二三の哺乳動物の神経細胞にみられた性的差異
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概要
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The present paper is to report a sex difference found in nuclear morphology of nerve cells of dogs, cats and pigs, as regard to the occurrence of the nucleolar satellite associated with the nucleolus. In the material fixed with 10% formalin and stained with cresyl violet, the nucleolar satellites showed in appearance the following five types: 1) a single satellite connecting with the nucleolus, 2) two satellites growing from the opposite sides of the nucleolus, 3) two satellites growing from the nucleolus without constant direction, 4) the satellites lying freely in the nucleus, 5) those adhering the inner surface of the nuclear membrane. Microscopical observations indicated that the occurrence of the nucleolar satellites was more frequent in the female cell than in the male cell. In every species under study the proportion of frequency in occurrence of the satellite in the temale calls to that of the male cells found to be approximately 2:1. The application of the Feulgen staining method failed to demonstrate the clear picture of the nucleolar satellites. In living cells observed with the aid of a phase contrast microscope, the nucleolar stellite was seen like an elengate process developing from the nucleolus. Though at present, nothing has been made clear as to the nature and origin of the nucleolar satellite here concerned, the author's view is that the nucleolar satellite plays a significant role in the metabolic activity for the functioning of cells, associated with the sexual difference.
- 1953-11-15