1
|
Mitsuzawa K, Kumagai T, Uchida H, Shimizu T. Positional relationships between a tracheal diverticulum and the tracheal tube under general anesthesia: a single-center observational and simulation study. BMC Anesthesiol 2023; 23:386. [PMID: 38007426 PMCID: PMC10675875 DOI: 10.1186/s12871-023-02347-y] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 11/18/2023] [Indexed: 11/27/2023] Open
Abstract
BACKGROUND Incomplete sealing of tracheal diverticula by a tracheal tube cuff during positive-pressure ventilation causes barotrauma but the concrete possibility of incomplete sealing has not been indicated. We aimed to assess the possibility of incomplete sealing in a simulated situation of tracheal intubation for patients with tracheal diverticula with tube fixation where the tracheal tube's vocal cord guide overlaps with the patient's vocal cord. METHODS We retrospectively assessed the characteristics of tracheal diverticula based on thoracic computed tomography data in our institution from January 2018 to July 2020. Then, we assessed the structural parameters of three single-lumen tracheal tubes (Parker Flex-Tip [Parker Medical, Bridgewater, CT, USA], Portex Soft Seal [ICU Medical, San Clemente, CA, USA], and Shiley TaperGuard [Medtronic, Dublin, Ireland]; 6.0-8.0 mm inner diameter size) and simulated the positional relationships between tracheal diverticula and the tracheal tube during tracheal intubation where the vocal cord guide overlaps with the patient's vocal cord. We assessed each tube product's possibility of incompletely sealing tracheal diverticula and the possibility of unintended bronchial intubation. RESULTS In 5,854 patients, the prevalence of tracheal diverticula was 5.7%. The mean (SD) length from the vocal cord to the distal end of the tracheal diverticula was 52.2 (12.8) mm. Tracheal tubes with length from the distal end of the tracheal cuff to the vocal cord guide of ≥ 70 mm had a low risk of incompletely sealing tracheal diverticula (< 5%) and length from the distal end of the tube to the vocal cord guide of ≤ 95 mm had a low risk of unintended bronchial intubation (< 5%). No products in this study satisfied both outcomes. CONCLUSIONS Tube fixation, where the vocal cord guide overlaps with the patient's vocal cord, is associated with risk of incompletely sealing of tracheal diverticula depending on the tube's manufacturer and tube's inner diameter size, although it was not a high risk. The use of small inner diameter sized tube relative to patient's body size is high risk of incomplete sealing of tracheal diverticula. TRIAL REGISTRATION This trial was prospectively registered at University Hospital Medical Information Network (UMIN). CLINICAL TRIAL NUMBER AND REGISTRY URL UMIN000043317 (URL: https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000048055 ).
Collapse
Affiliation(s)
- Kunihiro Mitsuzawa
- Department of Anesthesiology and Resuscitology, Shinshu University School of Medicine, 3-1-1, Asahi, Matsumoto City, Nagano, 390-8621, Japan.
- Department of Anesthesiology, Nagano Prefectural Shinshu Medical Center, 1332, Suzaka City, Nagano, 382-8577, Japan.
| | - Tsukasa Kumagai
- Department of Anesthesiology, Nagano Prefectural Shinshu Medical Center, 1332, Suzaka City, Nagano, 382-8577, Japan
| | - Haruo Uchida
- Department of Anesthesiology, Nagano Prefectural Shinshu Medical Center, 1332, Suzaka City, Nagano, 382-8577, Japan
| | - Toshiyuki Shimizu
- Department of Anesthesiology, Nagano Prefectural Shinshu Medical Center, 1332, Suzaka City, Nagano, 382-8577, Japan
| |
Collapse
|
2
|
Miyamae T, Manabe Y, Sugihara T, Umezawa N, Yoshifuji H, Tamura N, Abe Y, Furuta S, Kato M, Kumagai T, Nakamura K, Nagafuchi H, Ishizaki J, Nakano N, Atsumi T, Karino K, Amano K, Kurasawa T, Ito S, Yoshimi R, Ogawa N, Banno S, Naniwa T, Ito S, Hara A, Hirahara S, Uchida HA, Onishi Y, Murakawa Y, Komagata Y, Nakaoka Y, Harigai M. POS0794 PREGNANCY AND CHILDBIRTH IN TAKAYASU ARTERITIS IN JAPAN – A NATIONWIDE RETROSPECTIVE STUDY. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.980] [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: 11/04/2022]
Abstract
BackgroundTakayasu arteritis (TAK), a granulomatous large vessel vasculitis, mainly involves the aorta and its proximal branches and commonly occurs in young females. However, studies of pregnancy in women with TAK are sparse and limited, probably due to the rarity of the disease.ObjectivesThe purpose of this study was to understand the status quo of medical treatments of the primary disease and outcomes of pregnancy in patients with TAK, and birth outcomes of the children in Japan.MethodsPatients with TAK who conceived after the onset of the disease and were managed at medical facilities participating in the Japan Research Committee of the Ministry of Health, Labour, and Welfare for Intractable Vasculitis (JPVAS) were retrospectively enrolled in this study. The following information was collected from patients who had a live-born baby: age at diagnosis of TAK, disease classification, age at delivery, treatments before and during pregnancy, complications during pregnancy, birth outcomes of the children, and changes in disease activity during pregnancy and after delivery.ResultsFifty-one cases and 69 pregnancies from 19 ethics committee-approved centers were enrolled during the study period 2019–2021. Of these, 49 cases and 66 pregnancies (95.7%) resulted in delivery and live-born babies. The Numano classification of the 49 cases was as follows: type I, 11; type IIa, 15; type IIb,12; type III, 1; type IV, 1; type V, 9; with type IIa being the most common. The age of diagnosis was 22 years (13–37 years, year of diagnosis 1965–2017), the median age of the delivery of 66 pregnancies was 31 years (year of delivery 1969-2021), and the median duration of illness at delivery