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Tsuda S, Saito K. CRYSTAL CONFIGURATION DEPENDENCE OF CSI(TL) SCINTILLATION DETECTORS ON ENVIRONMENTAL DOSE RATE MEASUREMENT. Radiat Prot Dosimetry 2022; 198:1283-1291. [PMID: 35876638 DOI: 10.1093/rpd/ncac157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 06/02/2022] [Accepted: 06/19/2022] [Indexed: 06/15/2023]
Abstract
The crystal configuration dependence of thallium-doped caesium iodide (CsI(Tl)) scintillation detectors was analysed on an ambient dose equivalent (H*(10)). H*(10) were systematically calculated in various crystal conditions for aspect ratios and sizes in a virtual environment contaminated by radionuclides to investigate directional characteristics by comparing the H*(10)s with the typical irradiation geometries in anterior-posterior (AP), lateral (LAT), rotational (ROT) and isotropic (ISO). The simulation revealed that H*(10) obviously changes according to the crystal configuration and cuboidal CsI(Tl) scintillation detectors with specific aspect ratios could be applied to environmental dose rate measurement without further changes in the calibration procedure.
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Affiliation(s)
- S Tsuda
- Research Group of Radiation Transport Analysis, Japan Atomic Energy Agency, 2-4, Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - K Saito
- Nuclear Emergency Assistance & Training Center, Japan Atomic Energy Agency, Chiba 227-0871, Japan
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2
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Abstract
Robust immunity to intracellular infections is mediated by antigen-specific naive CD8 T cells that become activated and differentiate into phenotypically and functionally diverse subsets of effector cells, some of which terminally differentiate and others that give rise to memory cells that provide long-lived protection. This developmental system is an outstanding model with which to elucidate how regulation of chromatin structure and transcriptional control establish gene expression programs that govern cell fate determination, insights from which are likely to be useful for informing the design of immunotherapeutic approaches to engineer durable immunity to infections and tumors. A unifying framework that describes how naive CD8 T cells develop into memory cells is still outstanding. We propose a model that incorporates a common early linear path followed by divergent paths that slowly lose capacity to interconvert and discuss classical and contemporary observations that support these notions, focusing on insights from transcriptional control and chromatin regulation.
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Affiliation(s)
- Shanel Tsuda
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, Florida 33458, USA
| | - Matthew E Pipkin
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, Florida 33458, USA
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3
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Naniwa S, Yamada S, Awano K, Yoshida A, Takami K, Tagashira T, Tsuda S, Terashita D, Takada H, Akita T, Takata K, Kunigita T, Nishijo K. Impact of wall shear stress affected by anatomical difference between acute and chronic coronary syndrome in patients with LAD proximal disease. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Recent hemodynamic studies have demonstrated that progression of coronary atherosclerosis occurs at low wall share-stress site, whereas plaque rupture frequently occurs at high share stress site. It is well recognized that wall shear stress is relatively low along the outer walls of the bifurcation.
We investigated consecutive 140 patients (77 with acute coronary syndrome (ACS) and 63 with chronic coronary syndrome (CCS) performed PCI for LAD proximal lesions (AHA seg.6) from January 2016 to December 2019. In CCS group, entry criteria included stenosis of at least 90% in the LAD proximal lesion or at least 70% in the LAD proximal lesion and objective evidence of myocardial ischemia (inducible ischemia with either exercise or pharmacologic vasodilator stress or with pressure wire). Exclusion criteria were patients with maintenance dialysis, chronic total occlusion lesions, in-stent restenosis, and clinically diagnosed unstable angina without troponin I elevation. We measured the distance from LMT distal carina to the culprit site (Distance) and plaque location (Location) with intravascular ultrasound and angle between LMT and LAD with cardiovascular angiography analysis system (CAAS) (Angle).
The two groups were generally well balanced with regard to baseline clinical characteristics. The mean (±SD) age of the patients was 69.0±11.8 years, and 75% were men. Medication at baseline was also similar between two groups except higher prevalence of statin prescription in CCS group. The Distance was shorter and Angle was steeper in CCS group than in ACS group. The number of patients with Angle less than 150 degrees and with Location in the lateral wall side was much more in CCS group.
In this study, plaques in CCS were frequently observed at low shear stress site, whereas those in ACS at high shear stress site. Plaque progression in CCS may be associated with low wall shear stress, and high shear stress may play key role in plaque rupture in ACS. This anatomical difference can partly explain the different mechanisms of onset between of ACS and CCS.
Funding Acknowledgement
Type of funding sources: None. Anatomical differenceCharacteristics and results
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Affiliation(s)
- S Naniwa
- Kita-Harima Medical Centre, Ono, Japan
| | - S Yamada
- Kita-Harima Medical Centre, Ono, Japan
| | - K Awano
- Kita-Harima Medical Centre, Ono, Japan
| | - A Yoshida
- Kita-Harima Medical Centre, Ono, Japan
| | - K Takami
- Kita-Harima Medical Centre, Ono, Japan
| | | | - S Tsuda
- Kita-Harima Medical Centre, Ono, Japan
| | | | - H Takada
- Kita-Harima Medical Centre, Ono, Japan
| | - T Akita
- Kita-Harima Medical Centre, Ono, Japan
| | - K Takata
- Kita-Harima Medical Centre, Ono, Japan
| | | | - K Nishijo
- Kita-Harima Medical Centre, Ono, Japan
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4
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Shimura Y, Wörl A, Sundermann M, Tsuda S, Adroja DT, Bhattacharyya A, Strydom AM, Hillier AD, Pratt FL, Gloskovskii A, Severing A, Onimaru T, Gegenwart P, Takabatake T. Antiferromagnetic Correlations in Strongly Valence Fluctuating CeIrSn. Phys Rev Lett 2021; 126:217202. [PMID: 34114835 DOI: 10.1103/physrevlett.126.217202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 04/29/2021] [Indexed: 06/12/2023]
Abstract
CeIrSn with a quasikagome Ce lattice in the hexagonal basal plane is a strongly valence fluctuating compound, as we confirm by hard x-ray photoelectron spectroscopy and inelastic neutron scattering, with a high Kondo temperature of T_{K}∼480 K. We report a negative in-plane thermal expansion α/T below 2 K, which passes through a broad minimum near 0.75 K. Volume and a-axis magnetostriction for B∥a are markedly negative at low fields and change sign before a sharp metamagnetic anomaly at 6 T. These behaviors are unexpected for Ce-based intermediate valence systems, which should feature positive expansivity. Rather they point towards antiferromagnetic correlations at very low temperatures. This is supported by muon spin relaxation measurements down to 0.1 K, which provide microscopic evidence for a broad distribution of internal magnetic fields. Comparison with isostructural CeRhSn suggests that these antiferromagnetic correlations emerging at T≪T_{K} result from geometrical frustration.
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Affiliation(s)
- Y Shimura
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
| | - A Wörl
- Experimental Physics VI, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
| | - M Sundermann
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
| | - S Tsuda
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
| | - D T Adroja
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot Oxon OX11 0QX, United Kingdom
- Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa
| | - A Bhattacharyya
- Department of Physics, Ramakrishna Mission Vivekananda Educational and Research Institute, Belur Math, Howrah 711202, West Bengal, India
| | - A M Strydom
- Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa
| | - A D Hillier
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot Oxon OX11 0QX, United Kingdom
| | - F L Pratt
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot Oxon OX11 0QX, United Kingdom
| | - A Gloskovskii
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
| | - A Severing
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
- Institute of Physics II, University of Cologne, 50937 Cologne, Germany
| | - T Onimaru
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
| | - P Gegenwart
- Experimental Physics VI, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
| | - T Takabatake
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
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5
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Tsuda S, Tanigaki M, Yoshida T, Okumura R, Saito K. ANALYSES OF H*(10) DOSE RATES MEASURED IN ENVIRONMENT CONTAMINATED BY RADIOACTIVE CAESIUM: CORRECTION OF DIRECTIONAL DEPENDENCE OF SCINTILLATION DETECTORS. Radiat Prot Dosimetry 2021; 193:228-236. [PMID: 33893735 DOI: 10.1093/rpd/ncab060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/08/2021] [Accepted: 04/01/2021] [Indexed: 06/12/2023]
Abstract
Ambient dose equivalent rates were measured in the environment of the Fukushima prefecture using NaI(Tl)/CsI(Tl) scintillation detectors and CdZnTe/Ge semiconductor detectors. The dose rates obtained at the same locations varied beyond uncertainty (1σ). By replacing the spectrum-dose conversion operators obtained from the anterior-posterior geometry with those from the rotational geometry, the dose rates agreed with each other within uncertainties, except for a CsI(Tl) scintillation detector with a considerably flat crystal configuration, due to its excessive directional dependence.
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Affiliation(s)
- S Tsuda
- Research group for radiation transport analysis, Japan Atomic Energy Agency, 2-4, Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - M Tanigaki
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2, Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
| | - T Yoshida
- Emergency Administration Section, Japan Atomic Energy Agency, 765-1 Funaishikawa, Tokai-mura, Naka-gun, Ibaraki 319-1184, Japan
| | - R Okumura
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2, Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
| | - K Saito
- Sector of Nuclear Safety Research and Emergency Preparedness, Japan Atomic Energy Agency, 148-4 Kashiwanoha Campus,178-4 Wakashiba, Kashiwa-city, Chiba, 277-0871, Japan
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6
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Getzler A, Frederick MA, Diao H, Milner J, Belanger S, Tsuda S, Kim J, Crotty S, Goldrath AW, Pipkin ME. MLL1-COMPASS establishes developmental patterning of the memory CD8 T cell compartment and ensures regenerative immunity. The Journal of Immunology 2021. [DOI: 10.4049/jimmunol.206.supp.14.08] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Abstract
CD8+ T cells with stem cell-like qualities (TSTEM) provide central memory following resolved intracellular infections, and serve as progenitor cells that sustain effector-like cell development during chronic infections and tumors, both naturally and in response to immunotherapeutic PD-1 blockade. However, the chromatin regulatory factors (CRFs) and transcriptional programs that establish TSTEM cell differentiation are unclear. Using an RNA interference screen of all CRFs we discovered that Mixed Lineage Leukemia 1 (MLL1) was required in activated CD8 T cells to promote Id3-GFP reporter expression and to coordinately restrain PD-1, LAG3 and TIM3 expression. Single cell RNA-seq analysis demonstrated Kmt2a (MLL1) was preferentially expressed in P14 CD8 T cells enriched with TSTEM gene expression during lymphocytic choriomeningitis virus (LCMV) infection. P14 CD8 T cells depleted of MLL1 failed to establish TSTEM-like cells, terminally differentiated prematurely, failed to sustain responses to chronic LCMV infection and tumors, and failed to develop central memory subsets during acute LCMV infection. MLL1 preferentially bound transcriptional start sites (TSSs) in CD8 T cells, and was essential for global accumulation of H3K4me3, H4K16ac, and RNA Polymerase II CTD-phosphorylation during TCR stimulation. These results suggest that MLL1-COMPASS organizes TSS activity to establish transcriptional programs that delineate TSTEM and terminal differentiation.
