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Freeze-fracture transmission electron microscopy studies on the self-assemblies of amphiphilic solutions 被引量:1
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作者 郝京诚 黄建滨 +3 位作者 徐桂英 郑利强 刘维民 H.Hoffmann 《Science China Chemistry》 SCIE EI CAS 2003年第6期567-576,共10页
Self-assemblies of amphiphiles in solutions were investigated by using freeze-fracture transmission electron microscopy(FF-TEM). Especially, vesicles were characterized by FF-TEM and the transition of self-assemblies ... Self-assemblies of amphiphiles in solutions were investigated by using freeze-fracture transmission electron microscopy(FF-TEM). Especially, vesicles were characterized by FF-TEM and the transition of self-assemblies was determined. The stacked lamellar Lα-phase was prepared without shear forces by a chemical reaction. The stacked lamellar Lα-phase can be transformed into multilamellar vesicles by the shearing forces that occur when the stacked lamellar Lα-phase sample is turned upside down a few times. The multilamellar vesicles can also be transformed into unilamellar vesicles by high shearing forces. These transitions were demonstrated by FF-TEM measurements. Zn2+-induced vesicle formation in the single-chain surfactant solutions was first achieved. 展开更多
关键词 freeze-fracture transmission ELECTRON microscopy amphiphiles vesicles SHEAR force.
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Changes of macromolecular organizations in nonjunctional sarcolemmas after cross-innervation──a study offast-and slow-twitch muscle fibres in rats
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作者 LU JIANLI TIEFENG ZHANG +2 位作者 FUJIN QU BEIHUA QIAN SHIKAI HUANG(Shanghai Institute of Physiology, Chinesc Academy of Scicnces, 320 Yue-Yang Road, Shanghai 200031, China) 《Cell Research》 SCIE CAS CSCD 1995年第2期143-154,共12页
The purpose of the present study was to analyse the changes of macromolecular organizations in nonjunctional sarcolemmas of different types of skeletal muscle fibres after cross-innervation. In normal rats the mean de... The purpose of the present study was to analyse the changes of macromolecular organizations in nonjunctional sarcolemmas of different types of skeletal muscle fibres after cross-innervation. In normal rats the mean density of square arrays (6 nm particles organized in orthogonal arrays) was 9.02/μm2 for the nonjunctional sarcolemmas of fast-twitch extensor digitorum longus (control EDL,CE) nuscle fibres and 0.34/μm2 for the nonjunctional sarcolemmas of slow-twitch soleus (control SOL, CS) muscle fibres. After cross-innervation between the fast-twitch EDL and slow-twitch SOL muscle fibres by slow and fast muscle merves respectively for three months, the mean density was 0.45/μm2 for the nonjunetional sarcolemmas of the operated-EDL (OE) and 8.3/μm2 for the nonjunctional sarcolemmas of the operated SOL (OS). This indicates that the cross-innervation causes a reciprocal transformation of the number and distribution of such macromolecular organizations in the electrically excitable nonjunctional sarcolemmas. 展开更多
关键词 SARCOLEMMA square array cross-innervation freeze-fracturing rat(Wistar)
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Phase behavior and structure analysis of the middle mixed layer for ASP flooding system at low surfactant concentration 被引量:1
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作者 牟建海 李干佐 +2 位作者 廖广志 黄丽 赵孔双 《Science China Chemistry》 SCIE EI CAS 2002年第2期184-190,共7页
The phase behavior and interfacial tension of alkali/surfactant/polymer (ASP) flooding system and simulative crude oil were investigated, and the size distribution and structure analysis of the middle mixed layer (MML... The phase behavior and interfacial tension of alkali/surfactant/polymer (ASP) flooding system and simulative crude oil were investigated, and the size distribution and structure analysis of the middle mixed layer (MML) were also studied by size analyzer and freeze-fracture TEM. It was found that there were some rules between the volume of MML and the concentration of each component, and the interfacial tension between MML and the oil phase or water phase could reach an ultra-low value. Especially, the freeze-fracture TEM micrographs of MML were firstly obtained, and the new viewpoint was put forward that there coexist the structures of micelle, microemulsions and emulsions in MML and the structure of microemulsion is dominant. This would make an important effect on the research of surfactant theory and ASP flooding mechanism. 展开更多
关键词 ASP FLOODING system phase behavior microemulsion emulsion freeze-fracture TEM.
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