was nine years. There were 34 planned pregnancies (51.5%, including four pregnancies by artificial insemination/ovulation induction). Preconception therapy included prednisolone (PSL) in 51 pregnancies (77.3%, median dose 7.5 mg (range 4–30 mg)/day), immunosuppressive drugs in 18 pregnancies (27.3%, azathioprine 8, tacrolimus 7, methotrexate 4, cyclosporin A 1, and colchicine 1), biologics in 12 pregnancies (18.1%, infliximab 6, tocilizumab 5, and adalimumab 1), antihypertensive drugs in 5 pregnancies (7.6%). Surgical treatment had been performed before pregnancy in 6 cases (aortic root replacement 2, subclavian artery dilatation 1, subclavian artery bypass 1, subclavian artery stenting 1, and ascending aorta semicircular artery replacement 1). Medications used during the course of pregnancy included PSL in 48 pregnancies (72.7%, median dose 8 mg (range 4–30 mg)/day, increased in 13 pregnancies, decreased in 1 pregnancy), immunosuppressants in 13 pregnancies (19.7%, azathioprine 6, tacrolimus 6, and cyclosporin A 1), biologics 9 pregnancies (13.6%, infliximab 4, tocilizumab 4, and adalimumab 1). Immunosuppressants and biologics were discontinued in five and four pregnancies after conception. Complications during pregnancy were observed in 20 pregnancies (30.3%), with hypertension being the most common. Complications related to TAK or its treatment were severe infections in two pregnancies and aneurysm enlargement due to increased circulating plasma volume in one pregnancy. Aortic arch replacement was performed after delivery for the latter case. Relapse of TAK was observed in 4 pregnancies (6.1%) during pregnancy and in 8 pregnancies (12.1%) after delivery. One pregnancy resulted in restenosis of subclavian artery for which dilatation procedure was performed prior to the pregnancy. There were 13/66 (19.7%) preterm infants and 17/59 (28.8%) low birth weight infants; all but one had a birth weight of more than 2,000 g and no had serious postnatal abnormalities. Forty-three (82.7%) of the 52 confirmed infants were breastfeed fully or mixed.ConclusionMost of the pregnancies in patients with TAK were successfully delivered while they had low disease activity at a dose of less than 10 mg/day of PSL. Relapse occurred during pregnancy and after delivery in some cases. The babies tended to have low birth weight, but 82.7% of them were breastfed without serious complications.Disclosure of InterestsTakako Miyamae: None declared, Yusuke Manabe: None declared, takahiko sugihara Speakers bureau: TS has received honoraria from Abbvie Japan Co., Ltd., AsahiKASEI Co., Ltd., Astellas Pharma Inc., Ayumi Pharmaceutical, Bristol Myers Squibb K.K., Chugai Pharmaceutical Co., Ltd., Eli Lilly Japan K.K., Mitsubishi-Tanabe Pharma Co., Ono Pharmaceutical, Pfizer Japan Inc., Takeda Pharmaceutical Co. Ltd., and UCB Japan Co., Grant/research support from: TS has received research grants from AsahiKASEI Co., Ltd., Daiichi Sankyo., Chugai Pharmaceutical Co., Ltd., and Ono Pharmaceutical., Natsuka Umezawa: None declared, Hajime Yoshifuji Speakers bureau: HY has received lecture fees from Janssen and Chugai., Naoto Tamura: None declared, Yoshiyuki Abe: None declared, Shunsuke Furuta Speakers bureau: Chugai Pharmaceutical Co.,Ltd.DaiichiSankyo Co.,Ltd.Asahi-Kasei Pharma Corporation, Manami Kato: None declared, Takashi Kumagai: None declared, Kaito Nakamura: None declared, Hiroko Nagafuchi: None declared, Jun Ishizaki: None declared, Naoko Nakano: None declared, Tatsuya Atsumi Speakers bureau: Mitsubishi Tanabe Pharma Co., Chugai Pharmaceutical Co., Ltd., Astellas Pharma Inc., Takeda Pharmaceutical Co., Ltd., Pfizer Inc., AbbVie Inc., Eisai Co. Ltd., Daiichi Sankyo Co., Ltd., Bristol-Myers Squibb Co., UCB Japan Co. Ltd., Eli Lilly Japan K.K., Novartis Pharma K.K., Eli Lilly Japan K.K., Kyowa Kirin Co., Ltd.,TAIHO PHARMACEUTICAL CO., LTD., Consultant of: AstraZeneca plc., MEDICAL & BIOLOGICAL LABORATORIES CO., LTD., Pfizer Inc., AbbVie Inc., ONO PHARMACEUTICAL CO. LTD.,Novartis Pharma K.K., Nippon Boehringer Ingelheim Co., Ltd., Grant/research support from: Astellas Pharma Inc., TAIHO PHARMACEUTICAL CO., LTD.AbbVie Inc., Nippon Boehringer Ingelheim Co., Ltd.,Takeda Pharmaceutical Co., Ltd., Mitsubishi Tanabe Pharma Co., Chugai Pharmaceutical Co., Ltd., Daiichi Sankyo Co. Ltd., Otsuka Pharmaceutical Co., Ltd. and Pfizer Inc. Alexion Inc., TEIJIN PHARMA LIMITED., Kohei Karino: None declared, Koichi Amano Speakers bureau: AbbVie GK, Asahi-Kasei Pharma, Astellas, Chugai Pharmaceutical Co.Ltd., Eisai, Eli Lilly, GlaxoSmithKlein, Janssen Pharma, Pfizer Japan, Grant/research support from: Asahi-Kasei Pharma,Chugai Pharmaceutical Co.Ltd., Takahiko Kurasawa: None declared, Shuichi Ito: None declared, Ryusuke Yoshimi: None declared, Noriyoshi Ogawa: None declared, Shogo Banno: None declared, Taio Naniwa Speakers bureau: Chugai, Tanabe, Abbbvie, Eisai, Grant/research support from: Chugai, Tanabe, Abbbvie, Eisai, Satoshi Ito Speakers bureau: SI has received speaker’s fees from pharmaceutical companies., Akinori Hara: None declared, Shinya Hirahara: None declared, Haruhito A. Uchida: None declared, Yasuhiro Onishi: None declared, Yohko Murakawa Speakers bureau: Astellas, UCB, Chugai, AbbVie, Grant/research support from: Chugai, AbbVie, Yoshinori Komagata: None declared, Yoshikazu Nakaoka: None declared, Masayoshi Harigai Speakers bureau: MH has received speaker’s fee from AbbVie Japan GK, Ayumi Pharmaceutical Co., Boehringer Ingelheim Japan, Inc., Chugai Pharmaceutical Co., Ltd., Eisai Co., Ltd., Janssen Pharmaceutical K.K., Kissei Pharmaceutical Co., Ltd., Novartis Japan, Pfizer Japan Inc., Mitsubishi Tanabe Pharma Co., Teijin Pharma Ltd and UCB Japan., Consultant of: MH is a consultant for AbbVie, Boehringer-Ingelheim, Kissei Pharmaceutical Co., Ltd., and Teijin Pharma.
