9s

Synthesis of derivatives of ( 9S ) - 12-methylene erythromycin and their antibacterial activity in vitro

（9S）-12-亚甲基红霉素衍生物的合成及体外抗菌活性

Application of electromechanical integration on TDS 9S top drive is analysed , and study on butt joint in mechanical control logic with control software procedure are introduced in this paper .

分析了机电一体化技术在TDS-9S顶驱上的应用，研究了机械主体的控制逻辑与微机控制软件流程的对接。

The union distribution indicates that the frequency peak of occurrence falls on the kind of wave of 0 . 5 ~ 1 . 9m in height , 4 . 0 - 6 . 9s in period .

本区的波高和周期的联合分布表明，波高在0.5～1.9m，周期为4.0～6.9s类型的浪在该海域出现频率最高。

Constitution of wheat leaf rRNA was very complicated , besides of 25S rRNA and 18S rRNA in cytoplasm , there exist large amounts of 23S rRNA , 16S rRNA and 9S rRNA of chloroplast .

不同器官的总RNA以小麦乳熟期籽粒中含量最高；研究表明小麦叶片的rRNA组成比较复杂，除含有细胞质25S和18SRRNA，还存在大量的叶绿体23S、16S和9SRRNA。

The wind wave with the direction NNE and the swell with the direction E are most frequent in the area . The frequency peak of occurrence falls on wind waves and surging waves of force-four in height with periods of 4.0-4.9s and 7.0 ~ 7 . 9s , respectively .

波高为4级的风浪和涌浪，其周期分别在4.0～4.9S和7.0～7.9S之间时，它们的出现频率最高。