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  • 301.
    Albrektsson, Joakim
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Jansson, Robert
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Silfwerbrand, Johan
    Assessment of fire exposed concrete structures2012In: fib Symposium 2012: Concrete Structures for Sustainable Community, 2012, , p. 619-626Conference paper (Refereed)
  • 302.
    Albrektsson, Joakim
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Lind, Per
    Brandprov av limträbalkar för Japan2011In: Brandposten, no 45, p. 7-Article in journal (Other (popular science, discussion, etc.))
  • 303.
    Albrektsson, Joakim
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Mattsson, Ida
    Skadeutredning av parkeringsgarage efter storbrand2011In: Brandposten, no 45, p. 10-Article in journal (Other (popular science, discussion, etc.))
  • 304.
    Alcusa-Saez, E. P.
    et al.
    University of Valencia, Spain.
    Diez, A.
    University of Valencia, Spain.
    Rivera-Perez, E.
    University of Valencia, Spain.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Norin, Lars
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Andres, M. V.
    University of Valencia, Spain.
    All-fiber acousto-optic tunable filter in polyimide coated optical fibers2017In: International Conference on Transparent Optical Networks, 2017Conference paper (Refereed)
    Abstract [en]

    We present the experimental demonstration of in-fiber acousto-optic coupling in a polyimide-coated optical fiber. Although the presence of the polyimide coating increases is significantly the attenuation of the acoustic wave, we show that acousto-optic interaction can still be produced with reasonable efficiency. The effect of the polyimide coating on the acousto-optic interaction process is analyzed in detailed. Theoretical and experimental results are in good agreement. To our knowledge, this is the first experimental demonstration of acousto-optic coupling in optical fibers with robust protective coating.

  • 305.
    Alcusa-Sáez, E. P.
    et al.
    ICMUV Departamento de Física Aplicada y Electromagnetismo, Spain.
    Díez, Antonio
    ICMUV Departamento de Física Aplicada y Electromagnetismo, Spain.
    Rivera-Pérez, E.
    ICMUV Departamento de Física Aplicada y Electromagnetismo, Spain.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Norin, L.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Andrés, M. V.
    ICMUV Departamento de Física Aplicada y Electromagnetismo, Spain.
    Acousto-optic interaction in polyimide coated optical fibers with flexural waves2017In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 25, no 15, p. 17167-17173Article in journal (Refereed)
    Abstract [en]

    Acousto-optic coupling in polyimide-coated single-mode optical fibers using flexural elastic waves is demonstrated. The effect of the polyimide coating on the acousto-optic interaction process is analyzed in detailed. Theoretical and experimental results are in good agreement. Although the elastic attenuation is significant, we show that acousto-optic coupling can be produced with a reasonably good efficiency. To our knowledge, it is the first experimental demonstration of acousto-optic coupling in optical fibers with robust protective coating.

  • 306.
    Aldaeus, Fredrik
    RISE - Research Institutes of Sweden, Bioeconomy, Biobased Materials.
    The Bioeconomy Research Programme 2018-20202018In: The 8th Nordic Wood Biorefinery Conference: NWBC 2018: proceedings / [ed] Hytönen Eemeli, Vepsäläinen Jessica, Espoo: VTT Technical Research Centre of Finland , 2018, p. 83-Conference paper (Other academic)
  • 307.
    Aldaeus, Fredrik
    et al.
    RISE, Innventia.
    Dedic, Dina
    RISE, Innventia.
    Karpenja, Tatjana
    RISE, Innventia.
    Magnusson, Mikael
    RISE, Innventia.
    Modorato-Rosta, Caroline
    RISE, Innventia.
    Rosén, Fredrik
    RISE, Innventia.
    Sundin, Konstantin
    RISE, Innventia.
    Lindström, Mikael
    RISE, Innventia.
    Lucisano, Marco
    RISE, Innventia.
    Towards a cellulose-based society: current trends, future scenarios, and the role of the wood biorefinery2016In: Proceedings of the 14th European workshop on lignocellulosics and pulp, 2016, Vol. 2, p. 125-127Conference paper (Other academic)
    Abstract [en]

    There is a great need to maintain research for a future in which the traditional value chains of the forest industry are combined with the needs and demands of a bio-based economy. In such a future, the pulp mill biorefinery will be a crucial node. In order to map the transformation from a fossil-based society to a cellulose-based society, a global consumer survey has been made. In addition, interviews and workshops with various players throughout the bio-economy field have been accomplished. Several current trends that affect the road to a cellulose-based society have been identified. These trends are describing the effects of urbanization, consumer behaviour, new business models, material recycling, open innovation, and the need for early demonstration of new research. The trends have been combined with uncertainties into a number of plausible scenarios describing the society and the role of cellulose in the year 2030.

