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Kiyohara A, Daimon H, Yamaguchi M, Ueda Y. Types of grocery stores and demographic and household factors in Japanese provincial area. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.218] [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] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Neighborhood grocery stores, such as supermarkets (SM) and convenience stores (CVS), have received attention as a determinant of a food purchase behavior. Previous studies reported that grocery store entry or closure was associated with regional populations. This study examines the association of types of SM (i.e. cross-regional, local, or small chain stores), CVS, and household demographics in the cities, towns and villages (having its own incorporated government) in Hiroshima and Okayama Prefectures, Japan.
Methods
We hypothesized that the entry and closure of SM, CVS are associated with the regional population and type of family household from interview surveys with supermarket and wholesale operators. We collected data on SM and CVS from Large-Scale Retail Store Data in Japan, while data on demographics and households were collected from the census. Data sets from 59 municipalities (city, town, ward, and village) and 49 SM chains (498 stores) and 8 CVS chains (1235 stores) were analyzed using multiple regression analysis.
Results
Some household factors showed significant associations with the number of SM and CVS at the municipality level. Those municipalities with a greater number of extended families and single households had significantly more “cross-regional” as well as “local chain SM” stores. Those municipalities with more nuclear families had significantly more “small chain SM” and fewer “local chain SM” stores. Those municipalities with more single households had significantly fewer SM stores.
Conclusions
In these prefectures, population declining and single household increasing are expected over the coming decades. If no political interventions are allowed on this issue, some of “food desert” may emerge for the hundreds of thousands people living in these areas; elderly people may not get fresh vegetables in their neighborhood, and young parents will have to drive for hours to “cross-regional SM” to buy fresh milk for their children.
Key messages
Supermarkets and convenience stores are determinant of a food purchase behavior. The association of the number of types of SM, CVS, and demographic and household factors.
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Affiliation(s)
- A Kiyohara
- Faculty of Urban Management, Fukuyama city university, Hiroshima Prefecture, Fukuyama, Japan
| | - H Daimon
- Faculty of Urban Management, Fukuyama city university, Hiroshima Prefecture, Fukuyama, Japan
| | - M Yamaguchi
- Faculty of Agriculture, Ryukoku University, Shiga Prefecture, Otu, Japan
| | - Y Ueda
- Faculty of Human Life Science, Osaka city University, Osaka Prefecture, Sakai, Japan
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2
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Yokoyama Y, Yamasaki Y, Taguchi M, Hirata Y, Takubo K, Miyawaki J, Harada Y, Asakura D, Fujioka J, Nakamura M, Daimon H, Kawasaki M, Tokura Y, Wadati H. Tensile-Strain-Dependent Spin States in Epitaxial LaCoO_{3} Thin Films. Phys Rev Lett 2018; 120:206402. [PMID: 29864291 DOI: 10.1103/physrevlett.120.206402] [Citation(s) in RCA: 2] [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: 08/24/2017] [Indexed: 06/08/2023]
Abstract
The spin states of Co^{3+} ions in perovskite-type LaCoO_{3}, governed by the complex interplay between the electron-lattice interactions and the strong electron correlations, still remain controversial due to the lack of experimental techniques which can directly detect them. In this Letter, we revealed the tensile-strain dependence of spin states, i.e., the ratio of the high- and low-spin states, in epitaxial thin films and a bulk crystal of LaCoO_{3} via resonant inelastic soft x-ray scattering. A tensile strain as small as 1.0% was found to realize different spin states from that in the bulk.
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Affiliation(s)
- Y Yokoyama
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
- Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
| | - Y Yamasaki
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
- National Institute for Materials Science (NIMS), Tsukuba 305-0047, Japan
| | - M Taguchi
- Nara Institute of Science and Technology (NAIST), 8916-5, Takayama, Ikoma, Nara 630-0192, Japan
| | - Y Hirata
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
- Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
| | - K Takubo
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
| | - J Miyawaki
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
| | - Y Harada
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
| | - D Asakura
- Research Institute for Energy Conservation, National Institute of Advance Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba 305-8568, Japan
| | - J Fujioka
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan
| | - M Nakamura
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - H Daimon
- Nara Institute of Science and Technology (NAIST), 8916-5, Takayama, Ikoma, Nara 630-0192, Japan
| | - M Kawasaki
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - Y Tokura
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - H Wadati
- Institute for Solid State Physics, University of Tokyo, Chiba 277-8581, Japan
- Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
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Irvan, Husaini T, Trisakti B, Batubara F, Daimon H. Composting of empty fruit bunches in the tower composter – effect of air intake holes. ACTA ACUST UNITED AC 2018. [DOI: 10.1088/1757-899x/309/1/012066] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Pincelli T, Lollobrigida V, Borgatti F, Regoutz A, Gobaut B, Schlueter C, Lee TL, Payne DJ, Oura M, Tamasaku K, Petrov AY, Graziosi P, Granozio FM, Cavallini M, Vinai G, Ciprian R, Back CH, Rossi G, Taguchi M, Daimon H, van der Laan G, Panaccione G. Quantifying the critical thickness of electron hybridization in spintronics materials. Nat Commun 2017; 8:16051. [PMID: 28714466 PMCID: PMC5520016 DOI: 10.1038/ncomms16051] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [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: 11/17/2016] [Accepted: 05/15/2017] [Indexed: 11/09/2022] Open
Abstract
In the rapidly growing field of spintronics, simultaneous control of electronic and magnetic properties is essential, and the perspective of building novel phases is directly linked to the control of tuning parameters, for example, thickness and doping. Looking at the relevant effects in interface-driven spintronics, the reduced symmetry at a surface and interface corresponds to a severe modification of the overlap of electron orbitals, that is, to a change of electron hybridization. Here we report a chemically and magnetically sensitive depth-dependent analysis of two paradigmatic systems, namely La1−xSrxMnO3 and (Ga,Mn)As. Supported by cluster calculations, we find a crossover between surface and bulk in the electron hybridization/correlation and we identify a spectroscopic fingerprint of bulk metallic character and ferromagnetism versus depth. The critical thickness and the gradient of hybridization are measured, setting an intrinsic limit of 3 and 10 unit cells from the surface, respectively, for (Ga,Mn)As and La1−xSrxMnO3, for fully restoring bulk properties. Surface versus bulk effects in electronic structure of spintronics materials are crucial to their applications but are yet well understood. Here the authors experimentally determine the critical thickness that defines the crossover of electron hybridization between surface and bulk for two prototype spintronics materials.
