| ABC | absolute basophil count; absolute bone conduction; acalculous biliary colic; acid balance control; a... |
|---|---|
| ABLB | alternate binaural loudness balance |
| AMLB | alternate monoaural loudness balance |
| bal | balance; balsam |
| BALB | binaural alternate loudness balance |
| CELSS | Controlled Ecological Life Support System |
|---|---|
| ABB | Acid base balance |
| GTB | Glomerulotubular balance |
| NB | Nitrogen Balance |
| EB | energy balance |
| ecological chemistry | Chemistry that concentrates on the effects of woman-made chemicals on the environment as well as the development of agents that are not harmful to the environment. The study of the molecular interactions between species and between species and the environment. (05 Mar 2000) |
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| ecological ectocrine | A chemical substance that undergoes biosynthesis in one species and that exerts an effect on the function of another species through mechanisms of the external environment; e.g., the biosynthesis of vitamins by ruminants and their subsequent ingestion by other animals. See: ectohormone. (05 Mar 2000) |
| ecological epidemiology | <epidemiology> A branch of epidemiology which views disease as a result of the ecological interactions between populations of hosts and parasites; what we do. We contrast this with classical epidemiology. (05 Dec 1998) |
| ecological fallacy | The bias that may occur because an association observed between variables at an aggregate level does not necessarily represent an association that exists at an individual level; an error of inference due to failure to distinguish between different levels of organization. (05 Mar 2000) |
| ecological protection | <ecology> Protection consists of measures undertaken to protect and preserve elements of an ecosystem's structure and functions against future degradation. (10 Nov 1998) |
| ecological restoration | <ecology> The process of renewing and maintaining ecosystem health. Ecological restoration is the process of intentionally altering a site to establish a defined, indigenous, historic ecosystem. The goal of this process is to emulate the structure, function, diversity, and dynamics of the specified ecosystem. (10 Nov 1998) |
| ecological system | <ecology> An ecosystem is the dynamic and interrelating complex of plant and animal communities and their associated non-living environment. The physical and climactic features and all the living and dead organisms in an area that are interrelated in the transfer of energy and material. An interacting complex of a community and its environment functioning as an ecological unit in nature. Differs from system in being a more rigorous definition that encompasses and requires assumptions of energetics, ecological interactions, species adaptations and so forth. (13 Nov 1997) |
| ecological systems, closed | Systems that provide for the maintenance of life in an isolated living chamber through reutilization of the material available, in particular, by means of a cycle wherein exhaled carbon dioxide, urine, and other waste matter are converted chemically or by photosynthesis into oxygen, water, and food. (12 Dec 1998) |
| acid-base balance | The normal balance between acid and base in the blood plasma, expressed in the hydrogen ion concentration or pH, resulting from the relative amounts of acidic and basic materials ingested and produced by body metabolism, compared to the relative amounts of acidic and basic materials excreted from the body and consumed by body metabolism; the normal state of acid-base balance is not one of neutrality, with equal concentrations of hydrogen and hydroxyl ions, but a more alkaline state with a certain excess of hydroxyl ions. Synonym: acid-base equilibrium. (05 Mar 2000) |
| alternate binaural loudness balance test | ABLB test, a test for recruitment in one ear; the comparison of relative loudness of a series of intensities presented alternately to either ear. (05 Mar 2000) |
| balance | 1. An apparatus for weighing. In its simplest form, a balance consists of a beam or lever supported exactly in the middle, having two scales or basins of equal weight suspended from its extremities. Another form is that of the Roman balance, our steelyard, consisting of a lever or beam, suspended near one of its extremities, on the longer arm of which a counterpoise slides. The name is also given to other forms of apparatus for weighing bodies, as to the combinations of levers making up platform scales; and even to devices for weighing by the elasticity of a spring. 2. Act of weighing mentally; comparison; estimate. "A fair balance of the advantages on either side." (Atterbury) 3. Equipoise between the weights in opposite scales. 4. The state of being in equipoise; equilibrium; even adjustment; steadiness. "And hung a bottle on each side To make his balance true." (Cowper) "The order and balance of the country were destroyed." (Buckle) "English workmen completely lose their balance." (J. S. Mill) 5. An equality between the sums total of the two sides of an account; as, to bring one's accounts to a balance; also, the excess on either side; as, the balance of an account. " A balance at the banker's. " "I still think the balance of probabilities leans towards the account given in the text." (J. Peile) 6. A balance wheel, as of a watch, or clock. See Balance wheel (in the Vocabulary). 7. <astronomy> The constellation Libra. The seventh sign in the Zodiac, called Libra, which the sun enters at the equinox in September. 8. A movement in dancing. See Balance, S. Balance electrometer, a kind of balance, with a poised beam, which indicates, by weights suspended from one arm, the mutual attraction of oppositely electrified surfaces. Balance fish. <medicine> An equilibrium between the money values of the exports and imports of a country; or more commonly, the amount required on one side or the other to make such an equilibrium. Balance valve, a valve whose surfaces are so arranged that the fluid pressure tending to seat, and that tending to unseat the valve, are nearly in equilibrium; especially, a puppet valve which is made to operate easily by the admission of steam to both sides. See Puppet valve. Hydrostatic balance. See Hydrostatic. To lay in balance, to put up as a pledge or security. To strike a balance, to find out the difference between the debit and credit sides of an account. Origin: OE. Balaunce, F. Balance, fr. L. Bilan, bilancis, having two scales; bis twice (akin to E. Two) + lanx plate, scale. Source: Websters Dictionary (01 Mar 1998) |
| balance theory | In social psychology, a theory which assumes that steady and unsteady states can be specified for cognitive units, such as an individual and his or her attitudes or acts, and that such units tend to seek steady states (balance); e.g., balance exists when both parts of a unit are evaluated the same, but disequilibrium arises when both parts are not evaluated the same, which causes either cognitive reevaluation of the parts or their segregation. See: cognitive dissonance theory, consistency principle. (05 Mar 2000) |
| binaural alternate loudness balance test | A test for recruitment in one ear; the comparison of relative loudness of a series of intensities presented alternately to either ear. Synonym: BALB test. (05 Mar 2000) |
| water-electrolyte balance | The state of the body in relation to the intake and excretion of water and electrolytes, particularly sodium and potassium. It exists in a metabolic balance internally with body fluid compartments, total body water, blood volume, extracellular space, etc., externally through sensible and insensible sweating. The hypothalamus controls water balance. (12 Dec 1998) |
| Wilhelmy balance | A device for measuring surface tension in terms of the pull exerted on a thin plate of platinum or other material suspended vertically through the surface; used in a Langmuir trough to study pulmonary surfactant. (05 Mar 2000) |
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