  • 308.
    Aldaeus, Fredrik
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy.
    Dedic, Dina
    RISE - Research Institutes of Sweden, Bioeconomy.
    Karpenja, Tatjana
    RISE - Research Institutes of Sweden, Bioeconomy.
    Magnusson, Mikael
    RISE - Research Institutes of Sweden, Bioeconomy.
    Rosén, Fredrik
    RISE - Research Institutes of Sweden, Bioeconomy.
    Sundin, Konstantin
    RISE - Research Institutes of Sweden, Bioeconomy.
    Lindström, Mikael
    RISE - Research Institutes of Sweden, Bioeconomy.
    Lucisano, Marco
    RISE - Research Institutes of Sweden, Bioeconomy.
    Modorato-Rosta, Caroline
    RISE - Research Institutes of Sweden, Bioeconomy.
    Towards a cellulose-based society: current market and consumer trends2017In: The 7th Nordic Wood Biorefinery Conference held in Stockholm, Sweden, 28-30 Mar. 2017: NWBC 2017, Stockholm: RISE Bioekonomi , 2017, p. 1-Conference paper (Other academic)
    Abstract [en]

    It has been proposed that the future of the forest industry will involve the traditional value chains combined with the needs and demands of a bio-based economy. A global consumer survey was undertaken, together with interviews and workshops with various representatives through the bio-economy. Sources also included in-depth literature studies and research reviews. Based on this input, several current trends have been identified that will affect the route towards a cellulose-based society. These trends describe the effects of urbanization, consumer behaviour, new business models, material recycling, open innovation and the necessity for early demonstration of new research. Four different but equally plausible scenarios have been identified describing the society and the role of cellulose in 2030, highlighting the role of the wood-based biorefinery.

  • 309.
    Aldaeus, Fredrik
    et al.
    RISE, Innventia.
    Larsson, Karolina
    RISE, Innventia.
    Stevanic Srndovic, Jasna
    RISE, Innventia.
    Kubat, Mikaela
    RISE, Innventia.
    Karlström, Katarina
    RISE, Innventia.
    Norberg, Lars
    RISE, Innventia.
    Anadolyan, Shant
    RISE, Innventia.
    Peciulyte, Ausra
    Chalmers University of Technology, Sweden.
    Olsson, Lisbeth
    Chalmers University of Technology, Sweden.
    Larsson, Per Tomas
    RISE, Innventia.
    The supramolecular structure of cellulose-rich wood and wheat straw pulps can be a determinative factor for enzymatic hydrolysability2016In: The 7th Workshop on cellulose, regenerated cellulose and cellulose derivatives, 2016, p. 39-39, article id 11Conference paper (Other academic)
    Abstract [en]

    Conversion of biomass to biofuels and other products is a research area that is currently attracting a great amount of interest, particularly because such production may be envisaged as a key part of any bio-based economy. Lignocellulosic biomass is abundant and sustainable, and can therefore potentially support large-scale production of biofuel as an alternative to petroleum-based fuel.

    The enzymatic hydrolysability of three industrial pulps, five lab made pulps, and one microcrystalline cellulose powder was assessed using commercial cellulolytic enzymes. To gain insight into the factors that influence the hydrolysability, a thorough characterization of the samples was done, including their chemical properties (cellulose content, hemicellulose content, lignin content, and kappa number), their macromolecular properties (peak molar mass, number-average molar mass, weight-average molar mass, polydispersity, and limiting viscosity) and their supramolecular properties (fibre saturation point, specific surface area, average pore size, and crystallinity). The hydrolysability was assessed by determination of initial conversion rate and final conversion yield, with conversion yield defined as the amount of glucose in solution per unit of glucose in the substrate. Multivariate data analysis revealed that for the investigated samples the conversion of cellulose to glucose was mainly dependent on the supramolecular properties, such as specific surface area and average pore size. The molar mass distribution, the crystallinity, and the lignin content of the pulps had no significant effect on the hydrolysability of the investigated samples.

    In addition, experiments were carried out aiming at identifying suitable conditions for pre-treatment of wheat straw, for the purpose of making cellulose rich pulps with improved enzymatic reactivity. Two sets of conditions for pre-treatment of wheat straw were identified; a combination of low temperature alkaline washing and acid pre-hydrolysis, or high temperature acid pre-hydrolysis. Both bleached wheat straw pulps showed similar enzymatic reactivity. However, the enzymatic reactivity of both bleached wheat straw pulps was found to be significantly less than what has been achieved for wood pulps. A probable explanation for the low enzymatic reactivity of the bleached wheat straw pulp can be the small pore size, limiting the access for enzymes to the cellulose surfaces in the fibre wall interior.Text, figures and tables in an extended abstract (< 4 pages with title and references).

