (18 Nov 1997) |
| oxygenases | <enzyme> Registry number: EC 1.13. (12 Dec 1998) |
| oxygenate | <chemistry> To unite, or cause to combine, with oxygen; to treat with oxygen; to oxidize; as, oxygenated water (hydrogen dioxide). Origin: Cf. F. Oxygener. Source: Websters Dictionary (01 Mar 1998) |
| oxygenated haemoglobin | <physiology> See Hemoglobin. Origin: Oxy- + haemoglobin, hemoglobin. Source: Websters Dictionary (01 Mar 1998) |
Synonyms : Bristol-Myers Squibb Brand of Oxymorphone Hydrochloride, Endo Brand of Oxymorphone Hydrochloride, MRZ 2593-Br, MRZ-2593, Methylnaloxone, N-Methylnaloxone, N-Methylnaloxone Bromide, Naloxone MB, Naloxone Methobromide, Naloxone Methylbromide, Numorphan, MRZ 2593
Synonyms : Glicentin (33-69), Proglucagon (33-69)
Synonyms : Belmac Brand of Oxyphenbutazone, Diflamil, Novartis Ophthalmics Brand of Oxyphenbutazone, Oxyphenylbutazone, Tanderil
Synonyms : Acetfenolisatin, Diasatine, Isocrin, Oxyphenisatine, Warner Chilcott Brand of Oxyphenisatin Acetate, Acetate, Oxyphenisatin
Synonyms : 2-((Cyclohexylhydroxyphenylacetyl)oxy)-N, N-diethyl-N-methylethanaminium, Atrenyl, Metacin, Methacin, Oxyphenon, Oxyphenonium Bromide, (+)-Isomer, Oxyphenonium Bromide, (+-)-Isomer, Oxyphenonium Bromide, (-)-Isomer, Oxyphenonium Iodide, (R)-Isomer, Spastrex
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| oxycephaly |
a congenital abnormality of the skull; the top of the skull assumes a cone shape
Ãâó: wordnet.princeton.edu/perl/webwn
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| oxygen deficit |
temporary oxygen shortage in cells resulting from strenuous exercise
Ãâó: wordnet.princeton.edu/perl/webwn
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| oxytocin |
hormone secreted by the posterior pituitary gland (trade name Pitocin); stimulates contractions of the uterus and ejection of milk
Ãâó: wordnet.princeton.edu/perl/webwn
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| Oxyuridae |
pinworms
Ãâó: wordnet.princeton.edu/perl/webwn
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| oxygen |
a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
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| OXY | a drug that induces labor by stimulating contractions of the muscles of the uterus |
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| OXY | hormone secreted by the posterior pituitary gland (trade name Pitocin) |
| OXY | word having stress or an acute accent on the last syllable |
| OXY | large widely-distributed genus of evergreen shrubs or subshrubs having odd-pinnate leaves and racemose or spicate flowers each having a pealike corolla with a clawed petal |
| OXY | tufted locoweed of southwestern United States having purple or pink to white flowers |
| OXY | ruddy duck |
| OXY | reddish-brown stiff-tailed duck of North America and northern South America |
| OXY | taipans |
| OXY | large highly venomous snake of northeastern Australia |
| OXY | pinworms |
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