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first-order kinetics |
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first-order kinetics, a chemical reaction in which the rate of decrease in the number of molecules of a substrate is proportional to the concentration of substrate molecules remaining. In first-order reactions involving two substances, only one of the concentrations affects the rate. The rate of metabolism of most drugs follows the rule of first-order kinetics and is independent of the dose. Also called first-order reaction. See also kinetics. 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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| Molecular motors are mechano-chemical systems that in vivo may depart from simple (pseudo-) first-order kinetics. Rate of digestion (k^sub d^) was calculated assuming first-order kinetics (Mertens, 1987) and 100% potential ruminai digestibility of starch. This method assumes that the disruption of the molecular interaction follows first-order kinetics at a given force and thus the force distribution represents the integration of probability of rupture over a range of force. |
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