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

Abstract

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-D-GalpA-(1,4)-linked, α-D-GlcpA-(1,2)-linked, β-T-D-Rhap-linked, β-D-Glcp-(1,6)-linked, β-T-D-Galp-linked, α-L-Xylp-(1,4)-linked, α-L-Araf-(1,3,5)-linked, and β-D-Manp-(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.

Characterization of aroma-active compounds in sesame hulls at different roasting temperatures by SAFE and GC-O-MS

“…Saccharide is an important raw material in these reactions. Compared with sesame seeds and kernels, hulls had the highest ratio of saccharides (about 43.0 % polysaccharides) ( Zhang et al, 2022 ). The content of furans in sesame seeds was higher than that in kernels under the same heat treatment condition because of the existence of hulls.…”

“…Raw sesame seeds were selected for high quality, and moldy, rotten, and incomplete seeds were removed. To ensure that the structure of sesame kernels and hulls was not destroyed in separating hulls from seeds, the method of Zhang et al (2022) was used. The sesame seeds were soaked in water and then rubbed by hand with gauze until the hulls were almost completely separated from the seeds.…”

Antioxidant properties of water-soluble polysaccharides prepared by co-culture fermentation of straw and shrimp shell

“…Purified PCR fragment was sequenced by DNA sequencing (Sangon Biotech, China) and compared with available 16S rRNA in the National Center for Biotechnology Information (NCBI) GenBank database. 1 The information for the similarity rate and GenBank accession number was obtained. The MEGA7.0 software was used to construct the phylogenetic tree by the neighbor-joining technique.…”

“…Polysaccharides play multiple roles in the life process with extensive biological activities and a huge potential in the fields of pharmaceutical, food, and cosmetics industries due to their efficacy and relatively low toxicity. Natural polysaccharides exhibited diverse bioactivities, such as antioxidant ( 1 ), anti-inflammatory ( 2 , 3 ), antitumor ( 4 ), antiobesity ( 5 ), immunomodulatory ( 6 ), hypoglycemic ( 7 ), and prebiotics activities ( 8 ). Natural polysaccharides are typically extracted using various techniques or fermented by microbes.…”

In Vitro Characterization of Polysaccharides from Fresh Tea Leaves in Simulated Gastrointestinal Digestion and Gut Microbiome Fermentation

“…In recent years, nutritional and biochemical scientists have increasingly recognized the importance of polysaccharides-natural high-MW polymers connected by glycosidic bonds formed by aldose or ketose. Plant polysaccharides exhibit various biological activities, including antiviral [6], anticancer [7], antioxidant [8], hypoglycemic [9], and immunoregulatory [10,11]. Consequently, they have become a research focus in the fields of food science, natural drugs, biochemistry, and life sciences globally; moreover, they have been widely used in the fields of human health and clinical medicine.…”