首页|Physicochemical properties and antioxidant activity of Maillard reaction products derived from Dioscorea opposita polysaccharides
Physicochemical properties and antioxidant activity of Maillard reaction products derived from Dioscorea opposita polysaccharides
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NSTL
Elsevier
Dioscorea opposita Thunb., an edible and pharmaceutical plant, is usually consumed after heating processing, such as steaming, boiling, and frying with bran. In order to determine the effect of heating temperature on Maillard reaction products (MRPs) of polysaccharides from Dioscorea opposita (DOP), DOP-MRPs at 90-120 degrees C were prepared. The characterisation including colour, pH, FT-IR, XRD, fluorescence, UV-vis spectroscopy, and volatile compounds by GC-MS and GC-IMS were investigated. Results showed that the major volatile compounds of DOP-MRPs were acids, esters and ketones. Esters were generated the most (approximately 65.80%) at 90 degrees C, and acetic acids were produced approximately 25.70%. According to principal component analysis, flavours in DOP-MRP-90 and DOP-MRP-120 showed significant differences. Additionally, antioxidant activities including hydroxyl radical (HRS), DPPH scavenging and ferric ion reducing antioxidant power (FRAP) were conducted. The DOP-MRP-90 presented highest antioxidant activities, indicating that it donated more hydrogen atom to stabilize free radicals. This study provides a scientific basis for the application of the Maillard reaction in foods for Chinese yam polysaccharides.
NSTL
Elsevier
