Letter | Published:

Hydrojuglone and Apparent Vitamin C in Walnuts

Nature volume 162, pages 179180 (31 July 1948) | Download Citation

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Abstract

PREVIOUS communications from these laboratories1–4 have shown that associated with the remarkably high concentrations of true vitamin C in different tissues of the walnut (Juglans regia) and allied species are considerable amounts of non-specific dye reductants provisionally termed5 ‘apparent vitamin C'. The proportion of apparent vitamin C in the total dye reductants varies from less than 5 per cent in the endocarp to more than 90 per cent in resting buds and catkins. We have now obtained evidence that this so-called apparent vitamin C in walnuts is mainly, if not entirely, a derivative of hydrojuglone or 1 : 4 : 5 trihydroxynaphthalene :

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Affiliations

  1. Ovaltine Research Laboratories, King‘s Langley, Herts. April 23.

    • C. DAGLISH
    •  & FRANK WOKES

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DOI

https://doi.org/10.1038/162179a0

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