The formation and clay mineral reactions of melanoidins Export

@article{Hedges1978, abstract = {Sugars and amino acids condense readily to form polymers known as melanoidins that closely resemble natural humic substances. In this study melanoidins are formed by reacting glucose with each of three amino acids: glutamic acid, valine and lysine. The basic amino acid, lysine, reacts with glucose at a much greater rate than either of the other two compounds. The chemical properties of the melanoidins are strongly influenced by the amino acid from which they are formed. The nitrogen contents, acidities and electrophoretic behavior of the polymers all reflect functional group distributions inherited from the amino acids. These chemical differences strongly influence the extent of association of the melanoidins with kaolinite and montmorillonite clay minerals. Laboratory simulations suggest that melanoidin formation may be favored in marine environments where basic amino acids should preferentially condense with sugars to form nitrogen-rich polymers that have a great affinity for clay mineral surfaces.}, author = {Hedges, J.}, citeulike-article-id = {3687160}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/0016-7037(78)90218-1}, citeulike-linkout-1 = {http://linkinghub.elsevier.com/retrieve/pii/0016-7037(78)90218-1}, doi = {10.1016/0016-7037(78)90218-1}, issn = {00167037}, journal = {Geochimica et Cosmochimica Acta}, keywords = {acid, amino, formation, geopolymer, kerogen, melanoids, sugars}, month = {January}, number = {1}, pages = {69--76}, posted-at = {2008-11-25 14:28:10}, priority = {2}, title = {The formation and clay mineral reactions of melanoidins}, url = {http://dx.doi.org/10.1016/0016-7037(78)90218-1}, volume = {42}, year = {1978} }

TY - JOUR ID - Hedges1978 L3 - citeulike-article-id:3687160 N2 - Sugars and amino acids condense readily to form polymers known as melanoidins that closely resemble natural humic substances. In this study melanoidins are formed by reacting glucose with each of three amino acids: glutamic acid, valine and lysine. The basic amino acid, lysine, reacts with glucose at a much greater rate than either of the other two compounds. The chemical properties of the melanoidins are strongly influenced by the amino acid from which they are formed. The nitrogen contents, acidities and electrophoretic behavior of the polymers all reflect functional group distributions inherited from the amino acids. These chemical differences strongly influence the extent of association of the melanoidins with kaolinite and montmorillonite clay minerals. Laboratory simulations suggest that melanoidin formation may be favored in marine environments where basic amino acids should preferentially condense with sugars to form nitrogen-rich polymers that have a great affinity for clay mineral surfaces. IS - 1 JF - Geochimica et Cosmochimica Acta SN - 00167037 EP - 76 TI - The formation and clay mineral reactions of melanoidins VL - 42 SP - 69 KW - acid KW - amino KW - formation KW - geopolymer KW - kerogen KW - melanoids KW - sugars AU - Hedges, J PY - 1978/01// UR - http://dx.doi.org/10.1016/0016-7037(78)90218-1 ER -