碲

Gold deposit ; telluride minerals ; paragenetic relationship ; precipitation mechanism

金矿；碲化物；共生关系；沉淀机制

T. LOUIS, Mo., Sep 4,2008---SAFC Hitech focus area within SAFC a member of the Sigma-Aldrich Group (NASDAQ: SIAL), today announced that it has made significant progress in developing Germanium Antimony Telluride precursors for use in high volume manufacturing phase change memory applications.

AFC Hitech宣布锗-锑-碲材料(GexSbyTez或GST)的开发取得重大进展，GST前驱体用于批量生产相变存储器。

In our previous research, we found lithium ion played a crucial role on the stereoselective tuning of the cyclopropanation reaction of telluronium allylides with α,β-unsaturated esters or amides.

前述工作中，我们发现锂离子对烯丙型碲叶立德和 a ， b -不饱和酯、酰胺反应的立体化学控制起着重要的作用。

It is found that the stereochemistry of the reactions of telluronium allylide,crotonylide and trimethylsilyallylide with α,β-unsaturated esters and amides can be tuned by thechoice of reaction conditions.

利用反应条件的变化首次实现了烯丙基、巴豆基、含硅烯丙基碲叶立德与α，β-不饱和酯、酰胺进行环丙烷反应的立体化学调控，能高立体选择性地、高效率地合成两种不同几何异构体中的一个。

Some telluronium methylies can reactreadily with methyl cinnanmate to afford α,β-unsaturated ketone but not the cyelopropanederivatives.

发现了一些甲基碲叶立德很容易与肉桂酸甲酯的酯羰基发生1，2-加成反应得到α，β-不饱和酮。

Thestercoselectivity of the reaction of propargylide was different completely from that of the reactionof telluronium 3-trimethylsilylalltide with α,β-unsaturaled ketones and trans-trimethysilylacetylenyl-l-benzoyleyelopropane derivatives were obtained.

发现这一反应的立体化学与同样条件下含硅烯丙基碲叶立德和α，β-不饱和酮反应的立体化学完全不同，得到的是又式-2-三甲基硅基乙炔基-1-酮基环丙烷衍生物。

Part Ⅱ: The evelopropanation reactions of both semi-stabilized telluronium and arsoniumylides with α,β--unsaturated ketones proceed smoothly.

第二部分：烯丙基、巴豆基、三甲基硅基烯丙基、肉桂基、苄基碲、胂两种叶立德与α，β-不饱和酮均可以成功地进行环丙烷化反应，并且表现出不同的立体选择性。

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我 ，你，我们得到前夕 rybody 我得到了礼物，要去坚持在去阿拉巴马州现在是时候将你的身体巴比伦回到业务我能得到证人，每一个女孩，每米 1 休斯顿你能听到我的话，地面控制你能感觉到我需要许可的土地我不想岩石的DJ 但是你让我觉得非常好当的是要去阻止的DJ ，余弦你把我所有的夜晚歌唱班，音乐为您的米评估也没有头，没有后台通行证有适当的笑声，我会很加里波里碲当我的摇滚麦克，我摇滚的mik é你有没有爱，那么你正在与wro 吴文现在是时候将你的身体如果你不能让一个女孩，但你最好f 友可以现在是时候将你的身体我不想被低俗，婴儿只是戏弄缅因州他没有家庭计划休斯顿你能听到我的话，地面控制你能感觉到我需要许可的土地我不想岩石的DJ 但是你让我觉得非常好当的是要去阻止的DJ 余弦你把我所有的夜晚我不想岩石的DJ 但是你让我觉得非常好当的是要去阻止的DJ 余弦你把我所有的夜晚 Pimpin '是不容易他们大多数摇粒绒箱，每天晚上 Pimpin '是不容易但如果你是销售，这是正常的来吧我不想岩石的DJ 但是你让我觉得非常好当的是要去阻止的DJ 余弦你把我所有的夜晚我不想岩石的DJ 但是你让我觉得非常好当的是要去阻止的DJ 余弦你把我所有的夜晚我不想岩石的DJ 但是你让我觉得非常好当的是要去阻止的DJ 余弦你把我所有的夜晚我不想岩石的DJ 但是你让我觉得非常好当的是要去阻止的DJ 余弦你把我所有的夜晚

Four unsymmetric telluracarbocyanine dyes are prepared by the general method.

按通常的方法合成了4个不对称碲碳菁染料。

The"Brooker diviation"of the unsymmetric telluracarbocyanines is also discussed.

本文还探讨了不对称碲碳菁染料的&Brooker偏差&，结果符合一般规律。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。