Blar i NTNU Open på forfatter "Jenssen, Bjørn Munro"
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Combined effects of elevated CO2 and food limitation on early life stages of Clanus finmarchicus
Østebrøt, Embla Oddvarsdotter (Master thesis, 2014)The early life stages of Calanus finmarchicus were exposed to two levels of pCO2, 380 ppm (control) and 2080 ppm (elevated CO2) and two different food concentrations, ~ 600 µg C/L (high food concentration) and ~150 µg C/L ... -
Combined effects of elevated CO2 and food limitation on early life stages of Clanus finmarchicus
Østebrøt, Embla Oddvarsdotter (Master thesis, 2014)The early life stages of Calanus finmarchicus were exposed to two levels of pCO2, 380 ppm (control) and 2080 ppm (elevated CO2) and two different food concentrations, ~ 600 µg C/L (high food concentration) and ~150 µg C/L ... -
Combined effects of exposure to engineered silver nanoparticles and the water-soluble fraction of crude oil in the marine copepod Calanus finmarchicus
Farkas, Julia; Cappadona, V; Olsen, Anders Johny; Hansen, Bjørn Henrik; Posch, Wilfried; Ciesielski, Tomasz Maciej; Goodhead, Rhys; Wilflingseder, Doris; Blatzer, M; Altin, Dag; Moger, Julian; Booth, Andrew; Jenssen, Bjørn Munro (Peer reviewed; Journal article, 2020)While it is likely that ENPs may occur together with other contaminants in nature, the combined effects of exposure to both ENPs and environmental contaminants are not studied sufficiently. In this study, we investigated ... -
Combined Effects of Persistent Organic Pollutants and Biological Variables on Vitamin D in Polar Bears
Grønning, Hege Mentzoni (Master thesis, 2013)Because of long-range transport, the Arctic is chronically exposed to persistent organic pollutants (POPs), such as polychlorinated biphenyls (PCBs), pesticides and brominated flame retardants, such as polybrominated flame ... -
Combined Effects of Titanium Dioxide Nanoparticles (TiO2NPs) and Benzo(a)pyrene (B(a)P) on Hemocyte Cells and NADPH Cytochrome C Reductase Activity in Blue Mussels (Mytilus edulis)
Bergum, Signe (Master thesis, 2013)Nanotechnology is currently one of the fastest growing industries. Titanium dioxide nanoparticles (TiO2NPs) are estimated to be one of the main produced engineered nanoparticles (ENPs) in the world today, and production ... -
Comparison of the Composition of Chemical Elements in the Liver of Ringed Seal (Phoca hispida) from three different populations
Hellstrøm, Kaja Cecilie (Master thesis, 2012)The ringed seal (Phoca hispida) is a circumpolar Arctic species, with several subspecies and populations. One subspecies, Phoca hispida botnica, is found in the Baltic Sea. Large ecological differences between these regions ... -
Competitive Binding of Persistent Organic Pollutants to the Thyroid Hormone Transport Protein Transthyretin in Glaucous Gull (Larus hyperboreus).
Mortensen, Åse-Karen (Master thesis, 2015)The glaucous gull (Larus hyperboreus) is one of the largest avian top predators in the Arctic. High levels of persistent organic pollutants (POPs) and their metabolites have been detected in the glaucous gull, and several ... -
Concentrations of selected chemical elements in organs and tissues of polar bears (Ursus maritimus) from East Greenland
Uba, Ikenna (Master thesis, 2013)Polar bears from Greenland are exposed to various chemical contaminants e.g. POPs and chemical elements, which are ingested by feeding on contaminated marine mammals, e.g. ringed seals. This study analyses the concentration ... -
Concentrations of vitamin A, E, thyroid and testosterone hormones in blood plasma and tissues from emaciated adult male Arctic foxes (Vulpes lagopus) dietary exposed to persistent organic pollutants (POPs)
Rogstad, Tonje Waterloo; Sonne, Christian; Villanger, Gro Dehli; Ahlstrøm, Øystein; Fuglei, Eva; Muir, Derek C.G.; Jørgensen, Even Hjalmar; Jenssen, Bjørn Munro (Journal article; Peer reviewed, 2017)The aim of the present study was to investigate the relationships and effects of oral POP exposure on retinol (vitamin A), α-tocopherol (vitamin E), thyroid hormones and testosterone in emaciated adult farmed Arctic foxes. ... -
Contamination in an Arctic Environment: Abiotic and Biotic Impacts of Local Pollution
Beitveit, Gina Mariell (Master thesis, 2016)The aim of the present investigation was to evaluate whether Longyearbyen coal power plant and Gruve 6 have a significant impact on the chemical element distribution in soil and terrestrial biota in Adventdalen. Soil, ... -
Current state of knowledge on biological effects from contaminants on arctic wildlife and fish
