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Kitagawa S, Ikeda H, Nakai Y, Hattori T, Ishida K, Kamihara Y, Hirano M, Hosono H. Metamagnetic behavior and Kondo breakdown in heavy-fermion CeFePO. PHYSICAL REVIEW LETTERS 2011; 107:277002. [PMID: 22243324 DOI: 10.1103/physrevlett.107.277002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Indexed: 05/31/2023]
Abstract
We report that nonmagnetic heavy-fermion (HF) iron oxypnictide CeFePO with two-dimensional XY-type anisotropy shows a metamagnetic behavior at the metamagnetic field H(M)≃4 T perpendicular to the c axis and that a critical behavior is observed around H(M). Although the magnetic character is entirely different from that in other Ce-based HF metamagnets, H(M) in these metamagnets is linearly proportional to the inverse of the effective mass, or to the temperature where the susceptibility shows a peak. This finding suggests that H(M) is a magnetic field breaking the local Kondo singlet, and the critical behavior around H(M) is driven by the Kondo breakdown accompanied by the Fermi-surface instability.
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Sugiyama T, Hirose T, Nakashima M, Ishida K, Oki Y, Murata Y, Kusumoto S, Shirai T, Yamaoka T, Okuda K, Ohnishi T, Ohmori T, Adachi M. Evaluation of the efficacy and safety of the combination of gemcitabine and nedaplatin for elderly patients with advanced non-small-cell lung cancer. Oncology 2011; 81:273-80. [PMID: 22122886 DOI: 10.1159/000334430] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Accepted: 10/11/2011] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The aim of the present study was to retrospectively assess the safety and efficacy of the combination of gemcitabine and nedaplatin in elderly patients with advanced non-small-cell lung cancer (NSCLC). METHODS Patients ≥75 years with previously untreated NSCLC who underwent chemotherapy consisting of gemcitabine (800 mg/m(2) on days 1 and 8) and nedaplatin (80 mg/m(2) on day 1) every 3 weeks were retrospectively analyzed. RESULTS Of the 35 patients, 28 were men and 7 were women, with a mean age of 78 years (range 75-87); 10 patients had stage IIIB disease and 25 patients had stage IV disease. The overall response rate was 45.7% (95% confidence interval 28.8-63.4). The median survival time was 14 months (range 3-44). Grade 3-4 toxicities included neutropenia in 74.3%, thrombocytopenia in 48.6%, anemia in 34.3%, hepatic dysfunction in 11.4%, and infection in 2.9%. There were no treatment-related deaths. There were no differences in response rate and survival between patients aged 75-79 years and patients ≥80 years, although grade 3-4 thrombocytopenia and anemia were significantly more frequent in patients ≥80 years. CONCLUSION Our results suggest that the combination of gemcitabine and nedaplatin is effective and well tolerated for selected elderly patients with advanced NSCLC.
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Dmitrienko VE, Ovchinnikova EN, Kokubun J, Ishida K, Chizhikov VA, Collins S. Probing the local sense of the Dzyaloshinskii-Moriya vector: neutrons versusX-rays. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311079712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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79
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Omori T, Ando K, Okano M, Xu X, Tanaka Y, Ohnuma I, Kainuma R, Ishida K. Superelastic effect in polycrystalline ferrous alloys. Science 2011; 333:68-71. [PMID: 21719673 DOI: 10.1126/science.1202232] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
In superelastic alloys, large deformation can revert to a memorized shape after removing the stress. However, the stress increases with increasing temperature, which limits the practical use over a wide temperature range. Polycrystalline Fe-Mn-Al-Ni shape memory alloys show a small temperature dependence of the superelastic stress because of a small transformation entropy change brought about by a magnetic contribution to the Gibbs energies. For one alloy composition, the superelastic stress varies by 0.53 megapascal/°C over a temperature range from -196 to 240°C.
