caa a22 4500 445384409 CHVBK 20180317143027.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10924-010-0268-y doi (NATIONALLICENCE)springer-10.1007/s10924-010-0268-y Characterization of Chemically Modified Potato Starch Films Through Enzymatic Degradation [Elektronische Daten] [J. Morán, V. Cyras, A. Vázquez, M. Foresti] The present investigation was undertaken to characterize the biodegradation pattern of chemically modified starch films. Chemically modified starch films obtained by esterification of the hydroxyl groups of the polysaccharide have shown lower water sorption than native starch films, being therefore more attractive for a number of processing applications. However, no systematic study characterizing their biodegradation behavior and comparing it with the degradation pattern of native starch films has still been published. In the current contribution we characterized the enzymatic degradation pattern of three derivatized starch films by use of a commercial α-amylase from Bacillus licheniformis. Optimum degradation conditions were chosen upon assaying the effect of enzyme load and temperature on the reaction course of native starch films. Under the conditions selected, comparison of different derivatization procedures revealed that the starch film modified with octanoyl chloride was enzymatically hydrolyzed at a much higher rate than native starch film. Maleated starch films also showed higher susceptibility to α-amylolytic hydrolysis than native starch, whereas acetylated starch showed a hydrolysis pattern similar to that of native starch. Differences in degradation rates of chemically modified films were explained in terms of their amylose content which promotes dense networks that hinder the access of starch-degrading enzymes. Springer Science+Business Media, LLC, 2010 Starch films nationallicence Chemical modification nationallicence Enzymatic degradation nationallicence α-amylase nationallicence Amylose content nationallicence Morán J. Institute of Material Science and Technology (INTEMA), University of Mar del Plata, National Research Council (CONICET), Av. Juan B. Justo 4302 (B7608FDQ), Mar del Plata, Argentina aut Cyras V. Institute of Material Science and Technology (INTEMA), University of Mar del Plata, National Research Council (CONICET), Av. Juan B. Justo 4302 (B7608FDQ), Mar del Plata, Argentina aut Vázquez A. Polymer and Composite Material Group, Institute of Engineering in Technology and Science (INTECIN), Engineering Faculty, University of Buenos Aires, National Research Council (CONICET), Las Heras 2214 (C1127AAR), Buenos Aires, Argentina aut Foresti M. Polymer and Composite Material Group, Institute of Engineering in Technology and Science (INTECIN), Engineering Faculty, University of Buenos Aires, National Research Council (CONICET), Las Heras 2214 (C1127AAR), Buenos Aires, Argentina aut Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/1(2011-03-01), 217-224 1566-2543 19:1<217 2011 19 10924 https://doi.org/10.1007/s10924-010-0268-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10924-010-0268-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Morán J. Institute of Material Science and Technology (INTEMA), University of Mar del Plata, National Research Council (CONICET), Av. Juan B. Justo 4302 (B7608FDQ), Mar del Plata, Argentina aut NATIONALLICENCE 700 1- Cyras V. Institute of Material Science and Technology (INTEMA), University of Mar del Plata, National Research Council (CONICET), Av. Juan B. Justo 4302 (B7608FDQ), Mar del Plata, Argentina aut NATIONALLICENCE 700 1- Vázquez A. Polymer and Composite Material Group, Institute of Engineering in Technology and Science (INTECIN), Engineering Faculty, University of Buenos Aires, National Research Council (CONICET), Las Heras 2214 (C1127AAR), Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Foresti M. Polymer and Composite Material Group, Institute of Engineering in Technology and Science (INTECIN), Engineering Faculty, University of Buenos Aires, National Research Council (CONICET), Las Heras 2214 (C1127AAR), Buenos Aires, Argentina aut NATIONALLICENCE 773 0- Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/1(2011-03-01), 217-224 1566-2543 19:1<217 2011 19 10924 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer