This paper reports on experimental investigations dealing with the influence of titanium dioxide nanoparticles on the breakdown voltage of transformer oil. TiO 2 particles with the nano size could be synthesized by the sol-microwave method. The materials characterized by XRD, SEM and TEM techniques. In this study, we have measured the dielectric breakdown voltage of transformer oil-based nanofluids in accordance with IEC 156 standard. The concentrations of TiO 2 nanoparticles in transformer oil are in the range from 0.001 g/l to 0.01 g/l. These concentrations for fresh oil (before and after the physical purification) and used oils for about 4 and 15 years, evaluated separately and the results were compared. Experiment results indicated that the addition of TiO 2 nanoparticles to transformer oil can enhance its dielectric strength and the surface compositions of the TiO 2 nanoparticles play an important role in its dielectric performance. When the volume concentration of nanoparticles is above 0.003 g/l, the dielectric breakdown voltage decreases. Based on test results and Due to the weather conditions in Gilan that has about 80 percent humid, titanium dioxide can be increase the breakdown voltage of transformer oils in free of moisture as well as humidity conditions.

Background and the purpose of the study The purpose of the present research was to synthesize affordable nanoparticles for simultaneous drug release and cell fluorescence imaging to decrease the costs associated with conventional treatments. Methods In the present study, N-doped carbon nanodots@UiO-66-NH 2 nanoparticles were simply synthesized in few steps and were used as a novel carrier for rosmarinic acid (RA). Nano particles were characterized by FT-IR spectroscopy, X-ray powder diffraction (XRD), Dynamic Light Scattering (DLS) and field emission scanning electron microscopy (FE-SEM). UV/vis spectroscopy was used to study the release profile of RA drug from this novel carrier. Methylthiazolyl tetrazolium (MTT) assay was to evaluate the effect of irradiation with a (UV) lamp. Confocal laser scanning microscopy was used for fluorescence imaging of cancer cells. Results Results of the MTT assay revealed that UiO-66-NH 2 @N-CNDs nanoparticles as a drug carrier for RA, have an excellent therapeutic effect due to their high quantum yield under irradiation of UV light. On the contrary, the observed therapeutic effect was decreased under ambient light. Conclusions UiO-66-NH 2 @N-CNDs nanoparticles can be considered as promising vehicles for drug delivery due to their cost effectiveness in cancer treatment, based on the results of MTT assay. It should be emphasized that this nanocarrier can be as potential platforms for coincident drug delivery system and cell fluorescence imaging due to possessing green fluorescence and microporosity features.

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The molecule of the title compound, [Hg(C(13)H(9)N(2)O(2)S)(2)], has approximate twofold rotation symmetry, with the Hg atom in an essentially linear two-coordinate HgS(2) environment supported by secondary pi interactions with the nitrophenyl rings of both ligands. The ligands are in the imine-thiolate rather than the amine-thione tautomeric form.