Sökning: "Permeability"

Visar resultat 16 - 20 av 650 avhandlingar innehållade ordet Permeability.

  1. 16. Mass-Transport through Interfaces

    Författare :Sofie Gårdebjer; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; poly 3-hydroxybutyrate ; permeability; diffusion cells; poly lactide-co-glycolide acid ; mass-transport; polyethylene; poly lactic acid ; ethylene acrylic acid; interfaces; cellulose;

    Sammanfattning : Many of the products in our daily life consist of layered structures, where packaging materials and wound care products can be mentioned as examples. These structures often consist of different kind of polymeric materials and between these materials interfaces are formed. LÄS MER

  3. 17. Permeability of non-crimp fabrics : a computational fluid dynamics approach

    Författare :Markus Nordlund; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Sammanfattning : In the present market for manufacturing of high performance structural parts for various applications such as aerospace, transportation, infrastructure, marine, sports and recreation, low weight, high performance composites are preferable. Non-Crimp Fabrics (NCFs) are often used for such applications due to its high mechanical properties and often cost effective production. LÄS MER

  4. 18. Epithelial barrier dysfunction in ileal Crohn's disease

    Författare :Johan Dabrosin-Söderholm; Svante Nordgren; Linköpings universitet; []
    Nyckelord :acetylsalicylic add; confocal microscopy; Crohn s disease; cytoskeleton; electron microscopy; genetics; human; ileum; inflammatory bowel disease; intestinal absorption; intestinal mucosa; macromolecules; mitochondria; ovalbumin; permeability; sodium caprate; tight junctions; transcytosis; uncoupling agents; Ussing chamber; MEDICINE; MEDICIN;

    Sammanfattning : The study aimed at investigating the intestinal barrier in Crohn's disease, with special reference to epithelial responses to luminal stimuli, and to permeation of proteins.Ileal mucosa from patients undergoing intestinal resection was studied in vitro in Ussing chambers. LÄS MER

  5. 19. Non-digestible Polysaccharides and Intestinal Barrier Function : specific focus on its efficacy in elderly and patients with Crohn’s disease

    Författare :John-Peter Ganda Mall; Robert Jan Brummer; Ida Schoultz; Åsa Keita; Mikael Wirén; Örebro universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Non-digestible polysachharides; beta-glucan; arabinoxylan; barrier function; permeability; Ussing chamber; elderly; Crohn’s disease;

    Sammanfattning : A large number of elderly suffer from gastrointestinal (GI) symptoms such as constipation and diarrhoea. The underlying mechanisms of age-acquired GI symptoms are not well studied but are necessary to clarify in order to recommend the right treatment. LÄS MER

  7. 20. Skin hydration - How water and osmolytes influence biophysical properties of stratum corneum

    Författare :Sebastian Björklund; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Stratum corneum; diffusive transport; permeability; flow-through cell; Franz cell; transdermal drug delivery; water activity; vapor pressure; osmotic gradient; relative humidity; ceramide; free fatty acid; cholesterol; keratin filaments; natural moisturizing factor NMF ; urea; glycerol; molecular mobility; 13C natural-abundance solid-state NMR; polarization transfer; isothermal calorimetry; impedance spectroscopy; X-ray diffraction;

    Sammanfattning : The outermost layer of skin (i.e., the stratum corneum, SC) is the interface that separates the water-rich inside of the body from the relatively dry external environment. SC forms an effective permeability barrier, which has to be overcome in transdermal drug delivery. LÄS MER