Production of nanoparticles, of powders and setup of components for power equipment

The paper presents ways to produce magnetic nanoparticles to be incorporated into magneto-bioelectronic devices where chemical processing must control composition, microstructure, phase purity, particle morphology, and control size particle, thereby reducing particle aggregation and size distribution. The methods of synthesis of magnetic nanoparticles are analyzed: physical vapor deposition, mechanical and chemical synthesis in the solution. Solution synthesis offers advantages: easy control of the size and composition of the particles, possibilities to change the surface in order to obtain a stable dispersion in different solid or liquid media. The properties of nanoscale powders, nanostructured materials and nanoparticles in solution are strongly dependent on particle size, and their dispersion state. Laboratory syntheses have been performed by analyzing the methods of synthesis of nanometric magnetic particle

Ti-Zr-Si-Nb nanocrystalline alloys and metallic glasses: Assessment on the structure, thermal stability, corrosion and mechanical properties

The development of novel Ti-based amorphous or \u3b2-phase nanostructured metallic materials could have significant benefits for implant applications, due to improved corrosion and mechanical characteristics (lower Young's modulus, better wear performance, improved fracture toughness) in comparison to the standardized \u3b1+\u3b2 titanium alloys. Moreover, the devitrification phenomenon, occurring during heating, could contribute to lower input power during additive manufacturing technologies. Ti-based alloy ribbons were obtained by melt-spinning, considering the ultra-fast cooling rates this method can provide. The titanium alloys contain in various proportions Zr, Nb, and Si (Ti60Zr10Si15Nb15, Ti64Zr10Si15Nb11, Ti56Zr10Si15Nb19) in various proportions. These elements were chosen due to their reported biological safety, as in the case of Zr and Nb, and the metallic glass-forming ability and biocompatibility of Si. The morphology and chemical composition were analyzed by scanning electron microscopy and energy-dispersive X-ray spectroscopy, while the structural features (crystallinity, phase attribution after devitrification (after heat treatment)) were assessed by X-ray diffraction. Some of the mechanical properties (hardness, Young's modulus) were assessed by instrumented indentation. The thermal stability and crystallization temperatures were measured by differential thermal analysis. High-intensity exothermal peaks were observed during heating of melt-spun ribbons. The corrosion behavior was assessed by electrocorrosion tests. The results show the potential of these alloys to be used as materials for biomedical applications

EX VITRO STUDY ON TESTING THE TREATMENT WITH A STIMULATING EFFECT ON THE SEED GERMINATION RATE OF OCIMUM BASILICUM L.

The stimulation of the seed germination rate may be one of the ways to prevent environmental attacks of byotik or abyotik agents on the quality of seedlings. One of the factors involved in stimulating the germination rate of seeds is red light illumination. Currently, the source for generating red light that consumes the smallest amount of energy is atermic laser. Ocimum basilicum L. is one of the plant species that have been used by man since ancient times in culinary, medicinal, decorative and spiritual activities. Therefore, this paper presents experimental data obtained by testing the treatments based on the use of a laser light field, with a stimulating effect on the rate of seed germination on Marseille and Red Rubin basil (Ocimum basilicum L.) varieties. The experimental data obtained recommendes the application of field laser light treatments for 30' in order to stimulate the germination rate of seeds and in order to obtain seedlings for each of the two varieties of basil (Ocimum basilicum L.) under study