Antioxidant and emulsifying properties of a galactose-rich heteropolysaccharide from Plinia cauliflora peels

Bruna M. Miranda; Viviane O. Almeida; Karla A. Batista; Kátia F. Fernandes; Flávio A. Silva

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Antioxidant and emulsifying properties of a galactose-rich heteropolysaccharide from Plinia cauliflora peels

Bruna M. Miranda ^[1] ; Viviane O. Almeida ^[1] ; Karla A. Batista ^[1] ; Kátia F. Fernandes ^[1] ; Flávio A. Silva ^[1]
1. [1] Universidade Federal de Goiás
  
  Universidade Federal de Goiás
  
  Brasil
Localización: Food science and technology international = Ciencia y tecnología de alimentos internacional, ISSN-e 1532-1738, ISSN 1082-0132, Vol. 29, Nº 6, 2023, págs. 586-597
Idioma: inglés
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Resumen
- 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.