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Munoz-Noval A, Fukami K, Kuruma T, Hayakawa S. Structure and complexation mechanism of aqueous Zn(II)-acetate complex studied by XAFS and Raman spectroscopies. ANAL SCI 2024:10.1007/s44211-024-00549-z. [PMID: 38580852 DOI: 10.1007/s44211-024-00549-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 02/27/2024] [Indexed: 04/07/2024]
Abstract
In this work, the structure of Zn acetate has been determined by a combination of X-ray absorption fine structure and Raman spectroscopy. We have analyzed the local atomic environment and the main vibrational bands of the acetate and Zn acetate at different pH. The results suggest that Zn acetate complex acquires a bidentate structure that modifies its first coordination shell. Meanwhile, the coordination shell of the hydrated Zn cation is formed by 6 hydroxides at a mean distance of 2.06 Å, the coordination shell of the Zn cation in the complex is formed by 2 hydroxides and 2 oxygens from the carboxyl group of the acetate, at a mean Zn-O distance of 1.96 Å. The structure of the Zn acetate complex is compared to those of Zn malonate and Zn citrate, none of which present a reduction in the coordination shell neither a shrinkage of the Zn-O shell distance.
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Affiliation(s)
- Alvaro Munoz-Noval
- Department of Materials Physics, Faculty of Physics, University Complutense of Madrid, 28040, Madrid, Spain.
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Hiroshima, 739-8527, Japan.
| | - Kazuhiro Fukami
- Department of Materials Science and Engineering, Kyoto University, Kyoto, 606-8501, Japan
| | - Takuya Kuruma
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Hiroshima, 739-8527, Japan
- Mitsui Mining and Smelting Co Ltd, Shinagawa-Ku, Tokyo, Japan
| | - Shinjiro Hayakawa
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Hiroshima, 739-8527, Japan
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Murofushi K, Kuribayashi S, Ohnishi K, Hayakawa S, Tsuchida K, Inoue Y, Ohkawa A, Ishida T, Machitori Y, Nakai K, Takizawa D. Multi-Institutional Fact-Finding Study: Association between Geriatric Assessment and Reduction in Intensity of Radiotherapy for Elderly Cancer Patients without Metastasis. Int J Radiat Oncol Biol Phys 2023; 117:S126-S127. [PMID: 37784325 DOI: 10.1016/j.ijrobp.2023.06.470] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Vulnerable patients receive a low-intensity, palliative treatment rather than the standard treatment. Defining vulnerability in terms of standard or reduced radiation intensity can result in appropriate radiotherapy for elderly cancer patients without excessive adverse events and poor outcomes. However, it is difficult to define vulnerability, because radiation oncologists hesitate to include vulnerable patients in clinical trials involving radical radiotherapy. We hypothesized that for elderly cancer patients without metastasis, vulnerability scores, obtained by geriatric assessment (GA), could help in predicting the reduction in radiation intensity determined by radiation oncologists based on their experience. MATERIALS/METHODS In this multicenter prospective study, we enrolled cancer patients (70 years or older) without metastasis. The reduction in radiation intensity was categorized into 3 groups as follows: i) standard schedule of radiotherapy, but conversion of irradiation fields, ii) standard irradiation fields, but converted schedule of radiotherapy, and iii) conversion of radiotherapy schedule and irradiation fields. Standard radiotherapy was defined as recommended doses and radiation fields according to the guidelines for the primary tumors analyzed. GA was performed by calculating geriatric 8 (G8) and vulnerable elders survey (VES-13) scores before radiotherapy and 3-5 and 8-16 weeks after completion of radiotherapy. The primary endpoint was to evaluate the correlation between vulnerability assessed by G8 and change in radiation intensity. RESULTS Between November 2020 and February 2022, 317 patients were included in this study at 13 centers in Japan. The median age was 77 (range, 70-90) years. The primary cancer sites were head and neck, esophagus, lungs, breasts, pancreas, bladder, uterus, and prostate in 63, 22, 62, 48, 6, 5, 26, and 85 patients, respectively. High-precision radiotherapy was performed for 199 patients (63%). Of the 31 patients (10%) whose radiation intensity was reduced, 14, 9, and 8 patients were provided i, ii, and iii category, respectively. Planned radiotherapy was completed for 312 patients (98%). G8 and VES-13 vulnerability scores were obtained for 201 and 61 patients, respectively, before radiotherapy. The mean G8 and VES-13 scores were 13.3 ± 2.4 and 1.8 ± 1.8, 12.9 ± 2.6 and 2.0 ± 2.0, and 13.4 ± 2.4 and 2.0 ± 1.9 before radiotherapy and 3-5 and 8-16 weeks after completion of radiotherapy, respectively. Multivariate analysis revealed that reduction in radiation intensity was significantly associated with vulnerability assessed using VES-13 (p < 0.001) but not G8 (p = 0.06). CONCLUSION An excellent completion rate was obtained for planned radiotherapy, and vulnerability assessed using VES-13, not G8, was associated with the reduction in intensity of radiotherapy.
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Affiliation(s)
- K Murofushi
- Department of Radiation Oncology, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan
| | | | - K Ohnishi
- National Center for Global Health and Medicine, Chiba, Japan
| | - S Hayakawa
- Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan
| | | | - Y Inoue
- Department of Radiation Oncology, Hyogo Cancer Center, Akashi, Japan
| | - A Ohkawa
- Mito Medical Center, Ibaraki, Japan
| | - T Ishida
- Ibaraki Prefectural Central Hospital, Ibaraki Cancer Center, Tsukuba, Japan
| | - Y Machitori
- Tokyo Metropolitan Bokutou Hospital, Tokyo, Japan
| | - K Nakai
- Departement of Radiation Oncology and Proton Medical Research Center, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - D Takizawa
- Hitachi General Hospital, Ibaraki, Japan
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Link Vasco J, Stellhorn JR, Klee BD, Paulus B, Belz J, Haust J, Hosokawa S, Hayakawa S, Volz K, Rojas León I, Christmann J, Dehnen S, Pilgrim WC. Structure determination in a new type of amorphous molecular solids with different nonlinear optical properties: a comparative structural analysis. J Phys Condens Matter 2023. [PMID: 37253361 DOI: 10.1088/1361-648x/acda06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The microscopic structures of two amorphous molecular solids with extremely nonlinear optical properties have been studied. They consist of Organotetrel chalcogenide clusters with the chemical formula [(RSn)4S6]. The basic molecular building blocks are adamantane-like {Sn4S6} cores with organic ligands R attached to the Sn atoms. While the material equipped with R=naphthyl generates frequency doubling upon irradiation with a simple IR laser diode, the material decorated with R=phenyl responds by emitting brilliant white light. The structural differences were investigated using X-ray scattering and EXAFS combined with molecular RMC. Transmission electron microscopy and scanning precession electron diffraction were used to examine structural differences from mesoscopic down to microscopic scales. Characteristic differences were found on all scales. While close core-to-core distances between {Sn4S6} cluster cores and molecular distortions are found in the white light emitting material, undistorted molecules and significantly larger core distances characterize the material showing frequency doubling. Here however, results of scanning precession electron diffraction reveal the formation of nanocrystalline structures in the amorphous matrix, which we identify as cause for the suppression of white light emission
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Affiliation(s)
- Jonathan Link Vasco
- Chemistry Department, Philipps-University of Marburg, Hans-Meerwein-Strasse 4, Marburg, 35032, GERMANY
| | - Jens Rüdiger Stellhorn
- Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8602, JAPAN
| | - Benjamin D Klee
- Wigner Research Centre for Physics, Budapest 1121, Budapest, Budapest, 1121, HUNGARY
| | - Benedict Paulus
- Chemistry, Philipps-Universitat Marburg, Hans-Meerwein-Strasse 4, Marburg, 35032, GERMANY
| | - Jürgen Belz
- Physics Department, Philipps-University of Marburg, Hans-Meerwein-Strasse 6, Marburg, Baden-Württemberg, 35032, GERMANY
| | - Johannes Haust
- Physics Department, Philipps-University of Marburg, Hans-Meerwein-Strasse 6, Marburg, 35032, GERMANY
| | - Shinya Hosokawa
- Department of Physics, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, JAPAN
| | - Shinjiro Hayakawa
- Department of Applied Chemistry, Hiroshima University, Higashihiroshima, Higashihiroshima, 739-8511, JAPAN
| | - Kerstin Volz
- Physics, Philipps-Universitat Marburg, Hans-Meerwein-Strasse 6, Marburg, 3532, GERMANY
| | - Irán Rojas León
- Chemistry Department, Philipps-University of Marburg, Hans-Meerwein-Strasse 4, Marburg, 35032, GERMANY
| | - Jan Christmann
- Chemistry Department, Philipps-University of Marburg, Hans-Meerwein-Strasse 4, Marburg, Baden-Württemberg, 35032, GERMANY
| | - Stefanie Dehnen
- Chemistry, KIT, Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, Baden-Württemberg, 76344, GERMANY
| | - Wolf Christian Pilgrim
- Chemistry Department, Philipps-University of Marburg, Hans-Meerwein-Strasse 4, Marburg, 35032, GERMANY
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Tadano W, Tanabe E, Stellhorn JR, Komaguchi K, Hayakawa S. Density estimations and comparisons of a fragmented single fiber using X-ray computed tomography. ANAL SCI 2023; 39:235-240. [PMID: 36418842 DOI: 10.1007/s44211-022-00225-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 09/24/2022] [Accepted: 11/17/2022] [Indexed: 11/25/2022]
Abstract
A commercial X-ray computed tomography (CT) apparatus using a quasi-monochromatic beam was utilized for density estimations and comparisons of a fragmented single fiber. The validation of quasi-monochromaticity of the X-ray source was investigated by radiograph measurements. For the case of a transmittance higher than 50%, the contribution of Cu Kα characteristic X-rays was dominant. To realize a sufficient statistical quality, an attempt to increase the number of averaged voxels was demonstrated using the neighboring slices of the 3D-CT image. A minimum value of the coefficient of variation (CV) was achieved using multiple images rather than using a single image. The observed values of the inverse of the transmitted X-ray intensity (CT value) of the polymers showed a fairly good relationship with their density. An analytical curve derived from measurements of reference samples of known densities could provide the relative density of an unknown fragmented fiber down to the size of 30 μm in diameter and 35 μm in length. The CV of the estimated density was from 1.5 to 2%, which was estimated from the CV of CT values. Moreover, the correlation of CT values was improved with the linear absorption coefficient than the density. A better performance of discrimination of polymers including fibers might be realized with the difference of linear absorption coefficients for X-rays.
