Macromolecular and thermokinetic properties of a galactomannan from Sophora alopecuroides L. seeds: A study of molecular aggregation
文献类型： 外文期刊
作者： Guo, Rui 1 ; Li, Xujiao 1 ; Ma, Xianda 1 ; Sun, Xianbao 1 ; Kou, Yuxing 1 ; Zhang, Jun'ai 1 ; Li, Deshun 2 ; Liu, Yanfang 2 ;
作者机构： 1.Shanghai Jiao Tong Univ, Shanghai Engn Res Ctr Food Safety, Sch Agr & Biol, Shanghai 200240, Peoples R China
2.Shanghai Acad Agr Sci, Natl R&D Ctr Edible Fungi Proc, Key Lab Edible Fungi Resources & Utilizat South, Inst Edible Fungi,Minist Agr,Natl Engn Res Ctr Ed, Shanghai 201403, Peoples R China
3.Univ Shanghai Sci & Technol, Sch Med Instrument & Food Engn, Shanghai 200093, Peoples R China
关键词： Circular dichroism; Particle size distribution; Morphologic properties; Conformational behavior; Thermal analysis; Molecular aggregate
期刊名称：CARBOHYDRATE POLYMERS （ 影响因子：7.182； 五年影响因子：6.89 ）
ISSN： 0144-8617
年卷期： 2021 年 262 卷
页码：
收录情况： SCI
摘要： The molecular aggregation of a galactomannan (NSAP-25) from Sophora alopecuroides L. seeds was investigated, where three polydisperse systems were confirmed during particle size analysis, indicating existence of different aggregates composed of random coil chains revealed by circular dichroism. Morphologically, NSAP-25 aggregate of various sizes (200?1200 nm) was possibly multi-stranded and formed by ellipsoid-like particles (20?60 nm) composed of compact coil chain, exhibiting extended amorphous structure with chain-like branches intertwined. Hence, NSAP-25 aggregation was inevitable, which exerted an unignorable effect on augmenting flexibility (fl?, ??, ?? and Lp/ML?) and compactness (p?, df? and C??) of branched random coil chain based on macromolecular analysis, especially when concentration increased. Moreover, it could be relevant to thermokinetic behavior of random nucleation and subsequent growth (A2 model and negative ?S*) as well as good thermal stability (IPDT, ITS, t0.05, Tm and Tp), thus conferring potential applications for NSAP-25 in food and pharmaceutical industries.
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