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- Optical active ethyl 4-cloro-(R)-3-hydroxybutyrate was prepared by stereo selective bioreduction of ethyl 4-chloro-acetoacetate with baker's yeast. 以4 氯乙酰乙酸乙酯为原料,以面包酵母为手性生物催化剂,选择性合成光学活性4 氯 (R) 3 羟基丁酸乙酯。
- The dimethylamine selective synthesis catalysts have been prepared by using modifiedmordenite as the active material and two kinds of catalyst binders. 采用改性丝光沸石和两类粘结剂制备选择性合成二甲胺催化剂。系统地考察了催化剂对甲醇和氨的反应性能。
- Abstract: Supramolecule chemistry is an advanced research topic in current chemistry, and the selective synthesis of the host compound is an important aspect. 摘要: 超分子化学是当今化学界的前沿学科之一，超分子主体化合物的选择性合成是其一个重要的方面。
- A study on lipase-mediated selective synthesis of monoglyceride 脂酶催化下选择性合成单酸甘油酯的研究
- This programme is being broadcast in stereo. 这一节目正用立体声播出。
- This program is being broadcast in stereo. 这个节目正用立体声播放。
- We're being deafened by next door's stereo. 隔壁的立体声音响要把我们耳朵震聋。
- Cerium modified mordenite for selective synthesis of dimethylamine 铈改性丝光沸石用于合成甲胺
- Who originated the concept of stereo sound? 立体声是谁发明的？
- Father bought her a stereo radio. 父亲给他买了只立体声收音机。
- Selective synthesis of glycerol monostearate with high purity 选择性合成高纯度甘油单硬脂酸酯
- Most farmer have a stereo type hayseed image. 大部分农民都有一副固定的乡巴佬形象。
- This is no time to lash out on a new stereo. 现在不是奢侈花钱买新立体音响的时候。
- Listening to a good stereo system always freaks me out. 我一听到好的立体声音乐就乐不可支。
- She helped to select a dress for Ruth. 她帮着给露丝选了一件衣裳。
- Listening to a good stereo system always freak me out. 我一听到好的立体声音乐就乐不可支。
- She is selective in the dresses she wears. 她对于自己穿的衣服精挑细选。
- Left a$100 deposit toward the purchase of a stereo system. 为了买一套立体声系统，留下了100美元的订金
- She only stays at select hotels. 她只住一流旅馆。
- Keywords Titanocene catalyst;Atactic polybutene 1;Stereo selectivity; 单茂钛催化剂;无规聚丁烯-1;立体选择性;