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Affiliation(s)
- Wataru Tadano
- Forensic Science Laboratory, Hiroshima Prefectural Police H.Q, 2-26-3 Konan, Naka, Hiroshima, 730-0825, Japan. .,Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan.
| | - Eishi Tanabe
- West Region Industrial Research Center, Hiroshima Prefectural Technology Research Institute, 3-13-26 Kagamiyama, Higashi-Hiroshima, 739-0046, Japan
| | - Jens R Stellhorn
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan.,Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan
| | - Kenji Komaguchi
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan.,Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan
| | - Shinjiro Hayakawa
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan. .,Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan.
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Yamaguchi H, Hayakawa S, Ma N, Shimizu H, Okawa K, Zhang Q, Yang L, Kahl D, La Cognata M, Lamia L, Abe K, Beliuskina O, Cha S, Chae K, Cherubini S, Figuera P, Ge Z, Gulino M, Hu J, Inoue A, Iwasa N, Kim A, Kim D, Kiss G, Kubono S, La Commara M, Lattuada M, Lee E, Moon J, Palmerini S, Parascandolo C, Park S, Phong V, Pierroutsakou D, Pizzone R, Rapisarda G, Romano S, Spitaleri C, Tang X, Trippella O, Tumino A, Zhang N, Lam Y, Heger A, Jacobs A, Xu S, Ma S, Ru L, Liu E, Liu T, Hamill C, Murphy ASJ, Su J, Fang X, Kwag M, Duy N, Uyen N, Kim D, Liang J, Psaltis A, Sferrazza M, Johnston Z, Li Y. RIB induced reactions: Studying astrophysical reactions with low-energy RI beam at CRIB. EPJ Web Conf 2023. [DOI: 10.1051/epjconf/202327501015] [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: 02/05/2023] Open
Abstract
Astrophysical reactions involving radioactive isotopes (RI) often play an important role in high-temperature stellar environments. The experimental studies on the reaction rates for those are still limited mainly due to the technical difficulties in producing high-quality RI beams. A direct measurement of those reactions would be still challenging in many cases, however, we can make a reliable evaluation of the reaction rates by an indirect method or by studying the resonance prorerties. Here we ntroduce recent examples of experimental studies on such RI-involving astrophysical reactions, performed at Center for Nuclear Study, the University of Tokyo, using the low-energy RI beam separator CRIB. One is for the neutron-induced destruction reactions of 7Be in the Big-Bang nucleosynthesis, and the other is the study on the 22Mg(α, p) reaction relevant in X-ray bursts, which was performed with the resonant scattering method from the inverse reaction channel.
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Murofushi K, Murofushi W, Komazawa M, Ohnishi K, Shimizuguchi T, Ito K, Hayakawa S, Ishikawa H. Preliminary Study on Establishing a Heart Rate Variability–Based Method for Objectively Evaluating Bone Metastasis Pain. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1673] [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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7
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Tadano W, Takeuchi M, Tanabe E, Stellhorn JR, Komaguchi K, Nakamoto A, Honda S, Hayakawa S. Non-destructive analysis of hollow-shaped single fibers using X-ray computed tomography. J Forensic Sci 2022; 67:1461-1467. [PMID: 35521892 DOI: 10.1111/1556-4029.15055] [Citation(s) in RCA: 1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 04/23/2022] [Accepted: 04/25/2022] [Indexed: 11/28/2022]
Abstract
A commercial high-resolution X-ray computed tomography (CT) was utilized for non-destructive analysis of single fibers. The micro-CT apparatus was employed because it is applicable to both colored and colorless fibers. A sample preparation using adhesive sheets was demonstrated, and the method is similar to typical tape-lift sample collection method in crime cases. Different cross-sectional shapes of nylon and polyester single fibers were non-destructively distinguished, and the method is applicable to all types of fibers. Cross-sectional areas, aperture ratios, and volumes of individual fibers were directly and automatically measured using the open-source software. The observed parameters were within a coefficient of variation of 3%. In addition, a mass of a single fragment of a fiber can be estimated when the local density is given.
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Affiliation(s)
- Wataru Tadano
- Forensic Science Laboratory, Hiroshima Prefectural Police H.Q, Hiroshima, Japan.,Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Hiroshima, Japan
| | - Masaru Takeuchi
- Forensic Science Laboratory, Hiroshima Prefectural Police H.Q, Hiroshima, Japan
| | - Eishi Tanabe
- West Region Industrial Research Center, Hiroshima Prefectural Technology Research Institute, Hiroshima, Japan
| | - Jens R Stellhorn
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Hiroshima, Japan.,Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima, Japan
| | - Kenji Komaguchi
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Hiroshima, Japan.,Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima, Japan
| | - Akihiro Nakamoto
- Forensic Science Laboratory, Hiroshima Prefectural Police H.Q, Hiroshima, Japan
| | - Sadao Honda
- Japan Synchrotron Radiation Research Institute, Hyogo, Japan
| | - Shinjiro Hayakawa
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Hiroshima, Japan.,Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima, Japan
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8
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Hu J, Yamaguchi H, Lam Y, Heger A, Kahl D, Jacobs A, Johnston Z, Xu S, Zhang N, Ma S, Ru L, Liu E, Liu T, Hayakawa S, Yang L, Shimizu H, Hamill C, Murphy AS, Su J, Fang X, Chae K, Kwag M, Cha S, Duy N, Uyen N, Kim D, Pizzone R, La Cognata M, Cherubini S, Romano S, Tumino A, Liang J, Psaltis A, Sferrazza M, Kim D, Li Y, Kubono S. First measurement of 25Al+p resonant scattering relevant to the astrophysical reaction 22Mg( α,p) 25Al. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202226005001] [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: 11/15/2022] Open
Abstract
Type I X-ray bursts (XRBs) are the most frequently observed thermonuclear explosions in nature. The 22Mg(α,p)25Al reaction plays a critical role in XRB models. However, experimental information is insufficient to deduce a precise 22Mg(α,p)25Al reaction rate for the respective XRB temperature range. A new measurement of 25Al+p resonant scattring was performed up to the astrophysically interested energy region of 22Mg(α,p)25Al. Several resonances were observed in the excitation functions, and their level properties have been determined based on an R-matrix analysis. In particular, proton widths and spin-parities of four natural-parity resonances above the α threshold of 26Si, which can contribute the reaction rate of 22Mg(α,p)25Al, were first experimentally determined.
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9
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Yamaguchi H, Hayakawa S, Ma N, Shimizu H, Okawa K, Yang L, Kahl D, La Cognata M, Lamia L, Abe K, Beliuskina O, Cha S, Chae K, Cherubini S, Figuera P, Ge Z, Gulino M, Hu J, Inoue A, Iwasa N, Kim A, Kim D, Kiss G, Kubono S, La Commara M, Lattuada M, Lee E, Moon J, Palmerini S, Parascandolo C, Park S, Phong VH, Pierroutsakou D, Pizzone R, Rapisarda G, Romano S, Spitaleri C, Tang X, Trippella O, Tumino A, Zhang N, Lam Y, Heger A, Jacobs A, Xu S, Ma S, Ru L, Liu E, Liu T, Hamill C, St J. Murphy A, Su J, Fang X, Kwag M, Duy N, Uyen N, Kim D, Liang J, Psaltis A, Sferrazza M, Johnston Z, Li Y. Experimental studies on astrophysical reactions at the low-energy RI beam separator CRIB. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202226003003] [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: 11/14/2022] Open
Abstract
Experimental studies on astrophysical reactions involving radioactive isotopes (RI) often accompany technical challenges. Studies on such nuclear reactions have been conducted at the low-energy RI beam separator CRIB, operated by Center for Nuclear Study, the University of Tokyo. We discuss two cases of astrophysical reaction studies at CRIB; one is for the 7Be+n reactions which may affect the primordial 7Li abundance in the Big-Bang nucleosynthesis, and the other is for the 22Mg(α, p) reaction relevantin X-raybursts.
