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- hard acid ion complex 硬酸离子配合物
- Side Arms Chelation Effect of Tetraaza-18-Crown-6 and Its Armed-Derivatives With the Hard Acid Ions 四氮杂18-冠-6及其臂式衍生物与硬酸离子螯合的边臂效应
- Three different zones A,B,C have been tested to F, Cu, Zn, Se,Ca,P and Sulfuric acid ion in soil,water,blood and diet. 通过A、B、C三个不同地区的土壤、饮水、饲草料、血液中F、Cu、Zn、Se、Ca、P和硫酸根离子的检测，证实了A区饮水氟为2.;7mg/L，硫酸根离子为165
- The calix[4]arene metal ion complex formation constants in solvent polymeric membrane were determined directly by potentiometry with a two layer sandwich membrane electrode. 合成6个硒功能化杯芳烃为载体,采用双层夹心膜电位法直接测定了溶剂聚合物膜中载体与金属离子生成的络合物生成常数。
- A study of dye-surfactant ion complexes,Congo red(CR),an anionic dye,with Cetyltrimethyl ammonium bromide(CTAB) complex,is carried out. 以十六烷基三甲基溴化铵为表面活性剂,与阴离子型染料刚果红形成缔合物,对该缔合物的溶剂气浮过程进行研究。
- In this paper, the methyl cinnamate was synthesized from cinnamate acid and methanol by using strongly acidic ion exchange resin as catalyst. 以磺酸型阳离子交换树脂为催化剂，由肉桂酸和甲醇合成了肉桂酸甲酯。
- The frontier orbital theory was used to explain the soft hard acid base principles,and the soft hard acid base principles were used to explain the stabilities of supramolecular chemical compounds. 运用前线轨道理论解释了软硬酸碱原理,并利用软硬酸碱原理解释了超分子化合物的稳定性,及电子原子种类对离子选择性的影响。
- The main characteristics of this method are that reaction is quick, purity is high, operation is simple, clean fatty acid ion replaces halogen ion that is noxious, and it is greener. 该方法的主要特点是反应快速纯度高，操作简便，清洁的脂肪酸离子代替有毒的卤素离子，更加绿色。
- In addition to free CO2 and O2, the meteoric water contains dissolved H+,HCO_3~-, HSO_4~(2-), sometimes organic acid ions, various kinds of salt ions and complex ions, all of which can be involved in the weathering. 这种大气水中除了含有游离的CO2、O2气体之外，一般还溶解有H+、HCO_3~-、HSO_4~-离子、络合离子，有时还含有有机酸离子，各种盐类离子、络合离子，这种化学条件下都能进行风化作用。
- The chelating surfactant,with a ED3A hydrophilic group,has excellent surface activity and metal ion complexing actions. 以ED3A为亲水基团的螯合性表面活性剂同时具有良好的表面活性和络合金属离子的作用。
- It is hard to sleep without a cooler in this room. 没有空气调节器，在这间屋里很难入睡。
- With hydrogen sulfide and tetrapropylene as raw materials, TDM was synthetized by the one step process in the presence of acidic ion exchange resin. 摘要 以硫化氢和十二烯为反应原料，以酸性离子交换树脂为催化剂一步合成叔十二碳硫醇。
- low concentration of inorganic acid ion 低无机酸离子
- sulfonie acid ion exchange resin 磺酸型阳离子交换树脂
- John felt it hard to rig out his family. 约翰感到难以为一家大小置备衣着。
- The hard core in the party make all the decisions. 这个党的核心成员决定一切。
- Hard copy is computer output on paper, printing or graphics. 硬拷贝是出现在纸上、印刷上或图表上的电脑输出。
- I scrubbed hard at the stain to see if I could get it off. 我使劲擦这个污迹，看能不能将它去掉。
- It's natural to slack2 off towards the end of a hard day's work. 一天紧张工作快结束的时候有些放松是自然的。
- He pushed hard on the brake pedal to avoid a collision. 他使劲踩下煞车踏板以避免撞车。
