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Träfflista för sökning "WFRF:(Forsberg Lars A) ;lar1:(kth)"

Sökning: WFRF:(Forsberg Lars A) > Kungliga Tekniska Högskolan

  • Resultat 1-4 av 4
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1.
  • Roland, P, et al. (författare)
  • A database generator for human brain imaging
  • 2001
  • Ingår i: TINS - Trends in Neurosciences. - 0166-2236 .- 1878-108X. ; 24:10, s. 562-564
  • Tidskriftsartikel (refereegranskat)abstract
    • Sharing scientific data containing complex information requires new concepts and new technology. NEUROGENERATOR is a database generator for the neuroimaging community. A database generator is a database that generates new databases. The scientists submit raw PET and fMRI data to NEUROGENERATOR, which then processes the data in a uniform way to create databases of homogenous data suitable for data sharing, met-analysis and modelling the human brain at the systems level. These databases are then distributed to the scientists.
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3.
  • Reyes Forsberg, Diana, et al. (författare)
  • A method for chemical and physical modification of oriented pulp fibre sheets
  • 2022
  • Ingår i: Cellulose. - : Springer Science and Business Media B.V.. - 0969-0239 .- 1572-882X. ; 29:15, s. 8371-8386
  • Tidskriftsartikel (refereegranskat)abstract
    • Wood pulp fibres are promising reinforcements for biocomposites due to their renewable resource origin and mechanical properties. An oriented and dense fibre reinforcement structure is beneficial for biocomposite properties. We present a method of modifying fibres (e.g. to increase strain to failure) in pre-formed oriented high-density paper structures intended for biocomposites or as hot-pressed fibre materials. Mildly delignified, well-preserved holocellulose fibres from softwood are used. Cold alkali treatment (hemicellulose removal) and mercerisation (conversion to cellulose II) were carried out successfully on oriented fibre sheets. Controlled anisotropy and sheet density are achieved from untreated and straight fibres in the sheet formation step. High mechanical properties and increased ductility of mercerised sheets were observed, which may be valuable for hot-pressed fibre materials (E ≈ 7.1 GPa, strength of 108 MPa and strain to failure of 5.3%) and biocomposites. In contrast, modified wood pulp fibres were difficult to orient, resulting in higher sheet porosity and weak interfibre bonding. Graphical abstract: [Figure not available: see fulltext.]. © 2022, The Author(s).
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4.
  • Wågberg, Lars, et al. (författare)
  • Engineering of fibre surface properties by application of the polyelectrolyte multilayer concept. Part I : Modification of paper strength
  • 2002
  • Ingår i: Journal of Pulp and Paper Science (JPPS). - 0826-6220. ; 28:7, s. 222-228
  • Tidskriftsartikel (refereegranskat)abstract
    • Consecutive layers of cationic polyallylamine and anionic polyacrylic acid have been deposited on both unbeaten and beaten fully bleached cellulosic fibres. By preparing sheets of these fibres and by forming 5-10 layers of these polyelectrolytes on the unbeaten fibres, it was possible to develop the same strength as can be achieved by conventional beating. Experiments show that considerable strength improvement can be achieved with this type of treatment also on beaten fibres. Atomic force microscopy investigations of multilayers of the polylectrolytes formed on silicon oxide surfaces showed that the thickness of 10 layers of polyelectrolytes was 52 nm. Since the strength improvement was significant with 5 layers, it is suggested that a 26 nm thick multilayer of polyelectrolytes is sufficient to create a strong joint between fibres. The structure of the polyelectrolyte multilayers formed on the fibres was not determined.
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  • Resultat 1-4 av 4

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