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  • 501.
    Anderson, Johan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Boström, Lars
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Jansson, Robert
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Milovanovic, Bojan
    University of Zagreb, Croatia.
    Modeling of fire exposure in facade fire testing2016In: Interflam 2016: Conference Proceedings, 2016, p. 1115-1126Conference paper (Other academic)
  • 502.
    Anderson, Johan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research.
    Boström, Lars
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research.
    Jansson, Robert
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research.
    Milovanović, Bojan
    University of Zagreb, Croatia.
    Fire dynamics in Façade fire tests: Measurement, modeling and repeatability2015In: Applications of Structural Fire Engineering, Czech Technical University in Prague , 2015Conference paper (Refereed)
    Abstract [en]

    Presented is a comparison between full-scale façade tests where SP Fire 105 and BS 8414-1 were used regarding repeatability and the use of modelling to discern changes in the set-ups. Results show that the air movements around the test set-up (the wind) may have a significant impact on the tests and that the heat exposure to the façade surface will among other depend on the thickness of the test specimen. Also demonstrated was that good results could be obtained by modelling of the façade fire tests giving us the opportunity to use these methods to determine the effect of a change in the experimental setup.

  • 503.
    Anderson, Johan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Jansson, Robert
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Façade Fire Tests – Measurements and Modeling2013In: Proceedings of the 1st International Seminar for Fire Safety of Facades, 2013Conference paper (Refereed)
  • 504.
    Anderson, Johan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Jansson, Robert
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Façade fire tests - Measurements and modeling2013In: 1st International Seminar for Fire Safety of Facades, FSF 2013, 2013, , p. 2003Conference paper (Refereed)
  • 505.
    Anderson, Johan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Jansson, Robert
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Fire dynamics in facade fire tests: Measurements and modelling2013Conference paper (Refereed)
  • 506.
    Anderson, Johan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Lange, David
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Boström, Lars
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Applying uncertainty quantification in modelling of a steel beam exposed to fire2016In: Structures in Fire: Proceedings of the Ninth International Conference, 2016, p. 925-932Conference paper (Other academic)
    Abstract [en]

    Modelling of structures exposed to fires is prone to be heavily influenced by uncertainties in geometrical parameters, thermal material data as well as uncertainties in the boundary conditions. Assessing the effects and influences in variations of all the uncertain parameters is often cumbersome and traditional methods are impractical thus modelling of the total uncertainty is needed. Uncertainty Quantification with deterministic sampling is one possible way ahead to accommodate and evaluating the effects of uncertainties with as few repeated simulations as possible. In this paper the uncertainties stemming from error in the input data and boundary conditions on one example of a steel beam under four point bending exposed to fire is evaluated.

  • 507.
    Anderson, Johan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Lange, David
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Lönnermark, Anders
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Modelling in WFDS of a Wildfire Scenario2016In: Book of Abstracts Nordic Fire & Safety Days 2016, 2016, p. 33-33Conference paper (Other academic)
  • 508.
    Anderson, Johan
    et al.
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Lange, David
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Lönnermark, Anders
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Mindykowski, Pierrick
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Modelling in wfds of a wildfire scenario2017In: 15th International Conference and Exhibition on Fire and Materials 2017, Interscience Communications Ltd , 2017, p. 765-776Conference paper (Refereed)
    Abstract [en]

    In this paper a coarse graining process is used to subsequently model large wildland fires, starting from a model of a single tree. The models are created using Wildland Urban Interface Fire dynamics Simulator (WFDS), and it is here found that reasonable fire spread in small forests can be obtained although the results are quite dependent on grid resolution as well as moisture content. In most realistic scenarios the computational volume is rather large yielding massive amounts of data. In using WFDS a rather small grid size is needed to appropriately model the fire spread this will be a severely limiting factor in creating large models.

  • 509.
    Anderson, Johan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Larsson, Fredrik
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Elektronik.
    Andersson, Petra
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Sveriges tekniska forskningsinstitut / Brandteknik, forskning (BRf ).
    Mellander, Bengt-Erik
    Fire Spread due to Thermal Runaway in a Lithium-ion Battery Cell2014In: Proceedings from 3rd International Conference on Fire in Vehicles - FIVE 2014, 2014, , p. 267-270Conference paper (Other academic)
  • 510.
    Anderson, Johan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Brandmotstånd.
    Larsson, Fredrik
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Elektronik.
    Andersson, Petra
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Sveriges tekniska forskningsinstitut / Brandteknik, forskning (BRf ).
    Mellander, Bengt-Erik
    Thermal modeling of fire propagation in lithium-ion batteries2015In: 24th International Technical Conference on the Enhanced Safety of Vehicles (ESV), 2015, , p. 15-0073Conference paper (Other academic)
  • 511. Anderson, Johan
    et al.
    Sjöström, Johan
    Andersson, Petra
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Sveriges tekniska forskningsinstitut / Brandteknik, forskning (BRf ).
    Amon, Francine
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Sveriges tekniska forskningsinstitut / Brandteknik, forskning (BRf ).
    Albrektsson, Joakim
    Experimental and Numerical Characterization of an Electrically Propelled Vehicles Battery Casing Including Battery Module2014In: Journal of Thermal Science and Engineering Applications, Vol. 6, no 4, p. 41015-Article in journal (Refereed)
    Abstract [en]

