Sökning: "chromophore"

Visar resultat 36 - 40 av 74 avhandlingar innehållade ordet chromophore.

  1. 36. Sol-Gel Glasses Doped with Pt-Acetylides and Gold Nanoparticles for Enhanced Optical Power Limiting

    Författare :Hampus Lundén; Mikael Lindgren; Cesar Lopes; Staffan Tjörnhammar; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : High power laser pulses can be a threat to sensors, including the human eye. Traditionally this threat has been alleviated by colour filters that blocks radiation in chosen wavelength ranges. LÄS MER

  3. 37. Shedding light on retinal. A contribution to the understanding of the primary process of vision

    Författare :Fredrik Blomgren; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; retinal; rhodopsin; quantum mechanics molecular mechanics; calculations; ab initio;

    Sammanfattning : In our eyes light is absorbed by a polyene molecule called retinal. This molecule contains six double bonds and is bonded to a protein. The protein-chromophore complex is called rhodopsin and has been structurally determined by crystallography. It was early suggested that the main event in vision is a cis-trans isomerization of retinal. LÄS MER

  4. 38. Quantum chemical characterization of oxide nanoparticles and interactions on their surfaces

    Författare :Marta Galynska; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cluster models; TiO2 nanoparticles; anatase; rutile; brookite; group-IV oxides; DFT;

    Sammanfattning : Titanium dioxide and related oxide materials have been investigated using density functional theory calculations. Nanocrystalline particles were modelled by a finite cluster approach. LÄS MER

  5. 39. Spectroscopic studies of biomolecules confined in self-assembled nanostructures

    Författare :Nils Carlsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The present thesis examines the effects of incorporating biomolecules into self-assembled nanostructures. This approach is exemplified by short DNA molecules in environments close to lipid bilayers and the immobilization of enzymes into mesoporous silica particles. LÄS MER

  7. 40. Retinoid processing in vivo : characterization and structure-function analysis of retinol dehydrogenases

    Författare :Kristian Tryggvason; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Retinol; vitamin A; retinol dehydrogenase; reporter assay;

    Sammanfattning : Retinoids (vitamin A derivatives) are vital nutrients that regulate a variety of physiological processes, including embryonic development, postnatal growth, reproduction, cell differentiation as well as maintenance of the immune system and vision. Most of the physiological functions of retinoids are believed to be controlled by retinoic acid (RA) altered gene expression via two classes of nuclear hormone receptors, the RARs and RXRs. LÄS MER