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Analysis of 13 C and 15 N CPMAS NMR‐spectra of soil organic matter and composts
Author(s) -
Almendros G.,
Fründ R.,
Gonzalez-Vila F.J.,
Haider K.M.,
Knicker H.,
Lüdemann H.-D.
Publication year - 1991
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(91)80458-f
Subject(s) - chemistry , fermentation , nmr spectra database , nitrogen , amide , organic matter , spectral line , dry matter , humic acid , carbon 13 nmr , nuclear magnetic resonance spectroscopy , nuclear chemistry , stereochemistry , organic chemistry , botany , fertilizer , biology , physics , astronomy
15 N and 13 C CPMAS spectra of composted plants are presented. The plants ( L. rigidium and Zea mays ) were grown in 15 N enriched medium and fennented for several months until an approx. 80% of the dry matter was lost. In all 15 N spectra the secondary amide/peptide peaks a 87 ppm contributes more than 80% of the total intensity. No new 15 N peaks are formed during the fermentation process. Older attempts to assign a significant fraction of humic acid nitrogen to heteroaromatic structures formed in the fermentation process are thus most probably wrong.