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  • 151.
    Eriksson, P
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Hansson, S
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Larsson, Eva
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Jämförelse av den i Norden allmänt använda NKB-metoden och ett påbörjat CEN-förslag vid provning av klämringkopplingars härdighet mot spänningskorrosion (Delrapport inom NORDTEST-projekt 1148-93)1995Report (Refereed)
  • 152.
    Eriksson, Peter
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Andersson, Bo-Lennart
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Börjesson, Arne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Carlsson, Bo
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Metoder för provning av elektronikkomponenter vad avser påverkan av luftföroreningar - Fallstudie avseende elektronik i trafikmiljö.1992Report (Refereed)
  • 153.
    Eriksson, Peter
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Carlsson, Bo
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Accelerated corrosion test involving alternate exposure for hostile gases, neutral salt spray and drying. SP method 24991998Report (Refereed)
  • 154.
    Esposito, M
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Polymer och fiber.
    Lausmaa, J
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Polymer och fiber.
    Surface analysis of failed oral titanium implants1999In: Journal of Biomedical Materials Research, ISSN 0021-9304, E-ISSN 1097-4636, Vol. 48, no 4, p. 559-568Article in journal (Other academic)
  • 155.
    Fadeel, Bengt
    et al.
    Karolinska Institute, Sweden.
    Fornara, Andrea
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Toprak, Muhammet S.
    KTH Royal Institute of Technology, Sweden.
    Bhattacharya, Kunal
    Karolinska Institute, Sweden.
    Keeping it real: The importance of material characterization in nanotoxicology2015In: Biochemical and Biophysical Research Communications - BBRC, ISSN 0006-291X, E-ISSN 1090-2104, Vol. 468, no 3, p. 498-503Article, review/survey (Refereed)
    Abstract [en]

    Nanomaterials are small and the small size and corresponding large surface area of nanomaterials confers specific properties, making these materials desirable for various applications, not least in medicine. However, it is pertinent to ask whether size is the only property that matters for the desirable or detrimental effects of nanomaterials? Indeed, it is important to know not only what the material looks like, but also what it is made of, as well as how the material interacts with its biological surroundings. It has been suggested that guidelines should be implemented on the types of information required in terms of physicochemical characterization of nanomaterials for toxicological studies in order to improve the quality and relevance of the published results. This is certainly a key issue, but it is important to keep in mind that material characterization should be fit-for-purpose, that is, the information gathered should be relevant for the end-points being studied.

  • 156.
    Fallqvist, Björn
    et al.
    KTH Royal Institute of Technology, Sweden.
    Fielden, Matthew L.
    KTH Royal Institute of Technology, Sweden.
    Pettersson, Torbjörn
    KTH Royal Institute of Technology, Sweden.
    Nordgren, Niklas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Kroon, Martin
    KTH Royal Institute of Technology, Sweden.
    Gad, Annica K. B.
    Karolinska Institute, Sweden.
    Experimental and computational assessment of F-actin influence in regulating cellular stiffness and relaxation behaviour of fibroblasts2016In: Journal of The Mechanical Behavior of Biomedical Materials, ISSN 1751-6161, E-ISSN 1878-0180, Vol. 59, p. 168-184Article in journal (Refereed)
    Abstract [en]

    In biomechanics, a complete understanding of the structures and mechanisms that regulate cellular stiffness at a molecular level remain elusive. In this paper, we have elucidated the role of filamentous actin (F-actin) in regulating elastic and viscous properties of the cytoplasm and the nucleus. Specifically, we performed colloidal-probe atomic force microscopy (AFM) on BjhTERT fibroblast cells incubated with Latrunculin B (LatB), which results in depolymerisation of F-actin, or DMSO control. We found that the treatment with LatB not only reduced cellular stiffness, but also greatly increased the relaxation rate for the cytoplasm in the peripheral region and in the vicinity of the nucleus. We thus conclude that F-actin is a major determinant in not only providing elastic stiffness to the cell, but also in regulating its viscous behaviour. To further investigate the interdependence of different cytoskeletal networks and cell shape, we provided a computational model in a finite element framework. The computational model is based on a split strain energy function of separate cellular constituents, here assumed to be cytoskeletal components, for which a composite strain energy function was defined. We found a significant influence of cell geometry on the predicted mechanical response. Importantly, the relaxation behaviour of the cell can be characterised by a material model with two time constants that have previously been found to predict mechanical behaviour of actin and intermediate filament networks. By merely tuning two effective stiffness parameters, the model predicts experimental results in cells with a partly depolymerised actin cytoskeleton as well as in untreated control. This indicates that actin and intermediate filament networks are instrumental in providing elastic stiffness in response to applied forces, as well as governing the relaxation behaviour over shorter and longer time-scales, respectively.

  • 157.
    Fant, Kristina
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik.
    Enhanced cellular uptake of antisecretory peptide AF-16 through proteoglycan binding2014In: Biochemistry, ISSN 0006-2960, E-ISSN 1520-4995, Vol. 53, no 41, p. 6566-6573Article in journal (Refereed)
    Abstract [en]

    Peptide AF-16, which includes the active site of Antisecretory Factor protein, has antisecretory and anti-inflammatory properties, making it a potent drug candidate for treatment of secretory and inflammatory diseases such as diarrhea, inflammatory bowel diseases, and intracranial hypertension. Despite remarkable physiological effects and great pharmaceutical need for drug discovery, very little is yet understood about AF-16 mechanism of action. In order to address interaction mechanisms, we investigated the binding of AF-16 to sulfated glycosaminoglycan, heparin, with focus on the effect of pH and ionic strength, and studied the influence of cell-surface proteoglycans on cellular uptake efficiency. Confocal laser scanning microscopy and flow cytometry experiments on wild type and proteoglycan-deficient Chinese hamster ovary cells reveal an endocytotic nature of AF-16 cellular uptake that is, however, less efficient for the cells lacking cell-surface proteoglycans. Isothermal titration calorimetry provides quantitative thermodynamic data and evidence for that the peptide affinity to heparin increases at lower pH and ionic strength. Experimental data, supported by theoretical modeling, of peptide-glycosaminoglycan interaction indicate that it has a large electrostatic contribution, which will be enhanced in diseases accompanied by decreased pH and ionic strength. These observations show that cell-surface proteoglycans are of general and crucial importance for the antisecretory and anti-inflammatory activities of AF-16. 

