Sökning: "W O microemulsion"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden W O microemulsion.

  1. 1. NMR Self-Diffusion Studies and Stability Studies of Emulsions

    Författare :Ingrid Lönnqvist; LTH Ingenjörshögskolan vid Campus Helsingborg; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; coalescence; emulsion stability; size distribution; restricted diffusion; self-diffusion coefficient; self-diffusion PGSE NMR; surfactant; emulsifier; continuous phase; microemulsion; phase diagram; emulsion; multiple emulsion; cream; conductivity; Physics; Fysik; Chemistry; Kemi;

    Sammanfattning : The aim of this study is to characterize emulsion systems by self-diffusion PGSE NMR methods. The specifics of the emulsions studied are all taken from the literature and they are of the W/O or O/W type stabilized with different emulsifiers. LÄS MER

  3. 2. Lipid based formulations for topical application: characterization and delivery of active substances

    Författare :Johanna Bender; Chalmers tekniska högskola; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; bicontinuous cubic phase; phytantriol; passive diffusion; bicontinuous sponge phase; stratum corneum; W O microemulsion; monoolein; medium chain triglycerides;

    Sammanfattning : In this thesis, the interaction between lipids, solvents and active substances in lipid based formulations have been studied and related to formulation structure or release behavior on human skin or a model thereof. For the different investigations, isotropic equilibrium lipid phases, i.e. LÄS MER

  4. 3. Catalysis for Lean NOx Reduction - Aspects of Catalyst Synthesis and Surface Acidity

    Författare :Hanna Härelind Ingelsten; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lean NOx reduction; silica; alumina; FTIR; surface acidity; model catalysts; platinum; HZSM-5; w o microemulsion; aluminum-silicate; hydrocarbon;

    Sammanfattning : From both economic and environmental perspectives it is desirable to reduce the consumption of fossil fuels. One route to increase the fuel efficiency for vehicles is operation in oxygen excess. However, a major problem with this technique is the lean environment, which obstructs catalytic reduction of nitrogen oxides (NOx) to harmless nitrogen. LÄS MER

  5. 4. Platinum Nanoparticles Prepared in Water-in-Oil Microemulsions -Particle Formation, Support Interaction and Catalytic Activity

    Författare :Hanna Härelind Ingelsten; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; platinum; lean NO reduction; aluminium silicate; catalytic activity; silica; w o microemulsion; hydrocarbons; alumina; nanoparticle formation; catalyst preparation;

    Sammanfattning : .... LÄS MER

  7. 5. Formulation and characterization of W/O nano-dispersions for bioactive delivery applications

    Författare :Maria D. Chatzidaki; Aris Xenakis; Bert van Bavel; Werner Kunz; Örebro universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nano-dispersions; encapsulation; food; DLS; EPR; Cryo-TEM; SAXS; pH-stat; digestion; antioxidants; gastric lipase; pancreatic lipase; Kemi; Chemistry;

    Sammanfattning : The main objective of this study was the formulation of food-grade water-in-oil (W/O) nano-dispersions based mainly on medium or long-chain triglycerides. Two types of dispersions were formulated and structurally compared, namely emulsions and microemulsions. LÄS MER