Title: Preparation, structural characteristics and antioxidant activity of polysaccharide and its metal chelates from the peel of Dioscorea oppositifolia L.
Authors: Liu, Yi; Niu, Chao-Fei; Wang, Yi; Ruan, Yuan; Wang, Li; Li, Hui; Ma, Bing-Ji
Abstract: Two metal chelates of Dioscorea oppositifolia L. peel polysaccharides (DTP) were prepared: iron chelate (DTP-Fe) and zinc chelate (DTP-Zn). The physicochemical properties of the polysaccharide and its metal chelates were assessed by UV-Vis absorption spectroscopy, Fourier-transform infra-red spectroscopy, scanning electron microscopy, and thermogravimetric analysis. Antioxidant activities were evaluated by DPPH, ABTS + and hydroxyl radical scavenging assays. According to ICP-MS, the iron content of DTP-Fe was 9.47%, while the zinc content of DTP-Zn was 4.02%. The antioxidant capacity of DTP-Fe increased with the increase of concentration, and its overall activity was higher than that of DTP and DTP-Zn. This polysaccharide-iron chelate can be developed and utilised as an antioxidant and multifunctional iron supplement. DTP-Zn showed the potential to be a natural antioxidant and zinc supplement food.
Subjects: IRON chelates; ZINC supplements; DIETARY supplements; POLYSACCHARIDES; HYDROXYL group
Publication: Natural Product Research, 2025, Vol 39, Issue 1, p119
ISSN: 1478-6419
Publication type: Academic Journal
DOI: 10.1080/14786419.2023.2255917

Preparation, structural characteristics and antioxidant activity of polysaccharide and its metal chelates from the peel of Dioscorea oppositifolia L.

Liu, Yi; Niu, Chao-Fei; Wang, Yi; Ruan, Yuan; Wang, Li; Li, Hui; Ma, Bing-Ji