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Download Structure and Stability of Liposomes: Interactions With Micelle-Forming Surfactants (Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science Technology) ePub

by Mats Silvander

Download Structure and Stability of Liposomes: Interactions With Micelle-Forming Surfactants (Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science  Technology) ePub
  • ISBN 9155444733
  • ISBN13 978-9155444730
  • Language English
  • Author Mats Silvander
  • Publisher Uppsala Universitet (December 1, 1999)
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  • Category Different
  • Subcategory Science and Mathematics
  • Size ePub 1460 kb
  • Size Fb2 1996 kb
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University dissertation from Uppsala : Acta Universitatis Upsaliensis.

Structure and stability of liposomes : Interactions with micelle- forming surfactants. University dissertation from Uppsala : Acta Universitatis Upsaliensis. Author : Mats Silvander; Uppsala universitet. Abstract : The stability of phospholipid lipomes interacting with micelle-forming surfactants was studied under physiological conditions (150 mM NaCl and pH 7. 4 unless otherwise stated) mainly by use of cryo-TEM and fluorescence.

University dissertation from Uppsala : Acta Universitatis Upsaliensis.

Dissertation: Structure and stability of liposomes : Interactions with micelle- forming surfactants. Micelles were formed at high pH when the fatty acid was deprotonated, while dispersed inverted structures were formed at lower p. lkyl sulphates with a hydrocarbon chain length of 12 or 14 carbons induced formation of defect (or holey) lamellar liposomes as intermediate structures when added to sonicated liposomes of egg-lecithin in 150 mM NaCl. The shorter C10SO4- surfactant instead formed cylindrical micelles as intermediates. Abstract : The use of catanionic drug-surfactant mixtures was proven to be an efficient novel method of obtaining prolonged drug release from gels. It was shown that various commonly used drug compounds are able to form catanionic mixtures together with oppositely charged surfactants. Keywords : Naturvetenskap; Natural Sciences; Physics; Fysik; Natural Sciences Physics; Naturvetenskap Fysik; Physical Chemistry; fysikalisk kemi; Abstract : The stability of phospholipid lipomes interacting with micelle-forming surfactants was studied under physiological conditions (150 mM NaCl and pH 7.

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oceedings{S, title {Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1668 Mesoscale Processes over the Baltic Sea}, author {Nina Svensson}, year {2018} }. Nina Svensson. Mesoscale Processes over the Baltic Sea. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1668. 54 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-513-0331-4.

In summary, the results in my thesis indicate that the speciation p. oceedings{Liu2018DigitalCS, title {Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1699 Mechanisms of speciation in Silene}, author {Xiaodong Liu}, year {2018} }. Xiaodong Liu. Published 2018. Mechanisms of speciation in Silene. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1699. 42 pp. ISBN 978-91-513-0398-7.

Only recently, joint X-ray, light and neutron scattering experiments have demonstrated that aggregates and bulk pseudo-phases coexist in presumably normal solutions, in which a water insoluble component is solubilized in a certain domain of concentration of a hydrotrope component like ethanol. Nevertheless, nothing is known about the molecular-level shape and structure of such aggregates.

Structure of Micelle. Micelles are formed by the aggregation of amphipathic molecules in polar solvents, like water. These molecules are so arranged that they exclude any water molecules from the center. They are usually in the form of a sphere, sometimes they are in an ellipsoidal or cylindrical form; with the polar heads on the outside and the non polar tails on the inside. Here, the molecules orient themselves in such a way that the hydrophilic heads of the molecule are in close contact with the polar medium (water); whereas, their hydrophobic regions are away from it. Unlike lipid bilayers, micelles are usually composed of only a single layer of molecules.

Start studying Surfactants and micelles. Structure forming . membrane, microemulsions, micelles, liquid crystals, liposomes, vesicles or gel. Learn vocabulary, terms and more with flashcards, games and other study tools. Define amphipathy and surfactants and list some of the main surfactants (LO1) Explain the formation of micelles, their use and define the critical micelle concentration (LO2) Demonstrate awareness of the role of surfactants in pharmaceutical formulations (LO3) Define liposomes and their use in pharmaceutical formulations (LO4). What are Amphipathic molecules and give some examples.

The interpretation indicated the vesicles to be formed by monomolecular buildup for surfactant concentrations less than 5%, while for vesicles formed at greater concentrations an agglomeration of vesicle fractions appeared more reasonable. Liquid crystals microemulsions stop-flow process surfactant association structures vesicles.

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