对不同地区的几个砂姜黑土剖面的粘粒矿物进行了 X 射线衍射分析,结果表明均以蒙皂石为主,其次为伊利石,高岭石和蛭石含量较少,仅山东高密的砂姜黑土削面含少量绿泥石。这与毗邻土壤类型迥然不同。对黑土层石英砂的 SEM 观察表明,砂姜...对不同地区的几个砂姜黑土剖面的粘粒矿物进行了 X 射线衍射分析,结果表明均以蒙皂石为主,其次为伊利石,高岭石和蛭石含量较少,仅山东高密的砂姜黑土削面含少量绿泥石。这与毗邻土壤类型迥然不同。对黑土层石英砂的 SEM 观察表明,砂姜黑土的母质均为洪(冲)积-湖沼沉积型。笔者认为,砂姜黑土中高含量的蒙皂石主要系流水悬浮而来,在湖泊静水环境中沉淀富集而成,其来源范围比粗骨颗粒部分更广泛。展开更多
The high resolution transmission electron micrographs(HRTEM) of lamellar crystal of polyethylene(PE) obtained from the melt were successfully obtained by using high resolution electron microscopy,although PE is a rela...The high resolution transmission electron micrographs(HRTEM) of lamellar crystal of polyethylene(PE) obtained from the melt were successfully obtained by using high resolution electron microscopy,although PE is a relatively irradiation sensitive polymer.The HRTEM images with a clear one-dimensional structure(reported) here were recorded in a transmission electron microscope(TEM) operated at 200 kV.The spacing(between) the fringes was found to be 0.37 nm,which is close to the d-spacing of(200) plane. Micrographs image were processed by using optical filtering methods to improve the signal-to-noise ratio.展开更多
文摘对不同地区的几个砂姜黑土剖面的粘粒矿物进行了 X 射线衍射分析,结果表明均以蒙皂石为主,其次为伊利石,高岭石和蛭石含量较少,仅山东高密的砂姜黑土削面含少量绿泥石。这与毗邻土壤类型迥然不同。对黑土层石英砂的 SEM 观察表明,砂姜黑土的母质均为洪(冲)积-湖沼沉积型。笔者认为,砂姜黑土中高含量的蒙皂石主要系流水悬浮而来,在湖泊静水环境中沉淀富集而成,其来源范围比粗骨颗粒部分更广泛。
文摘The high resolution transmission electron micrographs(HRTEM) of lamellar crystal of polyethylene(PE) obtained from the melt were successfully obtained by using high resolution electron microscopy,although PE is a relatively irradiation sensitive polymer.The HRTEM images with a clear one-dimensional structure(reported) here were recorded in a transmission electron microscope(TEM) operated at 200 kV.The spacing(between) the fringes was found to be 0.37 nm,which is close to the d-spacing of(200) plane. Micrographs image were processed by using optical filtering methods to improve the signal-to-noise ratio.
