查询词典 Nb

NB can make liver, brain, spleen and nephridial tissue pathology damage, to refrain theactivity of liver mixed function oxidase, induce oxidative stress, effect tissue enzymatic activity,destroy organism antioxygen defence system and function of clean up free radical, to cause proteinoxidation damage, to educe toxic action.

综上所述，NB可以造成肝、脑、脾、肾组织的病理学损伤，抑制肝内混合功能氧化酶的活性，诱导氧化应激，影响组织酶活性，破坏机体抗氧化防御系统及清除自由基功能，引起机体蛋白质氧化损伤，进而发挥其毒性作用。

In this thesis, we intended to eliminate the a -Fe phase by adjusting the composition and the cooling velocity. The effects of Sm content, cooling velocity and the additions of Nb and Zr on the microstructures of Sm-Fe alloys and magnetic properties of Sm2Fe17Nx were studied. Effects of nitrogenation techniques on magnetic properties were also studied.

本文力图通过控制合金成分及冷却速度的方法来消除Sm-Fe合金中初生的α-Fe相，系统地研究了Sm含量，凝固速度及Nb和Zr的添加对Sm-Fe合金微观组织的影响，及合金成分和氮化工艺对Sm_2Fe_(17)N_x磁性能的影响。

The possible reason is that doped Zr〓 ion enters the interstitial sites for its small ionic radius and no dipole complexes were formed. Monovalent ion F〓 has been reported to improve the scintillating performance greatly. Our results show that Agrand diagrams of F〓: PWO crystals obey an modified Cole-Cole equation. The crystals present similar dielectric relaxation phenomena to but have much higher activation energy than that of RE〓: PWO crystals, which originate from the 〓 dipole complexes. The co-doping of trivalent Y〓 and pentavalent ion Nb〓 does not always show a better scintillation performance than that of solely doped samples, which could be attributed to the existence of the 〓 dipole complexes, which counteract the solely doping effect.

而Zr〓由于离子半径太小，可能进入间隙位置，不形成类似的偶极缺陷；一价负离子F〓的掺入提高了晶体闪烁性能，阻抗谱测试结果表明F〓：PWO晶体Argand图符合修正的Cole—Cole方程，晶体同样表现出介电弛豫现象，并具有比RE〓：PWO晶体中高得多的弛豫激活能，可能起源于形成的〓偶极缺陷；Y〓和Nb〓双掺的PWO晶体并没有显示出两种离子单掺优点的叠加，阻抗谱测量结果表明，在双掺晶体中可能形成〓偶极缺陷，使两者掺杂作用相互抵消。

The chemical activity of PbO and Nb〓O〓 is much higher than that of MgO. It results in that pyrochlore phases are easily formed. Performances of 〓 solid solution are damaged when pyrochlore phases exist.

由于MgO的化学活性低，而PbO和Nb〓O〓的反应活性大大高于MgO，因此在一次性合成PMNT材料过程中会形成烧录石相，得不到纯钙钛矿相，并且将导致材料性能下降。

Catalysis of thecomplex mental oxides can be greatly effected by it's redox property. In the present work, a significant study on the oxidation performance and re-oxidationperformance of Mo-V-Te-Nb-O catalyst was carried out using a pulse reactor in which theoxidation of propane and the reoxidation of catalyst were taken place alternatively.

我们利用脉冲反应器，催化剂预氧化与丙烷氧化反应轮流进行，重点考察了反应条件下Mo-V-Te-Nb-O催化剂氧化丙烷的性能及其再氧化性能，并对催化剂的结构进行了表征。

Some of the physical parameters of Ni-Pe-Nb and 4Mo-permalloy are tabulated here for comparison.

我们对Ni-Fe-Nb和4钼坡莫合金的物理参数进行了比较。

The results show that both norbornenic and cyclopentenic double bonds are involved in the polymerization. The propagation on the NB double bond generates structural unit I by direct addition and unit II by carbocation rearrangement, respectively. Similarly, the propagation on the CP double bond produces structural unit III by direct addition and unit IV by transannular rearrangement, respectively.

结果表明， DCPD分子的降冰片烯双键和环戊烯双键均参与了聚合反应并根据不同链增长机理产生四种链结构单元：通过NB双键的链增长反应可生成直接加成结构单元I和重排结构单元II，通过CP双键的链增长反应生成直接加成结构单元III和跨环重排单元IV。

In a word, mass! Recently undeliberated NB was popular, like old saying of making all clear without mention a word, using Beijing dialect it's much easier --"B-Pretending", represented by part small star blogs and strange name blogs, more over the writing is, the better it can up to people's demands, just like Taiwan entertainment programs, but it cannot be formal, as it's not necessary to collect and publish a book. Talk about Taiwan entertainment programs I had to mention Jacky Wu, this man who was characterized by A use his own power saved many programs, and it's really funny. Recently I always view "People in the Pan", it stands for another Taiwan entertainment character -- imitation, it makes me laughing a lot, and I can refer a sentence from Dong Lu's blog "If Li Yong comes to Taiwan he must lose his job." Fortunately ordinary family cannot see these Taiwan TV Stations, or CCTV cannot defend its market share, in fact it's forced by a loose competitive atmosphere, the fact that Hunan TV is so hot now in China reminds me what an ancester said: a kid became famous only because of there is no hero in world.

这两 年流行的网络文字是不经意间的NB，就像古话说得&不着一字尽得风流&，拿北京话说就简单多了叫&装B&，以部分小明星的博和名字怪异的为代表，文字越潇洒或者越俗越能迎合大家的需求，就像台湾的娱乐节目，不过上不了台面，如果硬要出个书什么的我看大可不必，说起台湾娱乐节目，不能不提吴宗宪，这个活跃舞台几十年的以A为特点的全才中年男子以一己之力养活了很多节目，而且确实很好笑，最近我看的比较多的是全民大闷锅，代表台湾娱乐的又一大特点－－模仿，常常能让我前仰后合，不由想到董路 BLOG上的一句话，&如果让李咏去台湾肯定会失业&，还好现在台湾的这些台普通家庭还看不到，不然CCTV一定招架不住，其实说白了都是一个宽松的竞争环境逼的，湖南卫视现在在大陆这么火，让我想到一句话：世无英雄，遂使竖子成名。

The hardened aluminides layer,about 200 nm in thickness was obtained and with increasing the Nb ion dose the hardness of the Al surface could increase up to three times larger than that of the unimplanted one.

随着注入剂量的增加，Al3Nb结晶的质量变好，当Nb离子剂量达到8×1017ions／cm2时，在铝的表面形成了约200 nm厚的金属化合物。随着注入剂量的增加，铝表面的硬度和弹性模量显著提高。

The ammoniating temperature, ammoniating time and the thickness of the Nb films greatly affected the crystalline quality, morphology and photoluminescence properties of the GaN nanomaterials.

研究表明，氨化温度、氨化时间和金属催化剂Nb的厚度对一维GaN纳米材料的结晶程度和形貌具有很大的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。