A galactose-rich heteropolysaccharide extracted from “jaboticaba” (Plinia cauliflora) peels

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

“…This result is reinforced by the FTIR analysis (Figure 1), since the intensity of the bands at 1737 cm −1 and 1636 cm −1 , related to free and esterified carboxyl group, respectively, was very close (Santos et al, 2020). NMR analysis performed by Miranda et al, (2020) demonstrated the presence of signal in a low field at δ 173.7 ppm, confirming the presence of esterified and non-esterified carboxyl of uronic acid and signals related to the methyl ester (-OCH 3 ) assigned at δ 55.8 ppm and ethyl ester (--OCH 2 CH 3 ) at δ 19.5 ppm (Miranda et al, 2020).…”

“…To guarantee reproducibility of the extractions, the ripeness of the fruits was determined according to the standard methodology from the Association of Official Analytical Chemists AOAC methodologies (AOAC, 2010), and the sweetness was evaluated as described by the Instituto Adolfo Lutz (IAL, 2008). The fruits used in this work presented ripeness of 17.9, assuring the fruits were ripe (Miranda et al, 2020).…”

“…The fruits used in this work presented ripeness of 17.9, assuring the fruits were ripe (Miranda et al, 2020).…”

“…In a previous work (Miranda et al, 2020), GH was chemically characterized as a galactose-rich polysaccharide with a main chain of α (1 → 4) D-galactoside branched at carbon 3. In addition to galactose (67.21%), GH also presented 9.78% of β-D-arabinose (1 → 4,3), 15.78% of β-D-glucose (1 → 6), and 2.26% of α-L-rhamnose (1 → 3,4).…”

“…GC/MS and NMR studies showed that GH main chain consists of an α (1 → 4) galactoside containing 67.2% of galactose, and molecular mass near to 1.48 × 10 5 Da. Suspensions of GH behaved as Newtonian fluid and the absolute viscosity decreased in the presence of NaCl and CaCl 2 (Miranda et al, 2020).…”