| titanium dioxide | TiO2;contains not less than 99.0% and not more than 100.5% of TiO2, calculated on the dry basis; used in creams and powders as a protectant against external irritations and solar rays. (05 Mar 2000) |
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| menthyl | <chemistry> A compound radical forming the base of menthol. Origin: Mentha + -yl. Source: Websters Dictionary (01 Mar 1998) |
| menthyl salicylate | Used as a sunscreen to filter out ultraviolet light in preparations to protect the skin from sunburn. (05 Mar 2000) |
| anthranilate monooxygenase | <enzyme> Catalyses the hydroxylation of anthranilate to hydroxyanthranilate in the presence of tetrahydropteridine and molecular oxygen; anthranilate hydroxylase is a synonym for this and EC 1.14.12.1 and EC 1.14.13.35 (formerly EC 1.14.12.2) Registry number: EC 1.14.16.3 Synonym: anthranilate 3-hydroxylase, anthranilate 3-monooxygenase (26 Jun 1999) |
| anthranilate phosphoribosyltransferase | <enzyme> An enzyme that catalyses the formation of n-5'-phosphoribosylanthranilic acid from anthranilate and phosphoribosylpyrophosphate, the first step in tryptophan synthesis in e. Coli. It exists in a complex with anthranilate synthase in bacteria. Chemical name: N-(5-Phospho-D-ribosyl)-anthranilate:pyrophosphate phospho-alpha-D-ribosyltransferase Registry number: EC 2.4.2.18 (12 Dec 1998) |
| anthranilate synthase | <enzyme> An enzyme that catalyses the formation of anthranilate (o-aminobenzoate) and pyruvic acid from chorismate and glutamine. Anthranilate is the biosynthetic precurser of tryptophan and numerous secondary metabolites, including inducible plant defense compounds. Chemical name: Chorismate pyruvate-lyase (amino-accepting) Registry number: EC 4.1.3.27 (12 Dec 1998) |
| benzoyl-CoA-anthranilate N-benzoyltransferase | <enzyme> Specific for anthranilate; almost no activity towards 4-hydroxyanthranilate; involved in phytoalexin biosyntesis Registry number: EC 2.3.1.- Synonym: b-CoA-anb transferase, benzoyl-coenzyme a-anthranilate n-benzoyltransferase (26 Jun 1999) |
| nickel titanium | <dentistry> An especially strong orthodontic wire which allows for rapid tooth movement. (08 Jan 1998) |
| titanium | <chemistry, element> An elementary substance found combined in the minerals manaccanite, rutile, sphene, etc, and isolated as an infusible iron-gray amorphous powder, having a metallic luster. It burns when heated in the air. Atomic weight: 48.1 Abbreviation: Ti Origin: NL, fr. L. Titani or Titanes, Gr, the sons of the earth. (30 Mar 1998) |
| titanium greenfield ivc filter | <radiology> Advantages: low profile: 14.3 Fr introducer sheath, percutaneous placement, lack of ferromagnetic properties, low recurrent PE rate (3-5%), low IVC thrombosis rate (1-9%), successful placement (97%) disadvantages: maximum caval diameter = 28mm, tilting/leg assymetry, difficult placement from left femoral approach see also: indications (12 Dec 1998) |
| active carbon dioxide | Activated carbon dioxide, a complex of N-carboxybiotin (biotin + CO2) and an enzyme; the form in which carbon dioxide is added to other molecules in carboxylations; e.g., to methylcrotonyl-CoA to form beta-methylglutaconyl in the catabolism of leucine, and to acetyl-CoA to form malonyl-CoA. See: acetyl-CoA carboxylase. (05 Mar 2000) |
| arteriovenous carbon dioxide difference | <physiology> The difference in carbon dioxide content (in ml per 100 ml blood) between arterial and venous blood. (05 Mar 2000) |
| carbon dioxide | <biochemistry, physiology> A metabolic byproduct of carbohydrate metabolism. Carbon Dioxide collects in the tissues, is cleared by the blood (via the veins) and removed from the body via the lungs when we exhale air. Abbreviation: CO2 (13 Nov 1997) |
| carbon dioxide acidosis | <biochemistry> A metabolic derangement of acid-base balance where the blood pH is abnormally low. Causes include haemorrhagic shock, cardiogenic shock, severe dehydration, sepsis, toxic ingestion (for example isopropyl alcohol, methanol), alcoholic ketoacidosis, lactic acidosis, renal failure and diabetic ketoacidosis. Respiratory acidosis will occur if the lungs are not ventilating properly resulting in an excess of carbon dioxide in the body. (25 Jun 1999) |
| carbon dioxide blood level | A measure of the bicarbonate level in the blood based on a venipuncture specimen. The serum carbon dioxide is one of the normally reported values in the electrolytes profile. Lower levels of carbon dioxide indicate an acidosis. The normal level is 20 to 29 mEq/L. Lower than normal levels can indicate diabetic ketoacidosis, lactic acidosis, alcoholic ketoacidosis, kidney disease, renal failure, diarrhoea, Addison's disease, ethylene glycol poisoning or methanol poisoning. Greater than normal levels can be seen with excessive vomiting, hyperaldosteronism and Cushing's syndrome. (27 Sep 1997) |