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Affiliation(s)
| | | | | | - Justin Milner
- 2Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC
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Chen ML, Sun A, Cao W, Eliason A, Mendez KM, Getzler AJ, Tsuda S, Diao H, Mukori C, Bruno NE, Kim SY, Pipkin ME, Koralov SB, Sundrud MS. Physiological expression and function of the MDR1 transporter in cytotoxic T lymphocytes. J Exp Med 2020; 217:151682. [PMID: 32302378 PMCID: PMC7201929 DOI: 10.1084/jem.20191388] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 12/21/2019] [Accepted: 02/04/2020] [Indexed: 12/19/2022] Open
Abstract
Multidrug resistance-1 (MDR1) acts as a chemotherapeutic drug efflux pump in tumor cells, although its physiological functions remain enigmatic. Using a recently developed MDR1-knockin reporter allele (Abcb1aAME), we found that constitutive MDR1 expression among hematopoietic cells was observed in cytolytic lymphocytes—including CD8+ cytotoxic T lymphocytes (CTLs) and natural killer cells—and regulated by Runt-related (Runx) transcription factors. Whereas MDR1 was dispensable for naive CD8+ T cell development, it was required for both the normal accumulation of effector CTLs following acute viral infection and the protective function of memory CTLs following challenge with an intracellular bacterium. MDR1 acted early after naive CD8+ T cell activation to suppress oxidative stress, enforce survival, and safeguard mitochondrial function in nascent CTLs. These data highlight an important endogenous function of MDR1 in cell-mediated immune responses and suggest that ongoing efforts to intentionally inhibit MDR1 in cancer patients could be counterproductive.
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Affiliation(s)
- Mei Lan Chen
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
| | - Amy Sun
- Department of Pathology, New York University Medical Center, New York, NY
| | - Wei Cao
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
| | - Amber Eliason
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
| | - Kayla M Mendez
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
| | - Adam J Getzler
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
| | - Shanel Tsuda
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
| | - Huitian Diao
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
| | - Clever Mukori
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
| | - Nelson E Bruno
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter, FL
| | - Sang Yong Kim
- Rodent Genetic Engineering Core, New York University Medical Center, New York, NY
| | - Matthew E Pipkin
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
| | - Sergei B Koralov
- Department of Pathology, New York University Medical Center, New York, NY
| | - Mark S Sundrud
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
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Nagashima H, Tsuda S, Tokumasu T. An evaluation of the self-diffusion coefficient of liquid hydrogen via the generic van der Waals equation of state and modified free volume theory. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2020.110952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Mediouni S, Jablonski JA, Tsuda S, Richard A, Kessing C, Andrade MV, Biswas A, Even Y, Tellinghuisen T, Choe H, Cameron M, Stevenson M, Valente ST. Potent suppression of HIV-1 cell attachment by Kudzu root extract. Retrovirology 2018; 15:64. [PMID: 30236131 PMCID: PMC6149077 DOI: 10.1186/s12977-018-0446-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 09/10/2018] [Indexed: 01/02/2023] Open
Abstract
There is a constant need to improve antiretrovirals against HIV since therapy is limited by cost, side effects and the emergence of drug resistance. Kudzu is a climbing vine from which the root extract (Pueraria lobata), rich in isoflavones and saponins, has long been used in traditional Chinese medicine for a variety of purposes, from weight loss to alcoholism prevention. Here we show that Kudzu root extract significantly inhibits HIV-1 entry into cell lines, primary human CD4+T lymphocytes and macrophages, without cell-associated toxicity. Specifically, Kudzu inhibits the initial attachment of the viral particle to the cell surface, a mechanism that depends on the envelope glycoprotein gp120 but is independent from the HIV-1 cell receptor CD4 and co-receptors CXCR4/CCR5. This activity seems selective to lentiviruses since Kudzu inhibits HIV-2 and simian immunodeficiency virus, but does not interfere with Hepatitis C, Influenza, Zika Brazil and adenovirus infection. Importantly, depending on the dose, Kudzu can act synergistically or additively with the current antiretroviral cocktails against HIV-1 and can block viruses resistant to the fusion inhibitor Enfuvirtide. Together our results highlight Kudzu's root extract value as a supplement to current antiretroviral therapy against HIV.
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Affiliation(s)
- S Mediouni
- Department of Immunology and Microbiology, The Scripps Research Institute, 130 Scripps Way, 3C1, Jupiter, FL, 33458, USA
| | - J A Jablonski
- Department of Immunology and Microbiology, The Scripps Research Institute, 130 Scripps Way, 3C1, Jupiter, FL, 33458, USA
| | - S Tsuda
- Department of Immunology and Microbiology, The Scripps Research Institute, 130 Scripps Way, 3C1, Jupiter, FL, 33458, USA
| | - A Richard
- Department of Immunology and Microbiology, The Scripps Research Institute, 130 Scripps Way, 3C1, Jupiter, FL, 33458, USA
| | - C Kessing
- Department of Immunology and Microbiology, The Scripps Research Institute, 130 Scripps Way, 3C1, Jupiter, FL, 33458, USA
| | - M V Andrade
- University of Miami Miller School of Medicine, Miami, FL, USA
| | - A Biswas
- Department of Immunology and Microbiology, The Scripps Research Institute, 130 Scripps Way, 3C1, Jupiter, FL, 33458, USA
| | - Y Even
- The Botanist's Beach Farm, Jupiter, FL, USA
| | - T Tellinghuisen
- Department of Immunology and Microbiology, The Scripps Research Institute, 130 Scripps Way, 3C1, Jupiter, FL, 33458, USA.,Roche, Basel, Switzerland
| | - H Choe
- Department of Immunology and Microbiology, The Scripps Research Institute, 130 Scripps Way, 3C1, Jupiter, FL, 33458, USA
| | - M Cameron
- Department of Molecular Therapeutics, The Scripps Research Institute, Jupiter, FL, USA
| | - M Stevenson
- University of Miami Miller School of Medicine, Miami, FL, USA
| | - S T Valente
- Department of Immunology and Microbiology, The Scripps Research Institute, 130 Scripps Way, 3C1, Jupiter, FL, 33458, USA.
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10
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Mikami T, Ito K, Diaz-Tartera HO, Hellström PM, Mochiki E, Takemi S, Tanaka T, Tsuda S, Jogahara T, Sakata I, Sakai T. Study of termination of postprandial gastric contractions in humans, dogs and Suncus murinus: role of motilin- and ghrelin-induced strong contraction. Acta Physiol (Oxf) 2018; 222. [PMID: 28786555 DOI: 10.1111/apha.12933] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 06/07/2017] [Accepted: 08/01/2017] [Indexed: 12/16/2022]
Abstract
AIM Stomach contractions show two types of specific patterns in many species, that is migrating motor contraction (MMC) and postprandial contractions (PPCs), in the fasting and fed states respectively. We found gastric PPCs terminated with migrating strong contractions in humans, dogs and suncus. In this study, we reveal the detailed characteristics and physiological implications of these strong contractions of PPC. METHODS Human, suncus and canine gastric contractions were recorded with a motility-monitoring ingestible capsule and a strain-gauge force transducer. The response of motilin and ghrelin and its receptor antagonist on the contractions were studied by using free-moving suncus. RESULTS Strong gastric contractions were observed at the end of a PPC in human, dog and suncus models, and we tentatively designated this contraction to be a postprandial giant contraction (PPGC). In the suncus, the PPGC showed the same property as those of a phase III contraction of MMC (PIII-MMC) in the duration, motility index and response to motilin or ghrelin antagonist administration. Ghrelin antagonist administration in the latter half of the PPC (LH-PPC) attenuated gastric contraction prolonged the duration of occurrence of PPGC, as found in PII-MMC. CONCLUSION It is thought that the first half of the PPC changed to PII-MMC and then terminated with PIII-MMC, suggesting that PPC consists of a digestive phase (the first half of the PPC) and a discharge phase (LH-PPC) and that LH-PPC is coincident with MMC. In this study, we propose a new approach for the understanding of postprandial contractions.