  • 158.
    Fant, Kristina
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik.
    Functionalization with C-terminal cysteine enhances transfection efficiency of cell-penetrating peptides through dimer formation2012In: Biochemical and Biophysical Research Communications - BBRC, ISSN 0006-291X, E-ISSN 1090-2104, Vol. 418, no 3, p. 469-474Article in journal (Refereed)
  • 159. Faure, B
    et al.
    Salazar-Alvarez, G
    Ahniyaz, Anwar
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Villaluenga, I
    Berriozabal, G
    De Miguel, YR
    Dispersion and surface functionalization of oxide nanoparticles for transparent photocatalytic and UV-protecting coatings and sunscreens2013In: Science and Technology of Advanced Materials, ISSN 1468-6996, E-ISSN 1878-5514, Vol. 14, no 2, article id 23001Article in journal (Refereed)
    Abstract [en]

    This review describes recent efforts on the synthesis, dispersion and surface functionalization of the three dominating oxide nanoparticles used for photocatalytic, UV-blocking and sunscreen applications: titania, zinc oxide, and ceria. The gas phase and liquid phase synthesis is described briefly and examples are given of how weakly aggregated photocatalytic or UV-absorbing oxide nanoparticles with different composition, morphology and size can be generated. The principles of deagglomeration are reviewed and the specific challenges for nanoparticles highlighted. The stabilization of oxide nanoparticles in both aqueous and non-aqueous media requires a good understanding of the magnitude of the interparticle forces and the surface chemistry of the materials. Quantitative estimates of the Hamaker constants in various media and measurements of the isoelectric points for the different oxide nanoparticles are presented together with an overview of different additives used to prepare stable dispersions. The structural and chemical requirements and the various routes to produce transparent photocatalytic and nanoparticle-based UV-protecting coatings, and UV-blocking sunscreens are described and discussed.

  • 160.
    Flogård, Adeline
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Influence of Cr on the oxidation behaviour of Fe3Al and Ni3Al at 500°C2002In: Oxidation of metals, Vol. 57, no 1, p. 13-31Article in journal (Other academic)
  • 161.
    Flogård, Adeline
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Oxidation behaviour of Ni3Al and Fe3Al: I. XPS calibrations of pure compounds and quantification of the results2001In: Oxidation of Metals, ISSN 0030-770X, E-ISSN 1573-4889, Vol. 56, no 6, p. 415-424Article in journal (Other academic)
  • 162.
    Flogård, Adeline
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Oxidation behaviour of Ni3Al and Fe3Al: II. Early stage of oxide growth2001In: Oxidation of Metals, ISSN 0030-770X, E-ISSN 1573-4889, Vol. 56, no 6, p. 425-452Article in journal (Other academic)
  • 163.
    Flogård, Adeline
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Thin-walled sprinkler pipes maintain their durability2008In: BrandPosten, no 38, p. 11-Article in journal (Other (popular science, discussion, etc.))
  • 164.
    Flogård, Adeline
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Tunnväggiga sprinklerrör håller2008In: BrandPosten, no 38, p. 11-Article in journal (Other (popular science, discussion, etc.))
  • 165.
    Flogård, Adeline
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Carlsson, Bo
    Ruud, Svein
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energi och Bioekonomi, Klimatisering och installationsteknik.
    Lundin, Leif
    ?.
    Rökkanaler av metall - korrosionsprovningsmetod med omväxlande förbränning av vedbränsle och lättolja2004Report (Refereed)
    Abstract [sv]

    This report presents the results of the STEM project number 11885-2. The aim of the project was to develop a corrosion test method for metal flue liners with alternating wood and oil burning. Indeed, the conditions gathered by the alternate use of wood and oil for combustion are considered to be severe for metal chimneys, because of the combination of low temperature corrosion (condensation corrosion) involving aggressive ions like chloride, corrosion promoting air pollutants as sulfur dioxide, and high temperature corrosion involving oxidation mechanisms. For the moment there exists no standard method at a European level for the testing of metal flue liners in the conditions named above. Moreover, the combination of oil and wood is becoming more and more common in private houses, especially in northern Europe (mostly Sweden and Finland). The tests performed in this project used partly light oil containing small amounts of sulfur, pellets, and a combination of pellets and light oil that was spiked with determined amounts of chloride and sulfur so that relative high concentrations of chloride and sulfur dioxide were obtained in the flue gas. In none of the six-weeks test performed corrosion could be observed on the metal flue liners of two stainless steels, namely ASTM 304 and 316 (corresponding to SS 2333 and SS 2343). Acceleration was obtained mainly by temperature cycling in that way that condensation corrosion was first initiated. Thereafter the condensate was evaporated and during this process the corrosion promoting contaminants in the condensate increased till the metal flue liner was completely dried. A condensation/drying up cycle lasted for half an hour The proposed test method, apart from having a too low acceleration factor, was found to be difficult to realize with regards to security and handling. Instead of increasing the acceleration factor by varying key parameters, which involves the risk of modifying the corrosion mechanisms compared to real conditions, another method is proposed to be developed in a future work. This unconventional and general method, developed originally by CSTB in France, is based on corrosion by condensate in controlled conditions. The method has shown promising results for some fuels, but needs further development to be used a European standard.

  • 166.
    Flogård, Adeline
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Segerdahl, Karin
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Intelligenta transportskydd2005Report (Refereed)
  • 167.
    Fornara, Andrea
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Magnetic, structural, and particle size analysis of single- and multi-core magnetic nanoparticles2014In: IEEE transactions on magnetics, ISSN 0018-9464, E-ISSN 1941-0069, Vol. 50, no 11, p. 6971714-Article in journal (Refereed)
  • 168. Forslund, M
    et al.
    Leygraf, C
    Claesson, Per M
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Pan, J
    Octadecanethiol as corrosion inhibitor for zinc and patterned Zinc-Copper in humified air with Formic Acid2014In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 161, no 6, p. C330-C338Article in journal (Refereed)
    Abstract [en]

    The corrosion inhibition efficiency of octadecanethiol (ODT) for zinc and a zinc-copper patterned model sample (Zn-Cu) has been explored during exposure in an atmosphere that mimics indoor atmospheric corrosion containing humidified air (80% relative humidity at 20◦C) and formic acid (around 100 ppb). The corrosion kinetics were monitored in situ with infrared reflection absorption spectroscopy, and the local nature of corrosion effects post-analyzed with complementary scanning electron microscopy, atomic force microscopy and confocal Raman spectroscopy. ODT shows initially a corrosion inhibiting ability both on zinc and on Zn-Cu. This ability decreases with time due to local removal of ODT, which causes micro-galvanic effects that eventually result in corrosion rates that exceed those for the uncovered samples. On bare and ODT-covered samples, the presence of a copper-zinc junction results in both accelerated corrosion and in structurally more developed corrosion products. Overall, the results suggest that ODT can function as a temporary corrosion inhibitor in representative indoor environments on zinc and zinc with zinc-copper junctions.

