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Catechin-grafted arabinoxylan conjugate: Preparation, structural characterization and property investigation
- Source :
- International Journal of Biological Macromolecules. 182:796-805
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- In this study, a high molecular weight arabinoxylan (AX, Mw: 694 kDa) from wheat bran was alkaline extracted and covalently linked with Catechin (CA) by free radical catalytic reaction. Comparing to AX, arabinoxylan-catechin (AX-CA) conjugates demonstrated an extra UV–vis absorption peak at 274 nm, a new FT-IR absorption band at 1516 cm−1 and new proton signals at 6.5–7.5 ppm, which all confirmed the covalently linked structure. Grafting CA onto AX not only decreased the molecular weight, thermal stability and apparent viscosity of AX, but also enhanced its inhibition effects on starch digestibility in vitro. The in vitro fermentation test with pig feces showed that the degradation & utilization rate of AX, the total short-chain fatty acid (SCFA) and acetic acid levels produced all were significantly delayed after grafting. This study provided a novel approach to synthesize AX-CA conjugates that could be a novel dietary fiber of enhanced functional/bioactive properties using in the fields of functional foods and medicine.
- Subjects :
- Hot Temperature
Swine
Starch
Nanoconjugates
02 engineering and technology
Biochemistry
Catechin
03 medical and health sciences
chemistry.chemical_compound
Acetic acid
Structural Biology
Arabinoxylan
Animals
Molecular Biology
Triticum
Acetic Acid
030304 developmental biology
chemistry.chemical_classification
0303 health sciences
Viscosity
Hydrolysis
Absorption, Radiation
Fatty acid
General Medicine
Fatty Acids, Volatile
021001 nanoscience & nanotechnology
chemistry
Covalent bond
Fermentation
Xylans
0210 nano-technology
Conjugate
Nuclear chemistry
Subjects
Details
- ISSN :
- 01418130
- Volume :
- 182
- Database :
- OpenAIRE
- Journal :
- International Journal of Biological Macromolecules
- Accession number :
- edsair.doi.dedup.....45e0ab48912c00e62b337fd4c28a5448