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Medical Definition of Arrhenius plot
1. A plot of the logarithm of reaction rate against the reciprocal of absolute temperature. For a single stage reaction this gives a straight line from which the activation energy and the frequency factor can be determined. Often applied to data from complex biological systems when the form observed is frequently a series of linear portions with sudden changes of slope. Great caution must be observed in interpreting such slopes in terms of activation energies for single processes. This entry appears with permission from the Dictionary of Cell and Molecular Biology (22 Feb 2008)