Search for dissertations about: "Per Roos"

Showing result 1 - 5 of 16 swedish dissertations containing the words Per Roos.

  2. 1. 231Pa and Th isotopes as tracers of deep water ventilation and scavenging in the Mediterranean Sea

    Author : Sandra Gdaniec; Per Anerson; Carl-Magnus Mörth; Matthieu Roy-Barman; Helen Coxall; Per Roos; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Protactinium; Thorium; particle transport; deep water circulation; geokemi; Geochemistry;

    Abstract : The naturally occurring isotopes 231Pa and 230Th are used as tracers of marine biogeochemical processes. They are both produced from the radioactive decay of their uniformly distributed uranium parents (235U and 234U) in seawater. READ MORE

  4. 2. Studies of actinides in a superanoxic fjord

    Author : Per Roos; Lund Medicinsk strålningsfysik; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Geology; colloids.; TIMS; pore water; remobilisation; sediments; ultrafiltration; uranium; thorium; americium; plutonium; Anoxic; Framvaren; fjord; physical geography; Geologi; fysisk geografi;

    Abstract : Water column and sediment profiles of plutonium, americium, thorium and uranium have been obtained in the superanoxic Framvaren fjord, southern Norway. The concentrations of bomb test fallout Pu, Am as well as 'dissolved' Th in the bottom water are the highest recorded in the marine environment. READ MORE

  5. 3. Studies on metals in motor neuron disease

    Author : Per M Roos; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : A slow but steady increase in neurodegenerative disorders has been noted in recent decades. Degenerations in the nervous system are found in Alzheimer's disease, Parkinson's disease and motor neuron diseases. Amyotrophic lateral sclerosis (ALS) is the most common of the motor neuron diseases. READ MORE

  6. 4. Scoring the World: The Musical Imagery of Orchestration in Gustav Mahler's Symphonies no. 4 and 5

    Author : Fredrica Roos; Lars Berglund; Per-Henning Olsson; Joakim Tillman; Uppsala universitet; []
    Keywords : HUMANIORA; HUMANITIES; Gustav Mahler; music analysis; orchestration; narratology; Musikvetenskap; Musicology;

    Abstract : Gustav Mahler’s comment to Sibelius in 1907 that a symphony must be like the world is one of classical music’s most cited and has functioned as a crucial springboard for interpretations of the composer’s works. However, these have mostly centred on autobiographical, programmatic, or narrative aspects, with a focus on temporally unfolding plots or generic and semiotic connotations. READ MORE

  7. 5. Manganese and Iron Heterodimers and Homodimers in Enzymes : Insights from Density Functional Theory

    Author : Katarina Roos; Per Siegbahn; Margareta R. A. Blomberg; Frank Neese; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Ribonucleotide reductase; manganese; iron; density functional theory; kemisk fysik; Chemical Physics;

    Abstract : The enzyme ribonucleotide reductase (RNR) catalyzes the reduction of ribonucleotides to deoxyribonucleotides, the building blocks of DNA, and is essential for all organisms. Canonical class I RNR R2 proteins use a diiron cofactor to generate a tyrosyl radical, which is required for catalysis. READ MORE