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Träfflista för sökning "WFRF:(Abraham C) srt2:(2005-2009)"

Sökning: WFRF:(Abraham C) > (2005-2009)

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  • Grabenbauer, Markus, et al. (författare)
  • Correlative microscopy and electron tomography of GFP through photooxidation.
  • 2005
  • Ingår i: Nature methods. - : Springer Science and Business Media LLC. - 1548-7091 .- 1548-7105. ; 2:11, s. 857-62
  • Tidskriftsartikel (refereegranskat)abstract
    • We have developed a simple correlative photooxidation method that allows for the direct ultrastructural visualization of the green fluorescent protein (GFP) upon illumination. The method, termed GRAB for GFP recognition after bleaching, uses oxygen radicals generated during the GFP bleaching process to photooxidize 3,3'-diaminobenzidine (DAB) into an electron-dense precipitate that can be visualized by routine electron microscopy and electron tomography. The amount of DAB product produced by the GRAB method appears to be linear with the initial fluorescence, and the resulting images are of sufficient quality to reveal detailed spatial information. This is exemplified by the observed intra-Golgi stack and intracisternal distribution of a human Golgi resident glycosylation enzyme, N-acetylgalactosaminyltransferase-2 fused either to enhanced GFP or CFP.
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  • Marchesini, Stefano, et al. (författare)
  • Massively parallel X-ray holography
  • 2008
  • Ingår i: Nature Photonics. - : Springer Science and Business Media LLC. - 1749-4885 .- 1749-4893. ; 2:9, s. 560-563
  • Tidskriftsartikel (refereegranskat)abstract
    • Advances in the development of free-electron lasers offer the realistic prospect of nanoscale imaging on the timescale of atomic motions. We identify X-ray Fourier-transform holography(1,2,3) as a promising but, so far, inefficient scheme to do this. We show that a uniformly redundant array(4) placed next to the sample, multiplies the efficiency of X-ray Fourier transform holography by more than three orders of magnitude, approaching that of a perfect lens, and provides holographic images with both amplitude-and phase-contrast information. The experiments reported here demonstrate this concept by imaging a nano-fabricated object at a synchrotron source, and a bacterial cell with a soft-X-ray free-electron laser, where illumination by a single 15-fs pulse was successfully used in producing the holographic image. As X-ray lasers move to shorter wavelengths we expect to obtain higher spatial resolution ultrafast movies of transient states of matter.
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  • Resultat 1-19 av 19

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