查询词典 cation

The basicflows are computed by a low-dimensional Galerkin method.The results confirm thattwo times global mode switching occur with increasing Re up to which the Hopf bifur-cation occurs when the absolutely unstable region cover the whole reversed flow region,and the first explanation of this phenomenon with absolute/convective instability theoryis given.

结果证实了只有当绝对不稳定性区域完全覆盖了回流区才会形成整体的Hopf分叉，此前随着Re数的增加整体模态经历了两次跳跃；并首次用绝对/对流不稳定性理论解释了这一现象。

All these observation furthers demonstrated the excited state properties of platinum polypyridyl acetylide complexes could be tuned by ancillary acetylide ligand. Proton or metal cation could be used as switch to change the order of the lowest excited state from LLCT to MLCT.

以上工作从另一角度再次证明，利用辅助配体的电子效应，能明显改善三联吡啶Pt络合物的激发态性质，其中质子或金属离子有效调节HOMO轨道的能量，实现了LLCT激发态向MLCT激发态的转换。

Acetylsalicylic acid was synthesized from salicylic acid and acetic anhydride catalyzed by strong-acid cation exchange resin.

以水杨酸和乙酸酐为原料、强酸阳离子交换树脂为催化剂合成阿司匹林。

Because acid rain can transport excessive hydrogen ion into the soil, then cause decrease of pH value and cation saturation, accelerate acidify of soil, therefore, it is significant to study the ecological effects of combined pollution for heavy metals under intimidation of acid rain in the regions where acid rain often take place.

土壤吸附-解吸试验的土壤按照既定方案处理后，在25±1℃，土壤水分20％左右条件下培养2个月，待重金属元素与土壤的反应基本稳定后制样进行等温吸附—解吸试验，研究紫色土在单一及复合条件下镉、锌的吸附特征和酸雨胁迫下的解吸特征以及此条件下吸附一解吸与镉、锌生物有效性的关系。

Bovine antimicrobial peptides Bac7 and Bac5 are linear cation micromolecular polypeptides, which play an important role in both innate and acquired immunity.

牛抗菌肽Bac7和Bac5是一种线性阳离子小分子多肽，在机体天然免疫和获得性免疫中都发挥着重要作用。

Cation for it with an addend of offset.

本命令寻找或创建一个符号表，并用offset作偏移量的增量，为此符号表产生一个VTABLE

1,6-Dimethyl adipate with selectivity of 100% was synthesized by batch and continuous esterification process using adipic acid and methanol as raw materials,DNW-I strong-acid cation exchange resin as catalyst.

摘 要：以DNW-I型强酸型正离子交换树脂为催化剂，己二酸和甲醇为原料，经间歇酯化和连续酯化反应后通过精馏可制备选择性为100%的1，6-己二酸二甲酯。

Their cation binding behavior to alkali and heavy metal ions was evaluated by solvent extraction of aqueous metal picrates.

进而采用溶剂萃取的方法研究了它们与一价金属阳离子的键合行为。

The effect of three common hydro-chemical factors,such as univalent cation concentration(Na+ ion concentration),bivalent cation concentration(Ca2+ ion concentration) and pH value on clay particles releasing in sand column was studied through batch test.

通过批量试验，对一价阳离子浓度，二价阳离子等，浓度(Ca2+浓度)和pH值三个最常见水化学因素对砂柱中粘土颗粒释放的影响进行了研究。

The column test results show that the cation exchange adsorption mainly manifests the K+and Ca2+ exchange in three kinds of typical soil medium, and the cation exchange function compares the sandy gravel column and the fine sand column is more remarkable in the silty clay column.

测试结果分析表明，在3种典型土壤介质中，阳离子交换吸附作用主要体现为K+与Ca2+之间的交换，且粉质粘土柱中阳离子的离子交换作用较砾石含砂柱和细砂柱更为显著。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。