Search Results - (Author, Cooperation:J. Walz)
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1Latest Papers from Table of Contents or Articles in PressA. Mooser ; S. Ulmer ; K. Blaum ; K. Franke ; H. Kracke ; C. Leiteritz ; W. Quint ; C. C. Rodegheri ; C. Smorra ; J. Walz
Nature Publishing Group (NPG)
Published 2014Staff ViewPublication Date: 2014-05-30Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
2Latest Papers from Table of Contents or Articles in PressS. Ulmer ; C. Smorra ; A. Mooser ; K. Franke ; H. Nagahama ; G. Schneider ; T. Higuchi ; S. Van Gorp ; K. Blaum ; Y. Matsuda ; W. Quint ; J. Walz ; Y. Yamazaki
Nature Publishing Group (NPG)
Published 2015Staff ViewPublication Date: 2015-08-14Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
3Articles: DFG German National LicensesWalz, J. ; Greuer, A. ; Wedler, G.
Woodbury, NY : American Institute of Physics (AIP)
Published 1998Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: The intrinsic stress and morphology of the Stranski–Krastanow system Ge/Si(111) have been investigated at deposition temperatures of 700–950 K. In a broad range of intermediate temperatures, only one distinct decline of stress is observed at the onset of three-dimensional islanding. Supported by a recent transmission electron microscopy study, the results demonstrate that the strain of Ge/Si(111), where the substrate surface in contrast to Ge/Si(001) is the glide plane for dislocations, is relieved by incorporation and continuous rearrangement of dislocations during the island stage. © 1998 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesStaff View
ISSN: 0016-8890Topics: German, Dutch and Scandinavian StudiesNotes: BOOK REVIEWSURL: -
5Articles: DFG German National LicensesStaff View
ISSN: 0016-8890Topics: German, Dutch and Scandinavian StudiesURL: -
6Articles: DFG German National LicensesStaff View
ISSN: 0016-8890Topics: German, Dutch and Scandinavian StudiesURL: -
7Articles: DFG German National LicensesStaff View
ISSN: 0014-5793Keywords: Electron microscopy ; Molecular modelling ; Proteasome ; Secondary structure prediction ; Thermoplasma acidophilumSource: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyChemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesStaff View
ISSN: 0009-2614Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 1432-0630Keywords: PACS: 68.55.Jk; 68.60.Bs; 81.15.HiSource: Springer Online Journal Archives 1860-2000Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPhysicsNotes: Abstract. The 3D islands of the Stranski–Krastanow system Ge/Si(001) that form either during the annealing of previously flat and nearly strain-relieved Ge films at 1020 K or directly at the Ge deposition at 1020 K are found to be composed of a mixture of Ge and Si, thus pointing to considerable interdiffusion at 1020 K. Direct measurement of the elastic energy unambiguously reveals that neither the 3D islanding nor the Si in-diffusion are driven by the reduction of misfit strain; this strain being the result of increasing configurational entropy.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 1432-0649Keywords: PACS: 32.80.Pj; 42.50.Vk; 03.75.-bSource: Springer Online Journal Archives 1860-2000Topics: PhysicsType of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesMüller, C. A. ; Walz, J. ; Zinser, R. ; Bühring, H. J. ; Steinke, B. ; Schmidt, H.
Springer
Published 1991Staff ViewISSN: 1432-0584Keywords: HLA antigens ; Regulation in vivo ; Interferon ; Myeloproliferative syndromeSource: Springer Online Journal Archives 1860-2000Topics: MedicineNotes: Summary Eighteen patients with myeloproliferative syndrome (14 with chronic myeloid leukemia, four with essential thrombocytosis) were investigated for modulation of HLA antigens on peripheral blood lymphocytes, monocytes, and hematopoietic precursors during IFNα therapy as a sign of potentially increased immune recognition of malignant cells. After 1 month of IFNα therapy, an increased number of monocytes and hematopoietic precursor cells, but not of lymphocytes, expressed HLADQ antigens. In addition, a strong induction of HLA class-I antigens was found on both hematopoietic progenitors and normal peripheral blood mononuclear cells. With daily injections of IFN in the first month of therapy stimulation continuously increased, suggested a major effect of IFNa on hematopoietic progenitors with sustained enhanced expression of HLA class-I antigens during differentiation of myelomonocytic cells. HLA class-I antigen expression was consistently augmented by IFNα in all patients, irrespective of their hematological response.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesStaff View
ISSN: 1572-9540Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract The development of the first continuous coherent source at 121.56 nm is described. Radiation at this wavelength of Lyman α can be used for laser cooling of antihydrogen on the strong 1S–2P transition. It also opens up a possibility for precision spectroscopy that requires just a few antihydrogen atoms.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 1572-9540Keywords: antihydrogen ; combined trap ; laser stimulated recombinationSource: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract We present a combined Paul-Penning trap to study CO2 laser stimulated recombination of protons and electrons. The trap is located in the center of an optical resonator for 11 μm radiation. In this manner the available laser intensity is enhanced for stimulated recombination to the n=1 state of hydrogen.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesWalz, J. ; Ross, S. B. ; Zimmermann, C. ; Ricci, L. ; Prevedelli, M. ; Hänsch, T. W.