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Affiliation(s)
- T Pincelli
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy.,Dipartimento di Fisica, Università di Milano, Via Celoria 16, Milano I-20133, Italy
| | - V Lollobrigida
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy.,Dipartimento di Scienze, Università degli Studi Roma Tre, Via della Vasca Navale 84, Roma I-00146, Italy
| | - F Borgatti
- Consiglio Nazionale delle Ricerche-Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), via P. Gobetti 101, Bologna I-40129, Italy
| | - A Regoutz
- Department of Materials, Imperial College London, South Kensington, London SW7 2AZ, UK
| | - B Gobaut
- Sincrotrone Trieste S.C.p.A., S.S. 14 Km 163.5, Area Science Park, Trieste 34149, Italy
| | - C Schlueter
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - T-L Lee
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - D J Payne
- Department of Materials, Imperial College London, South Kensington, London SW7 2AZ, UK
| | - M Oura
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - K Tamasaku
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - A Y Petrov
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy
| | - P Graziosi
- Consiglio Nazionale delle Ricerche-Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), via P. Gobetti 101, Bologna I-40129, Italy
| | - F Miletto Granozio
- CNR-SPIN, Complesso Universitario Monte S. Angelo, Napoli 80126, Italy.,Dipartimento di Fisica, Università 'Federico II' di Napoli, Napoli, 80126, Italy
| | - M Cavallini
- Consiglio Nazionale delle Ricerche-Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), via P. Gobetti 101, Bologna I-40129, Italy
| | - G Vinai
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy
| | - R Ciprian
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy
| | - C H Back
- Institut fur Experimentelle Physik, Universitat Regensburg, Regensburg D-93040, Germany
| | - G Rossi
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy.,Dipartimento di Fisica, Università di Milano, Via Celoria 16, Milano I-20133, Italy
| | - M Taguchi
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan.,Nara Institute of Science and Technology, 8-9165 Takayama, Ikoma, Nara 630-0192, Japan
| | - H Daimon
- Nara Institute of Science and Technology, 8-9165 Takayama, Ikoma, Nara 630-0192, Japan
| | - G van der Laan
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - G Panaccione
- Istituto Officina dei Materiali-CNR, Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy
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Irvan, Trisakti B, Tomiuchi Y, Harahap U, Daimon H. Effect of Recycle Sludge on Anaerobic Digestion of Palm Oil Mill Effluent in A Thermophilic Continuous Digester. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1757-899x/206/1/012094] [Citation(s) in RCA: 4] [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: 11/11/2022]
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Lee M, Arras R, Warot-Fonrose B, Hungria T, Lippmaa M, Daimon H, Casanove MJ. Strain induced atomic structure at the Ir-doped LaAlO3/SrTiO3 interface. Phys Chem Chem Phys 2017; 19:28676-28683. [DOI: 10.1039/c7cp05918c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Different levels of Ir doping at the LaAlO3/SrTiO3 interface affect the strain state in LaAlO3, as investigated using atomically resolved microscopy (HAADF-STEM), electron energy loss spectroscopy (EELS) and first-principles calculations (DFT).
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Affiliation(s)
- M. Lee
- Centre d’Elaboration des Matériaux et d’Etudes Structurales (CEMES)
- CNRS UPR 8011 and Université de Toulouse
- F-31055 Toulouse
- France
- Nara Institute of Science and Technology (NAIST)
| | - R. Arras
- Centre d’Elaboration des Matériaux et d’Etudes Structurales (CEMES)
- CNRS UPR 8011 and Université de Toulouse
- F-31055 Toulouse
- France
| | - B. Warot-Fonrose
- Centre d’Elaboration des Matériaux et d’Etudes Structurales (CEMES)
- CNRS UPR 8011 and Université de Toulouse
- F-31055 Toulouse
- France
| | - T. Hungria
- Centre de MicroCaractérisation Raimond Castaing
- Université de Toulouse
- F-31400 Toulouse
- France
| | - M. Lippmaa
- Institute for Solid State Physics
- University of Tokyo
- 277-8581 Chiba
- Japan
| | - H. Daimon
- Nara Institute of Science and Technology (NAIST)
- Ikoma 630-0192
- Japan
| | - M. J. Casanove
- Centre d’Elaboration des Matériaux et d’Etudes Structurales (CEMES)
- CNRS UPR 8011 and Université de Toulouse
- F-31055 Toulouse
- France
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8
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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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Sakai C, Takeda SN, Daimon H. System to measure accurate temperature dependence of electric conductivity down to 20 K in ultrahigh vacuum. Rev Sci Instrum 2013; 84:075103. [PMID: 23902102 DOI: 10.1063/1.4812336] [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: 06/02/2023]
Abstract
We have developed the new in situ electrical-conductivity measurement system which can be operated in ultrahigh vacuum (UHV) with accurate temperature measurement down to 20 K. This system is mainly composed of a new sample-holder fixing mechanism, a new movable conductivity-measurement mechanism, a cryostat, and two receptors for sample- and four-probe holders. Sample-holder is pushed strongly against the receptor, which is connected to a cryostat, by using this new sample-holder fixing mechanism to obtain high thermal conductivity. Test pieces on the sample-holders have been cooled down to about 20 K using this fixing mechanism, although they were cooled down to only about 60 K without this mechanism. Four probes are able to be touched to a sample surface using this new movable conductivity-measurement mechanism for measuring electrical conductivity after making film on substrates or obtaining clean surfaces by cleavage, flashing, and so on. Accurate temperature measurement is possible since the sample can be transferred with a thermocouple and∕or diode being attached directly to the sample. A single crystal of Bi-based copper oxide high-Tc superconductor (HTSC) was cleaved in UHV to obtain clean surface, and its superconducting critical temperature has been successfully measured in situ. The importance of in situ measurement of resistance in UHV was demonstrated for this HTSC before and after cesium (Cs) adsorption on its surface. The Tc onset increase and the Tc offset decrease by Cs adsorption were observed.
