Sökning: "passive regulation"

Visar resultat 1 - 5 av 49 avhandlingar innehållade orden passive regulation.

  1. 1. On Nogo signaling regulation

    Författare :Alexandra Trifunovski; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Nogo; Nogo receptor; regulation; neurotrophin; Lingo-1; p75NTR; Troy; synaptic plasticity;

    Sammanfattning : As neuronal development enters its final stages, axon growth becomes restricted. This lack of regenerative capacity is partly due to the non-permissive environment of growth inhibitory proteins. Three such proteins, Nogo, OMgp and MAG bind to the same receptor, the Nogo receptor (NgR) and induce growth cone collapse and axon growth inhibition. LÄS MER

  3. 2. Contaminated sediments: Methods to assess release and toxicity of organic chemical mixtures

    Författare :Lukas Mustajärvi; Anna Sobek; Jarkko Akkanen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sediment; Hydrophobic organic contaminants; Flux; Bioturbation; Passive sampling; Passive dosing; Mixture toxicity; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : Bottom sediments around the world store large amounts of legacy hydrophobic organic contaminants (HOCs), forming mixtures of unknown chemical composition. Primary emissions to the environment of many HOCs have been reduced as a consequence of regulation. LÄS MER

  4. 3. The Importance of a Fifth Element in Transcription: Transcriptional Discrimination in Escherichia coli

    Författare :Bertil Gummesson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Escherichia coli; RNA polymerase; ppGpp; DksA; stringent response; passive regulation;

    Sammanfattning : Upon growth arrest of the bacterium Escherichia coli, RNA polymerase (Es70) is redirected from transcribing genes encoding the protein synthesizing system (PSS) to those involved in maintenance and stress resistance. The small nucleotide ppGpp, which is directly targeting Es70, is a key regulatory molecule required for this response. LÄS MER

  5. 4. Modulation of B cell access to antigen by passively administered antibodies : an explanation for antibody feedback regulation?

    Författare :Hui Xu; Birgitta Heyman; Helena Harris; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; IgG; IgG3; IgE; suppression; enhancement; epitope masking; antigen transport; antigen presentation; follicular B cells; marginal zone B cells; Immunologi; Immunology;

    Sammanfattning : Antibody responses can be up- or down-regulated by passive administration of specific antibody together with antigen. Depending on the structure of the antigen and the antibody isotype, responses can be completely suppressed or enhanced up to a 1000-fold of what is seen in animals immunized with antigen alone. LÄS MER

  7. 5. Protection against cold in prehospital trauma care

    Författare :Otto Henriksson; Ulf Björnstig; Tore Vikström; Peter Naredi; Hannu Rintamäki; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Hypothermia; prehospital trauma care; emergency medical services; passive warming; thermal insulation; heat loss; body temperature regulation; kirurgi; Surgery;

    Sammanfattning : Background: Protection against cold is vitally important in prehospital trauma care to reduce heat loss and prevent body core cooling. Objectives: Evaluate the effect on cold stress and thermoregulation in volunteer subjects byutilising additional insulation on a spineboard (I). LÄS MER