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Showing result 1 - 5 of 1526 swedish dissertations matching the above criteria.

  2. 1. Sorption and weathering properties of naturally occurring chlorites

    Author : Åsa Gustafsson; KTH; []
    Keywords : chlorite; nickel; sorption; surface complexation; dissolution rate.;

    Abstract : Chlorite is a ferrous silicate mineral occurring as afracture filling mineral in the Swedish granite bedrock thatsurrounds the area of the candidate Swedish geologicalrepositories for nuclear waste. To investigate the importance of chlorites as a naturalbarrier for radionuclide migration sorption of Ni(II) onto anatural chlorite was chosen as the studied system. READ MORE

  4. 2. Studies of reactions occurring in the AUC-process : from UF₆ to sintered UO₂ pellets

    Author : Lars Hälldahl; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This study has been carried out to investigate the influence of process parameters upon the material characteristics during the conversion of UFg to UO2 powder, and the importance of variation in these charcteristics for the final quality of the sintered pellets. The first process step is a precipitation of ammonium uranyl carbonate (AUC) from UFg, ammonia and carbon dioxide. READ MORE

  5. 3. Population regulation in two co-occurring crayfish species

    Author : Björn Söderbäck; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE

  6. 4. The photophysics and functions of some naturally occurring carotenoids

    Author : Helena Billsten; Kemisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; Fysikalisk kemi; xanthophyll-binding proteins; vibrational relaxation; light-harvesting complexes; carotenoid aggregates; carotenoids; excited states; femtosecond pump-probe spectroscopy; xanthophylls;

    Abstract : Carotenoids are one of the most widespread and important group of pigments in Nature and they can act as light-harvesting agents, photoprotectors and antioxidants. Mechanisms of their multiple functions are not fully understood mainly because their complicated photophysics involving ?dark? excited states. READ MORE

  7. 5. Co-occurring Symptoms of Attention Deficit Hyperactivity Disorder and Depression : Sex, Aetiology, Help-Seeking and Assessment

    Author : Karin Sonnby; Kent W. Nilsson; Mia Ramklint; Hans Ågren; Uppsala universitet; []
    Keywords : Attention deficit hyperactivity disorder; depression; adolescent; sex; sexual abuse; transcription factor AP-2β; help-seeking; attachment object; validation study; Child and Youth Psychiatry; Barn- och ungdomspsykiatri;

    Abstract : The general aim of the thesis was to contribute to the knowledge about co-occurring symptoms of ADHD and depression in adolescence, focusing on sex differences, as well as aetiology, help-seeking and assessment.Studies I–III used epidemiological samples of self-reports from all students in Västmanland aged 15–16 and 17–18 years. READ MORE