Search for dissertations about: "tandem mass spectrometry"

Showing result 6 - 10 of 133 swedish dissertations containing the words tandem mass spectrometry.

  2. 6. Organic Phosphorus Compounds in Aquatic Sediments : Towards Molecular Identification with Mass Spectrometry

    Author : Heidi De Brabandere; Monica Waldebäck; Emil Rydin; Per J. R. Sjöberg; Rolf Danielsson; William T. Cooper; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; electrospray ionisation; mass spectrometry; liquid chromatography; organic phosphorus; aquatic sediment; eutrophication; sample preparation; extraction; Analytical chemistry; Analytisk kemi;

    Abstract : Phosphorus (P) regulates trophic status in most aquatic systems. However, only bioavailable P contributes to primary production. In most lakes and shallow seas, mineralisation of sediment P into its bioavailable form and its release to the water column is important for maintaining primary production. READ MORE

  4. 7. Chiral Recognition by Means of Mass Spectrometry

    Author : Oleksii Rebrov; Mats Larsson; Per Johnsson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chirality; Mass spectrometry; Chiral recognition; Gas phase; kemisk fysik; Chemical Physics;

    Abstract : This thesis is based on experimental studies of chiral ions in gas-phase. Electrospray ion source platform (Stockholm University) and commercially available Quadrupole Time-of-Flight mass spectrometer have been used in our studies. READ MORE

  5. 8. Characterization of Polypeptides by Tandem Mass Spectrometry Using Complementary Fragmentation Techniques

    Author : Michael Lund Nielsen; Roman A. Zubarev; Per Andrén; Ole Nörregaard Jensen; Uppsala universitet; []
    Keywords : Analytical chemistry; Mass Spectrometry; Electron capture dissociation ECD ; Collision-activated dissociation CAD ; Proteomics; Post-translational modifications; De Novo sequencing; Bioinformatics; Analytisk kemi;

    Abstract : In the growing field of proteomics identification of proteins by tandem mass spectrometry (MS/MS) is performed by matching experimental mass spectra against calculated spectra of all possible peptides in a protein database. One problem with this approach is the false-positive identifications. READ MORE

  6. 9. Accelerator Mass Spectrometry of 36Cl and 129I : Analytical Aspects and Applications

    Author : Vasily Alfimov; Göran Possnert; Ala Aldahan; Hans-Arno Synal; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Environmental technology; Accelerator Mass Spectrometry; iodine-129; chlorine-36; gas-filled magnet; radioactive tracer; Arctic Ocean; Nordic Seas; North Atlantic; thermohaline circulation; Sellafield; La Hague; Miljöteknik; Environmental engineering; Miljöteknik;

    Abstract : Two long-lived halogen radionuclides (36Cl, T1/2 = 301 kyr, and 129I, T1/2 = 15.7 Myr) have been studied by means of Accelerator Mass Spectrometry (AMS) at the Uppsala Tandem Laboratory. The 36Cl measurements in natural samples using a medium-sized tandem accelerator (~1 MeV/amu) have been considered. READ MORE

  7. 10. The accuracy of statistical confidence estimates in shotgun proteomics

    Author : Viktor Granholm; Lukas Käll; Alexey Nesvizhskii; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Proteomics; Peptides; Statistics; Mass spectrometry; Tandem mass spectrometry; Biochemistry towards Bioinformatics; biokemi med inriktning mot bioinformatik;

    Abstract : High-throughput techniques are currently some of the most promising methods to study molecular biology, with the potential to improve medicine and enable new biological applications. In proteomics, the large scale study of proteins, the leading method is mass spectrometry. READ MORE