Proceedings of the Japan Academy

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1. O(H)-decomposing enzyme from Bac. Fulminans, when applied to O(H) substance, destroyed its O(H) activity reacting with anti-O(H) antibody in eel serum. Chemically it contained a kind of L-fucosidase as the principal component, and liberated from O(H) substance not only a large amount of fucose, which is the end determinant of O(H) specificity, but also a minute amount of galactose and a small amount of oligosaccharides containing fucose, and sometimes also galactose and N-acetylhexosamine.
2. O(H)-decomposing enzyme from Bac. Cereus, when applied to O(H) substance, destroyed its O(H) activities reacting with anti-O(H) antibodies in eel serum and anti-Sh, dysenteriae chicken serum. Chemically it contained a kind of β-D-galactosidase besides a kind of L-fucosidase, and liberated from O(H) substance not only fucose and galactose, which are the determinants of its specificities, but also a small amount of oligosaccharides, some of which contained fucose, galactose, and N-acetylhexosamine.

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1. Intracellular potentials were recorded from the olfactory bulb neurones of the unanesthetized rabbits.
2. The membrane potential of the mitral cell fluctuated spontaneously. When the membrane potential was depolarized to a critical level, spontaneous spikes were generated,
3. In response to lateral olfactory tracts timulation, some units discharged with short and invariable latency. In these units an antidromic spike was sometimes followed by a prolonged hyperpolarization.
4. In a deep layer of the bulb, the spikes were found to occur with a long latency upon a single shock to the lateral olfactory tract.
5. The mitral cells and the other unidentified neurones respo nded to a single shock of the nasal mucosa with a single spike or repetitive ones.

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