Structural characteristics and rheological properties of alkali-extracted arabinoxylan from dehulled barley kernel

被引:41
作者
Li, Lin-Yan [1 ]
Wang, Yu-Xiao [1 ]
Zhang, Ting [1 ]
Zhang, Jian-Fang [1 ]
Pan, Meng [1 ]
Huang, Xiao-Jun [1 ]
Yin, Jun-Yi [1 ]
Nie, Shao-Ping [1 ]
机构
[1] Nanchang Univ, State Key Lab Food Sci & Technol, China Canada Joint Lab Food Sci & Technol Nanchan, Nanchang 330047, Jiangxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Barley kernel; Arabinoxylan; Structural characteristics; Rheological behavior; WHEAT-BRAN ARABINOXYLAN; ENDOSPERM CELL-WALLS; RICE BRAN; MOLECULAR CHARACTERIZATION; PHYSICOCHEMICAL PROPERTIES; BETA-GLUCAN; WATER; FEATURES; POLYSACCHARIDE; DOUGH;
D O I
10.1016/j.carbpol.2020.116813
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Arabinoxylan (BIF-60) was isolated from barley water-insoluble fiber (BIF) by ethanol precipitation at 60 % (v/ v). BIF-60 was composed of xylose (48.5 %) and arabinose (30.3 %). Its average molecular weight was 1360 kDa. Methylation and 1D/2D NMR analysis showed that BIF-60 possessed beta-(l -> 4)-xylan as backbone, comprised of un-substituted (1,4-linked beta-Xylp, 56.9 %), mono-substituted (1,2,4-linked and 1,3,4-linked beta-Xylp, 22.1 %) and di-substituted (1,2,3,4-lin4ked beta-Xylp, 18.4 %) xylose units, as well as other residues (T-Araf-(1 ->, T-Xylp ->(1 ->,-> 5)-> Araf-(1k ->,-> 2)-Araf-(1 ->, -> 3)-Araf-(1 -> and -> 4)-Glcp-(1 ->). BIF-60 exhibited shear-thinning behaviour, low gel stability and weak gelling ability at high concentrations. This work provides a theoretical and experimental basis for molecular structure and properties of the alkali-extracted arabinoxylan from barley kernel, which could guide further functional research and application of barley-derived arabinoxylan.
引用
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页数:10
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