101
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Hashimoto Y, Khorsand AR, Savoini M, Koene B, Bossini D, Tsukamoto A, Itoh A, Ohtsuka Y, Aoshima K, Kimel AV, Kirilyuk A, Rasing T. Ultrafast time-resolved magneto-optical imaging of all-optical switching in GdFeCo with femtosecond time-resolution and a μm spatial-resolution. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:063702. [PMID: 24985822 DOI: 10.1063/1.4880015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We developed an ultrafast time-resolved magneto-optical (MO) imaging system with several millidegree resolution of light polarization angle, 100 fs time-resolution, and a micrometer spatial resolution. A CCD camera with about 10(6) pixels is used for detection and MO images with an absolute angle of the light polarization are acquired by the rotating analyzer method. By optimizing the analysis procedure with a least square method and the help of graphical processor units, this novel system significantly improves the speed for MO imaging, allowing to obtain a MO map of a sample within 15 s. To demonstrate the strength of the technique, we applied the method in a pump-and-probe experiment of all-optical switching in a GdFeCo sample in which we were able to detect temporal evolution of the MO images with sub-picosecond resolution.
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102
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Itoh A, Yamaguchi T, Nobuta T, Tada N, Miura T, Nakayama T, Uno B. Aerobic Photooxidative Carbon–Carbon Bond Formation Between Tertiary Amines and Carbon Nucleophiles Using 2-Chloroanthra-9,10-quinone. Synlett 2014. [DOI: 10.1055/s-0033-1341257] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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103
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Xu W, Silvestry S, Bierhals A, Itoh A, Novak E, Joseph S. Sarcopenia Is Associated with Increased Post Left Ventricular Assist Device Implantation Morbidity. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.911] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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104
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Andruska A, Nassif M, Novak E, Ewald G, LaRue S, Silvestry S, Itoh A. LVAD Exchange for Thrombosis Is Associated with Higher Recurrent Rates of Hemolysis, Thrombosis, and Death. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.353] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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105
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Raymer D, Vader J, Nassif M, Sparrow C, LaRue S, Ewald G, Itoh A, Silvestry S. Increased BMI Is Associated with Left Ventricular Assist Device-related Infectious Complications. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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106
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Silvestry S, Itoh A, Kazui T, Prasad S. The Impact of LVAD Program Volume and Transplant Status on Cost, Quality, and Survival in in the UHC Database 2010-2012. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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107
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Robertson J, Meyers S, Kirklin J, Mertz G, Prasad S, Itoh A, Silvestry S. Concomitant Aortic Valve Procedures in Patients Undergoing Implantation of Continuous-Flow LVADs: An INTERMACS Database Analysis. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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108
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Tibrewala A, Nassif M, Andruska A, Vader J, Novak E, Shuster J, Jackups R, LaRue S, Ewald G, Itoh A. Use of ADP Receptor Inhibitor Prior to LVAD Implantation Does Not Increase Risk of Bleeding. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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109
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Itoh A, Fujiya A, Kariya A, Nobuta T, Tada N, Miura T. Photooxidative Cleavage of Aromatic Alkenes into Aldehydes Using Catalytic Iodine and Molecular Oxygen under Visible Light Irradiation. Synlett 2014. [DOI: 10.1055/s-0033-1340735] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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110
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Kariya A, Yamaguchi T, Nobuta T, Tada N, Miura T, Itoh A. Molecular-iodine-catalyzed aerobic oxidative synthesis of β-hydroxy sulfones from alkenes. RSC Adv 2014. [DOI: 10.1039/c3ra47863g] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The synthesis of β-hydroxy sulfones from alkenes and sodium sulfinates under aerobic oxidative conditions was achieved in the presence of a catalytic amount of molecular iodine.
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111
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Kamito Y, Masuda A, Yuasa H, Tada N, Itoh A, Koseki Y, Miura T. Asymmetric Conjugate Addition of Malonates to Enones Using Perfluorobutanesulfonamide Organocatalyst. CHEM LETT 2013. [DOI: 10.1246/cl.130575] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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112
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Cui L, Matusaki Y, Tada N, Miura T, Uno B, Itoh A. Metal-Free Direct CH Perfluoroalkylation of Arenes and Heteroarenes Using a Photoredox Organocatalyst. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300199] [Citation(s) in RCA: 135] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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113
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Nakamura M, Ohmiya N, Hirooka Y, Miyahara R, Ando T, Watanabe O, Itoh A, Kawashima H, Ohno E, Kinoshita T, Goto H. Endoscopic diagnosis of follicular lymphoma with small-bowel involvement using video capsule endoscopy and double-balloon endoscopy: a case series. Endoscopy 2013. [PMID: 23208779 DOI: 10.1055/s-0032-1325867] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The aims of this study were to compare the detection rates of gastrointestinal follicular lymphoma lesions by video capsule endoscopy (VCE) and double-balloon endoscopy (DBE), and to determine the pathologic diagnostic yields of DBE-directed biopsies. A total of 27 consecutive patients were enrolled. No significant difference in detection rates was observed in 12 patients who underwent total enteroscopy at both VCE and DBE. Pathologic diagnostic yields stratified by location were 91 % in the proximal duodenum at esophagogastroduodenoscopy, 88 % in the jejunum at antegrade DBE, 52 % in the ileum at retrograde DBE, and 57 % in the terminal ileum at colonoscopy. VCE and DBE were helpful in determining treatment in 44 % of patients.
