Sökning: "Limonene"

Visar resultat 1 - 5 av 37 avhandlingar innehållade ordet Limonene.

  1. 1. Clinical and experimental studies on oxidized fragrance terpenes as contact allergens

    Författare :Johanna Bråred Christensson; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :autoxidation; contact allergy; limonene; linalool; colophonium; limonene-1-hydroperoxide; limonene-2-hydroperoxide; 15-hydroperoxyabietic acid; 15-HPA; terpenes; local lymph node assay; LLNA; Freunds complete adjuvant test; FCAT; patch testing; laser Doppler imaging; skin irritation; visual reading;

    Sammanfattning : The work presented in this thesis aims to improve the possibilities for diagnosing contact allergy to oxidized limonene and linalool and to, in patients, study contact allergy from structurally closely related hydroperoxides with regard to their specificity, potency and cross-reactivity. The fragrance terpenes limonene (from citrus oil) and linalool (from lavender oil) are widely used in household and industrial products. LÄS MER

  2. 2. Citrus Waste Biorefinery: Process Development, Simulation and Economic Analysis

    Författare :Mohammad Pour Bafrani; Mohammad Pourbafrani; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; process simulation; encapsulated yeast; Citrus wastes; economic analysis; computational fluid dynamic simulation; pectin; limonene; methane; ethanol; citrus waste; biorefinery; biogas; Bioteknik;

    Sammanfattning : The production of ethanol and other sustainable products including methane, limonene and pectin from citrus wastes (CWs) was studied in the present thesis. In the first part of the work, the CWs were hydrolyzed using enzymes – pectinase, cellulase and β-glucosidase – and the hydrolyzate was fermented using encapsulated yeasts in the presence of the inhibitor compound ‘limonene’. LÄS MER

  3. 3. 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. 4. Ethanol Production from Cellulosic Biomass by Encapsulated Saccharomyces cerevisiae

    Författare :Farid Talebnia; Högskolan i Borås; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; encapsulated cells; ethanol; s.cerevisiae; dilute-acid hydrolyzate; in situ detoxification; furfural; orange peels; experimental design; immobilization; limonene;

    Sammanfattning : Unstable oil markets with rising environmental concerns have revived widespread interest in production of fuel ethanol from renewable materials. Cellulosic materials are abundant and prominent feedstocks for cheap ethanol production. However, due to recalcitrant structure of these materials, pretreatment is a prerequisite. LÄS MER

  5. 5. Diffusion in Poly(vinyl alcohol) and Polyethylene as Determined by Computational Simulations and Modeling

    Författare :Gunnar Karlsson; KTH; []
    Nyckelord :Molecular dynamics; simulation; modeling; polymer; poly vinyl alcohol ; polyethylene; water; oxygen; limonene; solute; diffusion; transport properties;

    Sammanfattning : Poly(vinyl alcohol) and polyethylene polymer systems werebuilt in order to study their transport properties (diffusion).First a verification of the AMBER force field was conducted fora poly(vinyl alcohol) system built from a chain with 145repeating units. NPT-molecular dynamics simulations attemperatures between 400 and 527 K were performed. LÄS MER