Sökning: "CHEM"

Visar resultat 6 - 10 av 20 avhandlingar innehållade ordet CHEM.

  1. 6. Experimental studies of kinetic solvent deuterium isotope effects on proton abstraction in alcohol solution

    Författare :Jan-Olof Levin; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The present dissertation is an account based on investigations published in the following papers:I. JAN-OLGF LEVIN and CHRISTOFFER RAPPE, Solvent Deuterium Isotope Effects in Alcohols. I. Racemization of Phenyl2,2-Diphenylcyclopropyl Ketone, 3-Nethyl-4-phenyl-2-butanone and 2-Nethyl-1-indanone. LÄS MER

  3. 7. Novel Pentofuranose Chemistry to Modulate RNA Function

    Författare :Mansoureh Karimiahmadabadi; Jyoti Chattapadhyaya; Jesper Wengel; Uppsala universitet; []
    Nyckelord :pentofuranose chemistry; conformationally locked nucleoside; carbocyclic-LNA; bicyclo[2.2.1]heptane;

    Sammanfattning : Chemical modifications of oligonucleotides provide an important tool to understand how the natural substrate works as well as how to improve their biochemical and biological properties as potential therapeutics and diagnostics. Our carba-LNA (2',4'-carba-bridged Locked Nucleic Acid) modified oligo-DNA or -RNA have been found to be useful to modulate oligo-RNA and -DNA activity. LÄS MER

  4. 8. Ultrasound Contrast Agents Loaded with Magnetic Nanoparticles : Acoustic and Mechanical Characterization

    Författare :VeeraVenkata Satyanarayana Kothapalli; Lars-Åke Brodin; Jan Engvall; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultrasound contrast agents; SPION nanoparticles; harmonic oscillation; backscattering power; attenuation coefficient; phase velocity; nonlinear equation of motion;

    Sammanfattning : The current methodologies in body scanning diagnostic uses different simultaneous imaging modalities like Ultrasound (US), magnetic resonance imaging (MRI), single photon emission tomography (SPECT) and positron emission tomography (PET). The field requires combination of different modalities for effective use in clinical diagnostics. LÄS MER

  5. 9. Computer simulations of electronic energy transfer and a molecular dynamics study of a decapeptide

    Författare :Maria Lindberg; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Electronic energy transfer; Monte Carlo simulations; two-particle model; GAF-theory; anisotropic systems; fluorescence depolarization ratios; Brownian Dynamics; rotating donors; Molecular Dynamics; peptide; renin inhibitor;

    Sammanfattning : Electronic energy transfer has been investigated in pure donor systems by means of computer simulations. Calculated properties were the probability that the initially excited donor is excited at a time t after the excitation, Gs(t), the mean square displacement of the excitation and different fluorescence observables. LÄS MER

  7. 10. Structural studies on human transferrin

    Författare :Jan-Olof Jeppsson; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : This review is a dissertation and contains a summary of the following publications:I. J.-O Jeppsson and J. Sjöquist: Separation of Normal Human Transferrin into Two Fractions. LÄS MER