From Maxwell's Demon to the self-organization of mass transfer processes in living systems

As a result of cyclic interactions with their environment, microparticles a re often drawn into a directed, stochastically determined motion and subseq uently arrange themselves into dynamical structures. In the present review, the possibility of a directed motion of microparticles in the presence of weak, asymmetric, periodic governing fields is analyzed. The minimum energy requirement for changing from random to directed motion is estimated. Appl ications to regulatory processes in biosystems, such as the virus-bacterium interaction and intercellular movement of vesicles, enzymes, and ions, are discussed and certain high-technology uses of these effects considered.