  • 169.
    Fray, Nicolas
    et al.
    CNRS, France; Paris Diderot University, France.
    Bardyn, Anaïs
    CNRS, France; Paris Diderot University, France; University of Orléans, France.
    Cottin, Hervé
    CNRS, France; Paris Diderot University, France.
    Altwegg, Kathrin
    University of Bern, Switzerland.
    Baklouti, Donia
    CNRS, France; University of Paris-Sud, France.
    Briois, Christelle
    CNRS, France; University of Orléans, France.
    Colangeli, Luigi
    ESTEC European Space Research and Technology Centre, Netherlands.
    Engrand, Cécile
    CNRS, France; University of Paris-Saclay, France; University of Paris-Sud, France.
    Fischer, Henning
    Max Planck Institute for Solar System Research, Germany.
    Glasmachers, Albrecht
    University of Wuppertal, Germany.
    Grün, Eberhard
    Max Planck Institute for Nuclear Physics, Germany.
    Haerendel, Gerhard
    Max Planck Institute for Extraterrestrial Physics, Germany.
    Henkel, Hartmut
    Von Hoerner und Sulger GmbH, Germany.
    Höfner, Herwig
    Max Planck Institute for Extraterrestrial Physics, Germany.
    Hornung, Klaus
    Universität der Bundeswehr, Germany.
    Jessberger, Elmar K.
    University of Münster, Germany.
    Koch, Andreas
    Von Hoerner und Sulger GmbH, Germany.
    Krüger, Harald
    Max Planck Institute for Solar System Research, Germany.
    Langevin, Yves
    CNRS, France; University of Paris-Sud, France.
    Lehto, Harry
    University of Turku, Finland.
    Lehto, Kirsi
    University of Turku, Finland.
    Le Roy, Léna
    University of Bern, Switzerland.
    Merouane, Sihane
    Max Planck Institute for Solar System Research, Germany.
    Modica, Paola
    CNRS, France; Paris Diderot University, France; University of Orléans, France.
    Orthous-Daunay, François-Régis
    CNRS, France; Université Grenoble Alpes, France.
    Paquette, John
    Max Planck Institute for Solar System Research, Germany.
    Raulin, François
    CNRS, France; Paris Diderot University, France.
    Rynö, Jouni
    Finnish Meteorological Institute, Finland.
    Schulz, Rita
    ESA European Space Agency, Netherlands.
    Silén, Johan
    Finnish Meteorological Institute, Finland.
    Siljeström, Sandra
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik.
    Steiger, Wolfgang
    RC Seibersdorf Research GmbH Business Field Aerospace Technology, Austria.
    Stenzel, Oliver
    Max Planck Institute for Solar System Research, Germany.
    Stephan, Thomas
    University of Chicago, US.
    Thirkell, Laurent
    CNRS, France; University of Orléans, France.
    Thomas, Roger
    CNRS, France; University of Orléans, France.
    Torkar, Klaus
    Austrian Academy of Sciences, Austria.
    Varmuza, Kurt
    Vienna University of Technology, Austria.
    Wanczek, Karl-Peter
    University of Bremen, Germany.
    Zaprudin, Boris
    University of Turku, Finland.
    Kissel, Jochen
    Max Planck Institute for Solar System Research, Germany.
    Hilchenbach, Martin
    Max Planck Institute for Solar System Research, Germany.
    High-molecular-weight organic matter in the particles of comet 67P/Churyumov–Gerasimenko2016In: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 538, no 7623, p. 72-74Article in journal (Refereed)
    Abstract [en]

    The presence of solid carbonaceous matter in cometary dust was established by the detection of elements such as carbon, hydrogen, oxygen and nitrogen in particles from comet 1P/Halley1, 2. Such matter is generally thought to have originated in the interstellar medium3, but it might have formed in the solar nebula—the cloud of gas and dust that was left over after the Sun formed4. This solid carbonaceous material cannot be observed from Earth, so it has eluded unambiguous characterization5. Many gaseous organic molecules, however, have been observed6, 7, 8, 9; they come mostly from the sublimation of ices at the surface or in the subsurface of cometary nuclei8. These ices could have been formed from material inherited from the interstellar medium that suffered little processing in the solar nebula10. Here we report the in situ detection of solid organic matter in the dust particles emitted by comet 67P/Churyumov–Gerasimenko; the carbon in this organic material is bound in very large macromolecular compounds, analogous to the insoluble organic matter found in the carbonaceous chondrite meteorites11, 12. The organic matter in meteorites might have formed in the interstellar medium and/or the solar nebula, but was almost certainly modified in the meteorites’ parent bodies11. We conclude that the observed cometary carbonaceous solid matter could have the same origin as the meteoritic insoluble organic matter, but suffered less modification before and/or after being incorporated into the comet.

  • 170.
    Frei, U
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Carlsson, B
    Möller, K
    Application of advanced methods for durability assessment of new absorber coatings1995In: Proceedings of the SPIE - the International Society for Optical Engineering 1995, 1995, , p. 282-290Conference paper (Other academic)
  • 171.
    Frostäng, Sten
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Carlsson, Lennart
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Högtemperaturkorrosion/erosion. NUTEK-utredning 1991.1991Report (Refereed)
  • 172.
    Försth, Michael
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Brandteknik, material (BRm).
    Möller, Kenneth
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Enhanced absorption of fire induced heat radiation in liquid droplets2013In: Fire Safety Journal, Vol. 55, p. 182-196Article in journal (Refereed)
  • 173.
    Gatara, Alexander
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Jacobsson, Johan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Metodutveckling för analys av låga halter klorgas i luft1997Report (Refereed)
  • 174.
    Ghebrai, Mehretab
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Azimi, Arman
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Örnemark, Ulf
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Comparison of two chromatographic materials for separation of strontium and rubidium in aqueous solutions1999Report (Refereed)
  • 175.
    Goetz, W.
    et al.
    Max Planck Institute for Solar System Research, Germany.
    Brinckerhoff, W. B.
    NASA, US.
    Arevalo, R.
    NASA, US.
    Freissinet, C.
    NASA, US.
    Getty, S.
    NASA, US.
    Glavin, D. P.
    NASA, US.
    Siljeström, Sandra
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik.
    Buch, A.
    Ecole Centrale Paris, France.
    Stalport, F.
    Ecole Centrale Paris, France.
    Grubisic, A.
    LISA Laboratoire Interuniversitaire des Systèmes Atmosphériques, France.
    Li, X.
    NASA, US.
    Pinnick, V.
    NASA, US.
    Danell, R.
    NASA, US.
    Van Amerom, F. H. W.
    LISA Laboratoire Interuniversitaire des Systèmes Atmosphériques, France; Danell Consulting, US.
    Goesmann, F.
    Mini-Mass Consulting, US.
    Steininger, H.
    Max Planck Institute for Solar System Research, Germany.
    Grand, N.
    Max Planck Institute for Solar System Research, Germany.
    Raulin, F.
    LISA Laboratoire Interuniversitaire des Systèmes Atmosphériques, France, France.
    Szopa, C.
    LATMOS, France.
    Meierhenrich, U.
    University of Nice, France.
    Brucato, J. R.
    INAF Astrophysical Observatory of Arcetri, Italy; University of Bremen, Germany.
    MOMA: The challenge to search for organics and biosignatures on Mars2016In: International Journal of Astrobiology, ISSN 1473-5504, E-ISSN 1475-3006, Vol. 15, no 3, p. 239-250Article in journal (Refereed)
    Abstract [en]

