氧化锂

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METHODS 3-methoxy-7α-methylestra-1,3,5(10)-trien-17β-ol was reducted with lithium and ammonia,then the intermediate was hydrolyzed in oxalic acid and reacted with malonic acid to get 3,3-dimethoxo-7α-methylestra-5(10)-en-17-ol(compound 4),which was oxidated by pyridium bichromate ,reacted with acetylene,and hydrolyzed in oxalic acid again to get the product tibolone.

方法以3-甲氧基-7α-甲基雌甾-1，3，5(10)-三烯-17β-羟基为起始原料经锂胺还原、草酸水解、缩酮化得3，3-二甲氧基-7α-甲基雌甾-5(10)-烯-17β-羟基(化合物4)，然后用温和的氧化剂重铬酸吡啶盐氧化、炔化、再水解得目的产物。

Because of the lower coercive force and high damage threshold, the crystal is chosen and designed for six period patterns.

由于周期极化掺杂氧化镁的铌酸锂晶体具有较低矫顽场和更高损伤阈值的优点，所以选择了该晶体并在其上设计了6个周期图案。

Water, Kaolin clay, Magnesium aluminum silicate, Vegetable glycerin, Witch hazel distillate, Titanium dioxide, Hectorite, Rosehip oil, Citric acid, Rose geranium oil.

水， 高岭土，镁，铝硅酸盐，蔬菜甘油，巫婆榛馏出物，二氧化钛，硅酸镁锂，野玫瑰果籽油，柠檬酸，玫瑰老鹳草油，甲基异噻唑啉酮

The first battery company-Wanli B attery(600874) was public listed in Shanghai Stock Exchange in 1994.In recent te n years, there were about 90 public listed companies invested in battery and its related projects in China including the investment in raw material such as zinc, electrolytic manganese dioxide and investment in lead acid storage battery ,Ni-MH battery,Li-ion battery and fuel cell.

在最近10年中，深圳和上海至少已经有90家上市公司投资过电池及其相关行业，投资的领域涉及各种原材料和电池等，例如锌、电解二氧化锰等，例如铅酸蓄电池、镍氢电池、锂离子电池和燃料电池等，投资的规模达到至少达到60亿元人民币，是中国传统的电池企业无法相比的。

The reactions include, organometallic reactions (grignard reaction, organolithium -zinc, and -copper chemistry ), metal catalyzed reactions, mannich reaction, nitration, hydrogenation, azidation, amino-protection reactions, organoalluminum catalyzed beckmann rearrangement, schmidt rearrangement, epoxidation, epoxide ring opening reactions, swern oxidation etc.

这些反应包括：有机金属反应(格利亚反应，有机锂，有机锌和有机铜反应)，金属催化反应堆(suzuki 反应， negish 反应)， mannish 反应，硝化反应，氢化反应，叠氮反应，各种基团的保护和脱保护反应，有机铝催化的贝克曼重排反应，斯密特重排反应，环氧化反应，环氧烷开环反应， swern 氧化反应等。

Due to the cathode oxidizability and electrolyte instability, some primary reactions, such as electrolyte decomposition, cathode materials dissolution and self-heating redox reaction, arised at the cathode/electrolytes interface in Li-ion batteries, which deteriorated the electrochemical properties and safety of the batteries.

锂离子电池中的正极/电解液界面反应：电解液的氧化分解、正极材料腐蚀溶解及正极材料的自热氧化还原反应等，均能对电池的电化学性能和安全特性产生不良影响。

Transesterification between dimethyl sebacate and 1,2,2,6,6-pentamethyl-4-piperidinol was studied with tetraisopropyl orthotitanate ,lithium amide and di-n-octyltin oxide used separately as catalysts.

对癸二酸二甲酯与1，2，2，6，6-五甲基哌啶醇的酯交换反应进行了研究；分别考察了四异丙基钛酸酯、氨基锂、氧化二辛基锡3种催化剂的性能；采用氢核磁共振确定了产物的结构；考察了以四异丙基钛酸酯为催化剂时反应温度、反应时间、原料配比和催化剂用量对反应的影响。

Papers in the experimental part of our literature considered on the basis of the experimental exploration, and podophyllotoxin intermediates with the structural characteristics of a simple pepper aldehyde as the starting material,α,β-unsaturated carbonyl compounds are selective reduction lithium aluminum hydrogen reduction reaction as the key steps to have the Knoevenagel condensation, peracetic acid epoxy between chlorine and alkaline hydrogen peroxide epoxy, DCC condensation esterification reaction of the three podophyllotoxin intermediates.

论文实验部分我们在综合考虑文献的基础上，经过实验摸索，并结合鬼臼毒素中间体的结构特点以简单的胡椒醛为起始原料，对α，β-不饱和羰基化合物具有选择性还原的锂铝氢还原反应为关键步骤，先后经过Knoevenagel缩合，间氯过氧苯甲酸环氧化，碱性过氧化氢环氧化，DCC缩合酯化等反应合成了3个鬼臼毒素中间体。

The authors have prepared vanadium oxide films by plasma-enhanced chemical vapor depostion and pulsed laser deposition.

鉴于氧化钒是应用于锂充电电池的最有希望的电极材料之一，采用等离子体增强化学气相沉积法和激光溅射沉积法，制备了不同的氧化钒薄膜，并研究了它们的电化学性质。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。