Intelligent and active furcellaran-gelatin films containing green or pu-erh tea extracts: Characterization, antioxidant and antimicrobial potential

Ewelina Jamróz , Piotr Kulawik , Paweł Krzyściak , Katarzyna Talaga-Ćwiertnia , Lesław Juszczak

Abstract

Biodegradable films from furcellaran and gelatin (FUR/GEL) with pu-erh (RTE) and green tea (GTE) water extracts (TEs) were obtained by a casting method. The films were examined in terms of physical properties (thickness, density, water solubility, water content, degree of swelling, color), antioxidant properties (DPPH, ABTS, TPC), antimicrobial properties (Escherichia coli, Staphylococcus aureus, Candida albicans and Henseniaspora uvarum) and mechanical properties (tensile strength, elongation at break). The values of tensile strength (TS) increased from 9.62 to 24.14 or 13.59 MPa after GTE or RTE incorporation, respectively. Parameters of elongation at break were not changed. Higher color parameters: a*, b* and ∆E were observed in biocomposite films with RTE. The FUR/GEL films with GTE and RTE can be used for intelligent food packaging, due to their sensibility of pH changes. Possible interaction between the film matrix and TEs was confirmed using FTIR. The antioxidant properties were significantly enhanced with increasing GTE and RTE concentration reaching 43.92 and 48.94% of DPPH and 15.76 and 14.98% of ABTS radical inhibition, respectively. The microbiological analysis confirmed antimicrobial properties of FUR/GEL with GTE against E.coli and S. aureus (inhibition zones of 16 and 22.5 mm, respectively).
Author Ewelina Jamróz (FoFT / IoCh)
Ewelina Jamróz,,
- Institute of chemistry
, Piotr Kulawik (FoFT / DoAPT)
Piotr Kulawik,,
- Department of Animal Product Technology
, Paweł Krzyściak
Paweł Krzyściak,,
-
, Katarzyna Talaga-Ćwiertnia
Katarzyna Talaga-Ćwiertnia,,
-
, Lesław Juszczak (FoFT / DoFAaQA)
Lesław Juszczak,,
- Department of Food Analysis and Quality Assessment
Journal seriesInternational Journal of Biological Macromolecules, ISSN 0141-8130, e-ISSN 1879-0003, (N/A 100 pkt)
Issue year2019
Vol122
Pages745-757
Publication size in sheets0.6
Keywords in EnglishFurcellaran, Gelatin, Edible films
ASJC Classification2700 General Medicine; 1303 Biochemistry; 1312 Molecular Biology; 1315 Structural Biology
DOIDOI:10.1016/j.ijbiomac.2018.11.008
URL https://www.sciencedirect.com/science/article/pii/S0141813018349675/pdfft?md5=d88f903ff9af1edb25e6a3783889e29a&pid=1-s2.0-S0141813018349675-main.pdf
Internal identifierWTŻ/2019/7
Languageen angielski
Score (nominal)100
Score sourcejournalList
Publication indicators WoS Citations = 8; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.457; WoS Impact Factor: 2018 = 4.784 (2) - 2018=4.731 (5)
Citation count*
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FinansowaniePart of the research was supported by research grant no. BM-4742/KPPZ/17 from the University of Agriculture in Cracow.
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