S波Kπ散射以及动力学产生标量介子

考虑Kπ和Kη两个耦合道, 用手征幺正方法研究了S波Kπ散射. 结果表明, 只用一个参数, 1.2GeV以下的散射相移数据就可以得到很好的描述, 并且散射长度也和实验值符合很好. 此方法可以动力学产生标量介子κ, 并预言其质量和宽度分别大约是752MeV和594MeV. 可以定性地产生对应于K^*₀(1430)的标量介子.     

海森堡群上的Littlewood—Paley g-函数的估计

建立了Littlewood—Paley g-函数在Heisenberg群上某些Herz型空间上的有界性．     

Some Extension Conditions of Iπ Characters

In 1984, Isaacs proposed the theories of Bπ-character and Iπ-character in n-separated group. This paper gives some new extension conditions of Iπcharacters.     

Chemoselective Catalytic Hydrogenation of α,β-Unsaturated Ketones and α,β-Unsaturated Carboxylic Esters

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Mutually Pumped Phase Conjugation of Three Incoherent Beams with a Novel Photorefractive Crystal

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铜(Ⅱ)-黄原酸配合物微粒体系的光谱研究及其在废水分析中的应用

采用分光光度法和共振散射光谱法研究了Cu(Ⅱ)-黄原酸配合物微粒体系。该配合物微粒体系在410nm处有一吸收峰,其吸光度与黄原酸浓度在1.0～40×10-5mol/L范围成良好线性关系,检出限(3σ)为0.5×10-5mol/L。据此建立了一个测定废水中黄原酸含量的分光光度法.该法灵敏、简便、快速、准确、重复性好,平均回收率为98%～100%,相对标准偏差RSD为0.9%～1.9%.共振散射光谱研究结果表明,该体系存在Cu(Ⅱ)-黄原酸配合物微粒,该微粒在360nm处存在共振散射效应.     

立体定向合成粘虫性信息素

粘虫是一种多食性害虫,分布极广。它的危害对象包括麦类、水稻、玉米等十多种粮食和经济作物。1979年Takahashi等首先确定粘虫雄蛾(Mythimna Separata male)的性信息素,这是由8:1比例混合的(Z)-11-十六碳烯-1-醇乙酸酯3和(Z)-11-十六碳烯-1-醇4组     

N-烷基化手性氨基醇配体的合成

本实验制备了不同构型的两种N-单烷基和N-双烷基的新的手性氨醇配体。     

The Purification and Rapid Identification of Heavy Metal-binding Peptides of Water Hyacinth

This paper studies the rapid identification of heavy metal-binding peptides (phytochelatin) by taking Water Hyacinth as a model plant. Plants were cultured in water containing 2 μg/ml Cd2+ for 13 days. The Sephadex G-50 chromatography of root extract under low salt concentration (0. 01 mol/L PBS) gave a Cd-binding peak with MW of 10 ,000 determined by SEC HPLC. After oxidation with performic acid, its SEC HPLC molecular weight decreased to below 1300 and the reverse phase HPLC showed one peptide peak, whose amino acid composition is the same as that of the sample never undertaking oxidation, and (Glu/Gln):Cys:Gly=2:2:1. According to the general structure of phytochelatin (γ-Glu-Cys)n-Gly, n is 2 in this case. The protocol including the sequential steps of Sephadex G-50 chromatography→performic acid oxidation→reverse phase HPLC→amino acid analysis is a rapid and effective method to identify the existence of phytochelatin and determine its values of n.