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Based on the results of tungsten oxide films measured by slow positron beam, a new chromism was brought forward to interpret the tungsten oxide films' chromogenic performance successfully on the electronic structure view. Meanwhile, the surface's absorption effects were verified.

根据慢正电子束流在WO〓薄膜变色过程中测量结果,从电子结构角度提出了新的变色机理,成功的解释了不同结构WO〓薄膜变色性能的优劣,同时也证实了膜表面的吸附作用。

The environmental factors influencing remediation efficiency were considered. And the feasibility of utilization of Eichhornia crassipes solms as resource was also presented.

筛选出凤眼莲并以其为主要对象,研究了水生植物净化萘水溶液的吸附、吸收、降解等过程,以及萘对水生植物生理指标所产生的影响及机理,考察了影响水生植物净化效率的环境因素,并对凤眼莲资源化利用的可行性进行了初步探讨。

In this study, different nano-hydroxyapatite particles,HAP_1(25-60nm), HAP_4(the additives is heparin, 15-50nm), HAP_5(the additives is bovine serum albumin BSA, 20-80nm) were prepared by homogeneous precipitation and used heavy-gauge hydroxyapatite as comparison,we determined amount of heparin, sialic acid ,BSA adsorbed on HAP_1,HAP_2,HAP_3 by Crystal Violet assay, Bialsche method,Bradford method respectively and analyzed the binding mechanism by infrared spectrum;After taking HAP_1,HAP_2,HAP_4,HAP_5 and RBC to co-culture in vitro,we studied RBC hemolysis test and detected RBC hematolysis rate by erythrocyte osmotic fragility test;observing the changes of morphous and locomotion of cell after coacting HAP_1,HAP_2,HAP_4,HAP_5 and RBC by light microscope and inverted phase contrast microscope;observing HAP_1,HAP_2,HAP_4,HAP_5 effecting on Ultrastructure of RBC.

本文用均匀沉淀法制备了HAP_1(25-60nm),HAP_4(添加剂肝素,15-50nm),HAP_5(添加剂牛血清白蛋白BSA,20-80nm)等纳米粒子,并用大尺寸的羟基磷灰石HAP_2(470-520nm),HAP_3(1906nm)作对照,分别利用结晶紫法、Bialsche法、Bradford法研究了肝素、唾液酸、血清白蛋白在HAP_1,HAP_2,HAP_3上的吸附量,用红外光谱分析其中的结合机理;在体外将HAP_1,HAP_2,HAP4_,HAP_5与红细胞共培养,进行了红细胞溶血试验的研究,并借助红细胞渗透脆性试验检测红细胞溶血率;运用普通光学显微镜和倒置相差显微镜观察了HAP_1,HAP_2,HAP_4,HAP_5与红细胞作用后细胞形态及运动的变化:透射电镜观察了HAP_1,HAP_2,HAP_4,HAP_5对红细胞超微结构的影响。

Quercetin, quercetin rhamnoside, hyperin, syringoside and eleutheroside E wereisolated from the flower of Acanthopanax senticosus. Searching bioactive natural compound and establishing quality evaluation standard arefocused on this experiment. Using cold immersing of 70% methanol to extract from flower ofAcanthopanax senticosus and integrating macroporous resin, silica gel column chromatography,sephadex gel to abstract. We obtained five monomer compounds (compoundⅠ-compoundⅤ),quercetin, quercetin rhamnoside, hyperin, syringoside and eleutheroside E. That five compoundswere determined by HPLC in eight parts of Acanthopanax senticosus (flower, root, leaf fruit,shoot, new shoot, phloem of shoot, skin of shoot), which provide science bases for establishingquality evaluation system and settle infarctate foundation.

本文以从刺五加花蕾中寻找具有重要生物活性的天然化合物和建立质量评价标准为主要目的,对其化学成分进行研究,采用70%甲醇冷浸的方法对刺五加花蕾中的成分进行提取,运用大孔树脂吸附色谱法、硅胶柱层析法以及葡聚糖凝胶柱层析相结合的方法进行分离,得到5种单体化合物,分别为槲皮素、槲皮素鼠李糖苷、金丝桃苷、紫丁香苷和刺五加苷E;利用高效液相色谱法对这5种化合物在刺五加花蕾中的含量进行了测定;考察了8个部位(花蕾、根、叶、果、茎干、新枝、茎韧皮部、茎皮)中这5种化合物的含量分布情况,并作一比较,为今后建立刺五加质量评价体系提供了科学依据,奠定了坚实的基础。

The stable or unstable state of the montmorillonite-water dispersion is mainly effected by the properties of montmorillonite, water, and stabilizers as well as their interactions, while the type, the structure, the properties and the concentration of the stabilizer play dominate roles. Based on the molecular designing clues, this research selected three sulfonated copolymers as the stabilizers, i.e. the sodium 2-acrylamido-2-methyl-1propane sulfonate /acrylamide /disodium itaconate terpolymer, the AMPS/AM/N-vinyl pyrrolidone terpolymer and the sodium styrenesulfonate /IA copolymer. The preparation and characterization of the sulfonated copolymers were discussed, the high-temperature stability of the montmorillonitewater dispersion was characterized with the rheology, the filtration, the particle size distribution, the electrostatic properties, and the adorption of the sulfonated copolymers onto montmorillonite particles. At the same time, a systematic mechanism of the hightemperature stabilization of the dispersion was presented.

