✦ LIBER ✦

Chiral interaction and stochastic kinetics in stirred crystallization of amino acids

✍ Scribed by Dilip K. Kondepudi; Mustafa Culha

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 192 KB
Volume: 10
Category: Article
ISSN: 0899-0042
DOI: 10.1002/(sici)1520-636x(1998)10:3<238::aid-chir6>3.0.co;2-5

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✦ Synopsis

A study of chirally selective interaction in the stirred crystallization of glutamic acid and lysine is presented. The crystallization of S-glutamic acid is influenced by the presence of S-lysine but not R-lysine. Crystal nuclei in stirred systems are produced due to secondary nucleation. Secondary nucleation is an autocatalytic process in which a crystal produces secondary nuclei due to fluid motion, and due to crystal stirrer and crystal-crystal collisions. As a result of this autocatalysis, small fluctuations in the nucleation rates are amplified and the kinetics show a marked stochastic behavior. We investigate the stochastic behavior in detail and propose a kinetic mechanism that explains both the increase and the statistical distribution of the crystallization times of S-glutamic acid due to the presence of S-Lysine.

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