Letter | Published:

Isolation of Anthraquinone from Humus

Naturevolume 191pages415416 (1961) | Download Citation

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Abstract

IT is now generally accepted that the skeletal part of humic acids consists of heteropolycondensates of various aromatic nuclei. This concept, however, has been deduced rather indirectly from physico-chemical data such as X-ray analysis, and benzene seems to be the sole aromatic ring identified by the method of organic chemistry1. Recently we found anthraquinone in the decarboxylation products of the water-soluble acid fraction obtained by the alkaline permanganate oxidation of humic acids.

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References

  1. 1

    Flaig, W., Landw. Forsch., 6 Sonderheft, 94 (1955).

  2. 2

    Kumada, K., Soil and Plant Food, Japan, 1, 29 (1955).

  3. 3

    Montgomery, R. S., and Holly, E. D., Fuel, 35, 49, 60 (1956).

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Author information

Affiliations

  1. Department of Agricultural Chemistry, Nagoya University, Anjo

    • KYOICHI KUMADA
    •  & AKIO SUZUKI
  2. Department of Agricultural Chemistry, University of Tokyo

    • KAZUYUKI AIZAWA

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https://doi.org/10.1038/191415b0

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