Sökning: "Mechanisms of formation"

Visar resultat 1 - 5 av 1521 avhandlingar innehållade orden Mechanisms of formation.

  1. 1. The dynamics of policy formation : making sense of feelings of public unsafety

    Författare :Monika Persson; Jan Olsson; Erik Amnå; Rolf Lidskog; Elin Wihlborg; Örebro universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Policy formation; wicked problems; sensemaking; safety; unsafety; fear of crime; policy change; discourse; ideas; interpretive; policy transfer; Political Science; Statskunskap;

    Sammanfattning : Every policy problem has inherent value dimensions. It is on the basis of values that a state of affairs is perceived as undesirable, and thus acknowledged as a problem. This makes the process of defining and negotiating the meaning of a problem an essentially political process. LÄS MER

  3. 2. Dynamics of the Bacterial Genome : Rates and Mechanisms of Mutation

    Författare :Sanna Koskiniemi; Dan Andersson; Diarmaid Hughes; Ivan Matic; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; bacteria; bacterial evolution; genome reduction; gene loss; serial passage; DNA homology; tranlesion DNA polymerase; stress; Microbiology; Mikrobiologi; Bacteriology; Bakteriologi; Evolutionary Genetics; Evolutionär genetik; Mikrobiologi; Microbiology;

    Sammanfattning : Bacterial chromosomes are highly dynamic, continuously changing with respect to gene content and size via a number of processes, including deletions that result in gene loss. How deletions form and at what rates has been the focus of this thesis. In paper II we investigated how chromosomal location affects chromosomal deletion rates in S. LÄS MER

  4. 3. Mechanisms of alloxan diabetogenicity

    Författare :Kjell Grankvist; Inge-Bert Täljedal; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Alloxan; catalase; experimental diabetes; free radicals; islets of Langerhans; rubidium accumulation; superoxide dismutase; Trypan Blue;

    Sammanfattning : Suspensions of pancreatic islet cells from ob/ob-mice were incubated with Trypan Blue. Microscope photometry showed that apparently viable cells excluded the dye completely, whereas the nuclei of non-viable cells accumulated Trypan Blue by a saturable process. LÄS MER

  5. 4. Mechanisms of cell diversification

    Författare :Christopher Winston Uhde; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Cell identity and function is determined by the intrinsic wiring of the gene regulatory network that endows progenitors with the competence to respond appropriately to extrinsic cues in a spatiotemporally-dependent manner. One such class of cues, morphogens, instruct cells in their identity by virtue of a concentration gradient, but how this is interpreted at gene regulatory levels to result in sharp and robust boundaries of gene expression is poorly understood. LÄS MER

  7. 5. Mechanisms of Metal Dusting

    Författare :Peter Szakálos; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; metal dusting; mechanism; driving force; kinetics; high temperature corrosion; carburization; stainlesssteel; Ni-base alloys; iron; alumina formers; FeCrAl; oxidation; carbon nanotubes; discontinuous precipitation; Materials science; Teknisk materialvetenskap;

    Sammanfattning : The primary intention with this Doctoral thesis is to fillin the knowledge gaps and raise the level of understandingregarding the different metal dusting mechanisms in general andexplain the process in detail for high alloyed materials.Considerable effort is put into identifying the driving forcesand elucidating the diffusional processes in metal dusting. LÄS MER