    This paper describes strategies to search for, detect, and identify organic material on the surface and subsurface of Mars. The strategies described include those applied by landed missions in the past and those that will be applied in the future. The value and role of ESA's ExoMars rover and of her key science instrument Mars Organic Molecule Analyzer (MOMA) are critically assessed.

  • 176.
    Granlund, Marcus
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Polymer och fiber.
    Kärnkraftsindustrin lär mer om åldring av polymerer2016In: EnerginyheterArticle in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    Under hösten samlade Energiforsks seminarium “Ageing of Polymers in nuclear applications – Education and workshop” över 35 personer från 5 olika länder för att lära och diskutera åldring av polymerer inom kärnkraft.

  • 177.
    Greenwalt, Dale E.
    et al.
    Smithsonian Institution, US.
    Rose, Tim R.
    Smithsonian Institution, US.
    Siljeström, Sandra
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor. Smithsonian Institution, US.
    Goreva, Yulia S.
    Smithsonian Institution, US.
    Constenius, Kurt N.
    Carnegie Museum of Natural History, US.
    Wingerath, Jonathan G.
    Smithsonian Institution, US.
    Taphonomic studies of the fossil insects of the Middle Eocene Kishenehn Formation2015In: Acta Palaeontologica Polonica, ISSN 0567-7920, E-ISSN 1732-2421, Vol. 60, no 4, p. 931-947Article in journal (Refereed)
    Abstract [en]

    The lacustrine oil shales of the Coal Creek Member of the Kishenehn Formation in northwestern Montana comprise a relatively unstudied Middle Eocene fossil insect locality. Herein, we detail the stratigraphic position of the fossiliferous unit, describe the insect fauna of the Coal Creek locality and document its bias towards very small but remarkably preserved insects. In addition, the depositional environment is examined and the mineral constituents of the laminations that comprise the varves of the Kishenehn oil shale are defined. Fifteen orders of insects have been recorded with the majority of all insects identified as aquatic with the families Chironomidae (Diptera) and Corixidae (Hemiptera) dominant. The presence of small aquatic insects, many of which are immature, the intact nature of >90% of the fossil insects and the presence of Daphnia ephippia, all indicate that the depositional environment was the shallow margin of a large freshwater lake. The fossil insects occur within fossilized microbial mat layers that comprise the bedding planes of the oil shale. Unlike the fossiliferous shales of the Florissant and Okanagan Highlands, the mats are not a product of diatomaceous algae nor are diatom frustules a component of the sediments or the varve structure. Instead, the varves are composed of very fine eolian siliciclastic silt grains overlaid with non-diatomaceous, possibly cyanobacteria-derived microbial mats which contain distinct traces of polyaromatic hydrocarbons. A distinct third layer composed of essentially pure calcite is present in the shale of some exposures and is presumably derived from the seasonal warming-induced precipitation of carbonate from the lake’s waters. The Coal Creek locality presents a unique opportunity to study both very small Middle Eocene insects not often preserved as compression fossils in most Konservat-Lagerstätte and the processes that led to their preservation.

  • 178.
    Gunnarsson, Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik.
    Bally, M
    Svensson, L
    Larsson, G
    Zhdanov, V P
    Hook, F
    Interaction of single viruslike particles with vesicles containing glycosphingolipids2011In: Physical Review Letters, Vol. 107, p. 188103-Article in journal (Refereed)
  • 179.
    Gunnarsson, Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik.
    Dexlin, L
    Wallin, P
    Svedhem, S
    Jönsson, P
    Wingren, C
    Höök, F
    Kinetics of Ligand Binding to Membrane Receptors from Equilibrium Fluctuation Analysis of Single Binding Events,2011In: Journal of the American Chemical Society, Vol. 133, p. 14852–14855-Article in journal (Refereed)
  • 180.
    Gunnarsson, Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik.
    Kollmer, Felix
    Sohn, Sascha
    Höök, Fredrik
    Sjövall, Peter
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Funktionella material (KMf).
    High-resolution mass spectrometry imaging of supported lipid bilayers and individual lipid vesicles2010In: Analytical Chemistry, Vol. 82, p. 2426-2433Article in journal (Refereed)
  • 181.
    Gunnarsson, Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik.
    Sjövall, Peter
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Funktionella material (KMf).
    Höök, Fredrik
    Liposome-based bio-barcodes for on-chip DNA detection using imaging mass spectrometry2010In: Nano Letters, Vol. 10, p. 732-737Article in journal (Refereed)
  • 182.
    Gustafsson, H
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Luftkvalitet och lukt från byggmaterial: Olfaktometri och erfarenheter av klimatkammarutrustningen Climpaq1997Conference paper (Other academic)
  • 183. Gustafsson, Hans
    et al.
    Rosell, Lars
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Kemi.
    Kemisk emission från golvmaterial. Undersökning av i vilken utsträckning golvmaterial avger kemiska ämnen på plats i byggnader och under laboratorieförhållanden1995Report (Refereed)
  • 184.
    Gustavsson, I
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Magnusson, J
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Återvinning av termoplaster1998Report (Refereed)
  • 185.
    Gutiérrez, Lucía
    et al.
    CSIC Spanish National Research Council, Spain.
    Costo, Rocio
    CSIC Spanish National Research Council, Spain.
    Grüttner, Cordula
    Micromod Partikeltechnologie GmbH, Germany.
    Westphal, Fritz
    Micromod Partikeltechnologie GmbH, Germany.
    Gehrke, Nicole
    NanoPET Pharma GmbH, Germany.
    Heinke, David
    NanoPET Pharma GmbH, Germany.
    Fornara, Andrea
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Pankhurst, Quentin A.
    University College of London, UK.
    Johansson, Christer
    RISE, Swedish ICT, Acreo.
    Veintemillas-Verdaguer, Sabino
    CSIC Spanish National Research Council, Spain.
    Morales, Maria del Puerto
    CSIC Spanish National Research Council, Spain.
    Synthesis methods to prepare single- and multi-core iron oxide nanoparticles for biomedical applications2015In: Dalton Transactions, ISSN 1477-9226, E-ISSN 1477-9234, Vol. 44, no 7, p. 2943-2952Article in journal (Refereed)
    Abstract [en]