本文构筑了分子设计的思路,选取AMPS(2-丙烯酰胺基-2-甲基丙磺酸钠)/AM/IA三元共聚物、AMPS/AM/NVP三元共聚物和SSA/IA二元共聚物等三种磺化共聚物作为蒙脱土-水分散体系的高温稳定剂,进行了磺化共聚物稳定剂的制备与表征;从流变学、滤失性能、粒度分布、电性质以及磺化共聚物在蒙脱土上的吸附作用等方面,对蒙脱土-水分散体系的高温稳定性进行了研究,考察了蒙脱土-水分散体系的高温稳定性能,同时提出了高温稳定机理。

In the paper, the multidentate carboxylic acid ligands were used to combine with Cd, resulting in the three dimensional MOCPs single crystals—C12H16CdN2O8, with a low temperature hydrothermal synthesis method. The sample was characterized with IR spectra to affirm the organic groups in the frameworks, single-crystal X-ray diffraction to determine the crystal structure and composition of the frameworks, N2 adsorption isotherms at low temperature to measure the specific surface area and pore size distribution, and with TGA/DGA analysis to scale the thermal stability. Furthermore, the dissolution property and the photocatalytic activity of MOCPs under the ultraviolet ray condition were explored.

本文用低温水热合成法,用多齿羧酸配体异烟酸和Cd配位合成出[Cd(C6H4O2N)2(H2O)4]∞三维晶体并进行了表征:采用红外光谱法确认骨架中的有机官能团;用单晶X射线衍射分析法测定MOCPs的晶体结构,并确定其骨架的组成;通过低温氮气吸附等温线测定了其比表面积和孔径分布;以热重分析和差热分析测定材料骨架的热稳定性;测定了晶体的溶解性能;最后以亚甲基蓝为目标降解物,对[Cd(C6H4O2N)2(H2O)4]∞的光催化活性及亚甲基蓝的氧化动力学进行了探索(来源:A2444BC论文网www.abclunwen.com)。

The graft polymerization of acrylonitrile on Crosslinked polyvinyl alcohol microspheres CPVA microspheres was performed by using cerium ammonium sulfate as initiator, and grafted microspheres CPVA-g-PAN were prepared. Subsequently, the grafted PAN was converted into poly via amidoximation reaction with hydroxylamine hydrochloride as reagent, resulting in the functional microspheres CPVA-g-PAO. The chemical structure and physicochemistry characters were adequately characterized with infrared spectrum, scanning electron microscope and determining Zeta potential. The effects of main factors on the amidoximation transform reaction of the grafted PAN were researched with emphasis, and the adsorption property of the functional microspheres CPVA-g-PAO for some biomolecules was examined preliminarily with uric acid as a model biomolecule.

以硫酸铈铵为引发剂,实施了丙烯腈在交联聚乙烯醇微球表面的接枝聚合,制备了接枝微球CPVA-g-PAN,然后以盐酸羟胺为试剂,通过偕胺肟化转变,将接枝的PAN转变为聚偕胺肟,制得了接枝有聚偕胺肟的功能微球CPVA-g-PAO,采用红外光谱法、扫描电子显微镜及Zeta电位测定等法,对功能微球CPVA-g-PAO的化学结构及物理化学特性进行了表征,重点考察了各主要因素对接枝PAN的偕胺肟化转变反应的影响,也以脲酸为模型分子,初探了功能微球CPVA-g-PAO对生物分子的吸附性能。

On the base of it, a novel design of MCE chip system is presented.2. Due to the inert to most chemicals, fused silica is chosen as the substrate and fabricated the chip using photolithography, wet etching and bonging technique. The inner side of micro-channel is smooth and straight.

根据微通道电泳芯片原理以及相应的应用要求设计芯片,采用微机械加工技术,选择优质石英为芯片材料制作芯片,并对制作工艺参数进行了优化,完成的芯片微通道内壁光滑,边界平整,完全满足实验要求;对微通道内壁进行修饰处理,有效地减少了内壁对样品的吸附,同时大大降低了电渗流的影响; 3。

Under the working conditions of alkaline zinc electrodes and in the range of charge and discharge potential, the composite inhibitors were proved to have good chemical and electrochemical stability themselves, and to keep their effect for a long time.

最后,通过双电层电容的测量、电化学阻抗谱、稳态极化曲线和红外光谱的分析,提出了复合代汞缓蚀剂的吸附行为理论、缓蚀作用机理和协同作用机理,很好地解释了实验的结果,并为进一步选择、设计复合代汞缓蚀剂提供了理论基础。

On the other hand, Coarse goods ofβ-carotene was purified by macroporous resin and the purification parameters wasdetermined by single factor experiment. The effect of ray, heat, preservative and usualmetal ions to stability ofβ-carotene was also researched.

另外,利用大孔吸附树脂对β—胡萝卜素的粗提液进行了纯化,通过单因素试验确定了纯化的最佳工艺参数,同时,将光、热、常见防腐剂苯甲酸钠、常见金属离子对β—胡萝卜素的稳定性的影响进行了研究。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

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