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- The pure compound tends to crystallize systematically into cubic form. 纯化合物倾向于系统地结晶成立方形状。
- The three different preparation methods of cyclic trioligomer are described in this paper. The chromatographically pure compound was obtained. 文章叙述了三种制备环状三聚体的方法;获得了色谱纯的化合物。
- Methods The optimal elution requirement was found by comparing several different elution agents, and the pure compound was purified by silica gel column and gel chromatography. 方法通过最佳展开剂的选择，找到硅胶柱色谱系统的最佳洗脱条件，粗分离后的供试品通过凝胶柱色谱系统分离纯化得到纯供试品。
- Acylation by acid chloride or acid anhydride and DCC methods were involved in the preparaion to avoid the tedious operation of isolation, because the pure compound could be prepared by the routine crystallization. 为避免各步反应产物不易分离带来的麻烦,分别用酰氯法、酸酐法和DCC法合成这些化合物,用常规结晶方法即可精制产物。
- After a series of separation and purification procedures,a pure compound was obtained which hnd the optimum activity,its antioxidative activity was clearly stronger than that of BHA. 经过一系列分离纯化步骤,从中得到了一种抗氧化性能很强的单体化合物,其抗氧化性能明显强于BHA。
- Kinetic resolution is one of the important synthetic methods to produce optically pure compounds. 摘要动力学拆分是合成光学纯化合物的重要方法之一。
- In the modern organic synthesis, it is an important method to synthesize optical pure compounds starting from the appropriate chiral pools. 在当代的有机合成中，采用适当的手性源来合成光学纯的化合物是一种重要的方法。
- It was pure luck that he was home when we called. 非常幸运，我们打电话时他在家里。
- The contribution values of 65 groups were obtained by correlating the 1336 experimental data of enthalpy of vaporization of 387 pure compounds. 用387种化合物的1336个数据点回归出了方程的参数以及65种基团对临界温度的贡献值。
- The center spent 3 years setting up equipment and developing its own assays before beginning to screen crude herbal extracts, active fractions, and pure compounds for bioactivity. 中心花了3年时间安装设备、开发自己的分析方法，然后开始筛选草药粗提取物、活性成分和具有生物活性的纯净化合物。
- MethodsThe methanol extracts of the pericarp of Arnebia euchroma oil extract were separated with various chromatography technologies to produce some pure compounds and their structures were elucidated by spectroscopic and chromatographic methods. 方法利用色谱法对中药紫草油膏中的化学成分进行分离;利用核磁共振、谱波谱方法对分离得到的单体化合物进行结构鉴定。
- I have the pure heart of a newborn baby. 我有一颗赤子之心。
- Pure compound parameters of the prsv eos for refrigerants 致冷剂的PRSV状态方程纯物质参数
- We must not condemn her on pure supposition. 我们不能单凭猜测就谴责她。
- Oxygen enters into many compound bodies. 氧是许多化合物的组成部分。
- Don't believe what he's saying it's pure bunkum. 别相信他的话--纯粹是胡说八道。
- A long hot bath can be pure luxury. 洗个痛快的热水澡可真是一种至高的享受。
- The fields were all covered with pure white snow. 白雪皑皑，铺满田野。
- The condition or quality of being pure or chaste. 纯洁纯洁或贞洁的状况或者品质
- Air is a mixture, not a compound of gases. 空气是气体的混合物，不是化合物。
