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The 2009 ASHS Annual Conference

1935:
Rheological Properties of Water-Soluble Polysaccharide In Peach Gum From Almond (Prunus dulcis)

Saturday, July 25, 2009
Illinois/Missouri/Meramec (Millennium Hotel St. Louis)
Sen Wang, Central South University of Forestry and Technology, Changsha, China
Lin Zhang, The key Lab. of Non-wood Forest Product of Forestry Ministry, Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha,410004, China
Deyi Yuan, Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha,410004, China
Qiuping Zhong, Central South University of Forestry and Technology, Changsha, China
Yina Li, Central South University of Forestry and Technology, Changsha, China
The rheological properties of water-soluble polysaccharide in peach gum from almond (Prunus dulcis) were studied in this paper in order to provide more scientific technical parameters and references for developing peach gum as a kind of medicinal gum. This study was conducted on different material rates, temperatures, shaking times, pH values, and salinities, respectively. The mathematical model of shear rate with material rate and shear stress was Y=0.069X12+0.035X2- 1.174, R2 =0.942. The mathematical model of shear rate with temperature and shear stress was Y=4.936X12+0.0232X2-1.688, R2=0.937. The mathematical model of shear rate with shaking time and shear stress was Y= 0.005192X13-0.14073X12 +1.249045X1+ 0.036546X2- 3.64429, R2=0.9543. The effects of pH value on the rheological properties in the supernatant of peach gum were comparatively complicated with a varying range of 3~11 and the shear rate showed a change trend of saddle model. The mathematical model of shear rate with the concentration of NaCl and shear stress was Y= -0.03744X1+ 0.01293X2, R2 =0.998. The mathematical model of shear rate with the concentration of CaCl2 and shear stress was Y= 0.025789X1+ 0.01619X2, R2 =0.999. The mathematical model of shear rate with the concentration of sorbic acid potassium and shear stress was Y= 0.0795X1+ 0.0173X2, R2 =0.998. In sum, the material rates, temperatures, shaking times, and pH values significantly affected the rheological properties in the supernatant of peach gum. The concentrations of NaCl and CaCl2 also significantly affected the rheological properties expect the concentration of sorbic acid potassium.
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