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Affiliation(s)
- T. Mikami
- Area of Regulatory Biology; Division of Life Science; Graduate School of Science and Engineering; Saitama University; Saitama Japan
| | - K. Ito
- Area of Regulatory Biology; Division of Life Science; Graduate School of Science and Engineering; Saitama University; Saitama Japan
| | | | - P. M. Hellström
- Department of Medical Sciences; Uppsala University; Uppsala Sweden
| | - E. Mochiki
- Department of Digestive Tract and General Surgery; Saitama Medical Center; Saitama Medical University; Kawagoe Japan
| | - S. Takemi
- Area of Regulatory Biology; Division of Life Science; Graduate School of Science and Engineering; Saitama University; Saitama Japan
| | - T. Tanaka
- Department of Pharmaceutical and Health Sciences; Faculty of Pharmaceutical Sciences; Josai University; Saitama Japan
| | - S. Tsuda
- Area of Regulatory Biology; Division of Life Science; Graduate School of Science and Engineering; Saitama University; Saitama Japan
| | - T. Jogahara
- Laboratory of Animal Management and Resources; Department of Zoology; Faculty of Science; Okayama University of Science; Okayama Japan
| | - I. Sakata
- Area of Regulatory Biology; Division of Life Science; Graduate School of Science and Engineering; Saitama University; Saitama Japan
| | - T. Sakai
- Area of Life-NanoBio; Division of Strategy Research, Graduate School of Science and Engineering; Saitama University; Saitama Japan
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11
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Nagashima H, Tsuda S, Tsuboi N, Hayashi AK, Tokumasu T. A molecular dynamics study of nuclear quantum effect on diffusivity of hydrogen molecule. J Chem Phys 2017; 147:024501. [PMID: 28711051 DOI: 10.1063/1.4991732] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this paper, the nuclear quantum effect of the hydrogen molecule on its diffusivity was analyzed using the molecular dynamics (MD) method. The centroid MD (CMD) method was applied to reproduce the time evolution of the molecules. The diffusion coefficient of hydrogen was calculated using the Green-Kubo method over a wide temperature region, and the temperature dependence of the quantum effect of the hydrogen molecule on its diffusivity was addressed. The calculated results were compared with classical MD results based on the principle of corresponding state (PCS). It was confirmed that the difference in the diffusion coefficient calculated in the CMD and classical MD methods was small, and the PCS appears to be satisfied on the temperature dependence of the diffusion coefficient, even though the quantum effect of the hydrogen molecules was taken into account. It was clarified that this result did not suggest that the quantum effect on the diffusivity of the hydrogen molecule was small but that the two changes in the intermolecular interaction of hydrogen due to the quantum effect offset each other. Moreover, it was found that this tendency was related to the temperature dependence of the ratio of the kinetic energy of the quantum fluctuational motion to the classical kinetic energy.
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Affiliation(s)
- H Nagashima
- Department of Mechanical Systems Engineering, University of the Ryukuys, Okinawa, Senbaru, Nishihara-cho, Okinawa 903-0213, Japan
| | - S Tsuda
- Department of Mechanical Engineering, Kyushu University, Fukuoka 819-0395, Japan
| | - N Tsuboi
- Department of Mechanical and Control Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
| | - A K Hayashi
- Department of Mechanical Engineering, Aoyama Gakuin University, Sagamihara 229-8558, Japan
| | - T Tokumasu
- Institute of Fluid Science, Tohoku University, Sendai 980-8577, Japan
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12
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Orlova DY, Zimmerman N, Meehan S, Meehan C, Waters J, Ghosn EEB, Filatenkov A, Kolyagin GA, Gernez Y, Tsuda S, Moore W, Moss RB, Herzenberg LA, Walther G. Earth Mover's Distance (EMD): A True Metric for Comparing Biomarker Expression Levels in Cell Populations. PLoS One 2016; 11:e0151859. [PMID: 27008164 PMCID: PMC4805242 DOI: 10.1371/journal.pone.0151859] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 03/04/2016] [Indexed: 01/26/2023] Open
Abstract
Changes in the frequencies of cell subsets that (co)express characteristic biomarkers, or levels of the biomarkers on the subsets, are widely used as indices of drug response, disease prognosis, stem cell reconstitution, etc. However, although the currently available computational “gating” tools accurately reveal subset frequencies and marker expression levels, they fail to enable statistically reliable judgements as to whether these frequencies and expression levels differ significantly between/among subject groups. Here we introduce flow cytometry data analysis pipeline which includes the Earth Mover’s Distance (EMD) metric as solution to this problem. Well known as an informative quantitative measure of differences between distributions, we present three exemplary studies showing that EMD 1) reveals clinically-relevant shifts in two markers on blood basophils responding to an offending allergen; 2) shows that ablative tumor radiation induces significant changes in the murine colon cancer tumor microenvironment; and, 3) ranks immunological differences in mouse peritoneal cavity cells harvested from three genetically distinct mouse strains.
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Affiliation(s)
- Darya Y. Orlova
- Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America
- * E-mail: ; (DYO); (GW)
| | - Noah Zimmerman
- Department of Statistics, Stanford University, Stanford, California, United States of America
| | - Stephen Meehan
- Department of Statistics, Stanford University, Stanford, California, United States of America
| | - Connor Meehan
- Department of Mathematics, California Institute of Technology, Pasadena, California, United States of America
| | - Jeffrey Waters
- Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America
| | - Eliver E. B. Ghosn
- Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America
| | - Alexander Filatenkov
- Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, California, United States of America
| | - Gleb A. Kolyagin
- Independent Researcher, Menlo Park, California, United States of America
| | - Yael Gernez
- Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America
- Department of Allergy and Immunology, Mount Sinai Hospital, New York, New York, United States of America
| | - Shanel Tsuda
- Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America
| | - Wayne Moore
- Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America
| | - Richard B. Moss
- Center for Excellence in Pulmonary Biology, Stanford University School of Medicine, Stanford, California, United States of America
| | - Leonore A. Herzenberg
- Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America
| | - Guenther Walther
- Department of Statistics, Stanford University, Stanford, California, United States of America
- * E-mail: ; (DYO); (GW)
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13
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Tsuda S, Sato T, Ogawa T. Measurement of the stochastic radial dose distribution for a 30-MeV proton beam using a wall-less tissue-equivalent proportional counter. Radiat Prot Dosimetry 2016; 168:190-196. [PMID: 25956785 PMCID: PMC4884884 DOI: 10.1093/rpd/ncv285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Revised: 02/26/2015] [Accepted: 03/13/2015] [Indexed: 06/04/2023]
Abstract
The frequency distribution of the lineal energy, y, of a 30-MeV proton beam was measured as a function of the radial distance from the beam path, and the dosed mean of y, y¯(D), was obtained to investigate the radial dependence of y¯(D). A wall-less tissue-equivalent proportional counter, in a cylindrical volume with simulated diameters of 0.36, 0.72 and 1.44 µm was used for the measurement of y distributions, yf(y). The measured values of yf(y) summed in the radial direction agreed fairly well with the corresponding data taken from the microdosimetric calculations using the PHITS code. The y¯(D) value of the 30-MeV proton beam presented its smallest value at r = 0.0 and gradually increased with radial distance, and the y¯(D) values of heavy ions such as iron showed rapid decrease with radial distance. This experimental result demonstrated that the stochastic deposited energy distribution of high-energy protons in the microscopic region is rather constant in the core as well as in the penumbra region of the track structure.
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Affiliation(s)
- S Tsuda
- Research Group for Radiation Protection, Japan Atomic Energy Agency, 2-4, Shirakata-shirane, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - T Sato
- Research Group for Radiation Protection, Japan Atomic Energy Agency, 2-4, Shirakata-shirane, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - T Ogawa
- Research Group for Radiation Protection, Japan Atomic Energy Agency, 2-4, Shirakata-shirane, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
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14
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Taguchi M, Chainani A, Ueda S, Matsunami M, Ishida Y, Eguchi R, Tsuda S, Takata Y, Yabashi M, Tamasaku K, Nishino Y, Ishikawa T, Daimon H, Todo S, Tanaka H, Oura M, Senba Y, Ohashi H, Shin S. Temperature Dependence of Magnetically Active Charge Excitations in Magnetite across the Verwey Transition. Phys Rev Lett 2015; 115:256405. [PMID: 26722935 DOI: 10.1103/physrevlett.115.256405] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Indexed: 05/12/2023]
Abstract
We study the electronic structure of bulk single crystals and epitaxial films of Fe_{3}O_{4}. Fe 2p core level spectra show clear differences between hard x-ray (HAX) and soft x-ray photoemission spectroscopy (PES). The bulk-sensitive spectra exhibit temperature (T) dependence across the Verwey transition, which is missing in the surface-sensitive spectra. By using an extended impurity Anderson full-multiplet model-and in contrast to an earlier peak assignment-we show that the two distinct Fe species (A and B site) and the charge modulation at the B site are responsible for the newly found double peaks in the main peak above T_{V} and its T-dependent evolution. The Fe 2p HAXPES spectra show a clear magnetic circular dichroism (MCD) in the metallic phase of magnetized 100-nm-thick films. The model calculations also reproduce the MCD and identify the contributions from magnetically distinct A and B sites. Valence band HAXPES shows a finite density of states at E_{F} for the polaronic half metal with a remnant order above T_{V} and a clear gap formation below T_{V}. The results indicate that the Verwey transition is driven by changes in the strongly correlated and magnetically active B-site electronic states, consistent with resistivity and optical spectra.
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Affiliation(s)
- M Taguchi
- Material Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - A Chainani
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - S Ueda
- National Institute for Materials Science (NIMS), SPring-8, Sayo, Hyogo 679-5148, Japan
| | - M Matsunami
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Y Ishida
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - R Eguchi
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - S Tsuda
- National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0003, Japan
| | - Y Takata
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - M Yabashi
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - K Tamasaku
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - Y Nishino
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - T Ishikawa
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - H Daimon
- Material Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan
| | - S Todo
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - H Tanaka
- ISIR-Sanken, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - M Oura
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - Y Senba
- JASRI/SPring-8, Sayo, Sayo, Hyogo 679-5198, Japan
| | - H Ohashi
- JASRI/SPring-8, Sayo, Sayo, Hyogo 679-5198, Japan
| | - S Shin
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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15
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Tsuda S, Yoshida T, Tsutsumi M, Saito K. Characteristics and verification of a car-borne survey system for dose rates in air: KURAMA-II. J Environ Radioact 2015; 139:260-265. [PMID: 24698118 DOI: 10.1016/j.jenvrad.2014.02.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 02/25/2014] [Accepted: 02/27/2014] [Indexed: 06/03/2023]
Abstract
The car-borne survey system KURAMA-II, developed by the Kyoto University Research Reactor Institute, has been used for air dose rate mapping after the Fukushima Dai-ichi Nuclear Power Plant accident. KURAMA-II consists of a CsI(Tl) scintillation detector, a GPS device, and a control device for data processing. The dose rates monitored by KURAMA-II are based on the G(E) function (spectrum-dose conversion operator), which can precisely calculate dose rates from measured pulse-height distribution even if the energy spectrum changes significantly. The characteristics of KURAMA-II have been investigated with particular consideration to the reliability of the calculated G(E) function, dose rate dependence, statistical fluctuation, angular dependence, and energy dependence. The results indicate that 100 units of KURAMA-II systems have acceptable quality for mass monitoring of dose rates in the environment.