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10
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Hu J, Yamaguchi H, Lam YH, Heger A, Kahl D, Jacobs AM, Johnston Z, Xu SW, Zhang NT, Ma SB, Ru LH, Liu EQ, Liu T, Hayakawa S, Yang L, Shimizu H, Hamill CB, Murphy ASJ, Su J, Fang X, Chae KY, Kwag MS, Cha SM, Duy NN, Uyen NK, Kim DH, Pizzone RG, La Cognata M, Cherubini S, Romano S, Tumino A, Liang J, Psaltis A, Sferrazza M, Kim D, Li YY, Kubono S. Advancement of Photospheric Radius Expansion and Clocked Type-I X-Ray Burst Models with the New ^{22}Mg(α,p)^{25}Al Reaction Rate Determined at the Gamow Energy. Phys Rev Lett 2021; 127:172701. [PMID: 34739292 DOI: 10.1103/physrevlett.127.172701] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 12/22/2020] [Accepted: 08/05/2021] [Indexed: 06/13/2023]
Abstract
We report the first (in)elastic scattering measurement of ^{25}Al+p with the capability to select and measure in a broad energy range the proton resonances in ^{26}Si contributing to the ^{22}Mg(α,p) reaction at type I x-ray burst energies. We measured spin-parities of four resonances above the α threshold of ^{26}Si that are found to strongly impact the ^{22}Mg(α,p) rate. The new rate advances a state-of-the-art model to remarkably reproduce light curves of the GS 1826-24 clocked burster with mean deviation <9% and permits us to discover a strong correlation between the He abundance in the accreting envelope of the photospheric radius expansion burster and the dominance of ^{22}Mg(α,p) branch.
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Affiliation(s)
- J Hu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - H Yamaguchi
- Center for Nuclear Study(CNS), the University of Tokyo, RIKEN campus, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
| | - Y H Lam
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - A Heger
- School of Physics and Astronomy, Monash University, Victoria 3800, Australia
- OzGrav-Monash-Monash Centre for Astrophysics, School of Physics and Astronomy, Monash University, Vic 3800, Australia
- Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), Australia
- The Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - D Kahl
- Extreme Light Infrastructure - Nuclear Physics, IFIN-HH, 077125 Bucharest-Măgurele, Romania
- SUPA, School of Physics & Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
| | - A M Jacobs
- The Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - Z Johnston
- The Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - S W Xu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - N T Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - S B Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - L H Ru
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - E Q Liu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - T Liu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - S Hayakawa
- Center for Nuclear Study(CNS), the University of Tokyo, RIKEN campus, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - L Yang
- Center for Nuclear Study(CNS), the University of Tokyo, RIKEN campus, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Shimizu
- Center for Nuclear Study(CNS), the University of Tokyo, RIKEN campus, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - C B Hamill
- SUPA, School of Physics & Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
| | - A St J Murphy
- SUPA, School of Physics & Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
| | - J Su
- College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China
| | - X Fang
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, Guangdong, China
| | - K Y Chae
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
| | - M S Kwag
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
| | - S M Cha
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
| | - N N Duy
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
| | - N K Uyen
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
| | - D H Kim
- Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
| | - R G Pizzone
- Laboratori Nazionali del Sud-INFN, Via S. Sofia 62, Catania 95123, Italy
| | - M La Cognata
- Laboratori Nazionali del Sud-INFN, Via S. Sofia 62, Catania 95123, Italy
| | - S Cherubini
- Laboratori Nazionali del Sud-INFN, Via S. Sofia 62, Catania 95123, Italy
| | - S Romano
- Laboratori Nazionali del Sud-INFN, Via S. Sofia 62, Catania 95123, Italy
- Dipartimento di Fisica e Astronomia "Ettore Majorana"-Università degli Studi di Catania, Via. Sofia, 64 95123 Catania, Italy
- Centro Siciliano di Fisica Nucleare e Struttura della Materia (CSFNSM), Via. Sofia, 64 95123 Catania, Italy
| | - A Tumino
- Laboratori Nazionali del Sud-INFN, Via S. Sofia 62, Catania 95123, Italy
- Facoltà di Ingegneria e Architettura, Università degli Studi di Enna "Kore," Enna 94100, Italy
| | - J Liang
- Department of Physics & Astronomy, McMaster University, Ontario L8S 4M1, Canada
| | - A Psaltis
- Department of Physics & Astronomy, McMaster University, Ontario L8S 4M1, Canada
| | - M Sferrazza
- Département de Physique, Université Libre de Bruxelles, Bruxelles B-1050, Belgium
| | - D Kim
- Department of Physics, Ewha Womans University, Seoul 03760, Korea
| | - Y Y Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - S Kubono
- Center for Nuclear Study(CNS), the University of Tokyo, RIKEN campus, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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11
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Tadano W, Tanabe E, Stellhorn JR, Komaguchi K, Takeuchi M, Hayakawa S. Feasibility Studies of X-Ray Computed Tomography for Forensic Examination of Single Fibers. ANAL SCI 2021; 37:1401-1406. [PMID: 33746141 DOI: 10.2116/analsci.21p031] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Non-destructive observations of cross-sectional shapes of acrylic single fibers using X-ray computed tomography (CT) were performed. A commercial X-ray CT apparatus (Rigaku nano3DX) was employed because of its micrometer-scale spatial resolution and remarkable image contrast for soft matter. We assessed two types of sample support, a paraffin strip and a nylon string, for single fiber samples in terms of easy handling and sample recovery. Fixed individual single fibers were loaded into a narrow polyimide tube in both cases, and the tube ensured that the sample remained in the field of view during the CT measurements. In both cases, the cross-sectional shapes of individual single fibers could be distinguished, with a circular shape for one sample and a triangular shape for the other. However, the support using a nylon string was found to be more suitable for further analysis. The cross-sectional profile of the obtained tomographic image showed a clear difference between polyimide and nylon. The intensity ratio or the image contrast corresponded to that of the local densities. It was also found that the effect of the artifact appeared at around the boundaries of the objects, but the local density could still be utilized for examining individual single fibers.
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Affiliation(s)
- Wataru Tadano
- Forensic Science Laboratory, Hiroshima Prefectural Police H.Q.,Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University
| | - Eishi Tanabe
- West Region Industrial Research Center, Hiroshima Prefectural Technology Research Institute
| | - Jens R Stellhorn
- Department of Applied Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University
| | - Kenji Komaguchi
- Department of Applied Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University
| | - Masaru Takeuchi
- Forensic Science Laboratory, Hiroshima Prefectural Police H.Q
| | - Shinjiro Hayakawa
- Department of Applied Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University
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12
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Goda S, Hayakawa S, Karakawa S, Okada S, Kawaguchi H, Kobayashi M. Possible involvement of regulatory T cell abnormalities and variational usage of TCR repertoire in children with autoimmune neutropenia. Clin Exp Immunol 2020; 204:1-13. [PMID: 33289074 DOI: 10.1111/cei.13559] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 11/21/2020] [Accepted: 11/23/2020] [Indexed: 01/16/2023] Open
Abstract
Autoimmune neutropenia (AIN) in childhood is characterized by chronic neutropenia and positivity for anti-neutrophil antibodies, resulting in the excessive destruction of neutrophils. In this study, we investigated the involvement of regulatory T cells (Tregs ) in the pathogenesis of AIN in childhood. Tregs have been classified into three subpopulations based on the expressions of CD45RA and forkhead box protein 3 (FoxP3): resting Tregs , activated Tregs and non-suppressive Tregs . The frequency of activated Tregs (CD4+ CD25+ FoxP3high CD45RA- T cells) as well as that of total Tregs (CD4+ CD25+ FoxP3+ T cells) in peripheral blood was significantly decreased in patients with AIN. Analysis of the T cell receptor (TCR)-Vβ repertoire of CD4+ T cells revealed skewed usages in patients with AIN compared with that observed in age-matched control subjects. Regarding T cell subsets, the use of four of 24 TCR-Vβ families in Tregs and one in conventional T cells were increased in patients with AIN. The number of patients with AIN who showed skewed usages of TCR-Vβ family in conventional and Tregs was significantly higher than that reported in control subjects. When the preference between Tregs and conventional T cells in each TCR-Vβ family was individually compared, different use was prominently observed in the TCR-Vβ 9 family in patients with AIN. These results suggest that the quantitative abnormalities of Tregs and the skew of the TCR-Vβ repertoire in CD4+ T cells, including Tregs and conventional T cells, may be related to autoantibody production through a human neutrophil antigen-reactive T cell clone.
