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  • 1
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    Colloidal Titanium Nitride Nanobars for Broadband Inexpensive Plasmonics and Photochemistry from Visible to Mid-IR Wavelengths (2022)
    Details
    Publikationsdatum: 2023-03-20
    Sprache: Englisch
    Materialart: article , doc-type:article
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  • 2
    Digitale Medien
    Digitale Medien
    Enzymatic and Immunologic Identification of Succinic Semialdehyde Dehydrogenase in Rat and Human Neural and Nonneural Tissues (1995)
    Oxford, UK : Blackwell Science Ltd
    Journal of neurochemistry 65 (1995), S. 0 
    Details
    ISSN: 1471-4159
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Abstract: We have identified succinic semialdehyde dehydrogenase protein in rat and human neural and nonneural tissues. Tissue localization was determined by enzymatic assay and by western immunoblotting using polyclonal antibodies raised in rabbit against the purified rat brain protein. Although brain shows the highest level of succinic semialdehyde dehydrogenase activity, substantial amounts of enzyme activity occur in mammalian liver, pituitary, heart, and ovary. We further demonstrate the absence of succinic semialdehyde dehydrogenase enzyme activity and protein in brain, liver, and kidney tissue samples from an individual affected with succinic semialdehyde dehydrogenase deficiency, thereby verifying the specificity of our antibodies.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1471-4159.1995.65020851.x
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  • 3
    Digitale Medien
    Digitale Medien
    Distribution of the satellite reflections of the modulation and its thermal stability in single-crystal Bi2Sr2CaCu2Oy (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 2924-2928 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The satellite distribution around the main reflections of the incommensurate modulation in Bi2Sr2CaCu2Oy has been studied by means of x-ray diffraction on a number of single crystals. The presence of the forbidden reflections which are incompatible with a B-centered Bravais lattice is found to be correlated with the spread of the mosaic blocks in the crystal sheet and therefore spurious to the distribution of the satellite reflections in the reciprocal space. Diffraction data collected for a highly oriented crystal annealed in flowing nitrogen at 650 °C for 60 h have shown that the structural modulation is coherent with the Bi2Sr2CaCu2Oy phase and robust to the anneal. Relationships between superconductivity, structural modulation, and oxygen content in the compound are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.357531
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  • 4
    Digitale Medien
    Digitale Medien
    High-resolution infrared spectroscopy of isotopic impurity Q1(0) transitions in solid parahydrogen (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 105 (1996), S. 4461-4481 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: We have made a high-resolution infrared spectroscopic study of the Q1(0) (v=1←0, J=0←0) vibrational transitions of the isotopic impurities D2 and HD in solid parahydrogen. Each impurity has a spectrum composed of ∼100 sharp lines spread over ∼0.4 cm−1. The linewidths vary, but are on the order of 10 MHz. These spectra make clear: (1) the infrared Q1(0) transitions of J=0 isotopic impurities are induced by the quadrupolar fields of nearby impurity J=1 molecules; and (2) the spectral pattern of strong Q1(0) lines is due to the splitting of the M-orientational levels of J=1/J=0 o-D2 or J=1/J=0 HD nearest-neighbor (nn) impurity pairs. With the aid of several theoretical works, the strong lines in the D2 and HD spectra can be individually and unambiguously assigned as specific quantum state Q1(0) transitions of nn impurity pairs containing p-D2/o-D2 or o-H2/o-D2, and o-H2/HD, respectively. The assigned transitions of nn impurity pairs containing o-H2 are confirmed by combination differences which agree to within 5×10−4 cm−1, the instrumental precision. These assignments yield complete Q1(0) energy level diagrams for the nn impurity pairs o-H2/o-D2 and o-H2/HD embedded in solid parahydrogen. The experimental energy level splittings are fit to a two parameter model which describes anisotropic interactions in the parahydrogen crystal. These experimental parameters appear to have significant contributions from the changes in renormalization and lattice constant around the heavier isotopic impurity. We have also assigned a few of the weaker spectral features as Q1(0) transitions of more distant impurity pairs, but the bulk of these transitions are yet to be assigned. They do form a distinctive pattern and are thought to be the Q1(0) transitions of impurity triples and larger clusters. This study is one of the few cases for which high-resolution laser spectroscopy has been successfully applied to the condensed phase and for which many of the transitions have rigorous quantum state assignments. © 1996 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.472298
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  • 5
    Digitale Medien
    Digitale Medien
    Topology of beef heart cytochrome c oxidase from studies on reconstituted membranes (1984)
    s.l. : American Chemical Society
    Biochemistry 23 (1984), S. 5616-5621 
    Details
    ISSN: 1520-4995
    Quelle: ACS Legacy Archives
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/bi00318a036
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  • 6
    Digitale Medien
    Digitale Medien
    Labeling of the ATP synthase of Escherichia coli from the head-group region of the lipid bilayer (1987)
    s.l. : American Chemical Society
    Biochemistry 26 (1987), S. 7107-7113 
    Details
    ISSN: 1520-4995
    Quelle: ACS Legacy Archives