  • 310.
    Aldaeus, Fredrik
    et al.
    RISE, Innventia.
    Larsson, Karolina
    RISE, Innventia.
    Stevanic Srndovic, Jasna
    RISE, Innventia.
    Kubat, Mikaela
    RISE, Innventia.
    Karlström, Katarina
    RISE, Innventia.
    Peciulyte, Ausra
    Chalmers University of Technology, Sweden.
    Olsson, Lilsbeth
    Chalmers University of Technology, Sweden.
    Larsson, Per Tomas
    RISE, Innventia.
    The supramolecular structure of cellulose-rich wood pulps can be a determinative factor for enzymatic hydrolysability2015In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 22, no 6, p. 3991-4002Article in journal (Refereed)
    Abstract [en]

    The enzymatic hydrolysability of three industrial pulps, five lab made pulps, and one microcrystalline cellulose powder was assessed using commercial cellulolytic enzymes. To gain insight into the factors that influence the hydrolysability, a thorough characterization of the samples was done, including their chemical properties (cellulose content, hemicellulose content, lignin content, and kappa number), their macromolecular properties (peak molar mass, number-average molar mass, weight-average molar mass, polydispersity, and limiting viscosity) and their supramolecular properties (fibre saturation point, specific surface area, average pore size, and crystallinity). The hydrolysability was assessed by determination of initial conversion rate and final conversion yield, with conversion yield defined as the amount of glucose in solution per unit of glucose in the substrate. Multivariate data analysis revealed that for the investigated samples the conversion of cellulose to glucose was mainly dependent on the supramolecular properties, such as specific surface area and average pore size. The molar mass distribution, the crystallinity, and the lignin content of the pulps had no significant effect on the hydrolysability of the investigated samples.

  • 311.
    Aldaeus, Fredrik
    et al.
    RISE, Innventia.
    Larsson, Karolina
    RISE, Innventia.
    Stevanic Srndovic, Jasna
    RISE, Innventia.
    Kubat, Mikaela
    RISE, Innventia.
    Karlström, Katarina
    RISE, Innventia.
    Peciulyte, Ausra
    Olsson, Lisbeth
    The influence of various pulp properties on the enzymatic hydrolyzability2014Conference paper (Refereed)
  • 312.
    Aldaeus, Fredrik
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy. RISE, Innventia.
    Olsson, Anne-Mari
    RISE - Research Institutes of Sweden, Bioeconomy. RISE, Innventia.
    Stevanic Srndovic, Jasna
    RISE - Research Institutes of Sweden, Bioeconomy. RISE, Innventia.
    Miniaturized determination of ash content in kraft lignin samples using oxidative thermogravimetric analysis2017In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 32, no 2, p. 280-282Article in journal (Refereed)
    Abstract [en]

    A study has been made of several aspects of determination of ash content in kraft lignin samples using thermogravimetric analysis (TGA). Three different methods were used; with the main differences between the methods being that two have a temperature hold at 250 deg C to remove volatiles and that the three methods use different maximum temperatures, namely 525, 550 and 575 deg C, respectively. The three kraft lignins used were produced using the LignoBoost lignin isolation process. It has been demonstrated that the results obtained by the different temperature programmes showed no significant difference. The results were comparable with those from using oven ignition. Moreover, the limit of quantification was several orders of magnitude lower than when using oven ignition. It has been recommended that if TGA is used for determination of ash content, a temperature programme from a standard method should be used, which should be mentioned together with the results. The temperature programme in method one (corresponding to ISO 1762) was the shortest and the preferable method. A well as requiring less labour due to fewer movements in the analytical protocol, the TGA methods enabled a high sample throughput due to autosampling possibilities.

  • 313.
    Aldaeus, Fredrik
    et al.
    RISE, Innventia.
    Olsson, Anne-Mari
    RISE, Innventia.
    Stevanic Srndovic, Jasna
    RISE, Innventia.
    Miniaturized determination of ash content in kraft lignin samples using thermogravimetric analysis2015In: 18th International Symposium on Wood, Fiber and Pulping Chemistry, September 9-11, 2015, Vienna, 2015, p. 352-354Conference paper (Other academic)
    Abstract [en]

    Thermogravimetric analysis (TGA) in oxidative conditions is a promising alternative to ignition in oven for the determination of inorganic residue, commonly referred to as ash. It is here shown that TGA can be used with temperature programs resembling those in standardized methods for oven ignition, and obtainequivalent results even though the sample amount is several orders of magnitude lower. The precision and limit of quantification of TGA is also discussed.

  • 314.
    Aldaeus, Fredrik
    et al.
    RISE, Innventia.
    Schweinebarth, Hannah
    RISE, Innventia.
    Jacobs, Anna
    RISE, Innventia.
    Simplified determination of Klason lignin in black liquor and lignin samples2010In: 11th European workshop on lignocellulosics and pulp: EWLP 2010, 2010, p. 45-48Conference paper (Other academic)
  • 315.
    Aldaeus, Fredrik
    et al.
    RISE, Innventia.
    Schweinebarth, Hannah
    RISE, Innventia.
    Törngren, Per
    RISE, Innventia.
    Jacobs, Anna
    RISE, Innventia.
    Simplified determination of total lignin content in kraft lignin samples and black liquors2011In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, no 4, p. 601-604Article in journal (Refereed)
  • 316.
    Aleite, Edgardo
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Gyllström, Joakim
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Mätning av intensitetsbrus i lasrar (RIN)2000Report (Refereed)
  • 317. Alexander, NE
    et al.
    Alderman, B
    Allona, F
    Frijlink, P
    Gonzalo, R
    Hägelen, M
    Ibáñez, A
    Krozer, V
    Langford, ML
    Schikora, M
    Wang, H
    Weber, MA
    TeraSCREEN: Multi-frequency multi-mode Terahertz screening for border checks2014In: Proc. SPIE 9078, Passive and Active Millimeter-Wave Imaging XVII, 2014Conference paper (Other academic)
  • 318.
    Alexandersson, Ellen
    RISE, Swedish ICT, Viktoria.
    Induktiv laddning och hälsoeffekter: RAPPORT - OMVÄRLDSANALYSKRING ELEKTROMAGNETISKAFÄLT VID INDUKTIV LADDNING AVELFORDON2013Report (Other academic)
    Abstract [en]

    Elfordon representerar en av de mest lovande vägarna för att nå en fossiloberoende transportsektor och minska koldioxidutsläpp och luftföroreningar. Induktiv laddning av elfordon öppnar för möjligheten att ladda helt automatiskt vilket många tror kan höja elfordonens attraktionskraft och därmed öka försäljningstakten av elfordon. Dock har diskussioner redan satt igång huruvida läckfält vid energiöverföringen kan påverka människor.

    Elektromagnetiska fält finns naturligt i vår omgivning, men beroende på typ av fält, frekvens och fältstyrka interagerar de med kroppen på olika sätt. Fält för induktionsladdning ligger i ett intermediärt frekvensområde, det vill säga frekvensmässigt mellan kraftfrekventa och radiofrekventa fält. För kraft- och radiofrekventa fält har en hel del forskning genomförts kring fältens kopplingar till biologiska interaktioner och eventuell negativ hälsopåverkan. Utifrån resultaten har rekommendationer för högsta exponeringsnivåer för fälten tagits fram, även om många av resultaten fortfarande är tvetydiga. För de intermediära fälten saknas i stort sett forskning och därför har rekommendationer för dessa fält i stora delar extrapolerats fram utifrån resultat för kraft- och radiofrekvenser.

    Frågorna kring huruvida fält från induktiv laddning kan orsaka hälsoeffekter är därmed fortfarande oklara och därför bör försiktighetsprincipen tillämpas. Vi behöver också koppla samman forskning kring teknikutveckling med forskning som utreder eventuella hälsoeffekter för att höja kunskapsnivån. Därmed kan vi förekomma risken att en debatt blossar upp i samhället där vi står utan svar, vilket skulle kunna påverka elfordonens introduktion i Sverige negativt.

  • 319.
    Alexandersson, Johan
    CBI - Cement- och betonginstitutet.
    Polymercementbetong: Polymer cement concrete1983Report (Refereed)
  • 320.
    Alexandersson, Johan
    CBI - Cement- och betonginstitutet.
    Strength losses in heat cured concrete1972Report (Refereed)
  • 321.
    Alexandersson, Johan
    CBI - Cement- och betonginstitutet.
    Strength losses in heat curing: causes and countermeasures1974Report (Refereed)
  • 322. Alexandrescu, L.
    et al.
    Syverud, K.
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Belosi, F.
    Nanofibers against nanoparticles:: Cellulosic nanoparticles for nanoparticle aerosol filtration2012Conference paper (Refereed)
  • 323. Alexandrescu, L.
    et al.
    Syverud, Kristin
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Chinga-Carrasco, Gary
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Iotti, M.
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Gregersen, Ø.
    Belosi, F.
    Gatti, A.M.
    Air filtration of nano-particles using cellulose nanofibrils2012Conference paper (Refereed)
  • 324. Alexandrescu, L.
    et al.
    Syverud, Kristin
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Gatti, A.
    Chinga-Carrasco, Gary
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Cytotoxicity tests of cellulose nanofibril-based structures2013In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 20Article in journal (Refereed)
  • 325. Alexandrova, L
    et al.
    Hanumantha Rao, K
    Forsberg, KSE
    Grigorov, L
    Pugh, RJ
    YKI – Ytkemiska institutet.
    Three-phase contact parameters measurements for silica-mixed cationic-anionic surfactant systems2009In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 348, no 1-3, p. 228-233Article in journal (Refereed)
    Abstract [en]

