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active principle |
Also found in: Acronyms, Wikipedia | 0.12 sec. |
active not passive. active principle the drugs or chemicals in a pharmaceutical preparation that exert an effect pharmacologically; as distinct from the inert fillers, wetting agents and other excipients also often included. active site that region of a protein, usually an enzyme, that binds to another molecule such as the substrate of the enzyme. active transport the movement of ions or molecules assisted by a carrier protein across the cell membranes and epithelial layers, usually against a concentration gradient, resulting directly from the expenditure of metabolic energy. For example, under normal circumstances more potassium ions are present within the cell and more sodium ions extracellularly. The process of maintaining these normal differences in electrolytic composition between the intracellular fluids is active transport. The process differs from simple diffusion or osmosis in that it requires the expenditure of metabolic energy. principle 1. a chemical component. 2. a substance on which certain of the properties of a drug depend. 3. a law of conduct. active principle any constituent of a drug that helps to confer upon it a medicinal property. reasonable person principle the basis for many decisions in cases alleging negligence. The court bases its judgment on what it considers a reasonable person, a reasonable veterinarian in our context, would have done in the circumstances. This is the evidence that most expert witnesses are asked to give, evidence about what should be expected of a member of their profession in terms of quality of performance. Called also principle of the reasonable person. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| ? Mentioned in | ? References in periodicals archive | ||
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| Combined use of sustained-release and immediate-release
analgesics with the same active ingredient and administration route is a
method for treating cancer pain recommended in the official journal of
the World Health Organization (WHO) and elsewhere. Based on its existing inhibitor OXYNON M, the MF series contains as
an active ingredient a type of neutralizing amine that elevates pH
levels in the temperature range where corrosion is most likely to occur. For example, applicators
who are QVM professionals use herbicides that utilize the lowest
effective active ingredient whenever possible. |
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