Zeolites are one of the most widely used materials in heterogeneous catalysis. However, the current understanding of the relation between structure and reactivity of these complex and highly porous materials mostly comes from studies employing bulk-sensitive techniques and from theoretical calculations based on educated assumptions about the inner surface within the pores present in the framewo...

We developed a systematic method for optimizing the design of depth-graded multilayers for astronomical hard-x-ray and soft-gamma-ray telescopes based on the instrument's bandpass and the field of view. We apply these methods to the design of the conical-approximation Wolter I optics employed by the balloon-borne High Energy Focusing Telescope, using W/Si as the multilayer materials. In additio...

This work investigated the microstructure and mechanical property of high-boron multi-component alloy with Fe, B, C, Cr, Mo, Al, Si, V, Mn different contents Ti. The results indicate that as-cast metallurgical alloys consist ferrite, pearlite borocarbide. In an un-modified alloy, continuous reticular structure borocarbide is observed. After titanium addition, changes into a fine isolated morpho...

A series of compounds with compositions Fe 5 Si 1-x Ge x B 2 were synthesised and their structural magnetic properties investigated. The Mo SiB -type structure tetragonal I 4/ mcm space group is maintained for all < 0.15 , which estimated as the compositional limit system. unit cell parameters expand content before reaching a plateau = 5.5581(1) c 10.3545(1) Å at . saturation magnetisation ( M ...

Crystalline-Si (c-Si) solar cell with black Si (b-Si) layer at the rear was studied in order to develop c-Si solar cell with sub-band gap photovoltaic response. The b-Si was made by chemical etching. The c-Si solar cell with b-Si at the rear was found to perform far better than that of similar structure but with no b-Si at the rear, with the efficiency being increased relatively by 27.7%. This ...

In tro duc tion: Gil be rt’s syndro me is the mo st com mon he re di ta ry di sor der of bi li ru bin me ta bo li sm. The cau sa ti ve mu ta tion in Cau ca sia ns is al mo st exclu si ve ly a (TA) di nuc leo ti de in ser tion in the UG T1A1 pro mo ter. Aff ec ted in di vi dua ls are ho mo zygous for the va ria nt pro mo ter and ha ve 7 TA re peats in stead of 6. Pro mo te rs wi th 5 and 8 TA re...