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Showing 1 to 20 of 25 for “"Amphiphilic molecules"”.
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Simulation Studies Of Self-assembly And Phase Diagram Of Amphiphilic Molecules
… structures and the phase diagram of amphiphilic molecules of diverse geometric shapes using a number of different computer simulation methods. The semi-realistic coarse-grained model, used extensively for simulation of polymers and surfactant molecules, is adopted in an off-lattice …
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Sugar-Derived Oleogels in Cosmetics and Food Applications: a Case Study of Trehalose- and Mannitol-Based Gelators
… food, medicine, cosmetics and other industries. Amphiphilic molecules have been shown to act as low molecular weight gelators (LMWGs) and are becoming the main focus of several research groups. Their ability to self-assemble into various morphologies from micelles to bilayer sheets, and remain …
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Analysis of Hopanoids From Three Psychrophilic Marine Bacterial Strains
… with the plasma membrane of some bacteria. These amphiphilic molecules, which share structural similarities with sterols, are believed to regulate the thermodynamic and mechanical properties of phospholipid packing in the cell membranes of some prokaryotes. Three psychrophilic bacterial strains …
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Synthesis of guanidinium-functionalized amphiphiles for the exploration of chaotropic supramolecular nanoribbons
… Supramolecular self-assemblies comprised of amphiphilic molecules have been engineered to achieve diverse applications, from drug delivery to 3D printing. The design of the component molecules in engineered assemblies are often bio-inspired, where structures are highly dynamic to respond to …
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A Mesoscale Dynamics study of the phases in surfactant-water ternary systems
… developed to investigate the ability of small molecules to control phase structures in non-ionic surfactant-water systems. The ability to control phase structure has positive implications for potential templating applications which require ordered and stable phases with high surface curvature. …
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Self-assembly of aurfactant-like amphiphilic peptides made of natural amino acids
… acid gel electrophoresis to new fluorescent molecules for microscopy. Invention of new tools is necessary for future solutions to biological problems. One such important problem is the study of membrane proteins, most of which are not amenable to biochemical or structural studies due to their …
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Lattice models of amphiphile and solvent mixtures.
Materials based on amphiphilic molecules have a wide range of industrial applications and are of fundamental importance in the structure of many biological systems. Their importance derives from their behaviour as surface-active agents in solubilization applications and because of their ability to …
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Differential Interactions of Lipopolysaccharides with Lipid Bilayers: Applications for Pathogen Detection
… methods for the discriminative detection of amphiphilic lipopolysaccharide (LPS) antigens, so as to improve screening methodologies for food-safety applications, and detection of amphiphiles in general. LPS is associated with the outer membrane of Gram-negative bacteria, and is a primary …
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Crystalline frameworks self-assembled from amphiphilic DNA nanostructures
… reliant primarily on overall topology of the molecules rather than their exact chemical and geometrical features. Although the mechanism underlying amphiphile self-assembly is robust, it inherently limits control over the fine-scale structural details. This thesis reports on a new class of …
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Synthesis and Characterization of Polyhedral Oligomeric Silsesquioxane (POSS) Based Amphiphiles
… have shown that trisilanol-POSS derivatives are amphiphilic and form uniform Langmuir films, whereas closed-cage POSS derivatives are hydrophobic and aggregate. In previous work, a triester (POSS-triester) and a triacid (POSS-triacid) were synthesized from PSS-(3-hydroxypropyl)-heptaisobutyl …
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Surface Characterization of Siloxane, Silsesquioxane, and Maleic Anhydride Containing Polymers at Air/Liquid Interfaces
… interface (A/W) can be achieved by spreading amphiphilic molecules on a liquid subphase and compressing them into an ordered arrangement. The use of the Langmuir-Blodgett technique (LB) to prepare ultra thin films on solid surfaces from monolayers at A/W has considerable utility for studying …
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Topical Clear Aqueous Nanomicellar Formulations For Anterior And Posterior Ocular Drug Delivery
… of polymeric micelles and solubilized. Polymeric amphiphilic molecules (e.g., hydrogenated castor oil – 40 (HCO-40) and Vit. E TPGS) are known to generate nanomicellar constructs with hydrophobic core and hydrophilic corona. However, constructs prepared from a single polymer are unstable and …
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Order in Thin Films of Diblock Copolymers by Supramolecular Assembly
… (PS-PVP) were associated with the molecules of two different low molar mass additives, 2-(4'-hydroxybenzeneazo)benzoic acid (HABA) and 3-n-pentadecyl phenol (PDP), via hydrogen bonds. The choice of an additive and a solvent is a key factor which influences the morphologies of the …
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Molecular Rationale Behind the Differential Substrate Specificity of Homologous RND Transporters in E. coli and P. aeruginosa
… range of substrates ranging from lipophilic to amphiphilic molecules. Despite a comparable overall sequence homology among these RND transporters of E. coli and P. aeruginosa, they exhibit varied substrate specificity, the underlying basis of which still remains elusive. In an attempt to provide …
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From interfacial nanostructures to advanced constructs: harnessing surfactant self-assembly at liquid interfaces
… as inorganic (silica) nanoparticles and small amphiphilic molecules, lays the foundation for future advancements in soft material fabrication. The precise control over liquid-phase architectures and their tailored mechanical properties, as well as structural ordering at various scales, offers …
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Phase and Rheological Behavior of Langmuir Films at the Air/Water Interface: Polyhederal Oligomeric Silsesquioxanes (POSS), POSS/Polymer Blends, and Magnetic Nanoparticles
… for studying the conformation and ordering of amphiphilic molecules at the air/water (A/W) interface. With the equipment of Wilhelmy plate technique, Brewster angle microscopy (BAM), and surface light scattering (SLS), the interfacial phase and rheological behavior of Langmuir films can be …
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Insights into asphaltene stability, aggregation, deposition and molecular structure
… to the crude oil, and the influence of amphiphilic molecules on asphaltene stabilisation was also illustrated. It is shown that the current techniques that are employed to select the most appropriate asphaltene inhibitor based on their efficiency should be revisited to provide a better …
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Sustainable treatment of oil contaminated waste: oil-based mud (OBM) drill cuttings and soil.
… produced from biological origin. They are amphiphilic molecules, consisting of hydrophilic and hydrophobic moieties. The major advantage biosurfactants have over their synthetic counterpart is that they have low toxicity and are biodegradable. They can be produced from natural and renewable …
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Static and dynamic properties of soluble surfactants at the air/water interface
Amphiphilic molecules contain a hydrophilic headgroup and a hydrophobic tail. The headgroup is polar or ionic and likes water, the tail is typically an aliphatic chain that cannot be accommodated in a polar environment. The prevailing molecular asymmetry leads to a spontaneous adsorption of …
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