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  • 1
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    MiR-520h-mediated FOXC2 regulation is critical for inhibition of lung cancer progression by resveratrol (2013)
    Nature Publishing Group (NPG)
    In: Oncogene
    Details
    Publication Date: 2013-01-25
    Description: MiR-520h-mediated FOXC2 regulation is critical for inhibition of lung cancer progression by resveratrol Oncogene 32, 431 (24 January 2013). doi:10.1038/onc.2012.74 Authors: Y-H Yu, H-A Chen, P-S Chen, Y-J Cheng, W-H Hsu, Y-W Chang, Y-H Chen, Y Jan, M Hsiao, T-Y Chang, Y-H Liu, Y-M Jeng, C-H Wu, M-T Huang, Y-H Su, M-C Hung, M-H Chien, C-Y Chen, M-L Kuo & J-L Su
    Keywords: FOXC2miR-520hresveratrolmetastasis
    Print ISSN: 0950-9232
    Topics: Medicine
    Published by Nature Publishing Group (NPG)
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  • 2
    Electronic Resource
    Electronic Resource
    Crystal growth and characterization of heavily MgO-doped LiNbO3 (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 7635-7639 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Single crystals of LiNbO3 doped with up to 25 mol % of MgO were successfully grown. No precipitates were discovered. In studies of the change of the Curie temperatures and Raman spectra with composition, an abrupt change was observed near the composition of 10 mol % of MgO. From the model of Gallagher relating Tc and cation vacancies and the cation occupation calculated by x-ray data, it is proposed that the Mg atoms replace the Nb atoms at Li sites. When the Nb atoms are exhausted, the Mg atoms replace the Li sites and Li vacancies are created. The amount of Mg in the LiNbO3 structure could be predicted better from the 151 cm−1 peak shift in Raman spectra than from Tc.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347533
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  • 3
    Electronic Resource
    Electronic Resource
    The magnetoresistance and microstructure of Fe–xCr–10Co alloy thin films (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 8593-8597 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Large negative magnetoresistance (MR) is observed in Fe–xCr–10Co (x=10,20,30,40,50,- 60,70, and 80 wt %) ternary heterogeneous alloy films prepared by the IBS (ion beam sputter) deposition process. All the as-deposited films consisted of the α phase alone. After aging treatment, the α phase is decomposited into two phases: the α1 (Fe–Co rich phase) and α2 (Cr rich phase). In the granular alloy, the GMR effect is obtained by virtue of the interface scattering between α1 and α2. After isothermal aging at 400 °C for 1 h, the largest MR of −27% appears around the Cr content of 60 wt % at 77 K and 14 kOe. The MR ratio of Fe–50Cr–10Co and Fe–70Cr–10Co is −12% and −20%, respectively, at the same condition. The MR ratio is also obviously effected by the Cr (or Fe) content in the alloy system. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362455
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  • 4
    Electronic Resource
    Electronic Resource
    Giant magnetoresistance and phase decomposition of Fe–XCr–Co (WFe/WCo=1) thin film granular alloys (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 4523-4527 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this study, the giant magnetoresistance (MR) effect was observed in Fe–XCr–Co (WFe/WCo=1, X=27, 40, 50, 60, 70, and 80 wt %) ternary heterogeneous alloy films. After aging, the separated phases and lattice images of the α1 (Fe–Co rich phase) and α2 (Cr rich phase) were further determined by high resolution transmission electron microscope. Experimental results indicate that the MR variations in Fe–Cr–Co thin films alloys were associated with the heterogeneous microstructure. By isothermal aging at 550 °C for 80 min, the largest MR of −43% appears for the film with the composition of 40(Fe/Co)–60Cr at 77 K under a field of 14 kOe. At the same treatment condition, the MR ratios of 50(Fe/Co)–50Cr and 30(Fe/Co)–70Cr are −13.2% and −21.3%, respectively. Cr content, therefore, significantly affected the MR ratio. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.363557
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  • 5
    Electronic Resource
    Electronic Resource
    Hydrogen passivation in Cd1−xZnxTe studied by photoluminescence (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 493-495 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is shown for the first time that deep defects in single-crystal CdZnTe can be passivated by atomic hydrogen. This treatment can result in a strong enhancement in the photoluminescence intensity of all excitonic transitions. In addition, it is shown that after hydrogenation, the higher-order emission of free exciton in CdZnTe alloys is observed for the first time; the mixed bands can be separated; the LO phonon energy, the binding energy of free exciton, and the concentration of Zn content are also determined. From the experimental results it is inferred that hydrogenation not only improves the sample quality but also provides an excellent opportunity to probe the physical properties of a material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104618
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  • 6
    Electronic Resource
    Electronic Resource
    Fabrication of ZnSe quantum dots under Volmer–Weber mode by metalorganic chemical vapor deposition (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 70 (1997), S. 2256-2258 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The possibility of fabricating quantum dots under Volmer–Weber growth mode is investigated. Layers of ZnSe/ZnS were grown by metalorganic chemical vapor deposition on both Si and GaAs substrates. The images of surface morphology, taken by atomic force microscopy, showed that the layers were grown in three-dimensional islands. Blueshift was observed in the photoluminescence spectra up to room temperature for these samples. This blueshift was shown to originate from the ZnSe islands. The effect of ZnSe growth duration was investigated. It was found that the blueshift increased with shorter ZnSe growth durations, but this near band gap emission disappeared when the ZnSe growth duration was longer than 5 s. Effects of quantum confinement and strain were considered to resolve the origin of the blueshift. Our result suggests that carrier confinement plays a dominant role. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.118831
