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In this study, different chemical methods were used to synthesize ZnO nanorod, TiO 2 nanotube and ZnO/TiO 2 nanostructure as high sensitivity vapor sensor for ethanol. The surface topography of ZnO nanorod, TiO 2 nanotube and ZnO/TiO 2 was studied by using the scanning electron microscopy (SEM). The X-rays diffraction showed the appearance of (101) ZnO which has single crystalline with a hexagonal wurtzite while TiO 2 has been crystallized in a tetragonal with the preferential orientation of the crystallinity with the prominent (111). The relation between resistance-time showed high sensitivity for ZnO/TiO 2 and was found to be around 20-80% at different working temperature. ZnO/ TiO 2 sensor was the most sensitive to ethanol vapor.

In this research, sulfur nanoparticles were prepared using the plant synthesis method, and the particles were identified through biological equipment for the purpose of adding them for application purposes. The structural, surface, and optical properties of S-NPs were investigated. Transmittance and band gap were calculated using an optical approach to explore the optical properties. Surface and structural properties of the film were investigated using SEM micrographs and an X-ray diffraction pattern, respectively. The antibacterial and antifungal potential of S-NPs has been identified after extensive research.

In this study, one hundred ten male white rabbits of the New Zealand type, weight (1-2) Kgm, age (12-18) month, obtained from local markets, rabbits was putted in specific cages specially made for this purpose one week before dosing, and under appropriate conditions of temperature (25-28) °C, a light period (14) hour per day. With good ventilation, the standard bush and water were provided to rabbits using aluminum containers in equal quantities. Rabbits were orally administered for two weeks with CdS nanoparticles (dose= 1ml/kg and concentration=20 μg/mL orally), after which blood was drawn from the rabbit's heart to make blood measurements and liver enzymes. Rabbits were dissected and liver was preserved with formalin for histological examination. Keywords: CdS Nanoparticles; Laser Ablation; Neuronal toxicity; Liver; Beta vulgaris L..