Collapse
|
3
|
Can VH, Croydon DA, Kumagai T. Spectral dimension of simple random walk on a long-range percolation cluster. ELECTRON J PROBAB 2022. [DOI: 10.1214/22-ejp783] [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: 11/19/2022]
Affiliation(s)
- V. H. Can
- Institute of Mathematics, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - D. A. Croydon
- Research Institute for Mathematical Sciences, Kyoto University, Kyoto 606-8502, Japan
| | - T. Kumagai
- Department of Mathematics, Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| |
Collapse
|
4
|
Leighl N, Alexandru A, Ohe Y, Ruff P, Hida T, Nishio M, Rothenstein J, Tomiak A, Lowry P, Kumagai T, Gore I, Ntambwe I, Marimuthu S, Schenker M. FP04.01 Nivolumab 480 mg Every 4 Weeks as De Novo Second-line Treatment for Advanced Non-Small Cell Lung Cancer: CheckMate 907. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.215] [Citation(s) in RCA: 1] [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: 11/29/2022]
|
5
|
Yoshioka H, Mori M, Katakami N, Yokoyama T, Kaneda H, Hirano K, Kumagai T, Huang CL. 405P Promising efficacy as combination therapy of DFP-14323, protease inhibitor, with EGFR-TKI in patients with metastatic NSCLC harboring EGFR mutation. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.399] [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: 10/22/2022] Open
|
6
|
Oka T, Kamada R, Kunimasa K, Oboshi M, Nishikawa T, Yasui T, Shioyama W, Miyashita Y, Koyama T, Kumagai T, Fujita M. Pathological assessment of osimertinib-associated cardiotoxicity in EGFR-mutated non-small cell lung cancer patients. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0881] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Osimertinib, a third-generation epidermal growth factor receptor (EGFR)-tyrosine kinase inhibitor (TKI), inhibits both EGFR-TKI sensitizing mutations and resistant T790M mutations detected in non-small cell lung cancer (NSCLC) patients. Cardiac adverse events (AEs) induced by osimertinib are infrequent; however, cases of severe associated cardiac dysfunction have been reported and remain poorly understood.
Purpose
To assess pathogenesis of osimertinib-associated cardiac AEs, we analyzed myocardial specimens of three NSCLC cases with osimertinib-associated cardiac dysfunction.
Results
Analysis of LVEF prior to and after osimertinb administration in 36 NSCLC patients showed significant decrease of LVEF from 69% to 63%. Within this cohort, right ventricular (RV) biopsy was performed in 2 cases to further understand the pathophysiology of cardiac dysfunction. Case 1 was 78-year-old female with advanced NSCLC harboring an EGFR L858R mutation was treated with osimertinib as second line therapy. After 3 moths of osimetinib treatment, she presented with dyspnea, high NT-proBNP and troponin I, and significantly decreased left ventricular ejection fraction (LVEF) at 28%. RV biopsy showed moderate cardiomyocyte hypertrophy without inflammatory cell infiltration. Case 2 was 52-year-old female with advanced NSCLC harboring L858R mutation. She was treated with osimertinib as first line therapy. After 2 weeks of osimertinib, screening echocardiography revealed a reduction of LVEF from 63% to 41% without cardiac symptom. RV biopsy showed mild cardiomyocyte hypertrophy with infiltration of a few inflammatory cells in interstinum. We further analyzed death case of NSCLC. Case 3 was 63-year-old female with advanced NSCLC harboring EGFR ex. 19 del. and T790M mutations. After 6 months of osimertinib, she suffered from severe respiratory failure and severely reduced LVEF at 27%. She died on the 44th day after admission. Pathological autopsy revealed mild to moderate cardiomyocyte hypertrophy without inflammatory cell infiltration in both ventricles. These pathological findings may indicate neither myocyte injury nor myocarditis was induced by osimertinib in myocardium.
Conclusion
Although additional data collection of advanced NSCLC patients will be important in understanding the pathophysiology of cardiac AEs with osimertinib, osimertinib-associated cardiotoxicity may result from functional inhibition of myocyte contractility by osimertinib without induction of cell death or inflammation.
Funding Acknowledgement
Type of funding source: None
Collapse
Affiliation(s)
- T Oka
- Osaka International Cancer Institute, Department of Onco-Cardiology, Osaka, Japan
| | - R Kamada
- Osaka International Cancer Institute, Department of Onco-Cardiology, Osaka, Japan
| | - K Kunimasa
- Osaka International Cancer Institute, Department of Thoracic Oncology, Osaka, Japan
| | - M Oboshi
- Osaka International Cancer Institute, Department of Onco-Cardiology, Osaka, Japan
| | - T Nishikawa
- Osaka International Cancer Institute, Department of Onco-Cardiology, Osaka, Japan
| | - T Yasui
- Osaka International Cancer Institute, Department of Onco-Cardiology, Osaka, Japan
| | - W Shioyama
- Osaka International Cancer Institute, Department of Onco-Cardiology, Osaka, Japan
| | - Y Miyashita
- Yamanashi Prefectural Central Hospital, Department of Pneumology, Kofu, Japan
| | - T Koyama
- Yamanashi Prefectural Central Hospital, Department of Pathology, Kofu, Japan
| | - T Kumagai
- Osaka International Cancer Institute, Department of Thoracic Oncology, Osaka, Japan
| | - M Fujita
- Osaka International Cancer Institute, Department of Onco-Cardiology, Osaka, Japan
| |
Collapse
|
7
|
Imanishi A, Kawazoe T, Hamada Y, Kumagai T, Tsutsui K, Sakai N, Eto K, Noguchi A, Shimizu T, Takahashi T, Han G, Mishima K, Kanbayashi T, Kondo H. Early detection of Niemann-pick disease type C with cataplexy and orexin levels: continuous observation with and without Miglustat. Orphanet J Rare Dis 2020; 15:269. [PMID: 32993765 PMCID: PMC7523321 DOI: 10.1186/s13023-020-01531-4] [Citation(s) in RCA: 3] [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: 04/27/2020] [Accepted: 09/07/2020] [Indexed: 12/30/2022] Open
Abstract
Study objectives Niemann-Pick type C (NPC) is an autosomal recessive and congenital neurological disorder characterized by the accumulation of cholesterol and glycosphingolipids. Symptoms include hepatosplenomegaly, vertical supranuclear saccadic palsy, ataxia, dystonia, and dementia. Some cases frequently display narcolepsy-like symptoms, including cataplexy which was reported in 26% of all NPC patients and was more often recorded among late-infantile onset (50%) and juvenile onset (38%) patients. In this current study, we examined CSF orexin levels in the 10 patients of NPC with and without cataplexy, which supports previous findings. Methods Ten patients with NPC were included in the study (5 males and 5 females). NPC diagnosis was biochemically confirmed in all 10 patients, from which 8 patients with NPC1 gene were identified. We compared CSF orexin levels among NPC, narcoleptic and idiopathic hypersomnia patients. Results Six NPC patients with cataplexy had low or intermediate orexin levels. In 4 cases without cataplexy, their orexin levels were normal. In 5 cases with Miglustat treatment, their symptoms stabilized or improved. For cases without Miglustat treatment, their conditions worsened generally. The CSF orexin levels of NPC patients were significantly higher than those of patients with narcolepsy-cataplexy and lower than those of patients with idiopathic hypersomnia, which was considered as the control group with normal CSF orexin levels. Discussion Our study indicates that orexin level measurements can be an early alert of potential NPC. Low or intermediate orexin levels could further decrease due to reduction in the neuronal function in the orexin system, accelerating the patients’ NPC pathophysiology. However with Miglustat treatment, the orexin levels stabilized or improved, along with other general symptoms. Although the circuitry is unclear, this supports that orexin system is indeed involved in narcolepsy-cataplexy in NPC patients. Conclusion The NPC patients with cataplexy had low or intermediate orexin levels. In the cases without cataplexy, their orexin levels were normal. Our study suggests that orexin measurements can serve as an early alert for potential NPC; furthermore, they could be a marker of therapy monitoring during a treatment.
