Search for dissertations about: "organic substances"

Showing result 1 - 5 of 145 swedish dissertations containing the words organic substances.

  1. 1. Radiosynthesis of Perfluoroalkyl Substances Chemical analysis, uptake, distribution, and partitioning studies

    University dissertation from Stockholm : Department of Materials and Environmental Chemistry (MMK), Stockholm University

    Author : Maria Sundström; Stockholms universitet.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; PFOS; PFOA; PFBS; Environmental Chemistry; miljökemi;

    Abstract : Perfluoroalkyl substances (PFASs) are widely utilized manmade chemicals. Their properties have made them highly appreciated in a variety of industrial and consumer product applications, including fire-fighting foams, hydraulic fluids, as well as in cookware and food contact papers. READ MORE

  2. 2. Synthesis and Evaluation of Photoactive Pyridine Complexes for Electron Transfer Studies and Photoelectrochemical Applications

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Judit Modin; Uppsala universitet.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Fullerene; solar cell; bipyridines; Ruthenium; organic synthesis; Organisk kemi; NATURAL SCIENCES Chemistry Organic chemistry; NATURVETENSKAP Kemi Organisk kemi;

    Abstract : In this thesis, the preparation of new photoactive substances containing mono- and bipyridines coordinated to ruthenium is presented together with initial evaluations of their photoelectrochemical and photophysical properties. Complexes of the type Ru(bpy)2(4-X-py)2 (X = SH, COOH) were prepared and used in Grätzel-type solar cells based on ZnO. READ MORE

  3. 3. New methods and reagents for small scale synthesis of phosphor organic compounds with focus on the phosphonic acids and their analogues

    University dissertation from Umeå : Kemiska institutionen, Umeå universitet

    Author : Rikard Wärme; Umeå universitet.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; micro scale; phosphorus oxyacids; solid phase; chlorination; fluorination; radiolabelling; NATURAL SCIENCES Chemistry Organic chemistry Organic synthesis; NATURVETENSKAP Kemi Organisk kemi Organisk syntes; organisk kemi; Organic Chemistry;

    Abstract : The development of a synthetic method of radiolabelled methylphosphono-fluoridates on a milligram scale is presented. The aim of this method is, besides affording high yield, to choose reaction pathways and reagents so that handling and transfer of labelled toxic substances is minimised, thereby reducing the risk of exposure as much as possible. READ MORE

  4. 4. Analysis of plant growth regulating substances

    University dissertation from Umeå : Umeå universitet

    Author : Barbro Andersson; Umeå universitet.; [1982]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant regulators; phytohormones; pine; spruce; anther; abscisic acid; 3-indoleacetic acid; gibberellin Ag; N- 3-indoleacetyl -aspartic acid; dichlorophene; Amberlite XAD-7; identification; quantification; GC; HPLC; GC-MS; GC-MID; Hormoner;

    Abstract : Natural plant growth regulators (phytohormones) are a group of organic compounds which, in very small amounts, act as regulators of physiological processes in plants.Methods were developed for the analysis of phytohormones in samples from Norway spruce (Picea abies (L.) Karst.) and Scots pine (Pinus sylvestris (L. READ MORE

  5. 5. Reaction Between Grignard reagents and Heterocyclic N-oxides Synthesis of Substituted Pyridines, Piperidines and Piperazines

    University dissertation from Umeå : Umeå universitet

    Author : Hans Andersson; Umeå universitet.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Grignard reagents; pyridine N-oxide; pyrazine N-oxide; dienal-oxime; pyridine; ortho- metalation; piperidine; piperazine; asymmetric; NATURAL SCIENCES Chemistry Organic chemistry Organic synthesis; NATURVETENSKAP Kemi Organisk kemi Organisk syntes; organisk kemi; Organic Chemistry;

    Abstract : This thesis describes the development of new synthetic methodologies for preparation of bioactive interesting compounds, e.g. substituted pyridines, piperidines or piparazines. Thesecompounds are synthesized from commercially available, cheap and easily prepared reagents, videlicet the reaction between Grignard reagents and heterocyclic N-oxides. READ MORE