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TitleValorization of Amaranth (Amaranthus cruentus) grain extracts for the development of alginate-based active films
Author(s)Coelho, Laylla Marques
Faria, C. I.
Madalena, Daniel Alexandre Silva
Genisheva, Zlatina Asenova
Martins, Joana T.
Vicente, A. A.
Pinheiro, A. C.
KeywordsActive films
Bio-based packaging
Physical properties
Antioxidant activity
Issue date7-Sep-2022
PublisherMultidisciplinary Digital Publishing Institute (MDPI)
CitationCoelho, L. M.; Faria, C. I.; Madalena, Daniel A.; Genisheva, Zlatina; Martins, Joana T.; Vicente, António A.; Pinheiro, Ana Cristina, Valorization of Amaranth (Amaranthus cruentus) Grain Extracts for the Development of Alginate-Based Active Films. Molecules, 27(18), 5798, 2022
Abstract(s)This research work investigates the development of alginate-based films incorporating phenolic compounds extracted from Amaranthus cruentus grain using different solvents. Alginate, glycerol, and amaranth grain phenolic compounds at various concentrations were used to produce the films. An experimental Central Composite Rotatable Design (CCRD) was used to evaluate the effect of these variables on different film’s properties, i.e., water vapor permeability, hydrophobicity, moisture content, solubility, thermal, mechanical, and optical properties. This study demonstrated that high phenolic compound content and antioxidant capacity were obtained from amaranth grain using ethanol as the extraction solvent. Alginate films incorporating amaranth phenolic compounds were successfully manufactured, and this study can be used to tailor the formulation of alginate films containing amaranth phenolic compounds, depending on their final food application. For example, less flexible but more resistant and water-soluble films can be produced by increasing the alginate concentration, which was confirmed by a Principal Component Analysis (PCA) and Partial Least Squares (PLS) analysis. This study showed that active alginate films with amaranth phenolic compounds can be tailored to be used as food packaging material with potential antioxidant activity.
Publisher version
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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