Photocatalytic degradation of methyl orange by Ca doped β-In2S3 with varying Ca concentration

Research on Chemical Intermediates - Industrial wastewater is becoming a universal environmental problem, wherein toxic organic compounds are important sources of pollution. For the degradation...     

弹性波与单侧界面裂纹相互作用问题的边界元法

借助边界元法设计了一种迭代修正方法来求解单侧界面裂纹模型与弹性波的相互作用问题,作为对算法的检验,用这种方法我们具体地分析了平面简谐弹性波对一个单侧界面裂纹的入射,给出了裂纹面的接触形态及应力场.     

On the results of Lahiri concerning uniqueness of meromorphic functions

In this paper we study the problem of meromorphic functions sharing three values with weight and obtain some theorems which improve the results given by Lahiri and others.     

The low temperature thermal properties of potassium tantalate niobate crystal

The thermal properties of KTN crystal were investigated at low temperatures by DSC and TM. The phase transition enthalpies and the average specific heats of the crystal were measured. Results are analyzed and discussed.     

禽肉中克球酚气相色谱微量快速测定法

对禽肉样品中克球酚药物残留采用微量化学法技术，以甲醇提取，氧化铝、阴离子树脂交换柱净化，乙酰化后，进行ＧＣ－ＥＣＤ毛细管色谱测定。经对肉鸡、填鸭、饲养山鸡进行添加回收率试验，方法回收率为８５．７％～９４．４％，变异系数为３．８％～７．７％，最低检出限为２．０ｎｇ／ｇ。     

二氯和邻菲罗啉二酮的镍(Ⅱ)、铜(Ⅱ)、锌(Ⅱ)配合物的合成与表征

以ＭＣｌ２和配体Ｌ（Ｌ＝１，１０－菲罗啉－５，６－二酮）为原料，合成了标题配合物ＭＬＣｌ２，Ｍ＝ＮｉⅡ，ＣｕⅡ，ＺｎⅡ，并经元素分析、热谱、ＩＲ和摩尔电导表征．三者均为四配位的电中性配合物，热稳定性高于５００Ｋ，易溶于ＤＭＦ、ＤＭＳＯ和吡啶，可溶于乙腈和水．它们在ＤＭＦ中于３５０ｎｍ和３１５ｎｍ附近显示出强的Ｍ－Ｌ荷移跃迁     

Micromechanism of sulfurizing activated carbon and its ability to adsorb mercury

The effect of ambient environment (dry or wet) and overlapping laser pulses on the laser ablation performance of brass has been investigated. For this purpose, a Q-switched, frequency doubled Nd:YAG laser with a wavelength of 532 nm, pulse energy of 150 mJ, pulse width of 6 ns and repetition rate of 10 Hz is employed. In order to explore the effect of ambient environments, brass targets have been exposed in deionized water, methanol and air. The targets are exposed for 1000, 2000, 3000 and 4000 succeeding pulses in each atmosphere. The surface morphology and chemical composition of ablated targets have been characterized by using Scanning Electron Microscope (SEM), Atomic Force Microscope (AFM) and Attenuated Total Reflection (ATR) techniques. In case of liquid environment, various features like nano- and micro-scale laser-induced periodic surface structures with periodicity 500 nm–1 μm, cavities of size few micrometers with multiple ablative layers and phenomenon of thermal stress cracking are observed. These features are originated by various chemical and thermal phenomena induced by laser heating at the liquid–solid interfaces. The convective bubble motion, explosive boiling, pressure gradients, cluster and colloid formation due to confinement effects of liquids are possible cause for such kind of features. The metal oxides and alcohol formed on irradiated surface are also playing the significant role for the formation of these kinds of structure. In case of air one huge crater is formed along with the redeposition of sputtered material and is ascribed to laser-induced evaporation and oxide formation.     

大型液相色谱分离过程FAD－SMT数学模型及其数值解

提出大型液相色谱分离过程ＦＡＤ－ＳＭＴ数学模型，把色谱分离连续性方程转变为对流扩散方程和常微分方程组，并提出模型的数值方法，分析了数值解的稳定条件和收敛条件以及空间和时间步长的选取。实验结果表明，ＦＡＤ－ＳＭＴ数学模型计算的液相色谱分离葡萄糖、果糖和分离甘露醇、山梨醇理论与实验流出曲线相吻合。灵敏度分析结果表明：相平衡常数比轴向扩散系数和总传质系数对色谱分离有较大的影响。     

锌试剂分光光度法测定壳聚糖含量

利用锌试剂与壳聚糖在一定酸度条件下的特异性显色反应，即其复合物在465nm处吸光度与壳聚糖含量在0～O．04g／L范围内呈现良好的线性关系(R=0．996)，基于此建立了一种简便快速的分光光度法。平均回收率为99．68％。