Sökning: "molecular clock"

Visar resultat 11 - 15 av 42 avhandlingar innehållade orden molecular clock.

  1. 11. Biomarkers in mid-trimester amniotic fluid in relation to gestational duration and spontaneous preterm delivery

    Författare :Maria Hallingström; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; amniotic fluid; biomarkers; cytokine; damage-associated molecular pattern; gestation; gestational duration; inflammation; labor; mid-trimester; multiplex; pregnancy clock; proteins; spontaneous preterm delivery; term delivery;

    Sammanfattning : Background: The biological mechanisms and physiological pathways of pregnancy maintenance and timing of delivery are complex and multifactorial. Pregnancy clocks, partly controlled by timing mechanisms linked to fetal development, which regulate the onset of labor has previously been described. LÄS MER

  3. 12. Rates and patterns of bryophyte molecular evolution

    Författare :Anna-Malin Linde; Ulf Lagercrantz; Nils Cronberg; D. Magnus Eklund; Jonathan Shaw; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biologi med inriktning mot evolutionär funktionsgenomik; Biology with specialization in Evolutionary Functional Genomics;

    Sammanfattning : Plants have been growing on land for at least 450 million years. The bryophytes comprising the three phyla liverworts, mosses and hornworts, are considered to be the closest extant relatives to the plants that colonized land. LÄS MER

  4. 13. Temporal Studies of Molecular Processes using Resonant Spectroscopy : Femtosecond experiments with synchrotron radiation and pulsed lasers

    Författare :Ingela Hjelte; Dennis Lindle; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; Fysik; fysik; Physics;

    Sammanfattning : The physical and chemical properties of matter are to a high degree determined by the electronic structure. One of the most powerful experimental techniques to study the electronic structure is electron spectroscopy. LÄS MER

  5. 14. Sources and Diagnostics for Attosecond Science

    Författare :Miguel Miranda; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Pulse Compression; High-order Harmonic Generation; Ultrafast; Ultrashort; Attosecond; Femtosecond; Pulse Characterization; Fysicumarkivet A:2012:Miranda;

    Sammanfattning : Ultrafast science refers to physical events that happen on the femtosecond (1 fs=10^-15 s) and attosecond (1 as=10^-18 s) timescales. Generation of attosecond pulses is usually achieved by interacting high-intensity femtosecond pulses with matter (typically gases), in a process called high-order harmonic generation (HHG). LÄS MER

  7. 15. Compact solid-state lasers in the near-infrard and visible spectral range

    Författare :Kai Seger; Fredrik Laurell; Uwe Griebner; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; volume Bragg gratings; single-longitudinal-mode laser; laser tuning; Q-switching; mode-locking; carbon nanotubes; semiconductor lasers; neodymium; ytterbium; nonlinear optics; KTP;

    Sammanfattning : The subject of this thesis is the exploration of new concepts for compact solid-state lasers in the visible and near-infrared spectral range using new components such as volume Bragg gratings for wavelength stabilisation and wavelength tuning. Also single-walled carbon nanotubes for mode-locking and Q-switching of lasers have been studied. LÄS MER