[en] Synthesizing hexagonal wurtzite GaN nanowires involves nitriding Ga₂O₃ films, which deposited on GaAs(1 1 0) substrates with electrophoresis. The cylindrical structures of GaN nanowires with the diameters ranging from 40 to 200 nm and lengths up to over 100 μm have been obtained. Scanning electron microscopy (SEM) images showed the morphologies of the one-dimensional single crystal materials containing straight and curved nanowires. GaN spherical crystals attached to the fibers with diameters about 600 nm were detected for the first time. The synthesis of one-dimensional GaN nanowires can be achieved without assistance of a template of a catalyst

[en] High quality gallium nitride thin films have been successfully grown on the Ga-diffused Si(1 1 1) substrates through ammoniating Ga₂O₃ thin films deposited by r.f. magnetron sputtering. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), atomic force microscope (AFM) and photoluminescence (PL) were used to characterize the synthesized samples. The analyses reveal that the formed films are high quality polycrystalline hexagonal gallium nitride. The as-formed GaN films show a flat surface topography with RMS roughness varied from 29 to 48 A. The strong near-band-edge-emission peak around 368 nm was observed at room temperature. This is a novel method to fabricate GaN thin films based on the direct reaction between Ga₂O₃ and NH₃ on the Ga-diffused Si(1 1 1) substrates

[en] This Letter reports the relationship between intermetallic compound formation and glass forming ability of Al-La-Ni alloy. By controlling over cooling rate, the Al₈₈Ni₆La₆ amorphous alloy could be obtained at a circumferential speed of 22.00 m s^-1. The intermetallic compounds, La₃Al₁₁ and Al₂La, in the partially amorphous Al₈₈Ni₆La₆ alloy which was formed at circumferential speeds of 8.25 m s^-1 and 11.00 m s^-1, have been identified by X-ray diffraction (XRD). The crystallization kinetics of Al₈₈Ni₆La₆ amorphous alloy is studied by differential scanning calorimetry (DSC). Continuous heating XRD patterns of Al₈₈Ni₆La₆ amorphous alloy shows that the first peak on its DSC curve (around 230 deg. C) corresponds to the precipitation of the fcc-Al phase and the second peak around 330 deg. C corresponds to the formation of intermetallic compounds. The DSC results indicate that the first peak is little affected by the cooling rate. It is believed that the formation of La₃Al₁₁ has more significant effect on glass forming ability of Al-Ni-La alloy than that of fcc-Al

[en] With the development of clean coal technology, modern coal-fired power plants have achieved the similar emission standards as gas power plants. However, due to the impressions of high pollution and high emission in traditional coal-fired power plants, such projects are often opposed by local residents, which hinder the promotion of this technology. This manuscript aims to investigate public attitudes toward these projects and to analyze the influencing mechanisms of the factors of public support. The conceptual model was built with sense of place, trust and environmental attitude as the independent variables, benefit and cost perceptions as the mediating variables and public support as the dependent variable. The model was tested and modified by structural equation modelling. The results revealed that sense of place had a slight indirect impact (−0.043) on public support through benefit perception, whereas trust had a direct impact (0.332) on public support and indirect impacts (0.298) through benefit and cost perceptions. Environmental attitude had indirect impacts on public support through benefit perception (0.180) and cost perception (−0.115). In addition, policy suggestions on decision-making, project publicity and compensation strategy are proposed to enhance public support for similar projects. - Highlights: • This manuscript aims at eliminating the NIMBY effects on modern coal-fired power plant project. • A SEM model is proposed to explore how potential factors affect public support. • Trust is the dominant influencing factor to improve public support with both direct and indirect impacts. • Environmental attitude can also have positive effect on public support through rational compensation plans.

