title: Flavor release in the presence of melanoidins prepared from L-(+)-ascorbic acid and amino acids.
abstract: High-molecular-weight (HMW) water-soluble melanoidins were prepared from model systems of L-(+)-ascorbic acid-glycine, L-(+)-ascorbic acid-lysine, L-(+)-ascorbic acid-glutamic acid, and glucose-glycine using a very recently approved standard protocol. The amount of HMW water-soluble melanoidins prepared from L-(+)-ascorbic acid was over 5-15 times higher than the amount obtained from glucose. The study of the release of a model flavor compound, namely isoamyl acetate, from melanoidins by solid-phase microextraction (SPME) showed that SPME is a suitable technique for the analysis of flavor release from melanoidin-containing solutions. From the studies on the retention capacity of the melanoidins toward isoamyl acetate, an increased release of the flavor compound was observed from the melanoidins prepared from the L-(+)-ascorbic acid-glycine model system, whereas the opposite effect was observed from the melanoidins prepared from the L-(+)-ascorbic acid-lysine/glutamic acid model systems. The melanoidins prepared from the glucose-glycine model system had the same effect as the melanoidins prepared from the L-(+)-ascorbic acid-glycine model system.
authors.affiliation: Department of Organic Chemistry, Higher Institute of Food and Flavor Industry, 26, Maritsa Boulevard, 4000 Plovdiv, Bulgaria.
authors.forename: Cvetan
authors.initials: C
authors.lastname: Obretenov
authors.forename: Jan
authors.initials: J
authors.lastname: Demyttenaere
authors.forename: Kourosch Abbaspour
authors.initials: KA
authors.lastname: Tehrani
authors.forename: An
authors.initials: A
authors.lastname: Adams
authors.forename: Milda
authors.initials: M
authors.lastname: Kersiene
authors.forename: Norbert
authors.initials: N
authors.lastname: De Kimpe
mesh_terms: D000596:Amino Acids / Q000737:chemistry*; D001205:Ascorbic Acid / Q000737:chemistry*; D003956:Dialysis; D005947:Glucose / Q000737:chemistry; D018698:Glutamic Acid / Q000737:chemistry; D005998:Glycine / Q000737:chemistry; D008239:Lysine / Q000737:chemistry; D008970:Molecular Weight; D000439:Pentanols / Q000737:chemistry; D011108:Polymers / Q000737:chemistry / Q000494:pharmacology*; D012995:Solubility
chemical_list: D000596:Amino Acids; D000439:Pentanols; D011108:Polymers; C011908:melanoidin polymers; D018698:Glutamic Acid; D005947:Glucose; D008239:Lysine; D001205:Ascorbic Acid; D005998:Glycine; C020377:isoamyl acetate