缺血性脑卒中蒙西医治疗现状

缺血性脑卒中是最常见的脑血管病,严重威胁着人类健康。不同的医学体系对其治疗亦不同,现就蒙医与西医对缺血性脑卒中治疗的现状作一综述。     

液相色谱-质谱联用技术测定无糖食品中果糖、葡萄糖、蔗糖、麦芽糖和乳糖

建立了无糖食品中葡萄糖、果糖、蔗糖、麦芽糖、乳糖的高效液相色谱-串联四极杆质谱联用测定方法.本方法以水提取样品,以Waters Carbohydrate Analysis柱(300 mm×3.9 mm, 10 μm)分离,流动相为水-乙腈(15∶ 85, V/V),电喷雾负离子MRM模式检测.方法的检出限为0.1 g/kg;线性范围为2.5～125.0 mg/L;加标回收率为86.2%～97.7%;相对标准偏差为3.1%～8.7%.     

微流控芯片光学检测技术在细胞研究中的应用与进展

重点综述了芯片上细胞培养和实时检测的微系统研究及相应检测方法和技术近年来的进展.总结了多种光学检测方法和技术体系的优缺点及发展趋势,讨论了各种方法技术对细胞研究模型的研究适用范围,探讨各种检测方法和技术对活细胞、单细胞实时无损无标记检测和传感发展前景和研究进展.最后对整个芯片实验室框架下细胞研究及传感微系统的发展方向进行了有益的思路和方法展望.     

Ammonium sulfamate flame retarded polyamide 6: Morphology and thermal degradation

<正>The effect of ammonium sulfamate(AS) content on the flame retardancy of polyamide 6(PA6) was studied.It is found that the limiting oxygen index(LOI) of PA6 increases with the increase of AS content and the flame retardancy of PA6 is significantly improved.The morphology of the residues after combustion was examined by means of scanning electron microscopy(SEM).SEM results show that AS facilitates the formation of the intumescent char layer with honeycomb-like structure,which inhibits the transfer of heat and mass,and thus improves the flame retardancy of PA6.The thermal degradation of AS flame retarded PA6 was studied by thermogravimetric analysis(TGA).The Kissinger method was applied to estimate the activation energy(E_a) of the degradation.The activation energy of the thermal degradation of PA6 decreases by adding AS,indicating that AS can promote the degradation of PA6.     

结晶聚合物的中间层

采用不同实验方法：ＳＡＸＳ、ＮＭＲ和激光Ｒａｍａｎ光谱，对甲苯和辛烷萃取和聚乙烯样品的中间层及其它结晶结构参数进行了研究。结果表明，三种方法测得的中间相厚度有所不同，但均反映出辛烷萃取的聚惭烯样品中间层厚度比甲苯萃取的大。从测试和计算结果得出，中间层厚度和其它结构参数相比不可忽略。结晶聚合物结构以“三相模型”代替传统的“两相模型”可望膛渐被人们接受。     

C60(OH)n的快速制备及其机理研究

C60(OH)n在生物、医药、高分子材料等许多方面具有应用前景[1～3],其合成对C60衍生物的水溶液化学研究与合成新的有机化合物具有重要意义.     

OXIDATIVE POLYMERIZATION BEHAVIOR OF 2,6-DIMETHYLPHENOL IN AQUEOUS MEDIA WITH POTASSIUM FERRICYANIDE

The effects of potassium ferricyanide,sodium n-dodecyl sulfate,sodium hydroxide and temperature on the molecular weight and the yield of poly(2,6-dimethyl-1,4-phenylene oxide)(PPO) synthesized in an aqueous medium were studied.It was found that oxygen in air had little influence on the oxidative polymerization of 2,6-dimethylphenol(DMP) in the aqueous medium,and potassium ferricyanide was only an oxidant during the oxidative polymerization of DMP.Sodium n-dodecyl sulfate could stabilize polymer particles...     

钴卟啉的不可逆氧化及含氟聚合物对钴卟啉复合膜氧络合寿命的影响

研究了甲基丙烯酸八氟戊酯 乙烯基咪唑共聚物 (PFIm)与 5 ,1 0 ,1 5 ,2 0 四 (邻 三甲基乙酰胺苯基 )钴卟啉 (TPPCo)复合膜的氧络合百分率随环境湿度和时间的变化 ,讨论了钴卟啉不可逆氧化的机理、动力学 ,及钴卟啉与氧络合的寿命 .空气中的水分子进攻与氧络合的钴卟啉 ,生成过氧化氢自由基和三价钴卟啉 ,是钴卟啉失去与氧络合能力的主要原因 .发现PFIm的憎水性可抑制由水分子引起的钴卟啉的不可逆氧化反应 ,可显著延长钴卟啉与氧络合的寿命 ,从而使含氟的PFIm TPPCo膜与氧络合的寿命要比甲基丙烯酸辛酯 乙烯基咪唑共聚物 (POIm)与钴卟啉复合膜的寿命长     

Synthesis and Crystal Structure of [（ArO）2Sm（OPPh3）（μ—OH）]2（ArO=2,6—tBu—4—Me—C6H2O）

1 INTRODUCTION In recent years, the syntheses, structures and reactivities of aryloxo lanthanide complexes have attracted a great deal of attention due to their various applications as homogeneous catalysts for organic reactions and precursors for organolan- thanide syntheses[1]. However, the reactivity of divalent lanthanide aryloxides has seldom been studied[2]. We have previously reported that (ArO)2- Sm(THF)4 (ArO = OC6H2-2,6-di-tert-butyl-4-Me) can efficiently initiate the poly…     

利用卟啉中位羧基基团直接缩合卟啉二聚体

卟啉单体的直接偶合法. 这种方法包括有β-β, meso-β直接连接的二聚体[8,9]和直接连接的N混杂的卟啉二聚体[10]. 我们利用二环己烷基羰化二亚胺(DCC)作催化剂, 在冰盐浴条件下, 通过两个5-(p-羧基苯基)-10,15,20-三苯基卟啉(H2CPTPP)周边上的羧酸基团一步直接缩合获得以羧酸酐连接的新型卟啉二聚体. 利用多种光谱手段证实所合成的物质为目标产物. 该方法具有反应物单一、 反应步骤简单、 副反应少、 产物纯化方便、 时间短和产率高等优点.