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Fujita N, Matsushita T, Ishida K, Sasaki K, Kubo S, Matsumoto T, Kurosaka M, Tabata Y, Kuroda R. An analysis of bone regeneration at a segmental bone defect by controlled release of bone morphogenetic protein 2 from a biodegradable sponge composed of gelatin and β-tricalcium phosphate. J Tissue Eng Regen Med 2011; 6:291-8. [DOI: 10.1002/term.432] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2010] [Accepted: 03/24/2011] [Indexed: 11/05/2022]
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Nishizuka S, Ishida K, Uesugi N, Matsuo T, Chiba T, Ikeda M, Sugai T, Otsuka K, Koeda K, Wakabayashi G. Identification of chemosensitivity markers for postoperative adjuvant chemotherapy using cellular, molecular, and immunohistochemical profiles of advanced carcinomas from gastrointestinal tract. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.4_suppl.55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
55 Background: The prediction of chemotherapeutic efficacy is a fundamental problem. We have developed an effective system to identify prediction markers based on an in vitro approach using a quantitative matrix of chemosensitivity assay (CSA) and protein expression by reverse-phase protein lysate microarrays (RPA), followed by tissue microarrays (TMA). In the present study, we attempted to identify predictive markers by extracting candidate proteins from the “chemosensitivity x protein expression matrix” of 12 cancer cell lines and 12 chemotherapeutic agents, followed by examination using TMA in post-operative adjuvant chemotherapy for advanced gastric and colorectal carcinomas. Methods: The “chemosensitivity x protein expression matrix” was constructed using quantitative data from CSA and RPA. TMA was constructed from parafin-embedded, formalin-fixed surgically removed tissues from 30 gastric and 49 colorectal carcinomas. All subjects had received post-operative adjuvant chemotherapy. Expression and/or localization of candidate marker proteins on TMA were evaluated for the comparison of time to relapse (TTR) between the groups based on the score of each candidate marker protein. Results: TTR was compared in each binary score for a candidate marker that showed a moderate to high correlation coefficient of the “chemosensitivity x protein expression matrix” of 144 combinations. Among these candidate combinations, it was found that the presence/absence of NFkB protein nuclear localization and the TTR of those patients who received 5-FU based adjuvant chemotherapy differed significantly. The three-year relapse rate was 28% in NFkB absent cases, whereas it was 84% in the present cases. Conclusions: We identified NFkB nuclear localization as an effective 5-FU based chemotherapeutic prediction marker in the context of gastrointestinal post-operative adjuvant chemotherapy. The combination of CSA, RPA, and TMA technologies may allow rapid identification of chemotherapeutic prediction markers. No significant financial relationships to disclose.
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Ohno S, Ishida K, Tahara S, Okada T. Electrical properties of molten CuCl-Cu 2Se mixtures. EPJ WEB OF CONFERENCES 2011. [DOI: 10.1051/epjconf/20111501003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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83
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Ihara Y, Hattori T, Ishida K, Nakai Y, Osaki E, Deguchi K, Sato NK, Satoh I. Anisotropic magnetic fluctuations in the ferromagnetic superconductor UCoGe studied by direction-dependent 59Co NMR measurements. PHYSICAL REVIEW LETTERS 2010; 105:206403. [PMID: 21231251 DOI: 10.1103/physrevlett.105.206403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Indexed: 05/30/2023]
Abstract
We have carried out direction-dependent 59Co NMR experiments on a single crystal sample of the ferromagnetic superconductor UCoGe in order to study the magnetic properties in the normal state. The Knight-shift and nuclear spin-lattice relaxation rate measurements provide microscopic evidence that both static and dynamic susceptibilities are ferromagnetic with strong Ising anisotropy. We discuss that superconductivity induced by these magnetic fluctuations prefers spin-triplet pairing state.
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Sasaki M, Yamazaki A, Haraguchi A, Tatsumi M, Ishida K, Ikadai H. Serological survey of Encephalitozoon cuniculi infection in Japanese dogs. J Parasitol 2010; 97:167-9. [PMID: 21348630 DOI: 10.1645/ge-2540.1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Antibodies to Encephalitozoon cuniculi were examined by enzyme-linked immunosorbent assay using E. cuniculi PTP2 recombinant protein and by Western blot analysis on a total of 472 dog serum samples that had been collected in Japan. Of these samples, 21.8% (103/472) had antibodies against E. cuniculi. Each of 5 serum samples that showed high (>1.0) or low (<0.1) OD value was selected randomly and further examined by Western blot using E. cuniculi-native antigens. All samples with high OD values reacted with specific E. cuniculi proteins, including an antigen of approximately 35 kDa corresponding with PTP2; sera with low OD values did not recognize this E. cuniculi band. This study is the first to demonstrate the prevalence of E. cuniculi infection in dogs in Japan.