Dietz, Rune; Letcher, Robert J.; Desforges, Jean-Pierre; Eulaers, Igor; Sonne, Christian; Wilson, Simon; Andersen-Ranberg, Emilie; Basu, Niladri; Barst, Benjamin D.; Bustnes, Jan Ove; Bytingsvik, Jenny; Ciesielski, Tomasz Maciej; Drevnick, Paul E.; Gabrielsen, Geir W.; Haarr, Ane; Hylland, Ketil; Jenssen, Bjørn Munro; Levin, Milton; McKinney, Melissa A.; Nørregaard, Rasmus Dyrmose; Pedersen, Kathrine E.; Provencher, Jennifer; Styrishave, Bjarne; Tartu, Sabrina; Aars, Jon; Ackerman, Joshua T.; Rosing-Asvid, Aqqalu; Barrett, Rob; Bignert, Anders; Born, Erik W; Branigan, Marsha; Braune, Birgit; Bryan, Colleen E; Dam, Maria; Eagles-Smith, Collin A.; Evans, Marlene; Evans, Thomas J.; Fisk, Aaron T.; Gamberg, Mary; Gustavson, Kim; Hartman, C. Alex; Helander, Björn; Herzog, Mark P.; Hoekstra, Paul F.; Houde, Magali; Hoydal, Katrin; Jackson, Allyson K.; Kucklick, John; Lie, Elisabeth; Loseto, Lisa; Mallory, Mark L.; Miljeteig, Cecilie; Mosbech, Anders; Muir, Derek C.G.; Nielsen, Sanna Túni; Peacock, Elizabeth; Pedro, Sara; Peterson, Sarah H.; Polder, Anuschka; Rigét, Frank F.; Roach, Pat; Saunes, Halvor; Sinding, Mikkel Holger Strander; Skåre, Janneche Utne; Søndergaard, Jens; Stenson, Garry; Stern, Gary; Treu, Gabriele; Schuur, Stacy S.; Víkingsson, Gísli Arnór (Journal article; Peer reviewed, 2019)Since the last Arctic Monitoring and Assessment Programme (AMAP) effort to review biological effects of the exposure to organohalogen compounds (OHCs) in Arctic biota, there has been a considerable number of new Arctic ... -
Detection of trace elements in Svalbard reindeer (Rangifer tarandus platyrhynchus) faeces in Longyearbyen, Adventdalen and Kapp Linné
Røed, Susanne Brix (Master thesis, 2018)The Arctic is considered a deposition and accumulation region for several possible toxic pollutions, including toxic non-essential elements, that can enter the Arctic environment via long-range transport from other ... -
Determination of Occurrence of Phthalate Metabolites in Harbour Porpoises from the Norwegian Coast
Rian, May Britt (Master thesis, 2019)Ftalater har mottatt betydelig oppmerksomhet grunnet høyt potensial for miljøforurensning og skadelige helseeffekter hos levende organismer. Forekomst av ftalatmetabolitter er godt etablert hos mennesker, men er i liten ... -
Determination of steroid hormones in grey seal (Halichoerus grypus) blood plasma using convergence chromatography tandem mass spectrometry
Sait, Shannen Thora Lea; Surviliene, Vaida; Jüssi, Mart; Gonzalez, Susana Villa; Ciesielski, Tomasz Maciej; Jenssen, Bjørn Munro; Asimakopoulos, Alexandros (Peer reviewed; Journal article, 2023)A hybrid solid phase extraction (HybridSPE) protocol tailored to ultra-performance convergence chromatography tandem mass spectrometry (UPC2-MS/MS) was developed for the determination of 19 steroid hormones in grey seal ... -
Diet and metabolic state are the main factors determining concentrations of perfluoroalkyl substances in female polar bears from Svalbard
Tartu, Sabrina; Bourgeon, Sophie; Aars, Jon; Andersen, Magnus; Lone, Karen; Jenssen, Bjørn Munro; Polder, Anuschka; Thiemann, Gregory W.; Torget, Vidar; Welker, Jeffrey Martin; Routti, Heli Anna Irmeli (Journal article; Peer reviewed, 2017)Perfluoroalkyl substances (PFASs) have been detected in organisms worldwide, including Polar Regions. The polar bear (Ursus maritimus), the top predator of Arctic marine ecosystems, accumulates high concentrations of PFASs, ... -
Dispersibility and dispersion stability of carbon nanotubes in synthetic aquatic growth media and natural freshwater
Glomstad, Berit; Zindler, Florian; Jenssen, Bjørn Munro; Booth, Andy (Journal article; Peer reviewed, 2018)The dispersion behavior of carbon nanotubes (CNTs) is influenced by both their physicochemical properties and by the aqueous media properties (e.g. ionic strength, presence of divalent cations and natural organic matter) ... -
Dispersion Characterization of Carbon Nanotubes in Freshwater Media and Implications of their Adsorption Behavior for the Bioavailability and acute Toxicity of Phenanthrene in Daphnia magna.
Zindler, Florian (Master thesis, 2015)To ensure the reproducibility of studies with engineered nanomaterials (ENMs) and to be able to evaluate the study outcomes properly, the state of the investigated ENMs dispersions needs to be characterized. In the course ... -
Disruptive Effects of Organohalogenated Contaminants on Thyroid Hormone Levels in Glaucous Gulls (Larus hyperboreus) breeding in Kongsfjorden, Svalbard
Melnes, Marte (Master thesis, 2014)The glaucous gull (Larus hyperboreus) is a predator and scavenger occupying an upper position in the arctic marine food web. This species is exposed to high levels of a variety of anthropogenic pollutants thought to cause ... -
Dissimilar effects of organohalogenated compounds on thyroid hormones in glaucous gulls
Melnes, Marte; Gabrielsen, Geir W; Herzke, Dorte; Sagerup, Kjetil; Jenssen, Bjørn Munro (Journal article; Peer reviewed, 2017)The glaucous gull (Larus hyperboreus) is an arctic top predator and scavenger exposed to high levels of mixtures of organohalogenated contaminants (OHCs) of which many interfere with the thyroid hormone (TH) system. In the ... -
Distribution and maternal transfer of arsenic, cadmium, mercury, lead and selenium in Baikal seals (Phoca sibirica)
Li, Jiawen (Master thesis, 2013)Concentrations of arsenic, cadmium, mercury, lead and selenium were determined in the muscles, brains, adrenal and thyroid glands, gonads, livers, kidneys and hair of pups and adult females of Baikal seals. Low concentrations ...