    The stability and interactions in thin wetting films between the silica surface and air bubble containing (a) straight chain C10 amine and (b) cationic/anionic surfactant mixture of a straight chain C10 amine with sodium C8, C10 and (straight chain) C12 sulfonates, were studied using the microscopic thin wetting film method developed by Platikanov [D. Platikanov, J. Phys. Chem. 68 (1964) 3619]. Film lifetimes, three-phase contact (TPC) expansion rate, receding contact angles and surface tension were measured. The presence of the mixed cationic/anionic surfactants was found to lessen contact angles and suppresses the thin aqueous film rupture, thus inducing longer film lifetime, as compared to the pure amine system. In the case of mixed surfactants heterocoagulation could arise through the formation of positively charged interfacial complexes. Mixed solution of cationic and anionic surfactants shows synergistic lowering in surface tension. The formation of the interfacial complex at the air/solution interface was confirmed by surface tension data. It was also shown, that the chain length compatibility between the anionic and cationic surfactants system controls the strength of the interfacial complex. The observed phenomena were discussed in terms of the electrostatic heterocoagulation theory, where the interactions can be attractive or repulsive depending on the different surface activity and charge of the respective surfactants at the two interfaces.

  • 326. Alexandrova, L
    et al.
    Hanumantha, Rao K
    Forsberg, KSE
    Grigorov, L
    Pugh, Robert J
    YKI – Ytkemiska institutet.
    The influence of mixed cationic-anionic surfactants on the three-phase contact parameters in silica-solution systems2011In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 373, p. 145-151Article in journal (Refereed)
    Abstract [en]

    The formation of thin wetting films on silica surface from aqueous solution of (a) tetradecyltrimetilammonium bromide (C14TAB) and (b) surfactant mixture of the cationic C14TAB with the anionic sodium alkyl- (straight chain C12-, C14- and C16-) sulfonates, was studied using the microscopic thin wetting film method developed by Platikanov. Film lifetimes, three-phase contact (TPC) expansion rates, receding contact angles and surface tension were measured. It was found that the mixed surfactants caused lower contact angles, lower rates of the thin aqueous film rupture and longer film lifetimes, as compared to the pure C14TAB. This behavior was explained by the strong initial adsorption of interfacial complexes from the mixed surfactant system at the air/solution interface, followed by adsorption at the silica interface. The formation of the interfacial complexes at the air/solution interface was proved by means of the surface tension data. It was also shown, that the chain length compatibility between the anionic and cationic surfactants controls the strength of the interfacial complex and causes synergistic lowering in the surface tension. The film rupture mechanism was explained by the heterocoagulation mechanism between the positively charged air/solution interface and the solution/silica interface, which remained negatively charged.

  • 327. Alexandrova, L
    et al.
    Pugh, RJ
    YKI – Ytkemiska institutet.
    Tiberg, F
    YKI – Ytkemiska institutet.
    Grigorov, L
    Confirmation of the heterocoagulation theory of flotation1999In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 15, p. 7464-7471Article in journal (Refereed)
    Abstract [en]

    To model the flotation process, we have used the microscopic method developed by Scheludko to study the stability of an aqueous thin film containing tetradecyltrimethylammonium bromide ( C14TAB ) between an air bubble and a silica substrate. Experiments were performed at a range of C14TAB concentrations and pH values. Spontaneous rupture of the thin aqueous film was interpretated in terms of heterocoagulation resulting from the preferential adsorption of relatively low surfactant concentrations at the vapour/solution interface causing a net positive charge while the solution/silica interface remained negatively charged. In addition, during the the three-phase-contact (TPC) expansion or de-wetting step following film rupture, the movement of TPC across the silica substrate leads to transfer of amine from the vapour/solution interface to the vapour/silica. This process resembles a Langmuir-Blodgett deposition process and emphasized the importance of the solution/vapour interface in the de-wetting process.

