Sökning: "Monoterpene"

Visar resultat 1 - 5 av 16 avhandlingar innehållade ordet Monoterpene.

  1. 1. Oxidation of terpenes in indoor environments : A study of influencing factors

    Författare :Linda Pommer; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Monoterpene; Ozone O3 ; Nitrogen dioxide NO2 ; Nitrogen oxide NO ; Relative humidity RH ; Modelling; Scrubber; Experimental design; Interaction; Volatile organic compounds VOC ; Sick buildings syndrome SBS ; Principal component analysis PCA ; Indoor air; Ventilation; Tenax TA; Sodium sulphite; Miljökemi; Environmental chemistry; Miljökemi; analytisk kemi; Analytical Chemistry;

    Sammanfattning : In this thesis the oxidation of monoterpenes by O3 and NO2 and factors that influenced the oxidation were studied. In the environment both ozone (O3) and nitrogen dioxide (NO2) are present as oxidising gases, which causes sampling artefacts when using Tenax TA as an adsorbent to sample organic compounds in the air. LÄS MER

  3. 2. Biotransformations of Turpentine Constituents : Oxygenation and Esterification

    Författare :Marica Lindmark-Henriksson; KTH; []
    Nyckelord :Picea abies; Pinaceae; Essential oils composition; Terpene alcohol; Hemiacetal; Hemiacetal ester; TMP-turpentine; Monoterpene; alpha-pinene; beta-pinene; Limonene; Verbenol; Pinocarveol; Borneol; Myrtenol; Suspension cell culture; Biotransformation; ;

    Sammanfattning : This thesis describes methods to obtain value–addedcompounds from TMP-turpentine obtained from the spruce, Piceaabies. The methodology focuses on biotransformations using twoapproaches: an oxygenation approach (i.e. oxygenation ofterpene hydrocarbons by cell cultures) and an esterificationapproach (i. LÄS MER

  4. 3. Chemical reactions in ventilation systems : Ozonolysis of monoterpenes

    Författare :Jerker Fick; Barbro Andersson; Charles Weschler; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Monoterpene; Ozone; OH Radical; Ozonolysis; Ventilation; Potassium Iodide; Experimental Design; Heat Exchanger; Miljökemi; Environmental chemistry; Miljökemi;

    Sammanfattning : Chemicals in indoor air, either emitted from a source or from a reaction, have been suggested to cause ill health in buildings. However, no clear correlations between exposure and health effects have been made. In this thesis we studied the reaction between monoterpenes, a group of biogenic unsaturated C10 hydrocarbons, and ozone. LÄS MER

  5. 4. Foreign molecules in biomembranes : Molecular effects on intact stratum corneum and model lipid systems

    Författare :Quoc Dat Pham; Fysikalisk kemi; []
    Nyckelord :stratum corneum; lipid; keratin filament; protein; DMPC; penetration enhancer; osmolyte; solvent; monoterpene; fatty acid; hydration; molecular mobility; fluidity; permeability; PT ssNMR; diffusion cell;

    Sammanfattning : This thesis mainly explores how the molecular mobility of lipid and protein components in the outermost layer of the skin, the stratum corneum (SC), varies with different conditions and upon adding foreign compounds. These studies require methods that makes it possible to detect and characterize the minor amount of fluid components in the highly ordered solid SC sample with resolved molecular information. LÄS MER

  7. 5. Chemodiversity and Functions of Monoterpene Hydrocarbons in Conifers

    Författare :Monika Persson; KTH; []
    Nyckelord :Conifers; Picea abies; Pinus sylvestris; Pinus yunnanensis; Pinus armandii; monoterpenes; enantiomeric composition; correlations; chemotaxonomy; two-dimensional gas chromatography; induced stress; Tomicus piniperda; Leptographium wingfieldii;

    Sammanfattning : .... LÄS MER