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Affiliation(s)
- C Sakai
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara 630-0101, Japan.
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10
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Yoshida S, Endo K, Sakuma E, Misawa S, Okumura H, Daimon H, Muneyama E, Yamanaka M. Electrical Properties of 3C-SiC and its application to FET. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-97-259] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [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
ABSTRACTElectrical and luminescent properties of nondoped, and N-doped n-type 3C-SiC layers epitaxially grown on Si(100) by chemical vapor deposition were studied. Nondoped n-type epilayers with carrier concentration of 1×1016cm−3 and the Hall mobility of 750cm2/Vs at room temperature have the activation energy of donors, Ed=2OmeV, which is different from that of the donors in the N-doped layers. The photoluminescence spectra of nondoped layers are different from those of N-doped ones. These results suggest that the donors in the unintentionally doped n-type 3C-SiC are not due to N impurities. 45–70 % of N-donors in the N-doped epilayers are compensated.Schottky-barrier and MOS-type field-effect transistors have been fabricated from 3C-SiC. The transistor operations of MESFETs and MOSFETs were studied at elevated temperatures up to 440°C. Transconductances of 1.7mS/mm and 0.15mS/mm for MESFET and 0.8 and 0.05mS/mm for MOSFET at room temperature and 440°C, respectively, were obtained. The drain currentvoltage characteristics of both the FETs at room temperature did not change in the least after heating up to 440°C in the air.
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11
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Takahashi T, Sekiguchi K, Shirasawa T, Voegeli W, Hattori K, Hattori A, Daimon H, Wakabayashi Y. Three-dimensional imaging of interface atoms using crystal-truncation rod scattering. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308082354] [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: 11/10/2022] Open
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12
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Faisal M, Saeki T, Tsuji H, Daimon H, Fujie K. Recycling of poly lactic acid into lactic acid with high temperature and high pressure water. ACTA ACUST UNITED AC 2006. [DOI: 10.2495/wm060251] [Citation(s) in RCA: 10] [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: 11/09/2022]
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13
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Haraguchi LH, Fujita M, Daimon H, Fujie K, Mohamed RS. Biological phosphate removal using a degradable carbon source produced by hydrothermal treatment of excess sludge. Braz J Chem Eng 2006. [DOI: 10.1590/s0104-66322006000100004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | | | - H. Daimon
- Toyohashi University of Technology Hibarigaoka, Japan
| | - K. Fujie
- Toyohashi University of Technology Hibarigaoka, Japan
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14
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Matsuda H, Daimon H, Kato M, Kudo M. Approach for simultaneous measurement of two-dimensional angular distribution of charged particles: spherical aberration correction using an ellipsoidal mesh. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 71:066503. [PMID: 16089887 DOI: 10.1103/physreve.71.066503] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2005] [Indexed: 05/03/2023]
Abstract
An approach for simultaneous measurement of two-dimensional angular distribution of charged particles is proposed. This concerns spherical aberration correction in electrostatic lenses with potential use of a mesh. In an earlier work, an effective use of a spherical mesh has succeeded to obtain a large acceptance angle limited to around 60 degrees (+/- 30 degrees). The present work is aimed at dramatically increasing acceptance angles limited in conventional lenses. For this purpose, spherical aberration behavior of mesh lenses is studied in detail using an analytical approximation and ray tracing, with particular attention paid to the effect of the mesh shape. It is shown here that the lens ability to correct spherical aberration over wide aperture angles can be effectively enhanced by the ellipsoidal deformation of a spherical mesh. We demonstrate that an effective use of an ellipsoidal mesh provides remarkable performance characteristics for electrostatic lenses, which opens new possibilities in surface and materials analysis techniques. Simple examples of ellipsoidal mesh lenses are presented that allow very wide acceptance angles of up to 120 degrees.
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Affiliation(s)
- H Matsuda
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
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15
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Kim K, Fujita M, Daimon H, Fujie K. Application of hydrothermal reaction for excess sludge reuse as carbon sources in biological phosphorus removal. Water Sci Technol 2005; 52:533-41. [PMID: 16459831] [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] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
An application of hydrothermal reaction was investigated to reuse excess sludge as carbon sources for enhancement of biological phosphorus removal. Under the tested conditions, solubilization of treated excess sludge did not present much variation, sustaining around 65%, except the results obtained at 400 degrees C. Biodegradability of excess sludge was improved through its content change by the reaction, without much reduction of carbon contents even in 7 min. From the results of respirometric test, readily biodegradable substrate was found at 300 degrees C. Then its portion of reaction products increased with increasing reaction temperature. In the readily biodegradable substrate, acetic and propionic acid, which are useful carbon sources for phosphorus accumulating microorganism under anaerobic condition, increased with increasing reaction temperature. Hydrothermal reaction might be accepted as suitable pretreatment method to treat excess sludge prior to biological treatment process. This technology also secures excess sludge reuse, enhancing biological phosphorus removal and improvement of biological treatment process.
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Affiliation(s)
- K Kim
- Department of Ecological Engineering, Toyohashi University of Technology, Hibarigaoka 1-1, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan.
