Search for dissertations about: "organic substances"

Showing result 6 - 10 of 186 swedish dissertations containing the words organic substances.

  2. 6. Analysis of plant growth regulating substances

    Author : Barbro Andersson; Bo Jansson; Umeå universitet; []
    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

  4. 7. Synthesis of a key derivative of glycosylphosphatidylinositol substances and synthesis of spacer glycosides for use in the formation of glycoconjugates and of self-assembled monolayer surfaces

    Author : Liselotte Öhberg; Thomas Norberg; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic Chemistry; organisk kemi;

    Abstract : The first chapter of this thesis describes glycosylation strategies for obtaining derivatives of 2-amino-2-deoxy-a-D-glucopyranosyl-(1-->6)-D-myo-inositol, a key building block for synthesis of glycosylphosphatidylinositol anchor substances and also proposed to be part of a second messenger for insulin.The second chapter describes the synthesis of bifunctional oligoethylene glycol spacers and glycosylation of these for use in formation of glycoconjugates. READ MORE

  5. 8. An insight into the metabolism of New Psychoactive Substances : Structural elucidation of urinary metabolites of synthetic cannabinoids and fentanyl analogues using synthesized reference standards

    Author : Jakob Wallgren; Johan Dahlén; Peter Konradsson; Xiongyu Wu; Mogens Johannsen; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : New Psychoactive Substances (NPS) is an umbrella term covering hundreds of substances across different drug groups. Many of these substances were originally developed for therapeutic use but have later appeared on the recreational drug market. READ MORE

  6. 9. Synthesis and optical characterization of optical power limiting platinum(II) acetylides

    Author : Marcus Carlsson; Bertil Eliasson; Jerker Mårtensson; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Platinum acetylides; nonlinear absorption; optical power limiting; Sonogashira coupling; solution gels; thiophene; Organic chemistry; Organisk kemi;

    Abstract : Interactions between light and a molecule can result in reversible or irreversible changes in properties of both the light and the molecule. Of the many known interactions, nonlinear absorption is a process in which an intense light signal, for instance from a laser, can be moderated. READ MORE

  7. 10. Natural products from Bolivian plants and other sources

    Author : Marcelo Bascope; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Växtbiokemi; Organic chemistry; Organisk kemi; Plant biochemistry; Bolivian plants; ESIMS oxygen adducts; Myrothecium roridum; Silphion persicum; Cyathea boliviana; Rheedia acuminata; Heliconia episcopalis; Iryanthera juruensis; Aniba canelilla; Natural products;

    Abstract : The present research was focused on the phytochemical research of Bolivian plants; a) two medicinal ones Aniba canelilla and Iryanthera juruensis, both plants showed to have compounds with biological activity in different fields. Even though Aniba canelilla was studied before, new compounds were identified in this investigation. READ MORE