33 Result(s)

Article

Regulation of the expression of MHC class I-related chain A, B (MICA, MICB) via chromatin remodeling and its impact on the susceptibility of leukemic cells to the cytotoxicity of NKG2D-expressing cells

Innate immune cells such as natural killer (NK) cells play a crucial role in antitumor immune responses. NKG2D is a major activating immunoreceptor expressed in not only NK cells but also CD8⁺ T cells and shows c...

N Kato, J Tanaka, J Sugita, T Toubai, Y Miura, M Ibata, Y Syono, S Ota, T Kondo… in Leukemia (2007)

Article

Structural evolutions of an obsidian and its fused glass by shock-wave compression

Shock-recovery experiments for obsidian and its fused glass have been carried out with pressure up to 35 GPa. Structural evolution accompanying the shock compression was investigated using X-ray diffraction te...

K. Shimoda, M. Okuno, Y. Syono, M. Kikuchi, K. Fukuoka… in Physics and Chemistry of Minerals (2004)

Article

An X-ray diffraction study of shock-wave-densified SiO₂ glasses

 The densification and structural changes in SiO₂ glass compressed up to 43.4 GPa by shock experiments are investigated quantitatively by the X-ray diffraction technique. Direct structural data (average Si–O and ...

Y. Shimada, M. Okuno, Y. Syono, M. Kikuchi, K. Fukuoka… in Physics and Chemistry of Minerals (2002)

Chapter

NMR Study of the Tl-Based High-T_c Cuprate Tl(Ba,Sr)₂(Y,Ca)Cu₂O₇ in a Wide Hole Concentration Range from the Antiferromagnetic to the Overdoped Region

Many studies on high-T _c cuprates conducted in this decade have repeatedly emphasized universality in the electronic phase diagram. Undoped cuprates are, as is well known, insulators and are two-d...

T. Goto, S. Nakajima, Y. Syono, T. Fukase in Materials Science in Static High Magnetic … (2002)

Article

A Raman spectroscopic study of shock-wave densification of anorthite (CaAl₂Si₂O₈) glass

Structural modifications induced by shock-wave compression up to 40 GPa in anorthite glass are investigated by Raman spectroscopy. In the first investigation, densification increases with increasing shock pre...

B. Reynard, M. Okuno, Y. Shimada, Y. Syono… in Physics and Chemistry of Minerals (1999)

Article

A Raman spectroscopic study of shock-wave densification of vitreous silica

The densification processes in SiO₂ glass induced by shock-wave compression up to 43.4 GPa are investigated by Raman spectroscopy. At first, densification increases with increasing shock pressure. A maximum densi...

M. Okuno, B. Reynard, Y. Shimada, Y. Syono… in Physics and Chemistry of Minerals (1999)

Chapter and Conference Paper

Crystal growth of (Bi,Pb)₂Sr₂CaCu₂O_z and their superconducting properties

Superconducting single crystal of Bi₂Sr₂CaCu₂O_z was grown from stoichiometric melt composition. The effect of Pb-do** on the superconducting properties was studied. The superconducting transition temperature (T

H. Faqir, M. Mansori, M. Kikuchi, Y. Syono, P. Satre… in Advances in Superconductivity XI (1999)

Chapter and Conference Paper

Relation between superconductivity and oxidation state Pb of (Pb,Cu)Sr₂(Ca,Y)Cu₂O_y and (Pb,Cu)(Sr,La)₂CuO_y studied by chemical analysis and XPS measurements

Chemical analysis by K₂Cr₂O₇ titration and the binding energy measurement of Pb 4f_7/2 by XPS were applied for the evaluation of valence state of Pb in (Pb,Cu)Sr₂(Ca,Y)Cu₂O_y and (Pb,Cu)(Sr,La)₂CuO_y. Correlation be...

M. Kikuchi, M. Nagoshi, M. Shida, K. Kanehashi… in Advances in Superconductivity XI (1999)

Chapter and Conference Paper

YSr₂Cu_3-xM_xO_y (M= Fe and Mo) Ceramics Studied by Photoemission

We have investigated superconducting properties and electronic structures of YSr₂Cu_3-x M _x O _y (M= Fe and Mo) ceramics with var...

N. Sanada, T. Honjo, S. Shimizu, Y. Suzuki, Y. Fukuda… in Advances in Superconductivity X (1998)

Article

Growth of high-quality Bi₂Sr₂CaCu₂O_z crystal and characterization

We report growth of high-quality Bi₂Sr₂CaCu₂ O_zsingle crystals with dimensions 2 × 1 × 0.03 mm³ with a melt and growth technique. The composition of this crystal is homogeneous and very close to the stoichiometri...

