Single and Binary Dye Adsorption of Methylene Blue and Methyl Orange in Alcohol Aqueous Solution via Rice Husk Based Activated Carbon: Kinetics and Equilibrium Studies

The present work was mainly focused on the single and binary adsorption of methylene blue(MB) and methyl orange(MO) from alcohol aqueous solution over rice husk based activated carbon(RHAC). The study of single dye adsorption equilibrium experiments found that the Langmuir adsorption model was consistent with the adsorption behavior of RHAC on MB and MO, indicating that it was a single layer adsorption. The adsorption behavior conformed to the pseudo-second-order kinetic model. The binary dye adsorption experiments showed that the Langmuir-Freundlich model could be applied to describe the adsorption behavior of RHAC on MB and MO. Comparation with the single dye system, the adsorption capacity on the binary dye system was larger, and there was "competitive adsorption" and "synergistic adsorption" effects existed. Meanwhile, the pseudo-second-order kinetic model also fit for the binary dye adsorption behavior.     

生物质水热催化制备重要含氧化学品研究进展

作为唯一可再生、 分布广泛的绿色含碳资源, 生物质的高值化利用尤其是制备高品质含氧化学品日益引起研究者的广泛关注, 其中生物质水热催化制备重要含氧化学品是当前的一个重要研究方向. 本文对生物质经水热催化加氢、 脱水和水解制备多元醇、 5-羟甲基糠醛和乳酸的研究进展进行了系统总结和评述, 分析了催化剂的作用机制和产物生成机理, 并对生物质水热催化的研究前景进行了展望.     

小体积液液萃取气相色谱-质谱法测定水体中邻苯二甲酸酯

采用小体积液液萃取气相色谱-质谱(GC-MS)法测定水体中邻苯二甲酸酯,有效地避免了各种空白干扰。该法以正己烷为萃取剂,对6种目标化合物的富集倍数达8～321倍。在0.40～20.0μg/L范围内线性良好,6种邻苯二甲酸酯的检出限在0.01～0.10μg/L范围内,适用于实际水体中低浓度邻苯二甲酸酯的测定。     

高效液相色谱法同时检测4种金线莲黄酮苷元及其在提取工艺评价中的应用

基于高效液相色谱(HPLC)和提取离子流色谱-质谱(EIC-MS),建立了金线莲提取成分定性定量分析及提取效率评价新方法。方法采用20RBAX Ecipse XDB-C18色谱柱,以乙腈-0.03%乙酸水溶液为流动相,采用梯度洗脱,同时分离测定金线莲提取液中芦丁、山奈酚、异鼠李素和槲皮素4种黄酮苷元的含量,经EIC-MS验证,结果可靠。以黄酮提取率为指标,评价酶解-醇提、回流-醇提、搅拌-醇提、超声-醇提、超声-微波-醇提和煎煮6种提取工艺,结果显示,最佳提取工艺为回流-醇提法,提取时间短,醇用量少,总提取率最高,可达14.96mg/g。     

几类有趣图的奇优美性和奇强协调性

对于简单图G=〈V,E〉,如果存在一个映射f:V(G)→{0,1,2,…,2|E|-1}满足:1)对任意的u,v∈V,若u≠v,则f(u)≠f(v);2)max{f(v)|v∈V}=2|E|-1;3)对任意的e_1,e_2∈E,若e_1≠e_2,则g(e_1)≠g(e_2),此处g(e)=|f(u)+f(v)|,e=uv;4)|g(e)|e∈E}={1,3,5,…,2|E|-1},则称G为奇优美图,f称为G的奇优美标号.设G=〈V,E〉是一个无向简单图.如果存在一个映射f:V(G)→{0,1,2,…,2|E|-1},满足:1)f是单射;2)■uv∈E(G),令f(uv)=f(u)+f(v),有{f(uv)|uv∈E(G)}={1,3,5,…,2|E|-1},则称G是奇强协调图,f称为G的.奇强协调标号或奇强协调值.给出了链图、升降梯等几类有趣图的奇优美标号和奇强协调标号.     

Compact, Low Threshold Nd^3＋：YVO4 Self-Raman Laser at 1178 nm

A compact low-threshold Raman laser at 1178 nm is experimentally realized by using a diode-end-pumped actively Q-switched Nd^3＋ ：YVO4 self-Raman laser. The threshold is 370mW at a pulse repetition frequency of S kHz. The maximum Raman laser output is 182 m W with the pulse duration smaller than 20 ns at a pulse repetition frequency of 30kHz with 1.8 W incident power. The optical efficiency from the incident power to the Raman laser is 10% and the slope efficiency is 13.5%.     

分数布朗运动模型中贝叶斯估计的渐近正态性

本文研究了由分数布朗运动驱动的线性随机微分方程中贝叶斯估计的渐近趋势．利用分数布朗运动的随机积分理论和Girsanov公式，得到了在平方损失函数下贝叶斯估计的渐近正态性．     

激光分子束外延和关键技术研究

较为系统地介绍了一台激光分子束外延的总体结构和关键技术研究 .同时使用该设备和技术 ,实现精确控制原子尺度外延生长 ,获得原子尺度光滑表面的氧化物外延薄膜等实验结果 .     

Baryon Ratios in Quark-Gluon Plasma

A way to calculate ratios of baryon produced from quark gluon plasma in relativistic heavyion collisionsis presented. It is assumed that at the beginning of the hadronization there are diquarks and anti-diquarks in the quarkmatter. The number of three-quark states is distributed between the corresponding multiplets, and hadronic decays aretaken into account. The results are shown at last.     

手征介质构成的面心立方光子晶体光子带结构计算

提出通过磁场分量计算手征介质组成的光子晶体光子带结构的平面波法．计算表明：手征介质“球形原子”在介电体中排列所组成的面心立方光子晶体和介电体“球形原子”在手征介质中排列所组成的面心立方光子晶体的光子带结构，均存在截止频率，在该频率以下无传播模存在．并与由电场分量计算的结果作了比较，讨论了出现差异的原因 关键词：