微波介质陶瓷的界面特性及其对介电性能的影响

详细地总结了界面的偏析、扩散和润湿性对微波介电性能的影响机理。并评述了粉末的初始状态、烧结工艺、添加剂(掺杂)和烧结方法等因素对材料界面特性的影响，进而影响到材料介电性能的研究进展。最后指出了在微波介质陶瓷界面研究领域面临的问题及今后的发展方向。     

Shell煤气化技术

介绍气化效率高、有利于环保、具有一定竞争力的Shell煤气化工艺原理、技术特点及关键设备。建议尽快实现关键技术和设备的国产化。     

景德镇民营陶瓷企业发展特点及其探讨

分析了景德镇民营陶瓷企业发展特点及其目前存在的问题，并就加快今后景德镇民营陶瓷企业发展步伐提出了几点建议。     

Fingerprinting G-protein-coupled receptors

Recently we reported the design of a discriminating fingerprintfor rhodopsin-like G-protein-coupled receptors (GPCRs). Thefingerprint encodes the seven putative membrane-spanning motifsand was potently diagnostic of all GPCRs (52 in all) in version8.1 of the OWL composite sequence database, readily distinguishingthem from all other integral membrane proteins. With a 3-foldincrease in the size of OWL, the fingerprint has been updatedand now finds 332 receptors that match all the motifs. The situation,however, has grown in complexity: 61 sequences make imperfectmatches with the fingerprint, yielding a total of 393 ‘hits’.The bulk of the partial hits are olfactory receptors: theseappear to fall into discrete subfamilies in which one or moreof the transmembrane motifs are either poorly matched or arenot matched at all. These results are supported by preliminaryphylogenetic analyses, which show the olfactory and variousother partial matches clustering away from the main body oftrue hits. The approach has provided a powerful diagnostic toolfor identifying GPCRs, and results are consistent with previousobservations that the pheromone, cAMP and secretin-like receptorsbelong to separate families-these bear their own unique sequencefingerprints by which they may be distinguished from the rhodopsin-likesuperfamily     

Gerontechnology acceptance by elderly Hong Kong Chinese: a senior technology acceptance model (STAM)

The purpose of this study was to develop and test a senior technology acceptance model (STAM) aimed at understanding the acceptance of gerontechnology by older Hong Kong Chinese people. The proposed STAM extended previous technology acceptance models and theories by adding age-related health and ability characteristics of older people. The proposed STAM was empirically tested using a cross-sectional questionnaire survey with a sample of 1012 seniors aged 55 and over in Hong Kong. The result showed that STAM was strongly supported and could explain 68% of the variance in the use of gerontechnology. For older Hong Kong Chinese, individual attributes, which include age, gender, education, gerontechnology self-efficacy and anxiety, and health and ability characteristics, as well as facilitating conditions explicitly and directly affected technology acceptance. These were better predictors of gerontechnology usage behaviour (UB) than the conventionally used attitudinal factors (usefulness and ease of use).

Practitioner Summary: Previous studies have not given much consideration to age-related health and associated abilities when examining acceptance of technology by the ageing population. By encompassing conventional technology acceptance constructs together with age-related health and ability characteristics, the present study was able to identify more factors affecting gerontechnology acceptance by older Hong Kong Chinese.     

A study on structure and electrochemical properties of (La, Ce, Pr, Nd)2MgNi9 hydrogen storage electrode alloys

(La, Ce, Pr, Nd)₂MgNi₉ hydrogen storage alloys were prepared through induction melting followed by a long annealing treatment. The structure and electrochemical properties of annealed alloys have been investigated by orthogonal design experiments. Both the individual effects of each substituting element and their interaction in alloys were studied systemically. It has been shown that the structure of main phase in alloys belongs to PuNi₃-type with a space group R-3m. Substituting rare-earth elements have a significant effect on both the phase structure of alloys and microstructure. The anisotropic change in the crystal structure of alloys can cause the acceleration of pulverization of alloy particles and result in the deterioration of the cyclic stability of alloy electrodes. Misch metals can raise the plateau pressure of hydrogen absorption/desorption. The discharge capacity of alloy ranges from 342.97 to 380.68 mAh g⁻¹ depending on the sort and content of substituting elements. Both cerium and neodymium can obviously reduce the discharge capacity of alloy electrodes. When compared to the La₂MgNi₉ alloy electrode, mish metals can significantly improve the high rate dischargeability of alloy electrodes. The improvement of the kinetic characteristic of alloy electrodes mainly results from the increase of the hydrogen diffusion rate in alloy bulk.     

中国狂犬病毒疫苗株CTN-1-V三个代次的GP基因序列分析

目的分析三个代次CTN-1-V病毒株糖蛋白(GP)基因部分序列,并与代表性街毒株进行比较。方法利用RTPCR反应,从感染了CTN-1-V病毒的小鼠脑内获得GPcDNA的部分片段,并进行序列测定。结果三个代次的CTN-1-V病毒株GPcDNA序列的690个核苷酸与代表性狂犬病毒GP核苷酸相应序列同源性为83.2%～96.8%,氨基酸序列同源性为90.0%～97.4%。CTN1V株三代之间的核苷酸序列几乎相同。结论CTN1V株在传代过程中GP基因结构基本稳定,与中国流行的代表性街毒株的同源性高于aG株和PV株。     

炭黑－环氧树脂导电复合材料的研究

本文研究了炭黑－环氧树脂复合材料的制备工艺及炭黑填充率对材料电阻率的影响。实验结果表明，加入表面活性剂，明显改善了炭黑在环氧树脂中分布的均匀性。炭黑－环氧树脂材料具有明显的渗流效应，正温度系数效应即ＰＴＣ效应，非线性伏安特性和电磁波屏蔽效应。     

Effects of electrolyte in dye-sensitized solar cells and evaluation by impedance spectroscopy

Effects of the electrolyte of DSCs on impedance spectra were evaluated by changing concentration of redox couple, viscosity, and additives to electrolyte. The relation with current-voltage characteristics (I-V characteristics) was investigated. In many cases, the impedance component attributed to charge transfer at TiO₂|electrolyte interface demonstrated strong relation with the I-V characteristics. The recombination of electrons in TiO₂ with I₃⁻ in electrolyte was a key factor in determining performance of DSCs. To evaluate the effect of I₃⁻, diffusion-limiting current in the electrolyte for various viscosities was evaluated by cyclic voltammetry. When the short circuit current (SCC) was almost equal to the diffusion-limiting current, strong influence of the diffusion coefficient on the impedance spectra was observed: impedance arcs were enlarged as the diffusion coefficient was decreased. On the other hand, when the diffusion-limiting current was larger than the SCC, photo-excitation and electron injection processes became dominating factors in the DSCs performance. The SCC was regulated by the charge recombination process at TiO₂|electrolyte interface, and thus the impedance component ω₃ was related to the performance in such condition.     

在位分散聚合制备聚甲基丙烯酸甲酯/二氧化硅复合材料研究

采用在位分散聚合方法制备聚甲基丙烯酸甲酯 /二氧化硅微米级复合材料 ,讨论了不同表面性质的二氧化硅对材料拉伸性能、热性能、耐溶剂性能的影响 ,并用SEM、TG等手段研究了材料性能。结果表明 :由WD -70硅烷偶联剂处理过的二氧化硅微粒子填充的材料的各方面性能较好 ,由WD -10硅烷偶联剂处理过的二氧化硅填充的材料的拉伸性能次之 ,未经表面处理二氧化硅填充的材料的拉伸性能最差 ,后两者的热性能以及耐溶剂性能无明显差异