    This paper demonstrates the possibility to predict a battery system's performance in a fire resistance test according to the new amendment of United Nations Regulation No. 100 "Uniform Provisions Concerning the Approval of Vehicles with Regard to Specific Requirements for the Electric Power Train" (R100) based on careful measurements of the physical properties of the casing material, as well as modeling of the battery modules and computer simulations. The methodology of the work consists of estimating the heat transfer coefficients by using a gasoline pool fire model in the computational fluid dynamics (CFD) software FIRE DYNAMICS SIMULATOR (FDS), followed by finite-element (FE) calculations of the temperatures in the battery.

  • 512.
    Anderson, Johan
    et al.
    RISE - Research Institutes of Sweden, Safety and Transport.
    Sjöström, Johan
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Lönnermark, Anders
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Persson, Henry
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Larsson, Ida
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Assessment of Self-Heating in Wood Pellets by FE Modelling2017Conference paper (Refereed)
    Abstract [en]

    The self-heating process in a laboratory scale experiment has been modelled using the Comsol Multiphysics software. In the simulations the gas flow and air movement in the volume and heat diffusion in the bulk were taken into account however only one reaction in the pellets bulk is considered. The input data is found from measurements of the reaction chemistry and the heat transfer properties. It is found that all relevant physics is needed in order to obtain reasonable predictions in particular the heat transfer between the bulk and the gas is important but also condensation and evaporation of moisture.   

  • 513.
    Anderson, Johan
    et al.
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Sjöström, Johan
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Temple, Alastair
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Charlier, Marion
    ArcelorMittal, Sweden.
    Xu, Dai
    University of Edinburgh, UK.
    Welch, Stephen
    University of Edinburgh, UK.
    Rush, David
    University of Edinburgh, UK.
    FDS SIMULATIONS AND MODELLING EFFORTS OF TRAVELLING FIRES IN A LARGE ELONGATED COMPARTMENT2019In: Interflam 2019, proceedings / [ed] Stephen Grayson, Interscience Communications, 2019, Vol. 15, p. 2085-Conference paper (Refereed)
    Abstract [en]

    The present paper investigates a travelling fire scenario in an elongated structure (Length 18 m x width 6 m x height 3 m) with a controlled fire source of six pans filled with diesel (width 4 m x length 0.5 m). The fire spread is controlled manually by initiating fires subsequently in the pools. Fire Dynamics Simulator (FDS) is used to a-priori investigate variations in geometry, material data and fire load whereas simulations using the final design were performed after the test. The input to the model beside fire source and geometry are thermal material data. The FDS simulation were used to determine the appropriate size of the downstands (2 m from the ceiling in the final design) on the side to create a sufficiently one-dimensional fire spread. The post test simulations indicate that although there are a lot of variations not included in the model similar results were obtained as in the test.

  • 514. Anderson, R.
    Characteristics of the bacterial flora isolated during spontaneous lactic acid-fermentation of carrots and red beets.1984In: Lebensmittel-Wissenschaft und Technologie, Vol. 17, no 5, p. 282-286Article in journal (Refereed)
  • 515.
    Andersons, J.
    et al.
    University of Latvia.
    Sparniņš, E.
    University of Latvia.
    Nyström, Birgitha
    RISE - Research Institutes of Sweden, Materials and Production, SICOMP.
    Joffe, Roberts
    RISE - Research Institutes of Sweden, Materials and Production, SICOMP.
    Scale effect of the tensile strength of flax-fabric-reinforced polymer composites2011In: Journal of reinforced plastics and composites (Print), ISSN 0731-6844, E-ISSN 1530-7964, Vol. 30, no 23, p. 1969-1974Article in journal (Refereed)
    Abstract [en]

    The development of UD natural fiber composites, considered for application as structural materials, necessitates evaluation of the scale effect of their strength. Alignment of the fibers in flax bast fiber composites can be achieved by employing textile reinforcement, such as yarns and fabrics. Cutting specimens for mechanical tests out of such textile-reinforced composite plates results in a complex non-uniform reinforcement structure at their edges, which may affect the strength of specimens. Scale effect of the tensile strength in the fiber direction of flax-fabric-reinforced composites is studied in the current work. A model accounting for both volume and edge effect of the specimens on their tensile strength is proposed. © The Author(s) 2011.

