title: Antioxidant Properties of Water-Soluble Gum from Flaxseed Hulls.
abstract: Soluble flaxseed gum (SFG) was extracted from flax (Linum usitatissimum) hulls using hot water, and its functional groups and antioxidant properties were investigated using infrared spectroscopy and different antioxidant assays (2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS), reducing power capacity, and β-carotene bleaching inhibition assay), respectively. The antioxidant capacity of SFG showed interesting DPPH radical-scavenging capacity (IC50 SFG = 2.5 mg·mL(-1)), strong ABTS radical scavenging activity (% inhibition ABTS = 75.6% ± 2.6% at 40 mg·mL(-1)), high reducing power capacity (RPSFG = 5 mg·mL(-1)), and potent β-carotene bleaching inhibition activity (IC50 SFG = 10 mg·mL(-1)). All of the obtained results demonstrate the promising potential use of SFG in numerous industrial applications, and a way to valorize flaxseed hulls.
authors.affiliation: Enzyme Bioconversion Unit (UR13ES74), National School of Engineering, Sfax University, Sfax 3030, Tunisia. fatma.bouaziz22@yahoo.fr.
authors.forename: Fatma
authors.initials: F
authors.lastname: Bouaziz
authors.affiliation: Département de Génie des Procédés Industriels, Laboratoire Transformations Intégrées de la Matière Renouvelable (UTC/ESCOM, EA 4297 TIMR), Université de Technologie de Compiègne, Compiègne Cedex 60203, France. m.koubaa@escom.fr.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Koubaa
authors.affiliation: Faculty of Pharmacy, Universitat de València, Avda, Vicent Andrés Estellés, s/n 46100 Burjassot, València 46940, Spain. francisco.barba@uv.es.
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Barba
authors.affiliation: Burn and Wound Healing Research Center, Division of Food and Nutrition, Shiraz University of Medical Sciences, Shiraz 7198754361, Iran. falcon.roh@gmail.com.
authors.forename: Shahin
authors.initials: S
authors.lastname: Roohinejad
authors.affiliation: Enzyme Bioconversion Unit (UR13ES74), National School of Engineering, Sfax University, Sfax 3030, Tunisia. semia.chaabouni@enis.rnu.tn.|Common Service Unit of Bioreactor Coupled with an Ultrafilter, National School of Engineering, Sfax University, Sfax 3030, Tunisia. semia.chaabouni@enis.rnu.tn.
authors.forename: Semia Ellouz
authors.initials: SE
authors.lastname: Chaabouni
keywords: antioxidant properties; flax hull; flaxseed gum