نتایج جستجو برای: فولاد ni
تعداد نتایج: 56688 فیلتر نتایج به سال:
Fine-tuning of the porphyrin β-periphery is important for naturally occurring metal tetrapyrroles to exert diverse biological roles. Here we describe how this approach is also applied to design molecular catalysts, as exemplified by Ni(ii) porphyrinoids catalyzing the hydrogen evolution reaction (HER). We found that β-hydrogenation of porphyrin remarkably enhances the electrocatalytic HER react...
Ni-silicide/Si nanowires were fabricated by atomic force microscope nano-oxidation on silicon-on-insulator substrates, selective wet etching, and reactive deposition epitaxy. Ni-silicide nanocrystal-modified Si nanowire and Ni-silicide/Si heterostructure multi-stacked nanowire were formed by low- and high-coverage depositions of Ni, respectively. The Ni-silicide/Si Schottky junction and Ni-sili...
El presente trabajo buscará dar cuenta de las características, identidades políticas y reivindicaciones del estudiantado la Universidad Obrera Nacional (UON) en el periodo fundacional esta casa estudios, que se extiende desde su apertura marzo 1953 hasta sanción ley 14.885/59, normativa mediante oficializa denominación “Universidad Tecnológica Nacional” (UTN) inclusión dentro régimen autarquía ...
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