Blar i NIVA Open Access Archive på forfatter "Tollefsen, K."
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Biomarkers in monitoring - a review
Hylland, K.; Ruus, A.; Børseth, J.F.; Bechmann, R.; Barsiene, J.; Grung, M.; Tollefsen, K.; Myhre, L.P. (NIVA-rapport;5205, Research report, 2006)Biological effects are increasingly used to monitor impacts of contaminants in marine ecosystems. Biomarkers have been defined as ”biochemical, cellular, physiological or behavioural variations in the tissue or body fluids ... -
Determination of the bioaccumulation and elimination of sucralose in the zebrafish, Danio Rerio
Lillicrap, A.; Langford, K.; Brooks, S.; Tollefsen, K. (NIVA-rapport;5865, Research report, 2009)The bioaccumulation and subsequent elimination of sucralose in zebrafish (Danio rerio) was determined using a 48 hour semi static exposure system followed by 48 hours flow through of clean water for the depuration phase. ... -
Determination of the bioaccumulation of sucralose un the freshwater alga, Pseudokirchneriella subcapitata
Lillicrap, A.; Langford, K.; Brooks, S.; Tollefsen, K. (NIVA-rapport;5864, Research report, 2009)The bioaccumulation of sucralose in the freshwater alga Pseudokirchneriella subcapitata was determined using a 48 hour static exposure system. Two exposure concentrations (10 and 100 mg/L) plus an appropriate control were ... -
Determination of the bioconcentration faction of sucralose in the crustacean Daphina magna
Lillicrap, A.; Langford, K.; Brooks, S.; Tollefsen, K. (NIVA-rapport;5866, Research report, 2009) -
Initial environmental risk assessment of combined effects of plant protection products in six different areas in Norway
Petersen, K.; Stenrød, Marianne; Tollefsen, K. (NIVA-rapport;6588, Research report, 2013)The combined effect of plant protection products (PPPs) in Norwegian streams, rivers and shallow ground water was assessed for the potential risk to non-target organisms by cumulative risk assessment. Risk quotients were ...