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Träfflista för sökning "WFRF:(Larsson Mikael) srt2:(2000-2004)"

Sökning: WFRF:(Larsson Mikael) > (2000-2004)

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  • Lundmark, Martin, et al. (författare)
  • The use of protective earth as a distributor of fields and radiation
  • 2000
  • Ingår i: Biological effects of EMFs. - Heraklio : Workshop on Biological Effects of Electromagnetic Fields. - 9608673305
  • Konferensbidrag (refereegranskat)abstract
    • Apart from being a safety arrangement, the protective earth, PE, is also defined as an equipotential plane which serves as a reference voltage for a circuit. Interest in the PE for EMC reasons is focused on an equipotential point. Still, most PE installation on site is carried out as a safety arrangement. In order to fulfill EMC standards regarding low emission, equipment is shielded and the shield is connected to the PE wire.The purpose of this paper is to show that electrical equipment distributes its electrical fields using the PE wire. Measurements have been taken on light fittings.
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  • Björk, Mikael, et al. (författare)
  • Few-electron quantum dots in nanowires
  • 2004
  • Ingår i: Nano Letters. - : American Chemical Society (ACS). - 1530-6992 .- 1530-6984. ; 4:9, s. 1621-1625
  • Tidskriftsartikel (refereegranskat)abstract
    • We demonstrate transport spectroscopy on bottom-up grown few-electron quantum dots in semiconductor nanowires. The dots are defined by InP double barrier heterostructures in InAs nanowires catalytically grown from nanoparticles. By changing the dot size, we can design devices ranging from single-electron transistors to few-electron quantum dots. In the latter case, electrons can be added one by one to the dots from 0 to similar to50 electrons while maintaining an almost constant charging energy, with addition spectra of the devices displaying shell structures as a result of spin and orbital degeneracies. The reduced dimensionality of the nanowire emitter gives rise to pronounced resonant tunneling peaks, where a gate can be used to control the peak positions.
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  • Fagman, Henrik, 1975, et al. (författare)
  • Nuclear accumulation of full-length and truncated adenomatous polyposis coli protein in tumor cells depends on proliferation.
  • 2003
  • Ingår i: Oncogene. - : Springer Science and Business Media LLC. - 0950-9232 .- 1476-5594. ; 22:38, s. 6013-22
  • Tidskriftsartikel (refereegranskat)abstract
    • The adenomatous polyposis coli (APC) tumor suppressor is a nucleocytoplasmic protein. The nuclear accumulation of APC was recently found to vary depending on cell density, suggesting that putative APC function(s) in the nucleus is controlled by the establishment of cell contacts. We report here that the density-dependent redistribution of APC between nucleus and cytoplasm prevails in 6/6 thyroid and colorectal carcinoma cell lines. Moreover, mutated APC lacking known nuclear localization sequences had the similar distribution pattern as the full-length protein. APC invariably accumulated in the nuclei of Ki-67 expressing cells, but was largely cytoplasmic when cell cycle exit was induced by serum starvation or at high cell density. APC colocalized with beta-catenin in the nucleus only in one cell line (SW480). Also, APC maintained a predominantly nuclear position in early confluent states when cytoplasmic beta-catenin was recruited to newly formed adherens-like junctions. The results indicate that nuclear targeting of APC is driven by cell cycle entry rather than altered cell-cell contact. The ability of C-terminally truncated APC to accumulate in the nucleus suggests that nuclear import signals other than NLS1(APC) and NLS2(APC) are functionally important. Residual function(s) of N-terminal APC fragments in tumor cells carrying APC mutations might be beneficial to tumor growth and survival.
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