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16
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Daimon H. Stereoscopic microscopy of atomic arrangement by circularly polarized-light photoelectron diffraction. Phys Rev Lett 2001; 86:2034-2037. [PMID: 11289848 DOI: 10.1103/physrevlett.86.2034] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2000] [Indexed: 05/23/2023]
Abstract
A principle for stereoscopic photographs that enables viewing three-dimensional atomic arrangements is proposed. The azimuthal shifts of forward-focusing peaks in the photoelectron diffraction pattern obtained by left and right helicity lights enables a stereoscopic image when the two images are, respectively, viewed by the left eye and the right eye simultaneously. By taking advantage of this phenomenon, a display-type spherical-mirror analyzer can obtain stereoscopic photographs directly on the screen without any computer-aided conversion process.
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Affiliation(s)
- H Daimon
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0101, Japan
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Akasaka Y, Daimon H, Mii M. Improved plant regeneration from cultured leaf segments in peanut (Arachis hypogaea L.) by limited exposure to thidiazuron. Plant Sci 2000; 156:169-175. [PMID: 10936523 DOI: 10.1016/s0168-9452(00)00251-x] [Citation(s) in RCA: 3] [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] [Indexed: 05/23/2023]
Abstract
Bud primordia were induced from leaf segments, which were harvested from young seedlings of Spanish type peanut (Arachis hypogaea L. cv. Chico), on 0.8% agar-solidified medium containing Murashige and Skoog (MS) basal salts supplemented with B5 vitamins, 1 mg/l NAA and various cytokinins such as benzyladenine (BA), isopentenyladenine (2ip), kinetin (KIN), chloropyridylphenylurea (4PU), thidiazuron (TDZ), zeatin (ZTN) in different concentrations. Among the cytokinins tested, TDZ was found to be the most efficient for inducing bud primordia. However, continuous culture on TDZ-containing media induced abnormal development of these primordia, and they failed to grow into plantlets. Histological observations revealed that the malformation most often obtained was a shoot-like structure which lacked shoot apical meristem (SAM) and had disorganized vascular bundles. For normal shoot regeneration, it was necessary to limit the culture period of the explants on TDZ-containing medium to 7 days at 10 mg/l or 21 days at 1 mg/l and then transfer them onto plant growth regulator-free medium. The percentage of conversion from shoot buds to shoots was 34.7%. When shoots were removed from the explants and transferred onto basal medium containing 1 mg/l NAA, all regenerated shoots readily rooted and successfully acclimatized. All of the acclimatized plants produced viable seeds in the greenhouse condition.
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Affiliation(s)
- Y Akasaka
- Laboratory of Plant Cell Technology, Faculty of Horticulture, Chiba University, Matsudo, 271-8510, Chiba, Japan
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18
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Abstract
The effect of pretreatment with pentachlorophenol (PCP), a known inhibitor of sulfotransferases, on the induction of chromosomal aberrations, sister chromatid exchanges (SCEs), replicative DNA synthesis (RDS), and the formation of DNA adducts was studied in the liver of rats treated with safrole (1-allyl-3,4-methylenedioxy-benzene). Rats were given a single oral dose (1,000 mg/kg body weight) or 5 repeated doses (500 mg/kg body weight) of safrole, with or without intraperitoneal pretreatment with PCP (10 mg/kg body weight). Hepatocytes were isolated 24 hr after administration of safrole and allowed to proliferate in Williams' medium E supplemented with epidermal growth factor to test for chromosomal aberrations and SCEs. For examination of RDS, hepatocytes were incubated in Williams' medium E containing 5-bromo-2'-deoxyuridine. Safrole-DNA adducts were detected by a nuclease P1-enhanced 32P-postlabeling assay. A single dose of safrole induced significant SCEs and RDS, while chromosomal aberrations were induced by 5 repeated doses. Two major and 2 minor DNA adducts were detected by both a single dose and 5 repeated doses. PCP significantly decreased safrole-induced cytogenetic effects and RDS, and caused a decrease in DNA adducts formed by safrole. These results suggest that safrole is capable of inducing SCEs, chromosomal aberrations, and RDS in the rat liver in vivo and that these effects may be induced by the sulfuric acid ester metabolite that can bind DNA.
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Affiliation(s)
- H Daimon
- Drug Safety Research Laboratories, Eisai Co., Ltd., Gifu-ken, Japan
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19
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Abstract
Safrole (1-allyl-3,4-methylenedioxybenzene) was tested for its ability to induce sister chromatid exchanges (SCEs) and chromosomal aberrations (CAs) and to form DNA adducts in Chinese hamster lung (CHL) cells, in order to investigate the relationship between cytogenetic effects and DNA adduct formation under the same treatment conditions. The cells were treated with 0.025-0.2 mg/ml safrole in the presence or absence of rat liver postmitochondrial supernatant fraction (S9). Safrole induced significant SCEs and CAs dose-dependently in the presence of S9. SCEs ranged in number from 15.6 to 21.1 SCEs/cell and CAs were observed in 4-37% of cells. Using the 32P-postlabeling assay, two major and two minor safrole-DNA adducts were detected in DNA digests obtained from CHL cells in the presence of S9. The levels of total DNA adducts ranged from 1.3 to 22.8 adducts/10(7) nucleotides. The two major adducts were shown to be guanine derivatives since these adducts comigrated on polyethylenimine plates with the adducts produced by the reaction of safrole with 2'-deoxyguanosine 3'-monophosphate. A correlation was seen between DNA adducts and SCEs or CAs. Neither induction of SCEs and CAs nor formation of DNA adducts was observed in the absence of S9. These findings suggest that SCEs and CAs induced by safrole result from covalent DNA modification metabolically activated by S9 in cultured cells.
