Search for dissertations about: "organic substances"

Showing result 16 - 20 of 186 swedish dissertations containing the words organic substances.

  2. 16. Organic Phosphorus Compounds in Aquatic Sediments : Analysis, Abundance and Effects

    Author : Joakim Ahlgren; Emil Rydin; Monica Waldebäck; Lars Tranvik; Karin Markides; Sven Blomqvist; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Organic phosphorus; aquatic sediment; eutrophication; NMR; internal loading; sample preparation; extraction; degradation; Miljökemi; Environmental chemistry; Miljökemi;

    Abstract : Phosphorus (P) is often the limiting nutrient in lacustrine and brackish eco-systems, and enhanced input of P into an aquatic system might therefore negatively impact the environment. Because modern waste water manage-ment have reduced external P input to surface waters, internal P loading from the sediment has become one of the main P sources to aquatic ecosys-tems, in which relatively unknown organic P compounds seem to be more active in P recycling than previously thought. READ MORE

  4. 17. Legacy and emerging pollutants in pristine and polluted boreal catchments

    Author : Anh Minh Nguyen; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Persistent organic pollutants (POPs) are bioaccumulative chemicals that are ubiquitously and globally distributed in the environment. Several species of POPs have been studied extensively and are continuously being monitored in various environmental matrices for decades. READ MORE

  5. 18. Synthesis and spectroscopic characterization of emerging synthetic cannabinoids and cathinones

    Author : Andreas Carlsson; Johan Dahlén; Martin Josefsson; Peter Konradsson; Simon Dunne; Mikael Hedeland; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The application of different analytical techniques is fundamental in forensic drug analysis. In the wake of the occurrence of large numbers of new psychoactive substances possessing similar chemical structures as already known ones, focus has been placed on applied criteria for their univocal identification. READ MORE

  6. 19. BIOACTIVE ORGANOMETALLIC COMPOUNDS

    Author : Haris Bjelosevic; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; biological; kinetic; gold; platinum; bioactive; phosphine; ruthenocene; Ferrocene;

    Abstract : Various metal complexes have been used in medicine traditionally, although their use was often connected with mystery and with a lack of empirically (clinically) proven effect. In modern times, the development of biochemistry, bioinorganic and bioorganometallic chemistry allows us more in-depth understanding of biological action of metal containing substances. READ MORE

  7. 20. Structural studies of some capsular polysaccharides from Streptococcus pneumoniae and a study of o̲-formyl groups in carbohydrates

    Author : Ulf Lindquist; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Structural studies of the capsular polysaccharides from Streptococcus pneumoniae type 4, 5 and 17A are summarized. The principal methods in these studies were n.m.r. READ MORE