离子交换作用

The exchange adsorption effect between sediments and praseodymium .

p H值是影响吸附作用的主要因素，随着 p H值的增大沉积物与稀土离子的交换吸附作用相应增

There are action of exchanging electron and energy in square 4L loop which is made of neighboring 4 iron ions in dilute gold-iron and copper-iron alloy By means of this action, thermoelectrical potential of alloy, magnetic moment of iron ion, Curie temperature, maximal value and minimal value temperature of resistance, specific heat increase and decrease entropy of conduction electron and negative magneto-resistance effect are calculated in this paper and the results are equal to testing value.

利用稀释的金铁和铜铁合金中相邻4个铁离子构成的正方形4L回路上的铁离子间存在交换电子和能量的作用过程计算了合金的热电势、铁离子磁矩和居里温度、电阻极大值温度和极小值温度、传导电子的比热增加和熵值减少、负磁阻效应等，与测量值相符。

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。

The resin has double effects including absorption and ion exchange; and it simultaneously has hydrophilic basic pyranyl functional groups and hydrophobic styrene frames and has good affinity to amphoteric bioreagents such as the protein.

该树脂具有吸附与离子交换的双重作用。

The following results have been obtained: 1 Expression of SbNHX1 in E. coli enhanced Na+ and K+ tolerances, but not to others; 2 The sequence from 1353-1514bp in SbNHX1 gene played a role for SbNHX1 to Na+ and K+ tolerances; 3 The Na+/H+ antiporter of Salicornia Bigelovii Torr. catalysed Na+/H+ or K+/H+ exchange with equal affinity, which indicates that the SbNHX1 is more likely to locate on member of vacuolar, and responds to transport Na+ into the vacuole from cytoplasm.

证明了SbNHX1能抵抗Na+和K+的胁迫，但对其它盐离子没有抗性；2）证明了北美海蓬子Na+/H+逆向转运蛋白基因（SbNHX1）C末端从基因的C末端1353bp至1514bp的序列在耐盐中起一定的作用；3）证明了北美海蓬子Na+/H+逆向转运蛋白（SbNHX1）对Na+和K+交换的等亲和性，对于这一点，说明北美海蓬子Na+/H+逆向转运蛋白与定位于液泡膜上的Na+/H+逆向转运蛋白的功能相似。

Objective To study the performance of ion exchange fiber adsorbing and desorbing puerarin by batch method.

目的 考察离子交换纤维对葛根素的静态吸附和解吸作用。

Objective To study the performance of ion exchange fiber adsorbing and desorbing puerarin by batch method.

摘要摘要：目的考察离子交换纤维对葛根素的静态吸附和解吸作用。

Their action with stationary phase can be adsorption,partition,ion-exchange,molecular sieving,etc.

他们与固定相间的作用可以是吸附、分配、离子交换、分子排阻等。

However, the results of the previous works about the first-order phase transition are confused and even contradict each other.In this paper, the properties of the phase transition in the transverse spin-2 Ising model with different single-ion anisotropies are studied employing mean-field theory and correlated effective-field theory.

目前，研究最活跃的是所谓的Blume-Capel模型(简单记为BC模型，是只考虑线性交换作用和单离子各向异性的Ising模型)及其扩展模型(引入横场的BC模型和引入无序的BC模型)，但关于BC模型及其扩展模型的一阶相变的结果还很模糊。

RESULTS:The peptide purified from Guangxi agkitrodon acutus venom strongly inhibited the proliferation of human ovarian carcimona cell,human gastric canc...

应用凝胶过滤和离子交换层析方法可以从广西五步蛇毒中分离出单一组分的小分子肽，其对多种肿瘤细胞的生长有抑制作用。

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。