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  • 1
    Electronic Resource
    Electronic Resource
    Analytic calculation of cation distributions in ferrite spinel Mn"1"-"γFe"2" "+" "γO"4
    Amsterdam : Elsevier
    Journal of Physics and Chemistry of Solids 49 (1988), S. 761-766 
    Details
    ISSN: 0022-3697
    Keywords: Manganese ferrite ; cation distributions ; defect thermodynamics ; electrical resistivity ; magnetic ferrite ; thermoelectric power
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-3697(88)90025-X
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fast capillary-scanning system for detecting fluorescently labelled DNA sequencing fragments separated by capillary gel electrophoresis (1995)
    Springer
    Chromatographia 40 (1995), S. 345-349 
    Details
    ISSN: 1612-1112
    Keywords: Capillary gel electrophoresis ; Laser-induced fluorescence ; DNA sequencing ; Capillary-scanning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A capillary-scanning system for increasing the total throughput of DNA sequencing has been developed. The DNA sequencing method using the system features a spatial and temporal separation of laser-induced fluorescence detection from capillary gel electrophoresis. Fluorescently labelled adenine base fragments of pBluescript SK(−) were, produced in enzymatic sequencing reactions, and separated by capillary gel electrophoresis using UV-visible transparent capillaries filled with 8% T, 0% C polyacrylamide gel. The capillary containing all bands of the fragments was then scanned longitudinally with a 488 nm argon ion laser beam in 2.6 min. The adenine base sequence of the DNA was determined out to 400 bases by detecting fluorescence signals generated from the bands during the scan. The present scan speed is essentially limited by a slow strip-chart recorder and could be greatly increased by employing a fast data acquisition system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02290368
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  • 3
    Electronic Resource
    Electronic Resource
    Heavy metal-mediated activation of the rat Cu/Zn superoxide dismutase gene via a metal-responsive element (1999)
    Springer
    Molecular genetics and genomics 262 (1999), S. 310-313 
    Details
    ISSN: 1617-4623
    Keywords: Key wordsSOD1 gene ; Metal-responsive element ; Induction ; Heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Cu/Zn superoxide dismutase (SOD1) catalyzes the dismutation of superoxide radicals produced in the course of biological oxidations. When placed under the control of the rat SOD1 gene promoter and transfected into human HepG2 hepatoma cells, the activity of a chloramphenicol acetyltransferase reporter gene was found to increase three- to four-fold in the presence of heavy metals (cadmium, zinc and copper). Functional analysis of mutant derivatives of the SOD1 gene promoter and the use of a heterologous promoter system confirmed that the induction of the SOD1 gene by metal ions requires a metal-responsive element (MRE) located between positions −273 and −267 (GCGCGCA). It was also shown by gel mobility shift assays that an MRE binding protein is induced by the exposure of the human liver cell line HepG2 to heavy metals. These results suggest that the MRE participates in the induction of the SOD1 gene by heavy metals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380051088
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  • 4
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    Photonic crystals for nano-light in moire graphene superlattices (2018)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2018-12-07
    Description: Graphene is an atomically thin plasmonic medium that supports highly confined plasmon polaritons, or nano-light, with very low loss. Electronic properties of graphene can be drastically altered when it is laid upon another graphene layer, resulting in a moiré superlattice. The relative twist angle between the two layers is a key tuning parameter of the interlayer coupling in thus-obtained twisted bilayer graphene (TBG). We studied the propagation of plasmon polaritons in TBG by infrared nano-imaging. We discovered that the atomic reconstruction occurring at small twist angles transforms the TBG into a natural plasmon photonic crystal for propagating nano-light. This discovery points to a pathway for controlling nano-light by exploiting quantum properties of graphene and other atomically layered van der Waals materials, eliminating the need for arduous top-down nanofabrication.
    Keywords: Physics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Full momentum- and energy-resolved spectral function of a 2D electronic system (2017)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2017-11-17
    Description: The single-particle spectral function measures the density of electronic states in a material as a function of both momentum and energy, providing central insights into strongly correlated electron phenomena. Here we demonstrate a high-resolution method for measuring the full momentum- and energy-resolved electronic spectral function of a two-dimensional (2D) electronic system embedded in a semiconductor. The technique remains operational in the presence of large externally applied magnetic fields and functions even for electronic systems with zero electrical conductivity or with zero electron density. Using the technique on a prototypical 2D system, a GaAs quantum well, we uncover signatures of many-body effects involving electron-phonon interactions, plasmons, polarons, and a phonon analog of the vacuum Rabi splitting in atomic systems.
    Keywords: Physics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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