Search for dissertations about: "Toluene"

Showing result 1 - 5 of 71 swedish dissertations containing the word Toluene.

  1. 1. The Impact of Hydrocarbon and Carbon Oxide Impuritiesin the Hydrogen Feed of a PEM Fuel Cell

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Katrin Kortsdottir; KTH.; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fuel Cell; Hydrogen Impurities; Carbon Monoxide; Carbon Dioxide; Ethene; Propene; Methane; Propane; Toluene; Electrochemically Active Surface Area; Cyclic Voltammetry; Mass Spectrometry; bränslecell; vätgasföroreningar; kolmonoxid; koldioxid; eten; propen; metan; propan; toluen; elektrokemisk aktiv yta; cyklisk voltammetri; masspektrometri; Chemical Engineering; Kemiteknik;

    Abstract : The proton exchange membrane fuel cell generates electricity from hydrogen and oxygen (from air) through electrocatalytic reactions in an electrochemical cell. The Pt/C catalyst, commonly used in PEM fuel cells, is very sensitive to impurities that can interact with the active catalyst sites and limit fuel cell performance. READ MORE

  2. 2. Alkylation and Hydrodearomatization over Zeolite cCatalysts

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Jun-Jun Yuan; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Acid catalysts; ZSM-5 catalysts; ethylbenzene; toluene; temperature; diesel fuel; hydrodearomatization; benzene; acidic protons; activity and selectivity; aqueous ethanol; Pt Y zeolite; gasoline; pressure; GC; diethylbenzene; Hydrocracking; SiO2 Al2O3 ratio; alkylation of aromatics; Brønsted acids;

    Abstract : The alkylation of aromatic compounds is widely used in the large-scale synthesis of petrochemicals, and a great variety of fine chemicals and intermediates. Acid catalysts used for alkylation of aromatic hydrocarbons are Brønsted acids containing acidic protons. READ MORE

  3. 3. Physiologically based pharmacokinetic modeling in risk assessment - Development of Bayesian population methods

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Fredrik Jonsson; Uppsala universitet.; [2001]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical biosciences; methyl chloride; dichloromethane; toluene; styrene; uncertainty; intra- individual variability; risk assessment; physiologically based modeling; Markov chain Monte Carlo; PBPK; Bayesian; population modeling; Farmaceutisk biovetenskap; PHARMACY Biopharmacy; FARMACI Biofarmaci; Biopharmaceutics; biofarmaci;

    Abstract : In risk assessment of risk chemicals, variability in susceptibility in the population is an important aspect. The health hazard of a pollutant is related to the internal exposure to the chemical, i.e. the target dose, rather than the external exposure. READ MORE

  4. 4. Acute toluene effects on neurotransmission in the central nervous system

    University dissertation from Stockholm : Karolinska Institutet, false

    Author : Karl Stengård; Karolinska Institutet.; Karolinska Institutet.; [1996]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; acetylcholine; aspartate; cerebellum; dopamine; GABA; globus pallidus; glutamate; microdialysis; rat; striatum; toluene; ;

    Abstract : The aim of this thesis was to develop a method to study the effects of toluene in thecentral nervous system of the rat. Microdialysis on awake rats was used to studytoluene's effects on the transmission of dopamine, acetylcholine, glutamate andaspartate in the striatum, and on GABA in the striatum, the cerebellum and the globuspallidus. READ MORE

  5. 5. Biomarkers of aromatic isocyanates in exposed workers

    University dissertation from Divison of Occupational and Environmental Medicine and Psychiatric Epidemiology

    Author : Pernilla Lind; Lunds universitet.; Lund University.; [1997]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; adducts; biomarkers; exposure; occupational; methylenediphenyl diisocyanate; toluene diisocyanate; amines; isocyanates; polyurethane; Gas chromatography; mass spectrometry; Occupational health; industrial medicine; Yrkesmedicin; arbetsmiljömedicin;

    Abstract : Popular Abstract in Swedish Isocyanater är en grupp kemiska ämnen som används vid tillverkning av polyuretanplast (PUR). PUR ingår bland annat i färg, lim, lack och skumgummi, vilka förekommer i många olika produkter i vår miljö. Produktionen och användningen av PUR-produkter ökar. READ MORE