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 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’.

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

Two Types of Lamellar Phase in TTAB/Water/Pentanol System as Detected by Positron Lifetime Spectroscopy

2004 ◽  
Vol 445-446 ◽  
pp. 316-318
Author(s):  
P.H. Khani ◽  
R. Yadav ◽  
K. Chandramani Singh ◽  
P.C. Jain
Keyword(s):  
Positron Lifetime ◽  
Lamellar Phase ◽  
Positron Lifetime Spectroscopy

Dopant-Mediated Interactions in a Lecithin Lamellar Phase

2008 ◽  
Vol 29 (7) ◽  
pp. 985-990 ◽  
Author(s):  
Luyan Wang ◽  
Xiao Chen ◽  
Zhenwen Sun ◽  
Yongcun Chai ◽  
Jingcheng Hao ◽  
...  
Keyword(s):  
Lamellar Phase

Shear-induced structural transition in a lyotropic lamellar phase studied using small angle neutron and light scattering

2005 ◽  
Vol 17 (31) ◽  
pp. S2923-S2928 ◽  
Author(s):  
T Kato ◽  
K Miyazaki ◽  
Y Kawabata ◽  
S Komura ◽  
M Fujii ◽  
...  
Keyword(s):  
Light Scattering ◽  
Small Angle ◽  
Structural Transition ◽  
Lamellar Phase

Macroscopic dynamics near the isotropic micellar to lamellar phase transition

2014 ◽  
Vol 430 ◽  
pp. 56-61
Author(s):  
Prabir K. Mukherjee
Keyword(s):  
Phase Transition ◽  
Lamellar Phase

Scattering Under Shear: Alignment of a Disordered Bicontinuous Mesophase

2011 ◽  
Vol 1355 ◽  
Author(s):  
Annela M. Seddon ◽  
Gudrun Lötze ◽  
Tomás Plivelic ◽  
Adam M. Squires
Keyword(s):  
Liquid Phase ◽  
Nanostructured Materials ◽  
Protein Crystallization ◽  
Lamellar Phase ◽  
Cubic Phase ◽  
Biological Models ◽  
Two Phase ◽  
Shear Alignment ◽  
Disordered Phase ◽  
Additional Water

ABSTRACTIn this work we demonstrate that the application of shear to a disordered lyoptropic liquid phase formed by a biological lipid, monoolein formed in water and butanediol results in the formation of an aligned lamellar phase. Furthermore we show that if shear is applied to this disordered phase in the presence of additional water, an highly oriented inverse bicontinous cubic phase is created. We suggest that these two phase may have applications as biological models, as templates for nanostructured materials and in improved protein crystallization techniques.

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