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Table of Content
15 December 1998, Volume 19 Issue 12
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Abdel-Mutaleb M .Khatir University of Zalingi Sudan
Adbel-MutalebM.Khatir , SUN Qing-Jie, LI Wei, DING Xiao-Lin
1998, 19(12): 18-20.
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The rheological properties of the gum from seeds of a member of loguminosae have studied. The samples used had mannose: galactose ratio close to unity and molecular weight of 3. 12 × 105. No shear rate viscosity dependence was obtained in the range of the shear rate used for lower concentration(0. 5% ). For the high concentrations(>1. 0% ) the behavior of the gum solutions became shear-thinning. Viscosinty decreased with decreasing of the PH due to the hydrolysis of the polymers. At high pH the neutral polymers were converted to polyelectrolytes which was caused increasing in viscosity. Temperature viscosity dependence was observed, viscosity decreased when the temperature was decreased. The viscoelastic behavior was lower than that found for Other galactomannans and less severe dependence of the viscosity on the coil overlap parameter is probably due to the lower interaction because of the high galactose content.