从外籍学生角度看大陆高校对外籍学生的管理——以厦门大学为主,兼与台湾高校对比

作者简介：郑晓，厦门大学人文学院人类学与民族学系2010级本科生；涨驰，厦门大学人文学院中文系2010级本科生；浏畅，厦门大学人文学院中文系2010级本科生；吴院琴，厦门大学人文学院人类学与民族学系2010级本科生。大陆高校对外籍学生的管理,是自新中国成立以来,特别是改革开放以来,我国教育事业面临的一个新课题。外籍学生的不断增多,一方面代表我国文化教育事业的蓬勃发展,另一方面,也使大陆高校在学生管理上面临更多挑战。本文选取有"南方之强"之称的厦门大学作为范例,采用文化人类学半结构式访谈的方法,对大陆高校在外籍学生管理方面遇到的困难进行分析,并提出相关对策。此外,本文在保持相对客观的基础上,还注重从外籍学生的视角进行观察和思考,并与台湾的相关高校进行对比,以期能够总结出一套更加有效、人性的管理模式

福建省电力工业发展与对策研究

剖析福建省电力工业现状及发展存在问题,如火电和水电比重过大、未来核电容量大、电力负荷中心与电厂空间布局不一致以及电网建设滞后等。提出了调整电力结构、合理布局电厂、加大电网投资以及加快能源储备基地建设等对策措施。核电选址中应考虑的海洋要素专题研究(国家海洋局海域管理司资助

The Phase Transition of Nematic Liquid Crystal Cells Bounded by Surfactant-Laden Interfaces

National Science Foundation of China [50873083, 10974162]Taking into account the surface-coupling strength effect, we discuss the phase transitions of a finite thickness cell bounded by surfactant-laden interfaces in a magnetic field perpendicular to the substrate and it is compared with that of a semi-infinite system. It is found that the larger the thickness, the closer the three-dimensional phase transition surface of the finite system to that of the semi-infinite one. The simulation also shows that when a magnetic field is applied to a nematic semi-infinite sample, an orientational phase transition first takes place close to the interface and then extends to the inner space as the temperature increases

Raman Spectroelectrochemical Study on Bioactive Molecules

本文概述了采用电化学现场拉曼光谱技术研究氧化物歧化酶在L 半胱氨酸修饰金电极表面的电子迁移反应以及腺嘌呤共存条件下超氧化物歧化酶在金电极表面的电子迁移反应和不同电位下银电极表面烟酰胺腺嘌呤二核苷酸的吸附等体系的反应吸附特性 .所得结果对于分析和研究生物活性分子电化学过程机理具有重要意义 .Electron?transfer reaction is known to be one of the key reactions for generating biological functions. Mechanism revelation at a molecular level of such kind reactions is to be very helpful for us to understand life essence. In fact, surface enhanced Raman scattering (SERS) is one of the most powerful tools for the study on metal?electrolyte and metal?vacuum interfaces since 1970's. Moreover, Raman spectroscopic study in enzymology has provided attractive results during last twenty?five years. For the study of electron?transfer reaction mechanism of some oxidoreductases and SERS of some other biological macromolecules, an electrochemical in situ Raman spectroscopic technique was established in author's lab and some research works have been done on it in the past two years. A brief review of these works is given in this paper. The electrochemical in situ Raman spectroscopic measurements were carried out using a Super LABRAM Raman spectrometer (Dilor, France) coupled with a CHI604A Electrochemical Analyzer (CH Instr., USA). A Teflon spectroelectrochemical cell with a quartz plate window was designed for the in situ measurements. The working electrode was pretreated with oxidation?reduction cycles for each measurement. The electrolyte solutions were purged with nitrogen prior to all measurements, and all the measurements were carried out under the nitrogen atmosphere. Copper, zinc superoxide dismutase (SOD) is an important oxidoreductase for organism metabolism. The established spectroelectrochemical technique was first used to characterize the cyclic voltammetric process of SOD at L?cysteine modified gold electrode as well as the process of electrochemical modification of L?cysteine molecules on a gold electrode. The obtained Raman spectra reveal that the L?cysteine modified gold electrode improves effectively the reversibility of electron?transfer reactions of SOD. Besides L?cysteine molecules, it was interesting that adenine was also an effective electron?transfer promoter for SOD at gold electrode. A strong peak at 355 cm -1 can be observed in the Raman spectrum of adenine molecules adsorbed on gold electrode. It was inferred that the peak maybe related to the chemical interaction between adenine molecules adsorbed and gold electrode surface. As shown in Fig.1, for the mixture of SOD and adenine at gold electrode under a polarization potential 55 mV (vs. SCE), both the characteristic Raman lines of SOD and adenine molecules appeared. Therefore it was reasonable to conclude that SOD and adenine molecules should be co?adsorbed on gold electrode surface under such a potential, which is slightly lower than the reduction peak potential of SOD on adenine?modified gold electrode. Moreover, two new peaks appeared remarkably at 445 cm -1 and 610 cm -1 are likely to be related to the active site of SOD. It suggests that the co?adsorption mechanism of SOD and adenine molecules on the gold electrode surface results in effective approaching of the active site of SOD to the electrode surface.作者联系地址：上海师范大学化学系!上海200234,上海师范大学化学系!上海200234,上海师范大学化学系!上海200234,上海师范大学化学系!上海200234,上海师范大学化学系!上海200234,上海师范大学化学系!上海200234Author's Address: Dept. of Chem., Shanghai Teachers Univ., Shanghai 200234,Chin