  • 516.
    Andersson, A
    SIK – Institutet för livsmedel och bioteknik.
    Bacillus cereus : adhesion ability to biological and non-biological surfaces, enterotoxins, characterization1998Report (Refereed)
  • 517.
    Andersson, A
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedelsforskning.
    Bacillus cereus, strategy for survival : a litterature review1995Report (Refereed)
  • 518.
    Andersson, Anders
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Bäst mäta utan fel2006In: Process Nordic, no 11Article in journal (Other academic)
  • 519.
    Andersson, Anders
    RISE - Research Institutes of Sweden, ICT, SICS.
    Capacity Study of Statistical Multiplexing for IP Telephony2000Report (Other academic)
    Abstract [en]

    Transmitting telephone calls over the Internet causes problems not present in current telephone technology such as packet loss and delay due to queueing in routers. In this undergraduate thesis we study how a Markov modulated Poisson process is applied as an arrival process to a multiplexer and we study the performance in terms of loss probability. The input consists of the superposition of independent voice sources. The predictions of the model is compared with results obtained with simulations of the multiplexer made with a network simulator. The buffer occupancy distribution is also studied and we see how this distribution changes as the load increases.

  • 520.
    Andersson, Anders
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Dosin - A new Pump Device. Its Construction and Function.2007In: Uppsala Journal of Medical Science, Vol. 112, no 1, p. 83-93Article in journal (Other academic)
    Abstract [en]

    ABSTRACT The research and development of the Dosin® and the medical injection system in which it is used was initiated in response to a demand for a new and improved method of delivering fluids to patients. The key requirement was to make the use of refillable syringes obsolete in a cost- effective and user-friendly alternative. Most syringes, despite their accurate delivery quotas, have a limited volume that necessitates frequent monitoring and filling or changing. This very act is time consuming and potentially dangerous in inexperienced hands. The new principle of the device makes it capable of delivering (medical) fluids of various consistencies in extremely precise amounts regardless of the fluid viscosity. The outlet of the Dosin® goes through another innovation, the bubble detector, which detects any change in direction of a light beam that passes through the content of the outlet. Thus, should an air bubble enter the outflow and hence be about to enter the blood stream of a patient, the flow of fluid will halt immediately and an alarm will notify the user of the problem.The cyclic flow is useful in interventional radiology since it prevents clotting and increases the mixing with the blood. The flow rate varies from 0.03 mL/s to 5 mL/s and it is recommended to use fluid with a viscosity lower than 3 mPa.s. The outlet pressure is recommended below 300 mm Hg. The Dosin® must be replaced after each patient, alternatively after maximum 24h continuous use.

  • 521.
    Andersson, Anders
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Gastrointestinal Radiological Investigations with a New Pump Device: Experimental and Clinical Experiences2008In: Ups J Med Sci., Vol. 113, no 1, p. 73-8Article in journal (Other academic)
    Abstract [en]

    In an earlier paper (1) a new pump device for medical applications was described. This enabled a continuous flow of saline, barium contrast agent and gases. We now report further study of this device: The use of gases was experimentally studied to give a basis for use in CT-colonography. We also report experiences from injection of barium contrast agent via a naso-duodenal tube for radiological investigation of the small intestine in patients with gastrointestinal suffering. The radiation exposure to the x-ray staff was reduced. The investigation procedure was standardised and shortened.

  • 522.
    Andersson, Anders
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Inventory and basic evaluation of field calibration methods for volume and flow meters Nordtest 1590-022004Report (Refereed)
  • 523.
    Andersson, Anders
    RISE - Research Institutes of Sweden, ICT, SICS.
    SAGA -- Syntax Analyzer Generator for Agents1995Report (Other academic)
    Abstract [en]

    LALR(1) parser generators in conjunction with imperative programming languages is the standard solution for parsing applications. Contrary to popular belief, this situation is not entirely satisfactory. With imperative tools like Yacc, it is difficult to add actions to a grammar without introducing conflicts. Also, LALR(1) is not powerful enough to meet the needs of languages like C++. We argue that LALR(1) parsing in conjuction with concurrent constraint programming is an interesting option that solves the former problem. We also show how deep guards and don't-know non-determinism can be exploited to solve the latter problem. These ideas have been incorporated in the Saga parser generator described in this report. Saga is an integrated generator for lexical analyzers and parsers. It is based on AKL, a multiparadigm programming language based on a concurrent constraint framework. It is intended both as a research tool to demonstrate the power offered by concurrent constraints, and as a practical tool for the Agents programming system. As a practical tool, Saga features many improvements over tools like Yacc. For example, Saga offers powerful syntax, elegant reporting and resolution of conflicts and powerful error handling in the generated syntax analyzers.

