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Fate of (/sup 15/N)glycine in peat as determined by /sup 13/C and /sup 15/N CP-MAS NMR spectroscopy

Journal Article · · J. Agric. Food Chem.; (United States)
OSTI ID:5931458
; ; ; ; ;
Peat samples, nonsterile, sterilized by ..gamma.. irradiation or autoclaving, were incubated with (/sup 15/N)glycine for a period of 6 months. The /sup 13/C NMR data showed the established trend of increased humification with decreasing particle size and that autoclaving had significantly disturbed the humification-particle size distribution. The /sup 15/N CP-MAS NMR spectra showed the presence of (/sup 15/N)glycine in all fractions after incubation. /sup 15/NH/sub 4//sup +/, a result of either biological or chemical deamination, was one of the main products in the nonsterile peat series. The /sup 15/N spectra also showed resonances corresponding to amine, secondary amide, and pyrrole-type nitrogen and the presence of glycine derivatives and melanoidins. The results presented give the first spectroscopic evidence of the possible involvement of the Maillard reaction in the humification process.
Research Organization:
Agriculture Canada, Ottawa, Ontario
OSTI ID:
5931458
Journal Information:
J. Agric. Food Chem.; (United States), Journal Name: J. Agric. Food Chem.; (United States) Vol. 34:2; ISSN JAFCA
Country of Publication:
United States
Language:
English

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Related Subjects

553001* -- Agriculture & Food Technology-- Tracer Techniques-- (-1987)
60 APPLIED LIFE SCIENCES
AMINO ACIDS
AMMONIUM COMPOUNDS
CARBON 13
CARBON ISOTOPES
CARBOXYLIC ACIDS
CHEMISTRY
ELECTROMAGNETIC RADIATION
ENERGY SOURCES
EVEN-ODD NUCLEI
FOSSIL FUELS
FUELS
GAMMA RADIATION
GLYCINE
HUMUS
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
NITROGEN 15
NITROGEN ISOTOPES
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ODD-EVEN NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC MATTER
PEAT
RADIATIONS
RADIOSTERILIZATION
RESONANCE
SOIL CHEMISTRY
SPECTRA
STABLE ISOTOPES
STERILIZATION