A new heteropolysaccharide from the seed husks of Plantago asiatica L. with its thermal and antioxidant properties
A new heteropolysaccharide from the seed husks of Plantago asiatica L. with its thermal and antioxidant properties
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一种来自车前草种子壳的新型杂多糖，具有热和抗氧化特性
DOI：
10.1039/c7fo01171g
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发表时间：
2017-12-01
期刊：
影响因子：
6.1
通讯作者：
Feng, Ziqian
中科院分区：
文献类型：
--
作者：
Niu, Yuge;Li, Na;Feng, Ziqian
从车前（PlantagoasiaticaL.）PMH的单糖组成为葡萄糖、木糖、阿拉伯糖、鼠李糖、半乳糖和半乳糖醛酸，摩尔比为1.0：1.8：2.4：3.8：4.9：8.5。PMH的主链由1，4-β-D-GalpA组成，侧链主要由1，3-α-D-Galp和1，2-α-D-Galp组成，连接在GlapA的O-3位。采用Flynn-Wall-Ozawa（FWO）方法进行的热分析表明PMH的表观活化能（E-a）为173.1 kJ mol（-1）。PMH在91.1摄氏度的温度下在加热过程中经历了主要的分解，干重损失为31.1%。此外，PMH表现出更强的抗氧化能力比商业车前，部分原因是由于其较高的糖醛酸含量。结果表明，PMH具有良好的结构、热稳定性和抗氧化性，可用于功能性食品。
A new heteropolysaccharide (PMH) with a molecular weight of 1.4 x 10(3) kDa was isolated from the seed husks of Plantago asiatica L. The monosaccharide composition of PMH was determined as glucose, xylose, arabinose, rhamnose, galactose and galacturonic acid with a molar ratio of 1.0 : 1.8 : 2.4 : 3.8 : 4.9 : 8.5. The backbone of PMH consisted of 1,4-beta-D-GalpA with the side chains mainly composed of 1,3-alpha-D-Galp and 1,2-alpha-D-Galp which were attached to the O-3 of GlapA. The thermal analysis using the Flynn-Wall-Ozawa (FWO) method revealed that PMH had an apparent activation energy (E-a) of 173.1 kJ mol(-1). PMH experienced a major decomposition during the heating process at a temperature of 91.1 degrees C with a dry weight loss of 31.1%. Moreover, PMH exhibited stronger antioxidant ability than commercial psyllium, partially due to its higher content of uronic acid. The results suggested that PMH could be used in functional foods due to its structural, thermal and antioxidant characteristics.