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Affiliation(s)
- S Goda
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - S Hayakawa
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - S Karakawa
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - S Okada
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - H Kawaguchi
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - M Kobayashi
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
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13
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Karasawa K, Kitou S, Machitori Y, Hayakawa S, Ito K, Ogawa H, Shimizuguchi T, Taguchi K, Shibata Y. Accelerated Hypofractionated Radiation Therapy for the Central and Ultracentral Tumors of the Lung – Analysis of Doses to the Organs at Risk. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1244] [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: 11/15/2022]
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14
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Hayakawa S, Kaneda A, Mori T, Munoz-Noval A, Mineoi S, Sumida H. Ti K-edge XAFS investigation of lithium migration in lithium titanium oxide anode material under charge and discharge cycle. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2018.12.030] [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: 10/27/2022]
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15
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Nishiwaki Y, Honda S, Yamato T, Kondo R, Kaneda A, Hayakawa S. Nondestructive Differentiation of Polyester Single White Fibers Using Synchrotron Radiation Microbeam X‐ray Fluorescence Spectrometry with Vertical Focusing. J Forensic Sci 2020; 65:1474-1479. [DOI: 10.1111/1556-4029.14481] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/21/2020] [Accepted: 05/21/2020] [Indexed: 11/28/2022]
Affiliation(s)
- Yoshinori Nishiwaki
- Faculty of Education Kochi University 2‐5‐1 Akebono Kochi Kochi780‐8520 Japan
| | - Sadao Honda
- Research & Utilization Division Japan Synchrotron Radiation Research Institute SPring‐8, 1‐1‐1 Kohto Sayo Hyogo679‐5198 Japan
| | - Takuma Yamato
- Department of Applied Chemistry Graduate School of Engineering Hiroshima University 1‐4‐1 Kagamiyama Higashi‐Hiroshima Hiroshima739‐8527 Japan
| | - Ryosuke Kondo
- Department of Applied Chemistry Graduate School of Engineering Hiroshima University 1‐4‐1 Kagamiyama Higashi‐Hiroshima Hiroshima739‐8527 Japan
| | - Atsunori Kaneda
- Department of Applied Chemistry Graduate School of Engineering Hiroshima University 1‐4‐1 Kagamiyama Higashi‐Hiroshima Hiroshima739‐8527 Japan
| | - Shinjiro Hayakawa
- Department of Applied Chemistry Graduate School of Engineering Hiroshima University 1‐4‐1 Kagamiyama Higashi‐Hiroshima Hiroshima739‐8527 Japan
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16
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Hayakawa S, Kato R, Katsumata H. "New Horizons in Analytical Sciences of Functional Materials". ANAL SCI 2020; 36:3. [PMID: 31932532 DOI: 10.2116/analsci.ge2001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Affiliation(s)
| | - Ryo Kato
- Cooperative Research Facility Center, Toyohashi University of Technology, Japan
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17
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Oliva AA, Lamia L, Guardo GL, Spitaleri C, Cherubini S, Cvetinovic A, D’Agata G, de Sereville N, Pietro AD, Figuera P, Gulino M, Hammache F, Hayakawa S, Indelicato I, Cognata ML, Commara ML, Lattuada D, Lattuada M, Manico G, Mazzocco M, Messina S, Palmerini S, Pizzone R, Pumo M, Rapisarda G, Romano S, Sergi M, Soic N, Spartà R, Tumino A. Study of the neutron induced reaction 17O(n,α)14C at astrophysical energies via the Trojan Horse Method. EPJ Web Conf 2020. [DOI: 10.1051/epjconf/202022702007] [Citation(s) in RCA: 2] [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: 11/14/2022] Open
Abstract
Neutron induced reactions are fundamental for the nucleosynthesis of elements in the universe. Indeed, to correctly study the reactions involved in the well-known s-process in stars, which produce about half of the elements beyond the iron peak, it is mandatory to know the neutron abundance available in those stars. The 17O(n, a)14C reaction is one of the so-called “neutron poisons” for the pro- cess and it could play an important role in the balance of the neutron abundance. The reaction is therefore investigated in the energy range of astrophysical inter- est between 0 and 350 keV in the center of mass by applying the Trojan Horse Method to the three body reaction 2H(17O, a14C)H.
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18
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Terada N, Kouge K, Komaguchi K, Hayakawa S, Tsutsumi H. Thermal Stability Change of Insoluble Sulfur by a Heat Treatment and Its Mechanism Study. ANAL SCI 2020; 36:75-79. [PMID: 31813896 DOI: 10.2116/analsci.19sap05] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 11/27/2019] [Indexed: 08/09/2023]
Abstract
Insoluble sulfur (IS), used as a vulcanizing reagent of rubber, is prepared by the thermal ring-opening polymerization of sulfur (S8). Enhancing its thermal stability and content ratio (yield) is important for the industrial production of IS. The post-heating process at a high temperature of 70 or 90°C of the mixture of IS and S8 enhanced the thermal stability of IS and reduced the yield of IS. Further, the process at 30°C enhanced its thermal stability and maintained its yield. Since the thermal stability of IS is considered to be closely related to the chain length of polymer sulfur, a method for determining the chain length of IS was investigated by quantifying the amount of electron spin of radicals from sulfur, estimated from electron spin resonance (ESR) measurements. We confirmed that the long-period post-heating process at 30°C induced high thermal stability without reducing the yield of IS due to growth of the sulfur polymer chains.
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Affiliation(s)
- Naoki Terada
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Ube, Yamaguchi, 755-8611, Japan.
- Sanshin Chemical Industry Co., 4-4-6 Minamihama, Yanai, Yamaguchi, 742-0023, Japan.
| | - Katsushige Kouge
- Sanshin Chemical Industry Co., 4-4-6 Minamihama, Yanai, Yamaguchi, 742-0023, Japan
| | - Kenji Komaguchi
- Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
| | - Shinjiro Hayakawa
- Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
| | - Hiromori Tsutsumi
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Ube, Yamaguchi, 755-8611, Japan.
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19
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Hayakawa S, Karasawa K, Fujisawa T, Ito K, Shibata Y, Shimizuguchi T, Nihei K. Neoadjuvant Chemoradiotherapy for Resectable and Borderline Resectable Pancreatic Cancer. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.2009] [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: 10/26/2022]
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20
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Shimizuguchi T, Nakajima Y, Miyake Y, Shibata Y, Taguchi K, Ogawa H, Hayakawa S, Ito K, Machitori Y, Nihei K, Karasawa K. Radiation Therapy and Risk of Herpes Zoster in General Cancer Patients: A Propensity Score Matched Analysis. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1302] [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: 11/27/2022]
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21
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Tsunoji N, Nishida H, Ide Y, Komaguchi K, Hayakawa S, Yagenji Y, Sadakane M, Sano T. Photocatalytic Activation of C–H Bonds by Spatially Controlled Chlorine and Titanium on the Silicate Layer. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01284] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nao Tsunoji
- Graduate School of Engineering, Department of Applied Chemistry, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
| | - Hidechika Nishida
- Graduate School of Engineering, Department of Applied Chemistry, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
| | - Yusuke Ide
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Kenji Komaguchi
- Graduate School of Engineering, Department of Applied Chemistry, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
| | - Shinjiro Hayakawa
- Graduate School of Engineering, Department of Applied Chemistry, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
| | - Yuya Yagenji
- Graduate School of Engineering, Department of Applied Chemistry, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
| | - Masahiro Sadakane
- Graduate School of Engineering, Department of Applied Chemistry, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
| | - Tsuneji Sano
- Graduate School of Engineering, Department of Applied Chemistry, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
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22
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Asaoka S, Dan T, Asano I, Hayakawa S, Takeda K. Identifying sulfur species adsorbed on particulate matters in exhaust gas emitted from various vessels. Chemosphere 2019; 223:399-405. [PMID: 30784746 DOI: 10.1016/j.chemosphere.2019.02.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 10/05/2018] [Revised: 02/10/2019] [Accepted: 02/14/2019] [Indexed: 06/09/2023]
Abstract
Ship fuels are highly associated with the emission of particulate matter and sulfur. Sulfur adsorbed on particulate matter in exhaust gases from fuels is generally considered to be sulfate. However, other chemical species of sulfur adsorbed on particulate matter in ship exhaust gases are not well known. The purpose of this study is to identify sulfur species adsorbed on particulate matter in ship exhaust gases using X-ray absorption fine structure. Particulate matter and soot samples were collected from a container carrier, a tugboat, an electric propulsion vessel, training vessels, and a marine engine, and sulfur species of particulate matter and soot were identified by X-ray absorption fine structure analysis. Sulfur emission adsorbed on particulate matter and sulfur species did not change between high and middle loads. In this study, sulfonate derived from fuel or oxidation of sulfide in fuel was identified in addition to sulfate. Total sulfur and sulfate concentrations in soot increased with increasing fuel sulfur content. The concentration of organosulfurorganosulfurs in soot such as thiophen and sulfonate, which originated mainly from fuel and engine oil, tended to increase with increasing fuel sulfur content.