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Affiliation(s)
- S Tsuda
- Fukushima Environmental Safety Center, Headquarters of Fukushima Partnership Operations, Japan Atomic Energy Agency, Tokyo 100-8577, Japan.
| | - T Yoshida
- Fukushima Environmental Safety Center, Headquarters of Fukushima Partnership Operations, Japan Atomic Energy Agency, Tokyo 100-8577, Japan
| | - M Tsutsumi
- Calibration Standards and Measurement Section, Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
| | - K Saito
- Fukushima Environmental Safety Center, Headquarters of Fukushima Partnership Operations, Japan Atomic Energy Agency, Tokyo 100-8577, Japan
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16
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Furui H, Nagashima Y, Takase Y, Ejiri A, Kakuda H, Sonehara M, Oosako T, Tsujii N, Hiratsuka J, Imamura K, Inada T, Nakamura K, Nakanishi A, Shinya T, Togashi H, Tsuda S, Wakatsuki T, Yamaguchi T. Local current density measurement using a Rogowski probe in Tokyo Spherical Tokamak-2. Rev Sci Instrum 2014; 85:11D813. [PMID: 25430226 DOI: 10.1063/1.4887277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A Rogowski probe consisting of a small multi-layer Rogowski coil, five magnetic pick-up coils, and a Langmuir probe was developed to measure the local current density and its direction. It can be moved along the major radius and can be turned around its axis. This probe was used to measure the current density profile near the last closed flux surface of Ohmic plasmas in Tokyo Spherical Tokamak-2. The current density profile was measured successfully with a signal to noise ratio of greater than 20.
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Affiliation(s)
- H Furui
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Y Nagashima
- Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8680, Japan
| | - Y Takase
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - A Ejiri
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - H Kakuda
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - M Sonehara
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - T Oosako
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - N Tsujii
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - J Hiratsuka
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - K Imamura
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - T Inada
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - K Nakamura
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - A Nakanishi
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - T Shinya
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - H Togashi
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - S Tsuda
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - T Wakatsuki
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - T Yamaguchi
- The University of Tokyo, 5-1-5 Kasshiwanoha, Kashiwa, Chiba 277-8561, Japan
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Togashi H, Ejiri A, Hiratsuka J, Nakamura K, Takase Y, Yamaguchi T, Furui H, Imamura K, Inada T, Kakuda H, Nakanishi A, Oosako T, Shinya T, Sonehara M, Tsuda S, Tsujii N, Wakatsuki T, Hasegawa M, Nagashima Y, Narihara K, Yamada I, Tojo H. Demonstration of improvement in the signal-to-noise ratio of Thomson scattering signal obtained by using a multi-pass optical cavity on the Tokyo Spherical Tokamak-2. Rev Sci Instrum 2014; 85:11D846. [PMID: 25430259 DOI: 10.1063/1.4891707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The multi-pass Thomson scattering (TS) scheme enables obtaining many photons by accumulating multiple TS signals. The signal-to-noise ratio (SNR) depends on the accumulation number. In this study, we performed multi-pass TS measurements for ohmically heated plasmas, and the relationship between SNR and the accumulation number was investigated. As a result, improvement of SNR in this experiment indicated similar tendency to that calculated for the background noise dominant situation.
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Affiliation(s)
- H Togashi
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - A Ejiri
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - J Hiratsuka
- Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - K Nakamura
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - Y Takase
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Yamaguchi
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - H Furui
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - K Imamura
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Inada
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - H Kakuda
- Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - A Nakanishi
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Oosako
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Shinya
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - M Sonehara
- Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - S Tsuda
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - N Tsujii
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Wakatsuki
- Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - M Hasegawa
- Research Institute of Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - Y Nagashima
- Research Institute of Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - K Narihara
- Research Institute of Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
| | - I Yamada
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H Tojo
- Japan Atomic Energy Agency, Naka 311-0193, Japan
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18
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Kawahara D, Ozawa S, Nakashima T, Aita M, Tsuda S, Ochi Y, Okumura T, Masuda H, Ohno Y, Kimura T, Nagata Y. SU-E-J-140: Availability of Using Diaphragm Matching in Stereotactic Body Radiotherapy (SBRT) at the Time in Breath-Holding SBRT for Liver Cancer. Med Phys 2014. [DOI: 10.1118/1.4888193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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19
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Tomitaka Y, Usugi T, Kozuka R, Tsuda S. First Report of Mosaic Disease Caused by Colombian datura virus on Solanum lycopersicum Plants Commercially Cultivated in Japan. Plant Dis 2014; 98:698. [PMID: 30708510 DOI: 10.1094/pdis-06-13-0668-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In 2009, some commercially grown tomato (Solanum lycopersicum) plants in Chiba Prefecture, Japan, exhibited mosaic symptoms. Ten plants from a total of about 72,000 cultivated plants in the greenhouses showed such symptoms. To identify the causal agent, sap from leaves of the diseased plants was inoculated into Chenopodium quinoa and Nicotiana benthamiana plants. Local necrotic lesions appeared on inoculated leaves of C. quinoa, but no systemic infection was observed. Systemic mosaic symptoms were observed on the N. benthamiana plants inoculated. Single local lesion isolation was performed three times using C. quinoa to obtain a reference isolate for further characterization. N. benthamiana was used for propagation of the isolate. Sap from infected leaves of N. benthamiana was mechanically inoculated into three individual S. lycopersicum cv. Momotaro. Symptoms appearing on inoculated tomatoes were indistinguishable from those of diseased tomato plants found initially in the greenhouse. Flexuous, filamentous particles, ~750 nm long, were observed by electron microscopy in the sap of the tomato plants inoculated with the isolate, indicating that the infecting virus may belong to the family Potyviridae. To determine genomic sequence of the virus, RT-PCR was performed. Total RNA was extracted from the tomato leaves experimentally infected with the isolate using an RNeasy Plant Mini kit (QIAGEN, Hilden, Germany). RT-PCR was performed by using a set of universal, degenerate primers for Potyviruses as previously reported (2). Amplicons (~1,500 bp) generated by RT-PCR were extracted from the gels using the QIAquick Gel Extraction kit (QIAGEN) and cloned into pCR-BluntII TOPO (Invitrogen, San Diego, CA). DNA sequences of three individual clones were determined using a combination of plasmid and virus-specific primers, showing that identity among three clones was 99.8%. A consensus nucleotide sequence of the isolate was deposited in GenBank (AB823816). BLASTn analysis of the nucleotide sequence determined showed 99% identity with a partial sequence in the NIb/coat protein (CP) region of Colombian datura virus (CDV) tobacco isolate (JQ801448). Comparison of the amino acid sequence predicted for the CP with previously reported sequences for CDV (AY621656, AJ237923, EU571230, AM113759, AM113754, and AM113761) showed 97 to 100% identity range. Subsequently, CDV infection in both the original and experimentally inoculated plants was confirmed by RT-PCR using CDV-specific primers (CDVv and CDVvc; [1]), and, hence, the causal agent of the tomato disease observed in greenhouse tomatoes was proved to be CDV. The first case of CDV on tomato was reported in Netherlands (3), indicating that CDV was transmitted by aphids from CDV-infected Brugmansia plants cultivated in the same greenhouse. We carefully investigated whether Brugmansia plants naturally grew around the greenhouses, but we could not find them inside or in proximity to the greenhouses. Therefore, sources of CDV inoculum in Japan are still unclear. This is the first report of a mosaic disease caused by CDV on commercially cultivated S. lycopersicum in Japan. References: (1) D. O. Chellemi et al. Plant Dis. 95:755, 2011. (2) J. Chen et al. Arch. Virol. 146:757, 2001. (3) J. Th. J. Verhoeven et al. Eur. J. Plant. Pathol. 102:895, 1996.
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Affiliation(s)
- Y Tomitaka
- NARO Agricultural Research Center, 3-1-1, Tsukuba, Ibaraki 305-8666, Japan
| | - T Usugi
- NARO Agricultural Research Center, 3-1-1, Tsukuba, Ibaraki 305-8666, Japan
| | - R Kozuka
- Chiba Prefectural Agriculture and Forestry Research Center Toso Vegetable Crops Laboratory, 14886, Sangawa, Asahi-shi, Chiba, 289-2714, Japan
| | - S Tsuda
- NARO Agricultural Research Center, 3-1-1, Tsukuba, Ibaraki 305-8666, Japan
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Togashi H, Ejiri A, Hiratsuka J, Nakamura K, Takase Y, Yamaguchi T, Furui H, Imamura K, Inada T, Kakuda H, Nakanishi A, Oosako T, Shinya T, Sonehara M, Tsuda S, Tsujii N, Wakatsuki T, Hasegawa M, Nagashima Y, Narihara K, Yamada I, Tojo H. Note: Multi-pass Thomson scattering measurement on the TST-2 spherical tokamak. Rev Sci Instrum 2014; 85:056103. [PMID: 24880428 DOI: 10.1063/1.4878260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In multi-pass Thomson scattering (TS) scheme, a laser pulse makes multiple round trips through the plasma, and the effective laser energy is enhanced, and we can increase the signal-to-noise ratio as a result. We have developed a coaxial optical cavity in which a laser pulse is confined, and we performed TS measurements using the coaxial cavity in tokamak plasmas for the first time. In the optical cavity, the laser energy attenuation was approximately 30% in each round trip, and we achieved a photon number gain of about 3 compared with that obtained in the first round trip. In addition, the temperature measurement accuracy was improved by accumulating the first three round trip waveforms.
