基因分类的统计方法

基因组学进行肿瘤分型中的基因筛选方法进行探讨,根据相关分析和95%参考值范围的概念确定筛选基因的方法,该方法利用了所有基因的信息,计算简便,在对白血病患者分型时取得了很好的效果.     

对《高等数学》教材建设的一点看法

在高等教育进入到大众化教育时期,建设《高等数学》教材,必须以学生为本.要编写有利于提高学生学习兴趣、启发学生思考和培养学生的能力、适合不同层次学生需要和以后实际需要的教材.     

Preparation and characterization of manganese ferrite-based magnetic liposomes for hyperthermia treatment of cancer

Comparative evaluation of two different methods of magnetic liposomes preparation, namely thin film hydration (TFH) and double emulsion (DE) with different molar ratios of egg-phosphatidyl choline (egg-PC) and cholesterol using lauric acid coated manganese ferrite-based aqueous magnetic fluid, is reported. TFH was found to be a better method of encapsulation and TFH 2:1 (egg-PC: cholesterol) magnetic liposomes showed the highest encapsulation efficiency and comparable heating ability to that of magnetic fluids. Stealth TFH 2:1 magnetic liposomes containing DSPE-PEG₂₀₀₀ were three-fold more cytocompatible as compared to the magnetic fluid. Stealth TFH 2:1 manganese ferrite-based magnetic liposomes might be useful for hyperthermia treatment of cancer.     

Energy efficient iron based electronic field cycling magnet

A new concept for an energy efficient electromagnet for fast field cycling NMR applications as well as its construction and first test results are presented. The magnet, which provides a rectangular sample space of 17 × 25 mm, has an iron yoke and pole pieces optimised with respect to the B₀ homogeneity. The maximum field is 0.66 T at a current of 320 A; its field inhomogeneity for a cylindrical sample (length 7 mm, diameter 6 mm) is about 50 ppm. The power dissipation during polarisation at 0.55 T is as low as 1.4 kW. The magnet is powered by a commercially available power supply and can be rapidly switched with a slew rate of 0.55 T/ms. The system has shown a stability of 50 ppm/h.     

物理教学中让学生感知科学探索过程,提高认知水平,培养物理思维能力

物理学是培养学生逻辑思维能力的一门科学.在物理科学研究中,为了发现科学规律,很多科学家进行了艰苦而卓有成效的探索.在课堂教学上,作为教师,应该抓住机会向学生讲授科学家们是如何探索科学问题的,包括探索过程中的思维方法、试验过程.本文以波粒二象性、法拉第电磁感应定律、太空探索等为例,具体讲解这些探索过程中的思维方法和实验过程,通过这些,让学生感知科学探索过程,提高学生的认知水平,激发学生的学习兴趣,掌握正确的思维方式和科学方法,培养创新能力.     

关于大学物理实验几个教学环节的探讨

针对现阶段大学物理实验课中存在的问题 ,提出在实验课教学中应注意的几个教学环节 ,从而达到教学目的 ,得到更好的教学效果     

Topological Research on Standard Entropies of Alkali and Alkaline Earth Metal Compounds

The ionic polarizable ability parameter is definedasgi. The connectivity index of the polarizable abiltym G is introduced fromgiand based on the adjacency matrix of molecular topological graph. Because different ions should not have the same oxidation number or the same main quantum numbers, 0G、1G amongm G have good structural selection for inorganic molecules. The 0G and 1G of 64 alkali and alkaline-earth metal oxide halide, sulfide, selenide and telluride are calculated. The result shows: the 0G and 1G all have a positive correlation with the atomic number and size of molecules, but have a negative correlation with the atomic ploarizable ability in molecules. Since the standard entropy of compound increases with the atomic number of compounds an decreases with the atomic ploarizable ability, the standard entropies of compounds have a positive correlation with the 0G and 1G of compounds. The standard entropies of 64 alkali and alkaline-earth metal oxide, halide sulfide and selenide are correlated with the0Gand1Gof these compounds.     

饱和烃热裂化夺氢氢转移能力研究

研究了在热反应条件下石油渣油中饱和烃夺氢氢转移能力的测定方法和结果。饱和烃受热生成的自由基可从氢化芳烃四氢萘夺取活泼氢,由此可测定不同饱和烃的夺氢能力。研究结果表明,饱和烃可剧烈裂化而具有较强的夺氢能力,且这种夺氢能力随反应条件苛刻度增大而增强,对于正构烷烃或石蜡系列,其夺氢能力随分子量增大而增强,而对于不同来源石油渣油的饱和分,其夺氢能力的差别不大。沥青质的存在可诱导饱和烃剧烈裂化,增大饱和烃的夺氢能力。     

加强实验教学注重能力培养

介绍了加强实验教学,注重学生的能力培养的体会和作法。     

厦门大学"化学学科拔尖学生培养试验计划"的探索与实践

全面介绍了厦门大学化学学科拔尖学生培养试验计划的探索与实施,包括:目标定位、生源遴选、导师配备、课程体系、科研训练、管理机制和实施成效等。