Sökning: "Gradients"

Visar resultat 1 - 5 av 497 avhandlingar innehållade ordet Gradients.

  1. 1. Directing Angiogenesis Cellular Responses to Gradients in vitro

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Irmeli Barkefors; Johan Kreuger; Lena Kjellén; Pär Gerwins; Ferdinand Le Noble; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Angiogenesis; Endothelial cell; Cell migration; Chemotaxis; Gradients; Microfluidics; VEGFA; VEGFR2; Exocyst; Exocytosis; NATURAL SCIENCES Biology Cell and molecular biology; NATURVETENSKAP Biologi Cell- och molekylärbiologi; Medical Biochemistry; Medicinsk biokemi;

    Sammanfattning : Blood vessels are essential for the delivery of nutrients and oxygen to tissues, as well as for the removal of waste products. Patients with tumors, wounds or diabetes all have active angiogenesis, formation and remodeling of blood vessels, a process that is initiated and manipulated by gradients of secreted signaling proteins. LÄS MER

  2. 2. Bipolar electrochemistry for high throughput screening applications

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Sara Munktell; Fredrik Björefors; Maria Hahlin; Tautgirdas Ruzgas; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bipolar electrochemistry; electrodeposition; corrosion; screening; gradients; recycling; gold nanoparticles; Scanning Droplet Cell; Hard x-ray photoelectron spectroscopy; pitting corrosion; Kemi med inriktning mot materialkemi; Chemistry with specialization in Materials Chemistry;

    Sammanfattning : Bipolar electrochemistry is an interesting concept for high throughput screening techniques due to the ability to induce gradients in a range of materials and their properties, such as composition, particle size, or dopant levels, among many others. One of the key advantages of the method is the ability to test, create or modify materials without the need for a direct electrical connection. LÄS MER

  3. 3. Phytoplankton of Baltic environmental gradients : observations on potentially toxic species

    Detta är en avhandling från Stockholm : Stockholm University

    Författare :Susanna Hajdu; [2002]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Växtplankton; Östersjön;

    Sammanfattning : .... LÄS MER

  4. 4. Gradients of time and complexity understanding how riparian and instream ecosystems recover after stream restoration

    Detta är en avhandling från Umeå : Umeå University

    Författare :Eliza Maher Hasselquist; Christer Nilsson; Stewart Rood; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bioassessment; biodiversity; boreal; bryophyte; chronosequence; complexity; diatom; geomorphology; habitat heterogeneity; hydromorphological; macroinvertebrate; macrophyte; nitrogen cycling; river restoration; riparian buffer; stable isotopes; succession; Sweden; Environmental Science; miljövetenskap;

    Sammanfattning : Why evaluations of the ecological outcomes of stream and river restoration have largely reported inconclusive or negative results has been the subject of much debate over the last decade or more. Understanding the reasons behind the lack of positive results is important for bettering future restoration efforts and setting realistic expectations for restoration outcomes. LÄS MER

  5. 5. Static and Dynamic Modelling of the Drying Section of a Paper Machine

    Detta är en avhandling från Department of Chemical Engineering, Lund University

    Författare :Magnus Karlsson; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Pappers- och massateknik; Modelling; Wood; Paper; Multi-Cylinder; Simulation; Control; Steam; Air; Dew Point; Moisture Gradients; pulp and paper technology; Pressure Gradients;

    Sammanfattning : The paper making process involves chopping of wood, cooking and forming, followed by dewatering in a vacuum section, press section and drying section. Several models for the most important parts of the paper machine drying section are presented in this thesis to describe phenomena at steady state and during state transitions. LÄS MER