Search for dissertations about: "Furans"

Showing result 1 - 5 of 15 swedish dissertations containing the word Furans.

  1. 1. Development of new Catalytic Methods for the Selective Synthesis of Heterocycles

    University dissertation from Stockholm : Department of Organic Chemistry, Stockholm University

    Author : Stalin Reddy Pathi Pati; Stockholms universitet.; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; catalysis; indium; heterocycles; Lewis acid; multicomponent reactions; furans; alkynes; Organic Chemistry; organisk kemi;

    Abstract : In the field of organic chemistry, the development of new catalytic methods for the synthesis of complex molecules from simple precursors is a top priority. The main focus of this thesis concerns the diastereoselective synthesis of heterocyclic compounds using main group elements as Lewis acid catalysts. READ MORE

  2. 2. Polybrominated dibenzo-p-dioxins and furans from source of emission to human exposure

    University dissertation from Örebro : Örebro University

    Author : Filip Bjurlid; Örebro universitet.; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; PBDD Fs; PCDD Fs; marine mammal; combustion; fire; human milk; occupational exposure;

    Abstract : Brominated flame retardants (BFRs), which are ubiquitous in modern life and the environment, are the major source for polybrominated dibenzo-p-dioxins and furans (PBDD/Fs). The knowledge about PBDD/Fs is lim-ited compared to other environmental pollutants, even though PBDD/Fs show similar toxicity as polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) which are considered to be among the most toxic man-made substances. READ MORE

  3. 3. Microbial and enzymatic syntheses of polymer building blocks through selective transformations of polyols and furans

    University dissertation from Department of Chemistry, Lund University

    Author : Mahmoud Sayed Ali Sayed; Lunds universitet.; Lund University.; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mycobacterium sp. MS1601; G. oxydans; oxidase; lipase; trimethylolpropane TMP ; 2; 2- bis hydroxymethyl butyric acid BHMB ; 5-hydroxymethyl furfural 5-HMF ; 5-hydroxymethyl-2-furan carboxylic acid HMFCA ; 2; 5-furandicarboxylic acid FDCA ; cyclic carbonate ; estrification; Biotransformation; polymer building blocks; product recovery; selective oxidation; bioprocess engneering; cell recycling; cell bleeding; DNA recombinant technology; in-silico analysis;

    Abstract : AbstractTransition from fossil- to bio-based economy is a critical step towards reduction of greenhouse gas emissions and climate change, and hence for achievement of sustainable communities and environment. In order to be fossil-free, the chemical and material industry is in need of carbon-neutral building blocks from renewable resources for the diverse array of products that are currently produced from olefins and aromatics. READ MORE

  4. 4. Ethanol from Lignocellulose - Fermentation Inhibitors, Detoxification and Genetic Engineering of Saccharomyces cerevisiae for Increased Resistance

    University dissertation from Applied Microbiology (LTH)

    Author : Simona Larsson; Lunds universitet.; Lund University.; [2000]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; detoxification; S. cerevisiae; lignocellulose; inhibition; phenolic compounds; laccase; Microbiology; bacteriology; virology; mycology; Mikrobiologi; bakteriologi; virologi; mykologi;

    Abstract : Ethanol can be produced from lignocellulose by first hydrolysing the material to sugars, and then fermenting the hydrolysate with the yeast Saccharomyces cerevisiae. Hydrolysis using dilute sulphuric acid has advantages over other methods, however, compounds which inhibit fermentation are generated during this kind of hydrolysis. READ MORE

  5. 5. On the combustion and photolytic degradation products of some brominated flame retardants

    University dissertation from Umeå : Umeå universitet

    Author : Gunilla Söderström; Umeå universitet.; [2003]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; PBCDD; PBCDF; PBDD; PBDF; PBDE; HBCD; TBBP-A; combustion; photolytic; MSW; Miljökemi; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi;

    Abstract : Many modern products, especially electronic goods, are protected by brominated flame retardants (BFR). Some of the most common flame retardants are polybrominated diphenylethers (PBDE), tetrabromobisphenol-A (TBBP-A) and hexabromocyclododecane (HBCD). READ MORE