[en] March 11, 2011, a huge earthquake and tidal waves in Japan lead to dangerous levels of nuclear leakage at Fukushima nuclear plant, the nuclear accident also cause public panic m many countries. To investigate the reason of the public panic, we employ the theories of sociology and psychology, analyzed that the public panic come from Ignorant Panic. Herd Behavior, Primacy Effect, Stereotype Activation Effect, and the superposition of these effects. In addition, we proposed three measures to the public panic: First, we should emphasize the safety of nuclear power and establish the positive image of nuclear power Second, we should emphasize the popular science of nuclear power so that nu clear power can be accepted in the public; Third, we should enhance the psychological intervention system for nuclear safe emergency and improve the effect of psychological intervention

[en] We present a molecular dynamics simulation within the framework of empirical tight-binding potential on the liquid structure of Au under different pressures during the rapid cooling process. The pair correlation function (PCF) and the pair analysis (PA) technique are used to reveal the structural characteristics of liquid Au under normal and high pressures. The split of the second peak of g(r) is associated with the glass transition at the cooling rate of 2.06x10¹³ K/s under different pressures. The nearest distance is shortened under high pressures. High-pressure is in favor of FCC-type and BCC-type atomic clusters. The number of icosahedral structures increases in the high temperature region as pressure increase, while high-pressure is not preferable for icosahedra at low temperature. With the increase of the pressure, the possibility that the system forms crystalline structure is enhanced. The influence of a higher pressure on the microstructure of liquid metal is much clearer than that of a lower pressure

[en] Short communications only

[en] Objective: To explore the clinical significance of measurement on the changes of serum Hcy hs-CRP and TGF-β₁ levels after treatment in patients with ACI. Methods: Serum Hcy(with immunochemistry), serum hs-CRP(with immunoturbidimetry), serum TGF-β₁ (with RIA) levels were determined in 32 patients with ACI and 35 normal healthy controls. Results: Before treatment, serum Hcy, hs-CRP and TGF-β₁ levels in the patients were significantly higher than those in controls (P < 0.01). After treatment for l month, serum Hcy, hs-CRP and TGF-β₁ levels were no significant difference(P > 0.05). Serum Hcy level showed positively correlated with hs-CRP, TGF-β₁ levels(r = 0.6146, 0.5784, P < 0.01). Conclusion: Detection the changes of serum Hcy, hs-CRP and TGF-β₁ levels after treatment in patient with ACI might be helpful to monitor efficacy of therapy and prognosis. Therefore, possess important clinical value. (authors)

[en] In the article, the method of standard addition was used for determining trace uranium in samples of Huangpu River, Yangtze River, tap water, rain and snow in Shanghai by the laser induced fluorescence method, and compared from different source contents, The results showed that radioactive uranium contents in drinking water was 0.12∼0.23 u g/L, ground water was 0.12∼0.80 u g/L, underground was 0.25∼0.69 u g/L, which is within the range of the normal background, environment does not contaminated by radioactive materials

[en] A series of Ce"3"+ or Tb"3"+ doped and Ce"3"+/Tb"3"+ co-doped Ba_2ZnSi_2O_7 phosphors were prepared via the conventional high temperature solid state reaction method. The photoluminescence and energy transfer properties of samples were studied in detail. The optimal proportion of Ce"3"+ single doping is 2 mol% with maximal fluorescence intensity. Ba_1_._9_8_−_xZnSi_2O_7:0.02Ce"3"+, xTb"3"+ shows both a blue emission (428 nm) from Ce"3"+ and a yellowish-green emission (542 nm) from Tb"3"+ with considerable intensity under ultraviolet (UV) excitation (352 nm). The emission chromaticity coordinates can be adjusted from blue to green region by tuning the concentration of Tb"3"+ ions from 0.00 to 0.06 through an energy transfer process. The energy transfer mechanism from Ce"3"+ to Tb"3"+ ions was proved to be dipole–dipole interaction. The Ce"3"+ and Tb"3"+ co-doped Ba_2ZnSi_2O_7 phosphors are potential UV-convertible candidates with green light emitting in UV-LEDs for the high efficient energy transfer from Ce"3"+ to Tb"3"+ ions. - Highlights: • The emission color can be adjusted from blue to green region by tuning the concentration of Tb"3"+ ions. • There is very high transfer efficiency with the maximal value 84.4% from Ce"3"+ to Tb"3"+. • The energy transfer mechanism from Ce"3"+ to Tb"3"+ ions was proved to be dipole–dipole interaction