Mg-Cu alloys with different phases were electrodeposited in a molten LiCl-KCl eutectic mixture containing a small amount (0.5 mol%) of MgCl2 at 673 K. The electrochemical behavior of the Mg-II ion and alloy formation processes were studied at inert molybdenum (Mo) and active copper (Cu) electrodes in the molten salts, respectively. Different electrochemical techniques, such as cyclic voltammetry, square-wave voltammetry, chronoamperometry, and open-circuit potentiometry were carried out to investigate the electrochemical formation mechanism of Mg-Cu alloys. Three signals, corresponding to the formation of metal Mg and two different Mg-Cu alloy phases, are observed when using cyclic voltammetry, square-wave voltammetry, and open-circuit potentiometry. Chronoamperometry studies indicate the different interfacial properties of the magnesium metal versus the Mg-Cu alloys. The results of X-ray diffraction and scanning electron microscopy show that the MgCu2 and Mg2Cu phases could be obtained at -2.30 and -2.38 V (vs. Pt), respectively.

The FPGA design and application is electronic professional course include software and hardware.Now, FPGA design curriculum has a lot of problems, for example, lacking of systematic arrangement, unbalanced school distribution , the single simulation software, limited commined training, and so on, the teaching reform is urgently needed.This paper,presents a teaching mode of theory teaching,basic experiment,comprehensive experiment and the mobileapp.In addtion, the comprehensive ability is improved by Opening curriculum design. Thus, the innovation ability and the independent ability of solving the problem is enhanced.

ZnSe/TiO2−xNx composite nanoparticles with the average grain size of about 20nm were fabricated by the hydrothermal–solvothermal method. The result of HRTEM confirmed the formation of heterostructures in the composite samples. Slight absorption edge red-shifts were observed in the absorption spectra after modifying TiO2−xNx with ZnSe. The photoacatalyic activity for the degradation of methylene blue solution over TiO2−xNx was obviously enhanced after coupling with ZnSe. The sample of 2% ZnSe/TiO2−xNx exhibited the best photocatalytic performance among the prepared samples. However, the photocatalytic activity of the sample was depressed as the ratio of Zn:Ti increases to 5% because the surface active sites of the photocatalyst were covered by ZnSe nanoparticles.

Fluorine and yttrium codoped TiO2 nanoparticles were prepared using a simple sol-gel method. The products were characterized with various spectroscopic and analytical techniques to determine their structural, morphological, optical absorption and photocatalytic properties. The results reveal that neither F nor Y doping causes obvious absorption edge shift in TiO2. Photoluminescence (PL) emission spectra present that the PL signal is enhanced, suggesting a decrease of photo-generated charge carrier separation efficiency, after the F or Y doping. The synergistic action by the F and Y doping leads to the highest photocatalytic activity for the degradation of methylene blue solution in the 0.05% (F,Y)-codoped sample (15 times of that over the pure TiO2). With the increase of Y doping level, the photocatalytic performance in the codoped samples increases firstly and then decreases. The photocatalytic activity variations after the F and Y doping were interpreted by the formation of photocatalytic reactive oxygen species induced by the dopings. (C) 2014 Elsevier Ltd. All rights reserved.

One-dimensional SrTiO3/TiO2−xNxnanostructures were prepared by the hydrothermal method and investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS) measurements. The photocatalytic activities of the prepared samples were evaluated by photodegrading the methylene blue (MB) solution. According to the characterizations, the intermediate product of SrTiO3/titanate nanotubes was presented after hydrothermal processing of the TiO2−xNxnanoparticles with the mixed solution of NaOH and Sr(NO3)2. The final product of SrTiO3/TiO2−xNxnanorods was obtained after calcining the intermediate. As compared to the TiO2−xNxnanoparticles, the absorption performance of SrTiO3/titanate nanotubes or SrTiO3/TiO2−xNxnanorods was depressed, instead of improving it. The mechanisms of the absorption property changes were discussed. The SrTiO3/TiO2−xNxnanorods presented better photocatalytic activity than the TiO2−xNxnanoparticles or nanorods. However, due to overmuch adsorption, the SrTiO3/titanate nanotubes gave ordinary photocatalytic performances.