Collapse
Affiliation(s)
- A Imanishi
- Department of Psychiatry, Akita University Graduate School of Medicine, Akita, Japan
| | - T Kawazoe
- Department of Neurology, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Y Hamada
- Department of Pediatrics, Toyonaka Municipal Hospital, Toyonaka, Japan
| | - T Kumagai
- National Center for Child Health and Development, Tokyo, Japan
| | - K Tsutsui
- Department of Psychiatry, Akita University Graduate School of Medicine, Akita, Japan
| | - N Sakai
- Division of Health Sciences, Osaka University Graduate School of Medicine, Osaka, Japan
| | - K Eto
- Department of Pediatrics, Tokyo Women's Medical University, Tokyo, Japan
| | - A Noguchi
- Department of Pediatrics, Akita University Graduate School of Medicine, Akita, Japan
| | - T Shimizu
- Akita Mental Health and Welfare Center, Akita, Japan
| | - T Takahashi
- Department of Pediatrics, Akita University Graduate School of Medicine, Akita, Japan
| | - G Han
- International Institute for Integrative Sleep Medicine (IIIS), University of Tsukuba, Tsukuba, 305-8575, Japan
| | - K Mishima
- Department of Psychiatry, Akita University Graduate School of Medicine, Akita, Japan.,International Institute for Integrative Sleep Medicine (IIIS), University of Tsukuba, Tsukuba, 305-8575, Japan
| | - T Kanbayashi
- International Institute for Integrative Sleep Medicine (IIIS), University of Tsukuba, Tsukuba, 305-8575, Japan.
| | - H Kondo
- International Institute for Integrative Sleep Medicine (IIIS), University of Tsukuba, Tsukuba, 305-8575, Japan
| |
Collapse
|
8
|
Kunimasa K, Nakamura H, Sakai K, Kimura M, Inoue T, Tamiya M, Nishino K, Kumagai T, Nakatsuka S, Endo H, Inoue M, Nishio K, Imamura F. Heterogeneity of EGFR-mutant clones and PD-L1 highly expressing clones affects treatment efficacy of EGFR-TKI and PD-1 inhibitor. Ann Oncol 2019; 29:2145-2147. [PMID: 30099497 DOI: 10.1093/annonc/mdy312] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- K Kunimasa
- Department of Thoracic Oncology, Osaka International Cancer Institute, Osaka City, Japan.
| | - H Nakamura
- Department of Diagnostic Pathology and Cytology, Osaka International Cancer Institute, Osaka City, Japan
| | - K Sakai
- Department of Genome Biology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan
| | - M Kimura
- Department of Thoracic Oncology, Osaka International Cancer Institute, Osaka City, Japan
| | - T Inoue
- Department of Thoracic Oncology, Osaka International Cancer Institute, Osaka City, Japan
| | - M Tamiya
- Department of Thoracic Oncology, Osaka International Cancer Institute, Osaka City, Japan
| | - K Nishino
- Department of Thoracic Oncology, Osaka International Cancer Institute, Osaka City, Japan
| | - T Kumagai
- Department of Thoracic Oncology, Osaka International Cancer Institute, Osaka City, Japan
| | - S Nakatsuka
- Department of Diagnostic Pathology and Cytology, Osaka International Cancer Institute, Osaka City, Japan
| | - H Endo
- Department of Biochemistry, Osaka International Cancer Institute, Osaka City, Japan
| | - M Inoue
- Department of Biochemistry, Osaka International Cancer Institute, Osaka City, Japan; Department of Clinical Bio-resource Research and Development, Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - K Nishio
- Department of Genome Biology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan
| | - F Imamura
- Department of Thoracic Oncology, Osaka International Cancer Institute, Osaka City, Japan
| |
Collapse
|
9
|
Kawachi H, Tamiya M, Tamiya A, Ishii S, Hirano K, Matsumoto H, Yokoyama T, Ishida T, Ryota K, Fujimoto D, Hosoya K, Suzuki H, Hirashima T, Kanazu M, Sawa N, Uchida J, Morita M, Makio T, Hara S, Kumagai T. Prognostic impact of metastatic sites for pembrolizumab efficacy as first-line therapy in patients with PD-L1 tumour proportion score (TPS) ≥ 50% advanced non-small cell lung cancer: A retrospective multicenter study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz260.036] [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: 11/12/2022] Open
|
10
|
Tamiya M, Tamiya A, Go H, Inoue T, Kimura M, Kunimasa K, Nakahama K, Taniguchi Y, Shiroyama T, Isa S, Nishino K, Kumagai T, Suzuki H, Atagi S, Hirashima T, Shintani A, Imamura F. P1.04-62 Nomogram Based on Multivariable Regression Model Estimates the Overall Survival of Nivolumab for Previously Treated Advanced NSCLC. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.965] [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: 10/25/2022]
|
11
|
Nishino K, Kubota A, Kunimasa K, Kimura M, Inoue T, Tamiya M, Kuhara H, Kumagai T. P1.01-57 Association of Initial PD-L1 Expression with T790M-Acquired Resistance in Advanced EGFR-Mutant Lung Adenocarcinoma Patients. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.772] [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: 10/25/2022]
|
12
|
Akazawa Y, Nanjo S, Tamiya M, Hata A, Yamaguchi T, Kumagai T, Mori M, Katakami N. EP1.01-13 A Phase 2 Trial Assessing Osimertinib Activity Against Leptomeningeal Carcinomatosis in EGFR-Mutant Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1992] [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: 10/25/2022]
|
13
|
Tamiya M, Tamiya A, Hosoya K, Taniguchi Y, Yokoyama T, Fukuda Y, Hirano K, Matsumoto H, Kominami R, Suzuki H, Hirashima T, Uchida J, Morita M, Kanazu M, Sawa N, Hara S, Kinoshita Y, Kumagai T, Fujimoto D. The efficacy and safety of pembrolizumab as a first-line therapy in PD-L1 50% positive advanced NSCLC (HOPE-001). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz260.042] [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
|
14
|
Kunimasa K, Kimura M, Inoue T, Tamiya M, Nishino K, Imamura F, Kumagai T. EP1.14-08 Irreversible Severe Cardiotoxicities Except for QTc Interval Prolongation Associated with Osimertinib. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.2293] [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: 11/24/2022]
|
15
|
Hidaka T, Kakamu T, Endo S, Kasuga H, Masuishi Y, Kumagai T, Sato S, Sasaki T, Fukushima T. Factors associated with possession of accurate knowledge regarding occupational health management among operations leaders of radiation decontamination workers in Fukushima, Japan: a cross-sectional study. BMJ Open 2019; 9:e025729. [PMID: 31061030 PMCID: PMC6502049 DOI: 10.1136/bmjopen-2018-025729] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVES An operations leader (OL) takes an important role in occupational health management for radiation decontamination workers in Japan, and candidates for the position must participate in a training session to acquire the necessary knowledge as required by law. However, it has not been clarified whether the candidates for the OL position actually possess accurate knowledge regarding occupational health management for such work after the training session. We, therefore, aimed at examining the current occupational health management knowledge among the candidates and investigating factors related to the knowledge, with hypothesis that possession of accurate knowledge is associated with prior experience of having worked in radiation decontamination. DESIGN A cross-sectional study. SETTING The training sessions held by Fukushima Prefecture Labor Standard Associations in Fukushima, Japan, in 2017. PARTICIPANTS Eighty male candidates participated in the training sessions. OUTCOME The number/proportion of correct answers to the questions regarding occupational health management, such as those on working environment management, control of operations and health management. RESULTS The proportion of those who possessed accurate knowledge regarding working environment management, control of operations and health management was 68.8%, 55.0% and 51.2%, respectively. Experience of radiation decontamination work was associated with the possession of inaccurate knowledge regarding working environment management (OR 0.140 (95% CI 0.042 to 0.464)), and the uncertainty of future radiation decontamination work schedules in difficult-to-return zones was associated with the possession of accurate knowledge regarding health management (OR 4.344 (95% CI 1.509 to 12.50)). CONCLUSIONS Previous experience in radiation decontamination work may hinder the ability to acquire accurate information regarding working environment management among candidates for an OL position. To promote adequate occupational health management for radiation decontamination workers, it is required to establish an effective instructional method for the OL candidate training sessions with consideration of previous relevant experience.
