title: Structural, functional, and antioxidant properties of water-soluble polysaccharides from potatoes peels.
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=2mg/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.
authors.affiliation: Université de Sfax, ENIS, Unité Enzymes et Bioconversion, Route de Soukra km 4, BP 1173, 3038 Sfax, Tunisia.
authors.forename: Khawla Ben
authors.initials: KB
authors.lastname: Jeddou
authors.affiliation: Université de Sfax, ENIS, Unité Enzymes et Bioconversion, Route de Soukra km 4, BP 1173, 3038 Sfax, Tunisia. Electronic address: c.fatma@yahoo.fr.
authors.forename: Fatma
authors.initials: F
authors.lastname: Chaari
authors.affiliation: Institue de l'olivier, laboratoire d'amélioration de la productivité de l'olivier et la qualité du produit, Tunisia.
authors.forename: Sameh
authors.initials: S
authors.lastname: Maktouf
authors.affiliation: Université de Sfax, ENIS, Laboratoire des Biotechnologies Végétales Appliquées à L'Amélioration des Cultures, Route Soukra km 4, BP 1173, 3038 Sfax, Tunisia.
authors.forename: Oumèma
authors.initials: O
authors.lastname: Nouri-Ellouz
authors.affiliation: Service de Chromatographie Purification et analyse de polysaccharides CERMAV-CNRS, 601 rue de la Chimie, 38041 Grenoble cedex 9, France.
authors.forename: Claire Boisset
authors.initials: CB
authors.lastname: Helbert
authors.affiliation: Université de Sfax, ENIS, Unité Enzymes et Bioconversion, Route de Soukra km 4, BP 1173, 3038 Sfax, Tunisia; Université de Sfax, ENIS, Unité de Service Bioréacteur couplé à un ultrafiltre, Route de Soukra km 4, BP 1173, 3038 Sfax, Tunisia.
authors.forename: Raoudha Ellouz
authors.initials: RE
authors.lastname: Ghorbel
mesh_terms: D000975:Antioxidants / Q000032:analysis* / Q000737:chemistry / Q000494:pharmacology; D052160:Benzothiazoles / Q000737:chemistry; D001713:Biphenyl Compounds / Q000737:chemistry; D004040:Dietary Carbohydrates / Q000032:analysis / Q000494:pharmacology; D004655:Emulsions; D008401:Gas Chromatography-Mass Spectrometry; D010084:Oxidation-Reduction; D010851:Picrates / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry*; D011134:Polysaccharides / Q000032:analysis* / Q000737:chemistry / Q000494:pharmacology; D011198:Solanum tuberosum / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013451:Sulfonic Acids / Q000737:chemistry; D014867:Water / Q000737:chemistry*; D019207:beta Carotene / Q000737:chemistry
chemical_list: D000975:Antioxidants; D052160:Benzothiazoles; D001713:Biphenyl Compounds; D004040:Dietary Carbohydrates; D004655:Emulsions; D010851:Picrates; D011134:Polysaccharides; D013451:Sulfonic Acids; D019207:beta Carotene; D014867:Water; C002502:2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; C004931:1,1-diphenyl-2-picrylhydrazyl
keywords: Antioxidant activity; Functional properties; Potato peels; Water-soluble polysaccharides