李贽晚而不归,欲归何处

李贽，明朝晚期著名的思想家，少年饱学，中年入仕，官至姚安知府，继而辞官归隐，不欲还家，这种有才不仕、有官不敢，有家不归之“异端”，随引后入无限之叹求，李贽晚而不归，所归于他生命的永恒追求-“真”与“直”，“真”与“直”是李贽全部思想的基础，亦是他种种行为选择的最终根源。     

Structural details of an adenine tract that does not cause DNA to bend

Runs of adenines (adenine tracts) have been implicated as the main determinant of sequence-directed DNA bending. The most widely used experimental test for bending relies on the observation that bent DNA migrates more slowly than straight DNA on a polyacrylamide electrophoresis gel. It was shown recently that the polymer (GTTTTAAAAC)n runs with normal mobility on a gel, whereas (GAAAATTTTC)n runs more slowly and thus appears to be strongly bent. The observation that these similar sequences, which differ only in the order of the adenine and thymine tracts, adopt such different shapes offers a stringent test of theories to explain DNA bending. Although the wedge model for DNA bending has recently been elaborated to explain the gel mobilities of these molecules, we wished to determine experimentally the structural basis for the difference in bending. We report here measurements of the frequency of cleavage by the hydroxyl radical at each nucleotide of cloned versions of the two polymers (see Fig. 1). We show that the TTTTAAAA sequence does not display the cleavage pattern that is associated with bent DNA, whereas the AAAATTTT sequence does. The observed sequence dependence of the cleavage pattern of an adenine tract is at odds with current models for DNA bending, which assume that adenine tracts always adopt the same conformation.     

必须重视的表现——建筑细部

文章通过对一些经典的建筑的分析和论述来强调建筑细部在建筑设计中的重要性,并试图对建筑细部设计的一些影响方面进行了试探性的讨论。以此来强调建筑细部对于审美、经典的表现。     

美国CMI钢管排管锯的利旧改造

该项目是将废旧的美国CMI钢管排管锯进行利旧改造.钢管排管锯是把上一道工序来的冷态钢管多根、同时、快速、精确锯断的主机，是一条生产线的关键设备.改造恢复好这台近千万人民币的进口设备，需要熟悉美国原机的工艺、性能.将传动系统、切削进给系统、定尺测长系统、编码器、伺服电机等各部分有机的结合.开启一条钢管成品生产线，具有显著的经济效益.     

非含幺逆半群的半格的同余对

首先通过一族非含幺逆地群Sα的同余对刻画了其半格的同余对,然后由逆半群Sα的半格的同余对刻画了各逆半群Sα的同余对.     

提高档案人员素质 做好高校档案工作之我见

从阐述如何提高全员档案意识,提升档案管理人员创新能力,加大档案管理人员培训力度,增强档案管理人员服务意识,提出提高高校档案管理水平,以更好地满足高校和社会日益增长的服务需求．     

中国石油资源安全风险分析

在分析中国石油安全的诸多影响因素基础上,采用解释结构模型(ISM)理清各要素之间的相互关系,并针对引起中国石油资源安全风险问题的诸多因素,提出了相应的解决措施。     

汽车自动变速器故障诊断方法分析研究

随着人们对汽车操纵性能要求的简单方便,自动变速器的装车使用率越来越高,对在使用中出现的各种故障,如何正确掌握其诊断和排除的方法,对自动变速器的检测与维修工作尤为重要;本文主要介绍了汽车自动变速器电控系统故障的主要检测诊断方法,并对各种方法的检测诊断原理和使用注意事项进行了综合的分析和研究。