Collapse
Affiliation(s)
- T Hidaka
- Department of Hygiene and Preventive Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - T Kakamu
- Department of Hygiene and Preventive Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - S Endo
- Department of Hygiene and Preventive Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - H Kasuga
- Department of Hygiene and Preventive Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Y Masuishi
- Department of Hygiene and Preventive Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - T Kumagai
- Department of Hygiene and Preventive Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - S Sato
- Department of Hygiene and Preventive Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - T Sasaki
- Department of Hygiene and Preventive Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - T Fukushima
- Department of Hygiene and Preventive Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| |
Collapse
|
16
|
Fujimori K, Arita A, Kumagai T. Effect of mechanical properties of adhesives on bond strength. Dent Mater 2019. [DOI: 10.1016/j.dental.2019.08.030] [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: 11/16/2022]
|
17
|
Miyake T, Kato K, Akiyama S, Azuma T, Yamamoto K, Kojima K, Nagaoka K, Shiraki K, Fujimoto A, Sato T, Kumagai T. Microstructure of new lithium-disilicate CAD/CAM block. Dent Mater 2019. [DOI: 10.1016/j.dental.2019.08.050] [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: 10/25/2022]
|
18
|
Nagano Y, Mori D, Kumagai T. Antimicrobial Effects of Zinc-Fluoride Releasable Glass-Ionomer Cement on Fusobacterium Nucleatum. Dent Mater 2019. [DOI: 10.1016/j.dental.2019.08.053] [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: 10/25/2022]
|
19
|
Tamiya M, Tamiya A, Suzuki H, Nakahama K, Taniguchi Y, Kunimasa K, Kimura M, Inoue T, Nishino K, Hirashima T, Atagi S, Imamura F, Kumagai T. Which of afatinib and gefitinib/erlotinib is the better EGFR-TKI to be followed by osimertinib? Ann Oncol 2018. [DOI: 10.1093/annonc/mdy292.081] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
20
|
Liu S, Baugh D, Motobayashi K, Zhao X, Levchenko SV, Gawinkowski S, Waluk J, Grill L, Persson M, Kumagai T. Anharmonicity in a double hydrogen transfer reaction studied in a single porphycene molecule on a Cu(110) surface. Phys Chem Chem Phys 2018; 20:12112-12119. [PMID: 29676424 DOI: 10.1039/c8cp00178b] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Anharmonicity plays a crucial role in hydrogen transfer reactions in hydrogen-bonding systems, which leads to a peculiar spectral line shape of the hydrogen stretching mode as well as highly complex intra/intermolecular vibrational energy relaxation. Single-molecule study with a well-defined model is necessary to elucidate a fundamental mechanism. Recent low-temperature scanning tunnelling microscopy (STM) experiments revealed that the cis↔cis tautomerization in a single porphycene molecule on Cu(110) at 5 K can be induced by vibrational excitation via an inelastic electron tunnelling process and the N-H(D) stretching mode couples with the tautomerization coordinate [Kumagai et al. Phys. Rev. Lett. 2013, 111, 246101]. Here we discuss a pronounced anharmonicity of the N-H stretching mode observed in the STM action spectra and the conductance spectra. Density functional theory calculations find a strong intermode coupling of the N-H stretching with an in-plane bending mode within porphycene on Cu(110).
Collapse
Affiliation(s)
- S Liu
- Department of Physical Chemistry, Fritz-Haber Institute of the Max-Planck Society, Faradayweg 4-6, 14195 Berlin, Germany.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Nakashima Y, Niizeki N, Usuki D, Ueno T, Kumagai T. Evaluation of surface roughness of alginate impression materials. Dent Mater 2018. [DOI: 10.1016/j.dental.2018.08.176] [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: 11/28/2022]
|
22
|
Nagano Y, Mori D, Kumagai T. Zn2+ containing glass ionomer cement inhibits root dentin demineralization. Dent Mater 2018. [DOI: 10.1016/j.dental.2018.08.175] [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]
|
23
|
|
24
|
Horikoshi M, Kumagai T, Takagi K. Magnetic resonance imaging-detected digital artery stenosis associated with Raynaud’s phenomenon in a patient with anti-signal recognition particle antibody-associated myopathy: a rare complication. Scand J Rheumatol Suppl 2017; 46:503-504. [DOI: 10.1080/03009742.2017.1284261] [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: 11/01/2022]
Affiliation(s)
- M Horikoshi
- Department of Rheumatology, Saitama Red Cross Hospital, Saitama, Japan
- Department of Rheumatology, Sainokuni Higashiomiya Medical Center, Saitama, Japan
| | - T Kumagai
- Department of Rheumatology, Sainokuni Higashiomiya Medical Center, Saitama, Japan
- Department of Ophthalmology, Saitama Medical University Hospital, Saitama, Japan
| | - K Takagi
- Department of Rheumatology, Sainokuni Higashiomiya Medical Center, Saitama, Japan
| |
Collapse
|
25
|
Tamiya A, Tamiya M, Nakahama K, Taniguchi Y, Shiroyama T, Isa SI, Inoue T, Okishio K, Nishino K, Kumagai T, Suzuki H, Hirashima T, Imamura F, Atagi S. The efficacy and onset risk of interstitial lung disease of nivolumab in elderly (75 years old or older) patients with non-small cell lung cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx671.026] [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
|
26
|
Taniguchi Y, Tamiya A, Isa SI, Nakahama K, Okishio K, Shiroyama T, Suzuki H, Inoue T, Tamiya M, Nishino K, Kumagai T, Hirashima T, Imamura F, Atagi S. Predictive factors for poor progression-free survival in patients with non-small-cell lung cancer treated with nivolumab. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx376.027] [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: 11/15/2022] Open
|
27
|
Tamiya A, Tamiya M, Nakahama K, Taniguchi Y, Shiroyama T, Isa SI, Inoue T, Nishino K, Kumagai T, Suzuki H, Hirashima T, Imamura F, Atagi S. Correlation of radiation pneumonitis history before nivolumab and onset risk of interstitial lung disease or progression free survival of nivolumab in patients with non-small cell lung cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx380.007] [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
|
28
|
Takahashi H, Okamoto A, Kawamura Y, Kumagai T, Daibo A, Kitajima S. Line Spectra Observation of the Rydberg Helium Atoms due to Volumetric Recombination in the RF Plasma Source DT-ALPHA. Fusion Science and Technology 2017. [DOI: 10.13182/fst13-a16969] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- H. Takahashi
- Department of Quantum Science and Energy Engineering, Tohoku University: 6-6-01-2 Aobayama, Sendai 980-8579, Japan
| | - A. Okamoto
- Department of Quantum Science and Energy Engineering, Tohoku University: 6-6-01-2 Aobayama, Sendai 980-8579, Japan
| | - Y. Kawamura
- Department of Quantum Science and Energy Engineering, Tohoku University: 6-6-01-2 Aobayama, Sendai 980-8579, Japan
| | - T. Kumagai
- Department of Quantum Science and Energy Engineering, Tohoku University: 6-6-01-2 Aobayama, Sendai 980-8579, Japan
| | - A. Daibo
- Department of Quantum Science and Energy Engineering, Tohoku University: 6-6-01-2 Aobayama, Sendai 980-8579, Japan
| | - S. Kitajima
- Department of Quantum Science and Energy Engineering, Tohoku University: 6-6-01-2 Aobayama, Sendai 980-8579, Japan
| |
Collapse
|
29
|
Barlow MT, Croydon DA, Kumagai T. Subsequential scaling limits of simple random walk on the two-dimensional uniform spanning tree. ANN PROBAB 2017. [DOI: 10.1214/15-aop1030] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
30
|
Takayama K, Sasabe N, Hotta S, Yokonuma K, Funabashi H, Kumagai T. Detection of oral bacterial flora using DNA array. Dent Mater 2017. [DOI: 10.1016/j.dental.2017.08.156] [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: 10/18/2022]
|
31
|
Kato H, Ueno T, Kumagai T. Evaluation of gloss retention of indirect composite after toothbrush abrasion. Dent Mater 2017. [DOI: 10.1016/j.dental.2017.08.079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
32
|
Fita P, Grill L, Listkowski A, Piwoński H, Gawinkowski S, Pszona M, Sepioł J, Mengesha E, Kumagai T, Waluk J. Spectroscopic and microscopic investigations of tautomerization in porphycenes: condensed phases, supersonic jets, and single molecule studies. Phys Chem Chem Phys 2017; 19:4921-4937. [DOI: 10.1039/c6cp07955e] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Tautomerization of porphycene, coherent in supersonic jets and a rate process in solutions, can be controlled for single molecules on surfaces.
Collapse
Affiliation(s)
- P. Fita
- Institute of Experimental Physics
- Faculty of Physics
- University of Warsaw
- 02-093 Warsaw
- Poland
| | - L. Grill
- Department of Physical Chemistry
- University of Graz
- 8010 Graz
- Austria
| | - A. Listkowski
- Faculty of Mathematics and Natural Sciences
- College of Science
- Cardinal Stefan Wyszyński University
- 01-815 Warsaw
- Poland
| | - H. Piwoński
- Institute of Physical Chemistry
- Polish Academy of Sciences
- Warsaw
- Poland
| | - S. Gawinkowski
- Institute of Physical Chemistry
- Polish Academy of Sciences
- Warsaw
- Poland
| | - M. Pszona
- Institute of Physical Chemistry
- Polish Academy of Sciences
- Warsaw
- Poland
| | - J. Sepioł
- Institute of Physical Chemistry
- Polish Academy of Sciences
- Warsaw
- Poland
| | - E. Mengesha
- Institute of Physical Chemistry
- Polish Academy of Sciences
- Warsaw
- Poland
| | - T. Kumagai
- Department of Physical Chemistry
- Fritz-Haber Institute of the Max-Planck Society
- 14195 Berlin
- Germany
| | - J. Waluk
- Faculty of Mathematics and Natural Sciences
- College of Science
- Cardinal Stefan Wyszyński University
- 01-815 Warsaw
- Poland
| |
Collapse
|
33
|
Azuma T, Kumagai T, Sato T, Mashio G, Fujimoto T, Akiyama S, Yokohara H, Hoshino T, Miyake T. Evaluation of machinable lithium disilicate glass ceramic block for CAD/CAM. Dent Mater 2017. [DOI: 10.1016/j.dental.2017.08.012] [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: 10/18/2022]
|
34
|
Kumagai T, Liu S, Shiotari A, Baugh D, Shaikhutdinov S, Wolf M. Local electronic structure, work function, and line defect dynamics of ultrathin epitaxial ZnO layers on a Ag(1 1 1) surface. J Phys Condens Matter 2016; 28:494003. [PMID: 27731306 DOI: 10.1088/0953-8984/28/49/494003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Using combined low-temperature scanning tunneling microscopy and Kelvin probe force microscopy we studied the local electronic structure and work function change of the (0 0 0 1)-oriented epitaxial ZnO layers on a Ag(1 1 1) substrate. Scanning tunneling spectroscopy (STS) revealed that the conduction band minimum monotonically downshifts as the number of the ZnO layers increases up to 4 monolayers (ML). However, it was found by field emission resonance (FER) spectroscopy that the local work function of Ag(1 1 1) slightly decreases for 2 ML thick ZnO but it dramatically changes and drops by about 1.2 eV between 2 and 3 ML, suggesting a structural transformation of the ZnO layer. The spatial variation of the conduction band minimum and the local work function change were visualized at the nanometer scale by mapping the STS and FER intensities. Furthermore, we found that the ZnO layers contained line defects with a few tens of nm long, which can be removed by the injection of a tunneling electron into the conduction band.
