The Chemical Speciation and Behavior of Mercury and Selenium in the Insoluble Fraction of Striped Dolphin Liver

Most of the mercury and selenium exist in the insoluble fraction of dolphin liver. After the insoluble fraction was digested by alkaline protease in the presence of 1% SDS, approximately 50% of Hg and Se consisted in the supernatant and the others in the residue. Gel filtration chromatography of the hydrolysate showed that 96% of Hg and 87% of Se were combined with the high molecular weight proteins stably, which cannot be substituted by the complex reagents.Mercury and selenium in the residue were confirmed as HgSe crystal.     

膨润土对亚甲基蓝的吸附性能研究

为将膨润土作为消化道粘膜保护剂提供依据，本文研究了钠质，钙质膨润土对亚甲基蓝的吸附性能。研究了在20℃下的吸附动力学，测试了肿附速率常数，绘制了20℃下各型膨润土的吸附等温线，并求得其饱和吸附量。结果表明，20℃时钠质膨润土的吸附速率要快于钙质膨润,各型膨润土的吸附行为符合Langmuir方程，钠质膨润土的饱和吸附量qm为86．51mg/g，与粘膜保护剂思密达比较接近，而钙质膨润土吸附能力相对较弱。     

关于岩石水力模型

本文对近几年来岩石水力模型、试验及工程应用情况进行了分析和讨论。      

核磁共振碳谱的研究:烷烃分子的化学位移δ与原子距边矢量μ

系统研究了核磁共振碳谱及其化学位移规律性。并提出了一种新的分子图论参数：原子距离－边数矢量（μ矢量），并发现它与烷烃的１３－ＣＮＭＲ有良好的相关性。     

Synthesis of Monodisperse Poly（glycidylmethacrylate-co-ethylene dimethacrylate） Beads and Their Application in Separation of Biopolymers

Introduction Since 19541 the polymeric separation media has attracted much attention due to their chemical stability over the entire pH range. The rigid, highly cross-linked styrene copolymers were first used for chromatography by Moore.2 The macroporous copolymers currently available are not only chemically stable but also more resistant to mechanical forces prevailing in a column and therefore are comparable to the traditional packings based on silica gel. Most polymer separation media are …     

近井地带凝析油聚集机理研究综述

凝析气藏衰竭开发过程中,当压力降到露点压力以下时,凝析油会在近井地带迅速聚集,严重损害凝析气井的生产能力.从实验和理论上综述凝析油在近井地带的聚集机理,通过研究凝析气藏衰竭开发过程中出现在近井地带的凝析油气流动的不同流型和相态特征,评价近井地带可动凝析油和不可动凝析油对气体流动性的影响.准确认识凝析油气的聚集特征和聚集机理对凝析气藏的高效开发具有重要的指导意义.      

Selective degradation of lignin and elimination of HO radicals in pulps by O_3 and UV laser flash irradiation

HO radical is an aggressive reagent to abstract hydrogen from diverse substitutes and lead them to degradation, however, in reaction of active oxygen species with lignins, complex phenolic polymers, in dispersed lignocellulose such as pulp for environment-benign delignification, HO radicals should be eliminated as more as possible to prevent cellulose from unfavorably concomitant degradation. A reaction system of O3 is constructed under UV laser flash irradiation, and HO radicals are controlled efficiently by it. A new mechanism is proposed, for the first time, that O radicals generated from reaction of O3 with UV laser flash irradiation might be the contributor to scavenge HO radicals.     

不同间距的钴纳米粒子一维链的制备及磁性能研究

在室温条件下用简单、易操作的方法磁诱导自组装制备出钴纳米粒子一维链状结构,研究了工艺条件对钴链中粒子的大小以及间距的影响.重点分析了两种不同粒径及间距的钴纳米粒子链状结构的磁性与温度的变化关系,发现钴纳米粒子链状结构在室温时呈超顺磁性,而在10K时呈弱铁磁性.提出了间距长（约10nm左右）的纳米链更趋近于单个纳米粒子的...     

La0.4Ca0.6Mn1-xCrxO3（x=0.00,0.08）的磁电性质研究

用固相反应法制备了La0.4Ca0.6Mn1-xCrxO3（x=0.00,0.08）多晶样品,通过XRD谱、M-T曲线、ρ~T曲线、Lnρ-T-14曲线,研究Cr^3＋替代Mn3＋对La0.4Ca0.6MnO3电荷有序相及电输运性质的影响.实验结果表明：Cr^3＋替代Mn3＋对La0.4Ca0.6MnO3电荷有序相影响...     

锰锌铁氧体纳米粒子制备与热磁性研究

采用化学共沉淀法制备锰锌铁氧体磁性颗粒并进行了表征,用X射线荧光光谱仪（XRF）、X射线衍射（XRD）测试分析了颗粒组成、结构、平均粒径,表明制备的样品为锰锌铁氧体纳米粒子,平均粒径约为17nm.用振动样品磁强计（VSM）测量了颗粒的磁滞回线和热磁特性.