No abstract

The prime focus of this investigation is to determine which morphology of magnesium oxide (MgO) is nontoxic and accumulates in sufficient quantity to a human brain cellular/tissue model. Thus, nanostructured MgO was synthesized from a coprecipitation technique involving twin synthetic protocols and the resulting product was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), size distribution histogram, Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) analysis and elemental composition was confirmed by EDX analysis. They were tested for selective antigen response in a human brain cancer model through biodistribution, biotoxicity via MTT assay, and tissue morphology. In addition, the MRI compatibility of MgO nanostructures and immunofluorescence studies were investigated on nanoconjugates with different immunoglobulins in the brain section. The results indicated that MgO had some degree of bindings with the antigens. These results led to the empirical modeling of MgO nanomaterials towards toxicity in cancer cells by analyzing the statistical data obtained by experiments. All these results are providing new rational strategy with the concept of MgO for MRI and PTT/PDT.

A novel homogeneous perturbed non-equilibrium molecular dynamics (HPMD) scheme, proposed by Evan-Gillan, has been employed to calculate the thermal conductivity of two-dimensional (2D) complex plasma liquids and crystals (CPLCs). The thermal conductivity has been reported using an improved HPMD method under the influence of constant external perturbation with different system sizes (N) and combinations of plasma parameters (Γ, κ). The current HPMD scheme provides precise outcomes with fast convergence for small-to-large N effects over a complete range of (Γ, κ). Temperature scaling law is tested for 2D thermal conductivity with appropriate Einstein frequency and found excellent behaviors. New simulations show that the thermal conductivity of CPLCs depends on (Γ, κ) and N and a slightly decreasing behavior is noted for thermal conductivity with increasing Γ and N, but, overall, thermal conductivity becomes constant at intermediate-to-large Γ. The reported thermal conductivity obtained from present HPMD method, in the limit of low equilibrium perturbation, has established a reasonable agreement with that obtained from earlier known 2D numerical and experimental data. It is demonstrated that the present HPMD method is an alternative efficient tool to compute the thermal conductivity of 2D CPLCs and can be a suitable method for complete trends of complex plasmas.

In this work, Zn1-xNixO NPs with different concentration (x= 0.0, 0.03, 0.06 and 0.09) were synthesized by using co-precipitation method. The present study is related to investigate crystal structure, surface morphology, optical and magnetic behavior of pure and Ni dopant ZnO NPs. The hexagonal wurtzite structure and crystallite size (19.45 to 21.25 nm) was investigated by using XRD analysis.SEM and FTIR used to identify the surface morphology, stretching and vibrational modes of different functional groups (ZnO, OH, CO and H-O-H) attached on the spectrum of Ni dopant ZnO NPs. Moreover, the optical behavior of Ni dopant ZnO NPs was studied by UV-visible spectroscopy which indicates the absorption band of red shift. Finally, VSM analysis illustrated that Ni dopant ZnO NPs shows high magnetization, retentivity and low corecivity as compare to pure ZnO NPs. In an overall assessment the Ni dopant ZnO NPs shows better optical and magnetic properties for biomedical applications.

No abstract