title: Physicochemical properties and antioxidant activities of polysaccharides sequentially extracted from peony seed dreg.
abstract: The sequential extraction of peony seed dreg polysaccharides (PSDP) with hot buffer (HBSS), chelating agent (CHSS), dilute alkaline (DASS) and concentrated alkaline (CASS) yielded four different polysaccharide fractions. Based on their absorptions at 3600-3200cm(-1) and 1200-800cm(-1), these fractions were confirmed to be polysaccharides. The properties of four PSDPs displayed some slight differences. The CASS showed the highest peak temperature and endothermic enthalpy. The emulsifying activity and emulsifying stability of four PSDPs exhibited a dose-dependent pattern; HBSS showed the highest emulsifying activity, and CHSS displayed the longest emulsifying stability. The four PSDPs also exhibited wide variations in their antioxidant activities. For example, i) CASS showed the highest DPPH radical scavenging activity, reducing power and ABTS radical scavenging activity; ii) HBSS exhibited the highest hydroxyl radical scavenging activity, and iii) CHSS displayed the higher ferrous ions chelating ability than others.
authors.affiliation: School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
authors.forename: Jun-Jun
authors.initials: JJ
authors.lastname: Shi
authors.affiliation: School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
authors.forename: Jian-Guo
authors.initials: JG
authors.lastname: Zhang
authors.affiliation: School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
authors.forename: Yu-Han
authors.initials: YH
authors.lastname: Sun
authors.affiliation: School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Qu
authors.affiliation: School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China; School of life Science, Hefei Normal University, Hefei 230009, People's Republic of China.
authors.forename: Ling
authors.initials: L
authors.lastname: Li
authors.affiliation: Department of Nutrition and Food Sciences, Texas Woman's University, Denton, TX, USA.
authors.forename: Chandan
authors.initials: C
authors.lastname: Prasad
authors.affiliation: School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China; Agricultural and forestry specialty food processing industry technological innovation strategic alliance of Anhui province, Hefei 230009, People's Republic of China. Electronic address: zjwei@hfut.edu.cn.
authors.forename: Zhao-Jun
authors.initials: ZJ
authors.lastname: Wei
mesh_terms: D000975:Antioxidants / Q000737:chemistry* / Q000302:isolation & purification* / Q000494:pharmacology; D052160:Benzothiazoles / Q000737:chemistry; D001713:Biphenyl Compounds / Q000737:chemistry; D055598:Chemical Phenomena; D017665:Hydroxyl Radical / Q000737:chemistry; D010084:Oxidation-Reduction / Q000187:drug effects; D029596:Paeonia / Q000737:chemistry*; D010851:Picrates / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification* / Q000494:pharmacology; D012639:Seeds / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry; D013696:Temperature; D014867:Water / Q000737:chemistry
chemical_list: D000975:Antioxidants; D052160:Benzothiazoles; D001713:Biphenyl Compounds; D010851:Picrates; D011134:Polysaccharides; D013451:Sulfonic Acids; D014867:Water; C002502:2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; D017665:Hydroxyl Radical; C004931:1,1-diphenyl-2-picrylhydrazyl
keywords: Antioxidant activities; Peony seed dreg; Physicochemical properties; Polysaccharides; Sequential extraction