Sökning: "Infrared Spectroscopy FT-IR"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden Infrared Spectroscopy FT-IR.

  1. 1. Ultrastructural Aspects of Pulp Fibers as Studied by Dynamic FT-IR Spectroscopy

    Detta är en avhandling från Stockholm : Fiber- och polymerteknologi

    Författare :Margaretha Åkerholm; KTH.; [2003]
    Nyckelord :cellulose; cooperation; crystallinity; dynamic test; glucomannan; hardwood; holocellulose; humidity; infrared spectroscopy; kraft pulp; lignin; mechanical pulp; orientation; polarised light; softwood; strain; sulphite pulp; viscoelasticity; xylan;

    Sammanfattning : Dynamic (or 2D) FT-IR spectroscopy in combination withpolarized IR irradiation has been used in this work to studywood polymer orientation and interactions on theultrastructural level in wood fibers in the native state aswell as the effects of different pulping processes. The woodpolymer interactions were studied under both dry and humidconditions. LÄS MER

  2. 2. Measurement of trace components in aqueous solutions with near and mid infrared Fourier transform spectroscopy

    Detta är en avhandling från Department of Physics, Lund University

    Författare :Peter Snoer Jensen; Lunds universitet.; Lund University.; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Near-infrared; Temperature dependency; Dual-beam; Optical null; Optimal pathlength Haemodialysis liquid; Urea; Glucose; Phosphate; Atom- och molekylärfysik; Atomic and molecular physics; Infrared; Water absorption; Fourier transform spectroscopy; Fysicumarkivet A:2003:Snoer Jensen;

    Sammanfattning : Popular Abstract in Swedish Denna avhandling handlar om hur man kan mäta små mängder av ett antal intressanta molekyler i en vattenlösning med hjälp av infrarödspektroskopi. Det är viktigt att kunna bestämma mängden av olika spårämnen i en vattenlösning i en rad olika tillämpningar. LÄS MER

  3. 3. Long-term properties of polyethylene films efficiency of a natural antioxidant

    Detta är en avhandling från Stockholm : KTH

    Författare :Clara Strandberg; KTH.; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polymer Technology; alfa-tocopherol; Polyethylene PE ; Thermal aging; Infrared Spectroscopy FT-IR ; Chemiluminescence CL ; Solid-phase microextraction SPME ; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi;

    Sammanfattning : There is a growing awareness of the risks of pollution in biological systems and one potential problem is the synthetic antioxidants, used for e.g. the stabilisation of polymeric materials. Natural antioxidants are an interesting alternative, if the high efficiency and thermal stability of the synthetic compounds can be reached. LÄS MER

  4. 4. The Colours of Diabetes advances and novel applications of molecular optical techniques for studies of the pancreas

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Christoffer Nord; Umeå universitet.; [2016]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Optical projection tomography; Technique development; Near-infrared; 3D visualization; Biomedical imaging; ß-cell mass; Diabetes; Vibrational micro spectroscopy;

    Sammanfattning : Diabetes is a rapidly increasing health problem. In a global perspective,approximately 415 million people suffered from diabetes in 2015 and this number ispredicted to increase to 640 million by 2040. To tackle this pandemic there is a needfor better analytical tools by which we can increase our understanding of the disease. LÄS MER

  5. 5. Nanocelluloses - surface modification and use in functional materials

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Michaela Salajková; KTH.; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nanocellulose; surfactant; surface modification; papermaking process; quaternary ammonium salt;

    Sammanfattning : Cellulose nanocomposites offer interesting potential in terms of improved properties and new functionalities compared with microcomposites. Preparation from colloidal suspensions is promising, since high reinforcement content is possible and a wide range of constituents can be used. LÄS MER