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Affiliation(s)
- H Togashi
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - A Ejiri
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - J Hiratsuka
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - K Nakamura
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - Y Takase
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Yamaguchi
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - H Furui
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - K Imamura
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Inada
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - H Kakuda
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - A Nakanishi
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Oosako
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Shinya
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - M Sonehara
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - S Tsuda
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - N Tsujii
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Wakatsuki
- The University of Tokyo, Kashiwa 277-8561, Japan
| | - M Hasegawa
- Kyushu University, Kasuga 816-8580, Japan
| | | | - K Narihara
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - I Yamada
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H Tojo
- Japan Atomic Energy Agency, Naka 311-0193, Japan
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21
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Nagashima H, Tsuda S, Tsuboi N, Koshi M, Hayashi KA, Tokumasu T. An analysis of quantum effects on the thermodynamic properties of cryogenic hydrogen using the path integral method. J Chem Phys 2014; 140:134506. [DOI: 10.1063/1.4870036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ideta A, Tsuda S, Nishimiya Y, Tsuchiya K, Nakamura Y, Aoyagi Y. 46 HYPOTHERMIC STORAGE FOR 10 DAYS OF BOVINE EMBRYOS USING TYPE III ANTIFREEZE PROTEIN. Reprod Fertil Dev 2014. [DOI: 10.1071/rdv26n1ab46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Recently, we developed a medium that enabled bovine embryos to be held for up to 7 days at 4°C (Tsuchiya et al. 2014 IETS meeting). To be of practical value, mammalian embryo preservation at hypothermic temperatures must be able to maintain viability for periods longer than 7 days. Antifreeze proteins (AFP) were discovered in various organisms (such as fish, insects, plants, and bacteria) living in cold regions. They show a unique ability to protect cold-sensitive cells from hypothermic damage. Here, we found that a biomolecule known as type III AFP solubilised into an optimized solvent can keep alive bovine embryos for a maximum of 10 days at hypothermic temperatures. First, human hepatoma (HepG2) and rat insulinoma (RIN-5F) cells were stored at 4°C in Euro-Collins solution (Kobayashi Seiyaku, Osaka, Japan) supplemented with or without 10 mg mL–1 of type III AFP for 24 h. The viability rate of the cells was assessed by trypan blue (Dojindo, Kumamoto, Japan) dissolved in PBS. Second, high-quality blastocysts produced in vivo were stored at 4°C in a plastic ministraw in 25 mM HEPES medium 199 plus 20% fetal bovine serum (FBS) supplemented with or without 10 mg mL–1 of type III AFP for 10 days. Following hypothermic preservation, the chilled embryos were squeezed out of the straw into PBS and washed 3 times in the same medium. Subsequently, the embryos were cultured in CR1aa medium supplemented with 5% FBS for 48 h at 38.5°C under 5% CO2 in air with high humidity. The viability and hatching rate of the embryos were assessed at the end of the culture period. Finally, 4 embryos stored for 10 days with type III AFP were reloaded into plastic straws with the washing medium and transferred into recipient heifers (1 embryo per recipient). Pregnancy was determined by real-time B-mode ultrasonography (Convex scanner HS-1500, Honda Electronics Co. Ltd., Toyohashi, Japan) on Day 60 of gestation. Data were analysed using chi-squared and Student's t-tests. In the absence of type III AFP, the cell viability values of HepG2 and RIN-5F after hypothermic storage for 24 h were only 5 and 22%, respectively. However, in the presence of type III AFP, the cell viability values were dramatically increased (HepG2: 71%; RIN-5F: 59%) than those measured without type III AFP. To examine the effect of type III AFP for hypothermic preservation of bovine embryos, we used 80 high-quality embryos produced in vivo and assigned them randomly to 2 experimental groups. The viability and hatching rates of the chilled embryos stored with type III AFP for 10 days were significantly higher (58 and 30%, respectively) than those of without type III AFP (28 and 0%, respectively). The pregnancy rate of the chilled embryos stored with type III AFP was 50%: 2 pregnancies continue until now. In conclusion, prolongation of short-term preservation period with AFP-containing fluid will realise LN2-free storage of bovine embryos for a 10-day period.
This work was supported by the Program for Promotion of Basic and Applied Research for Innovations in Bio-Oriented Industry.
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Tsuchiya K, Ideta A, Nishimiya Y, Tsuda S, Aoyagi Y. 51 ARTIFICIAL DORMANCY OF BOVINE EMBRYOS FOR A MAXIMUM OF 7 DAYS USING A SIMPLE MEDIUM. Reprod Fertil Dev 2014. [DOI: 10.1071/rdv26n1ab51] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The worldwide pregnancy rate using cryopreserved mammalian embryos has not improved over the past 2 decades, probably because the freeze-thawing processes cause significant damage. Therefore, it is now relevant to examine the feasibility of short-term non-freezing preservation, and whether this could be applied to embryos that have high vitality and are to be transferred into recipients within several days. We introduce here an artificial dormancy fluid that can extend the hypothermic storage period of bovine embryos for a maximum of 7 days. First, to examine the effect of different basal media and the optimal concentration of fetal bovine serum (FBS) for hypothermic preservation, bovine blastocysts produced in vitro were stored at 4°C in a plastic ministraw in 1 of the following 3 media: PBS, medium 199, or Leibovitz L15 with various amount of FBS (0, 5, 20, 50, or 100%) for 3 days. Second, to examine the effect of Good's buffers, bovine embryos produced in vivo (morula to blastocyst stages) were stored at 4°C in a plastic ministraw in medium 199 plus 50% FBS supplemented with various Good's buffers [HEPES, TES, piperazine-N,N′-bis(2-ethanesulfonic acid) (PIPES), MOPS, and 4-(2-hydroxyethyl)piperazine-1-propanesulfonic acid (EPPS)] for 7 days. Following hypothermic preservation, the chilled embryos were squeezed out of the straw into PBS and washed 3 times in the same medium. Subsequently, the embryos were cultured in CR1aa medium supplemented with 5% FBS for 48 h at 38.5°C under 5% CO2 in air with high humidity. The viability rate of the embryos was assessed at the end of the culture period. Finally, to observe the pregnancy rate of chilled embryos, 32 embryos produced in vivo were stored at 4°C for 7 days in medium 199 plus 50% FBS supplemented with HEPES. Following hypothermic preservation, the chilled embryos were transferred into recipient heifers (1 embryo per recipient). Pregnancy was determined by real-time B-mode ultrasonography (Convex scanner HS-1500, Honda electronics Co. Ltd, Toyohashi, Japan) on Day 60 of gestation. Data were analysed using the chi-squared test. The viability rate of the embryos after hypothermic storage for 3 days was significantly increased for medium 199 plus 50% FBS [27/30 (90%)] compared with PBS [18/30 (60%)] or Leibovitz L15 [15/30 (50%)] plus 50% FBS (P < 0.05). Chilled embryos stored for 7 days in medium 199 plus 50% FBS supplemented with HEPES had much higher survival than embryos stored in the same medium with other Good's buffers. The pregnancy rate of the chilled embryos stored for 7 days was extremely high [24/32 (75%)] and normal live calves were delivered at term. In conclusion, maintaining artificial dormancy of bovine embryos for 7 days using a simple medium appears to be feasible. This is the first documented success of storing chilled mammalian embryos in a viable state for 7 days. To be of practical value, bovine embryo preservation at hypothermic temperatures must be able to maintain viability for periods longer than 7 days.
This work was supported by the Program for Promotion of Basic and Applied Research for Innovations in Bio-Oriented Industry.
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Hironaka K, Kikuchi M, Koaze H, Sato T, Kojima M, Yamamoto K, Yasuda K, Mori M, Tsuda S. Ascorbic acid enrichment of whole potato tuber by vacuum-impregnation. Food Chem 2011; 127:1114-8. [DOI: 10.1016/j.foodchem.2011.01.111] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 01/06/2011] [Accepted: 01/25/2011] [Indexed: 11/16/2022]
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Baba T, Matsuyama T, Sawada T, Takahama T, Wakisaka K, Tsuda S. High-Quality Polycrystalline Silicon Thin Film Prepared by a Solid Phase Crystallization Method. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-358-895] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTWe succeeded, for the first time, in depositing a silicon film which features 1000Å-wide single-crystalline grains embedded in a matrix of amorphous tissue. The deposition was done by plasma-enhanced CVD from silane diluted with hydrogen at a considerably high temperature (550°C). 5pm-thick undoped amorphous silicon film was deposited on the above film and was crystallized by a solid phase crystallization method. The polycrystalline silicon film which was obtained has a columnar structure and shows an extremely high electron mobility of 808 cm2/Vs.
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Nakano S, Wakisaka K, Kameda M, Isomura M, Matsuyama T, Nakamura N, Tsuda S, Ohnishi M, Kuwano Y. High-Quality A-Si Films Prepared by the Direct Photo-Cvd Method. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-149-417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTA high-efficiency integrated-type a-Si solar cell submodule with a size of 10cm × 10cm has been fabricated and a total area efficiency of 9.6% is obtained by using a high-quality p-layer doped with B(CH3)3 We have developed an advanced direct photo-CVD method. High-quallt” a-SI films with low tail characteristic energy and low light-induced degradation is prepared by this method. We have also studied the role of Si-H2 bonds on the light-induced effect. The result implies that Si-H bonds stabilize the defect states, resulting in a large light-induced degradation.
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Terakawa A, Shima M, Sayama K, Tarui H, Nishiwaki H, Tsuda S. Hydrogenated Amorphous Silicon Germanium Alloy for Stable Solar Cells. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-336-487] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTThe film properties and solar cell performance of a-SiGe:H samples with the same optical gap and different combinations of hydrogen content (CH) and germanium content (CGe) have been compared. The optimum composition for the initial properties, such as the tail characteristic energy, defect density and conversion efficiency of the solar cell, was determined, and the differences could be explained by the difference in H bonding configuration. The degradation ratio of the conversion efficiency becomes larger in higher CH samples. This suggests that hydrogen or Si-H2 participates in light-induced degradation. As a result, the optimum CH for an efficient solar cell is believed to shift to the lower CH region after light soaking. Based on these findings, the stabilized conversion efficiency of 3.3% under red light (γ>650nm) for an a-SiGe:H single-junction solar cell (1cm2) and 10.6% under lsun light for an a-Si/a-SiGe double-junction stacked solar cell (1cm2) have been achieved. The degradation ratio is only 8.6% for the double-junction solar cell.
