Document Detail


Model studies on chemical and textural modifications in gelatin films by reaction with glyoxal and glycolaldehyde.
MedLine Citation:
PMID:  20232905     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The present study investigated chemically modified gelatin biopolymer films. Gelatin solutions were treated with glyoxal and glycolaldehyde, respectively, at concentrations ranging from 0.25 to 7.5 wt % based on gelatin. From these solutions, films were produced under defined conditions and characterized with different chemical and physical methods. N(epsilon)-carboxymethyllysine (CML), glyoxal-derived lysine dimer (GOLD), and 5-(2-imino-5-oxo-1-imidazolidinyl)norvaline (imidazolinone) were analyzed as chemical parameters for protein modification by reversed-phase high-performance liquid chromatography (RP-HPLC) and fluorescence detection after post-column o-phthaldialdehyde derivatization. An increase in the content of these substances with increasing concentrations of carbonyl modifiers correlated with the loss of available free lysine and arginine residues. Swelling, solubility, and mechanical properties (Young's modulus, stress and strain at break) showed the relationship with the degree of monovalent modification and cross-linking as well. The determination of unreacted glyoxal and glycolaldehyde suggested a different mechanism of cross-linking induced by glyoxal versus glycolaldehyde as reactive intermediates in Maillard chemistry.
Authors:
Robert Spanneberg; Franziska Osswald; Igor Kolesov; Werner Anton; Hans-Joachim Radusch; Marcus A Glomb
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  58     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-03-17     Completed Date:  2010-07-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3580-5     Citation Subset:  IM    
Affiliation:
Institute of Chemistry, Food Chemistry, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Strasse 2, Halle/Saale, Germany.
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MeSH Terms
Descriptor/Qualifier:
Acetaldehyde / analogs & derivatives*,  chemistry
Gelatin / chemistry*
Glyoxal / chemistry*
Models, Chemical
Chemical
Reg. No./Substance:
107-22-2/Glyoxal; 141-46-8/glycolaldehyde; 75-07-0/Acetaldehyde; 9000-70-8/Gelatin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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