  • 524.
    Andersson, Anders
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Viktigt att välja rätt FLÖDESMÄTARE2008In: Energi & miljö, no 11, p. 90-Article in journal (Other (popular science, discussion, etc.))
  • 525. Andersson, Anders
    et al.
    Holmsten, Magnus
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    Mätteknik för processindustrin2017 (ed. 5)Book (Other academic)
    Abstract [sv]

    Hur varmt är det i tanken? Vilket tryck ger pumpen? Det är två exempel på frågor som kan besvaras med processmätteknik.Att mäta är att veta, sägs det, men det gäller ocksåatt veta hur bra man mäter! Felaktiga mätresultat skaparproblem, osäkerhet och kan rent av vara farliga.I den här boken får du hjälp att undvika mätfel, du fårlära dig om olika mätprinciper och hur mätare av olika slagbäst används och monteras. Främst handlar det om temperatur,tryck, flöde och nivå men även annat som finns i enprocessindustri. Du får kunskap om kalibrering, spårbarhetoch mätosäkerhet, och samtidigt om saker runt omkringmätinstrumenten, till exempel CE-märkning, elstörningar,explosionsskydd, skrivregler, signalöverföring, standardermed mera

    Innehållsförteckning:  1: Mätteknik 2: Lästips – Gör så här 3: Mått i historien 4: CE-märkning 5: SI-systemet 6 :Signalöverföring 7: Säkerhet 8: Mätosäkerhet A 9: Fysik och matematik 10: Mättekniska begrepp 11: Temperaturmätning 12: Tryckmätning 13: Flödesmätning 14:Nivåmätning 15: Värmemätning 16: Vakter och larm 17:Serviceinstrument 18:Konduktivitetsmätning 19: pH-mätning 20: Densitetsmätning 21: Vägning 22: Fuktmätning 23: Mätosäkerhet B 24: Kalibrering 25: Pumpar och ventiler 26: Rörledningar 27: Mätosäkerhet C 28: Tabeller 29:Index

  • 526.
    Andersson, Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Holmsten, Magnus
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Lau, Peter
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    VVS 2000 Tabeller & Diagram2004In: Handbok i Mätteknik, 2004, p. 64-Chapter in book (Other (popular science, discussion, etc.))
  • 527.
    Andersson, Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Mattiasson, Kerstin
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Holmsten, Magnus
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Lidbeck, Mats
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Jonasson, Viktoria
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Massa, kraft, längd och tryck.
    Magnusson, Bertil
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Oorganisk kemi (Kmoo).
    Mätteknik för processindustrin2010Report (Refereed)
    Abstract [sv]

    En lärobok (främst riktad till yrkeshögskolan) om hur man undviker mätfel, om olika mätprinciper och om hur mätutrustning av olika slag bäst används och monteras. Främst handlar det om temperatur, tryck, flöde och nivå men även annat som finns i en processindustri.

  • 528. Andersson, Anne
    High Power Fibre Optic Calibration. Final report2004Report (Refereed)
  • 529.
    Andersson, Anne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    High Power Fibre Optic Calibration. Nordtest project 1654-032004Report (Refereed)
  • 530.
    Andersson, Anne
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Källberg, Stefan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Intercomparison of transmittance measurements on V(λ) filter. EUROMET PROJECT 3532004Report (Refereed)
  • 531.
    Andersson, Anne
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Svensson, Ingemar
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Camera-based Colour Contrast Evaluation2012Report (Refereed)
    Abstract [en]