Iron and iodine single doped and co-doped TiO_2 nanocrystalline were prepared by the sol-gel method and investigated by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS) and ultraviolet-visible(UV-Vis) diffuse reflectance spectroscopy,respectively.The photocatalytic properties of the samples were evaluated by photocatalytic degrading methylene blue.The results show that all the samples are compose of the anatase phase and the average grain size is 7-15 nm.After the doping,the absorption properties of the samples obviously enhanced.After introducing I into TiO_2,the photocatalytic activity of the sample is greatly improved due to the decrease of grain size and extending of optical absorption region.With the increase of Fe doping level,the photocatalytic activities of the codoped samples increase and then decrease gradually.The best photocatalytic property is presented in the codoped sample with 0.2%Fe doping.The mechanisms of the photocatalytic property changes were further discussed by several factors such as grain size,absorption performance and band structure.

Objective: The solid powder of Forsythin reference substance was determinated using the confocal microscopy laser Raman spectrometer and ordinary Raman spectrometer respectively,then the advantages and disadvantages of two spectra that we had obtained were summarized.Method:RM-1000 confocal microscopy laser Raman spectrometer and ordinary Raman spectrometer were used to determinate the solid powder of Forsythin reference substance.Raman peaks of the two spectra were compared and the result was analyzed.Result: The two kind of spectra showed main characteristic peaks of Forsythin.They can both be used for qualitative identification of Forsythin;Fingerprint peak had not been showed in the spectrum which is obtained with ordinary Raman spectrometer,and its peak intensity was significantly weaker than the other one.Conclusion: Using the confocal microscopy laser Raman spectrometer has feasibility of getting the Raman spectrum of effective ingredients in traditional Chinese medicine.Its identification of active ingredients for traditional Chinese medicine has obvious advantages.

In order to assess the quality of the forsythia leaves gathered in different periods rapidly,their Raman spectra were obtained with RM-1000 confocal microscopy laser Raman spectrometer,then the specific peaks of their Raman spectra were obtained after analysis and experiments.The Raman spectra of forsythia leaves show the main characteristic peaks are mainly in the range of 700cm~(-1)～ 1600cm~(-1)and 2600cm~(-1)～ 3100cm~(-1).The characteristic peaks are closely related with forsythin which is considered as the main active ingredient in the forsythia leaves and can be used for qualitative identification.The peak intensity in the spectra of forsythia leaves gathered in different periods is significantly different so that the quality of forsythia leaves can be evaluated.Raman spectra can be used for qualitative identification and evaluation of forsythia Leaves and it is direct,fast,simple and accurate.The results are useful for quality control of the traditional Chinese medicine.

目的:比较丙泊酚复合不同剂量瑞芬太尼在经喉罩通气纤维支气管镜检查中的效果。方法:120例ASAⅠ～Ⅱ级,需行纤维支气管镜检查的患者,随机分成3组,每组40例。均于检查前静脉滴注复方氯化钠注射液10 mL/kg,入室前肌内注射阿托品0.5 mg,雾化吸入2%利多卡因10 min。入室后丙泊酚2 mg/kg,瑞芬太尼2μg/kg诱导后置入喉罩。瑞芬太尼A组0.5μg/(kg.min),B组0.7μg/(kg.min),C组0.9μg/(kg.min)持续静脉泵注,有体动或呛咳时追加丙泊酚0.5 mg/kg。分别记录麻醉前(T0)、诱导后(T1)、气管镜入声门时(T2)、取活检时或刷检时(T3)、清醒时(T4)的平均动脉血压、心率;比较3组患者麻醉效果、检查后头痛、恶心、呕吐发生率及苏醒时间。结果:3组患者麻醉效果B、C组优于A组,苏醒时间B、C组较A组短,但C组患者术后恶心呕吐发生率明显高于A、B组;术中平均动脉压及心率虽在T3时C组与A、B组比较差异有统计学意义,但无临床意义。结论:丙泊酚复合瑞芬太尼0.7μg/(kg.min)在经喉罩通气纤维支气管镜检查时麻醉效果最优。

<正>高校实验教学是高校相应专业教学体系的一个基本部分,其成效在一定程度上决定了学生专业素质的发展程度。特别是物理实验,是许多理工类专业的必修课。当前的高校普通物理实验教学在教学内容、方式和测评等各个环节都存在诸多问题。因此,