    We review current synthetic routes to magnetic iron oxide nanoparticles for biomedical applications. We classify the different approaches used depending on their ability to generate magnetic particles that are either single-core (containing only one magnetic core, i.e. a single domain nanocrystal) or multi-core (containing several magnetic cores, i.e. single domain nanocrystals). The synthesis of single-core magnetic nanoparticles requires the use of surfactants during the particle generation, and careful control of the particle coating to prevent aggregation. Special attention has to be paid to avoid the presence of any toxic reagents after the synthesis if biomedical applications are intended. Several approaches exist to obtain multi-core particles based on the coating of particle aggregates; nevertheless, the production of multi-core particles with good control of the number of magnetic cores per particle, and of the degree of polydispersity of the core sizes, is still a difficult task. The control of the structure of the particles is of great relevance for biomedical applications as it has a major influence on the magnetic properties of the materials.

  • 186.
    Gårdebjer, Sofie
    et al.
    Chalmers University of Technology, Sweden.
    Andersson, M.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Life Science.
    Engström, J.
    AkzoNobel, Sweden.
    Restorp, P.
    AkzoNobel, Sweden.
    Persson, Michael
    Chalmers University of Technology, Sweden; AkzoNobel, Sweden.
    Larsson, Anette
    Chalmers University of Technology, Sweden.
    Using Hansen solubility parameters to predict the dispersion of nano-particles in polymeric films2016In: Polymer Chemistry, ISSN 1759-9954, E-ISSN 1759-9962, Vol. 7, no 9, p. 1756-1764Article in journal (Refereed)
    Abstract [en]

    We suggest a rough and straightforward method to predict the dispersibility of modified cellulose nanocrystals (CNC) in nanocomposites using Hansen solubility parameters (HSP). The surface of CNC was modified using a novel approach where Y-shaped substituents with two different carbon chain lengths were attached to the surface. Approximate HSP values were calculated for the modified CNC, and dispersions of unmodified and modified CNC in solvents with varying HSPs were studied. The best dispersibility was observed in dichloromethane, when the CNC surface was modified with longer carbon chains. Dichloromethane has HSP similar to low-density polyethylene (LDPE). Nanocomposites with both unmodified and modified CNC were produced. The materials with modified CNC showed increased adhesion between the filler and the matrix, followed by a decreased water permeability compared to unmodified CNC, suggesting a better dispersibility of modified CNC in LDPE and confirming the usefulness of this approach.

  • 187.
    Haapanen, Janne
    et al.
    Tampere University of Technology, Finland.
    Aromaa, Mikko
    Tampere University of Technology, Finland.
    Teisala, Hannu
    Tampere University of Technology, Finland.
    Tuominen, Mikko
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik. Tampere University of Technology, Finland.
    Stȩpień, Milena
    Åbo Akademi University, Finland.
    Saarinen, Jarkko J.
    Åbo Akademi University, Finland.
    Heikkilä, Mikko
    University of Helsinki, Finland.
    Toivakka, Martti
    Åbo Akademi University, Finland.
    Kuusipalo, Jurkka
    Tampere University of Technology, Finland.
    Mäkelä, Jyrki M.
    Tampere University of Technology, Finland.
    Binary TiO2/SiO2 nanoparticle coating for controlling the wetting properties of paperboard2015In: Materials Chemistry and Physics, ISSN 0254-0584, E-ISSN 1879-3312, Vol. 149, p. 230-237Article in journal (Refereed)
    Abstract [en]

    We introduce a flame based aerosol method to fabricate thin films consisting of binary TiO2/SiO2 nanoparticles deposited directly from the flame onto the paperboard. Nanocoatings were prepared with Liquid Flame Spray (LFS) in a roll-to-roll process with the line speed of 50 m/min. Surface wetting behavior of nanocoated paperboard was studied for different Ti/Si ratios in the precursor, affecting TiO2/SiO2 ratio in the coating. Wettability could be adjusted to practically any water contact angle between 10 and 160° by setting the Ti/Si ratio in the liquid precursor. Structure of the two component nanocoating was analysed with FE-SEM, TEM, EDS, XPS and XRD. The porous thin film coating was concluded to consist of ca. 10 nm sized mixed oxide nanoparticles with segregated TiO2 and SiO2 phases. Accumulation of carbonaceous compounds on the surface was seen to be almost linearly dependent on the Ti/Si ratio, indicating of each species being exposed in corresponding amount. However, wetting of the surface was observed to follow merely an S-shaped curve, caused by the roughness of the nanocoated surface. Reasons for the observed superhydrophobicity and superhydrophilicity of these binary nanocoatings on paperboard are discussed.

  • 188.
    Hansén, Magnus
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Byggnadsfysik och innemiljö (ETi ).
    Ylmen, Peter
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Byggnadsfysik och innemiljö (ETi ).
    Romild, Jörgen
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Polymer och fiber.
    Almström, Stefan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Polymer och fiber.
    Beständighet hos lufttäthetslösningar för byggnadskonstruktioner2013In: Bygg & Teknik, no 5, p. 15-Article in journal (Other (popular science, discussion, etc.))
  • 189.
    Hedberg, Jonas
    et al.
    KTH Royal Institute of Technology, Sweden.
    Karlsson, Hanna L.
    Karolinska Institute, Sweden.
    Hedberg, Yolanda
    KTH Royal Institute of Technology, Sweden.
    Blomberg, Eva
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Life Science. KTH Royal Institute of Technology, Sweden.
    Odnevall Wallinder, Inger
    KTH Royal Institute of Technology, Sweden.
    The importance of extracellular speciation and corrosion of copper nanoparticles on lung cell membrane integrity2016In: Colloids and Surfaces B: Biointerfaces, ISSN 0927-7765, E-ISSN 1873-4367, Vol. 141, p. 291-300Article in journal (Refereed)
    Abstract [en]

    Copper nanoparticles (Cu NPs) are increasingly used in various biologically relevant applications and products, e.g., due to their antimicrobial and catalytic properties. This inevitably demands for an improved understanding on their interactions and potential toxic effects on humans. The aim of this study was to investigate the corrosion of copper nanoparticles in various biological media and to elucidate the speciation of released copper in solution. Furthermore, reactive oxygen species (ROS) generation and lung cell (A549 type II) membrane damage induced by Cu NPs in the various media were studied. The used biological media of different complexity are of relevance for nanotoxicological studies: Dulbecco's modified eagle medium (DMEM), DMEM+ (includes fetal bovine serum), phosphate buffered saline (PBS), and PBS + histidine. The results show that both copper release and corrosion are enhanced in DMEM+, DMEM, and PBS + histidine compared with PBS alone. Speciation results show that essentially no free copper ions are present in the released fraction of Cu NPs in neither DMEM+, DMEM nor histidine, while labile Cu complexes form in PBS. The Cu NPs were substantially more membrane reactive in PBS compared to the other media and the NPs caused larger effects compared to the same mass of Cu ions. Similarly, the Cu NPs caused much more ROS generation compared to the released fraction only. Taken together, the results suggest that membrane damage and ROS formation are stronger induced by Cu NPs and by free or labile Cu ions/complexes compared with Cu bound to biomolecules.