    This project studies whether or not a digital camera can be used to evaluate colour difference or colour contrast. When characterizing a test object that changes colour over time it is not always possible to do a normal colour measurement with a spectroradiometer. The alternative could be to use film or rapid fire photography to record the changes and extract the colour data from the digital information. This project involves development of a method where spectroradiometric data of a colour chart is compared to digital data taken from photos and film of the same colour chart using Photoshop. In each measurement 22 colours have been evaluated by calculating the colour difference between a direct spectroradiometric measurement of a single colour and data taken from Photoshop of that same colour. The data is compared in the CIELAB colour space using the ?E94 metric which should faithfully represent how the human eye perceives colour difference. Three sets of measurements are made .Two sets where the spectroradiometric data is compared to data from still photos, first with photos directly from the camera and then with RAW-data from the camera. The third measurement compared the spectroradiometric data with data from a frame from a video. The results show that the 22 colours are reproduced with varying degrees of accuracy in photos and video compared to a direct measurement using a spectroradiometer. For the two photo measurements the results span from ?E94 = 0.82 for the best colour reproduction to ?E94 = 17.01 for the worst reproduction. The average deviation was ?E94 = 7.48 and ?E94 = 8.46 respectively where a colour difference of ?E94 =1.0 is considered a just noticeable difference. For video the deviation spans from ?E94 = 4.89 to ?E94 = 18.11 with an average deviation of ?E94 = 11.59. ?E94 has also been used to evaluate how the colour contrast between two different colours differ between the spectroradiometric measurement and data from Photoshop. The results show that for photos the colour contrast deviates quite a bit between the two methods. A deeper evaluation of the video method shows that as long as the contrast between two colours is small the deviation compared to the spectroradiometric measurement will also be small.

  • 532.
    Andersson, Annika
    et al.
    SIK – Institutet för livsmedel och bioteknik.
    Granum, P.E.
    Rönner, Ulf
    SIK – Institutet för livsmedel och bioteknik.
    The adhesion of Bacillus cereus spores to epithelial cells might be an additional virulence mechanism1998In: International Journal of Food Microbiology, ISSN 0168-1605, E-ISSN 1879-3460, Vol. 39, no 42006, p. 93-99Article in journal (Refereed)
    Abstract [en]

    Four out of ten Bacillus cereus strains produced spores able to adhere to monolayers of Caco-2 cells (human epithelial cells). One of these strains has been involved in an outbreak of food poisoning where the symptoms were more severe and persisted for longer than a normal B. cereus food poisoning. The hydrophobicity of the spores is a contributing factor for the adhesion to occur. The spores are able to germinate in an environment similar to that of the small intestine and then the vegetative cells can produce the enterotoxin directly at the target place. A concentrated and active form of the enterotoxin will be taken up by the epithelial cells in the small intestine. Spore adhesion could be an important virulence factor for some B. cereus strains.

  • 533.
    Andersson, Annika
    et al.
    SIK – Institutet för livsmedel och bioteknik.
    Granum, Per Einar
    Rönner, Ulf
    SIK – Institutet för livsmedel och bioteknik.
    Adhesion of Bacillus cereus spores to epithelial cells might be an additional virulence mechanism1998In: International Joural of food microbiology, ISSN 0346-718X, Vol. 39, no 1-2, p. 93-9Article in journal (Refereed)
    Abstract [en]

    Four out of ten Bacillus cereus strains produced spores able to adhere to monolayers of Caco-2 cells (human epithelial cells). One of these strains has been involved in an outbreak of food poisoning where the symptoms were more severe and persisted for longer than a normal B. cereus food poisoning. The hydrophobicity of the spores is a contributing factor for the adhesion to occur. The spores are able to germinate in an environment similar to that of the small intestine and then the vegetative cells can produce the enterotoxin directly at the target place. A concentrated and active form of the enterotoxin will be taken up by the epithelial cells in the small intestine. Spore adhesion could be an important virulence factor for some B. cereus strains.

  • 534.
    Andersson, Annika
    et al.
    SIK – Institutet för livsmedel och bioteknik.
    Rönner, Ulf
    SIK – Institutet för livsmedel och bioteknik.
    Adhesion and removal of dormant, heat-activated, and germinated spores of three strains of Bacillus cereus1998In: Biofouling (Print), ISSN 0892-7014, E-ISSN 1029-2454, Vol. 13, no 1, p. 51-67Article in journal (Refereed)
    Abstract [en]

    As the spores of Bacillus cereus are known to be very adhesive, the cleaning processes used to eliminate them are often inefficient. This study investigated how adhesion and removal of spores varied among strains of the species B. cereus. The adhesion and removal of spores during their life cycle were also examined. Spores of three different strains of B. cereus, viz. NVH 61, 1AM 1110 and NCTC 2599, were used. IAM 1110 spores adhered in greater numbers than spores of the other two strains and were the most hydrophobic; four times as many spores of this strain adhered than of the least adhesive spores, NCTC 2599. Spores of both these strains have an exosporium and appendages, but as the relative hydrophobicity varies, there are probably differences in their chemical composition. It was also found that dormant spores were 33-48% more adhesive than germinated spores. There were no obvious differences in adhesion between dormant and heat-activated spores. Up to 80% of the germinated spores could be removed from the surfaces tested. Dormant and heat-activated spores on the other hand were difficult to remove from the surfaces. When siliconized glass surfaces were coated with milk, germinated spores were still the easiest to remove but the difference was not as marked as before. Therefore, this work suggests that cleaning processes should take into consideration factors that boost spore germination in order to improve the cleaning.

