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Influence of Ca2+-ion upon viscoelastic properties of gellan gum aqueous solutions

✍ Scribed by Tomio Shimazaki; Yoshihide Sato; Kazuyoshi Ogino; Etsuyo Ogawa

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
722 KB
Volume
3
Category
Article
ISSN
0966-7822

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✦ Synopsis

Viscoelastic properties of gellan gum aqueous solutions [San-Eigen F. F. I. (Osaka), Lot No. 62058A] were observed in order to study the influence of Ca2+

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tons upon the solution properties. The results were (i) the solution of Sample 1 (Ca2+ -0.5%) showed narrowing of the oscillating amplitude of the ball after -10 cycles (this is known as negative thixotropy); (ii) abrupt decreases in viscosity were observed for the solution of Sample 2 (Ca2+ -0.1%) in the narrow temperature range of &0*5"C; (iii) unstable behavior of oscillating ball was found for the solution of Sample 3 (Ca2+ -O.OO%), and this may be attributed to the inhomogeneity in the solution of the order of 10 -' m, which was removed after stirring for one week.

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