Blar i forfatter "Johnsen, Hanne Risan"

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    • Analysis of processes at the haustorial interfaces between Cuscuta reflexa and its hosts 

      Johnsen, Hanne Risan (Doctoral thesis; Doktorgradsavhandling, 2014-08-27)
      The genus Cuscuta comprises a group of holoparasitic dicotyledonous angiosperms that cause damage to many economically important crops. Parasitic plants form physical and physiological connections (haustoria) with the parenchyma and vascular vessels of compatible host plants. These connections provide them with water, mineral nutrients and organic compounds. Over time, this life style has led to ...

    • Cellulase activity screening using pure carboxymethylcellulose: Application to soluble cellulolytic samples and to plant tissue prints. 

      Johnsen, Hanne Risan; Krause, Kirsten (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      Reliable, rapid and inexpensive detection of cellulolytic enzymes that can be used for a wide variety of biological and environmental samples are currently in high demand. Here, a new cellulase detection protocol is described that circumvents problems observed with popular agar-based methods by exploiting the ability of carboxymethylcellulose (CMC) to form gel-like surfaces on its own. These pure ...

    • The substrate specificities and physiological function of the Toxoplasma gondii apicoplast phosphate translocator 

      Johnsen, Hanne Risan (Master thesis; Mastergradsoppgave, 2009-05-15)
      The apicomplexan parasites including the causative agents of malaria (Plasmodium spp.) and toxoplasmosis (Toxoplasma gondii) are running the risk of developing resistance to existing drugs. Members of the phylum Apicomplexa harbour a relict plastid, the apicoplast, which show homology to the chloroplasts of plants and algae. The apicoplast appears to be indispensable to the parasites, and due to its ...