Characterization of the polysaccharide from cola millenii seeds

Nwokocha, Louis M and Williams, Peter A (2020) Characterization of the polysaccharide from cola millenii seeds. International Journal of Biological Macromolecules, 161. pp. 643-647. ISSN 0141-8130


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We have isolated and characterized a water soluble polysaccharide from Cola millenii seeds. It was found to be composed of a total of 59% neutral sugars (mainly rhamnose, galactose and arabinose ~ 24, 13 and 8% respectively) and 41% uronic acids [mainly galacturonic acid]. The weight and number average molar mass values were found to be 4.7 x 106 g/mol and 3.5 x 106 g/mol, respectively. The polysaccharide exhibited polyelectrolyte properties with the intrinsic viscosity varying with salt concentration. The polysaccharide formed a highly viscous solution in water with apparent zero shear viscosities of 0.59 - 772 Pa.s at concentrations 0.3 - 2.5wt%. The solutions were shear thinning even at very low concentrations. The mechanical spectra showed gel-like characteristics at concentrations >2 wt%. The rheological behavior indicates the polysaccharide has potential for application as a thickener and suspending agent in food, pharmaceutical and cosmetic formulations.

Item Type: Article
Keywords: Cola milleniiPolysaccharideSugar compositionMolar massRheological propertiesPolyelectrolyte
Divisions: Applied Science, Computing and Engineering
Depositing User: Hayley Dennis
Date Deposited: 17 Aug 2020 10:40
Last Modified: 11 Jun 2021 03:10

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