118 results match your criteria: "Karlsruhe Institute of Technology: Karlsruher Institut fur Technologie[Affiliation]"

We report the first observation of the decays B^{0}→pΛ[over ¯]D^{(*)-}. The data sample of 711  fb^{-1} used in this analysis corresponds to 772×10^{6} BB[over ¯] pairs, collected at the ϒ(4S) resonance by the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We observe 19.

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Transport in Nanoporous Materials Including MOFs: The Applicability of Fick's Laws.

Angew Chem Int Ed Engl

November 2015

Department of Interface Physics, University of Leipzig, Linnéstrasse 5, 04103 Leipzig (Germany).

Diffusion in nanoporous host-guest systems is often considered to be too complicated to comply with such "simple" relationships as Fick's first and second law of diffusion. However, it is shown herein that the microscopic techniques of diffusion measurement, notably the pulsed field gradient (PFG) technique of NMR spectroscopy and microimaging by interference microscopy (IFM) and IR microscopy (IRM), provide direct experimental evidence of the applicability of Fick's laws to such systems. This remains true in many situations, even when the detailed mechanism is complex.

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We report a measurement of the time-dependent CP asymmetry of B[over ¯]^{0}→D_{CP}^{(*)}h^{0} decays, where the light neutral hadron h^{0} is a π^{0}, η, or ω meson, and the neutral D meson is reconstructed in the CP eigenstates K^{+}K^{-}, K_{S}^{0}π^{0}, or K_{S}^{0}ω. The measurement is performed combining the final data samples collected at the ϒ(4S) resonance by the BABAR and Belle experiments at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471±3)×10^{6} BB[over ¯] pairs recorded by the BABAR detector and (772±11)×10^{6} BB[over ¯] pairs recorded by the Belle detector.

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Single-Electron Detection and Spectroscopy via Relativistic Cyclotron Radiation.

Phys Rev Lett

April 2015

Center for Experimental Nuclear Physics and Astrophysics, and Department of Physics, University of Washington, Seattle, Washington 98195, USA.

It has been understood since 1897 that accelerating charges must emit electromagnetic radiation. Although first derived in 1904, cyclotron radiation from a single electron orbiting in a magnetic field has never been observed directly. We demonstrate single-electron detection in a novel radio-frequency spectrometer.

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We report the measurement of the direct CP asymmetry in the radiative B¯→X(s+dγ) decay using a data sample of (772 ± 11)×10(6) BB[over ¯] pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The CP asymmetry is measured as a function of the photon energy threshold. For Eγ*≥2.

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[BMIm]2[{PbMn(CO)5)}6I8] (BMIm: 1-butyl-3-methylimidazolium) is obtained by ionic liquid mediated reaction of PbI2 and Mn2(CO)10. Central is a cubelike (Pb6I8) unit containing a nonfilled Pb6 octahedron. Each Pb of this (Pb6I8) unit is terminated on its outside by Mn(CO)5, exhibiting Pb-Mn metal-to-metal bonding (280 pm).

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Background: The high resolution of corneal confocal microscopy (CCM) allows in vivo imaging of the corneal sub-basal nerve plexus (SNP). The field of view of a single CCM image (0.16 mm²) is not sufficient for the reliable morphometric characterisation of the SNP.

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The synthesis and characterization of soluble azaiptycenes is reported. Optical and physical properties were studied and compared with those of the structurally consanguine azaacenes. Electrochemical experiments and quantum-chemical calculations revealed the electronic structure of the iptycene derivatives.

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Phylogenomics resolves the timing and pattern of insect evolution.

Science

November 2014

China National GeneBank, BGI-Shenzhen, China. BGI-Shenzhen, China.

Insects are the most speciose group of animals, but the phylogenetic relationships of many major lineages remain unresolved. We inferred the phylogeny of insects from 1478 protein-coding genes. Phylogenomic analyses of nucleotide and amino acid sequences, with site-specific nucleotide or domain-specific amino acid substitution models, produced statistically robust and congruent results resolving previously controversial phylogenetic relations hips.

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We present the first model-independent measurement of the absolute branching fraction of the Λ(c)(+) → pK(-)π(+) decay using a data sample of 978 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The number of Λ(c)(+) baryons is determined by reconstructing the recoiling D((*)-) pπ(+) system in events of the type e(+)e(-) → D((*)-) pπ(+)Λ(c)(+). The branching fraction is measured to be B(Λ(c)(+) → pK(-)π(+)) = (6.

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Observation of D0-D0 mixing in e+e- collisions.

Phys Rev Lett

March 2014

Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.