Collapse
|
35
|
Palma G, Falconi MC, Starecki F, Nazabal V, Yano T, Kishi T, Kumagai T, Prudenzano F. Novel double step approach for optical sensing via microsphere WGM resonance. Opt Express 2016; 24:26956-26971. [PMID: 27857423 DOI: 10.1364/oe.24.026956] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The use of resonant whispering gallery modes (WGMs) for sensing exhibits various drawbacks and critical points related to the microsphere and tapered optical fiber fabrication tolerance. The uncertainty on the fiber taper and microsphere geometry or the gap between the microsphere and the fiber taper can complicate or limit the actual use of these devices for sensing, requiring peculiar calibration of the WGM based sensing set-up. An alternative double-step approach is proposed in this paper. In particular, the geometrical parameters of the set-up are recovered preliminarily and then the rare earth parameters are recovered via simple transmittance/gain measurements. The method is based on a refined electromagnetic model of the device suitably integrated with a particle swarm optimization (PSO) approach. The percent errors made on the up-conversion coefficients Cup and C3 are extremely low, being 0.75%, 0.05%, respectively. The procedure is very robust. It can be applied more in general, allowing the sensing of other physical parameters via simple transmittance measurements instead of wavelength shift ones, in both microsphere and microbubble based set-up.
Collapse
|
36
|
Saitoh M, Kobayashi K, Ohmori I, Tanaka Y, Tanaka K, Inoue T, Horino A, Ohmura K, Kumakura A, Takei Y, Hirabayashi S, Kajimoto M, Uchida T, Yamazaki S, Shiihara T, Kumagai T, Kasai M, Terashima H, Kubota M, Mizuguchi M. Cytokine-related and sodium channel polymorphism as candidate predisposing factors for childhood encephalopathy FIRES/AERRPS. J Neurol Sci 2016; 368:272-6. [PMID: 27538648 DOI: 10.1016/j.jns.2016.07.040] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [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: 05/16/2016] [Revised: 07/13/2016] [Accepted: 07/14/2016] [Indexed: 11/15/2022]
Abstract
Febrile infection-related epilepsy syndrome (FIRES), or acute encephalitis with refractory, repetitive partial seizures (AERRPS), is an epileptic encephalopathy beginning with fever-mediated seizures. The etiology remains unclear. To elucidate the genetic background of FIRES/AERRPS (hereafter FIRES), we recruited 19 Japanese patients, genotyped polymorphisms of the IL1B, IL6, IL10, TNFA, IL1RN, SCN1A and SCN2A genes, and compared their frequency between the patients and controls. For IL1RN, the frequency of a variable number of tandem repeat (VNTR) allele, RN2, was significantly higher in the patients than in controls (p=0.0067), and A allele at rs4251981 in 5' upstream of IL1RN with borderline significance (p=0.015). Haplotype containing RN2 was associated with an increased risk of FIRES (OR 3.88, 95%CI 1.40-10.8, p=0.0057). For SCN1A, no polymorphisms showed a significant association, whereas a missense mutation, R1575C, was found in two patients. For SCN2A, the minor allele frequency of G allele at rs1864885 was higher in patients with borderline significance (p=0.011). We demonstrated the association of IL1RN haplotype containing RN2 with FIRES, and showed a possible association of IL1RN rs4251981 G>A and SCN2A rs1864885 A>G, in Japanese patients. These preliminary findings suggest the involvement of multiple genetic factors in FIRES, which needs to be confirmed by future studies in a larger number of FIRES cases.
Collapse
Affiliation(s)
- M Saitoh
- Department of Developmental Medical Sciences, Graduate School of Medicine, The University of Tokyo, Japan.
| | - K Kobayashi
- Department of Child Neurology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
| | - I Ohmori
- Department of Special Needs Education, Graduate School of Education, Okayama University, Japan
| | - Y Tanaka
- Department of Pediatrics, Ohta Nishinouchi General Hospital, Japan
| | - K Tanaka
- Department of Pediatrics, Ohta Nishinouchi General Hospital, Japan
| | - T Inoue
- Department of Pediatrics, Child Medical Center, Osaka City General Hospital, Japan
| | - A Horino
- Department of Pediatrics, Child Medical Center, Osaka City General Hospital, Japan
| | - K Ohmura
- Department of Pediatrics, Kishiwada City Hospital, Japan
| | - A Kumakura
- Department of Pediatrics, Kitano Hospital, Japan
| | - Y Takei
- Division of Neurology, Nagano Childrens' Hospital, Japan
| | - S Hirabayashi
- Division of Neurology, Nagano Childrens' Hospital, Japan
| | - M Kajimoto
- Department of Pediatrics, Yamaguchi University, Japan
| | - T Uchida
- Department of Pediatrics, Sendai City, Hospital, Japan
| | - S Yamazaki
- Department of Pediatrics, Niigata City Hospital, Japan
| | - T Shiihara
- Department of Neurology, Gunma Children's Medical Center, Japan
| | - T Kumagai
- Division of Neurology, National Center for Child Health and Development, Japan
| | - M Kasai
- Division of Neurology, National Center for Child Health and Development, Japan
| | - H Terashima
- Division of Neurology, National Center for Child Health and Development, Japan
| | - M Kubota
- Division of Neurology, National Center for Child Health and Development, Japan
| | - M Mizuguchi
- Department of Developmental Medical Sciences, Graduate School of Medicine, The University of Tokyo, Japan
| |
Collapse
|
37
|
Tamatani S, Ito Y, Koike T, Abe H, Kumagai T, Kurashima A, Koizumi T, Takeuchi S, Tanaka R. Efficacy of Diluted NBCA Mixture for Embolization of Arteriovenous Malformations. Interv Neuroradiol 2016; 5 Suppl 1:161-5. [DOI: 10.1177/15910199990050s129] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/1999] [Accepted: 09/30/1999] [Indexed: 11/17/2022] Open
Abstract
The purpose of this study is to evaluate the efficacy and problems of the embolization for cerebral arteriovenous malformations (AVMs) with diluted cyanoacrylate adhesives. Twelve consecutive AVM cases were treated with N-butyl-2-cyanoacrylate (NBCA) glues between January 1997 and July 1998. The mean age of the patients was 37 years old. Intracerebral hemorrhage was the presenting symptom in seven cases, seizure in three, headache in one and mental deterioration in one. According to the classification of Spetzler and Martin, seven were Grade 11, five were Grade III. We used a mixture of NBCA (normally 25% Histoacryl, 75% Ethidol) for embolization. Microcatheter was navigated into the nidus and the tip of the catheter was set in a wedged position. Then the glue was injected using complete column technique. Nineteen sessions of embolization were performed in 12 patients. The mean volume of each nidus was reduced from 22.5 ml to 3.4 ml (85%) after embolization. Four cases were cured by embolization alone. Surgical resection was performed after embolization without any residual nidus in three cases. Five were treated with stereotactic radiosurgery following embolization. One was completely cured in 18 months after and the other four have been decreasing their sizes of nidus. One case was suffered from delayed intracerebral hemorrhage three days after embolization, and resulted in mild hemiparesis and memory disturbance. The others had no complications and were clinically improved or unchanged after embolization. It is possible to embolize the nidus of AVMs more accurately and safely with diluted mixture of NBCA, compared with the method using relatively higher concentration of NBCA glues. This technique is useful and effective method for the treatment of AVMs.