  • 535.
    Andersson, Annika
    et al.
    SIK – Institutet för livsmedelsforskning.
    Rönner, Ulf
    SIK – Institutet för livsmedelsforskning.
    Granum, P.E.
    What problems does the food industry have with the spore-forming pathogens Bacillus cereus and Clostridium perfringens?1995In: International Journal of Food Microbiology, ISSN 0168-1605, E-ISSN 1879-3460, Vol. 28, no 2, p. 145-155Article in journal (Refereed)
  • 536.
    Andersson, Annika
    et al.
    SIK – Institutet för livsmedel och bioteknik.
    Rönner, Ulf
    SIK – Institutet för livsmedel och bioteknik.
    Granum, Per Einar
    What problems does the food industry have with the spore-forming pathogens Bacillus cereus and Clostridium perfringens?1995In: International Journal of Food Microbiology, ISSN 0346-718X, Vol. 28, no 2, p. 14-55Article in journal (Refereed)
    Abstract [en]

    Spore-forming Bacillus cereus and Clostridium perfringens bacteria are special problems for the dairy and meat industry, respectively. Proper cleaning and disinfection with hypochlorite is essential to avoid high numbers of these bacteria in food products. It is impossible for B. cereus and C. perfringens to cause food poisoning with cooking and rapid cooling, and proper reheating. It is also important to note that the generation time for C. perfringens can be as short as 8 min under optimal conditions, so temperatures between 10 and 47 °C in any meat product must be restricted. B. cereus food poisoning through milk and milk products can be avoided with a low number of spores in the products and proper cooling.

  • 537.
    Andersson, Annika
    et al.
    SIK – Institutet för livsmedel och bioteknik.
    Svensson, B.
    Christiansson, A.
    Rönner, Ulf
    SIK – Institutet för livsmedel och bioteknik.
    Comparison between automatic ribotyping and random amplified polymorphic DNA analysis of Bacillus cereus isolates from the dairy industry1999In: International Journal of Food Microbiology, ISSN 0168-1605, E-ISSN 1879-3460, Vol. 47, no 42006, p. 147-151Article in journal (Refereed)
    Abstract [en]

    Discrimination by automatic ribotyping and random amplified polymorphic DNA PCR, RAPD, was compared for 40 different B. cereus dairy isolates, 4 different B. mycoides isolates and 6 culture collection strains. RAPD-PCR has previously shown to be useful for tracing contamination routes of B. cereus to milk. Automatic ribotyping using EcoRI and PvuII separated the B. cereus and B. mycoides isolates/strains into 36 different ribotypes. RAPD-typing with primers generated 40 different RAPD-profiles. However, 17 isolates clustered into eight groups, irrespective of the primer and restriction enzyme used, and in all but one case, the isolates with the same pattern were isolated from the same dairy. Automatic ribotyping proved to be a useful, standardized and quick method to discriminate between B. cereus strains, only slightly less discriminatory than RAPD-typing.

  • 538.
    Andersson, Annika
    et al.
    SIK – Institutet för livsmedel och bioteknik.
    Svensson, Birgitta
    Christiansson, Anders
    Rönner, Ulf
    SIK – Institutet för livsmedel och bioteknik.
    Comparison between automatic ribotyping and random amplified polymorphic DNA analysis of Bacillus cereus isolates from the dairy industry1998In: International journal of food microbiology, ISSN 0346-718X, Vol. 47, no 1-2, p. 147-51Article in journal (Refereed)
    Abstract [en]

    Discrimination by automatic ribotyping and random amplified polymorphic DNA PCR, RAPD, was compared for 40 different B. cereus dairy isolates, 4 different B. mycoides isolates and 6 culture collection strains. RAPD-PCR has previously shown to be useful for tracing contamination routes of B. cereus to milk. Automatic ribotyping using EcoRI and PvuII separated the B. cereus and B. mycoides isolates/strains into 36 different ribotypes. RAPD-typing with primer 1 (5?-CCGAGTCCA-3?) and primer 2 (5?-CCGGCGGCG-3?) generated 40 different RAPD-profiles. However, 17 isolates clustered into 8 groups, irrespective of the primer and restriction enzyme used and in all but one case, the isolates with the same pattern were isolated from the same dairy. To conclude RAPD-typing was only slightly more discriminatory than automatic ribotyping and therefore automatic ribotyping proved to be a useful, standardized and quick method to discriminate between B. cereus strains. As the two methods are based on completely different genetic properties, one of the methods can be used to confirm the results from the other method, when identity among isolates needs to be verified.

