以正庚醛 、 硫代硫酸钠和溴代正丁烷为原料,合成了正庚醛正丁硫醇缩醛.The heptanal butyl mercaptan was synthesized with heptanal, sodium thiosulfate and 1 bromobutane as raw materials.目的研究以庚醛和原甲酸三乙酯为原料制备庚醛二乙缩醛的工艺条件.Aim Enanthal diethyl acetal is prepared ...
...a light and airy bar with a wonderful view over the River Amstel...可将阿姆斯特尔河美景尽收眼底的明亮通风的酒吧The living room is decorated in pale colours that make it all the more airy...起居室装饰成淡雅的颜色，显得更加宽敞明亮。Mark followed the teacher int...
...forecasts of fierce gales over the next few days.预报未来几天有超强大风Is this building going to stand up to the strongest gales?这座楼能经得住最强劲的大风吗？This was greeted with gales of laughter from the audience.观众对此报以阵阵笑声。Yesterday, Sout...
Differential scanning calorimeter ( DSC ) showed NPN had high T _ g ( 129.7℃ ) and T _ m ( 245.7℃ ).差热扫描法(DSC ) 测定其玻璃化温度 ( Tg ) 高达129.7℃,熔点达 245.7 ℃.Oxygen bomb calorimeter was used to determine calorific value of vinass...