The rheological properties of polysaccharides sequentially extracted from peony seed dreg.
The peony seed dreg polysaccharides (PSDPs) were sequentially extracted using hot buffer (HBSS), chelating agent (CHSS), dilute alkaline (DASS) and concentrated alkaline (CASS). The rheological properties of PSDPs were investigated by steady-shear and oscillatory rheological measurements. The four PSDPs fractions in solution exhibited typical non-Newtonian and shear-thinning behavior. The viscosity of HBSS was higher than the rest. While the viscosity value of all PSDPs solution decreased at acid pH (4.0) and alkaline pH (10.0), in the presence of Ca(2+) and high temperature (90°C), it increased in the presence of Na(+) and following freezing. The modulus G' and G" of all PSDPs solution were increased with increasing oscillation frequency ranging between 0.01 and 100Hz at each concentration. In all four cases, the crossover of G' and G" values decreased gradually with increasing concentration of samples.
School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
Jun-Jun
JJ
Shi
School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
Jian-Guo
JG
Zhang
School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
Yu-Han
YH
Sun
School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
Qi-Xin
QX
Xu
School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China; School of life Science, Hefei Normal University, Hefei 230009, People's Republic of China.
Ling
L
Li
Department of Nutrition and Food Sciences, Texas Woman's University, Denton, TX, USA.
Chandan
C
Prasad
School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China; Agricultural and Forestry Specialty Food Processing Industry Technological Innovation Strategic Alliance of Anhui Province, Hefei 230009, People's Republic of China. Electronic address: zjwei@hfut.edu.cn.
Zhao-Jun
ZJ
Wei
D029596:Paeonia / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry*; D012212:Rheology; D012639:Seeds / Q000737:chemistry*; D014783:Viscosity
D011134:Polysaccharides
Peony seed dreg; Polysaccharides; Rheological properties; Sequential extract