铌的

BET, acid amount and distribution of acidity of niobic acid catalysts were investigated.

测定了固体铌酸催化剂的比表面积、表面酸强度及表面酸量。

The structure and surface acidity of the niobic acids were analyzed by XRD, BET and TG/DTG.

用XRD、BET和TG/DTG对铌酸的结构特征和表面酸强度进行了分析。

Finally,We investigated the non-resonant ultrafast 3~order nonlinear optical properties of niobic tellurite glass(80TeO_2-20Nb_2O_5)doped with silver chloridenanocrystals.

最后，我们研究了掺杂1%浓度氯化银纳米晶体碲铌氧化物玻璃的非共振三阶非线性光学特性。

The experimental method and reaction conditions for synthesis of acetals and ketals on more than 40 catalysts such as solid superacids、 heteropoly acids、 con-exchange、 resins、 molecular sieves、 niobic acid、 vitamin C、 iodine、 sulfate、 chloride、 montmorillonite and etc.

综述了固体超强酸、杂多酸、固载杂多酸、脱铝超稳沸石、树脂、分子筛、铌酸、漆酚衍生物、维生素C、碘、硫酸盐、氯化物、蒙脱土等40多种催化剂催化合成缩醛的方法和反应条件。

The selective depression performance of four type depressants for niobite and do lomite is described.

考查 4种抑制剂对铌铁矿及白云石的选择性抑制性能。

Infrared Absorption Spectrum and X-ray Photoelectron Spectrosco-py detect and analyze the adsorption mechanism of diphosphonic acid on the surface of niobite.

同时用 ias 和XPS检测和分析了双膦酸对铌铁矿的作用机理。

The spectral bandwidth and gain of PPLN based optical parametric amplification with different noncollinear geometries have been investigated.

利用非共线相位匹配方法，研究了不同极化周期和不同非共线结构下周期极化铌酸锂晶体中的光参量放大带宽与增益特性。

It was also found that Nb+Ti microalloyed steel(0.02%Nb＋0.012%Ti ) is more difficult to recrystallize when coiled at 600℃.

低温（600℃）卷取时，铌钛复合微合金化钢的退火再结晶更难，800℃×30s连续退火可以保证完全再结晶。

These results indicate that the tetravalent ions doped LiNbO3 will be the excellent nonlinear optical crystals.

这些实验结果表明，四价掺杂铌酸锂晶体有望成为出色的非线性光学晶体。

A condensed soft optical phonon mode originates from the triply degenerate symmetric in-plane O-Nb-O bending.

一个软光学声子模来源于在铌-氧平面内的三重简并对称弯曲振动。

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。