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已读[343] 发布: 2013/05/20 14:27:01
经精制加工后,可得到的产品有:二硫化碳、苯、甲苯、三甲苯、古马隆、酚、甲酚和吡啶盐及沥青等,这些产品有广泛的用途,是合成纤维、塑料、染料、合成橡胶、医药、...
已读[366] 发布: 2013/05/19 17:35:15
Independent Online The problem is the mud . Stir the seabed on this bit of the Anglesey coast and up like a hurricane comes this prehistoric slush. Water that was seconds ago crystal, hard-looking and glassy is suddenly dark - it is like being caught in a desert sandstorm ...
已读[74] 发布: 2013/05/13 21:35:23
目前在成都与泸州两地建成有三套引进大化肥装置、三套中型氮肥装置、六套三聚氰胺装置、两套甲醇装置以及农药、黄血盐钠生产装置。宁夏、内蒙古等地正在兴建大化肥、二...
已读[381] 发布: 2013/05/09 19:08:49
The Independent The problem is the mud . Stir the seabed on this bit of the Anglesey coast and up like a hurricane comes this prehistoric slush. Water that was seconds ago crystal, hard-looking and glassy is suddenly dark – it is like being caught in a desert sandstorm ...
已读[296] 发布: 2013/05/02 18:18:40
Salon But when you arrest and expel students for slaking their scientific curiosity, whatever the other consequences of that action, be advised that you are almost certainly sacrificing a valuable scientist at the altar of arbitrarily wielded state and ... and more »
已读[77] 发布: 2013/05/02 17:46:07
Scientific American (blog) One time I mixed potassium permanganate with glycerol to spark a bright burning fire (the reaction is highly exothermic), another time I dissolved mom's safety pins in nitric acid to generate copious amounts of nitrogen dioxide; it was only later that ...
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