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- W4243858638 abstract "Cross sectional distribution of metals such as; Ca, Mg, K, and Na in the tissues of the fronds of both tangle, Laminaria japonica, and wakame, Undaria pinnatifida, were examined with electron microprobe analyzer (EPMA). These metals were also chemically analyzed, and the composition of stuctural polysaccharides, mainly alginic acid, was examined for both cortex and cetral tissues obatined by scraping off the fronds of tangle. 1) In the observation with EPMA, the Na, K, and Mg contents were higher in central tissues than in the cortex, whereas, regarding Ca content no difference was found in either tissues. In the chemical analysis of the metals in both water soluble and insoluble polysaccharides fractions of the fronds of tangle, almost the same results were obtained as above except the Ca content was evidently higher in cortex than in cetral tissues. 2) The dominant polysaccharides was alginate in both tissues, the polysaccharides other than alginte, fucoidan and laminaran, were higher in cortex than in central tissues, In addition, water insoluble alginate of the cortex was rich in guluronic acid, although that of central tissues was rich in mannuronic acid. Both matters mentioned above may be concerned with physical properties of the fronds of tangle, such as, either the failure to decompose or the ease of decomposition by boiling." @default.
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- W4243858638 date "1980-01-01" @default.
- W4243858638 modified "2023-10-16" @default.
- W4243858638 doi "https://doi.org/10.2331/suisan.46.749" @default.
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