title: Water-soluble polysaccharides from agro-industrial by-products: functional and biological properties.
abstract: Water-soluble polysaccharides were isolated from almond (AWSP) and pistachio (PWSP) juice processing by-products. Their chemical and physical characteristics were determined using NMR and Infrared spectroscopic analysis. The complexities of the spectra reflected the heterogeneity of these polysaccharides. The ACE inhibitory activities (IC50 AWSP=2.81mgmL(-1) and IC50 PWSP=2.59mgmL(-1)) and antioxidant properties of AWSP and PWSP were investigated based on the DPPH radical-scavenging capacity assay (IC50 AWSP=2.87mgmL(-1) and IC50 PWSP=1.61mgmL(-1)). Reducing power, β-carotene bleaching inhibition (IC50AWSP=4.46mgmL(-1) and IC50 PWSP=3.39mgmL(-1)), and ferrous chelating assays (IC50 AWSP=0.22mgmL(-1) and IC50 PWSP=0.19mgmL(-1)) were also performed. The findings revealed that water-soluble polysaccharides exhibited antioxidant and antihypertensive activities. AWSP and PWSP showed excellent interfacial concentration-dependent properties. Overall, the results suggested that both AWSP and PWSP are promising sources of natural antioxidants and ACE inhibitory agents and could, therefore, be used as alternative additives in food, pharmaceutical and cosmetic preparations.
authors.affiliation: Unité Enzymes et Bioconversion. National School of Engineering of Sfax, ENIS Soukra Km 3.5 Sfax 3000, PB 1173, Sfax, Tunisia. Electronic address: assaadsila@gmail.com.
authors.forename: Assaâd
authors.initials: A
authors.lastname: Sila
authors.affiliation: Unité Enzymes et Bioconversion. National School of Engineering of Sfax, ENIS Soukra Km 3.5 Sfax 3000, PB 1173, Sfax, Tunisia.
authors.forename: Nadia
authors.initials: N
authors.lastname: Bayar
authors.affiliation: Unité Enzymes et Bioconversion. National School of Engineering of Sfax, ENIS Soukra Km 3.5 Sfax 3000, PB 1173, Sfax, Tunisia.
authors.forename: Imen
authors.initials: I
authors.lastname: Ghazala
authors.affiliation: Unité Enzymes et Bioconversion. National School of Engineering of Sfax, ENIS Soukra Km 3.5 Sfax 3000, PB 1173, Sfax, Tunisia.
authors.forename: Ali
authors.initials: A
authors.lastname: Bougatef
authors.affiliation: Unité Enzymes et Bioconversion. National School of Engineering of Sfax, ENIS Soukra Km 3.5 Sfax 3000, PB 1173, Sfax, Tunisia.
authors.forename: Raoudha
authors.initials: R
authors.lastname: Ellouz-Ghorbel
authors.affiliation: Unité Enzymes et Bioconversion. National School of Engineering of Sfax, ENIS Soukra Km 3.5 Sfax 3000, PB 1173, Sfax, Tunisia.
authors.forename: Semia
authors.initials: S
authors.lastname: Ellouz-Chaabouni
mesh_terms: D000383:Agriculture; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000737:chemistry / Q000494:pharmacology; D000959:Antihypertensive Agents / Q000737:chemistry / Q000494:pharmacology; D000975:Antioxidants / Q000737:chemistry / Q000494:pharmacology; D001628:Beverages; D001713:Biphenyl Compounds / Q000737:chemistry; D007220:Industrial Waste; D007501:Iron / Q000737:chemistry; D010851:Picrates / Q000737:chemistry; D027927:Pistacia / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry* / Q000494:pharmacology*; D027861:Prunus / Q000737:chemistry; D012995:Solubility; D014867:Water / Q000737:chemistry*; D019207:beta Carotene / Q000737:chemistry
chemical_list: D000806:Angiotensin-Converting Enzyme Inhibitors; D000959:Antihypertensive Agents; D000975:Antioxidants; D001713:Biphenyl Compounds; D007220:Industrial Waste; D010851:Picrates; D011134:Polysaccharides; D019207:beta Carotene; D014867:Water; C004931:1,1-diphenyl-2-picrylhydrazyl; D007501:Iron
keywords: ACE inhibitory; Antioxidant properties; Functional properties; Water-soluble polysaccharides