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Kuriyama H, Sano K, Ishida S, Nohda T, Aya Y, Kuwahara T, Noguchi S, Kiyama S, Tsuda S, Nakano S. Lateral Grain Growth in the Excimer Laser Crystallization of Poly-Si. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-321-657] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTWe have succeeded in obtaining nondoped, thin poly-Si film (thickness ∼500Å) with excellent crystallinity and large grain size (Maximum grain size ∼4.5 μ m) by an excimer laser annealing Method, which offers the features of low-temperature processing and a short processing time. The grain size distribution shrinks in the region around 1.5 μ m and this poly-Si film exhibits a strong (111) crystallographic orientation. Poly-Si thin film transistors using these films show quite a high field effect mobility of 440cm2/V · s below 600°C process.
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Tsuda S, Sato T, Takahashi F, Satoh D, Endo A, Sasaki S, Namito Y, Iwase H, Ban S, Takada M. Analysis of the effect of structural materials in a wall-less tissue-equivalent proportional counter irradiated by 290 MeV u(-1) carbon beam. Radiat Prot Dosimetry 2011; 143:450-454. [PMID: 21183535 DOI: 10.1093/rpd/ncq536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Effects of structural materials in a wall-less tissue-equivalent proportional counter were evaluated based on the calculation of energy deposits by EGS5 and the measurement of lineal energy distributions using 290 MeV u(-1) carbon beams. It is found that the correction of measured data based on simulation is necessary for understanding the energy deposition spectra in the homogeneous condition in tissues.
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Affiliation(s)
- S Tsuda
- Japan Atomic Energy Agency, Shirakata-shirane 2-4, Tokai, Ibaraki 319-1195, Japan.
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30
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Taguchi M, Chainani A, Matsunami M, Eguchi R, Takata Y, Yabashi M, Tamasaku K, Nishino Y, Ishikawa T, Tsuda S, Watanabe S, Chen CT, Senba Y, Ohashi H, Fujiwara K, Nakamura Y, Takagi H, Shin S. Anomalous state sandwiched between Fermi liquid and charge ordered Mott-insulating phases of Ti4O7. Phys Rev Lett 2010; 104:106401. [PMID: 20366439 DOI: 10.1103/physrevlett.104.106401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Indexed: 05/29/2023]
Abstract
The Magnéli phase Ti(4)O(7) exhibits two sharp jumps in resistivity with coupled structural transitions as a function of temperature at T(c1) approximately 142 K and T(c2) = 154 K. We have studied electronic structure changes across the two transitions using 7 eV laser, soft x-ray, and hard x-ray (HX) photoemission spectroscopy (PES). Ti 2p-3d resonant PES and HX PES show a clear metallic Fermi edge and mixed valency above T(c2). The low temperature phase below T(c1) shows a clear insulating gap of approximately 100 meV. The intermediate phase between T(c1) and T(c2) indicates a pseudogap coexisting with remnant coherent states. HX PES and complementary calculations have confirmed the coherent screening in the strongly correlated intermediate phase. The results suggest the existence of a highly anomalous state sandwiched between the mixed-valent Fermi liquid and charge ordered Mott-insulating phase in Ti(4)O(7).
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Affiliation(s)
- M Taguchi
- Soft X-ray Spectroscopy Lab, RIKEN SPring-8 Center, Sayo, Sayo, Hyogo 679-5148, Japan
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31
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Rayjada PA, Chainani A, Matsunami M, Taguchi M, Tsuda S, Yokoya T, Shin S, Sugawara H, Sato H. Kondo scaling of the pseudogap in CeOs4Sb12 and CeFe4P12. J Phys Condens Matter 2010; 22:095502. [PMID: 21389417 DOI: 10.1088/0953-8984/22/9/095502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
CeOs(4)Sb(12) and CeFe(4)P(12) are classified as Kondo semiconductors, which show coupled changes in electrical transport, thermodynamic and magnetic properties with a low-temperature semiconductor-like electrical resistivity. We have carried out core level and valence band photoemission spectroscopy on single crystal CeOs(4)Sb(12) and CeFe(4)P(12) to study their electronic structure and the evolution of states at the Fermi level as a function of temperature (∼10-300 K). The Ce 3d core level spectra show the presence of f(0), f(1) and f(2) final states with very different relative intensities in the two compounds. Single-impurity Anderson model calculations provide f electron counts of n(f) = 0.97 and 0.86 per Ce atom, suggestive of a low- and high-T(K) (= single ion Kondo temperature) for CeOs(4)Sb(12) and CeFe(4)P(12), respectively. The high-resolution temperature-dependent near-Fermi level spectra show pseudogaps of energy ∼ 50 meV and ∼ 110 meV in the valence band density of states (DOS) of CeOs(4)Sb(12) and CeFe(4)P(12), respectively. The temperature dependence of the DOS at the Fermi level follows the change in effective magnetic moment estimated from magnetic susceptibility for both materials, confirming the Kondo nature of the pseudogap in CeOs(4)Sb(12) and CeFe(4)P(12). A compilation of measured pseudogaps using photoemission and optical spectroscopy identifies the charge gaps Δ(C) for Ce-based Kondo semiconductors and provides a direct relation with T(K) given by Δ(C) ∼ 2k(B)T(K). In conjunction with the known behaviour of the spin gaps Δ(S) ∼ k(B)T(K), the results establish the coupled energy scaling of the spin and charge gaps in Kondo semiconductors.
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Affiliation(s)
- P A Rayjada
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
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32
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Ouellette SE, Li J, Sun W, Tsuda S, Walker DK, Hersom MJ, Johnson SE. Leucine/glutamic acid/lysine protein 1 is localized to subsets of myonuclei in bovine muscle fibers and satellite cells. J Anim Sci 2009; 87:3134-41. [DOI: 10.2527/jas.2009-1998] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Shimoyamada A, Ishizaka K, Tsuda S, Nakatsuji S, Maeno Y, Shin S. Strong mass renormalization at a local momentum space in multiorbital Ca1.8Sr0.2RuO4. Phys Rev Lett 2009; 102:086401. [PMID: 19257758 DOI: 10.1103/physrevlett.102.086401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2008] [Indexed: 05/27/2023]
Abstract
We have studied the mass renormalization in Ca2-xSrxRuO4 (x=0.2) using high-resolution angle-resolved photoemission spectroscopy. We observed precise band dispersions near the Fermi level (E_{F}) and the corresponding Fermi surfaces. A characteristic flat band with approximately 4 meV dispersion accompanying sharp quasiparticle (QP) peaks shows up in a limited momentum region around (pi, 0). The QP peak rapidly evolves below the crossover temperature T;{*} approximately 20 K, which agrees well with the mass enhancement behavior indicated by thermal, magnetic, and transport properties. We discuss the origin of the mass renormalization in relation to the local flat band at (pi, 0) possibly derived from the gamma (d_{xy}) band.
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Affiliation(s)
- A Shimoyamada
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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34
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Kondo H, Sugimoto H, Noro N, Xiao N, Hanada Y, Hoshino T, Tsuda S. Crystal structure of an antifreeze protein from snow mold fungi. Acta Crystallogr A 2008. [DOI: 10.1107/s010876730808820x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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35
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Abstract
This work validates a method for increasing the radial restoring force on the voice coil in audio speakers containing ferrofluid. In addition, a study is made of factors influencing splash loss of the ferrofluid due to shock. Ferrohydrodynamic analysis is employed throughout to model behavior, and predictions are compared to experimental data.
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Ishizaka K, Eguchi R, Tsuda S, Chainani A, Yokoya T, Kiss T, Shimojima T, Togashi T, Watanabe S, Chen CT, Takano Y, Nagao M, Sakaguchi I, Takenouchi T, Kawarada H, Shin S. Temperature-dependent localized excitations of doped carriers in superconducting diamond. Phys Rev Lett 2008; 100:166402. [PMID: 18518227 DOI: 10.1103/physrevlett.100.166402] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2007] [Indexed: 05/26/2023]
Abstract
Laser-excited photoemission spectroscopy is used to show that the doped carriers in metallic or superconducting diamond couple strongly to the lattice via high-energy (approximately 150 meV) optical phonons, with direct observations of localized Franck-Condon multiphonon sidebands appearing as Fermi-edge replicas. It exhibits a temperature-dependent spectral weight transfer from higher to lower energy sidebands and zero-phonon Fermi-edge states. The quantified coupling strength shows a systematic increase on lowering temperature, implicating its relation to the normal state transport and superconductivity.
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Affiliation(s)
- K Ishizaka
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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37
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Kido K, Tanaka C, Mochizuki T, Kubota K, Ohki T, Ohnishi J, Knight LM, Tsuda S. High temperatures activate local viral multiplication and cell-to-cell movement of Melon necrotic spot virus but restrict expression of systemic symptoms. Phytopathology 2008; 98:181-6. [PMID: 18943194 DOI: 10.1094/phyto-98-2-0181] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The infection of melon plants by Melon necrotic spot virus (MNSV) and the development of necrotic disease symptoms are a seasonal occurrence in Japan, which take place between winter and early summer, but not during mid-summer. In this paper we investigate the effect of three different temperatures (15, 20, and 25 degrees C) on the local and systemic expression of MNSV in melon plants. Previously, the incidence of plants expressing systemic symptoms caused by MNSV and other viruses was found to be greater at temperatures less than 20 degrees C. In this study, our temperature-shift experiments support previous studies that found the expression of systemic symptoms increases as temperature falls from 25 to 20 degrees C and decreases as temperature rises from 20 to 25 degrees C. However, MNSV replication in melon cells and local viral movement within leaves following the inoculation of melon protoplasts or cotyledons were more frequent at 25 degrees C than at 15 or 20 degrees C.
