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Chemical structure of terrestrial humus materials formed from different vegetation characterized by solid‐state 13 C NMR with CP‐MAS techniques
Author(s) -
VN M. KROSSH A,
BJORGUM J. O.,
KRANE J.,
STEINNES E.
Publication year - 1990
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1990.tb00072.x
Subject(s) - humus , chemistry , solid state nuclear magnetic resonance , dephasing , magic angle spinning , magic angle , solid state , nuclear magnetic resonance spectroscopy , organic chemistry , soil water , nuclear magnetic resonance , geology , soil science , physics , quantum mechanics
SUMMARY Eleven samples of terrestrial humus from different vegetational backgrounds were examined with solid‐state 13 C NMR using cross‐polarization and magic‐angle spinning (CP‐MAS). In addition, all the samples were run with a dipolar dephasing pulse sequence for non‐quarternary carbon suppression (NQS). The humus samples all appeared to contain small amounts of aromatic substances and larger amounts of aliphatic compounds. Most of the samples contained considerable amounts of hydroxyl groups and acetals, which originate mainly from carbohydrates. No correlations were found between vegetational background and chemical structure.