  • 190.
    Hedberg, Y. S.
    et al.
    KTH Royal Institute of Technology, Sweden; Karolinska Institute, Sweden.
    Pradhan, S.
    KTH Royal Institute of Technology, Sweden.
    Cappellini, F.
    Karolinska Institute, Sweden.
    Karlsson, M. -E
    KTH Royal Institute of Technology, Sweden.
    Blomberg, Eva
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Life Science. KTH Royal Institute of Technology, Sweden.
    Karlsson, H. L.
    Karolinska Institute, Sweden.
    Odnevall Wallinder, I.
    KTH Royal Institute of Technology, Sweden.
    Hedberg, J. F.
    KTH Royal Institute of Technology, Sweden.
    Electrochemical surface oxide characteristics of metal nanoparticles (Mn, Cu and Al) and the relation to toxicity2016In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 212, p. 360-371Article in journal (Refereed)
    Abstract [en]

    Most metal nanoparticles (NPs), except noble metal NPs, rapidly form a thin surface oxide in ambient conditions. The protective properties of these oxides improve or worsen depending on the environment, e.g., the human lung. Several properties, including the chemical/electrochemical stability and defect density, determine the capacity of these surface oxides to hinder the bulk metal from further oxidation (corrosion). The aim of this study was to investigate whether electrochemical surface oxide characterization of non-functionalized base metal NPs of different characteristics (Al, Mn and Cu) can assist in understanding their bioaccessibility (metal release) in cell media (DMEM+) and their cytotoxic properties following exposure in lung epithelial (A549) cells. The composition and valence states of surface oxides of metal NPs and their electrochemical activity were investigated using an electrochemical technique based on a graphite paste electrode to perform cyclic voltammetry in buffer solutions and open circuit potential measurements in DMEM+. The electrochemical surface oxide characterization was complemented and verified by Raman spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The open circuit potential trends in DMEM+ correlated well with metal release results in the same solution, and provided information on the kinetics of oxide dissolution in the case of Cu NPs. Extensive particle agglomeration in cell medium (DMEM+) was observed by means of photon-cross correlation spectroscopy for all metal NPs, with sedimentation taking place very quickly. As a consequence, measurements of the real dose of added non-functionalized metal NPs to cell cultures for cytotoxicity testing from a sonicated stock solution were shown necessary. The cytotoxic response was found to be strongly correlated to changes in physico-chemical and electrochemical properties of the surface oxides of the metal NPs, the most potent being Cu NPs, followed by Mn NPs. No cytotoxicity was observed for Al NPs. The electrochemical surface oxide characterization corresponded well with other tools commonly used for nanotoxicological characterization and provided additional information.

  • 191. Hedberg, Y
    et al.
    Wang, X
    Hedberg, J
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Lundin, M
    Blomberg, Eva
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Odnevall Wallinder, I
    Surface-protein interactions on different stainless steel grades: Effects of protein adsorption, surface changes and metal release2013In: Journal of Materials Science: Materials in Medicine, ISSN 0957-4530 , Vol. 24, no 4, p. 1015-1033Article in journal (Refereed)
    Abstract [en]

    Implantation using stainless steels (SS) is an example where an understanding of protein-induced metal release from SS is important when assessing potential toxicological risks. Here, the protein-induced metal release was investigated for austenitic (AISI 304, 310, and 316L), ferritic (AISI 430), and duplex (AISI 2205) grades in a phosphate buffered saline (PBS, pH 7.4) solution containing either bovine serum albumin (BSA) or lysozyme (LSZ). The results show that both BSA and LSZ induce a significant enrichment of chromium in the surface oxide of all stainless steel grades. Both proteins induced an enhanced extent of released iron, chromium, nickel and manganese, very significant in the case of BSA (up to 40-fold increase), whereas both proteins reduced the corrosion resistance of SS, with the reverse situation for iron metal (reduced corrosion rates and reduced metal release in the presence of proteins). A full monolayer coverage is necessary to induce the effects observed. © 2013 The Author(s).

  • 192.
    Hedberg, Yolanda S.
    et al.
    KTH Royal Institute of Technology, Sweden; Karolinska Institute, Sweden.
    Pettersson, Maria
    Uppsala University, Sweden.
    Pradhan, Sulena
    KTH Royal Institute of Technology, Sweden.
    Odnevall Wallinder, Inger
    KTH Royal Institute of Technology, Sweden.
    Rutland, Mark W.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Life Science. KTH Royal Institute of Technology, Sweden.
    Persson, Cecilia
    Uppsala University, Sweden.
    Can Cobalt(II) and Chromium(III) ions released from joint prostheses influence the friction coefficient?2015In: ACS Biomaterial Science and Engineering, E-ISSN 2373-9878, Vol. 1, no 8, p. 617-620Article in journal (Refereed)
    Abstract [en]

    Cobalt chromium molybdenum alloys (CoCrMo) are commonly used as articulating components in joint prostheses. In this tribocorrosive environment, wear debris and metal ionic species are released and interact with proteins, possibly resulting in protein aggregation. This study aimed to investigate whether this could have an effect on the friction coefficient in a typical material couple, namely CoCrMo-on-polyethylene. It was confirmed that both Co(II) and Cr(III) ions, and their combination, at concentrations relevant for the metal release situation, resulted in protein aggregation and its concomitant precipitation, which increased the friction coefficient. Future studies should identify the clinical importance of these findings.

