Masaru Ishikawa

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The present study deals with cytological observations, DNA and protein synthesis in artificially activated sea urchin eggs. The eggs were activated by means of Loeb's double treatment with butyric acid and hypertonic sea water. Most of the eggs ofHemicentrotus pulcherrimus divided when the chromosomes duplicated after formation of the first monaster and(More)
—Many countries around the world, including Japan, face three major issues associated with their aging societies: declining population caused by low birthrates, an increased proportion of seniors due to changes in the composition of the population, and an increasing number of single-person households because of family structure changes. To explore assistive(More)
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