目的: 合成新的双-胡椒醛缩二胺类席夫碱化合物.Methods: Five Schiff bases were prepared from piperonal and diamines by condensation reaction.用胡椒醛为起始原料,经氯化 、 水解、缩合,制得血凝酸胺.After the process of chlorination, hydrolytic decomposition and condensat...
There are large amounts of aluminum silicate in the area.这个地区有大量的硅酸铝。Adsorption of activated magnesium silicate limonin from the orange juice and lemon juice were studied.研究了活性硅酸镁吸附橙汁和柠檬汁中的柠檬苦素.lithium aluminum silicate锂...
...a keypad that lights up when you pick up the handset...拿起听筒就会发亮的电话键盘Creating the terminal used for audio playback ( usually speakers or a handset ).正在为音频播放所使用的终端 ( 通常是扬声器或手持话机 ).Be responsible for the quality of hands...
Third, the internet cafe has a lot of disadvantages to us, as too many people.第三, 网吧对于我们有许多不好因素, 比如人口杂乱.East outer provinces have libraries, a good environment, but also electronic room, Internet cafe is.东外环有省图书馆, 环境很好, ...