The giant nerve fiber of the shr imp is known to have enormously h igh conduct ion velocity, 90 200 m/see (Kusano, 1965). W h e n one considers the morphological basis for this physiological property, there arise two questions: whe ther there is in the nerve sheath any par t icular fine structural feature which accounts for the h igh conduct ion velocity; and, the most fundamenta l problem, whe...

1. Drayer, D. E., Lowenthal, D. T., Restivo, K. M., et al., Steady-state serum levelsof quinidine and active quinidine metabolites in cardiac patients with varying degrees of renal function. Clin. Pharmacol. Ther. 24, 31-39 (1978). 2. Guentert, T. W., Coates, P. E., Upton, R. A., et al., Determination of quinidine and its major metabolites by high performance liquid chromatography. J. Chromatog...

The models tha t we consider are 1-dimensionM ferromagnets with a ra ther peculiar, nontranslat ionMly invar iant interact ion [1-4]. I t will be seen tha t the special form of this interact ion leads to a ra ther simple formulat ion of the renormalizat ion group equation. Apar t f rom the lack of t ranslat ion invariance these models are supposed to behave in m a n y respects like ordinary 1-d...

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