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Nakai Y, Iye T, Kitagawa S, Ishida K, Ikeda H, Kasahara S, Shishido H, Shibauchi T, Matsuda Y, Terashima T. Unconventional superconductivity and antiferromagnetic quantum critical behavior in the isovalent-doped BaFe2(As1-xPx)2. PHYSICAL REVIEW LETTERS 2010; 105:107003. [PMID: 20867541 DOI: 10.1103/physrevlett.105.107003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2010] [Indexed: 05/29/2023]
Abstract
Spin dynamics evolution of BaFe2(As(1-x)Px){2} was probed as a function of P concentration via 31P NMR. Our NMR study reveals that two-dimensional antiferromagnetic (AF) fluctuations are notably enhanced with little change in static susceptibility on approaching the AF phase from the superconducting dome. Moreover, the magnetically ordered temperature θ deduced from the relaxation rate vanishes at optimal doping. These results provide clear-cut evidence for a quantum-critical point, suggesting that the AF fluctuations associated with the quantum-critical point play a central role in the high-T(c) superconductivity.
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Ishikawa K, Ise M, Ohnuma I, Kainuma R, Ishida K. Phase equilibria and stability of the bcc aluminide in the Co-Cr-Al system. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19981020924] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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87
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Kinashi K, Nakamura S, Ono Y, Ishida K, Ueda Y. Reverse photochromism of spiropyran in silica. J Photochem Photobiol A Chem 2010. [DOI: 10.1016/j.jphotochem.2010.05.012] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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88
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Fukushima D, Doi H, Fukushima K, Katsura K, Ogawa N, Sekiguchi S, Fujimori K, Sato A, Satomi S, Ishida K, Fukushima K. Glutamate exocrine dynamics augmented by plasma glutamine and the distribution of amino acid transporters of the rat pancreas. JOURNAL OF PHYSIOLOGY AND PHARMACOLOGY : AN OFFICIAL JOURNAL OF THE POLISH PHYSIOLOGICAL SOCIETY 2010; 61:265-271. [PMID: 20610855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Accepted: 05/25/2010] [Indexed: 05/29/2023]
Abstract
The nutritional and physiological roles of amino acid (AA)s have been investigated for individual organs. In the current study, we focused on the dynamics of glutamate and transport systems in the pancreas. We employed original procedures to obtain rat pancreatic juice (PJ) subjected to intravenous administration of alanyl-glutamine (AG) for AA analysis. The pancreatic expressions of the transporters were evaluated by immunohistochemistry. We found that glutamate was secreted into the PJ in the basal state. The intravenous administration of AG increased the concentration and total amount of glutamate excreted into the PJ. In terms of the transport systems, L-type AA transporter (LAT1) was identified exclusively in the islet cells. Glutamate transporter 1 (GLT1), glutamate-aspartate transporter (GLAST), vesicular glutamate transporter 1 (VGUT1) and cystine/glutamic acid transporter (xCT) were found in the islet cells. xCT was identified in the duct cells as well, but was not accompanied by the expression of 4F2 heavy chain (4F2hc) staining in the islets and the acinar cells, similar to neutral AA transporter (ASCT2) or b0,+-type AA transporter 1(BAT1). Excitatory AA transporter (EAAC) was identified only in the acinar cells. Glutamate was exclusively found in the acinar cells. We revealed the novel dynamics of glutamate in the rat PJ. The glutamate secretion into the PJ was augmented by plasma glutamine, indicating the de novo metabolisms of glutamate, together with the local expression of the related transporters.
