title: Molecular Structural Characteristics of Polysaccharide Fractions from Canarium album (Lour.) Raeusch and Their Antioxidant Activities.
abstract: The objective of this study was to investigate the multiple relations between the preliminary molecular structural characteristics and antioxidant activities of polysaccharides from Canarium album (Lour.) Raeusch (CPS). Three polysaccharide fractions, CPS1, CPS2, and CPS3, were isolated from CPS by column chromatography. CPS1 and CPS3 were mainly composed of neutral polysaccharides linked by α- and β-glycosidic linkages while CPS2 was pectin polysaccharides mainly linked by β-glycosidic linkages. According to the SEC-MALLS-RI system, the molecular weight of CPS1 was greater compared to CPS2 and CPS3, and the molecular weight and radius of CPS did not display positive correlation. The chain conformation analysis indicated CPS1 and CPS2 were typical highly branched polysaccharides while CPS3 existed as a globular shape in aqueous. Furthermore, the antioxidant activity of CPS2 was better than that of CPS3, while that of CPS1 was the weakest. The antioxidant activities of polysaccharide fractions were affected by their monosaccharide composition, glycosidic linkage, molecular weight, and chain conformation. This functional property was a result of a combination of multiple molecular structural factors. CPS2 was the major antioxidant component of CPS and it could be exploited as a valued antioxidant product.
  
  
  CONCLUSIONS
  The molecular structural characteristics, antioxidant activities, and structure-function relationships of polysaccharide fractions from Canarium album were first investigated in this study. The results provided background and practical knowledge for the deep-processed products of C. album with high added value. CPS2 was the major antioxidant component of CPS, which could be exploited as a valued antioxidant ingredient in food and pharmaceutical industries.
authors.affiliation: College of Food Science, Fujian Agriculture and Forestry Univ, Fuzhou, Fujian, 350002, P. R. China.
authors.forename: Hongliang
authors.initials: H
authors.lastname: Zeng
authors.affiliation: Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland.
authors.forename: Song
authors.initials: S
authors.lastname: Miao
authors.affiliation: College of Food Science, Fujian Agriculture and Forestry Univ, Fuzhou, Fujian, 350002, P. R. China.
authors.forename: Baodong
authors.initials: B
authors.lastname: Zheng
authors.affiliation: College of Food Science, Fujian Agriculture and Forestry Univ, Fuzhou, Fujian, 350002, P. R. China.
authors.forename: Shan
authors.initials: S
authors.lastname: Lin
authors.affiliation: College of Food Science, Fujian Agriculture and Forestry Univ, Fuzhou, Fujian, 350002, P. R. China.
authors.forename: Yeye
authors.initials: Y
authors.lastname: Jian
authors.affiliation: College of Food Science, Fujian Agriculture and Forestry Univ, Fuzhou, Fujian, 350002, P. R. China.
authors.forename: Shen
authors.initials: S
authors.lastname: Chen
authors.affiliation: College of Food Science, Fujian Agriculture and Forestry Univ, Fuzhou, Fujian, 350002, P. R. China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000975:Antioxidants / Q000032:analysis / Q000302:isolation & purification / Q000494:pharmacology*; D029403:Burseraceae / Q000737:chemistry*; D004040:Dietary Carbohydrates / Q000032:analysis / Q000494:pharmacology*; D005638:Fruit / Q000737:chemistry*; D055951:Functional Food; D006801:Humans; D015394:Molecular Structure; D008970:Molecular Weight; D009005:Monosaccharides / Q000032:analysis; D010084:Oxidation-Reduction; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D011134:Polysaccharides / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D013329:Structure-Activity Relationship
chemical_list: D000975:Antioxidants; D004040:Dietary Carbohydrates; D009005:Monosaccharides; D010936:Plant Extracts; D011134:Polysaccharides
keywords: Canarium album (Lour.) Raeusch; antioxidant activities; molecular structural characteristics; polysaccharide fractions