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Drying Technology
An International Journal
Volume 24, 2006 - Issue 3
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Original Articles

Spray-Dried Chitosan Microspheres as a pDNA Carrier

, &
Pages 373-382 | Published online: 06 Feb 2007
 

ABSTRACT

Spray-dried chitosan microparticles with controlled size were prepared and crosslinked with the biocompatible reactant d,l-glyceraldehyde. Glutaraldehyde, the conventional cross-linking agent for proteins, was used as a control. The crosslinking degree was characterized through thermal analysis, X-ray diffraction, and infrared spectroscopy. In addition, the crosslinking effects were analyzed in terms of particle size, swelling capability, and surface charge. By properly choosing d,l-glyceraldehyde concentration and crosslink time, a high degree of control was achieved over the physical properties of particles. Yields around 78% as well as images obtained through fluorescence microscopy demonstrated the capability of the crosslinked chitosan microspheres to pDNA complexation.

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