Sökning: "FTIR spectroscopy"

Visar resultat 1 - 5 av 110 avhandlingar innehållade orden FTIR spectroscopy.

  1. 1. Infrared and Photoelectron Spectroscopic Studies of Adsorbates on Solid Surfaces: Experiments and DFT Calculations

    Detta är en avhandling från Chemical Physics, Lund University

    Författare :Jakob Blomquist; Lunds universitet.; Lund University.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; magnetic resonance; supraconductors; magnetic and optical properties; electrical; Solid Surfaces; Chemistry; Kemi; Condensed matter:electronic structure; FTIR spectroscopy; DFT Cluster calculations; Anharmonicity; Photoelectron spectroscopy; relaxation; spectroscopy; Kondenserade materiens egenskaper:elektronstruktur; egenskaper elektriska; magnetiska och optiska ; supraledare; magnetisk resonans; spektroskopi; Surface and boundary layery chemistry; Ytkemi; gränsskikt;

    Sammanfattning : Popular Abstract in Swedish För att förstå atomära och molekylära processer och interaktioner i ett mikroskopiskt perspektiv ? med andra ord, förstå kemin! ? behövs högkvalitativa mätningar och beräkningar på modellsystem, där alla okända parametrar har rensats bort, så att det enskilda egenheter och storheter kan studeras utan inverkan av yttre störningar. Experimentellt uppnås detta tex. LÄS MER

  2. 2. Improving interpretation by orthogonal variation Multivariate analysis of spectroscopic data

    Detta är en avhandling från Umeå : Kemiska institutionen, Umeå universitet

    Författare :Hans Stenlund; Umeå universitet.; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; OPLS; PLS; Multivariate Analysis; Orthogonal variation; Chemometrics; hyperspectral images; FTIR; NIR; spectroscopy; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi;

    Sammanfattning : The desire to use the tools and concepts of chemometrics when studying problems in the life sciences, especially biology and medicine, has prompted chemometricians to shift their focus away from their field‘s traditional emphasis on model predictivity and towards the more contemporary objective of optimizing information exchange via model interpretation. The complex data structures that are captured by modern advanced analytical instruments open up new possibilities for extracting information from complex data sets. LÄS MER

  3. 3. Fourier Transform Infrared Spectroscopy in Industrial Hygiene Applications Assessment of Emissions from and Exposures in Wood Processing Industries

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Urban Svedberg; Uppsala universitet.; [2004]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Medicine; FTIR; Exposure; Emission; Saw mills; Wood pellets; Tracer gas; Monoterpenes; Hexanal; Carbon monoxide; Open path FTIR; Medicin; MEDICINE Dermatology and venerology; clinical genetics; internal medicine; MEDICIN Dermatologi och venerologi; klinisk genetik; invärtesmedicin;

    Sammanfattning : This thesis evaluates the use of Fourier Transform Infrared Spectroscopy (FTIR) as an approach to the increasingly difficult air sampling challenges within the field of occupational and environmental hygiene. The application of FTIR is exemplified by the assessment of emissions from and exposures in the sawmill and pellet industries. LÄS MER

  4. 4. Early Hydration of Portland Cement

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Rikard Ylmén; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; SEM; freeze-drying; cement; calorimetry; nano-silica; carbonation; hydration; FTIR; infrared spectroscopy;

    Sammanfattning : The production of cement is responsible forapproximately 7 % of the total CO2 emissions caused by man. To compensate for high energyconsumption and CO2 emission, thus making the utilization of concrete more sustainable,several strategies can be used. LÄS MER

  5. 5. (In-)Stability of LiPF6-based Electrolytes for Lithium-ion Batteries

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Susanne Wilken; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; FTIR; additives; Lithium batteries; Raman; electrolytes; thermal decomposition; NMR spectroscopy;

    Sammanfattning : The state of the art lithium-ion batteries present in most portable electronics consist of the salt LiPF6, organic solvents such as ethylene carbonate and dimethyl carbonate (commonly seen as EC/DMC), and finally, a number of additives - all components enclosed by different kinds of electrode chemistries.Despite their commercial success, all LiPF6 based electrolytes suffer from poor chemical and thermal stability. LÄS MER