Sökning: "masspektrometri"

Visar resultat 1 - 5 av 61 avhandlingar innehållade ordet masspektrometri.

  1. 1. The Impact of Hydrocarbon and Carbon Oxide Impuritiesin the Hydrogen Feed of a PEM Fuel Cell

    Författare :Katrin Kortsdottir; Rakel Wreland Lindström; Göran Lindbergh; Tanja Kallio; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; Fuel Cell; Hydrogen Impurities; Carbon Monoxide; Carbon Dioxide; Ethene; Propene; Methane; Propane; Toluene; Electrochemically Active Surface Area; Cyclic Voltammetry; Mass Spectrometry; bränslecell; vätgasföroreningar; kolmonoxid; koldioxid; eten; propen; metan; propan; toluen; elektrokemisk aktiv yta; cyklisk voltammetri; masspektrometri; Chemical Engineering; Kemiteknik;

    Sammanfattning : The proton exchange membrane fuel cell generates electricity from hydrogen and oxygen (from air) through electrocatalytic reactions in an electrochemical cell. The Pt/C catalyst, commonly used in PEM fuel cells, is very sensitive to impurities that can interact with the active catalyst sites and limit fuel cell performance. LÄS MER

  2. 2. Identification of tissue biomarkers of prognostic significance in pancreatic cancer

    Författare :Dingyuan Hu; Lund Kirurgi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; pancreatic cancer; proteomics; mass spectrometry; Biomarkers; prognosis; CLCA1; pankreascancer; proteomik; masspektrometri; biomarkörer; prognos; CLCA1;

    Sammanfattning : Background: Pancreatic cancer is the third leading cause of cancer-related mortality. Lack of early detection strategies and therapeutic resistance are main contributors to the poor prognosis. Unfortunately, there are no tissue biomarkers available for the prognosis of pancreatic cancer in routine clinical use. LÄS MER

  3. 3. Lipoproteomics : A New Approach to the Identification and Characterization of Proteins in LDL and HDL

    Författare :Helen Karlsson; Mats Lindahl; Christer Tagesson; Pia Davidsson; Linköpings universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; LDL; HDL; Proteomik; Atheroskleros; Masspektrometri; 2-DE; Molecular medicine; Molekylär medicin;

    Sammanfattning : A proteomic approach was applied to examine the protein composition of low-density lipoprotein (LDL) and high-density lipoprotein (HDL) in humans. LDL and HDL were isolated by density gradient ultracentrifugation, and proteins were separated with twodimensional gel electrophoresis (2-DE) and identified with peptide mass fingerprinting, using matrix-assisted laser desorption/ionization-time of flight mass spectrometry, and with amino acid sequencing using electrospray ionization tandem mass spectrometry. LÄS MER

  4. 4. Proteomic Analysis of Urinary Bladder Cancer : Aiming for Novel Biomarkers

    Författare :Mårten Lindén; Per-Uno Malmström; Ulrika Segersten; Sara Bergström Lind; Lars Egevad; Uppsala universitet; []
    Nyckelord :urine; APOE; FGB; GAL1; LRG1; POLR1E; SERPINA1; STMN1; TOP2A; biomarker; diagnostic biomarker; prognostic biomarker; predictive biomarker; mass spectrometry; western blot; dot blot; immunohistochemistry; IHC; tissue microarray; TMA; urothelium; antibody; antibody-based; urinblåsecancer; biomarkör; diagnos; prognos; urin; proteomik; masspektrometri; immunohistokemi; antikroppar; Molecular Biology; Molekylärbiologi; Molekylär medicin; Molecular Medicine;

    Sammanfattning : Urinary bladder cancer is a heterogeneous disease appearing in different forms, e.g. non-muscle invasive and muscle invasive. For all variants, the expression of proteins is interesting to analyze for diagnostic, predictive, prognostic and drug targeting purposes, since it reflects the altered gene expression causing the cancer. LÄS MER

  5. 5. Sample preparation and analysis of metabolites from plants in the families of Cyperaceae, Poaceae and Apiaceae

    Författare :Linus Svenberg; Åsa Emmer; Jenny Lindh; Margareta Sandahl; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Gas chromatography; Mass spectrometry; Ultrasound assisted extraction; Solid-phase microextraction; Volatile compounds; Allelopathy; Bioassay; Gaskromatografi; Masspektrometri; Ultraljudsassisterad extraktion; fastfas-mikroextraktion; Flyktiga ämnen; Allelopati; Bioanalys; Kemi; Chemistry;

    Sammanfattning : An important aspect of understanding how plants effect their environmentis the study of volatile compounds and how these influence interactions between plants and other living organisms. The study of these secondary metabolites from plants can be used in practical applications, such as behaviour control of insects, and is an important part in the search for novel compounds that can be used to influence the behaviour of disease spreading vectors. LÄS MER