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- W1965773143 abstract "In most starch-forming plants the starch grains are deposited in the plastids. The work of both early and recent investigators shows, however, that this is probably never true for the red algae. In this group of plants the grains are described as being formed in the cytoplasm, outside the plastids and often apparently quite independent of them. In the red algae the grains, which resemble the starch grains of higher plants, do not usually give the customary blue color when treated with iodine or zinc chloriodide. In a few species, for example Lorencia sp., Polysiphonia nigrescens, and Ceramium tenuissimum,' the color with iodine varies from violet to almost blue, but in most species it ranges from light brown to wine red. There is such a wide divergence of reaction in the different forms tested that OLTMANNS2 suggests the possibility that each species will be found to give its own characteristic color reaction. SAIKI3 found that by applying strong solutions of malt extract to commercial food preparations made from various red algae, such as Gelidium sp., Porphyra sp., and Chondrus crispus, no digestion whatever of the carbohydrates took place. From this and other experiments he concludes that the polysaccharid carbohydrates in these algal food preparations are not readily transformed into sugar by carbohydrate-digesting enzymes of animal origin, and scarcely more so by vegetable enzymes or bacteria. K6NIG and BETTELS4 hydrolyzed, with acids, the carbohydrates in Porphyra sp., Gelidium sp., and commercial compounds com-" @default.
- W1965773143 created "2016-06-24" @default.
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- W1965773143 date "1914-02-01" @default.
- W1965773143 modified "2023-09-26" @default.
- W1965773143 title "Concerning the Presence of Diastase in Certain Red Algae" @default.
- W1965773143 doi "https://doi.org/10.1086/331236" @default.
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