Organic molecular sieve membranes for chemical separations

2021 ◽  
Author(s):  
Hongjian Wang ◽  
Meidi Wang ◽  
Xu Liang ◽  
Jinqiu Yuan ◽  
Hao Yang ◽  
...  
Keyword(s):  
Molecular Sieve ◽  
Process Intensification ◽  
Efficient Process ◽  
Chemical Separations ◽  
Guiding Principles

This review proposes the concept of organic molecular sieve membranes (OMSMs) and the guiding principles for the precise structure construction and efficient process intensification of OMSMs.

Research Progress of High Gravity Technology and its Application Prospect in Metallurgical Extraction Reaction

2014 ◽  
Vol 968 ◽  
pp. 163-167
Author(s):  
Yi Du ◽  
Jia Man Ding ◽  
Jin Hui Peng
Keyword(s):  
Process Intensification ◽  
Liquid Extraction ◽  
Research Progress ◽  
High Gravity ◽  
Engineering Applications ◽  
Basic Principles ◽  
Efficient Process ◽  
Metallurgy Industry ◽  
Application Prospects ◽  
Chemical Materials

High gravity technology is an efficient process intensification technology. Its applications in the chemical, materials and other industries have been relatively mature. The basic principles, characteristics and development of this technology are firstly summarized in this paper. And then, its basic theory researches and engineering applications are comprehensively analyzed. Finally, aiming at the liquid extraction problems in metallurgy industry, the application prospects and problems to be solved were put forward.

Polymorphic phase transition of a membrane protein - analysis of continuous diffuse electron diffraction intensity

1986 ◽  
Vol 44 ◽  
pp. 166-167
Author(s):  
Douglas L. Dorset ◽  
Andrew K. Massalski
Keyword(s):  
Molecular Sieve ◽  
Three Dimensional ◽  
Pore Geometry ◽  
Two Dimensional ◽  
Diffraction Intensity ◽  
Polymorphic Phase Transition ◽  
E Coli ◽  
Crystallographic Study ◽  
Hexagonal Form ◽  
Polymorphic Forms

Matrix porin, the ompF gene product of E. coli, has been the object of a electron crystallographic study of its pore geometry in an attempt to understand its function as a membrane molecular sieve. Three polymorphic forms have been found for two-dimensional crystals reconstituted in phospholipid, two hexagonal forms with different lipid content and an orthorhombic form coexisting with and similar to the hexagonal form found after lipid loss. In projection these have been shown to retain the same three-fold pore triplet geometry and analyses of three-dimensional data reveal that the small hexagonal and orthorhombic polymorphs have similar structure as well as unit cell spacings.

Fibrillin molecules aggregate to form an extendible beaded structure which is a major component of “Elastin Associated” microfibrils

1989 ◽  
Vol 47 ◽  
pp. 246-247
Author(s):  
Douglas R. Keene ◽  
B. Kerry Maddox ◽  
Marie B. Spurgin ◽  
Lynn Y. Sakai ◽  
Robert W. Glanville
Keyword(s):  
Molecular Sieve ◽  
Room Temperature ◽  
Culture Medium ◽  
Weight Fraction ◽  
Ammonium Bicarbonate ◽  
High Molecular Weight Fraction ◽  
Bicarbonate Buffer ◽  
Human Amnion ◽  
Gold Conjugate ◽  
Ammonium Bicarbonate Buffer

A mouse monoclonal antibody was used to identify beaded aggregates found in guanidine extracts of human amnion as assemblies of fibrillin molecules. These aggregates were also shown to be a major component of extracellular matrix microfibrils. We further demonstrated that the periodicity of these aggregates can be increased when subjected to mechanical stress.Human amnion was extracted with guanidine and the extracted material purified using ion exchange and molecular sieve chromatography. A high molecular weight fraction was precipitated by dialyzing against dilute acetic acid. Part of the precipitate was suspended in 0.2 M ammonium bicarbonate buffer and rotary shadowed. A second portion was resuspended in culture medium containing antibody which recognizes matrix microfibrils, diluted 1:5 in ammonium bicarbonate and reacted for 120 minutes at room temperature. Antibody labeled precipitate was washed by repeated pelleting and resuspension in buffer and then incubated in Janssen GAM 5 nm gold conjugate for 60 minutes at room temperature.

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