| FIO2 | forced inspiratory oxygen; fractional concentration of oxygen in inspired gas |
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| HO | hand orthosis; heterotopic ossification; high oxygen; hip orthosis; history of; Holt-Oram [syndrome]... |
| O2 | both eyes; diatomic oxygen; molecular oxygen |
| PaO2 | partial oxygen tension in arterial blood; partial pressure of oxygen in arterial blood |
| QO2 | oxygen quotient; oxygen utilization |
| dopamine uptake inhibitors | Drugs that block the transport of dopamine into axon terminals or into storage vesicles within terminals. most of the adrenergic uptake inhibitors also inhibit dopamine uptake. (12 Dec 1998) |
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| iodine uptake test | A test of thyroid function in which 131I-iodide is given orally; after 24 hours, the amount present in the thyroid gland is measured and compared with normal values. Synonym: radioactive iodide uptake test, RAI test. (05 Mar 2000) |
| T3 uptake test | A test of thyroid function in which triiodothyronine (T3) is added to a patient's serum in vitro to measure the relative affinities of serum proteins and of an added competitive substance for T3; higher T3 uptakes are associated with hyperthyroidism. Synonym: T3 uptake test. (05 Mar 2000) |
| triiodothyronine uptake test | A test of thyroid function in which triiodothyronine (T3) is added to a patient's serum in vitro to measure the relative affinities of serum proteins and of an added competitive substance for T3; higher T3 uptakes are associated with hyperthyroidism. Synonym: T3 uptake test. (05 Mar 2000) |
| uptake | The absorption by a tissue of some substance, food material, mineral, etc. And its permanent or temporary retention. (05 Mar 2000) |
| uptake hydrogenase | <enzyme> Isolated from heterocysts of aerobically grown anabena filaments; also from rhodobacter capsulatus; belongs to the class of nife hydrogenases; allows the cell to grow autographically with h(2) as the electron source; isolated as a heterodimer comprising a small and large subunit; has been sequenced Registry number: EC 1.12.- Synonym: h2-oxidizing(uptake) hydrogenase, hydrogenase II, h2-uptake hydrogenase (26 Jun 1999) |
| alactic oxygen debt | That part of the oxygen debt that is not lactacid oxygen debt; during recovery, stores of ATP and creatine phosphate must be replenished by oxidative metabolism, and a small amount of oxygen is also needed to restore the normal oxyhemoglobin levels throughout the circulating blood. (05 Mar 2000) |
| alveolar-arterial oxygen difference | The difference or gradient between the partial pressure of oxygen in the alveolar spaces and the arterial blood: P(A-a)02. Normally in young adults this value is less than 20 mm Hg. See: alveolar gas equation. (05 Mar 2000) |
| arteriovenous oxygen difference | <physiology> The difference in the oxygen content (in ml per 100 ml blood) between arterial and venous blood. (05 Mar 2000) |
| biochemical oxygen demand | The amount of oxygen aerobicorganisms need to carry out oxidative metabolism in watercontaining organic matter, such as sewage. (09 Oct 1997) |
| carbon-oxygen ligases | <enzyme> Enzymes that catalyze the joining of two molecules by the formation of a carbon-oxygen bond. Registry number: EC 6.1 (12 Dec 1998) |
| carbon-oxygen lyases | <enzyme> Enzymes that catalyze the cleavage of a carbon-oxygen bond by means other than hydrolysis or oxidation. Registry number: EC 4.2 (12 Dec 1998) |
| reactive oxygen species | Reactive intermediate oxygen species including both radicals and non-radicals. These substances are constantly formed in the human body and have been shown to kill bacteria and inactivate proteins, and have been implicated in a number of diseases. Scientific data exist that link the reactive oxygen species produced by inflammatory phagocytes to cancer development. (12 Dec 1998) |
| chemical oxygen demand | The amount of dissolved oxygen required to combine with chemicals in wastewater. A measure of the oxygen equivalent of that portion of organic matter that is susceptible to oxidation by a strong chemical oxidizing agent. (05 Dec 1998) |
| rubredoxin-oxygen oxidoreductase | <enzyme> Contains fad and a new type of haem; site of oxygen reduction to water by desulfovibrio gigas coupled with NADH oxidation Registry number: EC 1.9.3.- Synonym: rubredoxin oxidase (26 Jun 1999) |