Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2009
Sammendrag
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Sammendrag
Due to the exponential increase in production of engineered nanomaterials, concerns are raised about their inevitable spreading and fate in the environment. In this study we examined the uptake and excretion kinetics of cobalt and silver nanoparticles (NPs) in Eisenia fetida, as well as their internal distribution within earthworms. We hypothesised that the uptake, retention time and internal distribution of cobalt and silver depend on their speciation, i.e. whether they are absorbed as ions or nanoparticles. Nanoparticles were subjected to neutron activation prior to the experiment, in order to facilitate tracing and quantification in earthworms by gamma counting and autoradiography. Ions and NPs were added to the food, horse manure (HM). The treatments were Co2+ 0.70 µg/kg HM, CoNP 0.69 mg/kg HM, Ag+ 0.54 mg/kg HM, AgNP 0.45 mg/kg HM, and control. The experiment followed the OECD guidelines, with one month uptake and two months excretion for silver treatments, and four months excretion for cobalt treatments. The patterns of accumulation were highly different for cobalt and silver. The concentration ratios (Bq/g worm / Bq/g food) after one month uptake were 0.93 ± 0.36 and 2.02 ± 0.65 for CoNP and Co2+ respectively, and almost all absorbed CoNP and Co2+ remained within the worms after 4 months excretion. The Ag concentration ratios after one month uptake were 0.015 ± 0.016 and 0.054 ± 0.024 for AgNP and Ag+ respectively, with a subsequent excretion of almost all AgNP and Ag+ within a few days. In addition to information on uptake and excretion kinetics, gamma counting on individual organs, coupled to autoradiography on worm transects gave information on distribution of cobalt and silver NPs within the body, and the target organs for these NPs.
Forfattere
Håkon BorchSammendrag
This poster presents a new low cost model for modelleing phosphorus and soil loss from agriculture land, and to do evaluation of different mitigation scenarios where the cost effectiveness of the meassures influence each other. The model has been used in several Norwegian catchments to evaluate mitigation options, and to build packages of measures to comply with the demands from the European Water Framework Directive.
Sammendrag
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Forfattere
Marianne Bechmann Anja Skiple Ibrekk Are Pedersen Einar Dahl Knut Bjørn Stokke Carolina Bjørn Sissel Hovik Gunnhild Riise Morten Edvardsen Nils Roar Sælthun Tom Andersen Rolf David Vogt Tone Jøran Oredalen Odd Terje Sandlund Atle Dagestad Bent BraskerudRedaktører
Anne Lyche Solheim Ann Kristin Schartau Håkon ThaulowSammendrag
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Sammendrag
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Forfattere
Johannes Deelstra Sigrun Hjalmarsdottir Kværnø Kirsti Granlund Antanas Sigitas Sileika Kazimieras Gaigalis Katarina Kyllmar Nils VagstadSammendrag
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Sammendrag
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Sammendrag
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Forfattere
F. Bouraoui B. Grizzetti G. Adelsköld H. Behrendt I. de Miguel M. Silgram S. Gómez K. Granlund L. Hoffmann B. Kronvang Sigrun Hjalmarsdottir Kværnø A. Lázár M. Mimikou G. Passarella P. Panagos H. Reisser B. Schwarzl C. Siderius A.S. Sileika A.A.M.F.R. Smit R. Sugrue M. VanLiedekerke J. ZaloudikSammendrag
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