Molecular structural properties of a polysaccharide isolated and purified fromSophora japonicapods and its relationship to their rheology

Abstract

A water-soluble polysaccharide SJ-A presenting a relatively narrow molecular weight distribution was prepared by ethanol precipitation and purified from the pods of S. japonica. Chemical composition, molecular weight distribution, and glycosidic configurations of SJ-A were elucidated by sugar analysis, molecular determination, Fourier-transform infrared spectroscopy (FTIR), and nuclear magnetic resonance (NMR) analyses. The impacts of the concentration (0.5-2.0%) of SJ-A on the rheological parameters were investigated to clarify the molecular crosslinking features of SJ-A in relation to its rheological properties. The experimental results indicated that the microstructural coupling of the gel induced at higher concentrations of SJ-A required a higher frequency of the rheometer.

Sophora japonica L. bioactives: Chemistry, sources, and processing techniques

“…The weight‐ and number‐averages of the purified polysaccharides were 1.5 × 10 5 and 1.4 × 10 5 Da, respectively. The monosaccharides comprised mannose (60.7%) and galactose (35.1%), glucose (3.80%), xylopentaose (2.90%), arabinose (2.17%), and rhamnose (1.23%) (Li et al., 2017). Studies have also purified lectin from S. japonica barks via GFC and IEC (Hankins et al., 1988).…”