民族地区图书馆数字化建设两极分化危害之分析

国家民委2007年度科研项目＂中国民族及民族地区图书馆调查与研究＂反映了民族地区图书馆的最新状况.文章将民族地区图书馆分为省级（自治区）图书馆、高等院校图书馆,地市级、市辖区图书馆,自治县、旗基层图书馆3个层次,以网络平台建设、自动化管理、数据库建设为指标,进行横向与纵向的立体交叉比较,分析其数字化建设现状,以具体数字阐明了民族地区图书馆数字化建设的现状：高等级图书馆与县、旗基层图书馆两极分化现象十分严重,数字鸿沟加剧 民族地区基层图书馆服务功能和生存能力的弱化,损伤了当地的文化事业,减弱了基层政权的舆论宣传力度、文化认同程度,减慢了民族共同心理的发展与升华.     

人血清白蛋白与番红花红T的相互作用研究

研究了人血清白蛋白与番红花红T的结合反应特征。荧光光谱显示番红花红T对人血清白蛋白的荧光有猝灭作用。用Stern-Volmer方程和Lineweaver-Burk双倒数函数处理实验数据。得到一定温度下的动态猝灭常数和静态猝灭结合常数、反应的热力学参数和结合位点数。根据Fǒster能量转移原理计算了番红花红T与人血清白蛋白的结合距离r=2.80nm。     

浅议反射光的偏振态

本文讨论了自然光入射到两种介质的交界面时,反射光的偏振状态。发现反射光的偏振态与入射角和两介质的相对折射率有关。     

氢化物发生-原子荧光光谱法测定豌豆中的硒

以HNO3-HClO4消解样品,用HCl将六价硒还原为四价硒,建立了氢化物发生-原子荧光光谱法测定豌豆中硒的方法。在选定的最佳实验条件下,方法的检出限为0.1ng/mL,线性范围为0—80ng/mL。应用于三种豌豆中硒的测定,回收率为90.5%—110.6%,RSD为2.0%—5.7%。     

Environmental Melodrama

Rhetorical scholarship criticizes melodrama for its tendency to simplify and reify public controversies and valorizes the comic frame as an ethically superior mode of rhetoric. These judgments are rooted in the discipline's reliance on Burkean categories, a reductionist conception of melodrama, and an implicit assumption that social unification should be the telos of rhetoric. In response, this essay advances a concept of melodrama as an integrated set of rhetorical appeals. It uses examples of environmental rhetoric to illustrate how the inventional resources of melodrama can transform public controversies and oppose dominant discourses that rationalize or obscure threats to the quality and existence of life on Earth. Based on these arguments, the essay endorses a sophistic critical perspective that foregrounds timeliness as the primary ground for rhetorical judgment and refuses to treat any rhetorical frame as inherently superior to another.     

5-氨基-1，10-菲咯啉对羟基苯甲醛西佛碱铜配合物的合成、表征及与DNA作用研究

用过渡金属铜为配位中心,以5-氨基-1,10-菲咯啉对羟基苯甲醛西佛碱铜配合物为配体,合成了一种新的、可作为核酸荧光探针的金属配合物,并对其与DNA的作用作了初步的研究。     

药物与血清白蛋白相互作用中荧光光谱学的研究进展

研究药物分子与蛋白质相互作用对阐明药物的运输和代谢以及了解蛋白质的结构与功能关系有着重要的意义。综述测定药物分子与血清白蛋白相互作用的荧光猝灭机制、结合常数、结合数、作用力类型以及药物分子对蛋白质构象的影响等基本原理和实验方法,并列举一些药物与血清白蛋白相互作用的实验结果,最后讨论其发展方向。     

氢化物发生-原子荧光光谱法测定化妆品中的硒

硒是化妆品中的限用物质。应用氢化物发生-原子荧光光谱法测定化妆品中痕量的硒,样品用硝酸和高氯酸消解,盐酸可以使硒（Ⅵ）还原成硒（Ⅳ）,硒（Ⅳ）与硼氢化钾反应产生硒化氢,硒化氢被带到原子化器,在最佳的条件下用原子荧光检测。这种方法测定化妆品中的硒,样品处理简单快速,方法的线性范围宽（0—20μg/L）,基体干扰少,检出限低（0.081μg/L）,加标回收率在96.05%—101.96%之间,相对标准偏差2.74%—2.99%。     

激电在新疆索尔库都克东铜矿勘查中的应用

激发极化法是以不同岩、矿石激电效应之差异为物质基础,通过观测和研究大地激电效应探查地下情况的一种方法。该方法在我国金属与非金属固体矿产勘查中有着广泛的应用,效果显著。本文主要讲述了以激电法为主要手段结合区域地质资料对新疆富蕴县索尔库都克东铜矿区进行勘探和解释。根据这些岩石的物性(电阻率、激发极化率)差异明显的特点,通过激电中梯方法,对1961个测点进行数据采集。其数据处理的过程主要是采用绘图软件对所测量的数据绘制相关图件,并解释分析。通过分析对比,进而推测探矿远景区。     

Understanding productivity dynamics: A task taxonomy approach

As job markets have been polarizing, firms have been changing their labor inputs. By using matched employer–employee data for Portugal, we examine whether labor market polarization has occurred within or across firms and how labor input upgrades have contributed to overall productivity growth. We develop a firm taxonomy based on worker's occupational data. Firms can be focused on one task – Abstract, Manual or Routine – on a combination of tasks, or none. Results show that Abstract firms are the most productive and their share has increased over time. Manual firms, the least productive, have had a stable share throughout the period. Routine firms have seen their share decline over time. The dynamic decomposition of the estimated productivity reveals that productivity growth is propelled by increased market shares of the most productive incumbents and exiting of the least productive, especially for Abstract firms. Notwithstanding these productivity growth drivers, they fail to avert the productivity stagnation observed in Portugal between 2004 and 2009 due to the overall decline in productivity of incumbent firms, especially Routine. We discuss the policy implications of our results which are relevant to other European economies also lagging behind in terms of knowledge and innovation capabilities.