Blar i forfatter "Edvinsen, Guro Kristine"

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    • Antibakteriell aktivitet i vev fra Paralithodes camtschatica (kongekrabbe) og Lithodes maja (trollkrabbe): en sammenligning av to ulike ekstraksjonsmetoder 

      Edvinsen, Guro Kristine (Master thesis; Mastergradsoppgave, 2008-05-29)
      Forskjellige vev fra to krepsdyrarter, Paralithodes camtschatica og Lithodes maja, ble testet for antibakteriell aktivitet. Frysetørkede prøver ble ekstrahert med to forskjellige ekstraksjonsmetoder, løsemiddelekstraksjon (60 % Acetonitril + 0,1 % Trifluoreddiksyre) og syreekstraksjon (20 % eddiksyre) og videre ekstrahert og konsentrert ved fast fase ekstraksjon (SPE). Proteinkonsentrasjonen i ...

    • Contrasting survival and physiological responses of sub-Arctic plant types to extreme winter warming and nitrogen 

      Bokhorst, Stef; Jaakola, Laura; Karppinen, Katja; Edvinsen, Guro Kristine; Mæhre, Hanne Kirsti; Bjerke, Jarle W. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-21)
      Evergreen plants are more vulnerable than grasses and birch to snow and temperature variability in the sub-Arctic. Most Arctic climate impact studies focus on single factors, such as summer warming, while ecosystems are exposed to changes in all seasons. Through a combination of field and laboratory manipulations, we compared physiological and growth responses of dominant sub-Arctic plant types to ...

    • Fatty Acid Composition of the Lipids from Atlantic Salmon—Comparison of Two Extraction Methods without Halogenated Solvents 

      Nechev, Jordan; Edvinsen, Guro Kristine; Eilertsen, Karl-Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-01)
      The scope of this paper was to apply two recently developed methods for lipid extraction: the methyl tert-butyl ether (MTBE) method and the BUME method. These two methods do not include halogenated solvents, which makes them less hazardous to the environment, less toxic, and needed in less volume compared to the standard methods for lipid extraction. Fatty acid composition of the lipids from Atlantic ...

    • Heat treatment increases the protein bioaccessibility in the red seaweed dulse (Palmaria palmata), but not in the brown seaweed winged kelp (Alaria esculenta) 

      Mæhre, Hanne K; Edvinsen, Guro Kristine; Eilertsen, Karl-Erik; Elvevoll, Edel Oddny (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-04-25)
      Bioaccessibility of plant proteins has been shown to be inferior to that of proteins of animal origin. Heat treatment has been shown to positively affect this in some plants. The aim of this study was to investigate the effect of heat treatment on bioaccessibility of seaweed proteins. An in vitro gastrointestinal digestion model was used for evaluation of potential effects on the brown seaweed Alaria ...

    • Impact of Multiple Ecological Stressors on a Sub-Arctic Ecosystem: No Interaction Between Extreme Winter Warming Events, Nitrogen Addition and Grazing 

      Bokhorst, Stef; Berg, Matty P.; Edvinsen, Guro Kristine; Ellers, Jacintha; Heitman, Amber; Jaakola, Laura; Mæhre, Hanne K; Phoenix, Gareth K.; Tømmervik, Hans; Bjerke, Jarle W. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-30)
      Climate change is one of many ongoing human-induced environmental changes, but few studies consider interactive effects between multiple anthropogenic disturbances. In coastal sub-arctic heathland, we quantified the impact of a factorial design simulating extreme winter warming (WW) events (7 days at 6–7∘C) combined with episodic summer nitrogen (+N) depositions (5 kg N ha-1) on plant winter physiology, ...

    • Nutritional value and storage stability in commercially produced organically and conventionally farmed Atlantic salmon (Salmo salar L.) in Norway 

      Esaiassen, Margrethe; Jensen, Tonje Kristin; Edvinsen, Guro Kristine; Otnæs, Carina H.A.; Ageeva, Tatiana Nikolaevna; Mæhre, Hanne K (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-16)
      Salmon feeds have changed over the years, leading to changed biochemical composition of the fish. The main aim of this study was to compare biochemical compositions and storage stability of commercially produced organic and conventional salmon. Organically (n = 40) and conventionally farmed salmon (n = 39) were sampled. The fish were anesthetized, killed by gill cutting and bled before filleting. ...

    • A simple method to isolate fatty acids and fatty alcohols from wax esters in a wax-ester rich marine oil 

      Schots, Pauke C.; Edvinsen, Guro Kristine; Olsen, Ragnar Ludvig (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-12)
      Calanus finmarchicus is one of the most important zooplankton species in the North Atlantic. The zooplankton is currently being harvested and industrially processed to a marine oil product for human consumption as a marine nutraceutical containing long-chain omega-3 polyunsaturated fatty acids. This oil is very rich in wax esters, a lipid class where fatty acids are esterified to long chain fatty ...