Effects of copper, manganese and pH on the growth and several enzyme activities of mycorrhizal fungus Cenococcum geophilum Fr.

Ｅｆｆｅｃｔｓｏｆｃｏｐｐｅｒ，ｍａｎｇａｎｅｓｅａｎｄｐＨｏｎｔｈｅｇｒｏｗｔｈａｎｄｓｅｖｅｒａｌｅｎｚｙｍｅａｃｔｉｖｉｔｉｅｓｏｆｍｙｃｏｒｒｈｉｚａｌｆｕｎｇｕｓＣｅｎｏｃｏｃｃｕｍｇｅｏｐｈｉｌｕｍＦｒ．￥ＫｏｎｇＦａｎｘｉａｎｇ；Ｚｈａ...     

Study on catalysts for combustion of lean CH4

In this study, cerarnics honeycomb-supported ABO₃ perovskite type oxides were preparedby changing the composition of A and B site cations, and observed their activities for lean CH₄ oxidation. In the case of change in A site composition La_0.3Sr_0.2MnO₃ and La_0.6Sr_0.4MnO₃ is the mostactive catalysts for 1 v% CH₄ and 2 v% CH₄ respectively. But LaMn_0.5Co_0.5O₃ oxide is the best ac-tive catalyst for 1-2v% CH₄ among the oxides by changing B site compositions of LaBO₃ and su-perior to La_0.3Sr_0.2MnO₃ and La_0.6S_0.4MnO₃catalysts.Adding trace Pd improved the activity and characteristics of space velocity for LaMn_0.5CO_0.5O₃and La_0.3Sr_0.2MnO₃ Although LaMn_0.5Co_0.5O₃ +Pd (0.03 wt%) was less active than the Pd catalyst,the activity was more than Pt catalyst at a conversion level below 90%.     

Simulated seasonal movement of precipitation zone in rainy season over China and its change on CO2-doubling

In this paper, an investigation of simulated monthly precipitations from April to September is made. Though the precipitations are sometimes overestimated or underestimated, the geographical advance and recession of precipitation zones are well simulated by the UKMO global climate model with a simple mixed-layer ocean. Main characteristics of large-scale precipitation distribution are changed less on CO₂-doubling, but the change is significant in some regions. The change in precipitation threatens us while the dry region is imposed by rainfall defect or the wet region by abundant rainfall induced by CO₂-doubling.     

Effect of SO2-polluted rape plant on growth and reproduction of the turnip aphid,Lipaphis erysimi(Kaltenbach)

ＥｆｆｅｃｔｏｆＳＯ_２－ｐｏｌｌｕｔｅｄｒａｐｅｐｌａｎｔｏｎｇｒｏｗｔｈａｎｄｒｅｐｒｏｄｕｃｔｉｏｎｏｆｔｈｅｔｕｒｎｉｐａｐｈｉｄ，Ｌｉｐａｐｈｉｓｅｒｙｓｉｍｉ（Ｋａｌｔｅｎｂａｃｈ）￥ＷｕＫｕｎｊｕｎ；ＧｏｎｇＰｅｉｙｕ；ＬｉＸｉｕｚｈｅ?..