- 更多网络例句与钐相关的网络例句 [注：此内容来源于网络，仅供参考]
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Chapter three focuses on the application of the Baylis-Hillman adduct in organic synthesis and some new exploration was made.
第一章对钐试剂促进的有机反应和Baylis-Hillman反应在有机合成中的应用作了简要介绍；第二章研究了二碘化钐促进的还原消除反应；第三章研究了Baylis-Hillman加成物参与的立体选择性的转化反应。
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Samarium Cobalt, Alnico mainly used in instruments and meters, electrical as well as some of the work environment has special requirements for mechanical equipment.
钐钴，铝镍钴主要用于仪器仪表，电机以及一些对工作环境有特殊要求的机械设备上。
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The company mainly produces NdFeB, ferrite, rubber and magnetic, Samarium Cobalt, Alnico and a variety of magnetic products.
公司主要生产钕铁硼，铁氧体，橡塑磁，钐钴，铝镍钴以及各类磁性制品。
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Our company long-term production and marketing of a variety of specifications and performance NdFeB, ferrite, magnetic rubber, magnetic button and Samarium Cobalt, Alnico, magnetic tile magnetic materials and other products, widely used in aerospace, electronics and electrical, plastic hardware, handicrafts, machinery and other related industries.
我公司长年生产销售各种规格以及性能的钕铁硼、铁氧体，橡胶磁、磁钮及钐钴、铝镍钴、磁瓦等各种磁性材料产品，广泛应用于航空航天领域、电子以及电机、塑胶五金、工艺品、机械等相关行业。
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The chapter two was focused on the samarium diiodide promoted organic reactions and their applications in organic synthesis, firstly, a new synthesis of highly substituted cyclopentadienes from a,β-alkynone promoted by samarium diiodide was investigated and the highly substituted cyclopentadienes were prepared in moderate to good yields under mild conditions. Secondly, the Michael addition and Michael-aldol tandem reaction of diorganyl diselenides or diorganyl disulfides with α,β-alkynones mediated by samarium diiodide were studied and a series of alkenylsulfides and alkenylselenides were prepared in good yields. Then the highly regioselecfive nucleophilic addition of the allylsamarium bromide to α,β-alkynones were explored. We found that the allylsamarium bromide reacts with α,β-alkynones to afford regiospecificly 1. 2-nucleophilic addition products in good yields under mild condition. At last we studied the coupling reaction of aryl halides promoted by NiCl〓/PPh〓/Sm〓.
第二章 研究了二碘化钐、金属钐促进的有机反应：1、二碘化钐促进下α，β-炔基酮的偶联环化反应，提供了一种制备多取代环戊二烯的新方法；2、二碘化钐促进下的二硫醚、二硒醚与α，β-炔基酮的Michael加成反应，为高产率地制备多取代的烯基硫或烯基硒化合物提供了方便可靠的新方法；3、二碘化钐促进下的二硫醚、二硒醚与α，β-炔基酮和醛、酮的Michael—aldol串联反应，提供了一种一锅法高产率地制备多取代的含硫的烯丙基醇或含硒的烯丙基醇类化合物的方便可靠的原子经济性的新方法；4、烯丙基溴化钐与α，β-炔基酮的高度区域选择性的1，2-亲核加成反应；5、NiCl〓/PPh〓/Sm〓促进的卤代芳烃的偶联反应-一种从各种卤代芳烃制备联苯类化合物的有效方法。
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For the first time we synthesized nanoscale metal hydrides of lanthanum, neodymium, samarium, dysprosium, and ytterbium with high efficiency under mild condition by complexometric catalysis instead of traditional preparation at high temperature and high pressure. It is for the first time that we synthesized lanthanide organic compounds with catalysts or initiating agents at atmosphere and ambient temperature,and some of them are new compounds. Nanometric lanthanide metal powders are prepared by thermal decomposition of the compounds in vacuum. Differently from the traditional method, size of the products prepared by our method is less than 40nm, and the activity of the reaction is very high. They are pyrophoric at atmosphere. They can make some reactions without activity or low activity show extremely high activity .We investigated influent regulations of methods, conditions to scale and special surface.
