Sökning: "Diffusion model"

Visar resultat 11 - 15 av 826 avhandlingar innehållade orden Diffusion model.

  1. 11. Theory of Hydrogen Quantum Diffusion

    Författare :Thomas Mattsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; path-integrals; isotope effect; transition state theory; quantum; diffusion; hydrogen; first-principles calculations; nickel;

    Sammanfattning : Atomic hydrogen adsorbed on a metal surface is one of the simplest possible examples of chemisorption, yet it is very challenging. The adsorption and the very elementary process of surface diffusion, a single atomic jump, have been investigated theoretically using several methods. LÄS MER

  3. 12. The kinetics of cellulose enzymatic hydrolysis : Implications of the synergism between enzymes

    Författare :Priit Väljamäe; Jan-Christer Janson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biochemistry; Acetobacter; Cellobiohydrolase; Cellobiose; Cellulase; Cellulose; Diffusion; Endoglucanase; Hydrolysis; Inhibition; Kinetics; Model; Product; Substrate; Surface; Synergism; Trichoderma reesei; Biokemi; Biochemistry; Biokemi; biokemi; Biochemistry;

    Sammanfattning : The hydrolysis kinetics of bacterial cellulose and its derivatives by Trichoderma reesei cellulases was studied. The cellulose surface erosion model was introduced to explain the gradual and strong retardation of the rate of enzymatic hydrolysis of cellulose. LÄS MER

  4. 13. Development of Novel Diffusion NMR Methods : Preclinical Applications in Colloidal Model Systems

    Författare :Stefanie Eriksson; Fysikalisk kemi; []
    Nyckelord :diffusion NMR; diffusion tensor; Microscopic anisotropy; q-MAS; exchange; liquid crystals; yeast cell suspensions;

    Sammanfattning : NMR is a powerful non-invasive technique utilizing radiofrequency and gradient pulses to manipulate the spinsof atomic nuclei. In particular, diffusion NMR uses strong magnetic field gradients to label the positions of spins allowing for the measurement of translational motion of molecules in liquids. LÄS MER

  5. 14. Innovation Diffusion in the Construction Sector

    Författare :Kristian Widén; Bengt Hansson; Marcela Miozzo; Byggproduktion; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Anläggningsteknik; Construction technology; Industriell ekonomi; Commercial and industrial economics; Construction Sector; Innovation; Diffusion; Anläggningsteknik; Construction technology; Industriell ekonomi; Commercial and industrial economics; Construction Sector; Innovation; Diffusion;

    Sammanfattning : Innovation and development are the backbone of a thriving market economy. It is through innovations of various kinds that nations, industries and companies compete. Many actions in areas internationally and nationally will affect the construction sector. Research into construction innovation has attracted increasing interest. LÄS MER

  7. 15. Studies of asphaltenes in model systems

    Författare :Jenny-Ann Östlund; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; shape; diffusion; stability; geometry; asphaltenes; pulsed field gradient spin echo NMR; sixe; kinetic; flocculation; aggregation;

    Sammanfattning : .... LÄS MER