To analyze the content of Forsythin in leaves gathered in different periods with laser Raman spectroscopy using the method of internal standard.The Raman peak of furan ring in Forsythin which is considered as νs C-H(2844 cm-1) and the peak of methanol which is considered as νasCH3-O(2975 cm-1) in the confocal microscopy Raman spectra of Forsythin methanol solution were selected as quantitative peak and internal standard reference peak respectively.Take the ratio of the intensity as relative peak intensity.Plot the standard curve and inspect the linear and recoveries.The linear relationship of Forsythin concentration and relative peak intensity is good in the range of 1.1 mol·L-1×10-5-3.5×10-4 mol·L-1(5.9 mg·mL-1-189.1 mg·mL-1),r=0.9980.The detection limit is 5.2×10-6 mol·L-1.The results of precision,repeatability and recoveries show that this method has good precision,repeatability and accuracy.Contents of Forsythin in leaves gathered in different periods were measured and the results show that this method is simple,fast,efficient and sensitive and it can be used for quantitative analysis of Forsythin.Raman spectroscopy with internal standard method for quantitative analysis of Forsythin is simple and without the addition of other reagents.It can be used for quantitative analysis of drugs.

本文深入分析了非专业本科层次<Photoshop平面处理>课程的教学特点以及传统教学方法在教学时的弊端,介绍了基于素质教育思想的"开放式"教学法的内容、在该课程课堂教学各个环节中的应用以及取得的良好效果.

In this study,Fourier Transform Infrared(FTIR) spectroscopy is applied for the study of regional background atmospheric aerosol.The technique was used for the investigation of water extracts of the aerosol samples.The absorption frequencies of the soluble ions in aerosol are obtained.The results can confirm and complete the results of the other analytical methods corresponding to the chemical composition of the atmospheric aerosol.

A surface potovoltage spectroscopy(SPS) experiment system is set up,which consisted of lock-in amplifier,monochromator and Xe lamp.Based on the theory of surface potovoltage spectroscopy and electric field-induced surface photovoltage spectroscopy(EFISPS),potovoltage response,conduction type,band-gap and distribution of surface charge are measured.

An effectual method is presented to determine the profiles of a tungsten (W) layer, such as the density, the thickness and the roughness in the multilayer structures, using the x-ray reflectivity technique. To avoid oxidation effects of tungsten, a B4C capping layer is deposited onto to the W layer. To observe the profiles of the tungsten layer with different thicknesses, three groups of W/B4C bilayers with different thicknesses are prepared by using ultra high vacuum dc magnetron sputtering and measured by an x-ray diffractometer. A type of genetic algorithm called the differential evolution is used to simulate the measurement data so as to obtain the parameters of bilayers. According to the simulation, it is shown that the W layer density varies from 95.26% to 97.51% compared to the bulk. In our experiment, the deposition rate is 0.044 nm/s, and the thickness is varied in the range of 9.8–19.4 nm.

Experimental results on aperiodic broadband transmission molybdenum/silicon multilayer phase retarders for the extreme ultraviolet range are presented. The broadband phase retarders were designed using a numerical method and made using direct current magnetron sputtering on silicon nitride membrane. The polarization properties of these aperiodic transmission phase retarders have been investigated using the soft x-ray polarimeter at BESSY-II. The measured phase shift was about 42° in the wavelength range of 13.8–15.5nm, and the corresponding s-component transmission (Ts) decreased from 6% to 2% with increasing wavelength.

The high reflectance orders are used to improve the spectral resolution of Mo/Si multilayers. The multilayers for the first-, second- and third-order reflectance are designed and optimized, respectively. These multilayers are fabricated by using a directed current magnetron sputtering system, and the reflectivity is measured in an extreme ultraviolet range by synchrotron radiation. The experimental results show that the spectral resolution λ/Δλ (λ = 14 nm) increases from 24.6 for the first order to 66.6 for the third order.

The status of polarizing optical elements for the soft x-ray range is reviewed. The criteria for optimum polarization of soft x-ray reflective analyzers, transmission polarizers and phase retarders based on multilayer interference structures are presented. Following these principles, soft x-ray polarizing optical elements have been designed. Designs of broad angular and wavelength range reflective analyzers based on a combination of analytical and numerical methods are also discussed.