Title of Document: OPTIMIZATION OF XANTHAN CHITOSAN POLYELECTROLYTIC HYDROGELS FOR MICROENCAPSULATION OF PROBIOTIC BACTERIA Pavan Kumar Soma, Doctor of Philosophy, 2011 Directed By: Associate Professor, Y. Martin Lo, Department of Nutrition and Food Science The effectiveness of microencapsulation system for targeted delivery of probiotics depends on its ability to protect cells from harsh gastr...

Objective- The healing effect of chitosan supported cerium oxide nanoparticles (nano-CeO2) on cutaneous experimental excisional wound infected with pseudomonas aeruginosa was studied in rat. Design- Experimental Study. Animals- Sixty male albino rats. Procedures- The chitosan supported nano-CeO2 hydrogel was prepared and characterized using Fourier-transform infrared spectro...

Chemical modification of chitosan is increasingly studied for its potential of providing new applications of chitosan. Here, a group of novel chitosan quaternary ammonium derivatives containing pyridine or amino-pyridine were designed and successfully synthesized through chemical modification of chitosan. Pyridine and amino-pyridine were used as functional groups to improve the antifungal activ...

White shrimp, Litopenaeus vannamei, which had been injected with chitin at 4, 6 and 8 microg g(-1) or chitosan at 2, 4 and 6 microg g(-1), were challenged with pathogen Vibrio alginolyticus at 2 x 10(6) colony-forming units (cfu) shrimp(-1) and then placed in seawater of 34 per thousand. The survival of shrimp that received chitin or chitosan at either dose was significantly higher than that of...

Minimal growth inhibitory concentrations (MICs) of chitosan acetate (M.W. 60 kDa) on heterotrophic bacteria (strains MK1, S, and R) isolated from the soft-rotten tissues of Neungee mushroom (Sarcodon aspratus) were measured. The slimy substance produced by the MK1 strain was responsible for the diseased mushroom's appearance. The S and R strains were members of the Burkholderia cepacia complex....

BACKGROUND AND METHODS A new cyclosporin A-loaded, PEGylated chitosan-modified lipid-based nanoparticle was developed to improve upon the formulation of cyclosporin A. PEGylated chitosan, synthesized in three steps using mild reaction conditions, was used to modify the nanoparticles. Cyclosporin A-loaded, PEGylated chitosan-modified nanoparticles were prepared using an emulsification/solvent ev...

Background and aims: Complimentary medicine plant an important role in treatment of disease because of variety of usefulness. Satureja khuzestanica Jamzad is one of the plants which is used to make nanoparticles.this study aims in Preparation, characterization and in vitro biology study of Satureja khuzestanica Jamzad essential oil-loaded chitosan nanoparticles. Method: The fabrication of Satur...

The successful encapsulation of human hepatocellular carcinoma (HepG2) cells would assist applications in tissue engineering. In this paper, we have developed a method to produce chitosan-alginate microfibers within a microfluidic chip. Also, by suspending cells in the mixing solution, we fabricated HepG2 cell-laden fibers. The encapsulated HepG2 cells in the chitosan–alginate fibers were more ...

Apple is one of the most important temperate fruit to Brazil economy, and the use of synthetic chemicals has been the main method for reducing postharvest diseases, such as the blue mold, caused by Penicillium expansum. This work intends to evaluate the practical utilization of chitosan for blue mold control. For this purpose, fruits were treated in a preventive and curative way, immersing the ...

The purpose of the present study was to design muco-adhesive chitosan microspheres containing amoxicillin. Chitosan microspheres with a small particle size and good sphericity were prepared by a spray-drying method followed by chemical treatment with a chemical crosslinking agent (glutaraldehyde). Parameters affecting the crosslinking extent of the crosslinking time and the concentration of the...