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  • 1
    Electronic Resource
    Electronic Resource
    Partitioning behavior of Al in a nanocrystalline FeZrBAl soft magnetic alloy (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 439-442 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Atom probe field ion microscopy was employed to investigate the distribution of Al in a nanocrystalline Fe88Zr7B3Al2 soft magnet with optimal magnetic performance. The atom probe concentration depth profiles show that the Al atoms preferentially partition into the residual amorphous phase, and the partitioning factor of Al is approximately five times larger in the amorphous phase than in the bcc Fe phase. Based on the experimental results, the beneficial effect of the addition of Al on the soft magnetic properties is attributed to the change of the inherent magnetostriction constant of the residual amorphous phase induced by Al partitioning. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371881
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  • 2
    Electronic Resource
    Electronic Resource
    On the thermodynamic solution of the Boltzmann equation and nonlinear irreversible thermodynamics (1989)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 30 (1989), S. 1329-1337 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: Based on the results of a previous paper on the thermodynamic solution of the Boltzmann equation, some important questions in nonlinear irreversible thermodynamics are reexamined; specifically, the Gibbs relations, the Onsager relations, and the relationship between thermodynamic stability in terms of the entropy balance equation and the dynamical stability of the hydrodynamic equations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.528313
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  • 3
    Electronic Resource
    Electronic Resource
    Distribution of Nb and Co in an α-Fe/Nd2Fe14B-type nanocomposite (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 6928-6930 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Atom probe field ion microscopy was employed to investigate the distribution of the alloying elements in a nanocrystalline Fe76.5Nd8Co8B6Nb1.5 (at. %) alloy consisting of soft magnetic α-Fe and hard magnetic Nd2Fe14B. It was found that Co atoms prefer to partition into Nd2Fe14B phase. The partitioning factor of Co in the hard magnetic phase is approximately 2 with respect to the soft magnetic phase, α-Fe. Atom probe concentration and integrated depth profiles showed that the Nb atoms segregate at the interfaces between the soft and the hard magnetic phases. Based on the atom probe results, the beneficial effects of Nb and Co on the microstructure and the hard magnetic properties of the nanocomposite are discussed. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1317235
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  • 4
    Electronic Resource
    Electronic Resource
    An efficient gene transduction system for studying gene function in primary human dermal fibroblasts and epidermal keratinocytes (2003)
    Oxford, UK : Blackwell Science Ltd
    Clinical and experimental dermatology 28 (2003), S. 0 
    Details
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary One of the critical challenges for cellular genetic studies in primary human skin cells is lack of a gene delivery system that provides efficient transduction and sustained expression of the transgenes. Due to the limited time of survival in culture, the processes of drug selection and clonal expansion for establishing gene stably expressing cell lines are not a realistic option for primary skin cells. We have examined various gene transduction techniques in primary dermal fibroblasts and epidermal keratinocytes of human skin. We report here that vectors based on the human immunodeficiency virus (HIV, lentivirus) offer more than 90% gene transduction efficiency and sustained expression of transgenes in both human skin cell types. In contrast, most of the commonly used techniques have at best 30% transduction efficiency in these cells. Using two previously reported migration control genes, protein kinase Cδ and p38α-MAPK, as examples, we provide evidence that the unprecedented efficiency of the lentiviral system enables a clear detection of the genes' dominant negative effects, which are otherwise greatly compromised by ordinary transfection techniques. We believe that a wide application of this gene transduction system will greatly benefit studies of gene function in human skin cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2230.2003.01191.x
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  • 5
    Electronic Resource
    Electronic Resource
    Valence isomerization of quadricyclane catalyzed by bis(.mu.-acetato)-bis(norbornadiene)dirhodium: evidence for a rhodocyclobutane intermediate (1979)
    s.l. : American Chemical Society
    Inorganic chemistry 18 (1979), S. 1864-1869 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50197a030
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  • 6
    Electronic Resource
    Electronic Resource
    Comment on "Constant-current-density model for the anomalous Hall effects in Hg0.8Cd0.2Te'' [Appl. Phys. Lett. 53, 307 (1988)] (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 1480-1480 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101329
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  • 7
    Electronic Resource
    Electronic Resource
    Inverted surface effect of p-type HgCdTe (1987)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 1836-1838 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By surface passivation using anodic sulfidization, we demonstrated that the inverted surface effect which gives rise to negative Hall coefficients commonly measured in p-type HgCdTe at low temperatures can be eliminated. Our results of Hall measurements as a function of magnetic field at 77 K and computer simulations allow us to distinguish two different existing models (with shunting or nonshunting n-type inversion layer) of the inverted surface effect. Bulk and surface transport parameters such as hole concentration, hole mobility, surface electron concentration, and surface electron mobility have been derived from computer best fits of experimental Hall coefficient curves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.98486
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  • 8
    Electronic Resource
    Electronic Resource
    Magnetic and atomic short-range order in Ni-Mn base amorphous alloys (invited) (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 3219-3224 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic and compositional short-range correlations in amorphous (MnxNi1−x)75P16B6Al3 (x=0, 0.2, 0.3, and 0.4) were studied by neutron scattering. The spatial magnetic correlation in the alloy with x=0.4 was determined by spin polarized scattering, and it was shown that Mn spins are coupled either antiferromagnetically or ferromagnetically depending upon the separation. The composition dependence of the atomic pair distribution functions obtained by pulsed neutron scattering indicated that there is a strong compositional short-range ordering between Mn and Ni atoms, and that Mn atoms are separated from each other by more than a contact distance. We also present the first clear observation of the annealing effect on the compositional short-range order, in the alloy with x=0.4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338909
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  • 9
    Electronic Resource
    Electronic Resource
    The activation energy of copper shallow acceptors in mercury cadmium telluride (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 787-789 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The thermal activation energy (E0) of isolated copper shallow acceptors in bulk Hg0.8Cd0.2Te has been determined using variable-temperature Hall measurements on samples with 77-K carrier concentrations ranging between 1015 and 1017 cm−3. It was found that the decrease of the activation energy with the increasing hole concentration can be adequately described by the screening of the acceptor potential by free carriers. The measured E0 (11.5 meV) also agrees well with that predicted by the effective-mass theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338181
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  • 10
    Electronic Resource
    Electronic Resource
    The temperature dependence of the anomalous Hall effects in p-type HgCdTe (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 1571-1577 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The anomalous Hall effects of narrow-band-gap p-type HgCdTe, which manifest themselves as negative Hall coefficients at low temperatures, have caused serious problems in material characterization in the past two decades. These phenomena are now widely recognized as being caused by the inverted surface effect describable by Petritz's two-layer model [Phys. Rev. 110, 1254 (1958)]. We report results from variable-temperature Hall measurements on p-type HgCdTe liquid-phase epitaxy and bulk slices with bare, anodically sulfidized, and anodically oxidized surfaces. We show that the Hall anomalies can be eliminated by depositing an anodic sulfide layer on the surface and subsequently can be restored by removing the sulfide layer. Based on Petritz's two-layer model, we were able to use the same set of bulk transport parameters and different sets of surface transport parameters to fit the experimental temperature-dependent Hall coefficient and Hall mobility curves of the same sample with surfaces that have been subjected to different chemical treatments. It was demonstrated that the Hall anomalies occurred when the n-type surface conductivity increased relative to the p-type bulk conductivity. The surface conductivity is mainly controlled by the density of fixed positive surface charges which was found to be larger on an anodically oxidized surface and smaller on an anodically sulfidized surface than on a bare surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342975
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