查询词典 silver

The nanoparticles were characterized by virtu e of UV/Vis/NIR absorption spectrometry, transmission electron microscopy and X-ray diffractometry. The results show that silver nanoparticles could be prepared by using laser ablation, furthermore, the solvent plays im portant roles in not only the formation rate of silver particles but also the stability of the silver colloid.

通过 紫外/可见/近红外吸收光谱、透射电子显微镜和X射线衍射等方法对制备的溶胶表征，结果表明，利用激光消融法可以得到银纳米材料，溶剂不但影响银纳米粒子的形成速度，同时也影响银溶胶的稳定性。

Silver accessories are not actually the argentiferous quantity 100%, that is because joins in the pure silver 7.5% alloy, let the silver the gloss, brightness and degree of hardness have the improvement.

它与9.999银有所不同，因为9.999银的纯度比较高，非常柔软难以做成复杂多样的饰品，而925银能做到。925银饰品其实并不是含银量100%，那是因为在纯银中加入的7.5%的合金，让银的光泽、亮度和硬度都有所改善。

Results: The light microscope pictures of group A(no ［α-32P］ ATP in the perfusate) showed that there was no specially labeled silver pellet in or out of rat liver cell. But the light microscope pictures of group B (37 MBq ［α- 32P］ATP in the perfusate) showed that distribution of numerous ［α-32P］ATP autoradiographic silver pellets in rat liver cell, and no autoradiographic silver pellet was found in the hepatic sinus and vessel.

结果：灌流液中不加［α-32P］ATP的A组光镜照片显示大鼠肝细胞内外均未见特异性标记银粒显影，而灌流液中含37 MBq［α-32P］ATP的B组光镜照片显示大鼠肝细胞内可见多个大小不等的［α-32P］ATP自显影银粒分布，而肝窦及肝小叶中央静脉等血管内则几乎无黑色自显影银粒分布。

Because silver particles are stabilized by the other thermal decomposition products of silver behenate, in the range of 193°C~320°C, the formed film is not pure silver.

通过控制山嵛酸银的热分解温度可以构筑不同形态的银薄膜，在190°C~320°C，金属银被有机产物钝化，形成了掺杂有机物的金属银薄膜；当温度高于500°C时，有机产物进一步分解可以形成纯金属银薄膜。

The thermal-sensitive property of silver behenate nanocrystal was further evaluated and the feasibility of fabrication of silver film by the thermal decomposition of silver behenate nanocrystals was discussed in this dissertation.

本文还进一步评价了山嵛酸银纳米晶体的热敏性能，探讨了通过山嵛酸银热分解构筑银薄膜的可行性。

During the second transition about 231°C, a structural change took place, which corresponding to decomposition of silver behenate. The major thermal decomposition products are silver nanoparticles and behenic acid. The gas products from thermal decomposition of silver behenate were detected by MS. Carbon dioxide was first emerged, subsequently water, hydrogen, acetylene and some small molecule alkenes appeared.

采用MS对山嵛酸银在整个热分解过程中所释放出的气体产物的跟踪检测发现，首先是二氧化碳气体的放出，接着是氢气和水，随着温度的进一步升高，又伴随着乙炔和一些小分子的烯烃产生，当温度进一步升高到500℃左右时，被山嵛酸钝化的银纳米粒子逐渐失去了有机分子，最终的热分解产物为金属银。

The thermal behavior of silver behenate has been studied by infrared spectroscopy, X-ray diffraction, combined thermogravimetry-differential thermal analysis-mass spectrometry. The results indicated that complicated phase transitions took place while heating silver behenate,but there were two distinct thermal transitions. During the first transition at 138°C, the alkyl chains of silver behenate were transformed from an ordered into disordered state.

通过采用粉末X射线衍射、红外光谱、热重-差热分析与质谱联用技术，对山嵛酸银纳米晶体的热行为研究发现，山嵛酸银受热发生了一系列相转变，它有两个明显的突变：即在138℃左右，山嵛酸银的烷基链从高度有序转变为无序状态；在231℃左右，山嵛酸银发生了热分解，其主要分解产物为银纳米粒子和山嵛酸。

The effect of zeolites ion-exchanged by transition metals on thermal catalytic cracking reaction is studied. The product distributions of the cracking reactions catalyzed by theβor ZSM-5 zeolites exchanged with transition metals are different from that catalyzed by corresponding Hzeolites, which means the mechanism of cracking reactions has varied. Group Ⅷ metals Fe, Co, Ni and Cu, Zn are shown to be of strong catalytic activity of oxidative dehydrogenation, while Ti and Cr are not of oxidative activity. Catalyzed by zeolites or catalyst containing Ag, conversion of thermal catalytic cracking reactions and the yield of ethylene increase while the yield of propylene does not decrease. Silver can not only promote the formation of carbonium ion, but also convert carbonium ion into free-radical via redox reaction. The weak adsorption of olefins on silver reduces the occurrence of hydrogen transfer and dehydrogenation. As a result, the yield of light olefins is favored by silver in the catalyst.

采用过渡金属交换的分子筛作为催化剂，进行催化热裂解制取乙烯的反应，研究发现，在β沸石分子筛和ZSM-5分子筛中引入过渡金属后，催化热裂解反应的产物分布与相应的氢型分子筛相比有了较大的变化，说明过渡金属的加入对于催化热裂解反应的机理具有影响，Ⅷ族金属如Fe、Co、Ni和第Ⅰ、Ⅱ副族Cu、Zn表现出较强的氧化脱氢活性，产物中氢气、焦炭的产率很高，Ti、Cr则未表现出氧化作用：分子筛及催化剂中引入银后，催化热裂解反应的转化率和乙烯的产率有了提高，丙烯产率没有很大的变化，说明银在催化热裂解反应中能够促进正碳离子的生成，又有可能通过氧化-还原作用部分改变反应机理，促进了自由基的生成，并且由于银对烯烃的吸附很弱，其氢转移反应和脱氢、加氢活性比较低，有利于烯烃产率的提高。

Investigation of silver minerals in these ore deposits shows that the silver-bearing tetrahedrite and freibergite are among the most important or main industrial silver minerals.

在国内外几个不同成因类型的银多金属矿床内产出的黝铜矿族银硫盐矿物中，除朗达矿床见有砷黝铜矿和含银砷黝铜矿外，较普遍共同发育有黝铜矿、含银黝铜矿和银黝铜矿，而后两者则是最主要或主要的工业银矿物之一。

The Spanish Cross in Bronze was die struck in tombak or bronzed brass and the Silver can be found both in hallmarked 800 grade silver and silver plated brass.

西班牙十字勋章是铜与锌的合金或被镀青铜的黄铜和银在青铜模子制。造，能发现品质800纯度的银，并且银上镀了黄铜。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。