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Biodegradable Films with Polysaccharides, Proteins, and Bioactive Compounds from Lobosphaera sp.: Antioxidant and
Valter F R Martins1, Ana I Lopes1, Manuela Machado1
1CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho, 1327, 4169-005 Porto, Portugal.
Foods (Basel, Switzerland)
|April 26, 2025
Summary
Biodegradable films were created from the microalga Lobosphaera sp., incorporating bioactive compounds for enhanced antioxidant and antimicrobial properties. These sustainable films show potential for food preservation applications.
Area of Science:
- Biotechnology
- Materials Science
- Food Science
Background:
- Microalgae offer a sustainable source of bioactive compounds, avoiding competition with agricultural land.
- Lobosphaera sp. was investigated for its potential in producing functional biodegradable films.
Purpose of the Study:
- To develop and characterize biodegradable films incorporating extracts from Lobosphaera sp.
- To evaluate the antioxidant, antimicrobial, and physical properties of these novel films.
Main Methods:
- Extraction of bioactive compounds, polysaccharides, and proteins from Lobosphaera sp.
- Characterization of extracts (TPC, antioxidant activity, phenolic/lipid composition, cytotoxicity).
- Fabrication and testing of alginate-based films with varying microalgal extracts (antioxidant activity, physical properties, antimicrobial efficacy).
Main Results:
- Bioactive-rich extract exhibited significant antioxidant activity (ABTS, DPPH, ORAC) and no cytotoxicity to gut cells.
- Films enriched with bioactive-rich extract demonstrated potent antioxidant and antimicrobial activity against Listeria monocytogenes.
- These films effectively controlled mold and yeast growth on strawberries during storage.
Conclusions:
- Biodegradable films can be successfully produced from Lobosphaera sp. with valuable bioactive properties.
- The developed films possess good antioxidant and antimicrobial characteristics, suitable for food preservation.
- Microalgal-based films represent a promising sustainable alternative for packaging applications.
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