title: Extraction, characterization and spontaneous emulsifying properties of pectin from sugar beet pulp.
abstract: The effects of organic acid extractants on the yield and characteristics of pectin from sugar beet pulp were investigated with citric acid, malic acid and lactic acid at different pH (1.5 and 2.0) and time (1 h and 2 h). The results demonstrated that the yields of pectins were directly correlated with the decrease of pH and reaction time, and the optimum yield of 17.2% was obtained at pH 1.5 and 2 h. Furthermore, the acid type also affected the physicochemical characteristics of pectin, especially on the esterification degree (42-71), galacturonic acid content (60.2-77.8%), emulsion activity (35.2-40.1%) and emulsion stability (62.1-79.4%), and a relatively single pectin mainly consisted of homogalacturonan could be obtained under a suitable reaction condition, which was an excellent crude material for the production of emulsion activity.
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China. sen.masson@hotmail.com
authors.forename: Sen
authors.initials: S
authors.lastname: Ma
authors.forename: Shu-juan
authors.initials: SJ
authors.lastname: Yu
authors.forename: Xue-ling
authors.initials: XL
authors.lastname: Zheng
authors.forename: Xiao-xi
authors.initials: XX
authors.lastname: Wang
authors.forename: Qing-Dan
authors.initials: QD
authors.lastname: Bao
authors.forename: Xiao-ming
authors.initials: XM
authors.lastname: Guo
mesh_terms: D027461:Beta vulgaris / Q000737:chemistry*; D002264:Carboxylic Acids / Q000737:chemistry; D004655:Emulsions; D004951:Esterification; D010368:Pectins / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D002264:Carboxylic Acids; D004655:Emulsions; D010368:Pectins
keywords: Biochemical characteristics; Emulsifying properties; Organic acid; Pectin; Sugar beet pulp