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利用脒基硫脲和3,5-二羟基苯甲酸制备出了一种新型的加合物(C2H7N4S)+·(C7H5O4)-,用X射线单晶衍射试验方法测定其晶体结构.结果表明,晶体属单斜晶系,P21/n空间群,其中a=0.72303(1)nm,b=1.42970(3) nm,c=1.07991(2)nm,β=91.591(2)°,Z=4,R1=0.0303, wR=0.0823(I>2σ(I)).在标题化合物的晶体结构中,3,5-二羟基苯甲酸通过羧基和羟基的O-H…O氢键头尾相连形成了沿b轴无限延伸的"Z"型链,脒基硫脲通过氢键的缔合和静电相互作用连接3,5-二羟基苯甲酸的"Z"型链构成了3D超分子氢键网络结构. 相似文献
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综述了蛋白质组学的主要方法和技术——双向凝胶电泳、生物质谱技术、蛋白质芯片技术,及其在肿瘤标志物的筛选和鉴定、肿瘤治疗效果的评价及肿瘤发生机制研究等方面的应用状况,并对蛋白质组学在重离子治疗中的应用进行了展望。With the accomplishment of the human genome project, proteomics becomes a new snbject on the buildup of the whole proteins and their dynamic changes in cell emerges. Cancer is a kind of complex disease involved in multi-genes and proteins. Heavy ion therapy is all arising and potential radiation treatment nowadays. This paper reviews on the main methods and technology in proteomics-- two-dimensional gel electrophoresis (2-DE),biological mass spectrometry, protein biochips, bioinformatics and its application on identification of cancer biomarkers, evaluation of curative effect on tumour and the mechanisms of turnout formation. This paper also presents some prospects on the application of proteomics in heavv ion therapy. 相似文献
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Studies of the relationships between ionizing radiation, bone marrow transplantation and leukemo-genesis were carried out in 343 LACA mice. The recipients (female) were given whole-body irradiationwith 7 or 8 Cy of Co-60 γ-rays, while the donors (male) were given whole-body irradiation with 3, 1.5,0.5, 0.1, 0.05 and 0 Gy of Co-60 γ-rays. Each recipient was intravenously infused with 1-3 ×10~7 of themixed marrow cells of donors. In the result, the average incidence of surviving over 1 month was 86% inthe recipients. Myelocytic leukemia developed in all the transplanted groups, the average incidence being88.5%. Leukemia was observed in 1.5-2.5 months after transplantation in the recipients receiving marrowcells from donors exposed to 3 Gy, but in 5-8 months in other groups. It was demonstrated by the analysis of Y-chromosome that the leukemic cells were derived from the donor's marrow cells. The resultssuggest that marrow transplantation for the mice irradiated by Co-60 γ-rays of lethal dose can prote 相似文献
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Characteristics Analysis of Vertical Double Gate Strained Channel Heterostructure Metal-Oxide-Semiconductor-Field-Effect-Transistor
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Since device feature size shrinks continuously, there appears various short-channel effects on the fabrication and performance of devices and integrated circuits. We present a vertical double gate (VDG) strained channel heterostrueture metal-oxide-semiconduetor-field-effect-transistor (MOSFET). The electrical characteristics of the device with the effective gate length scaled down to 60nm are simulated. The results show that the drive current and transconductance are improved by 57.92% and 54.53% respectively, and grid swing is decreased by 36.83% over their unstrained counterparts. VDG MOSFETs exhibit a stronger capability to restrict short-channel-effects over traditional MOSFETs. 相似文献
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