Improved antioxidant activity of a starch and gelatin-based biodegradable coating containing Tetradenia riparia extract

The incorporation of plant-based extracts into polymer-based coatings is an efficient alternative to increase the shelf-life of stored fruit and to decrease or even prevent bacterial growth. Considering strawberries, it is also important to preserve their high antioxidant activity. Hence, this work...

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Published inInternational journal of biological macromolecules Vol. 165; no. Pt A; pp. 1038 - 1046
Main Authors Friedrich, Jussara C.C., Silva, Otavio A., Faria, Maria G.I., Colauto, Nelson B., Gazzin, Zilda C., Colauto, Giani A.L., Caetano, Josiane, Dragunski, Douglas C.
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 15.12.2020
Subjects
Antimicrobial activity
Antioxidants - chemistry
Biodegradable film
Biodegradable Plastics - chemistry
Food Microbiology
Food Packaging
Food Preservation
Food Storage
Fragaria
Fruit - chemistry
Gelatin - chemistry
Humans
Lamiaceae - chemistry
Plant Extracts - chemistry
Plasticizer
Polysaccharide
Protein
Starch - chemistry
Strawberry
Antimicrobial activity
Plasticizer
Biodegradable film
Polysaccharide
Strawberry
Protein
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Summary:The incorporation of plant-based extracts into polymer-based coatings is an efficient alternative to increase the shelf-life of stored fruit and to decrease or even prevent bacterial growth. Considering strawberries, it is also important to preserve their high antioxidant activity. Hence, this work evaluated the efficiency of a coating based on native cassava starch (NCS), gelatin, and sorbitol, containing different concentrations of Tetradenia riparia extract, in delaying the ripening process of strawberries stored under refrigerated conditions, and in preventing bacterial growth and antioxidant activity losses. Both concentrations of extract (500 or 1000 μg mL−1) increased the thickness, opacity, and water vapor transmission rate (WVTR) of the films when compared to the film without extract, but decreased the solubility. Even though the film without extract was expected to create a more efficient barrier to the coated fruits, the films containing the extract led to similar results of soluble solids (SS), titratable acidity (TA), and vitamin C. Nevertheless, the extract incorporation improved the control over bacterial growth, and preserved the high antioxidant activity of the strawberries within ten days of storage.
ISSN:0141-8130
1879-0003
DOI:10.1016/j.ijbiomac.2020.09.143