Structural, functional, and antioxidant properties of water-soluble polysaccharides from potatoes peels. (15th August 2016)

• Record Type: Journal Article
• Authors: Jeddou, Khawla Ben; Chaari, Fatma; Maktouf, Sameh; Nouri-Ellouz, Oumèma; Helbert, Claire Boisset; Ghorbel, Raoudha Ellouz
• Is Part Of: Food chemistry. Volume 205(2016)
• Page Start: 97
• Page End: 105
• Publication Date: 2016-08-15
• Subjects: Potato peels -- Water-soluble polysaccharides -- Functional properties -- Antioxidant activity; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2016.02.108
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Polysaccharides were extracted from potato peels with a yield of 29.85 ± 1.493%. The structure of PPPW was examined by FT-IR, XRD and GC–MS analysis. PPPW showed interesting water-holding and fat-binding capacities. PPPW composed by galactose (69.06%) as the dominant sugar. Polysaccharides from potato peels exhibited strong antioxidant activity in vitro . Abstract: Water-soluble polysaccharides were extracted from potato peel waste (PPW). The structure of the polysaccharides from PPW (PPPW) was examined by means of Fourier transform-infrared spectroscopy (FT-IR) analysis, X-ray diffractometry (XRD) and gas chromatography–mass spectrometry (GC–MS). The results suggest that the extracted polysaccharides form a semi-crystalline polymer constituted essentially of the functional groups CO, CH and OH. Acid hydrolysis of this polymer yielded glucose (76.25%) as the dominant sugar functional properties (water holding capacity: WHC, oil holding capacity: OHC, foaming, and emulsion properties) of this polymer were studied. The PPPW showed interesting water-holding and fat-binding capacities which were 4.097 ± 0.537 g/g and 4.398 ± 0.04 g/g, respectively. In addition, it presented good foaming and emulsion properties. The antioxidant activity of this polymer was also studied and revealed that the polysaccharides showed interesting 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging capacity (IC50 PPPW = 11.578 mg/mL), reducing power and β-carotene bleaching inhibition activities, and also a strong ABTS radical scavenging activity (IC50 PPPW = 2 mg/mL). Overall, the results suggest that the polysaccharide is a promising source of natural antioxidants and can be used as additive in food, pharmaceutical and cosmetic preparations.