  • 193.
    Hellström, M.
    et al.
    University of Gothenburg, Sweden.
    El-Akouri, R. R.
    University of Gothenburg, Sweden.
    Sihlbom, C.
    University of Gothenburg, Sweden.
    Olsson, B. M.
    University of Gothenburg, Sweden.
    Lengqvist, J.
    University of Gothenburg, Sweden.
    Bäckdahl, Henrik
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik.
    Johansson, B. R.
    University of Gothenburg, Sweden.
    Olausson, M.
    University of Gothenburg, Sweden.
    Sumitran-Holgersson, S.
    University of Gothenburg, Sweden.
    Brännström, M.
    University of Gothenburg, Sweden.
    Towards the development of a bioengineered uterus: Comparison of different protocols for rat uterus decellularization2014In: Acta Biomaterialia, ISSN 1742-7061, E-ISSN 1878-7568, Vol. 10, no 12, p. 5034-5042Article in journal (Refereed)
    Abstract [en]

    Uterus transplantation (UTx) may be the only possible curative treatment for absolute uterine factor infertility, which affects 1 in every 500 females of fertile age. We recently presented the 6-month results from the first clinical UTx trial, describing nine live-donor procedures. This routine involves complicated surgery and requires potentially harmful immune suppression to prevent rejection. However, tissue engineering applications using biomaterials and stem cells may replace the need for a live donor, and could prevent the required immunosuppressive treatment. To investigate the basic aspects of this, we developed a novel whole-uterus scaffold design for uterus tissue engineering experiments in the rat. Decellularization was achieved by perfusion of detergents and ionic solutions. The remaining matrix and its biochemical and mechanical properties were quantitatively compared from using three different protocols. The constructs were further compared with native uterus tissue composition. Perfusion with Triton X-100/dimethyl sulfoxide/H2O led to a compact, weaker scaffold that showed evidence of a compromised matrix organization. Sodium deoxycholate/dH2O perfusion gave rise to a porous scaffold that structurally and mechanically resembled native uterus better. An innovative combination of two proteomic analyses revealed higher fibronectin and versican content in these porous scaffolds, which may explain the improved scaffold organization. Together with other important protocol-dependent differences, our results can contribute to the development of improved decellularization protocols for assorted organs. Furthermore, our study shows the first available data on decellularized whole uterus, and creates new opportunities for numerous in vitro and in vivo whole-uterus tissue engineering applications.

  • 194.
    Henberg, T
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Uppgradernig av återvunnen HDPE1998Report (Refereed)
  • 195.
    Henriksson, Lars-Åke
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Polymer och fiber.
    Methods for verification of equipment criteria for floorball.1995Report (Refereed)
  • 196.
    Heydari, Golrokh
    et al.
    KTH Royal Institute of Technology, Sweden.
    Sedighi Moghaddam, Maziar
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik. KTH Royal Institute of Technology, Sweden.
    Tuominen, Mikko
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Fielden, Matthew
    KTH Royal Institute of Technology, Sweden.
    Haapanen, Janne
    TUT Tampere University of Technology, Finland.
    Mäkelä, Jyrki M.
    TUT Tampere University of Technology, Finland.
    Claesson, Per M.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik. KTH Royal Institute of Technology, Sweden.
    Wetting hysteresis induced by temperature changes: Supercooled water on hydrophobic surfaces2016In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 468, p. 21-33Article in journal (Refereed)
    Abstract [en]

    The state and stability of supercooled water on (super)hydrophobic surfaces is crucial for low temperature applications and it will affect anti-icing and de-icing properties. Surface characteristics such as topography and chemistry are expected to affect wetting hysteresis during temperature cycling experiments, and also the freezing delay of supercooled water. We utilized stochastically rough wood surfaces that were further modified to render them hydrophobic or superhydrophobic. Liquid flame spraying (LFS) was utilized to create a multi-scale roughness by depositing titanium dioxide nanoparticles. The coating was subsequently made non-polar by applying a thin plasma polymer layer. As flat reference samples modified silica surfaces with similar chemistries were utilized. With these substrates we test the hypothesis that superhydrophobic surfaces also should retard ice formation. Wetting hysteresis was evaluated using contact angle measurements during a freeze-thaw cycle from room temperature to freezing occurrence at -7 °C, and then back to room temperature. Further, the delay in freezing of supercooled water droplets was studied at temperatures of -4 °C and -7 °C. The hysteresis in contact angle observed during a cooling-heating cycle is found to be small on flat hydrophobic surfaces. However, significant changes in contact angles during a cooling-heating cycle are observed on the rough surfaces, with a higher contact angle observed on cooling compared to during the subsequent heating. Condensation and subsequent frost formation at sub-zero temperatures induce the hysteresis. The freezing delay data show that the flat surface is more efficient in enhancing the freezing delay than the rougher surfaces, which can be rationalized considering heterogeneous nucleation theory. Thus, our data suggests that molecular flat surfaces, rather than rough superhydrophobic surfaces, are beneficial for retarding ice formation under conditions that allow condensation and frost formation to occur.

  • 197.
    Heydari, Golrokh
    et al.
    KTH Royal Institute of Technology, Sweden.
    Tyrode, Erik
    KTH Royal Institute of Technology, Sweden.
    Visnevskij, Ceslav
    Vilnius University, Lithuania.
    Makuska, Ricardas
    Vilnius University, Lithuania.
    Claesson, Per M.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik. KTH Royal Institute of Technology, Sweden.
    Temperature-dependent deicing properties of electrostatically anchored branched brush layers of poly(ethylene oxide)2016In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 32, no 17, p. 4194-4202Article in journal (Refereed)
    Abstract [en]

    The hydration water of hydrophilic polymers freezes at subzero temperatures. The adsorption of such polymers will result in a hydrophilic surface layer that strongly binds water. Provided this interfacial hydration water remains liquidlike at subzero temperatures, its presence could possibly reduce ice adhesion, in particular, if the liquidlike layer is thicker than or comparable to the surface roughness. To explore this idea, a diblock copolymer, having one branched bottle-brush block of poly(ethylene oxide) and one linear cationic block, was electrostatically anchored on flat silica surfaces. The shear ice adhesion strength on such polymer-coated surfaces was investigated down to -25 °C using a homebuilt device. In addition, the temperature dependence of the ice adhesion on surfaces coated with only the cationic block, only the branched bottle-brush block, and with linear poly(ethylene oxide) was investigated. Significant ice adhesion reduction, in particular, at temperatures above -15 °C, was observed on silica surfaces coated with the electrostatically anchored diblock copolymer. Differential scanning calorimetry measurements on bulk polymer solutions demonstrate different thermal transitions of water interacting with branched and linear poly(ethylene oxide) (with hydration water melting points of about -18 and -10 °C, respectively). This difference is consistent with the low shear ice adhesion strength measured on surfaces carrying branched bottle-brush structured poly(ethylene oxide) at -10 °C, whereas no significant adhesion reduction was obtained with linear poly(ethylene oxide) at this temperature. We propose a lubrication effect of the hydration water bound to the branched bottle-brush structured poly(ethylene oxide), which, in the bulk, does not freeze until -18 °C.