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Affiliation(s)
- Satoshi Asaoka
- Research Center for Inland Seas, Kobe University, 5-1-1 Fukaeminami, Higashinada, Kobe, 658-0022, Japan.
| | - Tomohisa Dan
- Graduate School of Maritime Sciences, Kobe University, 5-1-1 Fukaeminami, Higashinada, Kobe, 658-0022, Japan
| | - Ichiro Asano
- Graduate School of Maritime Sciences, Kobe University, 5-1-1 Fukaeminami, Higashinada, Kobe, 658-0022, Japan
| | - Shinjiro Hayakawa
- Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan
| | - Kazuhiko Takeda
- Graduate School of Biosphere Science, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima, 739-8521, Japan
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23
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Hayakawa S, Kato R, Katsumata H. "New Horizons in Analytical Sciences of Functional Materials". ANAL SCI 2019; 35:357. [PMID: 30971633 DOI: 10.2116/analsci.call1904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | - Ryo Kato
- Cooperative Research Facility Center, Toyohashi University of Technology
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24
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Hayakawa S, Kato R, Katsumata H. "New Horizons in Analytical Sciences of Functional Materials". ANAL SCI 2019; 35:233. [PMID: 30853701 DOI: 10.2116/analsci.call1903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | - Ryo Kato
- Cooperative Research Facility Center, Toyohashi University of Technology
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25
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Kittigul L, Rupprom K, Che‐arsae M, Pombubpa K, Thongprachum A, Hayakawa S, Ushijima H. Occurrence of noroviruses in recycled water and sewage sludge: emergence of recombinant norovirus strains. J Appl Microbiol 2019; 126:1290-1301. [DOI: 10.1111/jam.14201] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 12/31/2018] [Accepted: 01/08/2019] [Indexed: 11/26/2022]
Affiliation(s)
- L. Kittigul
- Department of Microbiology Faculty of Public Health Mahidol University Bangkok Thailand
| | - K. Rupprom
- Department of Microbiology Faculty of Public Health Mahidol University Bangkok Thailand
| | - M. Che‐arsae
- Department of Microbiology Faculty of Public Health Mahidol University Bangkok Thailand
| | - K. Pombubpa
- Department of Microbiology Faculty of Public Health Mahidol University Bangkok Thailand
| | - A. Thongprachum
- Faculty of Public Health Chiang Mai University Chiang Mai Thailand
| | - S. Hayakawa
- Division of Microbiology Department of Pathology and Microbiology Nihon University School of Medicine Tokyo Japan
| | - H. Ushijima
- Division of Microbiology Department of Pathology and Microbiology Nihon University School of Medicine Tokyo Japan
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26
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Muñoz-Noval Á, Fukami K, Koyama A, Kuruma T, Hayakawa S. In situ semi-quantitative analysis of zinc dissolution within nanoporous silicon by X-ray absorption fine-structure spectroscopy employing an X-ray compatible cell. J Synchrotron Radiat 2019; 26:119-123. [PMID: 30655476 DOI: 10.1107/s1600577518014789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 10/19/2018] [Indexed: 06/09/2023]
Abstract
The in situ study of the discharge process in a zinc-based half-cell employing a porous electrode as a structural scaffold is reported. The in situ characterization has been performed by synchrotron X-ray absorption fine-structure spectroscopy and, for this purpose, an inexpensive, simple and versatile electrochemical cell compatible with X-ray experiments has been designed and described. The experimental results reported here have been employed to semi-quantify the dissolved and undissolved zinc species during the discharge, allowing the cell feasibility to be tested and to better understand the functioning of the zinc half-cell based on porous electrodes.
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Affiliation(s)
- Álvaro Muñoz-Noval
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Hiroshima 739-8527, Japan
| | - Kazuhiro Fukami
- Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
| | - Akira Koyama
- Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
| | - Takuya Kuruma
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Hiroshima 739-8527, Japan
| | - Shinjiro Hayakawa
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Hiroshima 739-8527, Japan
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27
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Asaoka S, Umehara A, Otani S, Fujii N, Okuda T, Nakai S, Nishijima W, Takeuchi K, Shibata H, Jadoon WA, Hayakawa S. Spatial distribution of hydrogen sulfide and sulfur species in coastal marine sediments Hiroshima Bay, Japan. Mar Pollut Bull 2018; 133:891-899. [PMID: 30041392 DOI: 10.1016/j.marpolbul.2018.06.042] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 06/06/2018] [Accepted: 06/15/2018] [Indexed: 06/08/2023]
Abstract
This study aims to reveal spatial distribution of hydrogen sulfide and sulfur species in marine sediments in Hiroshima Bay, Japan, by direct analyses using a combination of detection tubes and X-ray absorption fine structure spectroscopy. In summer and autumn, the hydrogen sulfide concentration ranged from <0.1 to 4 mg-S L-1. In this study, only hydrogen sulfide was observed in autumn and at two stations in summer. In contrast, some earlier studies reported in all seasons in Hiroshima Bay the presence of acid volatile sulfide, which is used as a proxy of sulfide content. The sulfur species in sediments were mainly identified as sulfate, thiosulfate, elemental sulfur, and pyrite. Thiosulfate was a minor component compared to the other sulfur species. The formation of pyrite and sulfur derived from hydrogen sulfide oxidation played an important role in the scavenging of hydrogen sulfide.
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Affiliation(s)
- Satoshi Asaoka
- Research Center for Inland Seas, Kobe University, 5-1-1 Fukaeminami, Higashinada, Kobe 658-0022, Japan.
| | - Akira Umehara
- Environmental Research and Management Center, Hiroshima University, 1-5-3, Kagamiyama, Higashihiroshima, Hiroshima 739-8513, Japan
| | - Sosuke Otani
- Department of Technological Systems, Osaka Prefecture University College of Technology, 26-12, Saiwaicho, Neyagawa, Osaka 572-8572, Japan
| | - Naoki Fujii
- Institute of Lowland and Marine Research, Saga University, 1, Honjyo, Saga 840-8502, Japan
| | - Tetsuji Okuda
- Faculty of Science & Technology, Ryukoku University, 1-5 Yokotani, Setaooe, Ootsu, Shiga 520-2194, Japan
| | - Satoshi Nakai
- Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
| | - Wataru Nishijima
- Environmental Research and Management Center, Hiroshima University, 1-5-3, Kagamiyama, Higashihiroshima, Hiroshima 739-8513, Japan
| | - Koji Takeuchi
- National Institute of Technology, Hiroshima College, 4272-1, Higashino, Oosakikamishima, Toyota, Hiroshima 725-0231, Japan
| | - Hiroshi Shibata
- National Institute of Technology, Hiroshima College, 4272-1, Higashino, Oosakikamishima, Toyota, Hiroshima 725-0231, Japan
| | - Waqar Azeem Jadoon
- Research Center for Inland Seas, Kobe University, 5-1-1 Fukaeminami, Higashinada, Kobe 658-0022, Japan
| | - Shinjiro Hayakawa
- Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
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28
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Tsunoji N, Opanasenko MV, Kubů M, Čejka J, Nishida H, Hayakawa S, Ide Y, Sadakane M, Sano T. Cover Feature: Highly Active Layered Titanosilicate Catalyst with High Surface Density of Isolated Titanium on the Accessible Interlayer Surface (ChemCatChem 12/2018). ChemCatChem 2018. [DOI: 10.1002/cctc.201800905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nao Tsunoji
- Department of Applied Chemistry; Graduate School of Engineering; Hiroshima University; Higashi-Hiroshima 739-8527 Japan
| | - Maksym V. Opanasenko
- J. Heyrovský Institute of Physical Chemistry; Czech Academy of Sciences; 182 23 Prague 8 Czech Republic
| | - Martin Kubů
- J. Heyrovský Institute of Physical Chemistry; Czech Academy of Sciences; 182 23 Prague 8 Czech Republic
| | - Jiří Čejka
- J. Heyrovský Institute of Physical Chemistry; Czech Academy of Sciences; 182 23 Prague 8 Czech Republic
| | - Hidechika Nishida
- Department of Applied Chemistry; Graduate School of Engineering; Hiroshima University; Higashi-Hiroshima 739-8527 Japan
| | - Shinjiro Hayakawa
- Department of Applied Chemistry; Graduate School of Engineering; Hiroshima University; Higashi-Hiroshima 739-8527 Japan
| | - Yusuke Ide
- International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba 305-0044 Japan
| | - Masahiro Sadakane
- Department of Applied Chemistry; Graduate School of Engineering; Hiroshima University; Higashi-Hiroshima 739-8527 Japan
| | - Tsuneji Sano
- Department of Applied Chemistry; Graduate School of Engineering; Hiroshima University; Higashi-Hiroshima 739-8527 Japan
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Muñoz Noval Á, Nishio D, Kuruma T, Hayakawa S. Coordination and structure of Ca(II)-acetate complexes in aqueous solution studied by a combination of Raman and XAFS spectroscopies. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.02.075] [Citation(s) in RCA: 1] [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: 10/18/2022]
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30
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Tsunoji N, Opanasenko MV, Kubů M, Čejka J, Nishida H, Hayakawa S, Ide Y, Sadakane M, Sano T. Highly Active Layered Titanosilicate Catalyst with High Surface Density of Isolated Titanium on the Accessible Interlayer Surface. ChemCatChem 2018. [DOI: 10.1002/cctc.201800413] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nao Tsunoji
- Department of Applied Chemistry; Graduate School of Engineering; Hiroshima University; Higashi-Hiroshima 739-8527 Japan
| | - Maksym V. Opanasenko
- J. Heyrovský Institute of Physical Chemistry; Czech Academy of Sciences; 182 23 Prague 8 Czech Republic
| | - Martin Kubů
- J. Heyrovský Institute of Physical Chemistry; Czech Academy of Sciences; 182 23 Prague 8 Czech Republic
| | - Jiří Čejka
- J. Heyrovský Institute of Physical Chemistry; Czech Academy of Sciences; 182 23 Prague 8 Czech Republic
| | - Hidechika Nishida
- Department of Applied Chemistry; Graduate School of Engineering; Hiroshima University; Higashi-Hiroshima 739-8527 Japan
| | - Shinjiro Hayakawa
- Department of Applied Chemistry; Graduate School of Engineering; Hiroshima University; Higashi-Hiroshima 739-8527 Japan
| | - Yusuke Ide
- International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba 305-0044 Japan
| | - Masahiro Sadakane
- Department of Applied Chemistry; Graduate School of Engineering; Hiroshima University; Higashi-Hiroshima 739-8527 Japan
| | - Tsuneji Sano
- Department of Applied Chemistry; Graduate School of Engineering; Hiroshima University; Higashi-Hiroshima 739-8527 Japan
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Hayakawa S, Sato K, Sakai M, Kutara K, Asano K, Watari T. CT cholangiography in dogs with gallbladder mucocoele. J Small Anim Pract 2018; 59:490-495. [PMID: 29603237 DOI: 10.1111/jsap.12832] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 01/18/2018] [Accepted: 01/22/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVES To summarise CT cholangiography findings in dogs with gallbladder mucocoele. MATERIALS AND METHODS Each of 10 dogs with gallbladder mucocoele underwent CT cholangiography using meglumine iotroxate before cholecystectomy. The following structures of the biliary system were evaluated: the right and left hepatic ducts, common hepatic duct, cystic duct, common bile duct and gallbladder. RESULTS The hepatic duct, cystic duct, common bile duct and gallbladder were imaged by contrast-enhanced CT cholangiography. The passage of the contrast medium through the bile duct into the duodenum was visible in nine dogs. The curved planar reformation images of two dogs showed they had filling defects in the bile duct system. In one dog with hyperbilirubinaemia due to chronic hepatitis, the bile duct system was not completely contrast-enhanced. Surgical exploration revealed no evidence of common bile duct obstruction in any dog. CLINICAL SIGNIFICANCE CT cholangiography delineates the structural characteristics of the biliary system and partially estimates its patency in dogs with gallbladder mucocoele. Therefore this procedure may be useful as a preoperative screen of the bile duct system in dogs with gallbladder mucocoele.
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Affiliation(s)
- S Hayakawa
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - K Sato
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - M Sakai
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - K Kutara
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - K Asano
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - T Watari
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
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Yang SB, Ahn JK, Akazawa Y, Aoki K, Chiga N, Ekawa H, Evtoukhovitch P, Feliciello A, Fujita M, Hasegawa S, Hayakawa S, Hayakawa T, Honda R, Hosomi K, Hwang SH, Ichige N, Ichikawa Y, Ikeda M, Imai K, Ishimoto S, Kanatsuki S, Kim SH, Kinbara S, Kobayashi K, Koike T, Lee JY, Miwa K, Moon TJ, Nagae T, Nakada Y, Nakagawa M, Ogura Y, Sakaguchi A, Sako H, Sasaki Y, Sato S, Shirotori K, Sugimura H, Suto S, Suzuki S, Takahashi T, Tamura H, Tanida K, Togawa Y, Tsamalaidze Z, Ukai M, Wang TF, Yamamoto TO. First Determination of the Level Structure of an sd-Shell Hypernucleus, _{Λ}^{19}F. Phys Rev Lett 2018; 120:132505. [PMID: 29694189 DOI: 10.1103/physrevlett.120.132505] [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: 12/20/2017] [Revised: 02/15/2018] [Indexed: 06/08/2023]
Abstract
We report on the first observation of γ rays emitted from an sd-shell hypernucleus, _{Λ}^{19}F. The energy spacing between the ground state doublet, 1/2^{+} and 3/2^{+} states, of _{Λ}^{19}F is determined to be 315.5±0.4(stat)_{-0.5}^{+0.6}(syst) keV by measuring the γ-ray energy of the M1(3/2^{+}→1/2^{+}) transition. In addition, three γ-ray peaks are observed and assigned as E2(5/2^{+}→1/2^{+}), E1(1/2^{-}→1/2^{+}), and E1(1/2^{-}→3/2^{+}) transitions. The excitation energies of the 5/2^{+} and 1/2^{-} states are determined to be 895.2±0.3(stat)±0.5(syst) and 1265.6±1.2(stat)_{-0.5}^{+0.7}(syst) keV, respectively. It is found that the ground state doublet spacing is well described by theoretical models based on existing s- and p-shell hypernuclear data.
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Affiliation(s)
- S B Yang
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - J K Ahn
- Department of Physics, Korea University, Seoul 02841, Korea
| | - Y Akazawa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - K Aoki
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - N Chiga
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - H Ekawa
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - P Evtoukhovitch
- Joint Institute for Nuclear Research, Dubna, Moscow Region 141980, Russia
| | - A Feliciello
- INFN, Sezione di Torino, via P. Giuria 1, 10125 Torino, Italy
| | - M Fujita
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - S Hasegawa
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - S Hayakawa
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Hayakawa
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - R Honda
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - K Hosomi
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - S H Hwang
- Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, Korea
| | - N Ichige
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - Y Ichikawa
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - M Ikeda
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - K Imai
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - S Ishimoto
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - S Kanatsuki
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - S H Kim
- Department of Physics, Korea University, Seoul 02841, Korea
| | - S Kinbara
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - K Kobayashi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Koike
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - J Y Lee
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
| | - K Miwa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - T J Moon
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
| | - T Nagae
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - Y Nakada
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - M Nakagawa
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Y Ogura
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - A Sakaguchi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - H Sako
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - Y Sasaki
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - S Sato
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - K Shirotori
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - H Sugimura
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - S Suto
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - S Suzuki
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - T Takahashi
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - H Tamura
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - K Tanida
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - Y Togawa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - Z Tsamalaidze
- Joint Institute for Nuclear Research, Dubna, Moscow Region 141980, Russia
| | - M Ukai
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - T F Wang
- Research Center of Nuclear Science and Technology (RCNST) and School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - T O Yamamoto
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
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Abstract
Besides chemically interacting with hard tooth tissue, acidic functional monomers of self-etch adhesives should etch the prepared tooth surface to dissolve the smear layer and to provide surface micro-retention. Although the etching efficacy of functional monomers is commonly determined in terms of pH, the pH of adhesives cannot accurately be measured. Better is to measure the hydroxyapatite (HAp)-dissolving capacity, also considering that functional monomers may form monomer-Ca salts. Here, the etching efficacy of 6 functional monomers (GPDM, phenyl-P, MTEGP, 4-META, 6-MHP and 10-MDP) was investigated. Solutions containing 15 wt% monomer, 45 wt% ethanol, and 40 wt% water were prepared. Initially, we observed enamel surfaces exposed to monomer solution by scanning electron microscopy (SEM). X-ray diffraction (XRD) was employed to detect monomer-Ca salt formation. Phenyl-P exhibited a strong etching effect, while 10-MDP-treated enamel showed substance deposition, which was identified by XRD as 10-MDP-Ca salt. To confirm these SEM/XRD findings, we determined the etching efficacy of functional monomers by measuring both the concentration of Ca released from HAp using inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and the amount of monomer-Ca salt formation using 31P magic-angle spinning (MAS) nuclear magnetic resonance (NMR). ICP-AES revealed that the highest Ca concentration was produced by phenyl-P and the lowest Ca concentration, almost equally, by 4-META and 10-MDP. Only 10-MDP formed 10-MDP-Ca salts, indicating that 10-MDP released more Ca from HAp than was measured by ICP-AES. Part of the released Ca was consumed to form 10-MDP-Ca salts. It is concluded that the repeatedly reported higher bonding effectiveness of 10-MDP-based adhesives must not only be attributed to the more intense chemical bonding of 10-MDP but also to its higher etching potential, a combination the other functional monomers investigated lack.
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Affiliation(s)
- K Yoshihara
- 1 Center for Innovative Clinical Medicine, Okayama University Hospital, Okayama, Japan
| | - S Hayakawa
- 2 Biomaterials Laboratory, Graduate School of Natural Science and Technology, Okayama University, Kita-ku, Okayama, Japan
| | - N Nagaoka
- 3 Advanced Research Center for Oral and Craniofacial Sciences, Okayama University Dental School, Kita-ku, Okayama, Japan
| | - T Okihara
- 4 Division of Chemical and Biological Technology, Graduate School of Natural Science and Technology, Okayama University, Kita-ku, Okayama, Japan
| | - Y Yoshida
- 5 Department of Biomaterials and Bioengineering, Faculty of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - B Van Meerbeek
- 6 KU Leuven (University of Leuven), Department of Oral Health Research, BIOMAT & University Hospitals Leuven, Dentistry, Leuven, Belgium
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Sato K, Sakai M, Hayakawa S, Sakamoto Y, Kagawa Y, Kutara K, Teshima K, Asano K, Watari T. Gallbladder Agenesis in 17 Dogs: 2006-2016. J Vet Intern Med 2018; 32:188-194. [PMID: 29377355 PMCID: PMC5787189 DOI: 10.1111/jvim.15034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 11/18/2017] [Accepted: 11/30/2017] [Indexed: 11/30/2022] Open
Abstract
Background Gallbladder agenesis (GBA) is extremely rare in dogs. Hypothesis/Objectives To describe the history, clinical signs, diagnosis, treatment, and outcomes of dogs with GBA. Animals Seventeen client‐owned dogs with GBA. Methods Medical records from 2006 through 2016 were retrospectively reviewed. Dogs were included when GBA was suspected on abdominal ultrasonography and confirmed by gross evaluation. Signalment, clinical signs, clinicopathological data, diagnostic imaging, histopathology, treatment, and outcome were recorded. Results Dogs were of 6 different breeds, and Chihuahuas (10 of 17) were most common. Median age at presentation was 1.9 (range, 0.7–7.4) years. Clinical signs included vomiting (5 of 17), anorexia (2 of 17), ascites (2 of 17), diarrhea (1 of 17), lethargy (1 of 17), and seizures (1 of 17). All dogs had increased serum activity of at least 1 liver enzyme, most commonly alanine aminotransferase (15 of 17). Fifteen dogs underwent computed tomography (CT) cholangiography; common bile duct (CBD) dilatation was confirmed in 12, without evidence of bile duct obstruction. Gross evaluation confirmed malformation of the liver lobes in 14 of 17 dogs and acquired portosystemic collaterals in 5 of 17. Ductal plate malformation was confirmed histologically in 16 of 17 dogs. During follow‐up (range, 4–3,379 days), 16 of 17 dogs remained alive. Conclusions and Clinical Importance Dogs with GBA exhibit clinicopathological signs of hepatobiliary injury and hepatic histopathological changes consistent with a ductal plate abnormality. Computed tomography cholangiography was superior to ultrasound examination in identifying accompanying nonobstructive CBD distention. Computed tomography cholangiography combined with laparoscopic liver biopsy is the preferable approach to characterize the full disease spectrum accompanying GBA in dogs.
