Sökning: "Kristina Andersson"

Visar resultat 6 - 10 av 22 avhandlingar innehållade orden Kristina Andersson.

  1. 6. Synthesis of Polyhydroxylated Surfactants : Comparison of Surfactant Stereoisomers and Investigation of Haemolytic Activity

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

    Sammanfattning : 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. LÄS MER

  3. 7. Mellan lag och moral : Civil olydnad och militanta veganer i fyra svenska dagstidningar åren omkring millennieskiftet

    Författare :Yvonne Andersson; Kristina Widestedt; Gunilla Jarlbro; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; journalism; civil disobedience; militant vegans; animal rights; rhetorical analysis; protagonist; antagonist; the Mediapolis; moral standpoints; Media and communication studies; Medie- och kommunikationsvetenskap; journalistik; Journalism;

    Sammanfattning : The main purpose of the dissertation is to describe how four Swedish newspapers construct ethical standpoints and what norms they prescribe. This is done through a characterization of the civil disobedience discourse, in particular the discourse about animal rights activism and militant vegans, around the turn of the millennium (1990-2004). LÄS MER

  4. 8. Polybrominated dibenzo-p-dioxins : Natural formation mechanisms and biota retention, maternal transfer, and effects

    Författare :Kristina Arnoldsson; Peter Haglund; Patrik Andersson; Walter Vetter; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polybrominated dibenzo-p-dioxins; PBDDs; Baltic Sea; uptake; retention; maternal transfer; metabolism; bioavailability; natural formation; precursor; bromoperoxidase; bromophenol; photochemical transformation; oxidative coupling; hydroxylated polybrominated diphenyl ethers; Chemistry; Kemi; analytisk kemi; Analytical Chemistry;

    Sammanfattning : Polybrominated dibenzo-p-dioxins (PBDD) and dibenzofurans (PBDF) are a group of compounds of emerging interest as potential environmental stressors. Their structures as well as toxic responses are similar to the highly characterized toxicants polychlorinated dibenzo-p-dioxins. LÄS MER

  5. 9. Entrepreneurs and Small-Scale Enterprises : Self Reported Health, Work Conditions, Work Environment Management and Occupational Health Services

    Författare :Kristina Gunnarsson; Malin Josephson; Eva Vingård; Ing-Marie Andersson; Gunnar Rosén; Stig Vinberg; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; small-scale enterprises; SSE; entrepreneur; self-rated health; systematic work environment management; work conditions; social life; Occupational Health Service; OHS; Occupational medicine; Yrkesmedicin; Arbets- och miljömedicin; Occupational and Environmental Medicine;

    Sammanfattning : This thesis focused on factors contributing to improved work environment in small-scale enterprises and sustainable health for the entrepreneurs. In Study I, implementation of the provision of Systematic Work Environment Management (SWEM) with and without support was investigated. Two implementation methods were used, supervised and network method. LÄS MER

  7. 10. Mechanisms structuring the pelagic microbial food web : Importance of resource and predation

    Författare :Kristina Samuelsson; Agneta Andersson; Christiane Lancelot; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; pelagic microbial food web; bacteria; flagellates; ciliates; phytoplankton; mixotrophy; nutrient status; predation limitation; resource limitation; Baltic Sea; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Sammanfattning : Temporal and spatial variations of pelagic microorganisms in the northern Baltic Sea were studied, as well as factors influencing their abundance and growth rates. Three main questions were asked 1) How does increased productivity influence the structure of the microbial food web? 2) Does predation limitation vary between trophic levels? 3) What is the relative importance of resource and predation limitation at different trophic levels?A field study in the northern Baltic Sea showed that dominating protozoa, flagellates and ciliates, increased with increasing primary productivity from north to south. LÄS MER