我们首次成功地用络合催化等方法取代需在高温高压下进行的传统方法，在温和条件下高效率地合成出纳米尺寸镧、钕、钐、镝、镱的金属氢化物；首次在常压常温的条件下，通过催化、引发等方法合成镧系金属有机化合物，再将其真空热分解成功地制备了纳米尺寸的镧、钕、钐、镝、镱等金属粉末；与传统方法不同，这些方法得到的产品基本颗粒尺寸小于 40 nm，遇到空气燃烧，具有极高的化学反应活性，使原来活性很低甚至观察不到活性的反应大幅度提高反应速率和产率；考察了制备方法、制备条件等因素对晶粒尺寸、比表面积大小等的影响规律。
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Tache of kinetics for the procedure of reduction reaction of samarium oxide with metallic lanthanum has been discussed in this paper.
讨论了镧热还原氧化钐过程的动力学环节，分析了还原过程镧—钐合金存在的可能性，采用反证法确定了制备金属钐温度下的动力学控速环节。
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Methods Samarium nitrate was administrated to mice at different doses (0,5,50,500,2000mg/L) for 90d.The contents of samarium and trace elements in testicle were observed.
110只雄性ICR分为5组，小鼠分别自由饮用0，5，50，500和2 000mg/L的硝酸钐水溶液90d，测定睾丸内钐和微量元素含量的变化。
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When diaryl ketones were treated in DMF promoted by samarium metal with TMSCl as activator, diaryl ketones react with DMF followed by a carbene rearrangement to afford benzoins unexpectedly, with benzils were obtained as byproducts, the formation of which may be explained as a result arising from the auto-oxidation of benzoins. Further investigation found the reaction could also proceed smoothly when I〓 was used as an activator. The reaction could occur as well in SmI〓/THF, though benzoins were obtained in relatively low yields.
发现当有活化剂TMSCl存在时，金属钐能有效的促进二芳酮和DMF的发生反应，偶联后发生卡宾重排，意外地得到苯偶姻类化合物，同时伴随着少量的二芳基二酮副产物生成，我们推测二芳基二酮的生成可能从苯偶姻的自氧化而来；进一步的研究表明，用一定量的I〓活化金属钐，该反应也可以顺利的进行，并且可以得到相对更好的实验结果。
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The mechanism of co-fluorescence effect has been discussed. In chapter six, the new fluorescence enhancement phenomenon was observed by adding some crown ethers to samarium-thenoyltrifluoroacetone system.
在第六章中，研究发现当向钐-噻吩甲酰三氟丙酮中加入配位能力很强的大环配体冠醚时，冠醚对稀土有机配合物体系产生显著的荧光增强作用，其中冠醚二苯并18冠6后（DB18C6）可使钐-TTA二元配合物体系荧光强度增强280倍。
- 更多网络解释与钐相关的网络解释 [注：此内容来源于网络，仅供参考]
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lanthanum hydropyrophosphate：焦磷酸氢钐
morphometry 形态测量学 | lanthanum hydropyrophosphate 焦磷酸氢钐 | avometer [电]安伏欧计, 万用电表
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scythe：大钐刀
hayfork, pitchfork 干草叉 | scythe 大钐刀 | sickle 镰刀
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Sm：钐
吖啶酯(acridinium ester)的发光反应(非酶促反应):二氧丁环(dioxetane)磷酸盐 ->光后者属于与化学发光并肩发展的一种同样有前途的标记免疫技术,铕(Eu)、铽(Tb)、钐(Sm)和镝(Dy)四种元素能发射离子荧光,
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samarium：钐
德国科学家在由钐(samarium)、钡(barium)、铜、氧所组成的高温超导体中,发现了类似奈米条带(nanostripe)的结构. 许多物理学家相信这类结构是超导体传导电流却没有电阻的原因,但也有人不以为然. 这些新发现不紧重启高温超导体的争论,
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samarium：钐(Sa)(金属元素)
盐浴淬火 salt bath quench | 钐(Sa)(金属元素) samarium | 抽样 sampling
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samarium poisoning：钐中毒
samarium 钐 | samarium poisoning 钐中毒 | samarskite 钶钇矿
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samarium poisoning：钐毒化
钐增加;钐形成 samarium buildup | 钐毒化 samarium poisoning | 钽铌酸钇叹q samarskite
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samarium oxide：氧化钐
samarium nitride 氮化钐 | samarium oxide 氧化钐 | samarium silicate 硅酸钐
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samarium analyzer：钐含量分析仪
samarium aluminate 铝酸钐 | samarium analyzer 钐含量分析仪 | samarium boride 硼化钐
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samarium sulphate：硫酸钐
samarium silicate 硅酸钐 | samarium sulphate 硫酸钐 | samarium 钐