HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Benzing-Purdie, L. Articles by Ripmeester, J. A. Search for Related Content PubMed Articles by Benzing-Purdie, L. Articles by Ripmeester, J. A. Agricola Articles by Benzing-Purdie, L. Articles by Ripmeester, J. A.

Melanoidins and Soil Organic Matter: Evidence of Strong Similarities Revealed by ¹³C CP-MAS NMR¹

ABSTRACT

Melanoidins of molecular weight higher than 12000 were synthesized by reaction of xylose with glycine (I), xylose with ammonium sulfate (III), and glucose with glycine (II) and compared with a well-humified fraction of an organic soil. Microanalytical data for all four substances were very similar. The CP-MAS spectra of the three melanoidins strongly resemble that of the organic soil fraction. Melanoidins (I) and (II), like the organic soil fraction, are highly aliphatic and have the same distribution of carbon types: aliphatic, carbons bonded to the electronegative atoms O and N, aromatic, carboxyl, and carbonyl. Acid hydrolysis of melanoidin (I) yielded no xylose and < 1% glycine, indicating that these starting components are not main constituents of the polymer. These findings not only add weight to Maillard's hypothesis, that melanoidin formation "may be at the origin of humic substances in nature," but allow us to suggest that some of the nitrogen in soil which is still unidentified may exist in melanoidin-type polymers.

¹ Contribution no. 1297 from the Chemistry and Biology Research Institute, Agriculture Canada, Ottawa, and Division of Chemistry, National Research Council, Ottawa.

² Research Scientist, Agriculture Canada, and Associate Research Officer, National Research Council Canada.

Received for publication February 3, 1982. Accepted for publication August 20, 1982.

This article has been cited by other articles:

				M. BOSETTO, P. ARFAIOLI, and O. L. PANTANI Study of the Maillard reaction products formed by glycine and D-glucose on different mineral substrates Clay Minerals, March 1, 2002; 37(1): 195 - 204. [Abstract] [Full Text] [PDF]