Thus , this reduced temperature of reaction and increased the rate of acetophenone.降低反应温度,提高了苯乙酮的收率.Objective: A new approach to prepare α - bromo - 4 - benzyloxy acetophenone was introduced.目的: 报道一种合成α - 溴-4-苄氧苯基乙酮的新方法....
Methods: α - Bromo - 4 - benzyloxy acetophenone is synthesized with 4 - hydroxy acetophenone and bromonium as materials and methanol as solvent.方法: 以甲醇为溶剂,以对羟基苯乙酮和溴为原料制备了α - 溴-4-苄氧苯基苯乙酮.Thus , this reduced temperature of...
出版商预计该书至多能卖出1,500本。The publisher expected the book to sell 1,500 copies, tops.他通过网络把作品发给了出版商。He sent his work to his publishers by modem.她的出版商想让她在小说中增添些性描写以吸引读者。Her publisher wants her to spice up her stories with sex....
The survival of the proteins depends on the way in which bones are fossilised.蛋白质是否存留取决于骨头被石化的方式。Of course, fossilised bacteria would be expected to leave carbon traces too.当然, 细菌化石也应留下碳元素的痕迹.Researchers have discovered ...
It must be a hard life, working as a Lumberman in Siberia.在西北利亚当一名伐木工人,生活一定很艰苦.A bullnecked lumberman guides them through a buzzing circular saw, slicing them into rough boards.一名脖子粗短的伐木工引导它们通过嗡嗡作响的圆锯,将它们锯成粗木板.The lumber...