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Showing 1 to 20 of 317 for “"Micelles"”.
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Protein extraction using reverse micelles
Reverse micelles are self-organized aggregates formed by a surfactant in a non-polar solvent or oil. The presence of a water pool in the polar core of reverse micelles is of considerable advantage in protein extraction. A lot of researches have been done with ionic reverse micelles applied in …
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Amyloid Fibril Nucleation In Reverse Micelles
… Abeta to adopt fibril-like structure in reverse micelles may reveal what causes amyloid fibrils to form in Alzheimer's disease. Molecular dynamics simulations of Abeta in reverse micelles have been performed to identify and understand these factors. Results indicate that Abeta side chains …
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Nonlinear rheology of micelles and polymers
… best-studied examples are wormlike surfactant micelles. A model for these systems has recently been proposed, based on the concept of a confining 'tube', and leading to a constitutive equation related to that of Doi and Edwards for unbreakable chains. This equation is capable of describing …
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La thermodynamique de la formation des micelles cationiques
… aider à élucider le problème de la formation de micelles en milieu aqueux à 25°c. En utilisant deux surfactants cationiques, les bromures de nonyl- et de décyl-triméthylannnonium, nous avons mesuré des volumes, des capacités calorifiques et des enthalpies molaires apparentes au moyen d'un …
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Selective extraction of colorful proteins using reverse micelles
… method of liquid-liquid extraction using reverse micelles is one such technique. While this technique has been researched in the past, previous studies lack information about realistic complex protein mixtures.</p> <p>Through this study optimum conditions were found for the individual extraction …
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Effect of micelles on flotation of metal ions
… of aggregation of the surfactant molecules into micelles, and the effect of the divalent metal counterion concentration on this aggregation and on the critical concentration at which micelles start forming (cmc). This was accomplished using well established light scattering and surface tension …
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Characterization of polystyrene-block-poly (acrylic acid) micelles
… the formation, size and spatial distribution of micelles of poly(styrene-block-acrylic acid) (PS-b-PAA) in organic solvents or assembled on solid substrates have been investigated. The micelles were characterized in the solvated state using Dynamic Light Scattering, and were imaged and …
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Design and characterization of multicompartment micelles in aqueous solution
… for one block results mostly in the formation of micelles. The micellar structure of diblock copolymers is inherently limited to a homogeneous core surrounded by a corona, which keeps the micelle in solution. Thus, for drug-delivery applications, such structures only offer a single domain (the …
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K-casein and its Interaction in Human Milk Micelles
… without the labeled K-casein tracer. After the micelles were fractionated by ultracentrifugation into sized pellets, the mole ratio of K/p-casein was determined by reverse phase HPLC and the six forms of phosphorylated p-casein were quantitated by anion exchange HPLC. In all systems, the …
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Understanding self-assembly and flow heterogeneities in poloxamer wormlike micelles
Wormlike micelles (WLMs) are elongated, self-assembled structures formed from amphiphilic molecules in solution. Although the structure of WLMs resembles that of polymers, WLMs are differentiated by their ability to break and recombine at rest and in response to deformations. This unique property …
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The extraction of Cytochrome C and DsRed2 into reverse micelles
… DsRed2 were successfully extracted into reverse micelles by the contacting of an aqueous protein-containing phase with an organic phase. Two important properties that differentiate the extraction profiles of these proteins are pI and size. Cytochrome c is a relatively small, monomeric protein …
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Crystalline-core micelles based on triblock terpolymers with polyethylene middle blocks
… worm-like crystalline-core micelles (wCCMs). Obtaining profound knowledge of the parameters controlling the self-assembly process allowed the production of a variety of complex one-dimensional micellar architectures with many potential applications, such as adaptive …
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ABC terpolymers : micelles, polymersomes and stabilisation of water in water emulsions
Polymersomes are vesicles formed from block copolymers. Their large internal volumes and thick walls make them very attractive for the encapsulation of different species. However, a major issue which prevents the use of polymersomes in most of the applications is that the encapsulation efficiency …
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Ultrafast Vibrational Dynamics of Water and Confined Water in Reverse Micelles
… across the surfactant layer of AOT reverse micelles has been measured in small AOT reverse micelles (AOT/water/CCl 4). Most of the vibrational energy from nanodroplet water is transferred to the AOT head group and then out to the CCl4 within 10 picoseconds. The vibrational relaxation of …
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Quantitative Model for the Prediction of Hydrodynamic Size of Nonionic Reverse Micelles
The sizes of nonionic reverse micelles were investigated as a function of the molecular structure of the surfactant, the type of oil, the total concentration of surfactant [NP], the ratio of NP4 to total surfactant (r), the water to surfactant molar ratio (ω), temperature, salt concentration, and …
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Self-assembly of cross-linked polymer micelles into complex higher-order aggregates
… The formation of poly-2-oxazoline based micelles in aqueous solution and their simultaneous functionalization and cross-linking using thiol-yne chemistry is e.g. presented. By introducing pH responsive thiols in the core of the micelles the influence of charged groups in the core of …
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EGFR-Targeted Polymeric Micelles For Targeted Pc 4-PDT Of Oropharyngeal Tumors
… of Pc 4 in biocompatible block-copolymer micelles, (2) Modify micelle surface with EGFR-specific ligands and investigate cancer cell targeting of the surface-modified micelles in vitro, and, (3) Investigate targeted PDT effects on SCC cell lines in vitro and suitable animal models in vivo …
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Design of Functional Polymeric Micelles as a Carrier for Anticancer Drug Delivery
… should be considered in the design of polymeric micelles are kinetic stability and drug loading capacity. In this thesis, we investigate the use of polymeric micelles self-assembled from biodegradable and amphiphilic polycarbonate-based copolymers bearing pendent functionalities for anti-cancer …
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Stabilization of transition states of organic reactions by cyclodextrins, micelles, and dendrimers
Micelles of cetyltrimethylammonium bromide (CTAB) catalyze the basic cleavage of p-nitrophenyl alkanoates, whereas micelles of sodium dodecyl sulphate (SDS) inhibit this reaction. The strength of binding of the esters to both CTAB and SDS shows the same linear dependence and sensitivity to the acyl …
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Caseins micelles crosslinked with transglutaminase: foaming properties as a function of pH
… that are organized m structures called casei micelles (CMs). The foam properties of casei micelles are closely related to their structure, which 1s influenced by several factors, including pH variations. In this context, enzymatic crosslinking with transglutaminase (Tgase) can increase the …
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