以单质碘为催化剂合成了环戊酮乙二缩酮.Cyclopentanone ethylene ketal was synthesized with I _ 2 as catalyst.传统的缩酮化、酯化反应工业上多采用浓硫酸作催化剂.Traditional ketalization and esterification reactions are usually catalyzed by concentrated acid in industr...
Coconut palms and breadfruit trees grew at the doors of their huts.椰子树和面包树就在他们小木屋的门前生长.Philippine tree similar to the breadfruit tree bearing edible fruit.菲律宾树种,类似于面包树的可食果实.Breadfruit has the same texture as bread.面包果具有与...
PFOA and other related long - chain fluorochemicals stick to blood proteins and masquerade as digestive acids.PFOA和其他相关的 长链 含氟化合物会附著在血液里的蛋白质,假装成消化酸分子....
The desiccator tells you: Photographic apparatus should Be kept dry.干燥剂告诉你: 摄影器材,严防受潮.Application of Chip Microcomputer in Miniature Air Desiccator.单片机在小型空气干燥器中的应用.The experiment results desiccator were analyzed after in...