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Genipin-cross-linked kappa-carrageenan/carboxymethyl cellulose beads and effects on beta-carotene release

Muhamad, Ida Idayu and L. S., Fen and N. H., Hui and N. A., Mustapha (2010) Genipin-cross-linked kappa-carrageenan/carboxymethyl cellulose beads and effects on beta-carotene release. Carbohydrate Polymers, 83 (3). 1207–1212. ISSN 0144-8617

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Official URL: http://dx.doi.org/10.1016/j.carbpol.2010.09.021

Abstract

Beads of kappa-carrageenan/sodium carboxymethylcellulose were prepared based on different blend formulations using genipin, a natural and non-toxic cross-linking reagent. Different genipin concentrations (0.5, 1.0, 1.5 mM) were used to study the effects on swelling ratio of the beads in different pH values under simulated gastrointestinal tract condition (pH 1.2 and 7.4). Results have shown that the cross-linkedbeads possess lower swelling ability in all pH conditions and swelling ratio decreases with increasing genipin concentration (95.24% in pH 1.2; 100% in pH 7.4 at 0.5 mM genipin; 76.2% in pH 1.2; 85.71% in pH 7.4 at 1.5 mM genipin). It was also found the beads released beta-carotene slower and lesser after being cross-linked. Microstructure study shows that cross-linkedbeads exhibited smoother surface and more spherical shape compared to the native beads. This indicates that cross-linking of genipin has enhanced the beads network stability and their structure to be applied as suitable hydrogel.

Item Type:Article
Uncontrolled Keywords:hydrogel, cross-linking, genipin, kappa-carrageenan/carboxymethylcellulosebeads, swelling ratio
Subjects:Q Science > QD Chemistry
Divisions:Chemical Engineering
ID Code:26173
Deposited By: Liza Porijo
Deposited On:28 Jun 2012 00:45
Last Modified:12 Jul 2012 04:04

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