Synthesis of ethyl lactate is studied by using imidazole ionic liquid as catalyst and ethyl acetate as water-stripping agent.

以酸性咪唑離子液體為催化劑人人澡人人舔，乙酸乙酯為帶水劑研究了乳酸乙酯的合成。

In addition to the lithium salts, we have also synthesized and studied the other types of ionic liquids, in which N-methyl-N-propyl piperidinium bis imide (PP13-TFSI) shows a wider electrochemical window -0.3 ~ 5.6 V vs.

在實(shí)踐中對項(xiàng)目研究作了部分調(diào)整99色色，另外也合成和研究了其它類型的離子液體哪里能看毛片，其中N-甲基-N-丙基哌啶三氟甲基磺酰亞胺（PP13-TFSI）表現(xiàn)出更寬的電化學(xué)穩(wěn)定窗口-0.3 ~ 5.6 V vs。

The resulted alkylated products could be easily recovered due to immiscibility with the ionic liquid in some case.

同有機(jī)溶劑作為反應(yīng)介質(zhì)相比五月天天色图，離子液體表現(xiàn)出獨(dú)特的溶劑效應(yīng)和更好的催化活性尤物网视频在线。

Medium to high conversion and selectivity were achieved with easy separation of the products from the ionic liquids due to their immiscibility.

反應(yīng)具有適中至高的轉(zhuǎn)化率和選擇性美女网页黄a，依據(jù)底物的不同，反應(yīng)結(jié)束后可以和離子液體系分層免费国产免费av，便于產(chǎn)物分離欧美色色精品。氯鋁酸離子液體具有一定的重復(fù)使用性

The resulted alkylated products could be easily recovered due to immiscibility with the ionic liquid, and the catalyst could be repeatedly used.

結(jié)果表明，離子液反應(yīng)體系中存在著烷基化反應(yīng)與異構(gòu)化反應(yīng)兩個(gè)不同的反應(yīng)階段久久免费精品国产72精品九九。該體系具有很好的催化性能最近中文字幕免费视频在线，而且是常溫反應(yīng)，產(chǎn)物易于分離www。射、純度高91在线亚洲视屏，催化劑可以重復(fù)使用。

The perturbative theory of laser induced collisional charge exchange is presented, in which the laser induced collisional charge exchange is described as a four body system and the compound atomic and ionic states are used as basis states of LICCE, and the equation of motion for the probability amplitudes of the states are obtained.

將激光感生碰撞電荷交換看作一個(gè)四體系統(tǒng)国产精品无码三级在线播放一区，發(fā)展了激光感生碰撞電荷交換的微擾理論欧洲一级毛片；以獨(dú)立原子和離子的復(fù)合態(tài)波函數(shù)作為激光感生碰撞體系的基組函數(shù)，得到了體系態(tài)振幅的運(yùn)動(dòng)方程免费一极a片。

These are combination of ceramic hair straighteners and ionic tourmalilne technology that make use of infra red heat.

這些都是結(jié)合陶瓷頭發(fā)直和離子tourmalilne技術(shù)曰本另类女同专区久久精品，利用紅外線熱。

It has been found that there is an empirical relationship between the interionic separations at fusion and at tensile fracture of NaCl-structure ionic crystals, viz.

發(fā)現(xiàn)拉伸斷裂時(shí)的離子間距γi與從等壓態(tài)方程計(jì)算得到的晶體熔化時(shí)的離子間距γm之間存在一個(gè)經(jīng)驗(yàn)關(guān)系式美国一级做a一级视频，即γm=0日韩毛片毛片久久精品。

Based on parameter free interionic potentials of the Gordon Kim modified electron gas formalism extended to molecular ions, the structure phase transitions in ionic molecular solids of the perovskites ABX 3 are discussed, which take the results of molecular dynamics simulations of KCaF 3 as an example.

基于無調(diào)節(jié)參數(shù)的Gordon－Kim勢和一種檢測離子運(yùn)動(dòng)的新技術(shù)，以KCaF3的分子動(dòng)力學(xué)模擬結(jié)果為例久久久久久久久久艹，對鈣鈦礦ABX3的離子分子固體的結(jié)構(gòu)相變作了探討永久免费A片在线观看全网站妓女。包括對阱勢、折疊結(jié)構(gòu)国外最大AV、能壘黄片a级a级a级、超離子態(tài)、穩(wěn)定性骨架和離子分子集團(tuán)BX6的"尺寸"和"形狀"福利影院地址。以期對離子分子固體的結(jié)構(gòu)相變有一個(gè)基本了解

With some examples, the correlat ions between the thermal expansion coefficients of minerals and the types of cr ystal structures, the nature of chemical bonds, the valencies of ions , the interionic distances, the percentage ionic characters, the electronic conf igurations of ions and the chemical compositions are discussed and summarised . The crystal chemistry approach has been used in the calculation of the th ermal expansion coefficients for minerals with simple structures and composition s.

晶體化學(xué)方法是研究礦物熱膨脹系數(shù)的有效方法爆乳网站，但由于礦物的熱膨脹系數(shù)和晶體化學(xué)參數(shù)之間的定量關(guān)系尚未完全弄清，目前僅僅能對簡單結(jié)構(gòu)礦物的熱膨脹系數(shù)進(jìn)行計(jì)算3Dh动漫很疼还往，結(jié)構(gòu)熟女操B视频、成分較復(fù)雜的礦物的熱膨脹系數(shù)計(jì)算尚缺乏好的晶體化學(xué)模型。