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Affiliation(s)
- K Sato
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Kanagawa, Japan
| | - M Sakai
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Kanagawa, Japan
| | - S Hayakawa
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Kanagawa, Japan
| | - Y Sakamoto
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Kanagawa, Japan
| | - Y Kagawa
- North Lab, Sapporo, Hokkaido, Japan
| | - K Kutara
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Kanagawa, Japan
| | - K Teshima
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Kanagawa, Japan
| | - K Asano
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Kanagawa, Japan
| | - T Watari
- Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Kanagawa, Japan
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Shimizu H, Kahl D, Yamaguchi H, Abe K, Beliuskina O, Cha SM, Chae KY, Chen AA, Ge Z, Hayakawa S, Imai N, Iwasa N, Kim A, Kim DH, Kim MJ, Kubono S, Kawag MS, Liang J, Moon JY, Nishimura S, Oka S, Park SY, Psaltis A, Teranishi T, Ueno Y, Yang L. Isomeric 26Al beam production with CRIB. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201818402013] [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: 11/14/2022] Open
Abstract
We performed an experiment to measure proton resonant elastic scattering of a mixed 26m,gAl beam with a thick target in inverse kinematics by using CNS RI beam sep-arator, located at RIKEN Nishina Center. It aimed to search for strong proton resonances and determine level properties of low spin-parity states in 27Si. Diagnosis of the 26mAl purity of the beam by annihilation radiation are discussed.
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Yamaguchi H, Hayakawa S, Yang L, Shimizu H, Kahl D. Direct measurements and detection techniques with low-energy RIBs. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201818401017] [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: 11/14/2022] Open
Abstract
Astrophysical reactions involving radioactive isotopes (RI) are of importance for the stellar energy generation and nucleosynthesis especially in high-temperature astrophysical sites, such as X-ray bursts, core-collapse supernovae, and supermassive metalpoor stars. In spite of the essential diffculties in the experimental evaluation of those reaction rates, there are several successful approaches to study them, owing to the recent technical developments in the beam production, measurement method, and detectors. Among them, the measurements of α resonant scattering and (α, p) reactions using the thick-target method in inverse kinematics are discussed. The experiments at the low-energy RI beam separator CRIB, operated by Center for Nuclear Study (CNS), the University of Tokyo, are introduced as examples for such studies.
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Shimizuguchi T, Nihei K, Ito K, Ogawa H, Kawamoto T, Kuramoto H, Hayakawa S, Fuse K, Shibata Y, Machitori Y, Fujii M, Karasawa K. Herpes Zoster Following Radiation Therapy: A Single-Institutional Epidemiological Analysis from Patient Database. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1833] [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: 11/25/2022]
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Hayakawa S, Ohno N, Okada S, Kobayashi M. Significant augmentation of regulatory T cell numbers occurs during the early neonatal period. Clin Exp Immunol 2017; 190:268-279. [PMID: 28677152 DOI: 10.1111/cei.13008] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2017] [Indexed: 01/13/2023] Open
Abstract
Regulatory T cells (Tregs ) control immune responses by suppressing various inflammatory cells. Tregs in newborn babies may play an important role in preventing excessive immune responses during their environmental change. We examined the number and phenotype of Tregs during the neonatal period in 49 newborn babies. Tregs were characterized by flow cytometry using cord blood (CB) and peripheral blood (PB) from the early (7-8 days after birth) and late (2-4 weeks after birth) neonatal periods. CD4+ forkhead box protein 3 (FoxP3+ ) T cells were classified into resting Tregs (CD45RA+ FoxP3low ), activated Tregs (CD45RA- FoxP3high ) and newly activated T cells (CD45RA- FoxP3low ). Compared with CB and PB during the late neonatal period, the percentage of Tregs and all Treg subpopulations in the CD4+ lymphocyte population were increased significantly during the early neonatal period. Furthermore, the proportion and absolute number of activated Tregs were increased markedly compared with other Treg subpopulations, such as resting Tregs and newly activated T cells (non-Tregs ), in the early neonatal period. Increased Tregs concomitantly expressed the suppressive molecule cytotoxic T lymphocyte antigen-4 (CTLA-4). The up-regulated expression of chemokine receptor 4 (CCR4) and down-regulated expression of CCR7 were also observed in expanded Tregs . When cord blood cells were cultured in vitro with CD3 monoclonal antibodies (mAb) for 5 days, CD4+ CD45RA- FoxP3high cells were increased significantly during the culture. Thus, the presence of increased activated Tregs in early neonates may play an important role in immunological regulation by suppressing excessive T cell activation caused by the immediate exposure to ubiquitous antigens after birth.
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Affiliation(s)
- S Hayakawa
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - N Ohno
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - S Okada
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - M Kobayashi
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
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Kimoto-Nira H, Moriya N, Hayakawa S, Kuramasu K, Ohmori H, Yamasaki S, Ogawa M. Effects of rare sugar D-allulose on acid production and probiotic activities of dairy lactic acid bacteria. J Dairy Sci 2017; 100:5936-5944. [DOI: 10.3168/jds.2016-12214] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 03/08/2017] [Indexed: 11/19/2022]
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40
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Nakagawa K, Suzuki K, Kondo M, Hayakawa S, Nakayama M. Electrosynthesis of Layered Organo-Manganese Dioxide Framework-Doped with Cobalt for Iodide Sensing. Langmuir 2017; 33:4647-4653. [PMID: 28464611 DOI: 10.1021/acs.langmuir.7b00419] [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] [Indexed: 06/07/2023]
Abstract
Aqueous Mn2+ ions were anodized at 70 °C with Co2+ in the presence of cationic surfactant, cetyltrimethylammonium (CTA). X-ray diffraction (XRD) analysis revealed that the deposited film possesses a layered structure of MnO2, the interlayer of which is occupied with the assembled CTA molecules. Inclusion of Co ions in the MnO2 film was evidenced by X-ray photoelectron spectroscopy (XPS). They were located in the MnO2 framework, not in the interlayer. The thus-obtained film, CTA-intercalated Co-framework-doped layered MnO2 (CTA/Co-MnO2), was applied as an electrochemical sensor toward iodide (I-), a hydrophobic anion. The organic phase between MnO2 layers could extract I- ions from solution, providing a better sensitivity than a film consisting of layered MnO2 with hydrated alkali metals. On the other hand, the Co-doped layers of MnO2 achieved faster electron transfer kinetics for the oxidation of I-, which resulted in a drastic reduction in response time compared to the nondoped CTA/MnO2.
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Affiliation(s)
- Kimiko Nakagawa
- Department of Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Yamaguchi University , 2-16-1 Tokiwadai, Ube 755-8611, Japan
| | - Kanon Suzuki
- Department of Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Yamaguchi University , 2-16-1 Tokiwadai, Ube 755-8611, Japan
| | - Misa Kondo
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University , 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
| | - Shinjiro Hayakawa
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University , 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
| | - Masaharu Nakayama
- Department of Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Yamaguchi University , 2-16-1 Tokiwadai, Ube 755-8611, Japan
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Asaoka S, Okamura H, Kim K, Hatanaka Y, Nakamoto K, Hino K, Oikawa T, Hayakawa S, Okuda T. Optimum reaction ratio of coal fly ash to blast furnace cement for effective removal of hydrogen sulfide. Chemosphere 2017; 168:384-389. [PMID: 27810538 DOI: 10.1016/j.chemosphere.2016.10.070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 05/25/2016] [Revised: 10/07/2016] [Accepted: 10/19/2016] [Indexed: 06/06/2023]
Abstract
Reducing hydrogen sulfide concentration in eutrophic marine sediments is crucial to maintaining healthy aquatic ecosystems. Managing fly ash, 750 million tons of which is generated annually throughout the world, is another serious environmental problem. In this study, we develop an approach that addresses both these issues by mixing coal fly ash from coal-fired power plants with blast furnace cement to remediate eutrophic sediments. The purpose of this study is to optimize the mixing ratio of coal fly ash and blast furnace cement to improve the rate of hydrogen sulfide removal based on scientific evidence obtained by removal experiments and XAFS, XRD, BET, and SEM images. In the case of 10 mg-S L-1 of hydrogen sulfide, the highest removal rate of hydrogen sulfide was observed for 87 wt% of coal fly ash due to decreased competition of adsorption between sulfide and hydroxyl ions. Whereas regarding 100 mg-S L-1, the hydrogen sulfide removal rate was the highest for 95 wt% of coal fly ash. However, for both concentrations, the removal rate obtained by 87 wt% and 95 wt% were statistically insignificant. The crushing strength of the mixture was over 1.2 N mm-2 when the coal fly ash mixing ratio was less than 95 wt%. Consequently, the mixing ratio of coal fly ash was optimized at 87 wt% in terms of achieving both high hydrogen sulfide removal rate and sufficient crushing strength.