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Tamaki K, Sasano H, Ishida T, Ishida K, Miyashita M, Takeda M, Amari M, Harada-Shoji N, Kawai M, Hayase T, Tamaki N, Ohuchi N. The Correlation Between Ultrasonographic Findings and Pathologic Features in Breast Disorders. Jpn J Clin Oncol 2010; 40:905-12. [DOI: 10.1093/jjco/hyq070] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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90
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Ochi Y, Konishi S, Takizawa T, Ikegami T, Yamamoto S, Ishida K, Sato A. Studies on Infectious Hepatitis in the Dog (I). ACTA ACUST UNITED AC 2010. [DOI: 10.1111/j.1439-0442.1956.tb00118.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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91
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Hatakeyama S, Ishida K, Takeda Y. Changes in cell characteristics due to retinoic acid; specifically, a decrease in the expression of claudin-1 and increase in claudin-4 within tight junctions in stratified oral keratinocytes. J Periodontal Res 2010; 45:207-15. [DOI: 10.1111/j.1600-0765.2009.01219.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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92
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Tanaka Y, Himuro Y, Kainuma R, Sutou Y, Omori T, Ishida K. Ferrous Polycrystalline Shape-Memory Alloy Showing Huge Superelasticity. Science 2010; 327:1488-90. [DOI: 10.1126/science.1183169] [Citation(s) in RCA: 370] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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93
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Brown PJ, Gandy AP, Ishida K, Ito W, Kainuma R, Kanomata T, Neumann KU, Oikawa K, Ouladdiaf B, Sheikh A, Ziebeck KRA. Magnetic and structural properties of the magnetic shape memory compound Ni(2)Mn(1.48)Sb(0.52). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:096002. [PMID: 21389429 DOI: 10.1088/0953-8984/22/9/096002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Magnetization and high resolution neutron powder diffraction measurements on the magnetic shape memory compound Ni(2)Mn(1.48)Sb(0.52) have confirmed that it is ferromagnetic below 350 K and undergoes a structural phase transition at T(M)≈310 K. The high temperature phase has the cubic L2(1) structure with a = 5.958 Å, with the excess manganese atoms occupying the 4(b) Sb sites. In the cubic phase above ≈310 K the manganese moments are ferromagnetically aligned. The magnetic moment at the 4(a) site is 1.57(12) μ(B) and it is almost zero (0.15(9) μ(B)) at the 4(b) site. The low temperature orthorhombic phase which is only fully established below 50 K has the space group Pmma with a cell related to the cubic one by a Bain transformation a(orth) = (a(cub) + b(cub))/2; b(orth) = c(cub) and c(orth) = (a(cub) - b(cub)). The change in cell volume is ≈2.5%. The spontaneous magnetization of samples cooled in fields less than 0.5 T decreases at temperatures below T(M) and at 2 K the magnetic moment per formula unit in fields up to 5.5 T is 2.01(5) μ(B). Neutron diffraction patterns obtained below ≈132 K gave evidence for a weak incommensurate magnetic modulation with propagation vector (2/3, 1/3, 0).
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Iwami K, Noda T, Ishida K, Morishima K, Nakamura M, Umeda N. Bio rapid prototyping by extruding/aspirating/refilling thermoreversible hydrogel. Biofabrication 2010; 2:014108. [PMID: 20811123 DOI: 10.1088/1758-5082/2/1/014108] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This paper reports a method for rapid prototyping of cell tissues, which is based on a system that extrudes, aspirates and refills a mixture of cells and thermoreversible hydrogel as a scaffold. In the extruding mode, a cell-mixed scaffold solution in the sol state is extruded from a cooled micronozzle into a temperature-controlled substrate, which keeps the scaffold in the gel state. In the aspiration mode, the opposite process is performed by Bernoulli suction. In the refilling mode, the solution is extruded into a groove created in the aspiration mode. The minimum width of extruded hydrogel pattern is 114 +/- 15 microm by employing a nozzle of diameter 100 microm, and that of aspirated groove was 355 +/- 10 microm using a 500 microm-diameter nozzle. Gum arabic is mixed with the scaffold solution to avoid peeling-off of the gel pattern from the substrate. Patterning of Sf-9 cell tissue is demonstrated, and the stability of the patterned cell is investigated. This system offers a procedure for rapid prototyping and local modification of cell scaffolds for tissue engineering.
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Sakuma K, Watanabe K, Hotta N, Koike T, Ishida K, Katayama K, Akima H. The adaptive responses in several mediators linked with hypertrophy and atrophy of skeletal muscle after lower limb unloading in humans. Acta Physiol (Oxf) 2009; 197:151-9. [PMID: 19432591 DOI: 10.1111/j.1748-1716.2009.01995.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
AIM To determine the adaptive changes in several molecules regulating muscle hypertrophy and atrophy after unloading, we examined whether unilateral lower limb suspension changes the mRNA and protein levels of SRF-linked (RhoA, RhoGDI, STARS and SRF), myostatin-linked (myostatin, Smad2, Smad3 and FLRG) and Foxo-linked (P-Akt, Foxo1, Foxo3a and Atrogin-1) mediators. METHODS A single lower limb of each of eight healthy men was suspended for 20 days. Biopsy specimens were obtained from the vastus lateralis muscle pre- and post-suspension. RESULTS The volume of the vastus lateralis muscle was significantly decreased after unloading. The amount of RhoA, RhoGDI or SRF protein in the muscle was not significantly changed post-suspension. An RT-PCR semiquantitative analysis showed increased levels of myostatin mRNA but not Smad2, Smad3 or FLRG mRNA. Unloading did not elicit significant changes in the amount of p-Smad3 or myostatin protein in the muscle. The amount of p-Akt protein was markedly reduced in the unloaded muscle. Lower limb SUSPENSION DID NOT INFLUENCE THE EXPRESSION PATTERN OF FOXO1, FOXO3A OR ATROGIN-1. CONCLUSION Unloading inducing a mild degree of muscle atrophy may decrease p-Akt and increase myostatin but not SRF-linked mediators.
