几种醇类的固态电致化学发光-高效液相色谱检测

使用水／油反相微乳法合成包埋联吡啶钌（Ru（bpy）3^2＋）的纳米硅球（RuSiNPs）,利用Nation材料固定RuSiNPs于玻碳电极上,构筑了RuSiNPs／Nafion复合膜修饰传感电极,进行了醇类的电致化学发光一高效液相色谱（ECL-HPLC）分离检测．利用循环伏安等方法考察了RuSiNPs／Nafion复合膜电极的电化学和ECL行为,结果表明包埋在硅球里的Ru（bpy）32＋较好地保持了原有的光学和电化学性质．研究了实验条件对其ECL的影响,通过HPLC条件的优化建立了利用RuSiNPs／Nafion固态ECL进行醇类样品的分离检测方法,所提出方法对甲醇、乙醇、丙醇和丁醇的检测下限分别为6．7×10^5,8．2×10^5,3．9×10^-4和4．2×10^-4mmol／L．方法被初步应用于一些啤酒样品中醇的检测．     

Li_4Ti_5O_(12)/(Ag+C)极材料的固相合成及电化学性能

以Li_2CO_3,TiO_2为原料,葡萄糖为碳源,采用固相煅烧工艺合成了亚微米级的Li_4Ti_5O_(12)/C复合负极材料.并将之与AgNO_3复合,采用固相方法制备出了Ag表面修饰的Li_4Ti_5O_(12)(AG+C)复合材料.采用XRD、SEM和TEM测试方法对材料的微结构进行了表征.结果表明,C的存在对Ag单质在Li_4Ti_5O_(12)/C颗粒表面的大量形成起到了积极的促进作用.从而很大程度地提高了Li_4Ti_5O_(12)/C的电导率,因此有效地改善了其电化学性能.在1C倍率下,Li_4Ti_5O_(12)/(Ag+C)复合材料的首次放电容量达到了164 mAh·g(-1).     

新型常山碱类似物的合成

鸡球虫病是由艾美球虫属(Eimeria)球虫寄生于鸡肠上皮细胞内引起的一种寄生虫病,对鸡的致病率高,危害严重.据估计,全球每年因鸡球虫病造成的经济损失可达20亿美元.目前防治本病仍然以饲料中系统地添加化学药物的方法为主[1-2].但由于对药物长期连续或不合理使用,鸡球虫产生了严重的耐药性,导致抗球虫药物使用年限缩短,防治失败或效果不佳,造成很大的经济损失,解决方法之一是不断研制新的抗鸡球虫药物[2-3].     

流动注射化学发光法测定呋塞米

在酸性条件下呋塞米对Ce(Ⅳ)-Na_2SO_3弱化学发光体系具有很强的增敏作用,据此建立了流动注射化学发光法测定呋塞米的新方法.该法测定呋塞米的线性范围为0.01～1.0 mg/L,检出限为4×10~(-3)mg/L(3σ),RSD为2.2%(n=11,ρ=0.2mg/L),回收率为95%～105%.该法已应用于片剂和针剂中呋塞米含量的测定.     

小型可调谐单纵模TEA CO2激光器

对在三镜腔中插入法布里-珀罗(F-P)标准具实现单纵模激光输出的方法进行了分析,计算了激光器的输出特性。设计研制了一台单纵模可调谐TEA CO2激光器。采用在三镜腔中插入F-P标准具的方法实现了单纵模激光的调谐输出。当激光器以5 Hz重复频率运转时,得到9P(16)谱线能量大于200 mJ,脉冲宽度约为150 ns。     

Implementation of a Controlled-NOT Gate Using Superconducting Quantum Interference Devices

A scheme is proposed for implementing a controlled-NOT gate via superconducting quantum interference device （SQUID） in cavity-QED. The controlled-NOT gate can be achieved by coupling the SQUID to a single-mode microwave cavity field or classical microwave pluses. The scheme may be experimentally realizable.     

Photoluminescence of Electrospun Poly-Methyl-Methacrylate:Alq3 Composite Fibres

Tris（8-hydroxyquinoline） aluminium doped poly-methyl-methacrylate （PMMA：Alq3） composite nanofibres are fabricated by electrospinning. The morphology of fibres is characterized by scanning electron microscopy. The photoluminescence of a series of the nanofibres with various contents of Alq3 to PMMA is investigated. UVvisible absorption and the PL spectra analysis are employed to analyse the interaction between the polymer and the luminescent molecule.     

Ag-TiO2和Au-TiO2复合薄膜光催化降解偶氮染料酸性大红GR的研究

以玻璃珠为载体,溶胶-凝胶法制Ag-TiO2和Au-TiO2复合薄膜,研究了水溶液中的偶氮染料酸性大红GR进行了固定相光催化氧化以及银和金的掺杂量、染料水溶液的pH值、光源、催化剂的重复使用性等因素的影响.负载型复合光催化剂Ag-TiO2和Au-TiO2的光催化活性显著提高.当Ag和Au掺杂TiO2的质量分数分别为0.4%和0.6%时,最高光解率分别提高了2.1倍和1.8倍.     

IMPROVED ESTIMATES OF THE COVARIANCE MATRIX IN GENERAL LINEAR MIXED MODELS

In this article, the problem of estimating the covariance matrix in general linear mixed models is considered. Two new classes of estimators obtained by shrinking the eigenvalues towards the origin and the arithmetic mean, respectively, are proposed. It is shown that these new estimators dominate the unbiased estimator under the squared error loss function. Finally, some simulation results to compare the performance of the proposed estimators with that of the unbiased estimator are reported. The simulation results indicate that these new shrinkage estimators provide a substantial improvement in risk under most situations.     

WEAK ORLICZ SPACE AND ITS CONVERGENCE THEOREMS

In this article, a class of weak Orlicz function spaces is defined and their basic properties are discused. In particular, for the sequences in weak Orlicz space, we establish several basic convergence theorems including bounded convergence theorem, control convergence theorem and Vitali-type convergence theorem and so on. Moreover, the conditional compactness of its subsets is also discussed.