Chemical Structure and Rheological Properties of Tara Polysaccharide Gum

Abstract:

Tara gum is a natural hydrocolloid obtained by a mechanical process from the endosperm of Tara tree seeds. In this study, chemical composition and structure of tara polysaccharide gum were characterized by fourier transform infrared spectroscopy (FT-IR) and gas chromatograph-mass spectrometer (GC-MS). Its rheological properties were also discussed. The results showed that tara gum had typical characteristics of plant polysaccharides, which was mainly consisted of galactose and mannose (mass ratio of galactose/mannose was 4.2:1), as well as a small amount of arabinose, glucose and xylose. The viscosity of tara gum solution was increased with the increase of its concentration. The tara gum solution demonstrated a higher viscocity at the shear rate lower than 80 Hz, but a higher elasticity at the shear rate higher than 80 Hz.

• Periodical: Advanced Materials Research (Volumes 821-822)
• Pages: 986-989
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.821-822.986
• Online since: September 2013
• Authors: Jin Ba*, Li Qiang Jin, Wen Run Yao
• Keywords: Characterization, Polysaccharide, Rheological Property, Tara Gum

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