Search for dissertations about: "secondary ion mass spectrometry SIMS"

Showing result 1 - 5 of 57 swedish dissertations containing the words secondary ion mass spectrometry SIMS.

  2. 1. Spatial analysis of lipids in tissue samples applying mass spectrometry imaging

    Author : Masoumeh Dowlatshahi Pour; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; SIMS; MALDI; Mass spectrometry imaging; Lipid; ME-SIMS; Sample preparation;

    Abstract : Lipids are important naturally occurring components in all living cellular organisms. They serve as the main building blocks of cellular membranes, participate in many signaling pathways and are also stored as an energy source. READ MORE

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

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

    Abstract : .... READ MORE

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

    Author : Birgitta Jälevik; Göteborgs universitet; []
    Keywords : 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;

    Abstract : 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. READ MORE

  6. 4. Molecular and epidemiological studies on eyes with pseudoexfoliation syndrome

    Author : Amelie Botling Taube; Jonas Bergquist; Albert Alm; Eva Larsson; Hannu Uusitalo; Uppsala universitet; []
    Keywords : 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;

    Abstract : 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. READ MORE

  7. 5. Single fluid inclusion analysis using ToF-SIMS : Implications for ancient Earth biodiversiy and paleoenvironment studies

    Author : Sandra Siljeström; Jukka Lausmaa; Andrew Steele; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ToF-SIMS; time-of-flight secondary ion mass spectrometry; fluid inclusions; biomarkers; hopanes; steranes; early life; paleoenvironment; oil; eukaryotes; Earth sciences; Geovetenskap; geokemi; Geochemistry;

    Abstract : When and how life first emerged on the Earth is an area of intense research. Signs of the first life on Earth, including morphological fossils, are scarce and hard to interpret. An alternative approach is to study organic biomarkers, which are molecular fossils commonly considered as bona fide biosignatures. READ MORE