STUDY ON THE REDOX PROCESS OF BILIRUBIN AND BILIVERDIN AT PLATINUM-ELECTRODE BY IN-SITU SPECTROELECTROCHEMISTRY

The electrochemical redox behavior of bilirubin (BR IValpha), biliverdin (BV IValpha) and their oxidized product bile-purpurin (Bi-Pu) have been studied by in situ spectroelectrochemical techniques, which reveals that the transformation of BR IValpha [GRA

酶直接电化学与第三代生物传感器

本文详细地评述并展望了酶直接电化学与第三代生物传感器这个领域已取得的成果,主要内容涉及生物电催化的三个发展阶段,实现酶与电极之间的直接电子转移方法和相应机理、以及第三代酶传感器的研制.

CeO_2纳米晶的光电量子尺寸效应

ＣｅＯ_２纳米晶的光电量子尺寸效应王德军，崔毅，李铁津，董相廷，洪广言（吉林大学化学系，长春，１３００２３）（中国科学院长春应用化学研究所，长春）关键词纳米晶，ＣｅＯ_２，表面光伏，量子限域纳米材料结构功能特性的研究有着重要的高科技应用背景［１］，但有...

X-射线荧光光谱法分析面粉、大米中的微量元素

本方法是将消解后的面粉和大米样品溶液滴加于粘贴在聚酯薄膜上的薄纸片上,用薄纸片来控制样品面积及富集被测元素,用于X-射线荧光光谱分析。该方法只用被测元素的标准溶液计算回归方程的系数,无需大量的标样,针对不同的元素选择不同的扣除背景的方法和不同的回归方程,使结果更准确。通过测定样品中的K、Ca、Mn、Zn、Fe、Cu、As、Se等元素,并与美国NBS标样参考值比较,结果基本一致。

Characteristics of nonlinear internal waves observed in the northern South China Sea

The South China Sea (SCS) is one of the most active areas of internal waves. We undertook a program of physical oceanography in the northern South China Sea from June to July of 2009, and conducted a 1-day observation from 15:40 of June 24 to 16:40 of June 25 using a chain of instruments, including temperature sensors, pressure sensors and temperature-pressure meters at a site (117.5A degrees E, 21A degrees N) northeast of the Dongsha Islands. We measured fluctuating tidal and subtidal properties with the thermistor-chain and a ship-mounted Acoustic Doppler Current Profiler, and observed a large-amplitude nonlinear internal wave passing the site followed by a number of small ones. To further investigate this phenomenon, we collected the tidal constituents from the TPXO7.1 dataset to evaluate the tidal characteristics at and around the recording site, from which we knew that the amplitude of the nonlinear internal wave was about 120 m and the period about 20 min. The horizontal and vertical velocities induced by the soliton were approximately 2 m/s and 0.5 m/s, respectively. This soliton occurred 2-3 days after a spring tide.

胶州湾生态系统主要生态因子的长期变化

该文首先针对胶州湾生态系统观测站(JERS)积累的大量历史资料中存在的问题,根据生态学规律,对这些数据文件和其中的生态项目予以编码编排,对不同时间、航次调查的站位进行逻辑处理,根据胶州湾生态数据所具有的空间属性,运用MapBasic语言对地理信息系统软件Mapinfo进行二次开发,研制出了"胶州湾生态系统数据库".运用统计学方法对胶州湾生态系统主要生态因子进行时间序列分析和系统研究,发现胶州湾海域海水化学耗氧量自20世纪90年代以来呈现持续上升状态,尤其进入98年以后迅速上升,表层化学耗氧量1998年比1991年增加44.7%.研究还发现胶州湾海域亚硝酸氮、硝酸氮和氨氮自20世纪60年代以来都有了大幅度的上升,磷的含量则在80年代达到最高,90年代以来略有下降;而胶州湾海域硅酸盐的含量自80年代以来呈现持续下降状态,90年代比80年代降低了63.6%.胶州湾的浮游植物多样性指数虽然自90年代以来处于上升趋势,但作为食物链中重要环节的浮游动物的多样性指数却处于持续下降状态.

Job change and workplace learning in the public sector: the significance of new technology for unskilled work.

Focussing here on local authorities and health services, this paper examines the significance of new technology to unskilled work in the public sector as it is developing and the implications for workplace learning. An argument is developed that new technology is central to a minority of examples of job change, although, significantly, it is more important to staff–initiated change and to workers’ ability to fully participate in life beyond the workplace.

Centres and limit cycles for an extended Kukles system

Hill, Joe M., Lloyd, Noel G., Pearson, Jane M., 'Centres and limit cycles for an extended Kukles system', Electronic Journal of Differential Equations, Vol. 2007(2007), No. 119, pp. 1-23.

Gadamer, History and the Classics: Fugard, Marowitz, Berkoff and Harrison Rewrite the Theatre

Forsyth, A. (2002). Gadamer, History and the Classics: Fugard, Marowitz, Berkoff and Harrison Rewrite the Theatre. Studies in Literary Criticism and Theory: Vol. 15. New York: Peter Lang. RAE2008

A stochastic approximation algorithm with step size adaptation

Plakhov, A.Y.; Cruz, P., (2004) 'A stochastic approximation algorithm with step size adaptation', Journal of Mathematical Science 120(1) pp.964-973 RAE2008

Christianity and civilization in the South Pacific : the influence of missionaries upon European expansion in the Pacific during the nineteenth century

http://www.archive.org/details/christianityandc00younuoft

Probing the ultimate limits of plasmonic enhancement.

Metals support surface plasmons at optical wavelengths and have the ability to localize light to subwavelength regions. The field enhancements that occur in these regions set the ultimate limitations on a wide range of nonlinear and quantum optical phenomena. We found that the dominant limiting factor is not the resistive loss of the metal, but rather the intrinsic nonlocality of its dielectric response. A semiclassical model of the electronic response of a metal places strict bounds on the ultimate field enhancement. To demonstrate the accuracy of this model, we studied optical scattering from gold nanoparticles spaced a few angstroms from a gold film. The bounds derived from the models and experiments impose limitations on all nanophotonic systems.

Pseudo-spectral solutions for fluid flow and heat transfer in electro-metallurgical applications

The pseudo-spectral solution method offers a flexible and fast alternative to the more usual finite element and volume methods, particularly when the long-time transient behaviour of a system is of interest. The exact solution is obtained at grid collocation points leading to superior accuracy on modest grids. Furthermore, the grid can be freely adapted in time and space to particular flow conditions or geometric variations, especially useful where strongly coupled, time-dependent, multi-physics solutions are investigated. Examples include metallurgical applications involving the interaction of electromagnetic fields and conducting liquids with a free surface. The electromagnetic field determines the instantaneous liquid volume shape, which then affects the electromagnetic field. A general methodology of the pseudo-spectral approach is presented, with several instructive example applications: the aluminium electrolysis MHD problem, induction melting in a cold crucible and the dynamics of AC/DC magnetically levitated droplets. Finally, comparisons with available analytical solutions and to experimental measurements are discussed.