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Affiliation(s)
- H Daimon
- Drug Safety Research Laboratories, Eisai Co., Ltd., Gifu-ken, Japan
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Ohara A, Akasaka Y, Daimon H, Mii M. Plant regeneration from hairy roots induced by infection with Agrobacterium rhizogenes in Crotalaria juncea L. Plant Cell Rep 2000; 19:563-568. [PMID: 30754818 DOI: 10.1007/s002990050774] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Hairy roots were induced from leaf segments of Crotalaria juncea, which is used as a green manure crop antagonistic to nematodes, by infection with a mikimopine type wild strain of Agrobacterium rhizogenes A13 (MAFF02-10266). These roots exhibited vigorous growth and abundant lateral branching on half-strength Murashige and Skoog (1/2MS) medium without phytohormones. The adventitious shoots were induced from 30% of root segments 3 months after transfer onto medium containing 3 mg/l benzyl adenine. These shoots produced roots 1 month after transfer onto 1.2% agar-solidified 1/2MS medium without phytohormones. Regenerated plants were successfully grown under greenhouse conditions. The transgenic nature of the regenerated plants was confirmed by Southern-blot analysis.
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Affiliation(s)
- A Ohara
- Hokkaido National Agricultural Experiment Station, Shinsei, Memuro, Kasai, Hokkaido 0820071, Japan, , , , , , JP
| | - Y Akasaka
- Faculty of Horticulture, Chiba University, Matsudo, Chiba 2718510, Japan e-mail: Fax: +81-47-3088852, , , , , , JP
| | - H Daimon
- College of Agriculture, Osaka Prefecture University, Sakai, Osaka 5998531, Japan, , , , , , JP
| | - M Mii
- Faculty of Horticulture, Chiba University, Matsudo, Chiba 2718510, Japan e-mail: Fax: +81-47-3088852, , , , , , JP
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Toritsuka N, Daimon H, Sawada S, Sagami F, Tirone P, Morisetti A, Bussi S, Adams K. [Mutagenicity study of gadobenate dimeglumine formulation (E7155) (2)--Chromosome aberration test with human lymphocytes in culture]. J Toxicol Sci 1999; 24 Suppl 1:95-101. [PMID: 10637784 DOI: 10.2131/jts.24.supplementi_95] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 11/02/2022]
Abstract
The mutagenic potential of gadobenate dimeglumine formulation (E7155) was studied by the chromosome aberration test in cultured human lymphocytes. Human lymphocytes were exposed to E7155 at 0.078-10 mM both in the presence and absence of S9 mix derived from rat livers. Three dose levels (2.5-10 mM) were selected for the metaphase analysis. E7155 induced no increase in the incidence of aberrant cells or polyploid cells in any treatments both in the presence and absence of metabolic activation. Thus, it is concluded that E7155 has shown no evidence of clastogenic or polyploidy-inducing activity under these experimental conditions.
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Affiliation(s)
- N Toritsuka
- Department of Developmental Safety Assessment Research, Eisai Co., Ltd., Gifu, Japan
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22
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Toritsuka N, Daimon H, Sawada S, Sagami F, Tirone P, Morisetti A, Bussi S, Fassio F. [Mutagenicity study of gadobenate dimeglumine formulation (E7155) (3)--Micronucleus test in rat bone marrow cells]. J Toxicol Sci 1999; 24 Suppl 1:103-6. [PMID: 10637785 DOI: 10.2131/jts.24.supplementi_103] [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: 11/02/2022]
Abstract
The mutagenic potential of gadobenate dimeglumine formulation (E7155) was studied by the micronucleus test in rats. Single intraperitoneal injection of E7155 to Sprague Dawley rats at the dose of 5295.2 mg/kg (5 mmol/kg) did not induce any statistically significant increase in the frequency of micronucleate cells in the bone marrow sampled after 18, 42 and 66 hr from time of administration.
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Affiliation(s)
- N Toritsuka
- Department of Developmental Safety Assessment Research, Eisai, Co., Ltd., Gifu, Japan
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23
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Asakura S, Daimon H, Sawada S, Sagami F. A short-term assessment of tumor-promotion activity in the livers of rats treated with two genotoxic methylating agents: dimethylnitrosamine and methylnitrosourea. Toxicol Lett 1998; 98:155-67. [PMID: 9788584 DOI: 10.1016/s0378-4274(98)00112-x] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Induction of replicative DNA synthesis (RDS) and mitoinhibitory effects were studied in the hepatocytes of F344 rats exposed in vivo to the methylating agents dimethylnitrosamine (DMN, hepatocarcinogen) and methylnitrosourea (MNU, non-hepatocarcinogen). Cytotoxicity and chromosome aberrations (CA) in rat liver were also investigated to clarify the cause of changes in RDS and mitoinhibitory effects, respectively. The animals were killed at different intervals (up to 14 days) after a single oral dose, or 1 day after 7 or 14 days of repeated oral doses. The hepatocytes were isolated and cultured with Williams' medium E to assess their RDS, mitoinhibitory effects and CA. Mitoinhibitory effects were investigated by monitoring their effect on epidermal growth factor-induced replicative DNA synthesis (EGF-induced RDS) in rat hepatocytes. Hepatotoxic effects were assessed by measuring aspartate transaminase and alanine transaminase in the plasma and by histopathological examination. In the single-dose study, DMN (20 mg/kg body weight (bw)) induced both RDS and hepatotoxicity. MNU (50 mg/kg bw) induced RDS without causing hepatotoxicity, and thus was classified as a mitogen. In the repeated-dose study, DMN (4 mg/kg bw) induced both RDS and hepatotoxicity, but MNU (10 mg/kg bw) induced neither. Both inhibition of EGF-induced RDS and induction of CA were observed in the hepatocytes of rats treated with DMN, but were not observed with MNU in both single and repeated dose studies. The mitoinhibitory effect of DMN persisted for 14 days after the single dose and time dependently increased for 14 days after repeated administration. This mitoinhibitory effect correlated positively with CA. The mitoinhibitory effect was thought to be attributable to the DNA-damaging effect that induces CA. We concluded that the differences which we found in this study between DMN and MNU contribute to the differences in their hepatocarcinogenicity. Our findings suggested that both cell proliferative and mitoinhibitory properties play an important role in tumor promotion, and measuring them may provide an ancillary index that is useful in predicting hepatocarcinogenicity.
