Experimental design for determining quantitative structure activity relationship for antibacterial chitosan derivatives

) towards human red blood cells and solubility of the chitosan derivatives were used as the responses in the model. The response surface model was refined by removing the interaction terms to improve the statistical significance and predictive power of the model. The investigation showed that materials with DS for trimethylation in the range 0.45-0.65, acetylation in the range 0.08-0.33 and stearoylation in the range 0.22-0.29 were capable of showing high antimicrobial activity, high solubility and low hemolytic activity.