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/bi00396a036
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  • 7
    Digitale Medien
    Digitale Medien
    The nature of a 2050–2150-cm−1 infrared band in neutron-transmutation-doped silicon grown by the floating-zone method in a hydrogen atmosphere (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 5606-5608 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A strong, wide infrared absorption band in 2050–2150-cm−1 range has been found in neutron-transmutation-doped silicon grown by the floating-zone method in a hydrogen atmosphere and annealed at 650 °C. This band is due to the stretching vibration of the Si–H bond, formed as hydrogen atoms diffuse, aggregate, and saturate silicon dangling bonds in the neutron-irradiation disordered region. This absorption band is similar to that of hydrogenated amorphous silicon in the 1900–2150-cm−1 range except that its vibration frequency is somewhat higher. The disordered region defect and its amorphous-siliconlike property could be observed because of the incorporation of hydrogen. The hydrogen concentration of the floating-zone melted silicon grown in a hydrogen atmosphere used in this study is estimated to be (1–2)×1017 cm−3 on the basis of the strength of this wide infrared absorption band. A possible reason for this vibration frequency shift is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.340342
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  • 8
    Digitale Medien
    Digitale Medien
    Theoretical issues for critical currents of bulk polycrystalline YBa2Cu3O7−δ superconductors (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 1886-1888 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The influence of grain orientation and weak-link coupling between grains on the critical current of polycrystalline Y-Ba-Cu-O superconductors has been investigated by numerical methods. The theoretical results indicate that there is size effect on jC in bulk polycrystals, and that it is not necessary to consider the influence of grain orientation when jC is less than 105 A/cm2.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.344346
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  • 9
    Digitale Medien
    Digitale Medien
    Inelastic two-composite-particle system scattering theory at high energy (1989)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 30 (1989), S. 1365-1372 
    Details
    ISSN: 1089-7658
    Quelle: AIP Digital Archive
    Thema: Mathematik , Physik
    Notizen: In this paper, the methods of nucleons outside the closed shell (NOCS) and nucleons inside the closed shell (NICS) is introduced into the composite-particle systems, and Glauber's multiple scattering theory is used to divide the multiple scattering amplitude (between two composite particle systems) into NOCS–NOCS, NOCS–NICS, NICS–NOCS, and NICS–NICS scattering amplitudes. In order to apply these concepts to our research, an effective approximate method is used for each scattering amplitude. For example, an independent particle model approximation has been used for the NOCS–NOCS scattering amplitude. As for the NICS–NICS and NICS–NOCS scattering amplitudes, the geometrical model and Bohr's collective model are adopted, respectively. It can be shown that the high-energy scattering S matrix elements for composite-particle systems present a clear physical picture and render convenience to calculation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.528318
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  • 10
    Digitale Medien
    Digitale Medien
    Superconductivity of Sb-doped BiPbSrCaCuO compounds (abstract) (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5083-5083 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Extensive studies on Pb-doped Bi-Ca-Cu-O superconductors have seldom produced a single-phase Bi-based superconductor from a magnetic point of view without the 80-K phase in it, even though zero-resistance has been commonly observed around and above 100 K. This is mainly because of the additional intergranular phases controlled by calcium and copper diffusion which appears to be extremely sensitive to even minute traces of impurities. Hence, recent reports on the observation of superconductivity above 130 K in Sb-doped Bi-based alloys is of interest. We have prepared a number of Bi-based superconducting compounds containing Pb and/or Sb using the computerized coprecipitation method (which gives powders of submicrometer size particles) as well as a solid-state diffusion technique. The role of excess Ca on the superconducting properties have also been studied. Effects of various short- and long-term heat treatment conditions have also been investigated. The final pelletized samples have been characterized by x-ray, electrical, and magnetic property measurements. In most cases, Tc (R=0) of a sample can be easily enhanced to 105–110 K by modifying the annealing conditions. However, we have not yet been able to verify the claims of Tc(R=0) over 130 K although a small portion with Tc(onset) over 130 K does appear sometimes. Samples without Sb have to be annealed in air over 60 h to reach high Tc(R=0) than 100 K while those with Sb substitution need a maximum of 24 h to achieve the higher Tc. ac susceptibility studies over four decades of field amplitudes (3 mOe–30 Oe) show, below the diamagnetic onset temperature at 110 K, a knee around 100 K, which is perhaps due to intergranular low-field penetration. In any case in these samples it is possible to completely suppress the 80-K phase. From dc magnetic data we find that in these Sb-doped samples Jc(transport) can be varied from 350 to 1500 A/cm2 at 4.2 K, and is weakly field dependent as compared to those without Sb-doping. Systematic studies will be presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.344680
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