  • 328.
    Alexis, Jonas
    et al.
    RISE, Swerea, Swerea MEFOS.
    Björkvall, Johan.
    RISE, Swerea, Swerea MEFOS.
    Mathematical modeling of stirring for an optimized ladle furnace process2011In: AISTech - Iron and Steel Technology Conference Proceedings, 2011, p. 1389-1399Conference paper (Refereed)
    Abstract [en]

    [No abstract available]

  • 329.
    Alexis, Jonas
    et al.
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    Jönsson, P.
    Royal Institute of Technology.
    Jonsson, Lage
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    Heating and electromagnetic stirring in a ladle furnace - a simulation model2000In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 40, no 11, p. 1098-1104Article in journal (Refereed)
    Abstract [en]

    A three-dimensional simulation model coupling heating and induction stirring in an ASEA-SKF ladle furnace was developed. Data of the heat transfer from the arcs to the steel bath were predicted in a separate model and included as boundary conditions in a ladle model. The arc model considers the contributions of heat transferred by of each of the following mechanisms: radiation, convection, condensation and energy transported by electrons. Predictions were made to simulate the change of temperature distribution in the ladle during simultaneous heating with electrodes and stirring by induction. A first attempt was made to compare the predictions with measured temperatures from a 100 t ASEA-SKF ladle. The agreement was found to be fairly good when heat-flux data for a 25 cm arc length were used as input to the ladle model. This indicates that the model can be used for more in-depth studies of the effects of heating for ladles that are inductively stirred.

  • 330.
    Alexis, Jonas
    et al.
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    Jönsson, P.G.
    KTH.
    Jonsson, Lage
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    A model of an induction-stirred ladle accounting for slag and surface deformation1999In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 39, no 8, p. 772-778Article in journal (Refereed)
    Abstract [en]

    A 3 dimensional 2-phase model of an induction stirred ladle has been developed. The model is based on fundamental transport equations and includes the solution of steel- and slag-phase. Predicted velocities are in very good agreement with experimental data. Predicted velocities and turbulent kinetic energy dissipation from the model are shown to have linear relationships with input stirring force for different cylindrical ladles. Linear equations forthese relations are presented. Further calculations have shown that these linear equations also are able to predict velocities for a conical ladle. © 1999 ISIJ.

  • 331.
    Alexis, Jonas
    et al.
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    Jönsson, Pär
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    A model of an inductively-stirred ladle1997In: Scandinavian journal of metallurgy, ISSN 0371-0459, E-ISSN 1600-0692, Vol. 26, no 2, p. 48-54Article in journal (Refereed)
    Abstract [en]

    A fully 3-dimensional model for an inductively-stirred ladle is presented. Since the fluid flow during induction stirring is not symmetric with respect to the centre of the ladle, this model gives a more accurate description of the real stirring conditions than more traditional models that use cylindrical or polar co-ordinates. Typical output from the model are steel velocities, turbulent kinetic energy and dissipation of turbulent kinetic energy. The calculated steel velocities agree fairly well with experimental data. © Munksgaard, 1997.

  • 332.
    Alexis, Jonas
    et al.
    MEFOS − Stiftelsen för Metallurgisk Forskning.
    Ramirez, M.
    Massachusetts Inst. of Technology.
    Trapaga, G.
    Massachusetts Inst. of Technology.
    Jönsson, P.
    Royal Institute of Technology.
    Modeling of a DC Electric Arc Furnace - heat transfer from the arc2000In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 40, no 11, p. 1089-1097Article in journal (Refereed)
    Abstract [en]

    A mathematical model describing heat and fluid flow in an electric arc has been developed and used to predict heat transfer from the arc to the steel bath in a DC Electric Arc Furnace. The arc model takes the separate contributions to the heat transfer from each involved mechanism into account, i.e. radiation, convection, condensation and energy transported by electrons. The model predicts heat transfer for different currents and arc lengths. Model predictions show that arc efficiency is higher for lower power input. The model also predicts shear stresses and current density distribution at the steel surface. This information can be used as boundary condition input to simulate the effect of heating with electrodes in a DC EAF on the heat and fluid flow in the steel bath.

