Sökning: "Johan Sjödahl"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Johan Sjödahl.

1. 1. Miniaturized Techniques for Protein Analysis

   Författare :Johan Sjödahl; KTH; []
   Nyckelord :Proteins; peptides; proteases; Antarctic krill; Euphausia superba; capillary electrophoresis; fluorosurfactants; mass spectrometry; nanoelectrospray; ESI; MALDI; chip; high-throughput; reproducibility; sensitivity; mass accuracy;

   Sammanfattning : Proteins are a highly diversified group of molecules, andfor their study, advanced analytical tools are required. Inparticular, a need for high-throughput techniques has emergedin order to enable the characterization of large sets ofproteins. LÄS MER

3. 2. 3D localization in digital holography from scattered light from micrometer-sized particles

   Författare :Johan Öhman; Mikael Sjödahl; Per Bergström; Erik Olsson; Torbjörn Löfqvist; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Digital Holography; Polarization; Particle Scattering; Metrology; Experimentell mekanik; Experimental Mechanics;

   Sammanfattning : When a particle is illuminated by a beam of light it will scatter and redistribute the light in all directions. How it scatters depends on the size, shape and refractive index of the particle. Additionally, it depends on the wavelength and polarization of the illuminating beam. LÄS MER

4. 3. Polarization-Resolved Particle Holography

   Författare :Johan Öhman; Mikael Sjödahl; Erik Olsson; Per Bergström; Pietro Ferraro; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Experimentell mekanik; Experimental Mechanics;

   Sammanfattning : In this thesis, measurement of particle fields using digital holography is the main subject. The questions investigated consider positioning, identification and sizing of nanometer and micrometer particles. The thesis explore these topics using both simulations and experimental measurements. LÄS MER

5. 4. Experimental investigation of snow metamorphism at near-surface layers

   Författare :Lavan Kumar Eppanapelli; Mikael Sjödahl; Johan Casselgren; Arne Instanes; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Snow metamorphism; NIR reflectance; Snow and Ice; Radiative transfer equation; Paramterization; Snow properties; Tomography; Snow microstructure; Experimentell mekanik; Experimental Mechanics;

   Sammanfattning : Snow metamorphism is a direct objective in many snow research areas, and its charac-terisation is a major challenge in areas including winter road maintenance, detection of icing on wind turbine blades, and snow quality mapping for skiing. A common effect of snow metamorphism is compaction, which can be investigated from the associated vari-ations in physical properties of snow. LÄS MER

7. 5. Surgery and immuno modulation in Crohn’s disease

   Författare :Pär Myrelid; Johan D. Söderholm; Peter Andersson; Rune Sjödahl; Bruce George; Linköpings universitet; []
   Nyckelord :Crohn’s disease; surgery; immuno modulation; complications; stoma; anastomosis; DSS; bursting pressure; MEDICINE; MEDICIN;

   Sammanfattning : Crohn’s disease is a chronic inflammatory bowel disease with unknown origin. This study investigates the combined use of surgery and immuno modulation in Crohn’s disease. The outcome of medication and surgery in 371 operations on 237 patients between 1989 and 2006 were evaluated. LÄS MER