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  • Nature Publishing Group  (21)
  • Wiley-Blackwell  (18)
  • American Institute of Physics (AIP)  (5)
  • American Association for the Advancement of Science (AAAS)  (2)
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Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    Spin-wave energies in ferromagnetic nickel alloys (abstract) (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 3830-3830 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An expression is derived for the spin-wave stiffness constant D in a ferromagnetic metallic alloy. The formalism is based on a multiorbital tight-binding model and the Hartree–Fock approximation. Both diagonal and off-diagonal disorder are taken into account. Results for Ni-Fe, Ni-Co, and Ni-Cu alloys are obtained within the coherent potential approximation (CPA) and compared with previous calculations and experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340629
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  • 2
    Electronic Resource
    Electronic Resource
    A new transparent conducting oxide in the Ga2O3–In2O3–SnO2 system (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 70 (1997), S. 1706-1708 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new transparent conducting oxide (TCO), which can be expressed as Ga3−xIn5+xSn2O16; 0.2≤x≤1.6, has been identified. The equilibrium phase relationships of this new material with respect to three other TCOs in Ga2O3–In2O3–SnO2 are reported. The optical properties of this phase are slightly superior to Sn-doped indium oxide (ITO) and depend on composition. A room-temperature conductivity of 375 Ω cm−1 was obtained for H2-reduced Ga2.4In5.6Sn2O16. This value is an order of magnitude lower than commercial ITO films, but comparable to values reported for bulk, polycrystalline Sn-doped In2O3. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.118676
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  • 3
    Electronic Resource
    Electronic Resource
    The influence of Reynolds number upon the apparent permeability of spatially periodic arrays of cylinders (1990)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 2 (1990), S. 45-55 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Flow fields within spatially periodic arrays of cylinders arranged in square and hexagonal lattices are calculated, with microscale Reynolds number ranging between zero and 200, employing a finite element numerical scheme. The terminology of an "apparent permeability'' is introduced to establish a relationship existing between mean velocity and macroscopic pressure gradient characterized by a finite Reynolds number flow. In contrast with the low Reynolds number "true '' permeability, the apparent permeability is shown here to generally depend upon the direction of the applied pressure gradient, owing to nonlinearities existing within the local fluid motion. The orientation-dependent permeabilities of both square and hexagonal monodisperse arrays are observed to diminish with increasing Reynolds number. Similar behavior is also observed for a bidisperse square array, though the apparent permeability of the latter is shown less sensitive to Darcy velocity orientation at large Reynolds numbers in comparison to the corresponding monodisperse square array, for all cylinder concentrations examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.857691
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  • 4
    Electronic Resource
    Electronic Resource
    Phase determination and spatial distribution of an ion-beam mixed internal interface: Fe/Sn (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 3121-3131 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ion-beam mixing of tin on iron provides corrosion protection against high-temperature oxidation. Previous studies have been inconclusive as to the exact composition and distribution of alloys produced at the Fe/Sn interface. This study provides a detailed diagram of Fe-Sn specimens after ion-beam mixing with Ar+ at 40 keV and a dose of 5×1016 ions/cm2 . The interface was isotopically labeled with 7.5 nm of 57 Fe and 119 Sn so that dual perspective conversion electron Mössbauer spectroscopy could be performed. Analyses in this manner allowed comparison of 119 Sn conversion electron Mössbauer spectroscopy (CEMS) and 57 Fe CEMS spectra to accurately assign spectral components which could not be conclusively assigned using a single CEMS perspective. Information from Rutherford backscattering spectrometry confirmed the layered nature of specimens prior to implantation and was used for depth determination of the mixed region after implantation. X-ray photoelectron spectroscopy, secondary ion mass spectrometry, and scanning electron microscopy also provided information after implantation. Data indicate the formation of a uniform amorphous surface during implantation resulting in a heterogeneous mixture of components consisting mainly of dilute tin in iron (approximately 8-at. % Sn) and FeSnx (x≈1). About 80% of the 37.5-nm tin overlayer was removed by sputtering. The components identified are somewhat more iron rich than previous assignments and illustrate the difference in surface structures resulting from various implantation parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345389
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  • 5
    Electronic Resource
    Electronic Resource
    The nature of endothelium-derived vascular relaxant factor (1984)
    [s.l.] : Nature Publishing Group
    Nature 308 (1984), S. 645-647 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Rabbits (2.5 kg, New Zealand White) were stunned and 2 mm-wide ring segments from the descending thoracic aorta were prepared, mounted isometrically at 1.2 g resting force in a tissue bath with oxygenated (95% O2, 5% CO2) Holman's solution at 37 C, and equilibrated for 90 min. The hearts were ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/308645a0
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  • 6
    Electronic Resource
    Electronic Resource
    Toxicity of diphtheria toxin for lymphoblastoid cells is increased by conjugation to antilymphocytic globulin (1978)
    [s.l.] : Nature Publishing Group
    Nature 271 (1978), S. 752-755 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The mode of action of diphtheria toxin is thought to involve the entry into a cell of the toxic kA' chain following an interaction of its 'B' chain with receptors on the plasma membrane17-18. Once inside the cell the 4A' chain terminates protein synthesis by enzymatic inactivation of peptidyl-tRNA ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/271752a0
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  • 7
    Electronic Resource
    Electronic Resource
    Oldest recorded in situ tracheids (1976)
    [s.l.] : Nature Publishing Group
    Nature 263 (1976), S. 494-495 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Terminal globose sporangium ( x 18). Our investigations have centred on a lower Whitcliffian flora (uppermost Ludlow Series?Kopaninan ??1) from the Capel Horeb Quarry, Powys (SN 844323); the age of the plant-bearing Roman Camp Beds being based on faunal4 and microfossil evidence (personal ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/263494a0
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  • 8
    Electronic Resource
    Electronic Resource
    Light–dark Adaptation, and ‘Glow’, in Abnormal Moth Eyes without Pigment (1964)
    [s.l.] : Nature Publishing Group
    Nature 202 (1964), S. 621-622 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Recently, I was afforded a unique opportunity to observe light-dark adaptation in some abnormal moths with vivid yellow eyes which entirely lacked eye pigments. The moths were Halisidota argentata Pack. (Arctiidae), which normally fly shortly after sunset and at intervals during the night. Only ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/202621a0
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  • 9
    Electronic Resource
    Electronic Resource
    Discreteness of Charge on Clay Surfaces (1965)
    [s.l.] : Nature Publishing Group
    Nature 206 (1965), S. 168-170 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE repulsion of negative ions in dilute solution from a negatively charged surface has been considered by Schofield1 and Schofield and Talibudeen2, who, on the assumption of a smeared-out surface charge and a high charge density, derived an equation which may be written for a 1 : 1 electrolyte, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/206168a0
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  • 10
    Electronic Resource
    Electronic Resource
    Influence of Electrical Field on Pupation and Oviposition in Nepytia Phantasmaria Stkr. (Lepidoptera: Geometridae) (1961)
    [s.l.] : Nature Publishing Group
    Nature 191 (1961), S. 976-993 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IT is known that weather often can affect insect behaviour and development profoundly. Electrical factors associated with weather may be partly responsible for these biological reactions1, but very little experimental work has been done to determine if an electrical field can influence insect ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/191976a0
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