  • 333.
    Alfredsen, Gry
    et al.
    Norwegian Institute of Bioeconomy Research, Norway.
    Pilgard, Annica
    RISE, SP – Sveriges Tekniska Forskningsinstitut. Technical University Munich, Germany.
    Fossdal, Carl Gunnar
    Norwegian Institute of Bioeconomy Research, Norway.
    Characterisation of Postia placenta colonisation during 36 weeks in acetylated southern yellow pine sapwood at three acetylation levels including genomic DNA and gene expression quantification of the fungus2016In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 70, no 11, p. 1055-1065Article in journal (Refereed)
    Abstract [en]

    One way to protect timber in service against basidiomycete deterioration is by means of acetylation via reaction with acetic anhydride. The reason why acetylated wood (WAc) is resistant against decay fungi is still not exactly understood. The aim of this study was to contribute to this field of science, and Postia placenta colonisation after 4, 12, 20, 28 and 36 weeks was observed at three acetylation levels of Pinus spp. sapwood. Mass loss (ML) and wood moisture content (MC) data reflected the acetylation levels. The initial equilibrium MC (EMC) proved to be a good indicator of subsequent ML. Genomic DNA quantification showed P. placenta colonisation in all samples, also in samples where no ML were detectable. The number of expressed gene transcripts was limited, but the findings supported the results of previous studies: WAc seems to have some resistance against oxidative mechanisms, which are part of the metabolism of P. placenta. This leads to a delay in decay initiation, a delay in expression of genes involved in enzymatic depolymerisation, and a slower decay rate. The magnitudes of these effects are presented for each acetylation level. The data also imply that there is no absolute decay threshold at high acetylation levels, but instead a significant delay of decay initiation and a slower decay rate.

  • 334. Alfredsen, Gry
    et al.
    Pilgård, Annica
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, Trätek.
    Effects of leaching on Postia placenta decay of acetic anhydride treated wood2013In: Proceedings of the 9th Meeting of the Northern European Network for Wood Science and Engineering, 2013, , p. 209-214Conference paper (Other academic)
  • 335.
    Alfredsen, Gry
    et al.
    Norwegian Forest and Landscape Institute, Norway.
    Pilgård, Annica
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Hållbar Samhällsbyggnad.
    Postia placenta decay of acetic anhydride modified wood – effect of leaching2014In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 9, no 3, p. 162-169Article in journal (Refereed)
    Abstract [en]

    It is well established that acetylation of wood by the use of acetic anhydride is able to impart a significant degree of decay resistance. The aim of this work was to study how a standardized leaching procedure with water (EN 84) affected the degradation of acetic anhydride modified samples by the brown rot fungi Postia placenta compared to no leaching prior to incubation. Three different levels (low, medium, and high) of acetic anhydride modified Southern yellow pine (SYP; Pinus spp.) were tested. The samples were harvested after 4 and 28 weeks. Wecompared changes in mass loss, wood moisture content, fungal DNA, and gene expression from five genes. If leaching changes the acetylated samples and makes them more susceptible for fungal deterioration, the expected effect would be higher levels of these parameters. Generally, leaching resulted in few differences between leached and nonleached samples at low levels of acetylation, while no changes were found for the highest acetylation level. No differences were found in gene expressions after 28 weeks. The possible protection of acetylated wood against oxidative fungal degradation is suggested to be interpreted in combination with the lowered wood moisture content.

  • 336. Alfredsen, Gry
    et al.
    Pilgård, Annica
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, Trätek.
    Hietala, Ari
    A step towards a better understanding of fungal colonization of modified wood - QRT-PCR studies2010In: Proceedings of IRG Annual Meeting, 2010, , p. 9Conference paper (Other academic)
  • 337.
    Alfredsen, Gry
    et al.
    Norwegian Forest and Landscape Institute, Norway.
    Ringman, Rebecka
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Pilgård, Annica
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Hållbar Samhällsbyggnad. Technical University of Munich, Germany.
    Fossdal, Carl Gunnar
    Norwegian Forest and Landscape Institute, Norway.
    New insight regarding mode of action of brown rot decay of modified wood based on DNA and gene expression studies: A review2015In: International Wood Products Journal, ISSN 2042-6445, E-ISSN 2042-6453, Vol. 6, no 1, p. 5-7Article in journal (Refereed)
    Abstract [en]

    Modified wood shows resistance against wood deteriorating fungi, but the mechanisms are still not fully understood. The aim of this paper was to summarise the molecular studies performed on modified wood with regard to brown rot decay fungi. The DNA data showed that fungi are present inside the laboratory wood test samples already after two weeks of inoculation. Generally the fungal DNA content reflects mass loss and wood moisture content. The oxidative gene expression seems to be higher in modified wood than in untreated wood and it tend to increase during incubation. Based on the gene expression data we suggest that the hypothesis of lack of substrate recognition by the fungus should be rejected. In the reviewed studies, total wood moisture content in the samples was generally not low enough to inhibit fungal colonisation. Hence, moisture distribution within the wood should be studied more closely.

