查询词典 Nb

The transfer behavior of pyrazolone derivatives, such as antipyrine, aminopyrine, 4-aminoantipyrine and analgin, across the W/NB interface was investigated. The three medicines studied can form complex with a proton and the complex formed can transfer reversely across the W/NB interface and the transfer process was controlled by diffusion. The transfer of protonated analgin was not observed within potential window because of its high transfer potential.

研究了吡唑啉酮类的安替比林、氨基比林、4-氨基安替比林和安乃近四种药物在W/NB界面的转移行为，前三种药物在一定pH值的水溶液中结合一个质子形成1∶1质子配合物，并能在W/NB界面发生可逆转移，其转移过程受扩散控制，安乃近的质子化物由于有较高的转移电位而未在电位窗内观察到其转移峰。

The result shows that the BH value of the Nb-ULC and Ti-Nb-ULC composition series fluctuates relatively little.

介绍不同成分体系的极低碳烘烤硬化钢汽车板实际生产情况，生产结果表明：Nb-ULC、Ti-Nb-ULC成分体系的BH钢BH值波动较小。

Deformation greatly promoted carbonitride isothermal precipitation and made C-curve shift leftwards. The position and shape of C-curve depended on the content of Nb and N to a great extent, C-curve shifted leftwards a little when N content increased and its nose temperature was raised with Nb content increased. 3 when cooling rate increased, start temperature and finish temperature of continuous cooling precipitation decreased, full precipitation became difficult to take place, the volume fraction of carbonitride precipitation decreased, molar fraction of Nb and C dissolved in austenite increased, and the precipitation grain was further refined. Deformation shorten precipitation start time during continuous cooling, raised precipitation start temperature, accelerated precipitation kinetics of carbonitrides.

计算表明：1在Fe—Nb—C系统中，随着温度的降低，析出相的平衡体积分数增加，溶解在奥氏体中的Nb、C的摩尔分数降低，析出相中C和Nb的原子分数的比值v增加；2变形大大促进了碳氮化物的等温析出，使C曲线左移，Nb和N的含量与C曲线的位置和形状有一定的关系，N含量的增加，使C曲线略有左移，而Nb的含量的增加使得C曲线的鼻子区上移；3随着冷却速率的增大，连续冷却析出的开始温度和结束温度均有所降低，并且析出变得越来越不充分，析出相体积分数明显减小，溶解在奥氏体中Nb和C的摩尔分数增大，析出相粒子被明显细化，变形大大缩短了CCP过程碳氮化物析出的开始时间，提高了析出的开始温度，促进了析出动力学。

Study on the lithology and petrology (fine-grained cold-quenching ring of the enclaves, the reverse vein, the complex enclaves, the plagioclase phenocryst from both host rock and enclaves that is consist on the crystal form, composition and light, et al.), petrogeochemistry (Y/Nb=2.77～6.82, La/Nb=0.91～4.33, Ba/Nb=0.13～37.86, et al.), Sr and Nd isotope most ISr between 0.7031～0.7041,εNd(t=5.2～7.1 and LA-ICP-MS zircon U-Pb dating (the host rock age is 311±12Ma, and enclaves is 306±7Ma), believe the Huangyangshan pluton is crust-mantle hybrid genesis.

通过岩石学和岩相学（包体细粒淬冷边，反向脉，复合包体以及寄主岩石和包体中斜长石斑晶在形态、成分、光性上的一致性等），岩石地球化学（Y/Nb=2.77～6.82，La/Nb=0.91～4.33，Ba/Nb=0.13～37.86等），Sr和Nd同位素（ISr多数在0.7031～0.7041，εNd在5.2～7.1之间）以及LA-ICP-MS锆石U-Pb测年（寄主岩石为311±12Ma，包体为306±7Ma）综合研究认为黄羊山花岗岩是壳-幔源岩浆混合成因的。

Results: The average healing duration was 10.24±2.89 days in NB-UVB group, while it was 26.45±3.47 days in the other group. Using t test, significant differences were found between the two groups. Conclusions: NB-UVB exposure significantly decreased the courses of pityriasis rosea, suggesting that it is a preferable therapy for pityriasis rosea.

NB-UVB照射治疗组治愈时间明显短于皿治林口服加尤卓尔外用治疗组，NB-UVB照射治疗可以有效的缩短玫瑰糠疹的病程，不失为一种较好的治疗方法。

It Was found that a complex ordered carbonitride is formed on hot-rolling and continuous cooling by the precipitation of Nb and V together with C and N in which the contents of Nb and V are changeable.

利用透射扫描电镜和能谱仪对Nb-V微合金化钢中Nb和V析出相进行了研究，发现Nb和V在高温形变和连续冷却中，与C，N形成一种复杂的有序碳氮化物，其中Nb与V的含量是可变的，其浓度比值C_(Nb/C_V随着析出颗粒尺寸的减小而递减，化学式可写成C_(1-x，N_(1-y)。

Subchondritic or approximate chondritic Nb/Ta rations are observed in mantle-derived plagioclase granites and alkaline granites related to the tectonic settings of rift or hot sports. General granites possess very low Nb/Ta (0), even Nb/Ta ≤1 for highly evolved granites.

花岗岩中的幔源斜长花岗岩及与裂谷、热点环境有关的碱性花岗岩Nb/Ta比值近于地球平均值，而普通S型及I型花岗岩，特别是高演化花岗岩，Nb/Ta比值均明显低于球粒陨石(0)，甚至呈现Nb/Ta≤1。

E. Nb〓C twins and erose Nb〓C phase, which maybe influence the property of Nb-Si system intermetallics markedly.

在Nb相上还发现Nb〓C相，表现为孪晶和不规则状两种形态，这是由于热处理过程中碳杂质的引入所造成的，微量杂质元素的存在可能会对材料的性能造成很大的影响。

Generally, there are two stages throughout the reaction of Si〓N〓 and interlayer. At the first stage, the liquid Cu enwraps Nb phase, and Nb diffuses into the Cu. The reaction layer of NbN and Nb〓Si was caused between Nb and Si〓N〓.

第二阶段，Cu全部熔化，Ni向液态金属中扩散溶解，形成Cu-Nb-Ni液态合金，液态合金中的Nb、Ni向Si〓N〓界面扩散并与之反应形成由NbN、Nb〓Si和Ni〓Si组成的反应层。

When Nb segregates at grain boundary, the bonds across grain boundary are strengthened, while the interactions between Nb and its neighboring atoms are weakened.

Nb和Ti周围的Fe原子相互作用有所减弱，而Nb和Ti原子两边的跨晶界的原子间的相互作用加强，反映了替位Nb、Ti原子强化Fe晶界的作用。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。