Sökning: "Near-infrared spectroscopy"

Visar resultat 16 - 20 av 96 avhandlingar innehållade orden Near-infrared spectroscopy.

  1. 16. The Colours of Diabetes : advances and novel applications of molecular optical techniques for studies of the pancreas

    Författare :Christoffer Nord; Ulf Ahlgren; Ian Smyth; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Optical projection tomography; Technique development; Near-infrared; 3D visualization; Biomedical imaging; ß-cell mass; Diabetes; Vibrational micro spectroscopy;

    Sammanfattning : Diabetes is a rapidly increasing health problem. In a global perspective,approximately 415 million people suffered from diabetes in 2015 and this number ispredicted to increase to 640 million by 2040. To tackle this pandemic there is a needfor better analytical tools by which we can increase our understanding of the disease. LÄS MER

  3. 17. Continuous-filtering Vernier spectroscopy

    Författare :Chuang Lu; Aleksandra Foltynowicz; Ove Axner; Wei Ren; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; spectroscopy; spectrometer; laser; optical frequency comb; optical cavity; NIR; MIR; flame; robust; time resolution; spectrum; fysik; Physics;

    Sammanfattning : Continuous-filtering Vernier spectroscopy (CF-VS) is a laser-based detection technique that combines the broad spectral coverage of an optical frequency comb (OFC) with the enhanced interaction length provided by an optical cavity. The resonances of the cavity filter the OFC to a small group of comb modes that probe the transitions of the species present in the cavity. LÄS MER

  4. 18. Non-invasive optical monitoring of free and bound oxygen in humans

    Författare :Emilie Krite Svanberg; Anestesiologi och intensivvård; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Intensive care; oxygenation; free gas; near-infrared spectroscopy; absorption spectroscopy; scattering;

    Sammanfattning : Background: Possibilities of detecting oxygen - both in its free form, as gas in the lungs, and in its bound form, as oxygenated hemoglobin - have been explored in this thesis. Perfusion and oxygenation of vital organs (e.g. LÄS MER

  5. 19. High-Sensitivity High-Resolution Diode Laser Spectroscopy in the Near-Infrared Region

    Författare :Viacheslav G. Avetisov; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:1996:Avetisov;

    Sammanfattning : High-resolution spectroscopy measurements have been performed using near-infrared diode lasers. Special emphasis was placed upon high accuracy absorption lineshape measurements, which provide the basis for quantitative gas analysis. For this purpose, relevant spectral characteristics of the radiation emitted by diode lasers were studied. LÄS MER

  7. 20. Near-Infrared Spectroscopy and Extractive Probe Sampling for Biomass and Combustion Characterization

    Författare :Jan Skvaril; Konstantinos Kyprianidis; Anestis Kalfas; Mälardalens högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy- and Environmental Engineering; energi- och miljöteknik;

    Sammanfattning : Biomass is characterized by highly variable properties. It can be converted to more valuable energy forms and products through a variety of conversion processes. This thesis focuses on addressing several important issues related to combustion and pulping. LÄS MER