酸性品红与蛋白质结合反应的研究及应用

在pH1.4的Clark-Lubs缓冲介质中，蛋白质与酸性品红反应形成结合物，该结合物的最大吸收波长为576nm，与酸性品红相比，红移了34nm。据此拟定了分析方法，制定了牛血清白蛋白(BSA)、人血清白蛋白(HAS)、γ-球蛋白(γ-G)和酪蛋白的工作曲线，测定的摩尔吸光系数均在10^5数量级，用于人血清中总蛋白的测定，结果与溴甲酚绿(BCG)法基本一致。     

Investigation of radical cation in electrophilic fluorination by ESI-MS

Reaction solutions of selectfluor (1) with triphenylethylene (4a) and tetraphenylethylene (4b) were monitored by ESI-MS and ESI-MS/MS. Detection and characterization of the key radical cationic intermediates 5a.+ and 5b.+) fully supports the SET mechanism in electrophilic fluorination as depicted above. [reaction: see text]     

Synthesis and Crystal Structure of a Novel Three-dimensional Cu(II) Compound {[Cu(2,2''-bipy)(C7H4O5S)(H2O)2]·(H2O}n

The title compound, {[Cu(2,2'-bipy)(C7H4O5S)(H2O)2](H2O}n (2,2'-bipy = 2,2'- bipyridine), was synthesized by the hydrothermal reaction of Cu(NO3)2(3H2O, 2,2'-bipyridine and 2-sulphobenzoic acid, and structurally characterized by single-crystal X-ray diffraction analysis. The crystal is of triclinic, space group P with a = 9.21(3), b = 10.17(3), c = 10.77(3) (A), α = 77.017(16), β = 89.80(8), γ = 68.46(7)°, V = 911(5) (A)3, Z = 2, (D/s)max = 0.001, Mr = 473.94, Dc = 1.728 g/cm3, μ(MoKα) = 1.365 mm-1, F(000) = 486, the final R = 0.0246 and wR = 0.0628 for 3809 observed reflections with I > 2σ(I). The mononuclear crystal structure extends into a two-dimensional net- work via hydrogen-bonding interactions and a three-dimensional framework is further formed by means of π-π stacking interactions.     

基于交叉共轭结构的功能材料

近年来,人们对交叉共轭体系的制备、性能以及理论研究方面产生了极大的兴趣。本文综述了近期国内外在交叉共轭体系研究方面取得的一些最新进展,重点介绍了其在自组装、有机电致发光和离子检测等方面的最新发展动态。最后还对本课题组在交叉型p-n双嵌段寡聚物方面的研究作了详细的介绍,并对一些热点问题作了展望。     

生物大分子印迹聚合物研究进展及其应用

介绍了生物大分子印迹技术及其印迹聚合物的研究进展,其中包括对蛋白质、核酸、微生物细胞进行分子印迹所采用的印迹方法、机理以及存在的问题,最后简要探讨了生物大分子印迹聚合物在医学研究中的应用前景。     

HPLC–MS Analysis of Isoniazid in Dog Plasma

A simple, rapid, and sensitive liquid chromatography–mass spectrometric (LC–MS) method was developed and validated for the determination of isoniazid in dog plasma. Plasma samples were deproteined with methanol and separated on a C₁₈ column interfaced with a single quadrupole mass spectrometer, using 0.1% formic acid–acetonitrile (91:9 v/v) as mobile phase. Detection was performed by positive electrospray ionization with selected ion monitoring at m/z 138 for isoniazid and 152 for entecavir maleate internal standard. Linearity was obtained over the range of 25–5,000 ng mL^?1, with a lower limit of quantification of 25 ng mL^?1. The intra- and inter-day precision was less than 2.7% in terms of relative standard deviation. Accuracy, expressed as relative error, ranged from ?2.0 to 8.0%. Plasma samples were analysed within 5 min. The method was successfully applied to the evaluation of the pharmacokinetics of isoniazid in dog plasma.     

PPC/SBR并用弹性体的配方选择

利用正交法对丁苯橡胶（SBR）／聚丙撑碳酸酯（PPC）共混弹性体进行配方设计，得到了一个具有良好综合性能的配方。并通过方差分析得出PPC含量和马来酸酐（MA）用量是影响弹性体拉伸性能的最显著因素。     

A new piezoelectric response model for population growth of bacteria

A piezoelectric response model on the population growth of microorganism is proposed. This model is based on a novel population growth model, which has a more obvious ecological meaning and the fact that the series piezoelectric quartz crystal (SPQC) sensor responses to conductivity changes of the medium during the growth of the microorganism. From the response model four parameters can be obtained including the maximum specific growth rate mu(m), saturated population size N(m), and two constants C and K(1). The influence of the parameters on the response curve is discussed in which the influences of mu(m) and N(m) are more obvious. With the proposed model the quantitative determination of bacteria may be more accurate than the frequency detection time (FDT) method. Then the growth of Escherichia coliform (E. coli) monitored with a SPQC sensor is compared with the simulated growth curve obtained by the proposed model and a good agreement is obtained.     

催化裂化汽油脱硫添加剂USY/ZnO/Al2O3的性能评价

 在固定流化床催化裂化装置上，以减压蜡油为原料，对制备的U\r\nSY／ZnO／Al2O3催化裂化汽油脱硫添加剂的性能进行了评价．结果表明\r\n，随着添加剂添加量和剂油比的增加，生成汽油的硫含量降低．在500\r\n℃和剂油比为5的条件下，在FCC平衡催化剂中添加30％的添加剂时，汽\r\n油的硫含量可由不加添加剂时的1230μg／g降低到770μg／g左右．添\r\n加剂的添加量（10％）较低时，对催化裂化产物的分布基本没有影响；\r\n添加30％的添加剂时，焦炭的产率有所增加，但汽油收率基本不变．X\r\nRD表征结果表明，USY／ZnO／Al2O3添加剂中的ZnO对USY的晶相结构有\r\n一定的破坏作用，但随着反应与再生次数的增多，ZnO与Al2O3之间形成\r\n较为稳定的锌铝尖晶石结构，使添加剂的性能趋于稳定．     

Electrochemical sensing in microfluidic systems using electrogenerated chemiluminescence as a photonic reporter of redox reactions

This paper describes a microfluidics-based sensing system that relies on electrochemical detection and electrogenerated chemiluminescent (ECL) reporting. The important result is that the ECL reporting reaction is chemically decoupled from the electrochemical sensing reaction. That is, the electrochemical sensing reaction does not participate directly in the ECL process, but because electrochemical cells require charge balance, the sensing and ECL reactions are electrically coupled. This provides a convenient and sensitive means for direct photonic readout of electrochemical reactions that do not directly participate in an ECL reaction and thus broadens the spectrum of redox compounds that can be detected by ECL. The approach can be implemented in either a two-electrode or bipolar (single-electrode) configuration. By manipulating the placement and dimensions of the conductors, the photonic response can be enhanced. The system is used to electrochemically detect benzyl viologen present in solution and report its presence via Ru(bpy)(3)(2+) (bpy = 2,2'-bipyridine) luminescence.