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Bacgrond and Aim: Oral health is an important component of lifestyle. And recovery requires proper training methods to improve knowledge, attitudes and practices in relation to its population. The aim of this study was to compare the effect of lecture and video screening in improving the knowledge, attitude and practice of dental hygiene students. Methods:The survey is a quasi-experimental intervention survey done in Chabahar in 2011-2012. By sampling a regular allocation process is divided into three equal groups (each group n = 100:control, lecture and film) were divided..Knowledge, attitude and Practice student were measures by self report questionnaires and pre-test and post-test . And relevant data was analysed by using of software SPSS VERZHON 11, statistical tests ANOVA, Mann-Whitney. Results :The Lecture And Film Group knowledge And attitude immediatelly and 3 months after the intervention, the practice immediately after the intervention increased But A more effective approach to video on improving the knowledge, attitude and practice of oral health revealed (P <0/001). Conclusion:This study showed that both the training lectures and video display can be an effective way to promote Oral health Education Knowledge , attitudes and practice of the people Although video method is more effective.

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The abrupt conformational matrix, in which PNIPAM or its modified forms transition of it upon changes at temperatures, may be embedded. It is expected that the change around 32´C has stirred up explorations for in temperature may induce the conformational technological applications. Methods & Materials: Thermo-sensitive hydrogels were prepared by graft copolymerization of chitosan and N-Isopropylacrylamide via gamma radiation. Characterization of hydrogels such as 13C-NMR, DSC analysis and swelling test and cell assessments for harvesting living cell sheet were investigated. 13C-NMR and DSC analysis showed chitosan and NIPAAm monomer were grafted via gamma radiation successfully. Findings: Swelling ratio and curves results administrated hydrophilicity / hydrophobicity of hydrogel that this property is due to presence of PNIPAAm in different temperatures. The hydrogel was tested for harvesting epithelial cells after carrying out cell culture at 37 °C and incubating the confluent cells at 4°C for spontaneous detachment of cell sheet from hydrogel surface without enzyme treatment. Discussion & Conclusion: Cell viability assay results and microscopic observations demonstrated that cells could attach to the hydrogel surface and maintain high viability and proliferation ability. Cell detachment efficiency from the hydrogel was high. These unique properties of the hydrogel would make it a promising support for epithelial cell grafting especially cornea regeneration.

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Abstract: introduction: Since carbon nanotubes (CNTs) were discovered by Iijima in 1991, it opened up new opportunities in the field of molecular electronics, sensoring, composite materials, drug delivery system and cancer therapy. Application of CNTs in drug delivery systems is being investigated actively because of their useful combination of size and physicochemical properties. Matherials& Methods: Significant factor in our study, multiwall carbon nanotubes by chemical carboxyl labeled (MWNT-COOH) with methyl 2 - (2 - amino - 4 oxo Thiazole - (H4) - Alidin) acetate ((MWNT-Amide in terms of microwave said. then, carbon nanotubes amide labeled (MWNT-Amide) by reaction with phenyl hydrazine in 20 minutes derived Thiazole on nanotubes produced by spectroscopy IR, Raman, SEM, elemental analysis, and TGA was Also examined the effect of the nanotubes on cells. Finding: Results are highly toxic to cells than other samples of MWNT-Thiazole showed. Discussion & Conclusion: fictionalization of groups is very effective for toxicity reduction of MWNT that can be used for conjugate to drugs or biochemically materials.