International Journal of Chemical Studies
Vol. 6, Issue 1 (2018)
Characterization and Rheological behavior of the gum from Acacia oerfota
Author(s): Mustafa E Ahmed, Mohammed E Osman and Elfatih A Hassan
Abstract: The physicochemical properties of Acacia oerfota gum were investigated. The results show that moisture was in the range of (11.13 - 13.65%), Ash (1.10 - 1.86%), pH (4.55 - 5.28), specific optical rotation (+65 - +80), nitrogen (0.42 - 0.77%), hence protein (2.19 - 3.94%), acid equivalent weight (2941 - 5357), total uronic acid (3.62 - 6.60%), calorific value (4.02 - 4.08 Kcal/g), color Gardner (1 - 3), intrinsic viscosity (3.4 - 11.4 cm3g-1), and the number average molecular weight (1.68x105 and 1.80x105 g/mol) Rheological studies indicate a Newtonian behavior of A. oerfota gum across a wide range of concentrations and different shear rates, and the molecule can be reformed after the applied stress. The loss modulus (viscose) G" and storage modulus (elastic) G' carves obtain that A. oerfota gum has viscose behavior not changed to elastic or viscoelastic under applying gradual increasing oscillating frequencies.
Pages: 97-101 | 789 Views 24 Downloads
How to cite this article:
Mustafa E Ahmed, Mohammed E Osman, Elfatih A Hassan. Characterization and Rheological behavior of the gum from Acacia oerfota. Int J Chem Stud 2018;6(1):97-101.