| active vasodilation | Vasodilation caused by decrease in tonus of smooth muscle in the wall of a vessel. (05 Mar 2000) |
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| activities of daily living | The things we normally do in daily living including any daily activity we perform for self-care (such as feeding ourselves, bathing, dressing, grooming), work, homemaking, and leisure. The ability or inability to perform ADLs can be used as a very practical measure of ability/disability in many disorders. (12 Dec 1998) |
| activities of daily living scale | A scale to score physical activity and its limitations, based on answers to simple questions about mobility, self-care, grooming, etc; widely used in geriatrics, rheumatology, etc. (05 Mar 2000) |
| activity | 1. The state of being active, the ability to produce some effect, the extent of some function or action. 2. <chemistry> A thermodynamic quantity that represents the effective concentration of a solute in a nonideal solution, if concentrations are replaced by activities, the equations for equilibrium constants, electrode potentials, osmotic pressure, boiling point elevation, freezing point depression and vapour pressures of volatile solutes are converted from approximations that hold only for dilute solutions to exact equations that hold for all concentrations. The activity is equal to the product of the concentration and the activity coefficient, a dimensionless number measuring deviation from nonideality. Symbol a. The potential or true thermodynamic activity of a substance, as opposed to its molar concentration. 3. <radiobiology> The number of nuclear transitions or disintegrations occurring in a given quantity of radioactive material per unit time. The SI unit of activity is s-1. The special name for the unit of activity is becquerel (Bq). The previously used special unit of activity, curie (Ci), is being replaced by the becquerel. 1 Bq = 2.7 x E-11 Ci. 1 Ci = 3.7 x E10 Bq. 4. Optical activity. (16 Dec 1997) |
| activity coefficient | <chemistry> The factor by which the value of a concentration of a solute must be multiplied to determine its true thermodynamic activity. (06 May 1997) |
| activity cycles | Bouts of physical irritability or movement alternating with periods of quiescence. It includes biochemical activity and hormonal activity which may be cellular. These cycles are shorter than 24 hours and include sleep-wakefulness cycles and the periodic activation of the digestive system. (12 Dec 1998) |
| activity, drug | A measure of the physiological response a drug produces in the body. A less active drug produces less response (and visa versa). (12 Dec 1998) |
| activation energy |
The activation energy in chemistry is the energy needed by a system to initiate a particular process. Activation energy is often used to denote the minimum energy needed for a specific chemical reaction to occur. For a reaction to occur between two colliding molecules, they must collide in the correct orientation, and possess a certain, minimum, amount of energy. As the molecules approach each other, their electron clouds repel each other. ...
출처: en.wikipedia.org/wiki/Activation_energy
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| active site |
活性部位, That portion of a protein, usually an enzyme, whose structural integrity is required for function (eg, the substrate binding site of an enzyme). Enzymes may have more than one active site and so catalyse more than one reaction. Competitive inhibitors of an enzyme reaction bind reveribly to the active site and reduce its availability for normal substrate.
출처: www.geocities.com/bioinfoweb/glossary/glossary.htm...
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| active immunity |
自動免疫, Immunity gained by direct exposure to antigens followed by antibody production.
출처: www.geocities.com/bioinfoweb/glossary/glossary.htm...
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| active |
A person who has been initiated into lifelong membership in a Greek organization. Also called a Member.
출처: www.geocities.com/mcmasterdu/glossary.html
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| activate |
In biology, to stimulate a cell in a resting state to become active. This causes biochemical and functional changes in the activated cell.
출처: www.stjude.org/glossary
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| activ | transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient |
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| activ | a trust in which the trustee must perform certain duties |
| activ | the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb |
| activ | in an active manner |
| activ | the trait of being active |
| activ | the state of being active |
| activ | a policy of taking direct and militant action to achieve a political or social goal |
| activ | a militant reformer |
| activ | advocating or engaged in activism |
| activ | advocating or engaged in activism |
| activ | any specific activity |
| activ | the trait of being active |