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Affiliation(s)
- K Kido
- The Yokohamaueki Co. Ltd., Minami, Yokohama, Japan
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38
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Baba T, Yokoya T, Tsuda S, Kiss T, Shimojima T, Ishizaka K, Takeya H, Hirata K, Watanabe T, Nohara M, Takagi H, Nakai N, Machida K, Togashi T, Watanabe S, Wang XY, Chen CT, Shin S. Bulk electronic structure of the antiferromagnetic superconducting phase in ErNi2B2C. Phys Rev Lett 2008; 100:017003. [PMID: 18232808 DOI: 10.1103/physrevlett.100.017003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2006] [Indexed: 05/25/2023]
Abstract
We have performed temperature- (T-)dependent laser-photoemission spectroscopy of the antiferromagnetic (AF) superconductor ErNi2B2C to study the electronic-structure evolution reflecting the interplay between antiferromagnetism and superconductivity. The spectra at the superconducting (SC) phase show a very broad spectral shape. A T-dependent SC gap shows a sudden deviation from the BCS prediction just below TN. This observation can be explained well by the theoretical model and thus represents the characteristic bulk electronic structure of the AF SC phase for the first time.
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Affiliation(s)
- T Baba
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Ishizaka K, Eguchi R, Tsuda S, Yokoya T, Chainani A, Kiss T, Shimojima T, Togashi T, Watanabe S, Chen CT, Zhang CQ, Takano Y, Nagao M, Sakaguchi I, Takenouchi T, Kawarada H, Shin S. Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy. Phys Rev Lett 2007; 98:047003. [PMID: 17358800 DOI: 10.1103/physrevlett.98.047003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2006] [Indexed: 05/14/2023]
Abstract
We investigate the temperature (T)-dependent low-energy electronic structure of a boron-doped diamond thin film using ultrahigh resolution laser-excited photoemission spectroscopy. We observe a clear shift of the leading edge below T=11 K, indicative of a superconducting gap opening (Delta approximately 0.78 meV at T=4.5 K). The gap feature is significantly broad and a well-defined quasiparticle peak is lacking even at the lowest temperature of measurement (=4.5 K). We discuss our results in terms of disorder effects on the normal state transport and superconductivity in this system.
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Affiliation(s)
- K Ishizaka
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Tsuda S, Nakane Y, Yamaguchi Y. Calculation of energy distributions of charged particles produced by neutrons from 0.14 to 65 MeV in tissue substitutes. Radiat Prot Dosimetry 2007; 126:174-7. [PMID: 17569688 DOI: 10.1093/rpd/ncm037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Energy distributions of secondary charged particles were calculated in tissue substitutes irradiated by neutrons from 0.14 to 65 MeV, using the Particle and Heavy Ion Transport code System. The calculations were compared with experimental data measured by tissue equivalent proportional counters (TEPC). It is found that the calculated distributions of the lineal energy, y, generally agree well with the measured ones for neutrons from several 100 keV to 15 MeV. In the case of 40 and 65 MeV neutron irradiations, wall effects of TEPC should be considered and the fluence of alphas is underestimated by the calculations. Integrated dose contributions of the secondary charged particles are generally in good agreement with those of the measured ones.
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Affiliation(s)
- S Tsuda
- Japan Atomic Energy Agency (JAEA), Shirakata-Shirane 2-4, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan.
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41
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Shimojima T, Ishizaka K, Tsuda S, Kiss T, Yokoya T, Chainani A, Shin S, Badica P, Yamada K, Togano K. Angle-resolved photoemission study of the cobalt oxide superconductor Na(x)CoO(2) x yH(2)O: observation of the Fermi surface. Phys Rev Lett 2006; 97:267003. [PMID: 17280457 DOI: 10.1103/physrevlett.97.267003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2006] [Indexed: 05/13/2023]
Abstract
The cobalt oxide superconductor Na(x)CoO(2) x yH(2)O is studied by angle-resolved photoemission spectroscopy. We report the Fermi surface (FS) topology and electronic structure near the Fermi level (E(F)) in the normal state of Na(x)CoO(2) x yH(2)O. Our result indicates the presence of the hexagonal FS centered at the Gamma point, while the small pocket FSs along Gamma-K direction are absent, similar to Na(x)CoO(2). The top of the e(g)(') band, which is expected in band calculations to form the small pocket FSs, extends to within approximately 30 meV below E(F), closer to E(F) than in Na(x)CoO(2). We discuss its possible role in superconductivity, comparing with other experimental and theoretical results.
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Affiliation(s)
- T Shimojima
- Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
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Selsby JT, Rother S, Tsuda S, Pracash O, Quindry J, Dodd SL. Intermittent hyperthermia enhances skeletal muscle regrowth and attenuates oxidative damage following reloading. J Appl Physiol (1985) 2006; 102:1702-7. [PMID: 17110516 DOI: 10.1152/japplphysiol.00722.2006] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Skeletal muscle reloading following disuse is characterized by profound oxidative damage. This study tested the hypothesis that intermittent hyperthermia during reloading attenuates oxidative damage and augments skeletal muscle regrowth following immobilization. Forty animals were randomly divided into four groups: control (Con), immobilized (Im), reloaded (RC), and reloaded and heated (RH). All groups but Con were immobilized for 7 days. Animals in the RC and RH groups were then reloaded for 7 days with (RH) or without (RC) hyperthermia (41-41.5 degrees C for 30 min on alternating days) during reloading. Heating resulted in approximately 25% elevation in heat shock protein expression (P < 0.05) and an approximately 30% greater soleus regrowth (P < 0.05) in RH compared with RC. Furthermore, oxidant damage was lower in the RH group compared with RC because nitrotyrosine and 4-hydroxy-2-nonenol were returned to near baseline when heating was combined with reloading. Reduced oxidant damage was independent of antioxidant enzymes (manganese superoxide dismutase, copper-zinc superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase). In summary, these data suggest that intermittent hyperthermia during reloading attenuates oxidative stress and improves the rate of skeletal muscle regrowth during reloading after immobilization.
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Affiliation(s)
- J T Selsby
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida 32611, USA
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43
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Cai YQ, Chow PC, Restrepo OD, Takano Y, Togano K, Kito H, Ishii H, Chen CC, Liang KS, Chen CT, Tsuda S, Shin S, Kao CC, Ku W, Eguiluz AG. Low-energy charge-density excitations in MgB2: Striking interplay between single-particle and collective behavior for large momenta. Phys Rev Lett 2006; 97:176402. [PMID: 17155487 DOI: 10.1103/physrevlett.97.176402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2006] [Indexed: 05/12/2023]
Abstract
A sharp feature in the charge-density excitation spectra of single-crystal MgB2, displaying a remarkable cosinelike, periodic energy dispersion with momentum transfer (q) along the c* axis, has been observed for the first time by high-resolution nonresonant inelastic x-ray scattering (NIXS). Time-dependent density-functional theory calculations show that the physics underlying the NIXS data is strong coupling between single-particle and collective degrees of freedom, mediated by large crystal local-field effects. As a result, the small-q collective mode residing in the single-particle excitation gap of the B pi bands reappears periodically in higher Brillouin zones. The NIXS data thus embody a novel signature of the layered electronic structure of MgB2.
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Affiliation(s)
- Y Q Cai
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan.
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Ohnishi J, Katsuzaki H, Tsuda S, Sakurai T, Akutsu K, Murai T. Frankliniella cephalica, a New Vector for Tomato spotted wilt virus. Plant Dis 2006; 90:685. [PMID: 30781164 DOI: 10.1094/pd-90-0685b] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Frankliniella cephalica (Crawford) is an invasive species of thrips found in the islands of Yaeyama in the Okinawa Prefecture, Japan. During the late 1990s to early 2000s, a species of thrips was isolated from wild flowers of Bidens pilosa L. and Ipomoea batatas L. growing close to cultivated fields. They were subsequently identified as F. cephalica using fine morphological characteristics with the help of Steve Nakahara (U.S. Department of Agriculture, Beltsville, MD) and Laurence Mound (CSIRO, Australia). Voucher specimens were deposited in the Laboratory of Insect Resources, Faculty of Agriculture, Tokyo University of Agriculture by Shuji Okajima (2). We investigated the ability of F. cephalica to vector Tomato spotted wilt virus (TSWV) by experimentally determining virus transmission efficiency. Newly hatched larvae as much as 12 h old underwent a viral acquisition-access period (AAP) of 24 h, during which they fed on the leaves of Datura stramonium infected with TSWV-O, a Japanese type isolate. Transmission efficiency of adults 4 days after emergence from molt (14 days after the AAP) was determined by a petunia leaf disk assay (3) in which the adults were individually allowed to feed for successive 24-h inoculation access periods (IAP) on two different leaf disks of Petunia × hybrida cv. Polo Blue. Transmission of the virus by the adults was considered positive if at least one of the leaf disks showed viral necrotic spot. We tested 20 randomly selected leaf disks with clear necrotic spots using a simplified rapid immunofilter paper assay. All selected disks were positive for TWSV. The transmission efficiencies were 24.6% for female (n = 57) and 54.4% for male (n = 125) adults. The efficiency was significantly different between sexes (Fisher's exact probability test, P < 0.001). We also examined changes in the virus infection site at different developmental stages in thrips using immunofluorescence microscopy with a polyclonal antibody to N protein of the virus (4). After a 6-h AAP feeding by first instar larvae, the virus was found initially to infect the epithelial cells and then spread throughout the midgut tissue in the second instar larvae 5 days after acquisition of the virus. In viruliferous adults, the virus was present in the salivary glands and on the basement membrane of the midgut tissue. These data indicate that F. cephalica is a new insect vector for TSWV. F. cephalica is a major insect pest of tropical crops in tropical and subtropical coastal belts (1). The presence of a thrips vector in weed hosts surrounding cultivated fields might increase the chance of crops in this habitat becoming infected with viruses. References: (1) M. Lamberts and J. H. Crane. Page 337 in: Advances in New Crops. J. Janick and J. E. Simon, eds. Timber Press, Portland, OR, 1990. (2) M. Masumoto and S. Okajima. Jpn. J. Appl. Entomol. Zool. 48:225, 2004. (3) T. Sakurai et al. Appl. Entomol. Zool. 39:71, 2004. (4) S. Tsuda et al. Ann. Phytopathol. Soc. Jpn. 60:216, 1994.
