Blar i NIVA Open Access Archive på forfatter "Tollefsen, Knut Erik"
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Release of chitobiase as an indicator of potential molting disruption in juvenile Daphnia magna exposed to the ecdysone receptor agonist 20-hydroxyecdysone
Song, You; Evenseth, Linn Mari; Iguchi, Taisen; Tollefsen, Knut Erik (Journal article; Peer reviewed, 2017)During arthropod molting, the old exoskeleton is degraded and recycled by the molting fluid. Chitobiase, a major chitinolytic enzyme in the molting fluid, has been widely used as a biomarker to indicate endocrine disruption ... -
Sensitivity of the green algae Chlamydomonas reinhardtii to gamma radiation: Photosynthetic performance and ROS formation
Gomes, Tania; Xie, Li; Brede, Dag Anders; Lind, Ole Christian; Solhaug, Knut Asbjørn; Salbu, Brit; Tollefsen, Knut Erik (Journal article; Peer reviewed, 2017)The aquatic environment is continuously exposed to ionizing radiation from both natural and anthropogenic sources, making the characterization of ecological and health risks associated with radiation of large importance. ... -
Toxicity of organic compounds from unresolved complex mixtures (UCMs) to primary fish hepatocytes
Petersen, Karina; Hultman, Maria T; Rowland, Steven J.; Tollefsen, Knut Erik (Journal article; Peer reviewed, 2017)Many environmental matrices contaminated with organic pollutants derived from crude oil or degraded petroleum contain mixtures so complex that they are typically unresolved by conventional analytical techniques such as gas ... -
Transcriptional changes in Atlantic salmon (Salmo salar) after embryonic exposure to road salt
Tollefsen, Knut Erik; Song, You; Kleiven, Merethe; Mahrosh, Urma; Meland, Sondre; Rosseland, Bjørn Olav; Teien, Hans-Christian (Journal article; Peer reviewed, 2015)Road salt is extensively used as a deicing chemical in road maintenance during winter and has in certain areas of the world led to density stratifications in lakes and ponds, and adversely impacted aquatic organisms in the ... -
Transcriptomic analysis reveals dose-dependent modes of action of benzo(a)pyrene in polar cod (Boreogadus saida)
Song, You; Nahrgang, Jasmine; Tollefsen, Knut Erik (Journal article; Peer reviewed, 2019)Polar cod (Boreogadus saida) has been used as a model Arctic species for hazard assessment of environmental stressors such as polycyclic aromatic hydrocarbons (PAHs). However, most of the PAH studies using polar cod rely ... -
Whole-Organism Transcriptomic Analysis Provides Mechanistic Insight into the Acute Toxicity of Emamectin Benzoate in Daphnia magna
Song, You; Rundberget, Thomas; Evenseth, Linn Mari; Xie, Li; Gomes, Tania; Høgåsen, Tore; Iguchi, Taisen; Tollefsen, Knut Erik (Journal article; Peer reviewed, 2016)Emamectin benzoate (EMB) is an antisea lice chemical widely used in the aquaculture that may also unintentionally affect nontarget crustaceans in the environment. Although the adverse effects of this compound are well ...