Sökning: "secondary ion mass spectrometry"

Visar resultat 1 - 5 av 90 avhandlingar innehållade orden secondary ion mass spectrometry.

  1. 1. Enamel hypomineralization in permanent first molars. A clinical, histo-morphological and biochemical study

    Författare :Birgitta Jälevik; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Adolescent; Calcium Metabolism Disorders; complications; Child; Child; Preschool; Dental Enamel; chemistry; Dental Enamel Hypoplasia; epidemiology; etiology; metabolism; pathology; Female; Humans; Male; Molar; pathology; Prevalence; Respiratory Insufficiency; complications; Spectrometry; Mass; Secondary Ion; Sweden; epidemiology;

    Sammanfattning : Hypomineralization in the permanent first molars was common in a group of 516 Swedish 8-year-old children. Ninety-five children (18.4%) had at least one molar with demarcated opacity. The incisors frequently displayed opacities concomitantly. LÄS MER

  3. 2. Quantitative applications of secondary ion mass spectrometry : solid-state diffusion and mass fractionation studies

    Författare :Ulf Södervall; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Secondary ion mass spactromy SIMS ; isotopic ratios; elemental semiconductors; ionazion mechanisms; mass fractionation; high pressure; diffusion; activation parameters; isotope effects;

    Sammanfattning : .... LÄS MER

  4. 3. High Rate Electron Capture Dissociation Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

    Författare :Youri Tsybin; Per Håkansson; Ron M.A. Heeren; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; mass spectrometry; Fourier transform ion cyclotron resonance; peptides and proteins; ion-electron interaction; electron capture dissociation; infrared multiphoton dissociation; liquid chromatography; capillary electrophoresis; Fysik; Physics; Fysik;

    Sammanfattning : Advances in science and technology during the past decade have greatly enhanced the level of the structural investigation of macromolecules – peptides and proteins. Biological mass spectrometry has become one of the most precise and sensitive techniques in peptide and protein analysis. LÄS MER

  5. 4. Secondary and Higher Order Structural Characterization of Peptides and Proteins by Mass Spectrometry

    Författare :Christopher Adams; Roman Zubarev; Göran Possnert; Carlito Lebrilla; Uppsala universitet; []
    Nyckelord :Engineering physics; Protein Structure; Mass Spectrometry; Electron Capture Dissociation; Tandem Mass Spectrometry; Teknisk fysik;

    Sammanfattning : The work in this thesis has demonstrated the advantages and limitations of using MS based technologies in protein and peptide structural studies. Tandem MS, specifically electron capture dissociation (ECD) have shown the ability to provide structural insights in molecules containing the slightest of all modifications (D-AA substitution). LÄS MER

  7. 5. Molecular and epidemiological studies on eyes with pseudoexfoliation syndrome

    Författare :Amelie Botling Taube; Jonas Bergquist; Albert Alm; Eva Larsson; Hannu Uusitalo; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pseduoexfoliation syndrome; PEX; aqueous humor; cataract; cataract surgery; lens capsule; proteomics; mass spectrometry; MS; MALDI TOF MS MS; quantitative proteomics; iTRAQ; dimethyl labeling; imaging mass spectrometry; IMS; time of flight secondary ion mass spectrometry; TOF-SIMS; crystallin; epidemiology; risk factor; Ophtalmology; Oftalmiatrik;

    Sammanfattning : Pseudoexfoliation (PEX) syndrome is an age-related condition characterized by the production and accumulation of extracellular fibrillary material in the anterior segment of the eye. PEX predisposes for several pathological conditions, such as glaucoma and complications during and after cataract surgery. LÄS MER