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Affiliation(s)
- S Asakura
- Tsukuba Drug Safety Research, Drug Safety Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan.
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Saitoh Y, Nakatani T, Matsushita T, Miyahara T, Fujisawa M, Soda K, Muro T, Ueda S, Harada H, Sekiyama A, Imada S, Daimon H, Suga S. Twin helical undulator beamline for soft X-ray spectroscopy at SPring-8. J Synchrotron Radiat 1998; 5:542-544. [PMID: 15263572 DOI: 10.1107/s090904959701902x] [Citation(s) in RCA: 5] [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: 08/04/1997] [Accepted: 12/08/1997] [Indexed: 05/24/2023]
Abstract
A very high resolution soft X-ray beamline, BL25SU, has been designed and is under construction at SPring-8. Completely right or left circularly polarized light is supplied on a common axis of a newly designed twin helical undulator. A helicity modulation up to 10 Hz can be performed using five kicker magnets. The fundamental radiation covers the region 0.5-3 keV. Higher-order radiation is rather weak on the axis. A monochromator with varied-line-spacing plane gratings is installed to cover the region below 1.5 keV. A very high resolution beyond 10(4) is expected for the whole energy region.
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Affiliation(s)
- Y Saitoh
- JAERI-RIKEN SPring-8 Project Team, Kamigori, Ako-gun, Hyogo 678-12, Japan
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25
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Abstract
The induction of chromosome aberrations, sister chromatid exchanges (SCEs), and the formation of DNA adducts was studied in hepatocytes of F344 rats exposed in vivo to safrole. Hepatocytes were isolated 24 h after a single dose of safrole or five repeated doses (once a day) by gastric intubation and allowed to proliferate in Williams' medium E supplemented with epidermal growth factor. Cells were fixed after 48 h in culture. Safrole-DNA adducts were detected by a nuclease P1-enhanced 32P-post-labeling assay in isolated hepatocytes from the rats. While a single dose was not sufficient to induce detectable levels of chromosome aberrations at the time of assay, five repeated doses induced these changes with a maximum frequency of 13.4%, compared with the control value of 1.8%. Both a single dose and five repeated doses induced significant SCEs, to a maximum frequency of 0.81 SCEs per chromosome, while the control value was 0.59 SCEs per chromosome. Two major and two minor DNA adducts were detected after treatment with either a single dose or five repeated doses. The maximum amount of total DNA adducts was 89.8 DNA adducts/10(7) nucleotides. These results show that safrole is a genotoxic carcinogen in the rat liver in vivo and suggest that the cytogenetic effects of this compound may result from covalent DNA modification in the rat liver. This in vivo cytogenetic assay should provide a useful means of evaluation of the genotoxicity of hepatocarcinogens.
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Affiliation(s)
- H Daimon
- Drug Safety Research Laboratories, Eisai Co., Ltd., Hashima-gun, Gifu-ken, Japan.
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26
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Abstract
Induction of chromosome aberrations and sister chromatid exchanges (SCEs) was studied in hepatocytes of F344 rats exposed in vivo to the hepatocarcinogen quinoline (Q). Hepatocytes were isolated 4-48 hr after a single dose of 200 mg/kg body weight or 24 hr after 28 repeated doses (once a day) of 25-200 mg/kg body weight/day by gastric intubation, and allowed to proliferate in Williams' medium E supplemented with epidermal growth factor. Cells were fixed after a culture period of 48 hr. A single dose of Q induced chromosome aberrations in up to 22% of metaphase cells, and SCEs with a frequency of up to 1.27 per chromosome 12 hr after the dose, while the control values were 1% and 0.63 per chromosome, respectively. Treatment with 28 repeated doses of Q induced significant chromosome aberrations and SCEs dose-dependently. Cytogenetic damage induced induced in the liver by repeated doses of Q was greater than induced by a single dose. Furthermore, Q induced replicative DNA synthesis in the liver, but failed to induce micronucleus formation in the bone marrow. The noncarcinogen 8-hydroxyquinoline was also examined and found to be essentially non-genotoxic to rat liver. These results show that Q is a genotoxic carcinogen to rat liver and the present method of in vivo cytogenetic assay should be useful for evaluating the genotoxicity of hepatocarcinogens.
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Affiliation(s)
- S Asakura
- Drug Safety Research Laboratories, Eisai Co., Gifu, Japan
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Nakatani T, Nishimoto H, Daimon H, Suga S, Namba H, Ohta T, Kagoshima Y, Miyahara T. Photoelectron holography of the si(001) surface. J Synchrotron Radiat 1996; 3:239-44. [PMID: 16702685 DOI: 10.1107/s0909049596006346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Three-dimensional images of the near-surface atom arrangement were calculated from two-dimensional photoelectron diffraction data by several imaging algorithms: (i) a basic method with a Fourier transformation at one kinetic energy over k space, considering the phase factor due to the path-length difference; (ii) energy summation of the above results; (iii) Fourier transformation within small k-space windows; and (iv) their combinations. Atomic images produced by these methods from the experimental Si 2p photoelectron diffraction patterns of an Si(001) surface are compared with the crystal geometry. The results show that the energy-summed small-window method, called SWEEP, gives the best images.