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Affiliation(s)
- Satoshi Asaoka
- Research Center for Inland Seas, Kobe University, 5-1-1 Fukaeminami, Higashinada, Kobe, 658-0022, Japan.
| | - Hideo Okamura
- Research Center for Inland Seas, Kobe University, 5-1-1 Fukaeminami, Higashinada, Kobe, 658-0022, Japan
| | - Kyunghoi Kim
- College of Environmental and Marine Sciences and Technology, Pukyong National University, 45, Yongso-ro, Nam-Gu, Busan, 48513, South Korea
| | - Yuzuru Hatanaka
- Faculty of Maritime Sciences, Kobe University, 5-1-1 Fukaeminami, Higashinada, Kobe, 658-0022, Japan
| | - Kenji Nakamoto
- The Chugoku Electric Power Co., Inc., 4-33, Komachi,Naka-ku, Hiroshima, 730-8701, Japan
| | - Kazutoshi Hino
- The Chugoku Electric Power Co., Inc., 4-33, Komachi,Naka-ku, Hiroshima, 730-8701, Japan
| | - Takahito Oikawa
- The Chugoku Electric Power Co., Inc., 4-33, Komachi,Naka-ku, Hiroshima, 730-8701, Japan
| | - Shinjiro Hayakawa
- Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
| | - Tetsuji Okuda
- Faculty of Science & Technology, Ryukoku University, 1-5 Yokotani, Setaooe, Ootsu, Shiga, 520-2194, Japan
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Lamia L, Spitaleri C, Mazzocco M, Boiano A, Boiano C, Broggini C, Caciolli A, Depalo R, Di Pietro A, Figuera P, Galtarossa F, Guardo G, Gulino M, Hayakawa S, Kubono S, La Cognata M, La Commara M, La Rana G, Lattuada M, Menegazzo R, Pakou A, Parascandolo C, Piatti D, Pierroutsakou D, Pizzone R, Puglia S, Romano S, Rapisarda G, Sanchez-Benitez A, Sergi M, Sgouros O, Silva H, Soramel F, Soukeras V, Strano E, Torresi D, Trippella O, Tumino A, Yamaguchi H, Villante F, Zhang G. The Trojan Horse Method for nuclear astrophysics and its recent applications. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201716501032] [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: 11/15/2022] Open
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43
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D’Agata G, Pizzone RG, La Cognata M, Indelicato I, Spitaleri C, Blagus S, Cherubini S, Figuera P, Grassi L, Guardo GL, Gulino M, Hayakawa S, Kshetri R, Lamia L, Lattuada M, Mijatović T, Milin M, Miljanić Ð, Prepolec L, Rapisarda GG, Romano S, Sergi ML, Soić N, Tokić V, Tumino A, Uroić M. Nuclear reactions in AGB nucleosynthesis: the 19F( α, p) 22Ne at energies of astrophysical relevance. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201716501019] [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: 11/14/2022] Open
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44
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Yamaguchi H, Kahl D, Hayakawa S, Yang L, Shimizu H, Sakaguchi Y, Abe K, Nakao T, Suhara T, Iwasa N, Kim A, Kim D, Cha S, Kwag M, Lee J, Lee E, Chae K, Wakabayashi Y, Imai N, Kitamura N, Lee P, Moon J, Lee K, Akers C, Jung H, Duy N, Khiem L, Lee C, Hashimoto T, Kubono S, Kawabata T, Teranishi T, Kwon Y, Binh D. Nuclear astrophysics projects at the low-energy RI beam separator CRIB. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201716501056] [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: 11/14/2022] Open
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45
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Kahl D, Shimizu H, Yamaguchi H, Abe K, Beliuskina O, Cha SM, Chae KY, Chen AA, Ge Z, Hayakawa S, Imai N, Iwasa N, Kim A, Kim DH, Kim MJ, Kubono S, Kwag MS, Liang J, Moon JY, Nishimura S, Oka S, Park SY, Psaltis A, Teranishi T, Ueno Y, Yang L. Isomer beam elastic scattering: 26mAl(p, p) for astrophysics. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201716501030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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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46
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Hayakawa S, Hayashi Y, Okita T, Itakura M, Suzuki K, Kuriyama Y. Effects of stacking fault energies on the interaction between an edge dislocation and an 8.0-nm-diameter Frank loop of self-interstitial atoms. Nuclear Materials and Energy 2016. [DOI: 10.1016/j.nme.2016.10.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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47
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Muñoz-Noval Á, Fukami K, Koyama A, Gallach D, Hermida-Merino D, Portale G, Kitada A, Murase K, Abe T, Hayakawa S, Sakka T. Accelerated growth from amorphous clusters to metallic nanoparticles observed in electrochemical deposition of platinum within nanopores of porous silicon. Electrochem commun 2016. [DOI: 10.1016/j.elecom.2016.07.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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48
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Abstract
d-Allulose (Alu), a rare sugar, was applied to chicken breast sausage as a sucrose (Suc) substitute. The ratio (w/w) of Alu to Suc in sugar that was added to the sausage batter was 0/1 (A0S1), 3/7 (A3S7), 7/3 (A7S3), and 1/0 (A1S0). The total amount of Suc used was 2.5% of the weight of minced chicken breast meat. Substituting Suc with Alu did not affect water content, cooking loss, breaking stress, breaking strain, and modulus of elasticity of chicken breast sausage, but a 100% substitution with Alu caused a 10% decrease in viscosity and a 31% decrease in expressible water. A significant difference appeared in the rheological properties of elasticity, viscosity, and water-holding capacity of chicken breast sausage frozen-stored (-20°C) for 90 d. Particularly, the modulus of elasticity for A1S0 chicken breast sausage was 19% higher than that of the control A0S1 chicken breast sausage, suggesting that Alu appreciably reduced the deterioration in elasticity that is caused by long-term frozen storage of sausage. The quality improvement of frozen-stored chicken breast sausage demonstrates the feasibility and benefits of the application of Alu to frozen foods.
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Affiliation(s)
- M Hadipernata
- Department of Applied Bioresource Science, The United Graduate School of Agricultural Sciences, Ehime University (Affiliated University: Kagawa University), 2393 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0795, Japan Agency for Agricultural Research and Development, Indonesia Ministry of Agriculture, Jl. Tentara Pelajar 12, Bogor 16111, Indonesia
| | - M Ogawa
- Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, 2393 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0795, Japan
| | - S Hayakawa
- Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, 2393 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0795, Japan
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49
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Affiliation(s)
- Masashi Nakamura
- Department
of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 639-8527, Japan
| | - Yousuke Ooyama
- Department
of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 639-8527, Japan
| | - Shinjiro Hayakawa
- Department
of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 639-8527, Japan
| | - Makoto Nishino
- Analytical & Measuring Instruments Division, Shimadzu Corporation, 1, Nishinokyo-Kuwabaracho, Nakagyo-Ku, Kyoto 604-8511, Japan
| | - Joji Ohshita
- Department
of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 639-8527, Japan
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50
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Dias AG, Lopes MA, Santos JD, Afonso A, Tsuru K, Osaka A, Hayakawa S, Takashima S, Kurabayashi Y. In vivo Performance of Biodegradable Calcium Phosphate Glass Ceramics using the Rabbit Model: Histological and SEM Observation. J Biomater Appl 2016; 20:253-66. [PMID: 16364965 DOI: 10.1177/0885328206052466] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 12/30/2022]
Abstract
Two MK5 (45CaO-45P2O5-5MgO-5K2O, in mol%) and MT13 (45CaO-37P2O5-5MgO-13TiO2, in mol%) glasses are prepared in the meta- and pyrophosphate regions and crystallized to obtain MK5B and MT13B, respectively. MK5B was obtained by controlled crystallization, and MT13B by powder sintering. As a result of these heat treatment processes, the crystalline phases precipitated in the glassy matrix are KCa(PO3)3, β-Ca(PO3)2, β-Ca2P2O7and Ca4P6O19phases for MK5B and CaTi4(PO4)6, TiP2O7, α- and β-Ca2P2O7phases for MT13B. To assess the in vivo biological behavior of these glass ceramics, a mixed granulometry in the range 250-355 μm and 355-425 μm with a ratio of 1/1 was implanted for 2, 4, and 12 weeks in the tibiae of Japanese white rabbits. The results showed that the in vivo behavior was strongly affected by their solubility. All implanted materials, MK5B and MT13B, and β-tricalcium phosphate (β-TCP) as control material, showed signs of degradation in vivo. However, the levels of degradation were quite different throughout the implantation periods. The highest degradation was observed for MK5B glass ceramic and the lowest for MT13B with β-TCP in-between. All implanted materials allow for new bone formation in the bone defect area. At the longest implantation period (12 weeks), the MT13B and β-TCP materials were almost completely surrounded by new bone tissue, whereas MK5B showed some unfilled spaces. This behavior is discussed in terms of the high degradation observed in previous studies.
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Affiliation(s)
- A G Dias
- Instituto de Engenharia Biomédica, INEB, Laboratório de Biomateriais, Rua do Campo Alegre, 823, 4150-180 Porto, Portugal
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