铜合金挤压材常见缺陷分析及预防

分析了铜合金挤压材常见缺陷(裂纹、气泡、过热、过烧、划伤、扭拧、缩尾、偏心、尺寸超差等)的产生原因,提出了相应的预防措施.生产实践表明,采取这些措施后,有效地改善了产品质量,取得了良好的经济效益.     

ICP—AES测定锌合金中杂质元素含量的研究

研究了用ICP-AES法测定锌合金中杂质元素铝、镉、铁、镁、铅、铜的方法，建立了最佳工作条件，测定了方法的检出限、测定下限。进行了干扰试验、回收率试验、基体效应等试验，本方法简便、快速、准确，结果令人满意。     

某黄金冶炼厂黄金精炼工艺的优化改进

针对某黄金精炼厂原化学-溶剂萃取金精炼过程存在反应速度慢、金的浸出效果差、萃取剂价格高、生产周期长、大气污染、安全隐患等问题,提出控电除杂、合质金粉化、水溶液氯化、粗银粉电解精炼、增加真空过滤等措施对其进行优化。优化改进后,简化了工艺流程,降低了生产成本,提高了金的回收率,缩短了生产周期,预防了氮氧化物对空气的污染,消除了安全隐患,保证了产品质量。     

Access数据库在采购管理中的应用

介绍了Access数据库的特点和优点,在采购管理中应用的意义.使用Access编写了<供应仓储管理系统>,论述了该系统的设计思想、程序结构及应用效果.该系统的应用,减轻了工作人员劳动强度、提高了工作效率、确保了物资及时供应、减少了资金的占压.     

Incoloy 825耐蚀合金

介绍了Incloy 825合金的化学成分及各元素的作用，给出了Incoloy 825合金的物理性能、机械性能、耐蚀性能，给出了Incoloy 825合金的组织，叙述了Incoloy 825合金的热处理、冷热加工、机加工、焊接工艺，列出了合金的适用技术条件、产品形状和用途。     

基于自动化技术的矿山设备现代化改造

针对河钢矿业中关铁矿建设周期长、设备供货厂家多、各类设备存在通讯障碍、检测仪表和信号缺失、先进设备无法发挥应有效能的实际情况,实施了一系列的自动化、信息化、数字化改造。建成了调度指挥中心、完善了选矿系统、压滤车间、水系统的自动控制,实现了产线设备远程操作控制,提高了工作效率,达到了“机械化换人,自动化减人”的目的。     

抓斗吊车常见故障与解决措施

分析了20 t桥式抓斗起重吊车常见故障及原因,采取了相应的解决措施,从根本上杜绝了吊车的常见故障、节约了备件、降低了生产成本、减轻了维修人员劳动强度及提高了企业的经济效益.     

铝合金板式散热器真空钎焊的影响因素分析

介绍了铝合金板式散热器的真空钎焊工艺;系统地分析了材料成分、包覆层厚度、表面预处理、封条形状、表面粗糙度、散热器装配、真空钎焊温度、保温时间、真空度、氩弧焊接、环境等因素对散热器焊接质量的影响;提出了相应的工艺措施,并在工程实践中取得了良好效果.     

天钢技术创新回顾与展望

回顾了近年来天津钢铁集团有限公司技术创新的发展和所取得的成就。重点介绍了技术创新体系建设、工艺技术创新、产品研发、产学研合作、知识产权战略、标准制修订、信息化建设等方面的技术创新现状,阐述了产品质量保障、品牌建设以及绿色发展情况,并指出了未来技术创新的发展方向。     

云南有色金属工业的历史现状与发展前景

介绍了云南有色金属工业的发展历史,从有色金属矿产资源、能源供应、人才、区位等方面比较了云南发展有色金属工业的优势。对目前在体制创新、依靠技术进步、走科学发展之路的情况进行了述评,展望了发展前景。     

Benzimidazole resistance in cyathostomes in horses in the Ukraine

The efficacy of treatment with cambendazole was tested in 1-year-old horses on a farm in Dubrovka, Ukraine. Thirty-five horses were treated. Their egg output was compared on the day of treatment and 14 days later with that of 33 untreated horses. Before treatment the mean number of eggs g-1 faeces was 614 in the controls and 766 in horses that had been treated. After 14 days the mean egg output in the controls was 580 and in the treated horses 369. This means a reduction of 54.5%. Only cyathostome larvae could be cultured from faeces collected after treatment. It can be concluded that benzimidazole resistance in cyathostomes is present in the Ukraine.     

