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Four anthryl lower aliphatic amine derivatives were synthesized, and DNA binding properties of these compounds were investigated by fluorescence and absorption spectra.

蒽的低级脂肪胺衍生物水溶性很好,不宜固定于PVC膜中,但它们可与核酸分子相互作用,其荧光光谱和吸收光谱发生明显变化。对于不同脂肪胺的衍生物,其作用结果不同。

Thiourea can keep polymer solution steady well as antioxygen. And micromolecule-alcohol can associate with polymer, which maintains the network structure of polymer.

其中硫脲能起到抗氧剂的作用,在短期内能使溶液保持较好的稳定性;小分子醇类能与聚合物交联,使疏水缔合聚合物溶液的网状结构得以维持。

The combined TG-MS analysis showed that the gas products of the thermal decomposition of silver behenate were carbon dioxide,water,hydrogen,acetylene and some small molecule alkenes.

热重-差热分析-质镨联用的分析结果表明,山嵛酸银热分解的气态产物为二氧化碳,水,氢气,乙炔及一些小分子烯烃。

In this thesis, investigations focused on heteropoly acids-catalyzed C-C and C-N bond formation reactions and the synthesis of xanthenediones and acridinediones under thermal conditions are described.1.12-Phosphotungstic acid has been used as an efficient,eco-friendly,and air- and moisture-stable catalyst to promote the direct dehydrative substitution of the hydroxy group of benzylic and allylic alcohols with variousβ-dicarbonyl compounds.

本篇论文主要描述了杂多酸催化下的C-C和C-N键的生成,以及无溶剂直接加热下合成十氢氧杂蒽二酮和9-芳基十氢吖啶二酮。主要内容如下:1。在磷钨酸催化下,1,3-二羰基化合物与醇能够顺利偶合,脱除一分子的水,生成烷基化的1,3-二羰基化合物。反应在甲苯中进行时,二芳基甲醇能与各类1,3-二羰基化合物反应,成率很高;但对于1-苯乙醇,只能得到很低的产率。

Intraoperative injection of anhydrous alcohol in inoperable pancreatic cancer;2. The long term results of injection anhydrous alcohol to treat bromidrosis and its standard protocol;3. Accordingly, it becomes the best choice in the production of anhydrous alcohol .

分子筛的晶体结构不同于硅胶、活性炭等,具有高吸附性,对H2O ,NH3,H2S,CO2 等高极性分子具有很高的亲和力,在相对湿度小于30 %时,分子筛的吸水量比硅胶和氧化铝都高得多,用其生产无水酒精是最佳方案,工艺流程分为:(1)两塔蒸馏加分子筛;(2)分子筛处理后在蒸馏塔回收;(3)分子筛处理后送专用塔浓缩。

UV-Vis and continuous variation plot method were used to study the complexation of γ-cyclodextrin with bromocresol green, and the stoichiometric ratio of the complexation was to be 1∶2. Thermodynamic analysis results show an inverse relationship between temperature and complexation constant, and the change of enthalpy, entropy and free energy of the complexation were -39.988 kJ/mol, 86.400 J/ and -14.245 kJ/mol, respectively, which indicating that hydrophobic effect was the main force to form the complexes.γ-Cyclodextrin and bromocresol green complexes were examined by nuclear magnetic resonance, infrared spectrum and molecular modeling analysis, and was may be the group included in γ-cyclodextrin.

采用紫外-可见分光光度法和等摩尔连续变化法研究了γ-环糊精与溴甲酚绿的包合作用,确定了包合物形成的化学计量比为1∶2;采用热力学方法分析了温度与包合常数之间的关系,计算了包合过程的焓变、熵变及自由能变化分别为-39.988 kJ/mol, 86.400 J/和-14.245 kJ/mol,这表明疏水作用力为主要驱动力;采用核磁共振、分子模拟和红外光谱法对包合物进行了研究,确定了包合物的形成,分析认为这可能是基团进入γ-环糊精腔内导致增色效应。

Or FR4 PCB, bromide exsited mainly in pyrolysis gas and gas products mainly consisted of CO, CO2, propylene, 2-methacrylate, bromomethane, and a small amount of acetone, C1-C3 halogenation alkyls. The pyrolysis gas could be reclaimed as fules after debromide treatment. Pyrolysis liquid products consisted of 8.333% water and 91.667% oil component.

R4板中溴元素主要存在于气体产物中,气体产物主要为CO、CO2、丙烯、2-甲基丙烯、溴甲烷以及其他小分子烯烷烃产物,气体产物可通过除溴无害化处理作可燃气回收;液体产物中含有8.333%的水和油质成分。

Objective: To investigate the effect of diclofenac sodium to the changes of MMS,PGs in aqueous humor in rabbit after Nd:YAG laser posterior capsulotomy.

目的 :探讨双氯酚酸钠对兔眼Nd :YAG激光晶体后囊膜切开术后房水内中等分子物质及花生四烯酸代谢产物变化的影响。

The results can be expressed as follows:(1) With the increase of water phase content, the amine salt aggregated orderly in different forms such as W/O micro-emulsion, nodus-knot catenulate aggregates, layer liquid crystal and O/W micro-emulsion.(2) In layer liquid crystal, SO〓 mainly combined with amine salt cation by two oxygen atoms in bridge.(3) In UV-VIS spectrum of layer L. C., there is an absorption about 500 nm and "light short circuit"appeared about 430 nm. These phenomena may be very important for measuring the distance between the layers of the L.

研究发现该体系随水相含量的增加,胺盐发生不同形式的有序缔合,分别形成了W/O型微乳液、&节-结&型链状缔合体、层状液晶和O/W型微乳液:在层状液晶中,SO〓主要以桥式双齿配位形式存在,中性胺分子有利于体系中液晶的形成;层状液晶于500nm波长处有一吸收峰,在430nm附近发生&光短路&现象,该现象可能对测定层状液晶的层间距有重要意义。

These excellent properties of 9E-BHVC all mentioned above imply that it would be a true two-photon nucleic acid fluorescent probe if it can specially recognize the DNA in complex cellulous environment.So this dissertation has investigated the ability of 9E-BHVC on the cell nucleus imaging detaily.

与BMVC相比,9E-BHVC表现出作为双光子荧光探针更好的特性,例如具有更大的活性吸收截面和更高的结合常数,且具有更好的水溶性。9E-BHVC这些优良的性质预示着该分子如果能够在复杂的细胞环境中特异性地识别DNA,那么它将是真正意义的双光子核成像探针。

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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.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力