410 research outputs found
Bedeutung molekularpathologischer Methoden in der Onkologie: Pathologie und onkologische Entscheidungsprozesse
Zusammenfassung: Die Anzahl von molekularen Untersuchungen in der Histo- und Zytopathologie hat in den letzten Jahren, insbesondere mit zunehmender Bedeutung der sog. personalisierten Medizin bei Krebspatienten, stark zugenommen. Die Ergebnisse dieser Untersuchungen flieĂen vermehrt in die Pathologieberichte ein, die den behandelnden Ărzten als Grundlage fĂŒr weitere Therapieentscheidungen dienen. Die wichtigsten molekularen Methoden, die derzeit in der Pathologie eingesetzt werden, werden mit ihren Möglichkeiten und Grenzen vorgestell
Bedeutung molekularpathologischer Methoden in der Onkologie: Pathologie und onkologische Entscheidungsprozesse
Zusammenfassung: Die Anzahl von molekularen Untersuchungen in der Histo- und Zytopathologie hat in den letzten Jahren, insbesondere mit zunehmender Bedeutung der sog. personalisierten Medizin bei Krebspatienten, stark zugenommen. Die Ergebnisse dieser Untersuchungen flieĂen vermehrt in die Pathologieberichte ein, die den behandelnden Ărzten als Grundlage fĂŒr weitere Therapieentscheidungen dienen. Die wichtigsten molekularen Methoden, die derzeit in der Pathologie eingesetzt werden, werden mit ihren Möglichkeiten und Grenzen vorgestell
The PSI np data and their effect on the charge coupling constant
Differential cross sections of elastic neutron-proton scattering have been measured for the energy range from 200 MeV to 580 MeV. The angular interval for the detection of the recoiling proton ranges up to 48 degree in the laboratory system. This corresponds to an interval of the scattering angle from 80 degree to 180 degree in the centre-of-mass system. For absolute normalization the simultaneously measured np --> d Pi^o reaction was used above 280 MeV. The charged Pi-NN coupling constant has been determined to f^2_{Pi-n-p} = 0.076+-0.001
Macroscopic phase segregation in superconducting K0.73Fe1.67Se2 as seen by muon spin rotation and infrared spectroscopy
Using muon spin rotation (\muSR) and infrared spectroscopy we investigated
the recently discovered superconductor K0.73Fe1.67Se2 with Tc = 32 K. We show
that the combined data can be consistently described in terms of a
macroscopically phase segregated state with a matrix of ~88% volume fraction
that is insulating and strongly magnetic and inclusions with a ~12% volume
fraction which are metallic, superconducting and non-magnetic. The electronic
properties of the latter, in terms of the normal state plasma frequency and the
superconducting condensate density, appear to be similar as in other iron
selenide or arsenide superconductors.Comment: 22 pages, 8 figures. (citation list correction.
Macroscopic phase segregation in superconducting K<sub>0.73</sub>Fe<sub>1.67</sub>Seâ as seen by muon spin rotation and infrared spectroscopy
Using muon spin rotation and infrared spectroscopy, we investigated the recently discovered superconductor K0.73Fe1.67Seâ with Tcâ32 K. We show that the combined data can be consistently described in terms of a macroscopically phase-segregated state with a matrix of âŒ88% volume fraction that is insulating and strongly magnetic and inclusions with an âŒ12% volume fraction, which are metallic, superconducting, and nonmagnetic. The electronic properties of the latter, in terms of the normal state plasma frequency and the superconducting condensate density, appear to be similar as in other iron selenide or arsenide superconductors
Digital image analysis and artificial intelligence in pathology diagnostics-the Swiss view
Digital pathology (DP) is increasingly entering routine clinical pathology diagnostics. As digitization of the routine caseload advances, implementation of digital image analysis algorithms and artificial intelligence tools becomes not only attainable, but also desirable in daily sign out. The Swiss Digital Pathology Consortium (SDiPath) has initiated a Delphi process to generate best-practice recommendations for various phases of the process of digitization in pathology for the local Swiss environment, encompassing the following four topics: i) scanners, quality assurance, and validation of scans; ii) integration of scanners and systems into the pathology laboratory information system; iii) the digital workflow; and iv) digital image analysis (DIA)/artificial intelligence (AI). The current article focuses on the DIA-/AI-related recommendations generated and agreed upon by the working group and further verified by the Delphi process among the members of SDiPath. Importantly, they include the view and the currently perceived needs of practicing pathologists from multiple academic and cantonal hospitals as well as private practices
