生物工程在油脂化学工业中的应用(Ⅲ)——中链脂肪酸甘油酯在医药和化妆品中的应用

综述了中链脂肪酸甘油三酯（ＭＣＴ）的开发历史、制备、物化性质及其来源。ＭＣＴ能抑制肥胖和控制组织中的胆甾醇沉积物,还能降低血清胆甾醇。ＭＣＴ作为快能量与高能量的来源无疑是长链脂肪酸甘油酯（ＬＣＴ）的代替物,同时阐述了它在医学、营养及化妆品中的应用进展。     

核壳型多孔氧化硅制备过程中表面活性剂的浓度调控及作用机理

本文通过液晶模板法制备核壳型多孔二氧化硅,分析了多孔氧化硅在纳米颗粒表面的包覆特性.探究了表面活性剂与硅源的摩尔比(CTAB/TEOS)对多孔氧化硅壳层生长的影响,从实验上证实了多孔氧化硅壳层生长的最适摩尔浓度比随纳米颗粒尺寸的变化,并从表面活性剂与硅酸盐物种间的协同作用机制出发对此进行了阐释.利用扫描电子显微镜(SEM),透射电子显微镜(TEM),N2吸附脱附等分析方法,观察并分析了核壳多孔二氧化硅的形貌以及孔道结构.通过傅里叶变换红外光谱分析(FTIR),分析了多孔氧化硅的结构和组分.     

Endwall convective heat transfer for bluff bodies

The endwall heat transfer characteristics of forced flow past bluff bodies have been investigated using liquid crystal thermography (LCT). The bluff body is placed in a rectangular channel with both its ends attached to the endwalls. The Reynolds number varies from 50,000 to 100,000. In this study, a single bluff body and two bluff bodies arranged in tandem are considered. Due to the formation of horseshoe vortices, the heat transfer is enhanced appreciably for both cases. However, for the case of two bluff bodies in tandem, it is found that the presence of the second bluff body decreases the heat transfer as compared to the case of a single bluff body. In addition, the results show that the heat transfer exhibits Reynolds number similarity. For a single bluff body, the Nusselt number profiles collapse well when the data are scaled by Re^0.55; for two bluff bodies arranged in tandem, the heat transfer scaling is changed to Re^0.51, indicating that the power index of Reynolds number is flow dependent.     

Phase behavior of hyperbranched polymer solutions in mixed solvents

Hyperbranched polymers get more and more interesting for several applications due to their tailor-made properties influenced by the architecture and the functional groups of the polymer. The liquid–liquid phase behavior of hyperbranched polymer solutions is an important issue for various applications. Until now, the calculations of these phase equilibria are limited to solutions of hyperbranched polymers in a single solvent using Lattice Cluster theory (LCT). The LCT permits the incorporation of the architecture of the polymer directly in thermodynamic properties, as the Helmholtz energy, without any additional adjustable parameter.This papers aims at the extension of the LCT to ternary systems made from hyperbranched polymer (Boltorn H20), water and propanol. The derived expression for the Helmholtz energy allows for the first time the prediction of miscibility gaps in the ternary system based on experimental data of the binary subsystems.Additionally to the architecture of hyperbranched polymers also the functional groups of hyperbranched polymers play an important role in phase equilibrium. In order to include the association phenomena in the theoretical framework, a modified version of the Wertheim association theory is used. However, during the application of this approach the model lost its predictive power, because ternary data must be used for the parameter estimation procedure. Nevertheless, the combined theory is able to model the experimental phase behavior within the experimental accuracy.     

Quench detection system of the EURATOM coil for the Large Coil Task

A special quench detection system has been developed for the EURATOM Large Coil Task (LCT) coil. The system is based on a bridge circuit which uses a special ‘two in hand’ winding technique for the pancakes of the EURATOM LCT coil. The electronic circuit was designed in a fail safe way to prevent failure of the quench detector due to failure of one of its components. A method for quick balancing of the quench detection system in a large toroidal magnet system was applied. The quench detection system worked very reliably during the experimental phase of the LCT and was within the quench detection level setting of 50 mV, i.e. the system was not sensitive to poloidal field transients at or below this level. Non-electrical methods for quench detection were also investigated.     

Material Flow Analysis in a cooked mussel processing industry

Galicia (NW Spain) is an ideal environment for mussel culture owing to its excellent natural conditions. It is the first Spanish and European mussel producer and the second worldwide after China. More than 50% of the mussel collected in Galicia is used in the processing industry, which produces different products, as cooked mussel that is canned, frozen or used in the food industry.     

Learning the Lane Change Task: comparing different training regimes in semi-paced and continuous secondary tasks

For road safety it is paramount that distraction by in-vehicle systems is limited. To reach this aim the Lane Change Task (LCT; Mattes, 2003) was developed. It is used as a test procedure to measure distraction due to secondary tasks in driving. The LCT is implemented as an ISO standard (ISO 26022: 2010) with the aim to provide an objective criterion for designing human-machine interactions (HMI) in a way which is not detrimental to driving. As different baseline performance in the LCT could not be sufficiently explained in recent studies, comparisons of different training regimes were conducted in order to examine training influences on LCT performance. Discriminable performance improvements in LCT were found depending on the secondary task used. A training regime of at least ten runs of LCT in single-task mode is recommended for effective training. This training should be supplemented by a training of the secondary tasks examined. An additional exploration of a dual-task situation is recommended.     

可靠多播技术研究

组播是一人发送多人接收的技术,但它是不可靠的。这些年出现了许多可靠多播协议,论文先评价了两种可靠组播协议优缺点,同时引入了第三种组播协议——异步分层编码协议,并全面介绍了异步分层编码的协议框架和一些实现方法,最后给出了异步分层编码协议在DVB网络上的一个应用。     

绿色大体积智能混凝土的研发及其工程应用

应用绿色大体积智能混凝土CEIC(Green Excessive Intelligent Concrete)可控制大体积混凝土结构温差避免引起裂缝。通过智能材料元件和引入计算量的水化热减低延缓剂(智能材料)的殊途同归效果对比表明。后者是具有良好发展前景的绿色智能混凝土，并在18000m^3超大体积混凝土上结构施工中应用获得较好的效果。     

Novel decaffeination of green tea using a special picking method and shortening of the rolling process

We have recently succeeded in manufacturing low-caffeine tea (LCT) by employing a special picking method in the 3rd leaf period and shortening the leaf-rolling process. In the present study, the effect of this special method on the content of other physiologically active substances, such as catechins, theanine, and vitamin C, as well as the mechanism of reduction of caffeine content in the LCT were investigated using capillary electrophoresis. By comparing the various components of tea leaves at different picking periods with or without shortening of the rolling process, it was found that the delayed leaf picking period and shortening of the rolling process used in the manufacture of LCT selectively reduced the caffeine content while retaining catechins, theanine, and vitamin C at a sufficient level. Therefore, our study demonstrated that this modified method may be useful in the manufacture of decaffeinated green tea.