Sökning: "Co-evolution"

Visar resultat 21 - 25 av 48 avhandlingar innehållade ordet Co-evolution.

  1. 21. Molecular mechanisms in actinorhizal symbioses

    Författare :Tomas Persson; Katharina Pawlowski; Helge Küster; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plant Physiology; växtfysiologi;

    Sammanfattning : The symbiosis between the nitrogen fixing acinobacterium Frankia and its actinorhizal host plant is very old and their co-evolution has shaped their niche in the environment. Nitrogen is most often the limiting element in soil, and symbiotic plants can, with the help of their micrsymbionts, compete in an efficient way. LÄS MER

  3. 22. I naturens teater : Kultur- och miljösociologiska analyser av naturhistoriska utställningar och filmer

    Författare :Anna Samuelsson; Hedvig Ekerwald; Nina Lykke; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; exhibitions; nature culture-dualism; museums of natural history; cultural environmental studies; museology; environmental sociology; deconstruction; human-animal-relations; andro- and anthropocentric stereotyping; semiotics; discourse analysis; rhetoric; display; representation; climate change.; Sociology; Sociologi; Sociologi; Sociology; Idé- och lärdomshistoria; History of Sciences and Ideas;

    Sammanfattning : This thesis is a study of constructions of reality in visual and textual representations in current exhibitions in the Swedish Museum of Natural History in Stockholm with comparisons to the Natural History Museum in Gothenburg and minor excursions to other museums. The study also includes seven giant screen films in Cosmonova: an IMAX theatre which is part of the Swedish Museum of Natural History. LÄS MER

  4. 23. Streptococcal immunoglobulin degrading enzymes of the IdeS and IgdE family

    Författare :Christian Spoerry; Ulrich von Pawel-Rammingen; Heiko Herwald; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Streptococcus; S. pyogenes; S. agalactiae; S. suis; S. porcinus; S. pseudoporcinus; S. equi subsp. zooepidemicus; protease; immunoglobulin; immune evasion; IdeS; IgdE; molekylärbiologi; Molecular Biology;

    Sammanfattning : Bacteria of the genus Streptococcus are common asymptomatic colonisers of humans and animals. As opportunistic pathogens they can however, depending on their host’s immune status and other circumstances, cause mild to very severe infections. LÄS MER

  5. 24. Evolution of Interactions Involving Intrinsically Disordered Proteins

    Författare :Emma Åberg; Per Jemth; Madan Babu; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; intrinsically disordered proteins; protein evolution; phylogenetics; ancestral sequence reconstruction; biophysical characterization; NCBD; CID; p53; MDM2; Biologi med inriktning mot molekylär evolution; Biology with specialization in Molecular Evolution; Biokemi; Biochemistry;

    Sammanfattning : This thesis describes the evolution of intrinsically disordered proteins and their interaction partners. The work presented is a combination of phylogenetic analysis, ancestral reconstruction and biophysical characterization in order to examine the evolutionary trajectory of protein-protein interactions involving disorder. LÄS MER

  7. 25. Bacteria that escape predation : waterborne pathogens and their relatives

    Författare :Karolina I. A. Eriksson; Agneta Andersson; Johanna Thelaus; Jon Ahlinder; David Sundell; Klaus Jürgens; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bacterial pathogens; protozoa; predation resistance; aquatic microbiology; climate change; opportunists; humification; iron; environmental science; miljövetenskap; mikrobiologi; Microbiology;

    Sammanfattning : The hidden presence of opportunistic bacterial pathogens in the environment evokes concerns about emerging diseases, especially in the light of climate change. The co-evolution of bacteria and their predators (protozoa) has led to bacterial defence strategies of which some contribute to the ability of bacteria to cause disease. LÄS MER