Effect of Preparation Method on the Catalytic Performance of HZSM-5 Zeolite Catalysts in the MTH Reaction.

A kind of nano-ZSM-5 zeolite crystal was synthesized by the hydrothermal method, and HZSM-5 zeolite powder was obtained via acid exchange. By using pseudoboehmite as a binder, a series of HZSM-5 zeolite catalysts for methanol-to-hydrocarbons (MTH) were prepared through adjusting the binder content between 20 and 50% in addition to the molding method of wet extrusion and mechanical mixing. XRD, Al NMR, SEM-EDS, ICP, low-temperature N adsorption and desorption, NH-TPD, Py-FTIR, FT-IR, TG and elemental analyses were used to characterize the properties of fresh catalysts and coke-deposited catalysts.

Effect of hardening and sealing on color of chemically colored stainless steel.

A light reflection device combined with visible light spectrophotometer was used to measure the reflectance-wavelength curves of colored stainless steel after coloring, hardening and sealing. After these processes, the coordinate in CIE 1931 color coordinate system and brightness of samples were confirmed by chromatometry method, and the effects of hardening and sealing processes on color were determined. In hardening process, the thickness of coloring film increases significantly, the peaks of reflectance-wavelength curves move to the long-wave region, the hue of samples changes clockwise in CIE 1931 coordinate diagram, and the trend of saturation in hardening process is consistent with the saturation of the sample having larger potential difference.

Association between gene polymorphisms and schizophrenia in the North Chinese Han population.

Background: A large number of studies have shown a close relationship between and the pathological mechanism of schizophrenia. However, to our knowledge, there has been no studies examining the association between the gene and schizophrenia in Chinese Han population.

Purpose: The objective of this study was to examine the relationship between adenosine A2A receptor () single nucleotide polymorphisms and schizophrenia in the North Chinese Han population.