Sökning: "limit of detection"

Visar resultat 1 - 5 av 236 avhandlingar innehållade orden limit of detection.

  1. 1. Neural limits of visual resolution

    Detta är en avhandling från Göteborg

    Författare :Zoran Popovic; Göteborgs universitet.; Gothenburg University.; [2003]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; cell separation; cortical magnification; detection; estimated receptive field; high-pass filtered optotypes; nyquist limit; psychophysics; resolution; ganglion cells;

    Sammanfattning : Aims: The aim of this thesis was to formulate a model of retinal neural circuitry in humans based on morphological estimates of retinal cone and ganglion cell populations, to compare results based on this model to psychophysical measurements of visual resolution and identify the retinal neural factors that limit visual resolution.Materials & Methods: Total displacement of central ganglion cells from foveal cones was obtained by estimating the length of fibers of Henle in four human retinas along the nasal or vertical hemi-meridians. LÄS MER

  2. 2. Detection of Biomolecules Using Volume-Amplified Magnetic Nanobeads

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Teresa Zardán Gómez de la Torre; Maria Strømme; Peter Svedlindh; Mikkel Fougt Hansen; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Magnetic biosensor; magnetic nanobeads; Brownian relaxation; padlock probe; rolling circle amplification; DNA detection; protein detection; Teknisk fysik med inriktning mot nanoteknologi och funktionella material; Engineering Science with specialization in Nanotechnology and Functional Materials;

    Sammanfattning : This thesis describes a new approach to biomolecular analysis, called the volume-amplified magnetic nanobead detection assay (VAM-DNA). It is a sensitive, specific magnetic bioassay that offers a potential platform for the development of low-cost, easy-to-use diagnostic devices. LÄS MER

  3. 3. Pushing edge detection to the limit : towards building semantic features for human emotion recognition

    Detta är en avhandling från Umeå : Department of Applied Physics and Electronics, Umeå University

    Författare :Bo Li; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; edge detection; multi-scale; threshold; hysteresis; non-maximum suppression; redundancy; center of mass; integral image; bottom-up feature;

    Sammanfattning : .... LÄS MER

  4. 4. Preclinical studies of roscovitine

    Detta är en avhandling från Stockholm : Karolinska Institutet, Department of Medicine

    Författare :Marina Vita; Karolinska Institutet.; Karolinska Institutet.; [2005]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Roscovitine; Metabolism; Pharmacokinetics; LC-MS; Cdk-inhibitor; Toxicity;

    Sammanfattning : Cyclin-dependent kinases (Cdks) are key enzymes implicated in vital functions of the cell including regulation of the cell cycle, apoptosis, transcription and differentiation. Abnormal regulation of these molecules has been correlated to several diseases, such as cancer, viral infections, neural disorders and kidney inflammations. LÄS MER

  5. 5. Sensitivity, Noise and Detection of Enzyme Inhibition in Progress Curves

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Omar Gutierrez Arenas; Helena Danielson; Athel Cornish-Bowden; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biochemistry; Progress curves; limit of detection; Z -factor; primary screening; enzyme inhibition; error structure; sensitivity analysis; High-throughput screning; Biokemi;

    Sammanfattning : Starting with the development of an enzymatic assay, where an enzyme in solution hydrolysed a solid-phase bound peptide, a model for the kinetics of enzyme action was introduced. This model allowed the estimation of kinetic parameters and enzyme activity for a system that has the peculiarity of not being saturable with the substrate, but with the enzyme. LÄS MER