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Reference type: Journal
Authors: Kaffashi B, Zandieh A, Khadiv-Parsi P
Article Title: Drug release study of systems containing the tragacanth and collagen composite: Release characterization and viscoelastic measurements.
Publication date: 2006
Journal: Macromolecular Symposia
Volume: 239
Issue: (1)
Page numbers: 120-129.
DOI: 10.1002/masy.200690088

Abstract: The kinetics of water penetration and pentoxifilline release from both Tragacanth gum and Tragacanth/Collagen matrices has been examined in pure deionised water. The rheological oscillatory measurements of their gel layer obtained by swelling of the imprinted pentoxifilline-filled polymer matrix with water have been performed. To qualify a polymer for application in drug formulation, appropriate gel stiffness is required. The aqueous solution of Tragacanth does not seem to acquire the actual strength that a hydrogel must retain for this purpose. Thus, along with Tragacanth, gelatin, CaCl2 and 1, 8 octandiamine curing agent were individually blended in a mixture with Tragacanth gum to improve the gel behavior and drug delivery of the system. The strength of the gel at the body temperature (37 degrees C) was studied using a cone and plate rheometer. It was found that gelatin could enhance the gel strength of Tragacanth by forming a porous composite. The drug release to an aqueous solution at room temperature was analyzed to be slower for a composite of 1:2 Tragacanth/Collagen
Template and target information: pentoxifilline
Author keywords: collagen, composite, Drug release, Tragacanth, viscoelastic

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