重庆高校推进产学研合作的案例分析

以重庆大学、重庆邮电大学和重庆理工大学为例,剖析重庆高校推进产学研合作的基本模式,已经取得的突出成绩,分析总结其基本经验.从完善政策法规体系、强化经济调控、建立组织机构、加强中介建设及开展国际产学研合作等方面,提出了深入推进重庆高校产学研合作的对策建议.     

Apoptosis in experimental myocardial infarction in situ and in the perfused heart in vitro

We report the appearance of apoptotic cells in experimental myocardial infarction (rabbit heart) in in situ and in vitro preparations. Apoptosis was recognized by intravital staining with Hoechst 33342 (Ho342), by nick-end labeling (TUNEL) and by DNA laddering. A steady rise in the relative number of apoptotic cardiomyocytes (apoptotic index) was noted in in situ preparations. Apoptosis was first noted 6 h after the onset of ischemia with its highest value occurring after 72 h. Apoptotic nuclei were absent in remote areas of the left and right ventricles. Apoptotic nuclei within the infarcted area showed diminished intensity of Ho342 fluorescence. Three days after ischemia, a border zone adjacent to the infarcted area consisting of apoptotic macrophages was recognized. A novel finding was the appearance of apoptotic cardiomyocytes in the isolated perfused ischemic heart. Occurring as early as 50 min after the onset of ischemia, a high apoptotic index was present adjacent to the ligature placed around the coronary artery. This observation provides the opportunity to selectively examine factors leading to apoptosis in the ischemic heart under controlled experimental conditions.     

Fractures in childhood in Khartoum

A prospective study of fractures in 231 children received at Khartoum North Teaching Hospital(KNTH) was carried out for a period of six months. The incidence of child fracture rated as one per day, then it increased from the age of 5 years onwards in boys and between 6 and 8 years in girls. Most injuries were sustained during the day time, especially between late afternoon and sunset. 82% of injured children presented to a medical facility, while 18% were taken to native healers first. Non-road traffic accidents accounted for 84% of the fractures mainly due to sports, domestic injuries and falls; whereas road traffic accidents were 16% and occurred mainly in pedestrians. Forty three percent of the fractures needed only first aid and splintage while 42% needed closed reduction. Thirty one percent of all patients were treated as inpatients. The long bones were affected in 91% of all fractures, the commonest site being the distal end of the forearm (26%), followed by supracondylar fracture of the humerus (15.6%). In the upper limb, left-sided fractures predominated. The epiphyseal injuries were 3.5% of all fractures, mainly at the distal radial epiphysis. Boys were commonly affected between 13-15 years of age. Open fractures constituted 9.8% of the series and were mainly due to traffic accidents in town dwellers, the most vulnerable bones were those of the leg and foot. Pathological fractures accounted for 2.2% and were due to bone cysts and osteogenesis imperfecta. The problem of child safety and the preventive measures need to be more stressed.     

Botulism in Poland in 1996

A model is presented in which ion translocation through the F0 part of the ATP synthase drives the rotation of the ring of c subunits (rotor) versus the a subunit (stator). The coupling ion binding sites on the rotor are accessible from the cytoplasm of a bacterial cell except for the c subunit at the interface to the stator. Here, the binding site is accessible from the periplasm through a channel formed by subunit a. In the ATP synthesis mode, a coupling ion is anticipated to pass through the stator channel into the binding site of the adjacent rotor subunit, following the electrical potential. Occupation of this site triggers, probably by electrostatic forces, the rotation of the ring. This makes the binding site accessible to the cytoplasm, where the coupling ion dissociates. Simultaneously, this rotation moves again an empty rotor subunit into the contact site with the stator, where its binding site becomes loaded and rotation continues.     

Problems in falling in love

Certain patients enter psychoanalysis because of their inability to love another person. Often they report a repetitive erotic pursuit of desired partners, without being able to experience or maintain loving feelings. Kernberg has understood such difficulties as representing effects of early narcissistic disappointments and/or of difficulties in resolving oedipal conflicts. In this paper, Lacanian concepts of the mirror phase and symbolic love are employed to develop these issues. Sexualization of problems in mirroring may be fused with oedipal conflicts in some cases. An extended vignette is presented to illustrate the technical and theoretical issues.