The growth inhibition this website area on agar plate was measured. The FTIR studies (Fig. 1) and DSC analysis

(Fig. 2) confirmed the absence of any chemical interaction between the drug and the polymer. Macroscopical features revealed that the drug was dissolved in the polymer matrix rather than dispersing. The physical properties such as thickness, uniformity of weight, percentage moisture loss, tensile strength, folding endurance, content uniformity, surface pH were given in Table 2. The fabricated films showed good film forming properties and reproducibility. The films were thin, flexible, elastic and smooth. Scanning electron microscopy pictures showed that the upper surface of plain films was smooth while the upper surface of drug loaded films was rough suggesting that the drug was dispersed rather than

dissolved in the polymer solution prior to film formation. Sodium citrate concentration, pH and cross linking time had little effect on the surface morphology of citrate/chitosan films. The cross section of the citrate/chitosan films was very integral and dense. However, all the films were yellowish cream in colour, with the colour deepening and film texture becoming tenderer with increase in crosslinking concentration and time. The SEM photographic pictures of the film were shown in Fig. 3. Table 2 shows the mean thickness of the films prepared at varying combinations of crosslinking concentration MEK inhibitor and time. The results show that there was no significant difference between the films in terms of film thickness. The thickness of all the films no ranges from 204.3 to 218.43. Weights of all the formulations were in the range of 19.8–23. This indicated that

all the films were uniform in weight. The folding endurance values of all the films were in the range of 295–300. It indicated that all the formulations had ideal properties. The pH of all the formulations was found to have between 7.1 and 7.48. The surface pH of all films was found to be neutral and hence no periodontal pocket irritation is expected. Percentage moisture loss values range from 1.52 to 2.18. These studies observed that formulation F1 showed maximum moisture loss and F 12 showed a minimum moisture loss because on more crosslinking the film becomes more tenderer and there will be less moisture loss. The tensile strength values of the films ranged from 20.16 to 28.7 kg/cm2. This is because the longer the crosslinking time results in more tender films. The reduction in tensile strength values was observed on more crosslinking time and more concentration of crosslinking agent. The content of drug in all the films range 95.34–96.45. This indicated that the drug is uniformly distributed in all the formulations. F5 showed highest content uniformity where as F12 showed less content uniformity. The films were studied for stability studies for 1 month and there were no changes in physical parameters. From Fig.