Search for dissertations about: "UV-VIS spectroscopy"

Showing result 1 - 5 of 56 swedish dissertations containing the words UV-VIS spectroscopy.

  2. 1. Formation of chromophores and leucochromophores during manufacturing of mechanical pulp

    Author : Mattias Johansson; KTH; []
    Keywords : Chromophores; Kubelka-theory; Leucochromophores; Mechanical pulp; NMR spectroscopy; Reflectance spectroscopy; Spruce wood; UV-VIS spectroscopy;

    Abstract : .... READ MORE

  4. 2. The influence of high temperature on the discoloration and degradation of carbohydrates and on hydrogen peroxide bleaching of spruce TMP

    Author : Louise Logenius; Hans Höglund; Roland Agnemo; Mittuniversitetet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Temperature; metal ions; cellulose; glucuronic acid; UV-Vis spectroscopy; spruce; TMP; hydrogen peroxide bleaching; spectroscopy; optical properties; Chemical engineering; Kemiteknik;

    Abstract : When processing wood to obtain pulp, the fibers are subjected to high temperatureat moisture levels and to the influence of metal ions. Many process developmentshave resulted in utilization of higher temperatures that induce chemical reactionsin the wood fibers. This thesis deals with some aspects of using high temperaturesin pulping processes. READ MORE

  5. 3. Multivariate spectroscopic methods for the analysis of solutions

    Author : Kent Wiberg; Sven Jacobsson; Lars Nørgaard; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemometrics; UV-Vis spectroscopy; Multivariate calibration; Lidocaine; Identity; Content; PLS; SIMCA; Non-column; Diode array UV spectroscopy; DAD; Control sample; High Capacity Analysis HCA ; Fluorescence spectroscopy; Albumin; Immunoglobulin G; HPLC-DAD; Prilocaine; Peak purity determination; PCA; PARAFAC; Partial separation; Curve resolution; Analytical chemistry; Analytisk kemi;

    Abstract : In this thesis some multivariate spectroscopic methods for the analysis of solutions are proposed. Spectroscopy and multivariate data analysis form a powerful combination for obtaining both quantitative and qualitative information and it is shown how spectroscopic techniques in combination with chemometric data evaluation can be used to obtain rapid, simple and efficient analytical methods. READ MORE

  6. 4. Electronic and Geometrical Structure of Phthalocyanines on Surfaces : An Electron Spectroscopy and Scanning Tunneling Microscopy Study

    Author : John Åhlund; Carla Puglia; Joachim Schiessling; Emanuelle Göthelid; Nils Mårtensson; Nadine Witkowski; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; PhotoElectron Spectroscopy PES ; X-ray Absorption Spectroscopy XAS ; UltraViolet-Visible absorption spectroscopy UV-Vis ; Scanning Tunneling Microscopy STM ; Phthalocyanine Pc ; Iron Phthalocyanine FePc ; metal-free Phthalocyanine H2Pc ; Zinc Phthalocyanine ZnPc ; Graphite HOPG ; Indium Antimony InSb ; Surface science; Fysik;

    Abstract : Core- and Valence Photoelectron Spectroscopy (PES), X-ray- and Ultraviolet-Visible Absorption Spectroscopy (XAS and UV-Vis), Scanning Tunneling Microscopy (STM) and Density Functional Theory (DFT) calculations are used to study the electronic and geometrical structure of a class of macro-cyclic molecules, Phthalocyanines (Pc), on surfaces. These molecules are widely studied due to their application in many different fields. READ MORE

  7. 5. Optical characterization of potential drugs and drug delivery systems

    Author : Erik Rosenbaum; Lennart B-Å Johansson; Sven Engström; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Pilicide; Ganglioside GM1 micelles; Drug Delivery; Elecronic Energy Transfer; UV-Vis Absorption; Fluorescence Spectroscopy; Biophysical chemistry; Biofysikalisk kemi; fysikalisk kemi; Physical Chemistry;

    Abstract : This Thesis is a characterization study on substances having potency as drugs as well as on a lipid based drug-delivery matrix. The optical properties of newly synthesized molecules with proven pilicide properties have been characterized with several spectroscopic methods. READ MORE