阻抗虚部计算聚合物电解质电导率

用交流阻抗法研究了 (PEO1 ) 1 0 LiClO4 Al2 O3和 (PEO2 ) 1 6 LiClO4 碳酸乙烯酯 (EC)两种复合聚合物电解质体系的电导率 ,给出了等效电路和各拟合元件的物理意义。当阻抗谱图发生严重变形时 ,提出一种比较简单的计算聚合物电解质电导率的方法———阻抗虚部最大值法

Gas-phase ion-molecule reactions of C-60 with methyl ethers CH3OCnH2n+1

Gas-phase ion-molecule reactions of buckminsterfullerene (C-60) with the ion systems generated from the self-chemical-ionization of alkyl methyl ethers(CH3OCnH2n+1, n =2 , 3, 4) were studied in the ion source of a mass spectrometer. The adduct cation [C60C2H5O](+) and protonated molecular ion [C60H](+) were observed as the major products, The former was produced by the reactions.of C-60 with the methoxymethyl ion [CH3O = CH2](+) , the latter corresponded to the proton transfer reactions from the protonated alkyl methyl ethers to C60 It is suggested that the [3+2] cycloadduct is the most favorable structure among the probable isomers with special chemical properties, Our investigation provides the guidance for the synthesis of this compound in condensed phase.

C_(60)与甲基醚CH_3OC_nH_(2n+1)的气相离子分子反应研究

自宏观量合成和分离Ｃ６０以来，人们不断地合成各种功能化的Ｃ６０衍生物［１］．在对Ｃ６０化学性质的认识过程中，气相离子化学一直起着十分重要的作用．Ｂｏｈｍｅ等［２］在ＳＩＦＴ质谱仪上，研究了Ｃ６０的单、双、三电荷离子与水、醇、醚、醛、酮、酯和胺等的气相…

ELECTRODEPOSITION OF POLYCRYSTALLINE CD-RICH HG1-XCDXTE AND PHOTOELECTRO-CHEMICAL BEHAVIOR OF HG0.09CD0.91TE THIN-FILM

Electrodeposition process of polycrystalline Cd-rich Hg_(1-z)Cd_xTe (x>0.5) in acidic bath of CdSO_4+HTeO_2~+HgCl_2 was investigated. The simultaneous electrodeposition technique of three kinds of ions at the same potential has been achieved. The XRD, SEM and EDAX analysis of the thin film electrodeposited on titanium substrate showed a typical cubic zinc blende polycrystalline structure and homogeneous dispersion. The photoelectrochemical behavior of (1-x)=0.09 polycrystalline thin film in a polysulfide re...

X-射线荧光光谱分析中谱线重迭干扰的校正方法——线性规划法

本文叙述了用线性规划法校正稀土元素谱线重迭的方法,并对有关参数进行了讨论。本法成功地应用于EuLβ1和DyLa1、HoLβ1和LuLa1、HoLa1和GdLβ1的谱线重迭的校正。

ISOLATION AND CHARACTERIZATION OF CHLORELLA SOROKINIANA GXNN01 (CHLOROPHYTA) WITH THE PROPERTIES OF HETEROTROPHIC AND MICROAEROBIC GROWTH

Heterotrophic and anaerobic microalgae are of significance in both basic research and industrial application. A microalga strain was isolated from a wastewater treatment pond and identified as Chlorella sorokiniana Shihira et W. R. Krauss GXNN01 in terms of morphology, physiology, and phylogeny. The strain grows rapidly in heterotrophic or mixotrophic conditions with addition of various carbon sources, and even in anaerobic conditions. The maximum growth rate reached 0.28 d(-1) when using D,L-malate as the carbon source, and the protein content of the microalgae was 75.32% in cell dry weight. The strain was shown to be capable of (1) utilizing D, L-malate only with light, (2) inhibiting photosynthesis in mixotrophic growth, and (3) growing in anaerobic conditions with regular photosynthesis and producing oxygen internally. This study demonstrates the influence of oxygen (aerobic vs. anaerobic) and metabolic regime (autotrophy, mixotrophy, heterotrophy) on the physiological state of the cell.

A bioaugmentation failure caused by phage infection and weak biofilm formation ability

Two biological aerated filters (BAF) were setup for ammonia removal treatment of the circulation water in a marine aquaculture. One of the BAFs was bioaugmented with a heterotrophic nitrifying bacterium, Lutimonas sp. H10, where the ammonia removal was not improved and the massive inoculation was even followed by a nitrification breakdown from day 9 to 18. The nitrification was remained stable in control BAF operated under the same conditions. Fluorescent in situ hybridization (FISH) with rRNA-targeted probes and cultivable method revealed that Lutimonas sp. H10 almost disappeared from the bioaugomented BAF within 3 d, and this was mainly due to the infection of a specific phage as revealed by flask experiment, plaque assay and transmission electron observation. Analyses of 16S rRNA gene libraries showed that bacterial groups from two reactors evolved differently and an overgrowth of protozoa was observed in the bioaugmented BAR Therefore, phage infection and poor biofilm forming ability of the inoculated strain are the main reasons for bioaugmentation failure. In addition, gazing by protozoa of the bacteria might be the reason for the nitrification breakdown in bioaugmented BAF during day 9-18.

面向流程行业成本核算的设计与实现

该文以鞍钢冷轧厂计算机集成制造系统(LZ-CIMS)的开发为背景，阐述了在CIMS环境下，流程作业成本核算的方法，以成本控制为手段，以降低成本为目的，辅助企业会计管理准确计算产品成本，及时进行成本分析，有效地控制产品成本，从而为国内如保实现CIMS新技术提供了一种有效的途径。