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  • 7
    Electronic Resource
    Electronic Resource
    Enhancement of titanium nitride barrier metal properties by nitrogen radical assisted metalorganic chemical vapor deposition (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 2580-2582 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Using metalorganic chemical vapor deposition assisted by a nitrogen radical irradiation generated by rf plasma, we have enhanced the quality and the step coverage of titanium nitride barrier metals for the contact holes with a high aspect ratio and a submicron radius. Electrical resistivity measurements show that the film resistivity improves by a factor of five as the proper nitrogen irradiation has been applied. The step coverage in a contact hole with 0.4 μm diam and 3:1 aspect ratio has been improved from 50% to 80% by applying nitrogen plasma, clearly demonstrating the effectiveness of this technique in the conformal deposition of barrier metals for the ultra-large scale integration. The incident nitrogen radical is believed to play several roles, such as the enhancement of surface migration rate of molecules and the reduction of the amount of hydrocarbon incorporating into the film during the deposition. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.116190
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  • 8
    Electronic Resource
    Electronic Resource
    Persistent photoconductivity in SiGe/Si quantum wells (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 84 (1998), S. 877-880 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Persistent photoconductivity (PPC) has been observed in boron-doped Si1−xGex/Si quantum wells. The decay kinetics of the PPC effect can be well described by a stretched-exponential function, Ippc(t)=Ippc(0)exp[−(t/τ)β](0〈β〈1), which is usually observed in many disorder materials. Through the studies of the PPC effect under various conditions, such as different temperature, different photon energy of photoexcitation, and different Ge content, we identify that the alloy potential fluctuations induced by compositional disorder are the origin of the PPC effect in Si1−xGex/Si quantum wells. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.368150
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  • 9
    Electronic Resource
    Electronic Resource
    Preparation and magnetic properties of Ba–Co2Z and Sr–Zn2Y ferrites (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 6247-6249 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have prepared Ba–Co2Z and Sr–Zn2Y ferrites by mixing SrCO3 (BaCO3), Co2O3 (ZnO), and Fe2O3 and calcinating in air and O2. The effects of sintering atmosphere (O2 and Ar) and sintering temperatures (1373–1573 K) on the structural, magnetic, and electrical properties have been measured. The Ba–Co2Z sample sintered at 1573 K under a flowing O2 exhibits superior dc electrical resistivity (∼108 Ω-cm), high initial permeability (u′∼21), and low loss factor (F∼1.6×10−3) at 20 MHz. The related XRD and SEM/EDS analyses of these samples have also been studied to correlate these properties. These results indicate that significant modification of magnetic properties up to 20 MHz can be achieved with the addition of the quaternary component and proper control of the processing oxygen atmosphere. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372669
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  • 10
    Electronic Resource
    Electronic Resource
    Study of SmTM7.3 microstructure by a simplified method and its correlation to properties (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 3772-3774 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By using a newly developed potentiostatic etching technique, the microstructural evolution of an SmTM7.3 (TM=Co/Fe/Cu/Zr) alloy during different stages of heat treatment has been easily and successfully observed under a conventional scanning electron microscope (SEM). Specimens up to several centimeters were examined, with their features being statistically measured. It is found that the cell structure has been well developed with a median size of 110 nm after aging 2 h at 1123 K, while the intrinsic coercivity (iHc) was as low as 2 kOe. The cell size grows slowly during subsequent heat treatment to a median size of 220 nm after the whole treatment. For aging at 1123 K for 4 h, iHc value is around 4 kOe, and the platelet phase appears. After aging at 1123 K for 8 h, a large zonal phase and grain boundary phase are visible. It is thus believed that the zonal phase appears after aging for a time period between 4 and 8 h, corresponding to the iHc of 600 kA/m (7.5 kOe). No new microconstituent appears after the isothermal aging for more than 8 h, however growth proceeds. After the whole heat treatment cycle, iHc is much greater than 2400 kA/m (30 kOe), with the zonal phase ranging in size from 300 to 900 nm (in width, averaged 400 nm), 1 to 5 μm in length (averaged 3.6 μm), and 1 to 6 μm in separation (averaged 3.5 μm). The zonal and the grain boundary phases are thus concluded to be the dominating structure for the extremely high coercivity of this alloy. A model is proposed to explain the etching sequence of the microconstituents during the potentiostatic etching, and is successful to explain the resultant microstructure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338638
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