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Yoshioka M, Tanaka H, Konno H, Takahashi T, Onodera H, Ishida K. G.P.17.02 Efficacy and complications of gastrostomy tube feeding in patients with muscular dystrophies. Neuromuscul Disord 2009. [DOI: 10.1016/j.nmd.2009.06.343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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97
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Mori T, Ishida K, Mukumoto S, Yamada Y, Imokawa G, Kabashima K, Kobayashi M, Bito T, Nakamura M, Ogasawara K, Tokura Y. Comparison of skin barrier function and sensory nerve electric current perception threshold between IgE-high extrinsic and IgE-normal intrinsic types of atopic dermatitis. Br J Dermatol 2009; 162:83-90. [DOI: 10.1111/j.1365-2133.2009.09440.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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98
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Sutou Y, Yamauchi K, Suzuki M, Furukawa A, Omori T, Takagi T, Kainuma R, Nishida M, Ishida K. High maneuverability guidewire with functionally graded properties using new superelastic alloys. MINIM INVASIV THER 2009; 15:204-8. [PMID: 16966132 DOI: 10.1080/13645700600836109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Nitinol shape memory alloys (SMAs) are attracting considerable attention as core materials for medical guidewires because of their excellent flexibility and shape retention. However, since Nitinol guidewires possess low rigidity, the pushability and torquability of the guidewires are insufficient. On the other hand, although guidewires made of stainless steel have high pushability, plastic deformation occurs easily. We have developed a new class of superelastic guidewires with functionally graded properties from the tip to the end by using new SMA core materials such as Cu-Al-Mn-based or Ni-free Ti-Mo-Sn SMAs. The tip portion of the guidewire shows excellent superelasticity (SE), while the body portion possesses high rigidity. These functionally graded characteristics can be realized by microstructural control. These guidewires with functionally graded properties show excellent pushability and torquability and are considerably easier to handle than conventional guidewires with Nitinol or stainless steel cores. Moreover, a metallic catheter using a Ni-free Ti-based SMA with high biocompatibility is introduced.
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Morito H, Oikawa K, Fujita A, Fukamichi K, Kainuma R, Ishida K. Stress-assisted large magnetic-field-induced strain in single-variant Co-Ni-Ga ferromagnetic shape memory alloy. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:256002. [PMID: 21828446 DOI: 10.1088/0953-8984/21/25/256002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The magnetic anisotropy and the magnetic-field-induced strain (MFIS) in a single-variant Co(47.5)Ni(22.5)Ga(30.0) ferromagnetic shape memory alloy (FSMA) have been investigated. From the magnetization curves for the single crystal, the hard c-axis was confirmed, and the uniaxial magnetic anisotropy constant K(u) at 300 K was evaluated to be -1.07 × 10(6) erg cm(-3) for the single-variant Co(47.5)Ni(22.5)Ga(30.0) martensite phase. The magnitude of compressive shear stress for the variant rearrangement was estimated to be 6.0-7.5 MPa from the stress-strain curves. An assisted stress τ(assist) of 6.0 MPa was applied before applying a magnetic field, and then a magnetic stress τ(mag) of 0.3 MPa was added. As a result, a large MFIS of about 7.6 % was obtained at room temperature in the martensite phase of the single-variant Co(47.5)Ni(22.5)Ga(30.0).
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Tsuzuki M, Ishida K. Ueber die Beeinflussung der Typhusbazillen bei Typhusrekonvaleszenten durch Kalium jodatum sowie Acidum arsenicosum. Dtsch Med Wochenschr 2009. [DOI: 10.1055/s-0028-1143016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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