  • 539.
    Andersson, Anton
    et al.
    Luleå University of Technology, Sweden.
    Gullberg, Amanda
    RISE - Research Institutes of Sweden, Swerea, Swerea MEFOS.
    Kullerstedt, Adeline
    RISE - Research Institutes of Sweden, Swerea, Swerea MEFOS.
    Sandberg, Erik
    RISE - Research Institutes of Sweden, Swerea, Swerea MEFOS.
    Andersson, Mats
    SSAB Europe, Sweden.
    Ahmed, Hasham
    Luleå University of Technology, Sweden ; Central Metallurgical Research and Development Institute, Egypt.
    Sundqvist-ökvist, Lena
    RISE - Research Institutes of Sweden, Swerea, Swerea MEFOS. Luleå University of Technology, Sweden.
    Björkman, Bo
    Luleå University of Technology, Sweden.
    A holistic and experimentally-based view on recycling of off-gas dust within the integrated steel plant2018In: Metals, ISSN 2075-4701, Vol. 8, no 10, article id 760Article in journal (Refereed)
    Abstract [en]

    Ore-based ironmaking generates a variety of residues, including slags and fines such as dust and sludges. Recycling of these residues within the integrated steel plant or in other applications is essential from a raw-material efficiency perspective. The main recycling route of off-gas dust is to the blast furnace (BF) via sinter, cold-bonded briquettes and tuyere injection. However, solely relying on the BF for recycling implicates that certain residues cannot be recycled in order to avoid build-up of unwanted elements, such as zinc. By introducing a holistic view on recycling where recycling via other process routes, such as the desulfurization (deS) station and the basic oxygen furnace (BOF), landfilling can be avoided. In the present study, process integration analyses were utilized to determine the most efficient recycling routes for off-gas dust that are currently not recycled within the integrated steel plants of Sweden. The feasibility of recycling was studied in experiments conducted in laboratory, pilot, and full-scale trials in the BF, deS station, and BOF. The process integration analyses suggested that recycling to the BF should be maximized before considering the deS station and BOF. The experiments indicated that the amount of residue that are not recycled could be minimized.

  • 540.
    Andersson, Anton
    et al.
    Luleå University of Technology, Sweden.
    Gullberg, Amanda
    RISE - Research Institutes of Sweden, Materials and Production, Swerea MEFOS.
    Kullerstedt, Adoline
    RISE - Research Institutes of Sweden, Materials and Production, Swerea MEFOS.
    Ahmed, Hesham
    Luleå University of Technology, Sweden; Central Metallurgical Research and Development Institute, Egypt.
    Sundqvist-Ökvist, Lena
    RISE - Research Institutes of Sweden, Materials and Production, Swerea MEFOS. Luleå University of Technology, Sweden.
    Samuelsson, Caisa
    Luleå University of Technology, Sweden.
    Upgrading of Blast Furnace Sludge and Recycling of the Low-Zinc Fraction via Cold-bonded Briquettes2019In: Journal of Sustainable Metallurgy, ISSN 2199-3823Article in journal (Refereed)
    Abstract [en]

    Depending on the operation of the blast furnace (BF), the main outlet of zinc from the furnace is more or less via the BF dust and sludge. As the dust is recycled to the BF, the sludge has to be de-zinced prior to recycling to prevent the accumulation of zinc in the BF. De-zincing and recycling of the low-zinc fraction via sinter have been reported. However, no research concerning recycling of upgraded BF sludge via cold-bonded briquettes has been performed. In the present study, a fine-grained BF sludge with low zinc content, generated by a BF operating on a ferrous burden of 100% pellets, was upgraded using the tornado process. The process simultaneously dried and separated the BF sludge into a high-zinc and a low-zinc fraction. The feasibility of recycling the low-zinc fraction to the BF using cold-bonded briquettes was studied on a laboratory-scale BF shaft simulator. On comparison with a reference briquette, the experiments indicated that 10 wt% of the upgraded BF sludge can be added to the briquette without negatively affecting the reducibility. Higher additions were found to render the briquette less reduced compared to the reference under test conditions corresponding to the central part of the BF. The strength of the briquettes was not compromised with the addition of the upgraded BF sludge, and a decision to study the briquettes in the LKAB experimental blast furnace was made in order to evaluate the behavior under actual BF conditions.

