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Characterization and functionalities study of hemicellulose and cellulose components isolated from sorghum bran,
Shuang Qiu1, Madhav P Yadav2, Lijun Yin3
1Beijing Key Laboratory for Food Non-thermal Processing, College of Food Science and Nutritional Engineering, China Agricultural University, P. O. Box 40, No. 17 Qinghuadonglu, Haidian, Beijing 100083, PR China; Eastern Regional Research Center, Agricultural Research Service, US Department of Agricultural, 600 East Mermaid Lane, Wyndmoor, PA 19038, USA.
Abstract:
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 35.27g 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).