Abstract
WE have previously given evidence1,2 to show that cabbage contains ascorbic acid in a combined form from which ascorbic acid is released on heating. Chloroform extracts of dried cabbage, which were quite free from ascorbic acid as shown by the indophenol indicator, developed a marked dye-reducing value on heating. Treatment of cabbage with hydrogen sulphide in the hot and cold conditions also led to the same conclusion. Further, it was found by treatment with ascorbic acid oxidase, that 60–70 per cent of the indophenol reducing value of the chloroform extract of cabbage is to be attributed to combined ascorbic acid3. This work showed incidentally that, apart from combined ascorbic acid, which we called ‘ascorbigen’4, cabbage contains some non-specific reducing substance also in a combined form.
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References
Guha and Pal, NATURE, 137, 946 (1936).
Guha and Pal, NATURE, 139, 844 (1937).
Guha and Sen-Gupta, Science and Culture, 3, 59 (1937).
Pal and Guha, Proc. Biochem. Soc., Calcutta, 3, 8 (1936–37).
Reedman and McHenry, Biochem. J., 32, 85 (1938).
Scarborough and Stewart, Biochem. J., 31, 2232 (1937).
Guha and Sen-Gupta, J. Indian Chem., Soc., 14, 95 (1937).
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GUHA, B., SEN-GUPTA, P. Ascorbigen in Plant and Animal Tissues. Nature 141, 974 (1938). https://doi.org/10.1038/141974a0
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DOI: https://doi.org/10.1038/141974a0
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