Search for dissertations about: "barium"

Showing result 1 - 5 of 59 swedish dissertations containing the word barium.

  2. 1. Prevention of barium sulfate deposition in a D (Chlorine Dioxide) - stage : a chemical model

    Author : Malin Persson; KTH; []
    Keywords : Barium; Sulfate; Chlorine dioxide; Sytem closure; Deposits; Precipitation; Chemical model; Steady state; Inorganic compounds; Kraft pulping; Paper mills; Inhibitors;

    Abstract : .... READ MORE

  4. 2. Spectroscopic Studies of the Elements Ba, Fe, Ga, In and Ru

    Author : Hans Karlsson; Enheten för fysikalisk och teoretisk kemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fourier transform spectroscopy; branching fractions; oscillator strengths; term analysis; hyperfine structure; barium; gallium; iron; indium; Condensed matter:electronic structure; ruthenium.; magnetic and optical properties; electrical; spectroscopy; relaxation; magnetic resonance; supraconductors; egenskaper elektriska; Kondenserade materiens egenskaper:elektronstruktur; magnetiska och optiska ; supraledare; magnetisk resonans; spektroskopi; Astronomy; space research; cosmic chemistry; Astronomi; rymdvetenskap; kosmisk kemi; Fysicumarkivet A:2002:Karlsson;

    Abstract : New measurements of the elements Ba, Fe, Ga, In and Ru are reported. The analysis of barium contains new wavelengths, improved energy level values and new values of the ionization limit in both Ba I and Ba II. Oscillator strengths and radiative lifetimes in Fe II, as a part of the FERRUM project, are reported. READ MORE

  5. 3. Catalytic combustion of methane

    Author : Philippe Thevenin; KTH; []
    Keywords : catalytic combustion; gas turbine; methane; palladium; alumina; barium; lanthanum; oxidation; preparation; temperature-programmed oxidation TPO ; decomposition; reoxidation; X-ray photoelectron spectroscopy XPS ; metal-support interaction; deactiva;

    Abstract : Catalytic combustion is an environmentally benign technologywhich has recently reached the stage of commercialization.Palladium is the catalyst of choice when considering gasturbines fuelled with natural gas because of its superioractivity for methane oxidation. READ MORE

  6. 4. Radium and Barium Co-precipitation A Pre-study

    Author : Hanna Hedström; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : .... READ MORE

  7. 5. Radiological evaluation of esophageal function in dysphagia with special emphasis on achalasia

    Author : Mats Andersson; Göteborgs universitet; []
    Keywords : Achalasia; Dysphagia; Radiography; Barium esophagogram; Reproducibility of findings; Observer variation; Laparoscopic myotomy; Balloon dilatation; Esophageal neoplasms;

    Abstract : In idiopathic achalasia, degeneration of the inhibitory innervation of the esophageal smooth muscle results in absence of primary peristalsis and in incomplete relaxation of the lower esophageal sphincter (LES). All treatments for achalasia aim at reducing the pressure gradient across the LES, thus facilitating esophageal emptying by gravity. READ MORE