  • 198.
    Hilchenbach, M.
    et al.
    Max Planck Institute for Solar System Research, Germany.
    Kissel, J.
    Max Planck Institute for Solar System Research, Germany.
    Langevin, Y.
    CNRS, France; University of Paris-Sud, France.
    Briois, C.
    CNRS, France; University of Orléans, France.
    Hoerner, H. V.
    Von Hoerner & Sulger GmbH, Germany.
    Koch, A.
    Von Hoerner & Sulger GmbH, Germany.
    Schulz, R.
    ESTEC European Space Research and Technology Centre, Netherlands.
    Silén, J.
    Finnish Meteorological Institute, Finland.
    Altwegg, K.
    University of Bern, Switzerland.
    Colangeli, L.
    ESTEC European Space Research and Technology Centre, Netherlands.
    Cottin, H.
    CNRS, France; Paris Diderot University, France.
    Engrand, C.
    CNRS, France; University of Paris-Saclay, France.
    Fischer, H.
    Max Planck Institute for Solar System Research, Germany.
    Glasmachers, A.
    University of Wuppertal, Germany.
    Grün, E.
    Max Planck Institute for Nuclear Physics, Germany.
    Haerendel, G.
    Max Planck Institute for Extraterrestrial Physics, Germany.
    Henkel, H.
    Von Hoerner & Sulger GmbH, Germany.
    Höfner, H.
    Max Planck Institute for Extraterrestrial Physics, Germany.
    Hornung, K.
    Universität der Bundeswehr, Germany.
    Jessberger, E. K.
    University of Münster, Germany.
    Lehto, H.
    University of Turku, Finland.
    Lehto, K.
    University of Turku, Finland.
    Raulin, F.
    CNRS, France; Paris Diderot University, France.
    Roy, L. L.
    University of Bern, Switzerland.
    Rynö, J.
    Finnish Meteorological Institute, Finland.
    Steiger, W.
    RC Seibersdorf Research GmbH Business Field Aerospace Technology, Austria.
    Stephan, T.
    University of Chicago, US.
    Thirkell, L.
    CNRS, France; University of Orléans, France.
    Thomas, R.
    CNRS, France; University of Orléans, France.
    Torkar, K.
    Austrian Academy of Sciences, Austria.
    Varmuza, K.
    Vienna University of Technology, Austria.
    Wanczek, K. -P
    University of Bremen, Germany.
    Altobelli, N.
    ESAC European Space Astronomy Centre, Spain.
    Baklouti, D.
    CNRS, France; University of Paris-Sud, France.
    Bardyn, A.
    CNRS, France; University of Orléans, France; Paris Diderot University, France.
    Fray, N.
    CNRS, France; Paris Diderot University, France.
    Krüger, H.
    Max Planck Institute for Solar System Research, Germany.
    Ligier, N.
    CNRS, France; University of Paris-Sud, France.
    Lin, Z.
    NCU National Central University, Taiwan.
    Martin, P.
    CNRS, France; University of Orléans, France.
    Merouane, S.
    Max Planck Institute for Solar System Research, Germany.
    Orthous-Daunay, F. R.
    CNRS, France; Université Grenoble Alpes, France.
    Paquette, J.
    Max Planck Institute for Solar System Research, Germany.
    Revillet, C.
    CNRS, France; University of Orléans, France.
    Siljeström, Sandra
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik.
    Stenzel, O.
    Max Planck Institute for Solar System Research, Germany.
    Zaprudin, B.
    University of Turku, Finland.
    COMET 67P/CHURYUMOV-GERASIMENKO: CLOSE-UP on DUST PARTICLE FRAGMENTS2016In: Astrophysical Journal Letters, ISSN 2041-8205, E-ISSN 2041-8213, Vol. 816, no 2, article id L32Article in journal (Refereed)
    Abstract [en]

    The COmetary Secondary Ion Mass Analyser instrument on board ESA's Rosetta mission has collected dust particles in the coma of comet 67P/Churyumov-Gerasimenko. During the early-orbit phase of the Rosetta mission, particles and particle agglomerates have been imaged and analyzed in the inner coma at distances between 100 km and 10 km off the cometary nucleus and at more than 3 AU from the Sun. We identified 585 particles of more than 14 μm in size. The particles are collected at low impact speeds and constitute a sample of the dust particles in the inner coma impacting and fragmenting on the targets. The sizes of the particles range from 14 μm up to sub-millimeter sizes and the differential dust flux size distribution is fitted with a power law exponent of -3.1. After impact, the larger particles tend to stick together, spread out or consist of single or a group of clumps, and the flocculent morphology of the fragmented particles is revealed. The elemental composition of the dust particles is heterogeneous and the particles could contain typical silicates like olivine and pyroxenes, as well as iron sulfides. The sodium to iron elemental ratio is enriched with regard to abundances in CI carbonaceous chondrites by a factor from ∼1.5 to ∼15. No clear evidence for organic matter has been identified. The composition and morphology of the collected dust particles appear to be similar to that of interplanetary dust particles.

  • 199.
    Hillerström, Anna
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Life Science.
    Production of Biodegradable Foams Using Supercritical CO22014In: Polymer-plastics technology and engineering (Softcover ed.), ISSN 0360-2559, E-ISSN 1525-6111, Vol. 53, no 11, p. 1169-1177Article in journal (Refereed)
  • 200.
    Hillerström, Anna
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Life Science.
    Andersson, Martin
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Samuelsson, Jörgen
    Karlstad University, Sweden.
    van Stam, Jan
    Karlstad University, Sweden.
    Solvent strategies for loading and release in mesoporous silica2015In: Colloid and Interface Science Communications, ISSN 2215-0382, Vol. 3, p. 5-8Article in journal (Refereed)
    Abstract [en]

    A model molecule, ibuprofen, was loaded in the pores of mesoporous silica by adsorption from nonpolar solvents (liquid carbon dioxide and cyclohexane) and from a polar solvent (methanol). It was sufficient with a very low concentration of ibuprofen in the nonpolar solvents to achieve maximum loading of ibuprofen in the mesoporous particles. When using liquid carbon dioxide, the pores of the mesoporous silica particles were filled completely with ibuprofen at a lower ibuprofen concentration than similar experiments performed with cyclohexane. When methanol was used, the maximum amount of loaded ibuprofen was never achieved. Furthermore, x-ray scattering showed that all ibuprofen loaded into the mesoporous particles were in an amorphous state. Ibuprofen was released from the mesoporous particles to water within a couple of minutes, regardless of solvent used for loading. It was found that the release of ibuprofen from mesoporous silica was much faster than that of crystalline ibuprofen.

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