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Sökning: WFRF:(Sun W. H.) > Övrigt vetenskapligt/konstnärligt

  • Resultat 1-10 av 17
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  • Acharya, B. S., et al. (författare)
  • Introducing the CTA concept
  • 2013
  • Ingår i: Astroparticle physics. - : Elsevier BV. - 0927-6505 .- 1873-2852. ; 43, s. 3-18
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The Cherenkov Telescope Array (CTA) is a new observatory for very high-energy (VHE) gamma rays. CTA has ambitions science goals, for which it is necessary to achieve full-sky coverage, to improve the sensitivity by about an order of magnitude, to span about four decades of energy, from a few tens of GeV to above 100 TeV with enhanced angular and energy resolutions over existing VHE gamma-ray observatories. An international collaboration has formed with more than 1000 members from 27 countries in Europe, Asia, Africa and North and South America. In 2010 the CTA Consortium completed a Design Study and started a three-year Preparatory Phase which leads to production readiness of CTA in 2014. In this paper we introduce the science goals and the concept of CTA, and provide an overview of the project. (C) 2013 Elsevier B.V. All rights reserved.
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  • Sun, W., et al. (författare)
  • The influence of collagen density in cellular distribution
  • 2012
  • Ingår i: Journal of Tissue Engineering and Regenerative Medicine. - : Hindawi Limited. - 1932-6254. ; 6:suppl 1, s. 166-166
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Adequate cellular in-growth into biomaterials is one of the fundamental requirements in regenerative medicine. Type-I-collagen is the most commonly used material for soft tissue engineering, because it is nonimmunogenic and a highly porous network for cellular support. However, adequate cell in-growth and cell seeding has been suboptimal. Different densities of collagen scaffolds (0.3% to 0.8% (w/v)) with/without polymer knitting (poly-caprolactone (PCL)) were prepared. The structure of collagen scaffolds was characterized using scanning electronic microscopy (SEM) and HE staining. The mechanical strength of hybrid scaffolds was determined using tensile strength analysis. Cellular penetration and interconnectivity were evaluated using fluorescent bead distribution and human bladder smooth muscle cells and urothelium seeding. SEM and HE analysis showed the honeycomb structure and the hybrid scaffolds were adequately connected. The hybrid scaffolds were much stronger than collagen alone. The distribution of the beads and cells were highly dependent on the collagen density: at lower densities the beads and cells were more evenly distributed and penetrated deeper into the scaffold. The lower density collagen scaffolds showed remarkably deeper cellular penetration and by combining it with PCL knitting the tensile strength was enhanced. This study indicated that a 0.4% hybrid scaffold strengthened with knitting achieved the best cellular distribution.
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  • Resultat 1-10 av 17

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