Search for dissertations about: "Ions"

Showing result 1 - 5 of 1295 swedish dissertations containing the word Ions.

  1. 1. Precision measurements on negative ions

    Author : Moa Kristiansson; Henning T. Schmidt; Dag Hanstorp; Henning Zettergren; Christophe Blondel; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Negative ions; Atomic physics; Precision measurement; Electron affinity; Photodetachment; Physics; fysik;

    Abstract : In this thesis, experiments with negative ions performed at the DESIREE facility are presented. DESIREE consists of two electrostatic storage rings operated at 13 K. The low temperature in combination with a low pressure allows for storage times of the negative ion beams to be up to several hours. READ MORE

  2. 2. Carbonate Ions and Gastric Cancer

    Author : Roy Ehrnström; Malmö Patologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICAL AND HEALTH SCIENCES; Medicine human and vertebrates ; ODC; COX-2; inflammation; Wistar rats; duodenogastric reflux; Medicin människa och djur ; proliferation; gastrojejunostomy; carbonate ions; Experimental gastric cancer;

    Abstract : Nearly one million new cases of gastric cancer are diagnosed annually throughout the world. Even though the incidence has fallen dramatically in recent decades, this disease is still the second leading cause of cancer death in a global perspective. READ MORE

  3. 3. Excited States in Negative Ions

    Author : Johan Rohlén; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : Negative Ions; Photodetachment; Atomic Physics; Experimental Physics;

    Abstract : This thesis covers experimental studies of atomic negative ions with the main goal of increasing our fundamental understanding of these fragile quantum systems. Comparisons of measurements and calculations have been used to increase our understanding of these highly correlated, yet simple, systems. READ MORE

  4. 4. Experimental studies of cluster ions containing water, ammonia, pyridine and bisulphate

    Author : Mauritz Johan Ryding; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : clusters; ions; water; ammonia; pyridine; bisulphate; cross sections; collision induced dissociation CID ; kinetic modelling; electrospray ionization ESI ; time-of-flight TOF ; mass spectrometry;

    Abstract : Molecular cluster ions are fascinating subjects of study. Bridging the size gap between molecules and bulk, they often display non-trivial size dependent behaviour and properties. READ MORE

  5. 5. Nanopatterning by Swift Heavy Ions

    Author : Marek Skupinski; Klas Hjört; Jens Jensen; Christina Trautmann; Uppsala universitet; []
    Keywords : Materials science; swift heavy ions; lithography; nanopatterning; self-assembly; Materialvetenskap;

    Abstract : Today, the dominating way of patterning nanosystems is by irradiation-based lithography (e-beam, DUV, EUV, and ions). Compared to the other irradiations, ion tracks created by swift heavy ions in matter give the highest contrast, and its inelastic scattering facilitate minute widening and high aspect ratios (up to several thousands). READ MORE