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Saitoh Y, Matsushita T, Imada S, Daimon H, Suga S, Fujii J, Shimada K, Kakizaki A, Ono K, Fujisawa M, Kinoshita T, Ishii T. Spin-resolved 3p and 3s core-level photoemission spectra of ferromagnetic nickel. Phys Rev B Condens Matter 1995; 52:11549-11552. [PMID: 9980266 DOI: 10.1103/physrevb.52.r11549] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sawada S, Asakura S, Daimon H, Furihata C. Comparison of autoradiography, liquid scintillation counting and immunoenzymatic staining of 5-bromo-2'-deoxyuridine for measurement of unscheduled DNA synthesis and replicative DNA synthesis in rat liver. Mutat Res 1995; 344:109-16. [PMID: 7491128 DOI: 10.1016/0165-1218(95)00039-9] [Citation(s) in RCA: 16] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Different methods for evaluating unscheduled DNA synthesis (UDS) and replicative DNA synthesis (RDS) were studied in hepatocytes of F344 rats exposed in vivo to dimethylnitrosamine (DMN) or CCl4. Hepatocytes were isolated and incubated in Williams' medium E supplemented with either [3H]thymidine for autoradiography or 5-bromo-2'-deoxyuridine for immunoenzymatic staining. In the method of liquid scintillation counting, the cells were incubated with [3H]thymidine with or without hydroxyurea. The nuclear fraction was isolated and the incorporation of [3H]thymidine into nuclear DNA was determined by a liquid scintillation counter. DMN at doses of 0.625-5 mg/kg body weight induced UDS of 1.6-37.9 (0 dose; -6.9) net grains/nucleus measured by autoradiography and 337-1377 (0 dose; 177) dpm/microgram DNA in the presence of hydroxyurea measured by a liquid scintillation counter. CCl4 at doses of 50-400 mg/kg body weight induced RDS in 1.5-12.1% (0 dose; 0.12%) and 1.8-14.6% (0 dose; 0.16%) of cells with the methods of autoradiography and immunoenzymatic staining, respectively, and of 2991-24256 (0 dose; 324) dpm/microgram DNA in the absence of hydroxyurea with the method of liquid scintillation counting. Similar dose-dependent induction of UDS and RDS was observed with these methods. These results suggest that the methods of liquid scintillation counting and immunoenzymatic staining have almost the same sensitivity for measuring UDS and RDS as that of autoradiography.
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Affiliation(s)
- S Sawada
- Department of Drug Safety Research, Eisai Co., Ltd., Gifu-ken, Japan
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Hanada T, Daimon H, Ino S. Rocking-curve analysis of reflection high-energy electron diffraction from the Si(111)-( sqrt 3 x sqrt 3 )R30 degrees-Al, -Ga, and -In surfaces. Phys Rev B Condens Matter 1995; 51:13320-13325. [PMID: 9978135 DOI: 10.1103/physrevb.51.13320] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Asakura S, Sawada S, Daimon H, Fukuda T, Ogura K, Yamatsu K, Furihata C. Effects of dietary restriction on induction of unscheduled DNA synthesis (UDS) and replicative DNA synthesis (RDS) in rat liver. Mutat Res 1994; 322:257-64. [PMID: 7523919 DOI: 10.1016/0165-1218(94)90101-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [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: 01/25/2023]
Abstract
The effects of dietary restriction on the induction of unscheduled DNA synthesis (UDS) and replicative DNA synthesis (RDS) were studied in the hepatocytes of F344 rats exposed in vivo to dimethylnitrosamine (DMN) or CCl4. The animals were given food ad libitum, a restricted amount of food (4 g/rat/overnight) or no food. Hepatocytes were isolated 2 h after oral administration of DMN at a dose of 5 mg/kg body weight and 48 h after oral administration of CCl4 at a dose of 400 mg/kg body weight, and incubated for 4 h in Williams' medium E supplemented with either [3H]thymidine for UDS or 5-bromodeoxyuridine for RDS. UDS was determined by autoradiography and RDS was determined by the immunoenzymatic staining method. The background levels of UDS (net grains/nucleus) and RDS (cells in S phase) in control were -12.4 and 0.64% for ad libitum feeding, -6.8 and 0.04% for restricted feeding, and -8.1 and 0% for fasting. UDS induced by DMN and RDS induced by CCl4 were 19.4 and 3.3% for ad libitum feeding, 34.5 and 10.4% for restricted feeding, and 47.8 and 15.1% for fasting. DMN demethylase activity in rat liver was also found to increase with dietary restriction. These results indicate that dietary restriction modulates the responses of UDS and RDS in the liver of rats.
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Affiliation(s)
- S Asakura
- Department of Drug Safety Research, Eisai Co. Ltd., Gifu-ken, Japan
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Sakamoto K, Okuda T, Nishimoto H, Daimon H, Suga S, Kinoshita T, Kakizaki A. Photoemission study of the Si(111)3 x 1-K surface. Phys Rev B Condens Matter 1994; 50:1725-1732. [PMID: 9976362 DOI: 10.1103/physrevb.50.1725] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sawada S, Daimon H, Asakura S, Kawaguchi T, Yamatsu K, Furihata C, Matsushima T. Cumulative effects of chromosome aberrations and sister chromatid exchanges in rat liver induced in vivo by heterocyclic amines. Carcinogenesis 1994; 15:285-90. [PMID: 8313519 DOI: 10.1093/carcin/15.2.285] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Cumulative effects of chromosome aberrations and sister chromatid exchanges (SCEs) were studied in hepatocytes of F344 rats exposed in vivo to 2-amino-3-methylimidazo[4,5-f]quinoline (IQ) at doses of 12.5, 25 or 50 mg/kg body wt/day or 2-nitro-3-methylimidazo[4,5-f]quinoline (nitro-IQ) at doses of 12.5, 25 or 50 mg/kg body wt/day. Hepatocytes were isolated 24 h after 1, 7, 14 or 28 repeated doses (once a day) by gastric intubation and allowed to proliferate in Williams' medium E supplemented with epidermal growth factor. Cells were fixed after a culture period of 48 h. Multiple treatment with IQ or nitro-IQ induced significant chromosome aberrations time- and dose-dependently, the maximum frequency of chromosome aberrations in metaphase cells being 39 and 33% respectively, while that in controls was 1.1%. Single treatment with IQ or nitro-IQ induced significant SCEs dose-dependently, the maximum frequency being 0.83 and 0.79 per chromosome respectively, while the control value was 0.51. Multiple treatment with nitro-IQ induced significant SCEs to a plateau level of 0.90 per chromosome. Cytogenetic damage in the liver by IQ was greater than that by nitro-IQ. These results show that this assay of chromosome aberrations and SCEs in rat liver in vivo without partial hepatectomy or mitogen treatment in vivo is a sensitive method for evaluating the cumulative tumor-initiating activities of carcinogenic heterocyclic amines at low doses and should be useful for the detection of unknown hepatocarcinogens.
