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ANTIOXIDANT ACTIVITY AND DIFFUSION OF CATECHIN AND EPICATECHIN FROM ANTIOXIDANT ACTIVE FILMS MADE OF POLY(L-LACTIC ACID).
MedLine Citation:
PMID:  22681400     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Active membranes and food packaging containing antioxidants like catechin and epicatechin, combined to the use of materials made of biopolymers obtained from renewable sources, could create a novel alternative to reduce oxidation in food, pharmaceutical and cosmetic products. Poly(94% L-lactic acid) films containing 1.28% catechin and 1.50% epicatechin were extruded in a pilot-plant scale extrusion machine. The diffusion kinetics of catechin and epicatechin into 95% ethanol at 20, 30, 40 and 50 ºC and 50% ethanol at 40 °C displayed Fickian release behavior and diffusion coefficients between 0.5 and 50 x 10(-11)cm(2)/s. According to the Arrhenius equation, the energy of activation for the diffusion of catechin and epicatechin in the films was 110.43 and 98.92 kJ/mol, respectively. The antioxidant activity of the films was measured in methanol extracts containing 46.42 µg/mL of catechin and 57.52 µg/mL of epicatechin as 32.90 and 36.68 % of scavenging the 2,2 diphenyl-1-picrylhydrazyl (DPPH) radical, respectively.
Authors:
Fabiola Iñiguez-Franco; Herlinda Soto-Valdez; Elizabeth Peralta; J Fernando Ayala-Zavala; Rafael Auras; Nohemí Gámez-Meza
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-8
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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