Characterization and functionalities study of hemicellulose and cellulose components isolated from sorghum bran, bagasse and biomass

• The novel and functional components from SBR, SBA and SBI are extracted.
• Higher Ara/Xyl values of extracts from SBR indicates its highly branched structure.
• TDF and IDF contents in original sorghum were in the following order: SBA ˃ SBI ˃ SBR.
• Both the drum and spray dried CRF from all sorghum sources show high WHC.
• Hemi. B from all three sorghum sources had an excellent emulsion stability.

This study was undertaken to isolate and characterize three carbohydrate-rich fractions: Hemicellulose A (Hemi. A), Hemicellulose B (Hemi. B) and cellulose-rich residue (CRF) from sorghum bran (SBR), sorghum bagasse (SBA) and sorghum biomass (SBI). The monosaccharide composition of the Hemi. A and Hemi. B fractions was determined, indicating that SBR has a highly branched structure. The analysis of insoluble dietary fiber (IDF), soluble dietary fiber (SDF) and total dietary fiber (TDF) showed that TDF and IDF contents in original sorghum materials were in the following order: SBA ˃ SBI ˃ SBR. CRF from SBA was rich in IDF. Hemi. B fractions were completely soluble in water and so they were rich in SDF. CRFs from all sorghum sources show high water holding capacity (22.76 to 35.27 g water/g CRF). The emulsion stability study showed that the Hemi. B from all sorghum sources had a better emulsion stability than the well-studied corn fiber gum (CFG).