聚焦离子束连续切片扫描电镜(focused ion beam serial block face scanning electron microscopy,FIB-SEM)技术,目前已被广泛应用于小体积细胞或组织样品的三维重构,具有自动化程度高、Z轴分辨高等优点。本文从包埋块样品准备与处理、...聚焦离子束连续切片扫描电镜(focused ion beam serial block face scanning electron microscopy,FIB-SEM)技术,目前已被广泛应用于小体积细胞或组织样品的三维重构,具有自动化程度高、Z轴分辨高等优点。本文从包埋块样品准备与处理、样品区域选定、软件设置前准备、软件参数(离子束加工和电子束扫描)设置、软件运行与图像采集和图像处理等多个方面,详细介绍应用FIB-SEM技术对常温生物包埋块样品进行三维重构的流程和细节,并对某些关键性参数展开讨论。展开更多
A novel micro-micro-mesoporous aluminosilicate LS-BFMZ （low-silica-BEA（beta）-faujasite （Y）-mesoporous） composite zeolite with the MCM-41 type structure was synthesized through a novel process involving the self-...A novel micro-micro-mesoporous aluminosilicate LS-BFMZ （low-silica-BEA（beta）-faujasite （Y）-mesoporous） composite zeolite with the MCM-41 type structure was synthesized through a novel process involving the self- assembly of CTAB surfactant micellae with silica-alumina source originated from alkaline treatment of the beta zeolite. The physical properties of the LS-BFMZ composite zeolite were characterized using various techniques, including XRD, IR and SEM techniques. Meanwhile, a possible mechanism regarding the formation of the LS-BFMZ composite zeolite was proposed.展开更多
Hydrothermal liquefaction of wheat straw in sub-critical water with ionic liquid was investigated in an autoclave. The product distribution at different temperatures and pressures was studied. The liquid oil and the r...Hydrothermal liquefaction of wheat straw in sub-critical water with ionic liquid was investigated in an autoclave. The product distribution at different temperatures and pressures was studied. The liquid oil and the residuals were tested by 1H NMR, FTIR and SEM techniques. The results indicated that under the same conditions, the oil yield from liquefaction of wheat straw in water/ethanol was higher than that in sub-critical water. The result also showed that under the investigated conditions, adding 1-butyl-3-methylimidazolium chloride([Bmim]Cl) could increase the total conversion and gas yield, while at the same time the yield of n-hexane insoluble fraction and the tetrahydrofuran soluble fraction was reduced. Moreover, the results also showed that upon adding [Bmim]Cl the contents of the aliphatic hydrogen and phenols in liquid oil also increased along with improved oil quality.展开更多
文摘聚焦离子束连续切片扫描电镜(focused ion beam serial block face scanning electron microscopy,FIB-SEM)技术,目前已被广泛应用于小体积细胞或组织样品的三维重构,具有自动化程度高、Z轴分辨高等优点。本文从包埋块样品准备与处理、样品区域选定、软件设置前准备、软件参数(离子束加工和电子束扫描)设置、软件运行与图像采集和图像处理等多个方面,详细介绍应用FIB-SEM技术对常温生物包埋块样品进行三维重构的流程和细节,并对某些关键性参数展开讨论。
基金supported by the 973 plan item under Grants(2003CB615802)
文摘A novel micro-micro-mesoporous aluminosilicate LS-BFMZ （low-silica-BEA（beta）-faujasite （Y）-mesoporous） composite zeolite with the MCM-41 type structure was synthesized through a novel process involving the self- assembly of CTAB surfactant micellae with silica-alumina source originated from alkaline treatment of the beta zeolite. The physical properties of the LS-BFMZ composite zeolite were characterized using various techniques, including XRD, IR and SEM techniques. Meanwhile, a possible mechanism regarding the formation of the LS-BFMZ composite zeolite was proposed.
基金the Research Fund for the Doctoral Program of Higher Education for new teachers of China(20091404120002)the Shanxi Province Science Foundation for Youths of China(2011021008-1)the Soft Science Program of Shanxi Province(2011041015-01)
文摘Hydrothermal liquefaction of wheat straw in sub-critical water with ionic liquid was investigated in an autoclave. The product distribution at different temperatures and pressures was studied. The liquid oil and the residuals were tested by 1H NMR, FTIR and SEM techniques. The results indicated that under the same conditions, the oil yield from liquefaction of wheat straw in water/ethanol was higher than that in sub-critical water. The result also showed that under the investigated conditions, adding 1-butyl-3-methylimidazolium chloride([Bmim]Cl) could increase the total conversion and gas yield, while at the same time the yield of n-hexane insoluble fraction and the tetrahydrofuran soluble fraction was reduced. Moreover, the results also showed that upon adding [Bmim]Cl the contents of the aliphatic hydrogen and phenols in liquid oil also increased along with improved oil quality.
