Abstract
Proton magnetic resonance estimations of
the fraction of protons attached directly to aromatic nuclei in some lignin
preparations from Pinus radiata and Eucalyptus regnans indicate that aromatic
rings are present in the form of condensed structures. These results are in
agreement with other data on condensed structures in lignins. Other features of
p.m.r. spectra of the above materials are discussed.
Cited by
22 articles.
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