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Affiliation(s)
- S Sawada
- Department of Drug Safety Research, Eisai Co. Ltd., Gifu-ken, Japan
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Fukuda H, Fujii T, Daimon H, Iwata M, Ogawa T, Tanase S, Morino Y. Purification and characterization of cytochrome P450 from an isobutene-forming microorganism, Rhodotorula minuta. Biosci Biotechnol Biochem 1993; 57:1599-601. [PMID: 7764227 DOI: 10.1271/bbb.57.1599] [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: 01/27/2023]
Abstract
A cytochrome P450 was purified from microsomes of Rhodotorula minuta. The optical spectrum of the purified cytochrome was characteristic of a low-spin ferric heme protein. Isovalerate caused a type I spectral change in it. The amino-terminal sequence of the cytochrome was different from those of other known microsomal cytochrome P450s. These results indicate that the cytochrome, which is tentatively named P450rm, is a novel species of cytochrome P450.
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Affiliation(s)
- H Fukuda
- Department of Applied Microbial Technology, Kumamoto Institute of Technology, Japan
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Shimamoto T, Izawa H, Daimon H, Ishiguro N, Shinagawa M, Sakano Y, Tsuda M, Tsuchiya T. Cloning and nucleotide sequence of the gene (citA) encoding a citrate carrier from Salmonella typhimurium. J Biochem 1991; 110:22-8. [PMID: 1718953 DOI: 10.1093/oxfordjournals.jbchem.a123537] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [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: 12/28/2022] Open
Abstract
A cryptic citrate transport gene (citA) from Salmonella typhimurium chromosome was cloned and its nucleotide sequence was determined. The cloned plasmid conferred citrate-utilizing ability on wild-type Escherichia coli, which cannot grow on citrate as the sole source of carbon. The resultant E. coli transformant was able to transport citrate. A 1,302-base-pair open reading frame with a preceding ribosomal binding site was found in the cloned DNA fragment. The 434-amino-acid protein that could be translated from this open reading frame is highly hydrophobic (69% nonpolar amino acid residues), consistent with the fact that the transport protein is an intrinsic membrane protein. The molecular weight of this protein was calculated to be 47,188. The gene sequence determined is highly homologous to those of Cit+ plasmid-mediated citrate transport gene, citA, from E. coli, the chromosomal citA gene from Citrobacter amalonaticus and the chromosomal cit+ gene from Klebsiella pneumoniae. The hydropathy profile of the deduced amino acid sequence suggests that this carrier has 12 hydrophobic segments, which may span the membrane lipid bilayer.
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Shin S, Suga S, Taniguchi M, Fujisawa M, Kanzaki H, Fujimori A, Daimon H, Ueda Y, Kosuge K, Kachi S. Vacuum-ultraviolet reflectance and photoemission study of the metal-insulator phase transitions in VO2, V6O13, and V2O3. Phys Rev B Condens Matter 1990; 41:4993-5009. [PMID: 9994356 DOI: 10.1103/physrevb.41.4993] [Citation(s) in RCA: 175] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Abstract
The chromosomal DNA fragment (BamHI-BglII fragment of 2,972 base pairs) conferring citrate utilization in Citrobacter amalonaticus ATCC 25405 was cloned and sequenced. Two genes (citA and citB) identified in the Cit+ determinant were found in a BamHI-BglII fragment from C. amalonaticus. Southern DNA-DNA hybridization experiments and the construction of Cit- mutants of C. amalonaticus showed that C. amalonaticus has a single copy of the cit gene on the chromosome.
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Affiliation(s)
- H Daimon
- Department of Veterinary Public Health, Obihiro University of Agriculture and Veterinary Medicine, Japan
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Wastlhuber UH, Baljer G, Daimon H, Hübert PH, Mayr A. [Comparative studies of plasmid distribution in Escherichia coli (E. coli) strains from healthy and diarrheic dogs and their owners]. Zentralbl Veterinarmed B 1988; 35:218-29. [PMID: 3048022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Aizawa T, Tsuno T, Daimon H, Ino S. Si(111)7 x 7 and Si(111) sqrt 3-bar x sqrt 3-bar-al surface-structure analysis by ion-induced Auger-electron spectroscopy. Phys Rev B Condens Matter 1987; 36:9107-9114. [PMID: 9942771 DOI: 10.1103/physrevb.36.9107] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Suga S, Taniguchi M, Shin S, Sakamoto H, Yamamoto M, Seki M, Murata Y, Daimon H. Performance of a new plane-grating grazing-incidence UHV monochromator. ACTA ACUST UNITED AC 1984. [DOI: 10.1016/0167-5087(84)90507-6] [Citation(s) in RCA: 6] [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: 10/27/2022]
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Sugawara M, Daimon H, Tenpaku M, Nakama Y, Nagayama H. [Basic postures and comfort of patients]. Kurinikaru Sutadi 1983; 4:1464-75. [PMID: 6560165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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Daimon H, Kumanotani J. Lösungsmitteleffekte bei der radikalischen polymerisation von Cyclododecylacrylat. 2. Mitt. Polymerisation. Colloid Polym Sci 1978. [DOI: 10.1007/bf01746800] [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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Daimon H, Okitsu H, Kumanotani J. Glasumwandlungs-Verhalten von statistischer und Block-Copolymeren und von Polymerblends aus Styrol und Cyclododecylacrylat. 1. Mitt. Glastemperaturen. Colloid Polym Sci 1977. [DOI: 10.1007/bf01776363] [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: 11/24/2022]
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