Springer
Published 1996Staff ViewISSN: 1572-9540Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract Experiments with electrons and ions in a combined trap are reported. The unique capability to confine particles with opposite charge and very different mass simultaneously in the same spatial region makes the combined trap a promising device for future synthesis of antihydrogen.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesStaff View
ISSN: 1572-9540Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Conclusion Recently developed high-power semiconductor laser amplifiers offer new ways to construct laser sources for high-resolution spectroscopy in the blue and ultraviolet. Such sources overcome a number of limitations that are connected to the standard single-mode ring laser systems. A source of this kind can contribute significantly to the feasibility of antihydrogen spectroscopy. Experiments with hydrogen will also benefit greatly. The construction of an optical hydrogen frequency standard becomes realistic and experiments with demanding atomic preparation techniques as, for instance, optical cooling in magnetic traps are facilitated.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 1572-9540Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract The unique capability to confine particles with opposite charge and very different mass simultaneously in the same spatial region makes the combined trap a promising device for future synthesis of antihydrogen. For recombination experiments it is desirable to detect particles in the combined trap non-destructively. A detection scheme is proposed for that purpose which is based upon the interaction between stored electrons (or positrons) and the field in the microwave trap resonator.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesStaff View
ISSN: 1618-2650Source: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyType of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesStaff View
ISSN: 1618-2650Source: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyType of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesStaff View
ISSN: 0044-2313Keywords: Chemistry ; Inorganic ChemistrySource: Wiley InterScience Backfile Collection 1832-2000Topics: Chemistry and PharmacologyDescription / Table of Contents: Esters of Stibonic Acid. II. Preparation and Properties of Esters of Methanestibonic Acid; Structure of Di-μ-methoxy-bis[dibromo-methoxy-methyl-antimony(V)]Dimeric alkoxy-bridged compounds of the type [CH3SbX2(OR)(μ-OR)]2 (X = Cl, Br; R = CH3, C2H5) are prepared by oxidation of CH3Sb(OR)2 with Br2 or SO2Cl2 in CH2Cl2 below -60°C as light sensitive crystals. The structure of [CH3SbBr2(OCH3)(μ-OCH3)]2 was determined by X-Ray analysis. By reaction with sodium alkoxides in the corresponding alcohol at 0°C dimeric tetraalkoxymethylstiboranes are obtained. Exchange reactions of tetramethoxymethylstiborane with ethanol give the ethoxy derivative and with diols symmetric spirocyclic esters of methanestibonic acid.Notes: Dimere alkoxyverbrückte Verbindungen des Typs [CH3SbX2(OR)(μ-OR)]2 (X = Cl, Br; R = CH3, C2H5) können durch Oxidation von CH3Sb(OR)2 mit Br2 oder SO2Cl2 in CH2Cl2 unterhalb -60°C als lichtempfindliche kristalline Feststoffe erhalten werden. Die Struktur der Verbindung [CH3SbBr2(OCH3)(μ-OCH3)]2 konnte mittels Röntgenstrukturanalyse bestimmt werden. Umsetzungen mit Natriumalkoholaten in den entsprechenden Alkoholen bei 0°C führen zu dimeren Tetraalkoxymethylstiboranen. Austauschreaktionen von Tetramethoxymethylstiboran mit Ethanol ergeben das Ethoxyderivat und mit Diolen symmetrische spirocyclische Methanstibonsäureester.Additional Material: 1 Ill.Type of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesStaff View
ISSN: 0044-2313Keywords: Chemistry ; Inorganic ChemistrySource: Wiley InterScience Backfile Collection 1832-2000Topics: Chemistry and PharmacologyDescription / Table of Contents: Preparation of Pentahalogeno-methyl- and -phenylantimonates(V), Trihalogenomethyl-antimonates(III), and TetrahalogenophenylstiboranesComplex Salts R4E[MeSbCl5-nBrn] can be synthesized by reaction of MeSbCl2 with R4EX (X = Cl, Br: R4E = Ph4P, Ph4Sb) and SO2Cl2 or by oxidation of the new salts R4E[MeSbBr2X] with SO2Cl2 or Br2. The Phenylderivatives R4E[PhSbCl5-nBrn] are obtained by reaction of PhSbY2 (Y = Cl, Br) with R4EX (R4E = Ph4P: X = Cl, Br; R4E = Et4N: X = Br) and SO2Cl2 or Br2. Stabilization of PhSbBr2Y2 (Y = Cl, Br) with Et4NBr also yields Et4N[PhSbBr3Y2].Notes: Die Komplexsalze R4E[MeSbCl5-nBrn] können durch Reaktion von MeSbCl2 mit R4EX (X = Cl, Br: R4E = Ph4P, Ph4Sb) und SO2Cl2 sowie durch Oxidation der neu synthetisierten Salze R4E[MeSbBr2X] mit SO2Cl2 oder Br2 hergestellt werden. Die Phenylderivate R4E[PhSbCl5-nBrn] werden ebenfalls durch Umsetzung von PhSbY2 (Y = Cl, Br) mit Salzen R4EX (R4E = Ph4P: X = Cl, Br; R4E = Et4N: X = Br) und SO2Cl2 oder Br2 erhalten. Die erstmals synthetisierten Dibromodihalogenophenylstiborane PhSbBr2Y2 (Y = Cl, Br) können mit Et4NBr stabilisiert werden.Additional Material: 2 Tab.Type of Medium: Electronic ResourceURL: