UNIX操作系统初始化过程分析

本文作者曾对UNIX分时操作系统第六版和第七版的核心代码作过分析,尔后又对该系统的几个重要的外围程序和工具性程序做了解剖。UNIX初始化程序(包括init,getty和login)规模小、结构简单;但是,对初始化过程的深入了解,有助于理解系统活动的全过程,同时也是分析其他程序(如Shell)所不可缺少的准备。     

液动冲击器测试系统的研究

分析和比较了测试破岩冲击器冲击能量的各种方法，根据冲击力法的测试原理和特点，选用冲击力法测试破岩冲击器的性能参数，并以ＹＤ系列测力传感器为检测元件，建立了一套比较完善的自动检测系统。实验证明，用这套系统测出的结果比较准确地反映了冲击器的性能特点，对于研究和改进冲击器的结构具有指导意义，同时为研究冲击破岩机理提供了可靠的实验数据。     

Turbo Pascal的并发程序单元

对用Turbo Pascal3.0实现的并发设施作了修改,修改后的子程序收入两个外部程序单元。它们可供Turbo Pascal 4.0及以上版本成功地调用。     

PbI_2纳米超微粒的制备与表征

讨论了ＰｂＩ＿２超微粒的二种化学制备方法，并用紫外－可见光谱、光电子能谱、Ｘ光小角散射等手段对其进行了表征。     

侗族"矮脚楼"演进模式新探——湖南会同高椅村建筑演变分析

侗族“矮脚楼”的产生模式一般被认为是侗族典型干栏式建筑“高脚楼”受汉文化影响变化的结果。本文中以湖南会同高椅村为例,分析其村落布局及单体建筑从南方天井式民居到侗族“矮脚楼”的演变过程,并以此作为侗族“矮脚楼”产生的另一种模式。     

有机化合物选择性氧化的研究——三氧化铬盐酸乙二胺盐酸盐的制备及对醇类的氧化

包括三氧化铬盐酸乙二胺盐酸盐的制备和它在DMF中对醇类的氧化性能,发现作为一种新的、温和的氧化剂,它仅能氧化苄醇、烯丙醇和环醇类生成相应的羰基化合物,对其它的链状饱和醇则不氧化。     

Engineering a mouse balancer chromosome.

Balancer chromosomes are genetic reagents that are used in Drosophila melanogaster for stock maintenance and mutagenesis screens. Despite their utility, balancer chromosomes are rarely used in mice because they are difficult to generate using conventional methods. Here we describe the engineering of a mouse balancer chromosome with the Cre-loxP recombination system. The chromosome features a 24-centiMorgan (cM) inversion between Trp53 (also known as p53) and Wnt3 on mouse chromosome 11 that is recessive lethal and dominantly marked with a K14-Agouti transgene. When allelic to a wild-type chromosome, the inversion suppresses crossing over in the inversion interval, accompanied by elevated recombination in the flanking regions. The inversion functions as a balancer chromosome because it can be used to maintain a lethal mutation in the inversion interval as a self-sustaining trans-heterozygous stock. This strategy can be used to generate similar genetic reagents throughout the mouse genome. Engineering of visibly marked inversions and deficiencies is an important step toward functional analyses of the mouse genome and will facilitate large-scale mutagenesis programs.     

An SSLP marker-anchored BAC framework map of the mouse genome

We have constructed a BAC framework map of the mouse genome consisting of 2,808 PCR-confirmed BAC clusters, using a previously described method. Fingerprints of BACs from selected clusters confirm the accuracy of the map. Combined with BAC fingerprint data, the framework map covers 37% of the mouse genome.     

Ag(Ⅰ)-phen-TPPS_4荧光体系的研究及痕量银的测定

研究了Ag(I)-phen-TPPS_4荧光体系,建立了痕量银的荧光测定新方法。在碱性介质中,Ag(phen)_2~ 络阳离子与TPPS_4 的阴离子形成三元离子对缔合物(Ag:Phen:TPPS_4=1:2:1),导致TPPS_4 的荧光(λex=413 nm,λem=638 nm)猝灭而定量测定银。也可直接测定缔合物的荧光(λex=438 nm,λem=648 nm)而定量测定银。两种测定方法在Ag(I)浓度为0～3 μg/25 ml范周内,工作曲线呈良好线性关系,方法的检出限前者为0.88 PPb,后者为5.2 PPb。用于废水中微量银的测定,变异系数6％,标准加入量的回收率 92～107％。     

Mutations in SEC63 cause autosomal dominant polycystic liver disease

Mutations in PRKCSH, encoding the beta-subunit of glucosidase II, an N-linked glycan-processing enzyme in the endoplasmic reticulum (ER), cause autosomal dominant polycystic liver disease. We found that mutations in SEC63, encoding a component of the protein translocation machinery in the ER, also cause this disease. These findings are suggestive of a role for cotranslational protein-processing pathways in maintaining epithelial luminal structure and implicate noncilial ER proteins in human polycystic disease.