SO42-对TiO2及Ce-TiO2光催化性能的影响

采用溶胶-凝胶法制备了纳米SO42-/Ce-TiO2, SO42-/TiO2及Ce-TiO2光催化剂,并用IR, BET, XPS, XRD等手段对所制得的样品进行表征,将其用于对有机磷农药(DDVP)稀释液的光催化降解,结果表明所制SO42-/Ce-TiO2, SO42-/TiO2具有超强酸特征,其光催化活性较Ce-TiO2有明显提高.     

脊髓小脑变性疾病病人血清铜,锌,铝,铁含量的研究

脊髓小脑变性疾病（ＳＣＤ）的病因可能与遗传、神经生化紊乱、感染、微量元素平衡障碍及自由基损伤等因素有关，其中微量元素平衡障碍的研究具有重要意义。检测了ＳＣＤ中发病率较高的橄榄桥小脑萎缩症（ＯＰＣＡ）及晚发性小脑皮质萎缩症（ＬＣＣＡ）病人１５例血清中铜、锌、铝、铁等微量元素含量。发现病人比对照组铜明显降低，Ｐ〈０．０１；锌明显降低，Ｐ〈０．０１；铝明显升高，Ｐ〈０．０１；铁无明显差别。     

锆对铂重整催化剂性能的影响规律

以正庚烷的转化为探针反应 ,研究了添加元素锆对铂重整催化剂性能的影响规律。结果表明 ,在 4 50℃和连续流动条件下 ,Pt/γ -Al2 O3催化剂中引入锆不仅能够提高铂催化剂的稳定性和芳构化产率、抑制氢解和异构化 ,而且能使铂催化剂保持初活性。锆含量在 0 .56%左右 ,其调变作用最为显著。     

MORPHOLOGY OF VULCANIZED EPDM/PP BLEND THERMOPLASTIC ELASTOMERS

Dynamic vulcanization of rubber in rubber/plastic blend thermoplastic elastomers poses challenge to the traditional concept on morphology of thermoplastic elastomers. TEM and SEM micrographs of OsO_4-stained samples and samples with EPDM dissolved by heptane or etched with CrO_3/H_2SO_4 reveal that the blends with uncrosslinked EPDM have a predominant component as the continuous phase, while the blends with crosslinked EPDM always have PP as the continuous phase even at R/P>50/50. In the latter case, crosslinked EPDM exists as the micro-domains imbedded in the PP matrix. This explains the plasticity and higher strength of the crosslinked blends.     

钕对Mg-5Al-1Si高温蠕变及组织性能的影响

研究了不同Nd含量对Mg-5Al-1Si镁合金的高温蠕变性能影响, 对析出相进行了分析, 研究了微观组织与力学性能的关系. 研究结果表明, 该合金中的主要强化相Mg2Si呈粗大的汉字状, 分布在晶界的周围, 在受到应力时, 这种汉字状相与基体的界面处易产生微裂纹, 降低合金的抗拉强度、塑性等力学性能. 在Mg-5Al-1Si合金中加入微量的Nd以后, 合金的组织得到明显的细化, 并使Mg2Si强化相形貌由粗大的汉字状转变为细小、弥散分布的颗粒状. 由于显微组织的改善, 使得Mg-5Al-1Si镁合金的室温和高温力学性能均有一定的提高, 并明显的改善了Mg-5Al-1Si的抗蠕变性能.     

油菜花粉气味成分研究

为了提高气相色谱/质谱的检出灵敏度,采用进样新方法对油菜花粉气味组分进行分离测定,对下列11种成分作了鉴定:二甲二硫;正辛烷;1,3-二甲苯,异硫氰酸丙烯酯;1,4-二甲苯;1,2-二甲苯;3,4-二甲基庚烷;二甲三硫;2-甲基-5-已烯腈;萘;对-甲氧基苯丙烯。     

A Novel Proton Sensor with Luminescence and Color Signaling Based on Platinum(II) Terpyridyl Acetylide Complex

Molecular switches that are controllable, reversible and readable at molecular level are an essential compo-nent of molecular electronics1 and chemical sensors.2-6 Of particular interest are the molecules which show dramatic and reversible changes in color and/or lumi-nescence in visible spectral region upon exposure to specific substrates. A number of chromophore- spacer-receptor systems that can selectively recognize specific guest molecules at their receptor site and pro-duce measurable col…     

Synthesis and Luminescent Properties of an Acetylide-Bridged Dinuclear Platinum(II) Terpyridyl Complex

Introduction Luminescent coordinatively unsaturated platinum(II) complexes are appealing from photochemical and pho-tophysical perspective.1,2 In particular, platinum(II) ter-pyridyl complexes have attracted considerable attention due to their rich spectroscopic2a-d and biological proper-ties.2a,e-g However, the development of the photochem-istry of these complexes is limited by their short-lived MLCT excited state in solution at room temperature. The lack of emission originates from low-l…     

胶束增敏荧光光谱法测定吡哌酸

采用不同表面活性剂对吡哌酸在胶束体系中的荧光性质进行了研究，发现在酸性介质中十二烷基硫酸钠(SDS)对吡哌酸有较强的增敏作用，据此建立了胶束增敏荧光光谱法测定吡哌酸的新方法。方法线性范围为0．07-0．36μg／mL，检出限为0.04μg／mL，平均回收率为98．6％-101．3％，相对标准偏差为1．1％-1．2％。样品测定结果令人满意。     

硅钼杂多阴离子薄膜修饰电极的研究和应用—线性扫描伏安法测定水中可溶性

本研究了以玻碳电极为基体的１：１２硅钼杂多酸根修饰电极的制备及其电化学行为，将１２－ＭＳＡ电极应用于线性扫描伏安法测定天然水中可溶性硅酸盐，结果满意，硅浓度在８．０×１０＾－７－１．７×１０＾－３ｍｏｌ／Ｌ，相对标准偏差（ｎ＝７）为１．８５％，加标回收率为９８．２％－１０３．６％，ＳｉＭｏ１２电极具有优良的选择性和稳定性。