نتایج جستجو برای: mesophase

تعداد نتایج: 751  

2007
R. J. Baldwin T. Kreouzis

Polymerizable liquid crystalline semiconductors, referred to as reactive mesogens RMs , consist of -conjugated cores with reactive end groups decoupled by an aliphatic spacer. These can be polymerized within the mesophase, maintaining the self-assembled morphology and charge transport characteristics. The polymerized films can then be used in organic electronic applications such as charge trans...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2015
Elif B Olutaş Fadime M Balcı Ömer Dag

Lyotropic liquid-crystalline (LLC) materials are important in designing porous materials, and acids are as important in chemical synthesis. Combining these two important concepts will be highly beneficial to chemistry and material science. In this work, we show that a strong acid can be used as a solvent for the assembly of nonionic surfactants into various mesophases. Sulfuric acid (SA), 10-la...

Journal: :Crystal growth & design 2011
Dianfan Li Jean Lee Martin Caffrey

The default lipid for the bulk of the crystallogenesis studies performed to date using the cubic mesophase method is monoolein. There is no good reason however, why this 18-carbon, cis-monounsaturated monoacylglycerol should be the preferred lipid for all target membrane proteins. The latter come from an array of biomembrane types with varying properties that include hydrophobic thickness, intr...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Dianfan Li Martin Caffrey

The lipidic cubic mesophase has been used to crystallize important membrane proteins for high-resolution structure determination. To date, however, no integral membrane enzymes have yielded to this method, the in meso. For a crystal structure to be meaningful the target protein must be functional. Using the in meso method with a membrane enzyme requires that the protein is active in the mesopha...

Journal: :Biochemical Society transactions 2011
Martin Caffrey

The lipidic cubic phase method for crystallizing membrane proteins has posted some high-profile successes recently. This is especially true in the area of G-protein-coupled receptors, with six new crystallographic structures emerging in the last 3½ years. Slowly, it is becoming an accepted method with a proven record and convincing generality. However, it is not a method that is used in every m...

Journal: :Soft matter 2015
Jennifer M Bulpett Tim Snow Benoit Quignon Charlotte M Beddoes T-Y D Tang Stephen Mann Olga Shebanova Claire L Pizzey Nicholas J Terrill Sean A Davis Wuge H Briscoe

This study focuses on how the mesophase transition behaviour of the phospholipid dioleoyl phosphatidylethanolamine (DOPE) is altered by the presence of 10 nm hydrophobic and 14 nm hydrophilic silica nanoparticles (NPs) at different concentrations. The lamellar to inverted hexagonal phase transition (Lα-HII) of phospholipids is energetically analogous to the membrane fusion process, therefore un...

Journal: :Soft matter 2015
Manoj Kumar Naganath G Patil Chandan Kumar Choudhury Sudip Roy Ashootosh V Ambade Guruswamy Kumaraswamy

The role of molecular interactions in governing lipid mesophase organization is of fundamental interest and has technological implications. Herein, we describe an unusual pathway for monoolein/water reorganization from a bicontinuous mesophase to a discontinuous reverse micellar assembly, directed by the inclusion of polar macromolecules. This pathway is very different from those reported earli...

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