Letter | Published:

Vitamin C in Walnuts

Nature volume 150, pages 267268 (29 August 1942) | Download Citation

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Abstract

THE fact that unripe walnuts (Juglans regia) contain very large amounts of vitamin C appears to have been first reported by Gergelezhiu1 in 1937. This remarkable observation that a fruit as large as the walnut contains 1,000–3,000 mgm. of vitamin C per 100 gm. appears to have been overlooked in English-speaking countries although the findings have since been confirmed by German workers2. It has been shown by the Russian author that the vitamin C content is at its highest at the stage of development when the kernel is soft and just before the formation of the shell.

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References

  1. 1.

    , Bull. App. Bot., Genetics, Plant Breeding, U.S.S.R., Supp. 84, 2, 206 (1937); Konservnaya Prom., 4, 15 (1938); C. R. Acad. Sci., U.S.S.R., 21, 246 (1938); Khim. Referat. Zhur, 2, No. 1, 50 (1939).

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    and , Biochem. Z., 306, 16 (1940).

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    and , Biochem. J., 36, 155 (1942).

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    and , Z. physiol. Chem., 263, 37 (1940).

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    and , Biochem. J., 35, 761 (1941).

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Author information

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  1. Aug. 5.

    • MAGNUS PYKE
    • , RONALD MELVILLE
    •  & HENRY SARSON

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DOI

https://doi.org/10.1038/150267b0

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