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From the application point of view, large critical current densities J(c) (H) for superconducting wires are required, preferably for magnetic fields higher than 5 T. Here we show that strong c-axis textured Sr(1-x)K(x)Fe(2)As(2) tapes with nearly isotropic transport J(c) were fabricated by an ex-situ powder-in-tube (PIT) process. At 4.2 K, the J(c) values(More)
High-performance Sr0.6K0.4Fe2As2 (Sr-122) tapes have been successfully fabricated using hot pressing (HP) process. The effect of HP temperatures (850-925°C) on the c-axis texture, resistivity, Vickers micro-hardness, microstructure and critical current properties has been systematically studied. Taking advantage of high degree of c-axis texture, well grain(More)
Improving transport current has been the primary topic for practical application of superconducting wires and tapes. However, the porous nature of powder-in-tube (PIT) processed iron-based tapes is one of the important reasons for low critical current density (Jc) values. In this work, the superconducting core density of ex-situ Sr0.6K0.4Fe2As2 + Sn tapes,(More)
NKG2D is a major activating receptor of NK cells and plays a critical role in tumor immunosurveillance. NKG2D expression in NK cells is inhibited by the histone deacetylase (HDAC) inhibitor valproic acid (VPA) and enhanced by the narrow-spectrum HDAC inhibitor entinostat. We previously demonstrated that entinostat enhanced NKG2D transcription by increasing(More)
BACKGROUND Pancreatic cancer is generally acknowledged as the most common primary malignant tumor, and it is known to be resistant to conventional chemotherapy. Novel, selective antitumor agents are pressingly needed. METHODS CCK-8 and colony formation assay were used to investigate the cell growth. Flow cytometry analysis was used to evaluate the cell(More)
Cu-sheathed SmFeAsO<sub>1-x</sub>F<sub>x</sub> tapes were fabricated by the ex situ powder-in-tube method. A series of low-temperature (400 &#x00B0;C) hot-pressing process and ordinary sintering process was applied on the tapes, respectively. A transport critical current density (J<sub>c</sub>) value of 2.37 &#x00D7; 10<sup>4</sup> A cm<sup>-2</sup> (at 4.2(More)
An approach for the solid-phase synthesis of 4,8-disubstituted-8,9-dihydropyrazino[2,3-g]quinazolin-7(6H)-ones from 4-chloro-7-fluoro-6-nitroquinazoline scaffold is described. A chemoselective reaction of resin-bound arylamines (3) with 4-chloro-7-fluoro-6-nitroquinazoline (8) yielded resin-bound 4-arylamino-7-fluoro-6-nitroquinazolines (4), which were(More)
Copper sheath is the first choice for manufacturing high-T(c) superconducting wires and tapes because of its high electrical and thermal conductivities, low-cost and good mechanical properties. However, Cu can easily react with superconducting cores, such as BSCCO, MgB2 and pnictides, and therefore drastically decrease the transport J(c). Here, we report(More)
Iron-pnictides are hotly studied since 2008 in the superconducting materials research area, due to their special properties and unclear mechanism. Big achievement has been made in the pnictide research during the past years. For practical uses, pnictide superconductor should be fabricated in a form that can be used for different devices. In this paper,(More)
Ag-sheathed Sr<sub>0.6</sub>K<sub>0.4</sub>Fe<sub>2</sub>As<sub>2</sub> superconducting tapes with various thicknesses were produced by flat rolling and cold uniaxial pressing based on an ex-situ powder-in-tube method. The transport critical current density (J<sub>c</sub>) for both rolled and pressed tapes was found to increase with the decrease of tape(More)