负载型双金属簇催化剂的多相一氧化碳加氢反应性能

负载型双金属簇催化剂的多相一氧化碳加氢反应性能索全伶，李晔（内蒙古工业大学化学工程系，呼和浩特０１００６２）殷元骐，金道森（中国科学院兰州化学物理研究所，兰州７３００００）关键词一氧化碳加氢，多相催化，双金属簇催化剂，钾效应。１．引言异核金属羰基簇作...     

纳秒激光闪光光解装置功能扩展──有机非线性材料二阶非线性系数测定

纳秒级激光闪光光解装置可用于有机光化学、光物理过程，瞬态发光和吸收的动力学过程的研究，在不改变原装置整体布局和结构的基础上，建立了有机非线性光学材料的二阶非线性系数测定方法，并为国家８６３专家委员会承担过仲裁测定。     

FRS-XRSA与SAXS研究硬弹性聚丙烯的结晶度、取向与超结构Ⅲ应变与回复

应用全倒易空间Ｘ 射线散射理论分析（ＦＲＳ ＸＲＳＡ）与ＳＡＸＳ研究了ＨＥＰＰ在应变（ε）与回复（Ｒ）过程中结晶、取向与超结构的变化．结果指出，ε可以诱发结晶，但当ε≥３０％后，结晶度（ＸＷＣ）趋于不变：ε可以导致晶粒破碎；ε与Ｒ对取向分布与平均取向基本上无影响，这符合片晶平行分离模型，而非叶簧弯曲模型；发现，在ε≤３０％时，层状片晶的分离为主要过程，而当ε＞３０％后，则分离的片晶会发生断层滑移；ε可以诱发微孔，类似地当ε＞２０％，微孔尺寸亦趋不变．从凝聚态结构阐明了ＨＥＰＰ在ε Ｒ过程中不同阶段的结构变化     

Synthesis,characterization, spectroscopy and thermal analysis of rare earth picrate complexes with <Emphasis Type="Italic">L</Emphasis>-lysine

Summary Rare earth picrate (RE) complexes with L-lysine (Lys) were synthesized and characterized. Elemental analysis (CHN), EDTA titrations and thermogravimetry data suggest a general formula RE(pic)₃·2Lys·2H₂O, where RE=La-Lu (without Pm) and Y, pic=picrate). IR spectra suggest that Lys is coordinated to the central ion through the nitrogen of the α-amino group. Parameters obtained from the absorption spectrum of the Nd compound indicated that the metal-ligand bonds are essentially electrostatic. Emission spectrum and biexponential behavior of the luminescence decay of the Eu compound suggest the existence of polymeric species. Thermogravimetric/derivative thermogravimetric (TG/DTG) and differential scanning calorimetry (DSC) curves of all complexes are very similar, with five events. The final products are the corresponding rare earth oxides and their X-ray diffraction patterns are identical to the calcinated oxides.</o:p>     

Simultaneous separation and identification of hashish constituents by coupled liquid chromatography-mass spectrometry (HPLC-MS)

Summary This paper reports the use of liquid chromatography for the separation and determination of the major cannabinoids extracted from hashish samples. The direct coupling to the mass spectrometer enables the selective identification both of neutral and acidic cannabinoids. The developed method does not require any preliminary derivatization and should, therefore, be of interest in forensic analysis for simple and unequivocal determination of hashish constituents.Part of this work was presented at the 2nd Italian-Spanish Joint Meeting of Medicinal Chemistry, 30 August–3 September 1995, Ferrara, Italy.     

食管贲门癌患者血清微量元素的变化

检测了３０例食管贲门癌患者手术羊后的ＳＣｕ，ＳＺｎ及Ｃｕ／Ｚｎ比值，并以２８例健康查体者作对照研究，发现：（１）食管贲门癌患者术前血清ＳＣｕ及Ｃｕ／Ｚｎ值高于对照，ＳＺｎ低于对照；（２）肿瘤患者术后１０天血清ＳＣｕ及Ｃｕ／Ｚｎ值下降，ＳＺｎ接近正常，通过本文研究提示，血清ＳＣｕ，ＳＺｎ及Ｃｕ／Ｚｎ比值与食管贲门癌患者的病情和疗效有关，可作为监测和判断病情和预后的辅助检查。     

新铜试剂—曙红Y萃取光度法测定微量铜

铜(I)-新铜试剂(NCP)-曙红Y(Eosin Y)能形成离子对三元络合物,其络合比为1:2:1。在氯仿中该络合物的λ_(max)=544nm,表观摩尔吸光系数ε=6.83×10~4 L mol~(-1)cm~(-1)。以柠檬酸盐作掩蔽剂,控制水相pH=4.5,相比(水相/氯仿)=2/1,可将络合物定量萃入氯仿中。一般常见的共存离子均不干扰测定,显色稳定性好,线性范围为0～5μg cu/5ml氯仿。方法灵救度高,选择性好。     

Monotone Chemical Reaction Networks

We analyze certain chemical reaction networks and show that every solution converges to some steady state. The reaction kinetics are assumed to be monotone but otherwise arbitrary. When diffusion effects are taken into account, the conclusions remain unchanged. The main tools used in our analysis come from the theory of monotone dynamical systems. We review some of the features of this theory and provide a self-contained proof of a particular attractivity result which is used in proving our main result.     

Highly sensitive method for the determination of a new anthracycline: Pirarubicin

Summary A new and highly sensitive HPLC method for the simultaneous determination of pirarubicine (THP-doxorubicin) and its metabolites, adriamycin and adriamycinol, in human plasma, is described. Samples were treated by liquid-liquid extraction, the organic phase removed and the residue dissolved in methanol. Separation was on a Lichrocart Supersher RP 8 column, (250×4 mm) 4 m, with a mobile phase of acetonitrile/methanol/formate-buffer.