Lenz’s rule

In effect of such activity eddy currents in the studied area are induced, producing own magnetic fields which following Lenz s rule are directed adversely to the induction field this decreasing its intensity (Fig. 1). 

Substances having only paired electrons are diamagnetic. When they are introduced into an external magnetic field, a force acts on the electrons, i.e. an electric current is induced. The magnetic field of this current is opposed to the external field (Lenz s rule). As a result, the substance experiences a repulsion by the external magnetic field the repulsive force is rather weak, but ever present. 

The current tends to inhibit the growth of the phase, so that the latter gains maximum thickness with time and does not grow any more. At that nonequiUbrium vacancies increase this maximum thickness as compared with the case of quasi-equiUbrium vacancies (Figure 2.2). In such a way, nonequiUbrium vacancies damp any outer effects (similar to Lenz s rule in electromagnetism or to the le ChateUer-Braun general principle). 

Dr Lipinski s rules for dmglike CNS compounds were presented by him at the Drew University Medicinal Chemistry Special Topics Course in July 1999 and have been published in Pajouhesh, H., Lenz, G.R. Medicinal properties of successful central nervous system drugs. NeuroRx Exp. NeuroTher. 2005,2, 541-553. 

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