Mutants which are used in a novel microbiological process to selectively degrade steroids having 17-alkyl side chains of from 2 to 10 carbon atoms, inclusive, to 9 alpha -hydroxyandrostenedione (9 alpha -OH AD). 9 alpha -OH AD is a valuable intermediate to make useful steroids....
日本OZAK滚珠花键 丝杆L13OH LFDTC16BUU LFTB13UU轴承代理商 面议 本店由搜货宝运营支持 获取底价 昆山布朗宁机电设备有限公司 商品描述 价格说明 联系我们 获取底价 商品描述 价格说明 联系我们 品牌 NB 是否进口 是 内径 10 外径 20 重量 3 导轨长度 232 直线轴承个数 12 是否带导向轴 是 适用...
中间体1 实施例17 向中间体1(1g,1.24mmol)在MeOH(35mL)中的溶液中加入三乙胺(0.585mL,4.2mmol)和3-喹啉甲醛(164mg,1.04mmol),将反应混合物在室温搅拌18小时,然后加入NaBH4(94mg,2.48mmol)。将反应混合物再搅拌3小时,然后蒸发溶剂。将蒸发溶剂后所得的残余物溶于水中,将pH调节至9.5,用DCM萃取。将合并的有机...
2由CO、HCOOH 和 H2COHOOH 三种物质混合的蒸汽中,测得其中 H 元素的质量分数为 a,则混合物中碳元素的质量分数为( )A.2(1−9a)7B.2(1−7a)9C.1−7aD.3(1−9a)7 3由CO、HCOOH和H2COHOOH三种物质混合的蒸汽中,测得其中H元素的质量分数为a,则混合物中碳元素的质量分数为( )A. 2(1−...
-Oh,verysorry.Iforgotto___you! A.invite;invitationB.invitation;invite C.invite;inviteD.invitation;invitation ()2.Hermostmoneygoeson___.Nowshelooks___. A.fashion;fashionableB.fashionable;fashion C.fashion;fashionD.fashionable;fashionable ()3.Theboy...
S1: Oh, you’re an Aquarius. Step2Presentation 1.Brainstorm the vocabulary that is used to describe people’s characteristics. Encourage students to explain each word to their classmates.(提问有关人的形容词,检查学生的预习情况。) energetic active impatient selfish stubborn outgoing easy-going confide...
OH tDH-O E VIH VIL S RAM write HCLK MC SX0 to 7 M AD24 to 00 M D QM 0 to 1 MW EX M D ATA 15 to 0 tCY C VO L tCS L-W EL tAV-W EL VO H VO L tW EL- DQ ML VOL V OL tW EL -DV tW EW V OH V OL tW E H-CS H tW E H-A X tW E H-DQ MH VO H VO...
一Oh,I___take a bus,but it is snowing today. A.hardly B.never C.sometimes D.usually 3).(宿迁中考)一Can you understand what I meant? 一Sorry,I can___follow you. A.always B.almost C.nearly D.hardly 根据句意和首字母提示填空 4).(杭州中考)His legs were so weak that he could h...
9AUnit1AncientGreece(古希腊)测试卷〔上海中考模拟类型〕-二期课改九年级月考复习资料〔学案〕=1\*romani.QuizTime=1\*ROMANI.Choosethebestanswer(20分)()1.-Haveyougote-mailaddress?-Oh,yes.Mineiswhpy146@hom.A)aB)anC)theD)/()2.Thesebooksaren’tJim’s.Theybelongto.A)myB)meC)mineD)myself()...
Ferner müssen diese hydratisierten und/oder solvatisierten Moleküle in einem stöchiometrischen Verhältnis zu der Kernverbindungsgruppierung festgestellt werden und sind dadurch eindeutig von adsorbierten Wasser- und/oder Lösungsmittelmolekülen unterscheidbar. Die Röntgenkristallographie ...