在催化剂存在下,用双氧水氧化乙二醛溶液快速合成了乙醛酸.Glyoxylic acid was rapidly synthesized by catalytic oxidation of glyoxal with H 2 O 2.利用报废的液体推进剂硝酸-27S和乙醛制备乙二醛.Glyoxal is prepared with waste liquid propellant HNO 3 - 27 S and ethanal.乙二醛 、 乙...
The cocoa industry dwindled because it became increasingly difficult to cover costs.由于越来越难以收回成本，可可产业日渐衰落。The factory's workforce has dwindled from over 4,000 to a few hundred...工厂雇员总数已经从 4,000 多人减少到几百人。Longfellow, L...
目的研究潜溶剂和环糊精对难溶性药物的联合增溶作用.Aim To investigate the combined effect of cosolvent and cyclodextrin ( CD ) on solubilization of insoluble drugs.目的:探讨溶出介质的离子强度对难溶性药物的丙基甲基纤维素(HPMC)骨架片释药的影响.OBJECTIVE To study the effect of ionic ...
欧洲建筑商联合会拥有逾35万家建筑公司会员。The European Builders Confederation has a membership of over 350,000 building companies.他们的会员似乎已经增加到约1万名以上。Their membership seems to have risen to something over 10,000.会员们几乎一致表示反对这些测试。Its members h...