H. Faqir, G. Vacquier, H. Chiba, M. Kikuchi, Y. Muraoka… in Journal of Materials Research (1997)

Article

Cu/Tl-NMR study on the non magnetic impurity effect in Tl-based high-T _c cuprate TlBa₂Ca(Cu_1−zZn_z)₂ O_7+δ (Tl1212)

Cu-NMR study has been performed on the Zn-substituted TlBa₂Ca(Cu_1−zZn_z)₂O_7+δ belonging to the over-doped region. The temperature dependence of the Knight shift was successfully explained in terms of the partially...

T. Goto, S. Nakajima, M. Kikuchi, Y. Syono, T. Fukase in Czechoslovak Journal of Physics (1996)

Chapter and Conference Paper

Photoemission and Inverse-photoemission Studies on Metal-insulator Transition of Bi-2201 Ceramics

Measurements of x-ray (XPS) and inverse-photoemission (IPES) spectroscopy have been performed on polycrystalline Bi₂Sr_2-xM_xCuO_y (M=La, Nd, and Gd, 0.4 ≤ x ≤ 0.9) ceramics in which metal-insulator transition is ob...

N. Sanada, Y. Suzuki, M. Shimomura, Y. Fukuda… in Advances in Superconductivity VIII (1996)

Article

Magnetic torque of oriented bulk Bi2212 by the shock-loading method

The magnetic torque of oriented bulk specimen of Bi₂Sr₂CaCu₂O_8+δ by the shock-loading method was measured under magnetic fields up to 8 kOe in the temperature range from 4.2 to 100 K. The torque amplitude of the ...

S. Kawamata, K. Okuda, M. Kikuchi, H. Hikosaka, Y. Syono in Journal of Materials Research (1995)

Article

Synthesis of the B1-type tantalum nitride by shock compression

B1-type tantalum nitride (polycrystalline bulk state) was synthesized by shock compression. Shock-compression recovery experiments of the porous sample of tantalum nitride with a hexagonal structure (CoSn-type...

T. Mashimo, S. Tashiro, T. Toya, M. Nishida, H. Yamazaki… in Journal of Materials Science (1993)

Chapter

Shock Effects on Structural and Superconducting Properties of High T_c Oxides

Shock compression technique has been applied for the research of high T_c oxides in several different ways. Synthesis of high T_c oxides from component oxides by means of shock compression [1–5], as revealed in suc...

Y. Syono, M. Kikuchi in Shock Waves in Materials Science (1993)

Article

Deposition of TiO₂ on heated substrates by the spray-inductively-coupled-plasma technique

Y. Mizoguchi, M. Kagawa, Y. Syono, T. Hirai in Journal of Materials Science Letters (1993)

Article

Synthesis of ultrafine single-component oxide particles by the spray-ICP technique

Ultrafine oxide particles were synthesized by introducing aqueous solutions of metal salts into a high-temperature r.f. inductively coupled plasma (the spray-ICP technique). The particles synthesized were sphe...

M. Suzuki, M. Kagawa, Y. Syono, T. Hirai in Journal of Materials Science (1992)

Chapter and Conference Paper

Phase changes in solids during shock loading and unloading

Polymorphic phase transformations have been found in many substances by shock compression. The transition pressures observed by dynamic and static compression are generally in good agreement, provided that the...

Y. Syono, K. Kusaba, T. Atou, K. Fukuoka in Shock Waves (1992)

Chapter and Conference Paper

NMR Spectra and Relaxation of ²⁰⁵Tl in the Tl₂Ba₂CuO_6-δ (2201) High-T _c Superconductor

The ²⁰⁵Tl NMR in Tl₂Ba₂CuO_6-δ has been measured as a function of temperature and oxygen content. A difference in the line shape for the H//c and the H⊥c has been observed in the oxygen defect sup...

T. Shinohara, T. Goto, T. Sato, T. Fukase… in The Physics and Chemistry of Oxide Superco… (1992)

Chapter and Conference Paper

Hugoniot-measurement study of the stabilized zirconia single crystal

Hugoniot-measurement experiments of the Y₂O₃-doped (9.6 mol%) stabilized zirconia in the pressure range up to 120 GPa were performed by using single crystals to study cubic directly the yielding property, phase t...

T. Mashimo, M. Kodama, K. Kusaba, K. Fukuoka, Y. Syono in Shock Waves (1992)