Fluorocarbon surfactant/water mesomorphic phases. Part 3.—1H and 2H pulsed n.m.r. study of water in the lamellar phase of ammonium perfluoro-octanoate

1972 ◽  
Vol 68 (0) ◽  
pp. 653 ◽  
Author(s):  
G. J. T. Tiddy
Keyword(s):  
Lamellar Phase ◽  
Fluorocarbon Surfactant

scholarly journals Inclusion of Laponite nanoparticles in a lyotropic lamellar phase

2021 ◽  
Vol 47 (1) ◽  
pp. 49-59
Author(s):  
Girlane Castro Costa Leite ◽  
Gilson Carlos Castro Costa Leite
Keyword(s):  
Lamellar Phase

scholarly journals Exploring the in meso crystallization mechanism by characterizing the lipid mesophase microenvironment during the growth of single transmembrane α-helical peptide crystals

2016 ◽  
Vol 374 (2072) ◽  
pp. 20150125 ◽  
Author(s):  
Leonie van 't Hag ◽  
Konstantin Knoblich ◽  
Shane A. Seabrook ◽  
Nigel M. Kirby ◽  
Stephen T. Mudie ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Self Assembly ◽  
Lamellar Phase ◽  
Cubic Phase ◽  
Supporting Evidence ◽  
X Ray ◽  
X Ray Scattering ◽  
Standard Procedures ◽  
Helical Peptide ◽  
Saxs Analysis

The proposed mechanism for in meso crystallization of transmembrane proteins suggests that a protein or peptide is initially uniformly dispersed in the lipid self-assembly cubic phase but that crystals grow from a local lamellar phase, which acts as a conduit between the crystal and the bulk cubic phase. However, there is very limited experimental evidence for this theory. We have developed protocols to investigate the lipid mesophase microenvironment during crystal growth using standard procedures readily available in crystallography laboratories. This technique was used to characterize the microenvironment during crystal growth of the DAP12-TM peptide using synchrotron small angle X-ray scattering (SAXS) with a micro-sized X-ray beam. Crystal growth was found to occur from the gyroid cubic mesophase. For one in four crystals, a highly oriented local lamellar phase was observed, providing supporting evidence for the proposed mechanism for in meso crystallization. A new observation of this study was that we can differentiate diffraction peaks from crystals grown in meso , from peaks originating from the surrounding lipid matrix, potentially opening up the possibility of high-throughput SAXS analysis of in meso grown crystals. This article is part of the themed issue ‘Soft interfacial materials: from fundamentals to formulation’.

Noncentrosymmetric Lamellar Phase in ABCD Tetrablock Copolymers

2004 ◽  
Vol 37 (18) ◽  
pp. 7042-7050 ◽  
Author(s):  
Karim M. Jaffer ◽  
Robert A. Wickham ◽  
An-Chang Shi
Keyword(s):  
Lamellar Phase

scholarly journals Bending elastic properties of a block copolymer-rich lamellar phase doped by a surfactant: a neutron spin-echo study

Soft Matter ◽  
2014 ◽  
Vol 10 (36) ◽  
pp. 6926-6930 ◽  
Author(s):  
H. Egger ◽  
G. H. Findenegg ◽  
O. Holderer ◽  
R. Biehl ◽  
M. Monkenbusch ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Elastic Properties ◽  
Spin Echo ◽  
Lamellar Phase ◽  
Neutron Spin ◽  
Neutron Spin Echo

A Defective Lamellar Phase in a Nonionic Surfactant Water System Studied by NMR Methods

2003 ◽  
Vol 398 (1) ◽  
pp. 157-167 ◽  
Author(s):  
Luigi Coppola ◽  
Raffaella Gianferri ◽  
Isabella Nicotera ◽  
Cesare Oliviero
Keyword(s):  
Nonionic Surfactant ◽  
Water System ◽  
Lamellar Phase ◽  
Nmr Methods

p-Sulfonatocalix[4]arene-induced amphiphilic aggregation of fluorocarbon surfactant

2013 ◽  
Vol 57 (3) ◽  
pp. 371-378 ◽  
Author(s):  
Yu Cao ◽  
YiXuan Wang ◽  
DongSheng Guo ◽  
Yu Liu
Keyword(s):  
Fluorocarbon Surfactant
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