Journal
FOOD HYDROCOLLOIDS
Volume 41, Issue -, Pages 319-324Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2014.04.016
Keywords
Peltophorum pterocarpum seed; polysaccharide; Molecular weight; Monosaccharide composition; Solution rheology
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Funding
- Fellowship for LMN by the Leverhulme Trust Foundation
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Peltophorum pterocarpum seeds yielded similar to 20% water soluble polysaccharide. The polysaccharide is a galactomannan with mannose:galactose ratio of 4.4:1. The polysaccharide had an intrinsic viscosity of 3.14 dl/g and weight average molecular weight of 2.49 x 10(5) g/mol. The polysaccharide solutions were non-Newtonian at concentrations above 1%. A double logarithmic plot of the zero shear specific viscosity versus volume concentration gave a coil overlap concentration, c* of 2.6/[eta], with slope C-1.4 in the dilute regime and C-4.3 in the concentrated regime. The experimental data were fitted to different viscosity models with the Martin model giving the best fit. The Cox-Merz empirical rule gave close superimposition of the data from steady shear viscosity eta(gamma) over dot and complex viscosity eta*(omega) (C) 2014 Elsevier Ltd. All rights reserved.
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