人神经生长抑制因子的单克隆抗体制备及抗原决定簇的研究

神经生长抑制因子（ＦＩＦ）是一种特异存在于哺乳动物脑中的金鹰硫蛋白 （ＭＴ），又称ＭＴ－Ⅲ，具有特异神经细胞生长抑制效应．ＭＴ－Ⅲ与ＭＴ有７０％的序列 同源性，但ＭＴ却无此功能．在患ＡＤ症病人的大脑中，ＧＩＦ和ｍＲＮＡ的含量均显著降 低．为了进一步研究，ＭＴ－Ⅲ的结构与功能及与ＡＤ症的关系，制图示ＧＩＦ的单克隆抗 体，用ＥＬＩＳＡ方法研究了ＧＩＦ，α－结构域和β－结构域，Ｎ－末端六肽和Ｎ－末端＋肽分别 与ＧＩＦ的单克隆抗体的相互作用，并对单克隆抗体的抗原决定簇进行了分析．结果显示 了ＧＩＦ的抗原决定簇与其一定的空间构象有密切的关系．     

马克思恩格斯对未来社会设想与当今实践差距探析

马恩关于未来社会设想与当今社会主义实践出现了巨大的反差，对此，我们既要坚持马恩社会主义学说的科学性，又要随着时代条件的变化，在实践中不断丰富和发展马克思主义，经济文化比较落后的国家，在跨越“卡夫丁峡谷”之后，必须大胆吸收利用资本主义一切对我有用的先进成果，在经济文化比较落后的国家建设社会主义，首要的根本任务是发展生产力，要解决落后的生产力与先进关系之间的矛盾，必须通过不断的改革以解决生产力，促进生产力的迅速发展。     

西部民族地区社区教育经费投入现状研究 ——基于公共财政视角

《中国教育现代化2035》明确提出,教育向社区开放,政府投入、社会捐赠、学习者合理分担是社区教育经费来源的主渠道,政府投入列在首位,然而西部民族地区政府投入不足,不能很好地满足社区教育发展的需求.通过分析西部民族地区社区教育政府投入现状,提出"中央与地方财政事权和支出责任划分,建立科学稳定的经费核拨下达制度""将社区教育经费支出纳入政府部门预决算""优化教育经费内部结构""指明社区教育责任和实施主体"等发展路径,助力社区教育在西部民族地区均衡发展.     

促进城市旅游发展的商业行为

商业与旅游业具有集散客源的共同特征，处于基础与发展、物质与精神的不同层次，存在着相互依存、互促互动的关系。文章重点阐述了商业对城市旅游业兴起及发展的贡献作用，指出加快城市旅游业的发展，必须做好商业基础工作；大力发展商业一条街，创建商业会展品牌，加大商业网点建设，举办商场购物节。此外，大中城市应当有计划地形成中央商务区，构成商旅结合的集成效应。     

几株Bt菌株对紫外线的抗性探讨

采用不同照射时间的紫外光（UV）对1株野生型Bt菌株及3株Bt菌株Bt001、Bt200、Bt087进行照射处理后再置于双碟上培养16h，结果表明，Bt野生菌株在UV处理3min后已基本全部失活，而Bt001、Bt200、Bt087在UV处理8min后仍有活性。从UV处理时间的长短及平板上出现菌落数的多少得知，尽管菌株Bt001、Bt200、Bt087对UV的抗性都比野生Bt菌株强得多，但并不相等。其中，Bt200相对弱些，UV处理9min后已无菌落；Bt087最弱，UV处理8min后已无菌落；而菌株Bt001对UV的抗性最强，UV处理13min后仍有菌范出现。这说明不同的Bt菌株，其遗传背景是不同的。另外，Bt001经紫外线照射9min，培养16h后发现有9个菌落发生明显的变异，菌落呈棕黄色，菌落明显比原始菌落小。涂片，油镜下观察其菌体要比原始菌体小，此为明显发生突变的菌株。     

高师美术教育实习指导浅谈

高师美术教育实习是培养和训练美术教师的重要一环。美术课教学有其自身的学科特点 ,实习指导教师职责重大 ,对实习生的指导工作直接影响着美术教育实习的质量。因此 ,要求实习指导教师必须以身作则 ,言传身教 ;对实习生尊重信任 ,严格要求 ;在指导中突出重点 ,发挥特点。     

创新思维在“计算机图形学”教学中的实践

文章介绍了布卢姆的认知领域分类的概念及其对传统工科教学的影响。结合思维的六个层次思想以及计算机图形学课程的特点,对扫描转换算法进行了分析,将创新思维应用于教学实践。以基于公因子的直线扫描转换算法的发现为例,说明了如何通过启发式教学,引导学生从较低的知识记忆层过渡到较高的创新层。     

Silicon＇s organic pool and biological cycle in moso bamboo community of Wuyishan Biosphere Reserve

Biomineralization of Si by plants into phytolith formation and precipitation of Si into clays during weathering are two important processes of silicon’s biogeochemical cycle. As a silicon-accumulating plant, the widely distributed and woody Phyllostachys heterocycla var. pubescens (moso bamboo) contributes to storing silicon by biomineralization and, thus, prevents eutrophication of nearby waterbodies through silicon’s erosion of soil particles. A study on the organic pool and biological cycle of silicon (Si) of the moso bamboo community was conducted in Wuyishan Biosphere Reserve, China. The results showed that: (1) the standing crop of the moso bamboo community was 13355.4 g/m², of which 53.61%, 45.82% and 0.56% are represented by the aboveground and belowground parts of moso bamboos, and the understory plants, respectively; (2) the annual net primary production of the community was 2887.1 g/(m²·a), among which the aboveground part, belowground part, litterfalls, and other fractions, accounted for 55.86%, 35.30%, 4.50% and 4.34%, respectively; (3) silicon concentration in stem, branch, leaf, base of stem, root, whip of bamboos, and other plants was 0.15%, 0.79%, 3.10%, 4.40%, 7.32%, 1.52% and 1.01%, respectively; (4) the total Si accumulated in the standing crop of moso bamboo community was 448.91 g/m², with 99.83% of Si of the total community stored in moso bamboo populations; (5) within moso bamboo community, the annual uptake, retention, and return of Si were 95.75, 68.43, 27.32 g/(m²·a), respectively; (6) the turnover time of Si, which is the time an average atom of Si remains in the soil before it is recycled into the trees or shrubs, was 16.4 years; (7) the enrichment ratio of Si in the moso bamboo community, which is the ratio of the mean concentration of nutrients in the net primary production to the mean concentration of nutrients in the biomass of a community, was 0.64; and lastly, (8) moso bamboo plants stored about 1.26×10¹⁰ kg of silicon in the organic pool made up by the moso bamboo forests in the subtropical area of China. Project (No. 30370275) supported by the National Natural Science Foundation of China     

An efficient method for tracing planar implicit curves

INTRODUCTION Tracing a planar implicit curve f(x, y)=0 on a rectangular region [xl, xr]×[yb, yt] is of great interest in Computer-Aided Design and Computer Graphics. While parametric curves are easy to plot, plotting implicit curves is a challenging problem. Planar im- plicit curve plotting method can be classified into two categories (Shou et al., 2005; Martin et al., 2002; Lopes et al., 2002). In the first category are subdivi- sion methods (Shou et al., 2005; Martin et al., 2002) …