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Affiliation(s)
- J Ohnishi
- National Agricultural Research Center, Tsukuba, Ibaraki 305-8666
| | - H Katsuzaki
- National Agricultural Research Center, Tsukuba, Ibaraki 305-8666
| | - S Tsuda
- National Agricultural Research Center, Tsukuba, Ibaraki 305-8666
| | - T Sakurai
- National Agricultural Research Center for Tohoku Region, Iwate 020-0198
| | | | - T Murai
- Utsunomiya University, Tochigi 321-8505, Japan
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Lina BAR, Wolterbeek APM, Suwa Y, Fujikawa S, Ishikura Y, Tsuda S, Dohnalek M. Subchronic (13-week) oral toxicity study, preceded by an in utero exposure phase, with arachidonate-enriched triglyceride oil (SUNTGA40S) in rats. Food Chem Toxicol 2006; 44:326-35. [PMID: 16168548 DOI: 10.1016/j.fct.2005.08.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2005] [Revised: 06/29/2005] [Accepted: 08/04/2005] [Indexed: 10/25/2022]
Abstract
Polyunsaturated fatty acids (PUFAs), such as arachidonic acid (ARA) and docosahexaenoic acid (DHA) are natural constituents found in human milk, fish oil or egg yolk. Until recently, infant formulas, though providing the essential fatty acid precursors for these PUFAs, did not contain preformed ARA or DHA. In this study the safety of SUNTGA40S as source of ARA, not only for use in infant formulas but also for nutritional products or food supplements, was evaluated in a subchronic study in Wistar rats, preceded by a 4-week pretreatment period of parental (F(0)) rats and exposure of the F(0) dams throughout mating, gestation and lactation. SUNTGA40S was administered at dietary levels of 0.5%, 1.5% and 5% (wt/wt) adjusted with corn oil to 5.76% added fat. An additional group received 3.65% (wt/wt) SUNTGA40S in conjunction with 2.11% (wt/wt) high DHA Tuna oil, providing an ARA:DHA ratio of 2.7:1. High-fat and low-fat controls received basal diet with or without 5.76% corn-oil supplement. The content, stability and homogeneous distribution of the test substances in the diet were confirmed under study conditions. The administration of SUNTGA40S, with or without DHA oil, did not affect health, growth, fertility or reproductive performance of the parental rats, nor pup characteristics (condition, weight gain, viability, number per litter or sex ratio). In the subchronic study with the offspring (F(1)) rats, no significant differences were found in condition, neurobehavioural observations, ophthalmoscopy, growth, urinalysis or macroscopic and microscopic findings between the test groups and the low-fat or the high-fat controls. In males of the 5% SUNTGA40S and the SUNTGA40S/DHA group, red blood cell counts, haemoglobin concentration and packed cell volume were lower and reticulocytes were slightly higher than in the high-fat and low-fat control groups. Cholesterol, triglycerides and phospholipids in plasma were lower than in the high-fat controls in both sexes in the 5% SUNTGA40S and the SUNTGA40S/DHA group and (for triglycerides only) in the 1.5% SUNTGA group. Due to the administration of extra dietary fat, food intake and prothrombin time (males only) were lower and alkaline phosphatase activity was higher in all the high-fat groups, including the corn-oil controls, as compared to the low-fat controls. The weight of the spleen was higher in males of the 5% SUNTGA40S and the SUNTGA40S/DHA group compared to both the low-fat and the high-fat controls. The effects noted in this study at high dose levels of SUNTGA40S are consistent with previously reported physiological responses to dietary intake of high PUFA containing oils. The present results provide evidence that SUNTGA40S is a safe source of arachidonic acid. Except during lactation when the intake in dams doubled, 5% Suntga40S in the diet was equivalent to an overall intake of approximately 3g/kg body weight/day in F(0) and F(1) animals.
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Affiliation(s)
- B A R Lina
- TNO Quality of Life, Toxicology and Applied Pharmacology, Zeist, The Netherlands.
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Eguchi R, Kiss T, Tsuda S, Shimojima T, Mizokami T, Yokoya T, Chainani A, Shin S, Inoue IH, Togashi T, Watanabe S, Zhang CQ, Chen CT, Arita M, Shimada K, Namatame H, Taniguchi M. Bulk- and surface-sensitive high-resolution photoemission study of two mott-hubbard systems: SrVO3 and CaVO3. Phys Rev Lett 2006; 96:076402. [PMID: 16606115 DOI: 10.1103/physrevlett.96.076402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2005] [Indexed: 05/08/2023]
Abstract
We study the electronic structure of Mott-Hubbard systems SrVO3 and CaVO3 with bulk and surface-sensitive high-resolution photoemission spectroscopy, using a vacuum ultraviolet laser, synchrotron radiation, and a discharge lamp (hv = 7-21 eV). A systematic suppression of the density of states (DOS) within approximately 0.2 eV of the Fermi level (EF) is found on decreasing photon energy, i.e., on increasing bulk sensitivity. The coherent band in SrVO3 and CaVO3 is shown to consist of surface and bulk-derived features, separated in energy. The stronger distortion on surface of CaVO3 compared to SrVO3 leads to a higher surface metallicity in the coherent DOS at EF, consistent with recent theory.
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Affiliation(s)
- R Eguchi
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Shimoyamada A, Tsuda S, Ishizaka K, Kiss T, Shimojima T, Togashi T, Watanabe S, Zhang CQ, Chen CT, Matsushita Y, Ueda H, Ueda Y, Shin S. Heavy-fermion-like state in a transition metal oxide LiV2O4 single crystal: indication of Kondo resonance in the photoemission spectrum. Phys Rev Lett 2006; 96:026403. [PMID: 16486605 DOI: 10.1103/physrevlett.96.026403] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2005] [Indexed: 05/06/2023]
Abstract
We have performed a vacuum ultraviolet laser excited photoemission spectroscopy on a d-electron heavy-fermion-like material LiV2O4 single crystal. We observed a sharp peak structure in the density of states at approximately 4 meV above the Fermi level (E(F)). The evolution of the peak height corresponds well with the crossover behavior to the heavy-fermion-like state as observed in the thermal and transport properties. The position, shape, and temperature (T) dependence of the peak structure is quite similar to the Kondo resonance observed in conventional f-electron heavy Fermion compounds.
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Affiliation(s)
- A Shimoyamada
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Ichiki TU, Nagaoka EN, Hagiwara K, Uchikawa K, Tsuda S, Omura T. Integration of mutations responsible for the attenuated phenotype of Pepper mild mottle virus strains results in a symptomless cross-protecting strain. Arch Virol 2005; 150:2009-20. [PMID: 15968477 DOI: 10.1007/s00705-005-0551-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2004] [Accepted: 04/07/2005] [Indexed: 11/29/2022]
Abstract
An enhanced attenuated strain of Pepper mild mottle virus (PMMoV) was constructed by incorporating mutations that affect viral attenuation from three reported attenuated strains of PMMoV, which causes serious economic losses in the production of green pepper in Japan. The new strain caused no symptoms on pepper plants and protected them from infection by a wild-type strain. The mutations responsible for viral attenuation were located in the intervening region (IR) of the 126-kDa/183-kDa proteins. The mutations had synergistic effects in terms of the attenuation of symptoms and decreased the accumulation of the viral coat protein in infected pepper plants. In this paper, we propose an efficient method for the improvement of attenuated viruses by reverse genetics in plant viruses.
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Affiliation(s)
- T U Ichiki
- National Agricultural Research Center, Tsukuba, Ibaraki, Japan.
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Abstract
Patients with staphylococcal infection of the skin were examined for immunological status. All cases examined in the present study had gamma-globulin levels within the normal range. The proliferative response of peripheral blood lymphocytes to staphylococcal antigen was significantly depressed in patients with furunculosis as compared with that in patients with common furuncle or in healthy controls. All patients with furunculosis showed higher titers of anti-Staphylococcus aureus antibody than did those with furuncle. The dissociation between cellular and humoral immunity in furunculosis seems to be explained in terms of immune deviation.
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Affiliation(s)
- S Tsuda
- Department of Dermatology, Kurume University School of Medicine, Asahimachi, Kurume 830, Japan
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Tojimbara T, Nakajima I, Sato S, Nakamura M, Kawase T, Kai K, Tsuda S, Kudo S, Fuchinoue S, Teraoka S. Results of kidney transplantation in patients receiving MMF- or MMF and basiliximab-containing immunosuppression. Transplant Proc 2004; 36:2087-9. [PMID: 15518755 DOI: 10.1016/j.transproceed.2004.08.084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
UNLABELLED Mycophenolate mofetil (MMF) is a more potent immunosuppressive drug than azathioprine or mizoribine in combination with cyclosporine (CsA) and steroids. Recently, basiliximab (BA), an interleukin-2 receptor antagonist, has become available in Japan. The purpose of this study was to evaluate the efficacy of an extremely low CsA dose immunosuppressive protocol with MMF versus MMF plus BA after renal transplantation (RTx). PATIENTS Between September 2001 and March 2003, we performed 79 RTx with CsA-based immunosuppression, including nine from cadavers and 70 from living donors with 15 ABO-incompatible RTx. Immunosuppression consisted of methylprednisolone (MP), CsA and MMF (group 1; n = 24) versus added BA during the induction phase (group 2; n = 55). In group 2, MP was withdrawn on postoperative day 14. Supplementary MP, muromonab-CD3, or gusperimus was administered if rejection was suspected clinically or diagnosed by biopsy. RESULTS The incidence of biopsy-proven acute rejection (AR) was significantly higher among group 1 than group 2 patients (P < .05). CsA C2 levels in group 1 were significantly higher than group 2 at each time (P < .01). The incidence of infection was comparable. Patient and graft survival rates in group 1 were 100% and 100%; in group 2, they were 98% and 98%, respectively. CONCLUSION The short-term results of RTx were favorable in both the MMF, and the MMF plus BA immunosuppression. In addition, BA significantly reduced the number of AR episodes. Early steroid withdrawal in recipients receiving BA induction was not associated with an increased risk of AR.
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Affiliation(s)
- T Tojimbara
- Department of Surgery III, Tokyo Women's Medical University, Tokyo, Japan.
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