本文报导了<钛(Ⅳ)——5-Br-PADAP—羟胺—氯乙酸>体系混配络合物的显色反应,此体系有不同于多数金属离子同型络合物的萃取性质,利于在其他金属离子共存时测定钛。服从比尔定律的范围为0—25μg/25ml。摩尔吸光系数为7.24×104。介绍了合金钢中低含量钛的测定方法

研究了泡沫镍载钌催化剂制备过程中,RuCl3溶液浓度、pH值和浸渍时间对催化剂性能的影响,以及反应放热与体系温度之间的关系.结果表明,当0.2 g泡沫镍在浓度为0.025 mol·L-1、pH值为5～7的RuCl3溶液中浸渍25 h后,制备出的催化剂在质量分数15%NaBH4、3%NaOH溶液中的平均制氢速率可达到600 mL·min-1.用该催化剂在20 mL NaBH4碱性溶液中使用时,水解放出的热量可使反应体系温度达到80℃

研究了锑与碘化钾和罗丹明类染料在HAC-NaAc缓冲溶液(pH5.6)中的极谱行为,探讨了反应机理,提出痕量锑的测定方法。线性范围在锑浓度为0.5~2000ng/ml,检出限0.33ng/ml

利用多元晶体中原子择优占位MBW模型和原子间相互作用势,从原子层次对合金元素Fe,Ti在CaCu5结构的Y-Co合金中的择优占位进行了计算研究.计算结果表明,Fe和Ti择优占据3g位置,与实验结果符合

Being aimed to developing intermetallic base structural materials to be worked at above 1000℃, a systematic investigation has been performed of the fundamental crystallographic structure, phase constitution map, density-composition dependence, oxidation resistance and general mechanical behaviour for the ternary intermetallic alloys in the Nb-Ti-Al system. Promissing results have been obtained at the initial stage in the current program. The 1100℃ high temperature strength at the strain rate of 10-2/s and 10-5/s for the ternary compound NbTiAl3 （γ1） base alloys are generally much higher than that of the binary compound TiAl （γ）, especially in the γ1 + α2 phase region, it is as high as twice as that of TiAl. The densities are 4.1-4.79g/cm3, depending on relative amount of the intermetallics involved and the density difference between the intermetallics. The oxidation resistance at th

1 Introduction to Mechanical Engineering Design 3 2 Materials 31 3 Load and Stress Analysis 71 4 Deflection and Stiffness 147 Part 2 Failure Prevention 212 5 Failures Resulting from Static Loading 213 6 Fatigue Failure Resulting from Variable Loading 265 Part 3 Design of Mechanical Elements 358 7 Shafts and Shaft Components 359 8 Screws, Fasteners, and the Design of Nonpermanent Joints 409 9 Welding, Bonding, and the Design of Permanent Joints 475 10 Mechanical Springs 517 11 Rolling-Contact Bearings 569 12 Lubrication and Journal Bearings 617 13 Gears—General 673 14 Spur and Helical Gears 733 15 Bevel and Worm Gears 785 16 Clutches, Brakes, Couplings, and Flywheels 825 17 Flexible Mechanical Elements 879 18 Power Transmission Case Study 933 19 Finite-Element Analysis 953 20 Statistical Considerations 977

1. Drugs used for acid-peptic disorders 1) Peptic ulcer disease (PUD, 消化性溃疡) 2) Gastroesophageal reflux disease (GERD) 3) Drug-induced mucosal injury, especially by non-steroidal anti-inflammatory drugs (NSAIDs) 4) Pathologic acid-hypersecretory conditions (e.g. Zollinger-Ellison syndrome) 5) Acute stress ulcers 2. Modulators of gastrointestinal functions 1. Antiemetic drugs 2. Prokinetic drugs 3. Anti-diarrheals 4. Laxatives

1 INTRODUCTION TO DIFFERENTIAL EQUATIONS 2 FIRST-ORDER DIFFERENTIAL EQUATIONS 3 MODELING WITH FIRST-ORDER DIFFERENTIAL EQUATIONS 4 HIGHER-ORDER DIFFERENTIAL EQUATIONS 5 MODELING WITH HIGHER-ORDER DIFFERENTIAL EQUATIONS 6 SERIES SOLUTIONS OF LINEAR EQUATIONS 7 THE LAPLACE TRANSFORM 8 SYSTEMS OF LINEAR FIRST-ORDER DIFFERENTIAL EQUATIONS 9 NUMERICAL SOLUTIONS OF ORDINARY DIFFERENTIAL EQUATIONS 10 PLANE AUTONOMOUS SYSTEMS 11 ORTHOGONAL FUNCTIONS AND FOURIER SERIES 12 BOUNDARY-VALUE PROBLEMS IN RECTANGULAR COORDINATES 13 BOUNDARY-VALUE PROBLEMS IN OTHER COORDINATE SYSTEMS 14 INTEGRAL TRANSFORMS 15 NUMERICAL SOLUTIONS OF PARTIAL DIFFERENTIAL EQUATIONS

In this chapter, st ability and performance for multivariable systems with uncertainty will be considered. Consider a general multivariable system as depicted in Figure 5.1. All signals will in general be vectors, and G() and K(s) will be transfer matrices. d(s) is an output distur- bance signal and n() represents

第7章有机金属化学(二) 1827年 Zeise盐[PtCl3C2H4 1952年G. Wilkinson Fe(5-C3Hs)2结构的测定 1955年 Fischer n66-芳基化合物 1973年. Wilkinson,分离出W(CH3)6