Search for dissertations about: "force spectroscopy"

Showing result 1 - 5 of 188 swedish dissertations containing the words force spectroscopy.

  2. 1. Reconstructing force from harmonic motion

    Author : Daniel Platz; David B. Haviland; John E. Sader; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; oscillator; force spectroscopy; atomic force microscopy; intermodulation; multifrequency; inverse problem; high quality factor;

    Abstract : High-quality factor oscillators are often used in measurements of verysmall force since they exhibit an enhanced sensitivity in the narrow frequencyband around resonance. Forces containing frequencies outside this frequencyband are often not detectable and the total force acting on the oscillatorremains unknown. READ MORE

  4. 2. Light interactions in flexible conjugated dyes

    Author : Jonas Sjöqvist; Patrick Norman; Per-Olof Åstrand; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; force field; molecular dynamics; QM MM; solvation effects; absorption spectroscopy; fluorescence spectrosocopy; infrared spectroscopy; Raman spectroscopy; stokes shift; conjugated polyelectrolytes;

    Abstract : In this thesis methodological developments have been made for the description of flexible conjugated dyes in room temperature spectrum calculations.The methods in question target increased accuracy and efficiency by combining classical molecular dynamics (MD) simulations with time-dependent response theory spectrum calculations. READ MORE

  5. 3. Conformations of Flexible Oligosaccharides : Molecular Simulations and NMR spectroscopy

    Author : Robert Pendrill; Göran Widmalm; Jens Duus; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Carbohydrates; Oligosaccharide; Conformation; NMR spectroscopy; MD simulations; organisk kemi; Organic Chemistry;

    Abstract : The conformational preferences of several oligosaccharides are investigated herein using a combination of NMR spectroscopy and molecular dynamics (MD) simulations, focusing on the torsion angles associated with the glycosidic linkages.Strategies for obtaining usable J-HMBC spectra for carbons with an adjacent 13C label are described. READ MORE

  6. 4. Construction of force measuring optical tweezers instrumentation and investigations of biophysical properties of bacterial adhesion organelles

    Author : Magnus Andersson; Ove Axner; Lene Broeng Oddershede; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; optical tweezers; biological physics; unfolding; Escherichia coli; force measurements; energy landscape; dynamic force spectroscopy; manipulation; polymers; pili; Physics; Fysik;

    Abstract : Optical tweezers are a technique in which microscopic-sized particles, including living cells and bacteria, can be non-intrusively trapped with high accuracy solely using focused light. The technique has therefore become a powerful tool in the field of biophysics. READ MORE

  7. 5. Diffuse Optical Spectroscopy and Imaging of Turbid Media

    Author : Can Xu; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; upconverting nanoparticles; luminescence; fluorescence; inverse problem; diffuse reflection spectroscopy; biomedical optics; photon migration; biomedical imaging; gas spectroscopy; medical diagnostics; tomography; Fysicumarkivet A:2013:Xu;

    Abstract : This thesis deals with optical spectroscopy and imaging of complex and strongly scattering turbid media. Focus is mainly placed on three topics, being i) diffuse optical spectroscopy of choroidal tumors, ii) gas spectroscopy in scattering materials using the GASMAS (gas in scattering media absorption spectroscopy) technique, and iii) luminescence diffuse optical imaging and tomography of tissues. READ MORE