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Showing 13 to 24 of 472 entries
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Positron emission tomographic monitoring of dual phosphatidylinositol-3-kinase and mTOR inhibition in anaplastic large cell lymphoma.

OncoTargets and therapy

Graf N, Li Z, Herrmann K, Weh D, Aichler M, Slawska J, Walch A, Peschel C, Schwaiger M, Buck AK, Dechow T, Keller U.
PMID: 24920919
Onco Targets Ther. 2014 May 23;7:789-98. doi: 10.2147/OTT.S59314. eCollection 2014.

BACKGROUND: Dual phosphatidylinositol-3-kinase (PI3K)/mammalian target of rapamycin (mTOR) inhibition offers an attractive therapeutic strategy in anaplastic large cell lymphoma depending on oncogenic nucleophosmin-anaplastic lymphoma kinase (NPM-ALK) signaling. We tested the efficacy of a novel dual PI3K/mTOR inhibitor, NVP-BGT226 (BGT226),...

Fostering Formal Commutativity Knowledge with Approximate Arithmetic.

PloS one

Hansen SM, Haider H, Eichler A, Godau C, Frensch PA, Gaschler R.
PMID: 26560311
PLoS One. 2015 Nov 11;10(11):e0142551. doi: 10.1371/journal.pone.0142551. eCollection 2015.

How can we enhance the understanding of abstract mathematical principles in elementary school? Different studies found out that nonsymbolic estimation could foster subsequent exact number processing and simple arithmetic. Taking the commutativity principle as a test case, we investigated...

Enhanced efficiency of AlGaInP disk laser by in-well pumping.

Optics express

Mateo CM, Brauch U, Schwarzbäck T, Kahle H, Jetter M, Abdou Ahmed M, Michler P, Graf T.
PMID: 25836115
Opt Express. 2015 Feb 09;23(3):2472-86. doi: 10.1364/OE.23.002472.

The performance of a 665-nm GaInP disk laser operated continuous-wave at 15°C both in-well-pumped at 640 nm and barrier pumped at 532 nm is reported. The efficiency with respect to the absorbed power was enhanced by 3.5 times when...

Novel method to study neutron capture of 235U and 238U simultaneously at keV energies.

Physical review letters

Wallner A, Belgya T, Bichler M, Buczak K, Dillmann I, Käppeler F, Lederer C, Mengoni A, Quinto F, Steier P, Szentmiklosi L.
PMID: 24877933
Phys Rev Lett. 2014 May 16;112(19):192501. doi: 10.1103/PhysRevLett.112.192501. Epub 2014 May 14.

The neutron capture cross sections of the main uranium isotopes, (235)U and (238)U, were measured simultaneously for keV energies, for the first time by combining activation technique and atom counting of the reaction products using accelerator mass spectrometry. New...

Signatures of spin pairing in chaotic quantum dots.

Physical review letters

Lüscher S, Heinzel T, Ensslin K, Wegscheider W, Bichler M.
PMID: 11289869
Phys Rev Lett. 2001 Mar 05;86(10):2118-21. doi: 10.1103/PhysRevLett.86.2118.

Coulomb blockade resonances are measured in a GaAs quantum dot in which both shape deformations and interactions are small. The parametric evolution of the Coulomb blockade peaks shows a pronounced pair correlation in both position and amplitude, which is...

Experiments towards falsification of noncontextual hidden variable theories.

Physical review letters

Michler M, Weinfurter H, Zukowski M.
PMID: 10990969
Phys Rev Lett. 2000 Jun 12;84(24):5457-61. doi: 10.1103/PhysRevLett.84.5457.

We present two experiments testing the hypothesis of noncontextual hidden variables. The first one is based on observation of two-photon pseudo-Greenberger-Horne-Zeilinger correlations, with two of the originally three particles mimicked by the polarization degree of freedom and the spatial...

From quantum Hall ferromagnetism to huge longitudinal resistance at the 2/3 fractional quantum Hall state.

Physical review letters

Kraus S, Stern O, Lok JG, Dietsche W, Von Klitzing K, Bichler M, Schuh D, Wegscheider W.
PMID: 12484846
Phys Rev Lett. 2002 Dec 23;89(26):266801. doi: 10.1103/PhysRevLett.89.266801. Epub 2002 Dec 06.

We observe the transition from a spin-unpolarized to a polarized nu=2/3 fractional quantum Hall state at low currents (

Intensity dependence of photoassociation in a quantum degenerate atomic gas.

Physical review letters

Prodan ID, Pichler M, Junker M, Hulet RG, Bohn JL.
PMID: 14525225
Phys Rev Lett. 2003 Aug 22;91(8):080402. doi: 10.1103/PhysRevLett.91.080402. Epub 2003 Aug 19.

We have measured the intensity dependent rate and frequency shift of a photoassociation transition in a quantum degenerate gas of 7Li. The rate increases linearly with photoassociation laser intensity for low intensities, whereas saturation is observed at higher intensities....

Anomalous spin dephasing in (110) GaAs quantum wells: anisotropy and intersubband effects.

Physical review letters

Döhrmann S, Hägele D, Rudolph J, Bichler M, Schuh D, Oestreich M.
PMID: 15524843
Phys Rev Lett. 2004 Oct 01;93(14):147405. doi: 10.1103/PhysRevLett.93.147405. Epub 2004 Sep 29.

A strong anisotropy of electron spin decoherence is observed in GaAs/(AlGa)As quantum wells grown on a (110) oriented substrate. The spin lifetime of spins perpendicular to the growth direction is about one order of magnitude shorter compared to spins...

Adsorption and dissociation of NO on stepped Pt (533).

The Journal of chemical physics

Backus EH, Eichler A, Grecea ML, Kleyn AW, Bonn M.
PMID: 15485257
J Chem Phys. 2004 Oct 22;121(16):7946-54. doi: 10.1063/1.1799956.

We present an experimental and theoretical investigation of the adsorption, desorption, and dissociation of NO on the stepped Pt (533) surface. By combining temperature programmed desorption and reflection absorption infrared spectroscopy, information about the adsorption sites at different temperatures...

Photoassociation spectroscopy of ultracold Cs below the 6P(3/2) limit.

The Journal of chemical physics

Pichler M, Chen H, Stwalley WC.
PMID: 15473735
J Chem Phys. 2004 Oct 08;121(14):6779-84. doi: 10.1063/1.1788657.

High precision photoassociation spectroscopy is performed in ultracold cesium gas, with detunings as large as 51 cm(-1) below the Cs(6S(1/2))+Cs(6P(3/2)) asymptote. Trap-loss fluorescence detection is used for detecting the photoassociation to excited state ultracold molecules. Long vibrational progressions are...

Complex interrupted tetrahedral frameworks in the nitridosilicates M7Si6N15 (M = La, Ce, Pr).

Chemistry (Weinheim an der Bergstrasse, Germany)

Schmolke C, Oeckler O, Bichler D, Johrendt D, Schnick W.
PMID: 19655347
Chemistry. 2009 Sep 14;15(36):9215-22. doi: 10.1002/chem.200900703.

A new structure type of nitridosilicates with an interrupted framework has been identified for M(7)Si(6)N(15) with M = La, Ce, and Pr. The materials have been synthesized in a radio-frequency furnace at temperatures between 1550-1625 degrees C, starting from...

Showing 13 to 24 of 472 entries