We observe D(0)-D(0) mixing in the decay D(0) → K+π- using a data sample of integrated luminosity 976 fb(-1) collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. We measure the mixing parameters x'(2) = (0.09 ± 0.

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Measurement of the τ-lepton lifetime at Belle.

Phys Rev Lett

January 2014

Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.

The lifetime of the τ lepton is measured using the process e+ e- → τ+ τ- , where both τ leptons decay to 3πν(τ). The result for the mean lifetime, based on 711  fb(-1) of data collected with the Belle detector at the ϒ(4S) resonance and 60  MeV below, is τ=(290.17±0.

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Mass spectrometric identification of 13C-labeled metabolites during anaerobic propanoic acid oxidation.

Chem Biodivers

February 2012

Institut für Ingenieurbiologie und Biotechnologie des Abwassers, Karlsruher Institut für Technologie, Am Fasanengarten, D-76131 Karlsruhe.

Biowaste digestion is a possibility to gain biogas as a renewable fuel source. However, the anaerobic food chain may be disrupted by, e.g.

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Allergen arrays for antibody screening and immune cell activation profiling generated by parallel lipid dip-pen nanolithography.

Small

February 2012

Karlsruher Institut für Technologie (KIT), Institut für Nanotechnologie (INT), Karlsruhe Nano Micro Facility (KNMF), 76021 Karlsruhe Germany.

Multiple-allergen testing for high throughput and high sensitivity requires the development of miniaturized immunoassays that allow for a large test area and require only a small volume of the test analyte, which is often available only in limited amounts. Developing such miniaturized biochips containing arrays of test allergens needs application of a technique able to deposit molecules at high resolution and speed while preserving its functionality. Lipid dip-pen nanolithography (L-DPN) is an ideal technique to create such biologically active surfaces, and it has already been successfully applied for the direct, nanoscale deposition of functional proteins, as well as for the fabrication of biochemical templates for selective adsorption.

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Measurement of mass transfer during dip-pen nanolithography with phospholipids.

Small

July 2011

Karlsruhe Nano Micro Facility, Karlsruher Institut für Technologie, 76344 Karlsruhe, Germany.

Dip-pen nanolithography (DPN) has been extensively used before for patterning surfaces; however a complete understanding of the ink transport mechanisms is still lacking. Moreover, quality control of the fabricated structures is a bottleneck in DPN fabrication, and one aspect of this is the quantification of the ink mass transfer to the substrate during the lithographic process. There is a demand for measuring the exact amount of molecules deposited on a surface by lithographic methods, especially for biological applications.

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Electronic Excitations of Simple Cyanine Dyes: Reconciling Density Functional and Wave Function Methods.

J Chem Theory Comput

February 2011

Institut für Physikalische Chemie, Karlsruher Institut für Technologie, Kaiserstraβe 12, 76131 Karlsruhe, Germany, and Faculty of Science and Technology and MESA+ Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.

The simplest cyanine dye series [H2N(CH)nNH2](+) with n = 1, 3, 5, 7, and 9 appears to be a challenge for all theoretical excited-state methods since the experimental spectra are difficult to predict and the observed deviations cannot be easily explained with standard arguments. We compute here the lowest vertical excitation energies of these dyes using a variety of approaches, namely, complete active space second-order perturbation theory (CASPT2), quantum Monte Carlo methods (QMC), coupled cluster linear response up to third approximate order (CC3), and various flavors of time-dependent density functional theory (TDDFT), including the recently proposed perturbative correction scheme (B2PLYP). In our calculations, all parameters such as basis set, active space, and geometry dependence are carefully analyzed.

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[Modern technology in cardiovascular medicine].

Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz

August 2010

Institut für Biomedizinische Technik, Karlsruher Institut für Technologie, Karlsruhe, Deutschland.

Despite basic physiologic principles being well known for more than 300 years, the diagnosis and therapy of cardiovascular diseases are still in their early beginnings. For example, 100 years ago sudden cardiac arrest was regarded as the result of toxic gases. The diagnosis of ventricular fibrillation or treatment with a defibrillator are very recent developments.

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Nanoporous Au-Pt alloys as large strain electrochemical actuators.

Nano Lett

January 2010

Karlsruher Institut fur Technologie, Institut fur Nanotechnologie, Karlsruhe, Germany.

Nanoporous Au-Pt alloys with pore- and ligament size down to few nanometers were fabricated by dealloying Ag-Au-Pt. Owing to the small structure size and large specific surface area, the surface stress and its variation give rise to significant stress and strain in the bulk of these materials. In fact, dilatometry experiments find electrochemical actuation with large reversible strain amplitude.

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