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  1. Article

    Open Access

    On the incorporation of nickel into hexagonal barium titanate: magnetic properties and electron paramagnetic resonance (EPR)

    Systematic measurements of the magnetic moment of hexagonal 6H-BaTiO3 + 0.04 BaO + x NiO (0.005 ≤ x ≤ 0.02) ceramics were performed to study the influence of Ni ions on the magnetic properties. By temperature-dep...

    R. Böttcher, H. T. Langhammer, T. Walther, S. Kücker in Journal of Materials Science (2021)

  2. No Access

    Chapter

    Secondary Microsurgery

    Elective microsurgical procedures include reconstructive operations on vessels and nerves as well as free tissue transplants. In children, this form of therapy is mainly used for specific clinical pictures and...

    R. Böttcher in Movement Disorders of the Upper Extremities in Children (2021)

  3. No Access

    Article

    Ferromagnetic properties of barium titanate ceramics doped with cobalt, iron, and nickel

    The influence of annealing in strongly reducing atmosphere on the magnetic properties of hexagonal BaTiO3 + 0.04 BaO + x/2 Co2O3 (0.0025 ≤ x ≤ 0.10) ceramics was investigated. The samples air-sintered at 1673 K w...

    H. T. Langhammer, T. Müller, T. Walther, R. Böttcher in Journal of Materials Science (2016)

  4. Article

    Open Access

    Human phosphodiesterase 4D7 (PDE4D7) expression is increased in TMPRSS2-ERG-positive primary prostate cancer and independently adds to a reduced risk of post-surgical disease progression

    There is an acute need to uncover biomarkers that reflect the molecular pathologies, underpinning prostate cancer progression and poor patient outcome. We have previously demonstrated that in prostate cancer c...

    R Böttcher, D J P Henderson, K Dulla, D van Strijp in British Journal of Cancer (2015)

  5. No Access

    Article

    Next-generation sequencing reveals novel rare fusion events with functional implication in prostate cancer

    Gene fusions, mainly between TMPRSS2 and ERG, are frequent early genomic rearrangements in prostate cancer (PCa). In order to discover novel genomic fusion events, we applied whole-genome paired-end sequencing to...

    I Teles Alves, T Hartjes, E McClellan, S Hiltemann, R Böttcher, N Dits in Oncogene (2015)

  6. No Access

    Article

    EPR of Gd3+ ion in mixed CeO2-Y2O3 nanocrystals

    This paper reports on the results of EPR studies of mixed CeO2-Y2O3 crystals (including nanosized crystals) doped by gadolinium ions. It is revealed that the width of the line corresponding to the allowed transit...

    L. K. Aminov, I. N. Kurkin, R. M. Rakhmatullin, R. Böttcher in Physics of the Solid State (2009)

  7. No Access

    Article

    Preparation of lead titanate ultrafine powders from combined polymerisation and pyrolysis route

    Lead titanate (PbTiO3) nanopowders were prepared from a monomeric metallo-organic precursor through combined solid-state polymerisation and pyrolysis (CPP). This makes it possible to adjust the mean particle size...

    E. Erdem, R. Böttcher, H.-C. Semmelhack, H.-J. Gläsel in Journal of Materials Science (2003)

  8. No Access

    Article

    A Q-band pulsed ENDOR spectrometer for the study of transition metal ion complexes in solids

    We describe the design of a pulsed electron nuclear double resonance (ENDOR) spectrometer operating at Q-band frequencies (35 GHz) for studies of transition metal ion complexes in the temperature range between...

    J. Hoentsch, Yu. Rosentzweig, D. Heinhold, K. Köhler in Applied Magnetic Resonance (2003)

  9. No Access

    Article

    Stabilisation of divalent rare earth elements in natural fluorite

    ¶The occurrence of divalent rare earth elements (Sm2+, Yb2+, Tm2+, and Ho2+) in natural fluorite is evaluated using a suite of 37 samples deriving mainly from Sn–W deposits in the Erzgebirge (Germany), Central Ka...

    U. Kempe, M. Plötze, A. Brachmann, R. Böttcher in Mineralogy and Petrology (2002)

  10. No Access

    Article

    Analysis of correlation patterns in hyperfine sublevel correlation spectroscopy ofS=1/2,I=3/2 systems

    The properties of two-dimensional four-pulse electron spin echo envelope modulation spectra of nuclei with nuclear spinI=3/2 in disordered systems are discussed by means of calculated lithium hyperfine sublevel c...

    M. Gutjahr, R. Böttcher, A. Pöppl in Applied Magnetic Resonance (2002)

  11. No Access

    Chapter

    Local Ordering Processes in Ferroelectric, Glass-like and Modulated phases: An EPR Study

    By means of two selected examples it will be shown that electron paramagnetic resonance (EPR) spectroscopy delivers unique microscopic information about crystals with ferroelectric, glass-like and modulated ph...

    G. Völkel, N. Alsabbagh, J. Banys, H. Bauch, R. Böttcher in Advances in Solid State Physics (2002)

  12. No Access

    Article

    Preparation of barium titanate ultrafine powders from a monomeric metallo-organic precursor by combined solid-state polymerisation and pyrolysis

    A recipe has been elaborated for preparing barium titanate (BaTiO3) particles in a nucleation route which is mediated by thermal decomposition of polymeric barium titanium methacrylate. Adjustment of particle siz...

    H.-J. Gläsel, E. Hartmann, D. Hirsch, R. Böttcher, C. Klimm in Journal of Materials Science (1999)

  13. No Access

    Article

    1H ENDOR investigations on gamma-irradiated betaine calcium chloride dihydrate in the incommensurate phase

    The electron nuclear double resonance (ENDOR) technique is applied to study the influence of the incommensurate modulation on the proton hyperfine structure (hfs) tensors of the N(CH3)3 radical in betaine calcium...

    H. Metz, R. Böttcher in Applied Magnetic Resonance (1997)

  14. No Access

    Article

    Analysis of anisotropic hyperfine interaction distributions in two-dimensional four- and five-pulse electron spin echo envelope modulation spectra of protons in single crystals

    The effect of the distribution of anisotropic hyperfine interaction on the cross peak line shape of protons in single crystal two-dimensional four-pulse electron spin echo envelope modulation spectra are discu...

    A. Pöppl, R. Böttcher, G. Völkel in Applied Magnetic Resonance (1997)

  15. Article

    1H-ENDOR investigations on gamma-irradiated betaine calcium chloride dihydrate at room temperature

    H. Metz, R. Böttcher in Applied Magnetic Resonance (1996)

  16. No Access

    Article

    1H-ENDOR investigations on gamma-irradiated betaine calcium chloride dihydrate at room temperature

    The ENDOR technique is applied to study the structure of the free radical N(CH3)3, found in the high temperature phase in the incommensurate crystal BCCD after γ-irradiation. The radical possesses a planar struct...

    H. Metz, R. Böttcher in Applied Magnetic Resonance (1995)

  17. No Access

    Chapter and Conference Paper

    Structure Determination of Two Mn2+ Paramagnetic Centers in α - LiIO3 by the RFDS and ENDOR Methods

    The superhyperfine interactions of two types of Mn 2+ paramagnetic centers have been investigated with the RFDS and ENDOR methods. It was determined that Mn2+ substitutes lithiu...

    D. M. Daraselia, A. Bräuer, R. Böttcher in Magnetic Resonance and Related Phenomena (1979)