AUTHOR=Zhang Run-Yang , Gao Jing-Hao , Shi Yi-Lin , Lan Yi-Fei , Liu Hua-Min , Zhu Wen-Xue , Wang Xue-De 

TITLE=Characterization of Structure and Antioxidant Activity of Polysaccharides From Sesame Seed Hull

JOURNAL=Frontiers in Nutrition

VOLUME=9

YEAR=2022

URL=https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2022.928972

DOI=10.3389/fnut.2022.928972

ISSN=2296-861X

ABSTRACT=<p>Sesame seed hull is the major by-product of sesame seed processing and is rich in polysaccharides. In this work, sesame hull polysaccharides (SHP) were extracted by ultrasound-assisted alkali extraction methods with a yield of 6.49%. Three purified polysaccharide fractions were obtained after decolorization, deproteinization, and column chromatography. Then, their main composition and antioxidant activity were investigated. The dominant fraction was SHP-2 with a yield of 3.78%. It was composed of galacturonic acid (51.3%), glucuronic acid (13.8%), rhamnose (8.9%), glucose (8.4%), and others. The linkage types of SHP-2 have the α-<sc>D</sc>-Gal<italic>p</italic>A-(1,4)-linked, α-<sc>D</sc>-Glc<italic>p</italic>A-(1,2)-linked, β-T-<sc>D-</sc>Rha<italic>p</italic>-linked, β-<sc>D-</sc>Glc<italic>p</italic>-(1,6)-linked, β-T-<sc>D-</sc>Gal<italic>p</italic>-linked, α-<sc>L</sc>-Xyl<italic>p</italic>-(1,4)-linked, α-<sc>L-</sc>Ara<italic>f</italic>-(1,3,5)-linked, and β-<sc>D-</sc>Man<italic>p</italic>-(1,4)-linked. This study might provide some useful basic data for developing applications for sesame seed hull polysaccharides in the food and pharmaceutical industries.</p>