Palladium Catalyzed Synthesis of Fluorine-containing 3-Biaryl-1-ferrocenyl-2-propene-1-one

In the last two decades, molecular-based second-order nonlinear optical (NLO) chromo-phores1, have attracted much interest because of their potential applications in emerging 2opto-electronic technologies. These efforts have mainly focused on organic systems.More recently, organometallic molecules have been investigated as well. In comparisonto common organic molecules, they offer a large variety of novel structures3, . The 4possibility of high environmental stability, and divers…     

Synthesis of a New Cobalt (II) Complex and its Interaction with DNA

The interaction of metal complexes with DNA has been widely studied by differentmethods such as spectrophotometry, light scattering technique, fluorometry1-3. Manycomplexes such as Co(phen)2 ,Co(en)2 ,Fe(EDTA)2- etc.4,5 have been synthesized and 3+ 3+their effect on DNA has been studied in order to further explain the mechanism of genemutation, anti-cancer or cancer-induced reason and DNA targeted drugs. In this paper,a new cobalt complex was synth…     

Site-specific Deposition of Colloidal Pd Nanoparticles on Self-assembled Microtubules from Biolipid

Lipid microtubules with wound ribbon features were fabricated by self-assembling method, and the deposition patterns of colloidal Pd particles on tubular template were investigated. The result indicates that colloidal Pd nanoparticles are preferentially decorated on the helical markings in the interior and on the exterior of preformed tubule and to the edge of loosely helical ribbons to obtain helical deposition features. The multi-bilayer microstructure of tubules can be marked by fine Pd nanoparticles deposited at the edge of helical ribbon. There are the site-specific interactions between lipid tubular template and colloidal Pd particles at the helical edge. A new route was illustrated that colloidal Pd particles firstly attach at the edge of thin flat membranes, and then thin membranes roll up and reassemble into tubule together with particles to form helical deposition patterns. The site-specific deposition of Pd is unbeneficial to obtain the homogeneous metal film on tubules, but it can be utilized to reveal the different chemical nature of lipid molecular assembly.     

离子交换法从发酵液中提取L-异亮氨酸

采用天然高分子絮凝剂壳聚糖对L-异亮氨酸发酵液进行预处理，在发酵液pH=2，壳聚糖用量30mg／L的条件下可取得较好的絮凝效果．并通过静态吸附实验，考察了pH和L—异亮氨酸浓度对平衡吸附量的影响．最后确定了732″离子交换树脂提取L-异亮氨酸的最佳工艺条件：上柱发酵液pH=2，上样速度0．6BV／h，洗脱液为0.5mol／L的NH4Cl．流出液经脱色、浓缩结晶后得L-异亮氨酸成品，总提取率为55％．     

Effect of Chemical Treatment on TiO2 Particles by IMPS

The photodegradation reaction rate of CHCl3 in TiO2 particulate suspension was imperoved significantly by HCl-treatment.The effect of HCl-treatment on the photocatalytic activity of TiO2 was strdied in a PEC cell by using Intensity-Modulated Photocurrent Spectroscopy(IMPS).The magntude of photocurrent response and the characteristic frequencies of the upper and lower semicircles in the complex plane of IMPS response were analyzed,and the ccathodic and anodic reaction processes of photogenerated holes and electrons were discussed.The increases in the cathodic and anodic photocurrent response and in the time constants of both cathodic and anodic reaction processes of photogenerated holes and electrons were discussed.The increases in the cathodic and anodic photocurrent response and in the time constants of both cathodic and anodic reaction processes indicate that HCl-treatment leads to the improvement of the photocatalytic activity of TiO2 and a change of the photocatalytic kinetic mechanism.     

尼龙—1010SAXS研究

用一维电子密度相关函数方法,分析了国产尼龙-1010不同拉伸比时的SAXS现象,由实验相关函数曲线可算得长周期(L),中间层厚(d_(tr)),片晶层厚(d_?),非晶层厚(A_?),平均片层厚(d),积分不变量(Q),比内表面O_s以及(η_c-η_a)等数值及其变化规律。实验结果表明尼龙-1010的结晶结构是由结晶层、非晶层以及结晶-非品中间层三部分组成。     

利用除尘灰制备活性炭的工艺研究

以除尘灰为原料，用物理活化法制备活性炭．研究了活化温度、活化时间、活化剂流量对活性炭性能的影响．实验结果表明，活化温度和活化时间对活性炭的BET比表面积和吸附性能有很大影响；该方法可制得1nm以下微孔和10nm以下中孔均比较发达的活性炭．     

Tetra-substituted Amino Aluminum Phthalocyanine as a New Red-region Fluorescent Substrate for Horseradish Peroxidase Based Enzyme-linked Immunosorbent Assay

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用傅里叶变换红外光谱差减技术自动监测大气毒物的软件及应用

本文介绍了大气毒物傅里叶变换红外光谱自动差减定量软件，介绍了方法的原理和软件的结构与功能。该技术能够进行数据库的实时咨询，差减谱位的智能搜索和光谱自动差减定量，实现了大气毒物自动定量分析。运用于实际样品分析，快速准确，优于其它的傅里叶变换红外光谱定量技术。     

~(13)C-NMR对油脂的定量测定

本工作用外加驰豫试剂及反转门控去偶方式对菜籽油和“营养”油进行了~(13)C-NMR谱的定量测定。在归属各峰基础上,认为该两油脂都以甘油酯形式存在。提出了①多烯类结合脂肪酸占烯类总量的摩尔分数P;②烯碳数与饱和碳数之比R;③包括同种油脂及不同油脂间的油脂分子各类功能团的相对含量的测定计算表达式。