Muon spin rotation study of magnetism and superconductivity in BaFe2-xCoxAs2 and Pr1-xSrxFeAsO
We present a muon spin rotation (\muSR) study of the magnetic and
superconducting properties of single crystals of electron-doped BaFe2-xCoxAs2
with x=0.08, 0.20, and 0.25 (Tc=9, 25 and 20K) and of polycrystalline
hole-doped Pr1-xSrxFeAsO with x=0 and 0.2 (Tc=15 K). In the former series we
observe some interesting parallels with the electron doped SmFeAsO1-xFx
1111-type system [A.J. Drew et al., to appear in Nature Materials 2009 and
arXiv:0807.4876]. In particular, we obtain evidence that strongly disordered
static magnetism coexists with superconductivity on a microscopic scale in
underdoped samples and even at optimum doping there is a slowing down (or
enhancement) of dynamic magnetic correlations below Tc\approx25K. To the
contrary, for the hole-doped Pr1-xSrxFeAsO samples we obtain evidence for a
mesoscopic phase segregation into regions with nearly unperturbed AF order and
others that are non magnetic and most likely superconducting. The observed
trend resembles the one that was previously reported for hole-doped
Ba1-xKxFe2As2 [A.A. Aczel et al., Phys. Rev. B 78, 214503 (2008); J.T. Park et
al., arXiv:0811.2224] and thus seems to be fairly common in these hole doped
systems.Comment: 17 pages, 6 figure
Ultra-deep sequencing confirms immunohistochemistry as a highly sensitive and specific method for detecting BRAF (V600E) mutations in colorectal carcinoma
The activating BRAF (V600) mutation is a well-established negative prognostic biomarker in metastatic colorectal carcinoma (CRC). A recently developed monoclonal mouse antibody (clone VE1) has been shown to detect reliably BRAF (V600E) mutated protein by immunohistochemistry (IHC). In this study, we aimed to compare the detection of BRAF (V600E) mutations by IHC, Sanger sequencing (SaS), and ultra-deep sequencing (UDS) in CRC. VE1-IHC was established in a cohort of 68 KRAS wild-type CRCs. The VE1-IHC was only positive in the three patients with a known BRAF (V600E) mutation as assessed by SaS and UDS. The test cohort consisted of 265 non-selected, consecutive CRC samples. Thirty-nine out of 265 cases (14.7Â %) were positive by VE1-IHC. SaS of 20 randomly selected IHC negative tumors showed BRAF wild-type (20/20). Twenty-four IHC-positive cases were confirmed by SaS (24/39; 61.5Â %) and 15 IHC-positive cases (15/39; 38.5Â %) showed a BRAF wild-type by SaS. UDS detected a BRAF (V600E) mutation in 13 of these 15 discordant cases. In one tumor, the mutation frequency was below our threshold for UDS positivity, while in another case, UDS could not be performed due to low DNA amount. Statistical analysis showed sensitivities of 100Â % and 63Â % and specificities of 95 and 100Â % for VE1-IHC and SaS, respectively, compared to combined results of SaS and UDS. Our data suggests that there is high concordance between UDS and IHC using the anti-BRAF(V600E) (VE1) antibody. Thus, VE1 immunohistochemistry is a highly sensitive and specific method in detecting BRAF (V600E) mutations in colorectal carcinoma
Study of the reaction pbar p -> phi phi from 1.1 to 2.0 GeV/c
A study has been performed of the reaction pbar p -> 4K using in-flight
antiprotons from 1.1 to 2.0 GeV/c incident momentum interacting with a hydrogen
jet target. The reaction is dominated by the production of a pair of phi
mesons. The pbar p -> phi phi cross section rises sharply above threshold and
then falls continuously as a function of increasing antiproton momentum. The
overall magnitude of the cross section exceeds expectations from a simple
application of the OZI rule by two orders of magnitude. In a fine scan around
the xi/f_J(2230) resonance, no structure is observed. A limit is set for the
double branching ratio B(xi -> pbar p) * B(xi -> phi phi) < 6e-5 for a spin 2
resonance of M = 2.235 GeV and Width = 15 MeV.Comment: 13 pages, 13 figures, 2 tables, Latex. To be published in Phys. Rev.
- âŠ