Sökning: "Mixed Micelles"

Visar resultat 21 - 25 av 26 avhandlingar innehållade orden Mixed Micelles.

1. 21. Catanionic Surfactant Mixtures and Binary Systems of Modified Fatty Acid Surfactants. Phase Equilibria and Structure

   Författare :Malin Bydén Sjöbom; Fysikalisk kemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; coacervation; asymmetry; bile salt; didodecyldimethylammonium bromide; Physical chemistry; Fysikalisk kemi; catanionic surfactant mixture; intermediate phase; a-methylsubstituted sodium carboxylate; dodecylpyridinium bromide; ionic surfactant; polarizing microscopy; FT-PGSE self-diffusion; 2H NMR; SAXS; liquid crystal; micelle; phase equilibria; phase diagram;

   Sammanfattning : Surfactant self-assembly is an important phenomenon that occurs in a number of processes in our everyday life. It is important to understand the forces and parameters that control and influence the self-assembly, as this knowledge can be used both in order to design surfactant systems with desired properties and for creating model systems, for example for biological processes. LÄS MER

3. 22. Formation of Block Copolymer and Surfactant Vesicles

   Författare :Karin Bryskhe; Fysikalisk kemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polymerteknik; Fysikalisk kemi; biopolymers; Polymer technology; nanoparticles; Lipid; triblock copolymer; surfactants; Nonionic; Vesicles; Formation; Physical chemistry;

   Sammanfattning : In this thesis temperature induced vesicle formation in both a block copolymer system and nonionic surfactant system have been investigated. The block copolymer is a triblock copolymer of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO), PEO-PPO-PEO, with the average molecular composition of EO5PO68EO5 and the commercial trade name Pluronic L121 (papers I, II). LÄS MER

4. 23. Phase Equilibria and Structures of Oppositely Charged Polymers and Surfactants in Water

   Författare :Anna Svensson; Fysikalisk kemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; self diffusion; PFG NMR; hexagonal; cubic Pm3n; liquid crystals; SAXS; polymer; counterion; complex; polyelectrolyte; surfactant; Monte Carlo simulations; Physical chemistry; Fysikalisk kemi;

   Sammanfattning : A new approach to the study of aqueous mixtures of oppositely charged polymers and surfactants has been introduced. Pure polyion-surfactant ion complex salts have been synthesized and used as the point of departure. The elimination of the simple ions reduces the number of components in the mixtures, thus greatly simplifying the system. LÄS MER

5. 24. Studies of sterol 12alpha-hydroxylase (CYP8B1) : distribution and role for cholesterol homeostasis and gallstone formation

   Författare :Jin Wang; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :CYP8B1; CY7P7A1; bile acid; cholesterol homeostasis; gallstone; nuclear receptor; cellular distribution; cholesterol hypersecretion; ABCG5 G8; SREBP2; cholesterol absorption; diabetes mellitus; anti-atherogenesis;

   Sammanfattning : Bile acids are essential physiological molecules which carry out multiple functions such as facilitating the absorption of dietary lipids and regulating the metabolism of cholesterol and bile acids. The formation of bile represents the major route for elimination of excess cholesterol, either by conversion of cholesterol into bile acids or excretion of intact cholesterol in mixed micelles. LÄS MER

7. 25. Lipid Self-Assembly and Lipase Action

   Författare :Johanna Borné; Fysikalisk kemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; specific activity.; Physical chemistry; Fysikalisk kemi; vesicles; cubosomes; liquid crystalline phases; sodium oleate; oleic acid; diolein; monoolein; Oleic acid based acyl glycerols; Thermomyces lanuginosa lipase;

   Sammanfattning : In this thesis the action of the Thermomyces lanuginosa lipase (TLL) on "real" substrates, that is, lipid aggregates - vesicles, micelles, emulsions, gels and liquid crystals is discussed. Even for a pure triolein, the system becomes quite complex as the lipolytic process starts, both in terms of structure and composition, involving 5 additional components - diolein (DO), monoolein (MO), oleic acid (OA), sodium oleate (NaO) and glycerol . LÄS MER