NMA was hydrogenated to 3 - amino - 4 - methoxyacetanilide ( AMA ) with S - Ni as catalystin liquid phase.以改性的骨架镍为催化剂催化3-硝基-4-甲氧基乙酰苯胺(NMA)液相选择性加氢制备了 3- 氨基 -4- 甲氧基乙酰苯胺 ( AMA ).Isoprene could be deeply hydrogenated to isop...
The working principle of gas liquid separator for hydrogenated unit was recommended.介绍了加氢装置气液分离器的工作原理.The structures of 0.5 ML hydrogenated Si ( 100 ) surface are simulated by empirical tight - binding ( ETB ) method.采用经...
The countryside undulates pleasantly.原野起伏，景色宜人。The road undulates through pleasant scenery.那条道路在宜人的景色中延绵起伏.The price of steel and iron products and materials undulates fiercely on the current market.当今的市场,钢铁产品和原材料的价格上下波动...
Herons Ardeidae, sparrows ( Passerinae ) and common magpies ( Corvidae ) are suggested as useful bioindicators of environmental pollution.建议选择野生鹭类 、 麻雀和喜鹊等鸟类作为指示生物监测环境中的重金属污染....
...the incredible beauty and symmetry of a snowflake...雪花难以置信的美丽和对称Dr Hallett is one of a small band of latter - day snowflake researchers.哈来特博士是现在雪花研究者中的一员.Snowflake: This ia an activity the whole family can enjoy toget...
The complications of duodenal ulcer that require surgical management are hemorrhage , perforation, obstruction, and intractability.十二指肠溃疡需外科治疗的并发症是出血、穿孔 、 梗阻和顽固性.We can admit the intractability of depravation, and still ...
Highlighting how to raise internal customer service to excellent standard.指出怎样提升内部顾客服务至优质水准.Matches flared,momentarily highlighting the faces.火柴着了,发出的光芒把众人的脸照亮了片刻。Eye - brow highlighting : Use a black mineral pigment to ...