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114
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Ohmiya N, Nakamura M, Funasaka K, Miyahara R, Ohno E, Kawashima H, Itoh A, Hirooka Y, Toyota H, Goto H. Intestinal Phlebectasias Treated by Endoscopic Injection Sclerotherapy at Double-Balloon Endoscopy. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/s2212-0971(13)70105-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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115
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Itoh A, Shimada Y, Hattori K, Tada N, Miura T. Facile Aerobic Photooxidation of Alcohols Using 2-Chloroanthraquinone under Visible Light Irradiation. SYNTHESIS-STUTTGART 2013. [DOI: 10.1055/s-0033-1338420] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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116
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Imai M, Iriki Y, Itoh A. Target Dependence of Single-Electron-Capture Cross Sections for Slow Be, B, C, Fe, Ni, and W Ions Colliding with Atomic and Molecular Targets. FUSION SCIENCE AND TECHNOLOGY 2013. [DOI: 10.13182/fst13-a16447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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117
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Finazzi M, Savoini M, Khorsand AR, Tsukamoto A, Itoh A, Duò L, Kirilyuk A, Rasing T, Ezawa M. Laser-induced magnetic nanostructures with tunable topological properties. PHYSICAL REVIEW LETTERS 2013; 110:177205. [PMID: 23679767 DOI: 10.1103/physrevlett.110.177205] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Indexed: 05/23/2023]
Abstract
We report the creation and real-space observation of magnetic structures with well-defined topological properties and a lateral size as low as about 150 nm. They are generated in a thin ferrimagnetic film by ultrashort single optical laser pulses. Thanks to their topological properties, such structures can be classified as Skyrmions of a particular type that does not require an externally applied magnetic field for stabilization. Besides Skyrmions, we are able to generate magnetic features with topological characteristics that can be tuned by changing the laser fluence. The stability of such features is accounted for by an analytical model based on the interplay between the exchange and the magnetic dipole-dipole interactions.
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118
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Prasad S, Itoh A, Joseph S, Ewald G, Silvestry S. HeartMate II Explants Due to Hemolysis Show Acute on Chronic Laminar Fibrin Layering at Stators. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.896] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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119
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Itoh A, Prasad S, Joseph S, Ewald G, Silvestry S. Subcostal LVAD Exchange Is Associated with Shorter Recovery and Improved Long Term Survival Than Full Sternotomy Approach. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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120
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Okada S, Robertson J, Itoh A, Prasad S, Ewald G, Joseph S, Moon M, Damiano R, Silvestry S. Predictive Value of Pulmonary Vascular Remodeling Indices after LVAD Implantation. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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121
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Khorsand AR, Savoini M, Kirilyuk A, Kimel AV, Tsukamoto A, Itoh A, Rasing T. Element-specific probing of ultrafast spin dynamics in multisublattice magnets with visible light. PHYSICAL REVIEW LETTERS 2013; 110:107205. [PMID: 23521292 DOI: 10.1103/physrevlett.110.107205] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Indexed: 05/22/2023]
Abstract
We demonstrate the feasibility of element-specific probing of ultrafast spin dynamics in the multisublattice magnet TbFe in the visible spectral range. In particular, we show that one can selectively study the dynamics of Tb and Fe sublattices choosing the wavelength of light below and above 610 nm, respectively. We observe that, despite their antiferromagnetic coupling in the ground state, the Tb and Fe spins temporarily align ferromagnetically after excitation with an intense 55-fs laser pulse, after which they relax to their initial states due to the strong anisotropy in Tb.
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122
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Itoh A, Yamaguchi T, Nobuta T, Kudo Y, Hirashima SI, Tada N, Miura T. Catalytic Aerobic Photooxidative Cleavage of Carbon-Carbon Triple Bonds Using Carbon Tetrabromide. Synlett 2013. [DOI: 10.1055/s-0032-1318308] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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123
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Nobuta T, Tada N, Fujiya A, Kariya A, Miura T, Itoh A. Molecular Iodine Catalyzed Cross-Dehydrogenative Coupling Reaction between Two sp3 C–H Bonds Using Hydrogen Peroxide. Org Lett 2013; 15:574-7. [DOI: 10.1021/ol303389t] [Citation(s) in RCA: 145] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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124
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Cui L, Furuhashi S, Tachikawa Y, Tada N, Miura T, Itoh A. Efficient generation of hydrogen peroxide by aerobic photooxidation of 2-propanol using anthraquinone-2-carboxylic acid and one-pot epoxidation of α,β-unsaturated ketones. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.10.119] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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125
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Tada N, Ishigami T, Cui L, Ban K, Miura T, Itoh A. Calcium iodide catalyzed photooxidative oxylactonization of oxocarboxylic acids using molecular oxygen as terminal oxidant. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.11.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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