THE ERP EFFECTS OF INSIGHT IN A RIDDLE GUESSING TASK

采用事件相关电位 (ERP)探索问题解决过程中顿悟的神经机制。以猜谜作业为实验程序 ,对&ldquo;有顿悟&rdquo;和&ldquo;无顿悟&rdquo;答案引发的脑电分别进行叠加和平均 ,并将二者相减(有顿悟 -无顿悟)得到差异波。在 2 5 0～ 5 0 0ms&ldquo;有顿悟&rdquo;比&ldquo;无顿悟&rdquo;的ERP波形有一个更加负性的偏移 ,在差异波中 ,这个负成分的潜伏期约为 380ms(N380 )。地形图和电流密度图显示 ,N380在额中央区活动最强。偶极子源定位分析结果显示 ,N380可能起源于扣带前回。因此 ,N380可能反映顿悟问题解决过程中思维定势的突破.</p

Dynamics of a Magnetic Nanowire in Twisted Nematic Liquid Crystal

液晶中的纳米颗粒悬浮体系由于其独特的性质引起了极大的关注.采用保角变换法和等效电容法,对悬浮于扭曲型向列相液晶盒中的磁性纳米金属丝在外加恒定磁场下的动态响应行为进行了研究,并将理论计算结果与实验结果作比较.通过比较发现,理论计算结果与实验结果符合得很好.Systems of nanoparticles suspended in liquid crystal have raised great interest because of their unique property and the potential as novel materials.The dynamic behaviors of a nickel nanowire suspended in a twisted nematic liquid crystal cell under constant magnetic field are analyzed,using the methods of equivalent capacitance and conformal mapping.A comparison with experiments shows that our calculation agrees well with the experimental results.国家自然科学基金项目(50873083;10974162

猜谜作业中顿悟的ERP效应

采用事件相关电位 (ERP)探索问题解决过程中顿悟的神经机制。以猜谜作业为实验程序 ,对“有顿悟”和“无顿悟”答案引发的脑电分别进行叠加和平均 ,并将二者相减(有顿悟 -无顿悟)得到差异波。在 2 5 0～ 5 0 0ms“有顿悟”比“无顿悟”的ERP波形有一个更加负性的偏移 ,在差异波中 ,这个负成分的潜伏期约为 380ms(N380 )。地形图和电流密度图显示 ,N380在额中央区活动最强。偶极子源定位分析结果显示 ,N380可能起源于扣带前回。因此 ,N380可能反映顿悟问题解决过程中思维定势的突破

Determination of dissolved tryptophan in seawater with spectrofluorimetry

本文初步建立了直接测定海水中溶解色氨酸的方法,并进行各种条件影响实验.在0～0.070mg/dm3浓度范围内色氨酸荧光强度与浓度之间线性关系良好.在最佳实验条件下,方法检测限为7.6×10-4mg/dm3,精密度小于3.1%,回收率86%～120%.A method for direct determination of soluble tryptophan in seawater was primarily established in this paper, and the experiments various on operationconditions of this method were investigated. The calibration curve for the relation between the fluorescent intensity and concentration of tryptophan showed a straight line in the concentration range of 0～0.070mg/dm~3. Under the optimizedconditions, the limit of detection was 7.6×10~(-4)mg/dm~3, the relative standard deviations were lower than 3.1% (n=6), and the recovery retes were 86%～120%. This method can be used directly for the determination of tryptophan in seawater.国家自然科学基金资助项目(40106007