Fant 10468 publikasjoner. Viser side 256 av 419:
2025
2015
2012
Plastic pollution is an ever-growing concern around the globe, with current research portraying the presence of contaminants even in previously pristine regions. Especially small particles, micro- and nanoplastics, can be dispersed over long stretches by atmospheric transport, reaching even the most remote areas of the planet. This study aims to portray current levels of nanoplastic contamination (< 1 μm) by analyzing snow samples from high-altitude glaciers in the European Alps (2300–3800 m) via TD-PTR-MS. We were able to detect six common plastic pollutants, with PE and PP contributing over 60% of the total mass concentration measured across all sites. On average, nanoplastic concentrations of 85 ng mL − 1 (range: 3.6 ± 12 ng mL − 1 – 470 ± 76 ng mL − 1 ) were detected at sampled glacier surfaces. Access to these remote regions was enabled through a citizen-science initiative, involving trained mountaineers for sample collection. The results were applied to atmospheric modelling, highlighting possible point sources of contamination. While agriculture and local plastic factories were revealed as potential sources of nanoplastics, spatial and temporal limitations complicated comparison inside the sample cluster.
2026
2019
2019
2019
Nanotechnology has enabled the discovery of a multitude of novel materials exhibiting unique physicochemical (PChem) properties compared to their bulk analogues. These properties have led to a rapidly increasing range of commercial applications; this, however, may come at a cost, if an association to long-term health and environmental risks is discovered or even just perceived. Many nanomaterials (NMs) have not yet had their potential adverse biological effects fully assessed, due to costs and time constraints associated with the experimental assessment, frequently involving animals. Here, the available NM libraries are analyzed for their suitability for integration with novel nanoinformatics approaches and for the development of NM specific Integrated Approaches to Testing and Assessment (IATA) for human and environmental risk assessment, all within the NanoSolveIT cloud-platform. These established and well-characterized NM libraries (e.g. NanoMILE, NanoSolutions, NANoREG, NanoFASE, caLIBRAte, NanoTEST and the Nanomaterial Registry (>2000 NMs)) contain physicochemical characterization data as well as data for several relevant biological endpoints, assessed in part using harmonized Organisation for Economic Co-operation and Development (OECD) methods and test guidelines. Integration of such extensive NM information sources with the latest nanoinformatics methods will allow NanoSolveIT to model the relationships between NM structure (morphology), properties and their adverse effects and to predict the effects of other NMs for which less data is available. The project specifically addresses the needs of regulatory agencies and industry to effectively and rapidly evaluate the exposure, NM hazard and risk from nanomaterials and nano-enabled products, enabling implementation of computational ‘safe-by-design’ approaches to facilitate NM commercialization.
2020
2015
2006
Nasjonalt beregningsverktøy - AP5. Tettsteder og industri, datainnsamling og validering av forenklet metode. NILU rapport
Rapporten gir en oversikt over datainnsamling og validering i forbindelse med utvikling av forenklet metode for beregning av konsentrasjoner. Validering av prosentilverdier for døgnmiddelkonsentrasjoner viser så stor usikkerhet at det anbefales å ikke videreutvikle konseptet. Det anbefales å isteden utvide konseptet for modellering i AP4 suksessivt.
2016
Nasjonalt beregningsverktøy - AP5. Tettsteder og industri, metodebeskrivelse. NILU OR
Rapporten gir en teknisk beskrivelse av metoden og identifiserer de produktene som skal utvikles under AP5 (forenklet modellering, tettsteder og industri) som et første steg mot implementering, testing og validering av systemet.
2015