Y(C_(16)H_(16)N_2O_2)(NO_3)_3(CH_3SOCH_3)的合成和晶体结构

合成了硝酸钇（Ⅲ）与双希夫碱Ｎ，Ｎ′－二亚水杨基乙二胺、二甲基亚砜的配合物〔Ｙ（Ｃ６Ｈ４ＯＨＣＨＮＣ２Ｈ４ＮＣＨＣ６Ｈ４ＯＨ）（ＮＯ３）３（ＣＨ３ＳＯＣＨ３）〕。ｘ—射线单晶结构分析表明该晶体属单斜晶系、空间群为Ｐ２１／ｎ，ａ＝０．９６３１（２）ｎｍ，ｂ＝１．６４１４（５）ｎｍ，ｃ＝１．６２０９（３）ｎｍ，β＝１０２．９８（２）°，Ｚ＝４，Ｄｘ＝１．６５３Ｍｇ·ｍ－３。Ｙ（Ⅲ）配位数为９，配位几何为畸变的单帽四方反棱柱，所有的配位原子均为氧原子，分别来自三个硝酸根，一个二甲基亚砜和二个双希夫碱，中心离子被双希夫碱桥联，组成一维无限长链。     

CaC2-CaF2还原脱磷的实验研究

分析了不锈钢还脱磷的热力学条件，计算了脱磷率，并在真空感应炉中用CaC2-CaF2熔剂对2Cr13重熔钢液脱磷进行了实验研究。实验结果表明，这种渣有很强的脱氧和脱硫能力。当CaF2和CaC2的质量比接近1：4时，脱磷效果最好，最大脱磷率可达75．3％，并可使最终wp降至0．01％左右。     

Investigations of 3C-SiC inclusions in 4H-SiC epilayers on 4H-SiC single crystal substrates

Synchrotron white beam x-ray topography (SWBXT) and Nomarski optical microscopy (NOM) have been used to characterize 4H-SiC epilayers and to study the character of triangular inclusions therein. 4H-SiC substrates misoriented by a range of angles from (0001), as well as (1 100) and (1120) oriented substrates were used. For epilayers grown on substrates misoriented by 3.5° from (0001) toward <1120>, the triangular inclusions were identified as consisting of two 3C-SiC structural configurations which are related to each other by a 180° rotation about the [111] axis. The epitaxial relationships between the 3C inclusions and the 4H-SiC epilayers (or substrates) were also determined. No evidence was found for the nucleation of 3C-SiC inclusions at superscrew dislocations (along the [0001] axis) in the 4H-SiC substrates. Increasing the off-axis angle of the substrates from 3.5 to 6.5° was found to greatly suppress the formation of the triangular inclusions. In the case of substrates misoriented by 8.0° from (0001) toward <1120>, the triangular inclusions were virtually eliminated. The crystalline quality of 4H-SiC epilayers grown on the substrates misoriented by 8.0° from (0001) was very good. For the (1100) and (1120) samples, there is no indication of 3C-SiC inclusions in the epilayers. Possible formation mechanisms and the morphology of 3C-SiC inclusions are discussed.     

Misoprostol-associated platelet aggregation dysfunction and increased gastrointestinal blood loss

Postoperative hypertension after radical neck dissection was detected in 20.2% of 109 neck dissections in our department between 1989 and 1993. It was probably caused by carotid sinus denervation and appeared after the vasodilation generated by anesthesia had subsided. If postoperative hypertension was encountered after the first operation, the risk of such hypertension after surgery on the contralateral side significantly increased.     

化学热处理表面改性对TiAl基合金抗高温氧化性能的影响EI

研究了渗碳处理对Ｔｉ－４８Ａｌ－２Ｃｒ－２Ｎｂ（ａｔ．％）合金高温循环氧化性的影响。试验发现，表面渗碳处理能够显著地改善ＴｉＡｌ基合金抗高温氧化能力。使用ＳＥＭ、波谱分析、能谱分析和Ｘ射线衍射分析，研究了渗碳处理提高ＴｉＡｌ基合金抗高温氧化性能的机理。     

土层锚杆技术的发展及研究动态

介绍土层锚杆技术的发展过程、分类、锚杆的工作机理和分析方法，以及对锚护体系的试验研究及其成果．在分析目前国内外研究动态的基础上，提出了有待进一步解决的问题．     

钢铁厂自动化系统的开发

自动化已经成为钢铁工业发展的关键。但是单个过程的自动化不可能完全获得最新技术的、包括多个级别和全部生产设备的综合自动化系统所可能实现的效益，通过将生产控制系统和工厂管理系统结合起来。才能使所有资源得到最佳利用。介绍了钢铁厂自动化系统的结构、设计原则，各级系统的功能上实际自动化系统的配置，以及叫体自动化系统后所取得的效果。     

9Ni钢中马氏体孪晶界面结构研究

本文和电子显微研究了９Ｎｉ钢中马氏体孪晶界面精细结构，结果表明，马氏体孪晶不是平直的孪生面（１１２），而是由一系列以享生面（１１２）为平台的小平面组成的台阶状或凹凸不平的界面。小平面大多沿「１１０」方向形成，沿「１１１」方向较少形成。     

聚苯乙烯在应力作用下的降解动力学及降解机理研究

了聚苯乙烯在振动磨中的力降解动力学和降解机理，对Ｂａｒａｍｂｏｉｍ所推导的聚合物力降解动力学方程进行了修正。修正方程可更准确地描述本乙烯在振动磨中降解时的分子量变化过程。实验结果表明，聚苯乙烯在振动磨中的降解机理依赖于聚苯乙烯所受的应力强度。当应力强度较不时的聚苯乙烯的降解机理是人规断链过程；在应力强度较大时，聚苯乙烯的降解机理则是分子链多和同时发生断裂的一个非无规断链过程。