  • 338. Alfredsen, Gry
    et al.
    Westin, Mats
    SP - Sveriges Tekniska Forskningsinstitut / Trätek.
    Durability of modified wood – Laboratory vs field performance2009In: Proceedings of The Fourth European Conference on Wood Modification., SP Technical Research Institute of Sweden , 2009, , p. 515-522Conference paper (Other academic)
  • 339.
    Alfredson, J.
    et al.
    SAAB, Sweden.
    Johansson, B. J. E.
    Linköping University, Sweden.
    Trabasso, L. G.
    Aeronautics Institute of Technology, Brazil.
    Schminder, J.
    Linköping University, Sweden.
    Granlund, R.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Gårdhagen, R.
    Linköping University, Sweden.
    Design of a distributed human factors laboratory for future air systems2018In: 31st Congress of the International Council of the Aeronautical Sciences, ICAS 2018, 2018Conference paper (Refereed)
    Abstract [en]

    This paper presents a rationale for structuring a distributed human factors laboratory for future air systems. The distributed herein refers to two aspects: content and geographic. As for content, the laboratory is structured in two levels, namely, individual, and team. As for geographic, the laboratory infrastructure is distributed in three physically separate facilities, namely, Department of Computer and Information Science (IDA) and Department of Management and Engineering (IEI) from Linköping University - Sweden and the Competence Center in Manufacturing from the Aeronautics Institute of Technology (ITA) - Brazil.

  • 340.
    Alfredsson, Robert
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Polymer och fiber.
    Jarl, Marie-Louice
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Polymer och fiber.
    Bestämning av sammansättning hos PVC-produkter från gamla hus.1999Report (Refereed)
  • 341.
    Alfthan, Johan
    RISE, Innventia.
    Experimental study of non-linear stress relaxation and creep of paper materials and the relation between the two types of experiments2010In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 25, no 3, p. 351-357Article in journal (Refereed)
    Abstract [en]

    The non-linear time-dependent mechanical behaviour of three different commercial paper grades was investigated. Stress relaxation and creep tests were carried out in MD and CD using different load levels. The strain in each test was split in a linear part and a non-linear part. From the stress and the linear part of the strain in the test, a stress relaxation modulus or a creep compliance was calculated. The stress relaxation moduli and creep compliances determined in this way were observed to be independent of the load level. The stress relaxation moduli and creep compliances for each paper were further independent of the loading direction (MD/CD) when scaled by the elastic modulus. It was also shown that the stress relaxation modulus was approximately equal to the inverse of the creep compliance, which is what would have been expected if linear viscoelastic theory had been applicable.

  • 342.
    Alfthan, Johan
    et al.
    RISE, Innventia.
    Björklund, Magnus
    Measuring creep with confidence2014Conference paper (Refereed)
  • 343.
    Algehed, Jessica
    et al.
    foginnovation, Sweden.
    Eneqvist, Erica
    RISE - Research Institutes of Sweden, Built Environment, Energy and Circular Economy.
    Jensen, Christian
    University of Gothenburg, Sweden.
    Lööf, Jenny
    RISE - Research Institutes of Sweden, Built Environment, Energy and Circular Economy.
    Innovation + stadsutveckling = sant?2019In: INNOVATION OCH STADSUTVECKLING : En forskningsantologi om organiseringsutmaningar för stad och kommun / [ed] Jessica Algehed, Erica Eneqvist,Christian Jensen & Jenny Lööf, 2019, p. 5-12Chapter in book (Other academic)
  • 344.
    Algehed, Jessica
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energi och Bioekonomi.
    Winnes, Kajsa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energi och Bioekonomi, Systemanalys.
    Miljökultur: vad vet forskarna om kulturens och tjänsternas miljöpåverkan2010Report (Refereed)
    Abstract [sv]

    Denna rapport är en översikt av vad vi har funnit hittills i den vetenskapliga litteraturen om kulturens och tjänsternas miljöpåverkan.

  • 345.
    Algerbo, Per-Anders
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Lokalt omhändertagande av icke avvattnat avloppsslam1997Report (Refereed)
  • 346.
    Algerbo, Per-Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Dalemo, Magnus
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Sammanfattning av seminariet1997Report (Refereed)
  • 347.
    Algerbo, Per-Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Mattson, Lennart
    Thylén, Lennart
    Skörderelaterad kvävegödsling: teknik, metodik och erfarenheter2003Report (Refereed)
  • 348.
    Algerbo, Per-Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Ringmar, Anders
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Norén, Olle
    Torén, Anna
    Behandling av ventilationsluft från svinstall med ozon: en utvärdering2003Report (Refereed)
  • 349.
    Algerbo, Per-Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Ringmar, Anders
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Torén, Anna
    Luktreducering av gödsel med hjälp av ozon: kompletterande mätningar2001Report (Refereed)
  • 350.
    Algerbo, Per-Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.
    Thylén, Lars
    Utveckling av on-line proteinsensor för skördetröskor2000Report (Refereed)
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