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Showing result 1 - 5 of 13 swedish dissertations matching the above criteria.

  2. 1. Benthic-Pelagic Microbial Interactions and Carbon Cycling in Clearwater Lakes

    Author : Eva Andersson; Anna-Kristina Brunberg; Lars Tanvik; Kristina Sundbäck; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; microphytobenthos; phytoplankton; heterotrophic bacteria; interactions; nutrients; carbon cycling; clearwater lakes; Biologi; Biology; Biologi;

    Abstract : This thesis focuses on the interactions among microbiota in clearwater lakes. Field sampling and field experiments were performed to evaluate interactions among microbiota and the importance of benthic versus pelagic microbiota in terms of biomass and production. In addition, carbon cycling in an oligotrophic clearwater lake was calculated. READ MORE

  4. 2. Cholesterol-lowering and anti-atherogenic effects of oats in mice

    Author : Kristina E Andersson; Cellulär biomekanik; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cholesterol; Inflammation; Bile acids; Atherosclerosis; Oats; Beta-glucans;

    Abstract : The cholesterol-lowering effect of oats is well established, but the crucial properties eliciting this effect need to be further investigated to optimize the use of oats as functional foods. Furthermore, there are almost no reports investigating the effect of oats on atherosclerosis development. READ MORE

  5. 3. Influence of Oxygen Concentration on Lipid Oxidation in Food during Storage

    Author : Kristina Andersson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Lipid oxidation in cream powder and rapeseed oil was studied at different oxygen concentrations in the presence or absence of the catalytic factors light and copper. The oxygen concentrations in the headspace of the product ranged from 21 % down to 0.03 %, but particular emphasis was laid on oxygen concentrations below 2 %. READ MORE

  6. 4. Synthesis of Novel Polyhydroxyl Surfactants. Influence of the Relative Stereochemistry on Surfactant Properties

    Author : Kristina Neimert-Andersson; KTH; []
    Keywords : Polyhydroxyl surfactants; Sugar surfactants; Stereoselective; Synthesis; Dihydroxylation; Langmuir monolayers; Chiral discrimination;

    Abstract : This thesis deals with the synthesis and characterization ofnovel polyhydroxyl surfactants. The first part describes thesynthesis of a number of stereoisomers of a polyhydroxylsurfactant, and the second part concerns surface chemicalcharacterization. READ MORE

  7. 5. Synthesis of Polyhydroxylated Surfactants : Comparison of Surfactant Stereoisomers and Investigation of Haemolytic Activity

    Author : Kristina Neimert-Andersson; Peter Somfai; Krister Holmberg; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Polyhydroxy surfactants; Sugar surfactants; Dihydroxylation; Metathesis; Langmuir monolayers; Chiral discrimination; Haemolysis; Organic chemistry; Organisk kemi;

    Abstract : I den här avhandlingen har vi studerat hur man kan göra nya tensider. En tensid är en speciell molekyl som har förmågan att lösa sig i både vatten och olja. Man kan göra följande experiment hemma: Fyll en glasburk till hälften med vatten och tillsätt en droppe matolja. READ MORE