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- Title
Antioxidant and emulsifying properties of a galactose-rich heteropolysaccharide from Plinia cauliflora peels.
- Authors
Miranda, Bruna M.; Almeida, Viviane O.; Batista, Karla A.; Fernandes, Kátia F.; Silva, Flávio A.
- Abstract
In this study functional properties of a galactose-rich heteropolysaccharide (GH) were accessed. The bands of a galactose-rich polysaccharide were found in FTIR spectra, including those from the fingerprint region. GH was characterized as a dark-red material (L* 25.86 ± 0.75, a* 9.46 ± 1.01, b* 0.65 ± 0.14, Chroma 9.48 ± 1.02) with antioxidant activity of 21.5 ± 0.08, 12.1 ± 0.06 and 0.46 ± 0.04 mmol Trolox Eq/mg GH in FRAP, DPPH and ABTS, respectively. GH presented 44.9% of esterification degree and 10.73 ± 0. 01 mg of GAE/g. The production parameters of GH emulsions (GH concentration, time and ultrasound power) were optimized using a 23 Central Composite Rotatable Design (CCRD). Emulsion droplets presented particle size (d µm) varying from 0.823 ± 0.065 to 1.926 ± 0.151, polydispersity index (PDI) from 0.10 ± 0.05 to 0.40 ± 0.01 and zeta potential from −29.25 ± 3.98 to −33.75 ± 1.77. Finally, the high emulsifying activity (EA) (96.67%) and emulsion stability (ES) (97.44%) allow suggesting that GH is a promising polysaccharide for food applications.
- Subjects
ZETA potential; POLYSACCHARIDES; FRACTIONS; ANTIOXIDANTS; EMULSIONS; COLORIMETRY
- Publication
Food Science & Technology International, 2023, Vol 29, Issue 6, p586
- ISSN
1082-0132
- Publication type
Article
- DOI
10.1177/10820132221100684