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Apparent Vitamin C as a Possible Precursor of True Vitamin C in Walnuts

Nature volume 154, pages 669670 (25 November 1944) | Download Citation

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Abstract

UNRIPE walnuts have previously been reported1,2 to contain considerable amounts of apparent vitamin C, the provisional term suggested3 for substances which so closely resemble true vitamin C in chemical and physical properties that they may be confused with the latter when it is being estimated by the usual dye titration method, though they may be distinguished from it by modifications4,5 of Lugg's formaldehyde method6. A detailed study (on some hundreds of samples) has now been made of the relative proportions of true and apparent vitamin C in different tissues of the walnut throughout the period of growth and ripening.

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References

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Author information

Affiliations

  1. Ovaltine Research Laboratories, King's Langley, Herts.

    • FRANK WOKES
    • , JOAN G. ORGAN
    •  & EIRENE M. JAMES
  2. Royal Botanic Gardens, Kew. Oct. 20.

    • RONALD MELVILLE.

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DOI

https://doi.org/10.1038/154669b0

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