Effectiveness of oral health educational program on the knowledge and practice of institutionalized orphan children in Alexandria, Egypt.

Aim: This study aimed to measure dental caries and to evaluate the improvement in the knowledge and practice of Orphan Children after implementing an educational program.

Materials And Methods: This study was an intervention pre-post design that included 80 children, aged 6-12 years. Intervention with an oral health education program was introduced to the orphans.

A Study of the Effect of Heat-Treatment on the Morphology of Nafion Ionomer Dispersion for Use in the Passive Direct Methanol Fuel Cell (DMFC).

Aggregation in heat-treated Nafion ionomer dispersion and 117 membrane are investigated by 1H and 19F Nuclear Magnetic Resonance (NMR) spectra, spin-lattice relaxation time, and self-diffusion coefficient measurements. Results demonstrate that heat-treatment affects the average Nafion particle size in aqueous dispersions. Measurements on heat-treated Nafion 117 membrane show changes in the 1H isotropic chemical shift and no significant changes in ionic conductivity.