动力论法修正高功率微波大气传输的大气介电常数

 高功率微波在大气中传输会使气体电离产生等离子体，导致大气的介电常数和折射指数发生变化。介绍了在初等理论条件下各向同性的等离子体中的大气介电常数，给出速度为麦克斯韦分布时电子与分子的碰撞对介电常数的影响，并用动力论法导出高功率微波作用下的大气介电常数及修正系数公式。     

Purification and Characterization of Cold-active α-Amylase Excreted by A Strain of Marine Cold-adaptive Penicillia

The filamentous fungi from the Huanghai sea sludge were screened according to their ability to produce cold-active α-amylase. The strain with the highest amylase activity was identified as Penicilllum species. The α-amylase purified by ammonium sulphate precipitation and column chromatography on DEAE-sepharose and sephadex G-100 shows a molecular weight of about 55000 and a pl of 4. 38. The enzyme is stable in a pH range of 5.5—8.0 and has a maximum activity at pH 6.0. Compared with the α-amylase from mesophiles and thermophiles, the cold-active enzyme shows a high enzyme activity at lower temperatures and a high sensitivity at temperatures higher than 50℃. The optimal temperature is 40℃ and the activity decreases dramatically at temperatures above 50℃. Ca^2 shows a significant effect on maintaining the structure and the activity of the enzyme. EDTA and Cu^2 are its inhibitors. The products from the hydrolysis of soluble starch with the cold-active enzyme are maltose and other oligosaccharides.     

埋藏于有机介质中金属原子团的电学、光学特性研究(II)

讨论了Ag-TCNQ与Ag-BDCB金属原子团埋藏于具有π-共轭体系的有机介质复合薄膜的电学双稳态特性，并用红外光谱研究了其机理.利用抽运-探测光束实验方法研究了这两种复合薄膜的瞬态响应，并对所得到的瞬态光谱进行了理论分析.将瞬态响应的结果与对应的电学双稳态特性定性地联系起来. 关键词：     

THE MULTIPLE IONIZATION OF ARGON INDUCED BY PARTIALLY STRIPPED CARBON IONS

The cross section ratios of the double, triple and quadruplicate ionization to the single ionization of argon by 1.5-7.5 MeV partially stripped carbon ions are measured by using time-of-flight technique. The Auger transition and the charge exchange process in the multiple ionization of argon are studied. The ratios of cross sections of the direct multiple ionization to those of the direct single ionization are obtained by subtracting the parts of the Auger transition and the charge exchange process from the measured data. It is found that the cross section ratios of the direct multiple ionization to those of the direct single ionization are in good agreement with the predicted mniti-step (ν/q_eff)^-2n+2 law.     

联络空间上同调、规范群上同调继承系与族指数定理

本文讨论了时空上deRham与联络空间的水平变更或与联络空间垂直变更构成的双上同调系列间的关系以及与族指数定理的关系。 关键词：     

Hoe1der度量下一类（0，p（D））三角插值多项式的逼近和饱和

在Hoe1der度量下一类(0，P(D))三角插值算子的逼近和饱和问题，确定了饱和类和饱和阶。     

高比表面TiO_2柱层状HLaNb_2O_7的制备和表征

采用分步离子交换法，将含钛多聚阳离子嵌入层状镧铌酸（HLaNb_2O_7）的层 间，通过焙烧，制得了TiO_2柱层状镧铌酸（TiO_2-HLaNb_2O_7）。应用XRD， FTIR，TEM和BET（Brunauer-Emmett-Teller）等技术对该材料进行了表征。结果表 明，TiO_2-HLaNb_2O_7具有较大的层间距（1.61 nm，450 ℃）和较高的比表面积 （S_(BET) = 132 m~2·g~(-1)），而且是一中孔材料，其孔径分布曲线上呈现一 狭窄的孔分布，最可几孔直径为3.3 nm。     

INTERACTION BETWEEN ISOTACTIC POLYPROPYLENE AND ITS NON-SOLVENTS

Polypropylene (PP) microporous film prepared by biaxial stretching of isotactic PPis treated with non-solvent liquid at room temperature. The dimension of the film maychange after the treatment. The degree of area contraction of PP film is dependent on thematch between PP and liquid in solubility parameter and polarity. The fact indicates thatsome interactions do exist between liquid and isotactic PP, and a shrinkable porous film isa sensitive probe to detect the weak interactions.     

2-乙酰吡嗪苯甲酰腙钴、锌和铜配合物的晶体结构及荧光性质

合成了配合物[Co(L)_2](1),[Zn(L)_2](2)和[Cu_2(L)_2Cl_2](3)(HL为2-乙酰吡嗪苯甲酰腙),并通过单晶衍射、元素分析及红外光谱表征了它们的结构。单晶衍射结果表明,配合物1和2同构,配体和金属的比例为2∶1。每个配合物中,中心金属离子与来自2个阴离子配体L-的N_2O电子供体配位,形成扭曲的八面体配位构型。在双核配合物3中,Cu(Ⅱ)离子与1个阴离子三齿酰腙配体、2个μ2桥联的氯离子配位,拥有扭曲的四方锥配位构型。此外还研究了配合物的荧光性质。     

哈密煤温和液化固体产物的理化性质及热解特性

为了合理利用哈密煤温和液化固体产物(MLS),对MLS的理化性质进行了考察,并利用热重分析技术研究了MLS及其萃取组分的热解特性和各萃取组分在热解过程中的相互作用。结果表明,相比于神华煤直接液化残渣,MLS中重质油含量较高(HS,36%),沥青烯(A,13%)、前沥青烯(PA,9%)含量较低。GC-MS结果表明,HS中烷烃含量较高(41.8%)。红外结果表明,HS中含较多烷烃侧链和取代官能团,A、PA次之,而四氢呋喃不溶物(THFIS)中基本不存在,表明其芳香性较高。MLS中的矿物质主要有液化过程生成的CaCO_3、原煤中的惰性组分SiO_2、NaCl、Al_2O_3·2SiO_2·2H_2O和残留的催化剂转化产物Fe_(1-x)S。热重结果表明,MLS起始热解温度和最大失重峰温均偏低,950℃失重率较高(54%),说明其热解活性较高。MLS各萃取组分在热解过程中存在正负两种相互作用,且与MLS中HS含量有关:当HS含量较高时,HS为MLS热解过程提供小分子自由基以促进挥发分逸出;当脱除部分HS或将HS全部脱除后,MLS各萃取组分中大分子自由基之间相互结合而抑制挥发分逸出。