And by applying biogas slurry, photosynthesis rates is 16.622 μ mol · cm - 2· s - 1 , improving 26.029 % by CK.当单施沼液时, 光合速率平均值达到16.622μmol.cm -2.s-1, 高出对照26.029%.Where can we reduce or avoid existing GHG - emissions by r...
Cyclopentanone ethylene ketal was synthesized with I _ 2 as catalyst.以单质碘为催化剂合成了环戊酮乙二缩酮.The effects of reactant mole ratio , catalyst dosage , microwave irradiationtimeyield of cyclohexanone glycol ketal were investigate...
竖井是为了通风和挖掘 、 修理坎儿井时提土之用的.Shaft to ventilation and excavation, repair qanat soil when used.坎儿井引出了地下河水, 使沙漠变成绿洲.Qanat leads to an underground river, so the desert into an oasis.这些就是坎儿井的竖井口.These are the qanat mouth of the ...