  • 541.
    Andersson, B
    et al.
    Organisk kemi (Kmo).
    Jonsson, Bengt
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Certifiering.
    Karlsson, J
    Organisk kemi (Kmo).
    Analys av kvicksilver i kol, olja, rökgas och askor1990Report (Refereed)
  • 542.
    Andersson, B.
    et al.
    Aeronautical Research Institute of Sweden.
    Sjögren, Anders
    RISE, Swerea, Swerea SICOMP.
    Berglund, L.
    Luleå University of Technology.
    Micro- and meso-level residual stresses in glass-fiber/vinyl-ester composites2000In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 60, no 10, p. 2011-2028Article in journal (Refereed)
    Abstract [en]

    Residual stresses in glass-fiber composites were studied on the micro and meso scales by computational and experimental methods. Transmitted polarized light images of thin sections were compared with 3D finite-element solutions of a sample containing 1410 fibers. Calculated point-wise stresses were derived from a linear thermoelastic model with negligibly small numerical errors. Regions with calculated maximum compressive stresses showed good agreement with experimentally observed optical bands. A material with poor interfacial adhesion showed weaker optical effects indicating fiber/matrix debonding. On the basis of these results it seems likely that irreversible matrix deformation and debonding can take place in the curing phase. (C) 2000 Elsevier Science Ltd. All rights reserved.Residual stresses in glass-fiber composites were studied on the micro and meso scales by computational and experimental methods. Transmitted polarized light images of thin sections were compared with 3D finite-element solutions of a sample containing 1410 fibers. Calculated point-wise stresses were derived from a linear thermoelastic model with negligibly small numerical errors. Regions with calculated maximum compressive stresses showed good agreement with experimentally observed optical bands. A material with poor interfacial adhesion showed weaker optical effects indicating fiber/matrix debonding. On the basis of these results it seems likely that irreversible matrix deformation and debonding can take place in the curing phase.

  • 543.
    Andersson, Bengt-Olof
    et al.
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    Eklund, Gunnar
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    Bergsten, Tobias
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    Calibration of Gain Ratios on nV-Meters with the Reference Step Method2018In: CPEM 2018 - Conference on Precision Electromagnetic Measurements, 2018Conference paper (Refereed)
    Abstract [en]

    The Reference Step Method for calibrators can be modified for calibration also of the gain ratios on a meter. The method has earlier been evaluated in the range 100 mV-1000 V on DMM HP 3458A1 and shows that an accuracy of typically < ± 0.2 μ V/V could be obtained. We have investigated the performance of the method when calibrating ratios in the range 1 mV-100 mV on two common nV-meters. In our comparisons with the Josephson Voltage Standard the differences are within ± ± 12μ V/V at the ratio 10m V:1mV and within ± ± 1.3μ V/V at 100mV:10mV.

  • 544.
    Andersson, Bengt-Olof
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Elektricitet.
    Gunnarsson, Ove
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Elektricitet.
    Rydler, Karl-Erik
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Elektricitet.
    A simple build-up method for the DC voltage scale of a source2012In: Conference on Precision Electromagnetic Measurements, CPEM 2012, 2012, , p. 498-499Conference paper (Refereed)
  • 545.
    Andersson, Bengt-Olof
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Elektricitet.
    Gunnarsson, Ove
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Elektricitet.
    Rydler, Karl-Erik
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Elektricitet.
    Early, Murray
    Sira, Martin
    Christian, Laurie
    Streit, Jirí
    A Simple Build-Up Method for the DC Voltage Scale of Source2013In: CPEM Digest, ISSN 0589-1485, E-ISSN 2160-0171, p. 498-499Article in journal (Refereed)
  • 546.
    Andersson, Bengt-Åke
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Klämberg, Patrik
    Bestämning av fotodetektor responsivitet i mikrovågsområdet.2001Report (Refereed)
  • 547. Andersson, Berit
    et al.
    Blomqvist, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Sveriges tekniska forskningsinstitut / Brandteknik, forskning (BRf ).
    Dederich, Anne
    Thermal breakdown of extinguishing agents2008Report (Refereed)
  • 548. Andersson, Berit
    et al.
    Blomqvist, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Sveriges tekniska forskningsinstitut / Brandteknik, forskning (BRf ).
    Holmstedt, Göran
    Experimental study of thermal breakdown products from halogenated extinguishing agents2011In: Fire safety journal, ISSN 0379-7112, E-ISSN 1873-7226, Vol. 46, no 3, p. 104-115Article in journal (Refereed)
  • 549.
    Andersson, Bo-Lennart
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Klassificering av atmosfärisk korrosivitet med hjälp av referenskuponger av olika metaller. Rekommenderade rutiner.1999Report (Refereed)
  • 550.
    Andersson, Bo-Lennart
    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.
    Insamling av miljödata vid Statens Provningsanstalt i Borås.1989Report (Refereed)
891011121314 501 - 550 of 20920
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