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Geochemical Journal
Geochemical Journal An open access journal for geochemistry
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Published for geochemistry community from Geochemical Society of Japan.

Electron spin resonance of sedimentary humic acids in relation to their aromatic character

Ryoshi Ishiwatari
Geochemical Journal, Vol. 8, No. 2, P. 97-102, 1974

ABSTRACT

ESR study of humic acids from lake and marine sediments was performed to obtain information on their aromatic structure. The g values of humic acids were found to be 2.0032∼2.0035. It seems likely that free radicals in them are semiquinone radicals in a condensed ring system having alicyclic rings or radicals of carbon and nitrogen in the molecule.

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