| ANTIOXIDANT ACTIVITY AND DIFFUSION OF CATECHIN AND EPICATECHIN FROM ANTIOXIDANT ACTIVE FILMS MADE OF POLY(L-LACTIC ACID). | |
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MedLine Citation:
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PMID: 22681400 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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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. |
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Authors:
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Fabiola Iñiguez-Franco; Herlinda Soto-Valdez; Elizabeth Peralta; J Fernando Ayala-Zavala; Rafael Auras; Nohemí Gámez-Meza |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-6-8 |
Journal Detail:
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Title: Journal of agricultural and food chemistry Volume: - ISSN: 1520-5118 ISO Abbreviation: - Publication Date: 2012 Jun |
Date Detail:
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Created Date: 2012-6-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0374755 Medline TA: J Agric Food Chem Country: - |
Other Details:
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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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