Collapse
Affiliation(s)
| | | | - T. Koike
- Department of Neurosurgery, Niigata City General Hospital; Niigata
| | | | | | | | | | | | | |
Collapse
|
38
|
Böckmann H, Liu S, Mielke J, Gawinkowski S, Waluk J, Grill L, Wolf M, Kumagai T. Direct Observation of Photoinduced Tautomerization in Single Molecules at a Metal Surface. Nano Lett 2016; 16:1034-41. [PMID: 26796945 DOI: 10.1021/acs.nanolett.5b04092] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Molecular switches are of fundamental importance in nature, and light is an important stimulus to selectively drive the switching process. However, the local dynamics of a conformational change in these molecules remain far from being completely understood at the single-molecule level. Here, we report the direct observation of photoinduced tautomerization in single porphycene molecules on a Cu(111) surface by using a combination of low-temperature scanning tunneling microscopy and laser excitation in the near-infrared to ultraviolet regime. It is found that the thermodynamically stable trans configuration of porphycene can be converted to the metastable cis configuration in a unidirectional fashion by photoirradiation. The wavelength dependence of the tautomerization cross section exhibits a steep increase around 2 eV and demonstrates that excitation of the Cu d-band electrons and the resulting hot carriers play a dominant role in the photochemical process. Additionally, a pronounced isotope effect in the cross section (∼100) is observed when the transferred hydrogen atoms are substituted with deuterium, indicating a significant contribution of zero-point energy in the reaction. Combined with the study of inelastic tunneling electron-induced tautomerization with the STM, we propose that tautomerization occurs via excitation of molecular vibrations after photoexcitation. Interestingly, the observed cross section of ∼10(-19) cm(2) in the visible-ultraviolet region is much higher than that of previously studied molecular switches on a metal surface, for example, azobenzene derivatives (10(-23)-10(-22) cm(2)). Furthermore, we examined a local environmental impact on the photoinduced tautomerization by varying molecular density on the surface and find substantial changes in the cross section and quenching of the process due to the intermolecular interaction at high density.
Collapse
Affiliation(s)
- H Böckmann
- Department of Physical Chemistry, Fritz-Haber Institute of the Max-Planck Society , Faradayweg 4-6, 14195 Berlin, Germany
| | - S Liu
- Department of Physical Chemistry, Fritz-Haber Institute of the Max-Planck Society , Faradayweg 4-6, 14195 Berlin, Germany
| | - J Mielke
- Department of Physical Chemistry, Fritz-Haber Institute of the Max-Planck Society , Faradayweg 4-6, 14195 Berlin, Germany
| | - S Gawinkowski
- Institute of Physical Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, Warsaw 01-224, Poland
| | - J Waluk
- Institute of Physical Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, Warsaw 01-224, Poland
- Faculty of Mathematics and Natural Sciences, College of Science, Cardinal Stefan Wyszyński University , Dewajtis 5, 01-815 Warsaw, Poland
| | - L Grill
- Department of Physical Chemistry, Fritz-Haber Institute of the Max-Planck Society , Faradayweg 4-6, 14195 Berlin, Germany
- Department of Physical Chemistry, University of Graz , Heinrichstrasse 28, 8010 Graz, Austria
| | - M Wolf
- Department of Physical Chemistry, Fritz-Haber Institute of the Max-Planck Society , Faradayweg 4-6, 14195 Berlin, Germany
| | - T Kumagai
- Department of Physical Chemistry, Fritz-Haber Institute of the Max-Planck Society , Faradayweg 4-6, 14195 Berlin, Germany
| |
Collapse
|
39
|
Fujimori K, Matsumoto N, Arita A, Kumagai T. Evaluation of bonding properties of G-Cem linkforce to ceramic restorations. Dent Mater 2016. [DOI: 10.1016/j.dental.2016.08.057] [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: 10/20/2022]
|
40
|
Kato H, Machida D, Ueno T, Kumagai T. Notchless trianguler prism fracture toughness of new indirect composite. Dent Mater 2016. [DOI: 10.1016/j.dental.2016.08.069] [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: 10/20/2022]
|
41
|
Miyake T, Mashio G, Mori D, Fujimoto T, Yoshinaga M, Yokohara H, Hoshino T, Miyake T, Sato T, Kumagai T. Evaluation of optical and physical properties for initial LiSi press. Dent Mater 2016. [DOI: 10.1016/j.dental.2016.08.041] [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: 11/28/2022]
|
42
|
Kato H, Arita A, Kumagai T. Evaluation of bonding performance using new adhesive and composite resin. Dent Mater 2015. [DOI: 10.1016/j.dental.2015.08.089] [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: 11/17/2022]
|
43
|
Shimada Y, Yamamoto K, Fukushima S, Kumagai T. Evaluation of wear resistance of coating materials on GI restorative. Dent Mater 2015. [DOI: 10.1016/j.dental.2015.08.056] [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: 10/23/2022]
|
44
|
Mori K, Chiba Y, Toyota S, Kumagai T, Yamamoto S, Sugano H, Taki T. RT-23 * THE ROLE OF GAMMA KNIFE RADIOSURGERY IN THE TREATMENT FOR PRIMARY CENTRAL NERVOUS SYSTEM LYMPHOMAS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou270.20] [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
|
45
|
Chiba Y, Mori K, Toyota S, Kumagai T, Yamamoto S, Sugano H, Taki T. RT-06 * GAMMA KNIFE SURGERY AFTER NAVIGATION-GUIDED ASPIRATION FOR CYSTIC METASTATIC BRAIN TUMORS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou270.4] [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] Open
|
46
|
Isobe M, Ogawa K, Miyake H, Hayashi H, Kobuchi T, Nakano Y, Watanabe K, Uritani A, Misawa T, Nishitani T, Tomitaka M, Kumagai T, Mashiyama Y, Ito D, Kono S, Yamauchi M, Takeiri Y. Wide dynamic range neutron flux monitor having fast time response for the Large Helical Device. Rev Sci Instrum 2014; 85:11E114. [PMID: 25430293 DOI: 10.1063/1.4891049] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A fast time response, wide dynamic range neutron flux monitor has been developed toward the LHD deuterium operation by using leading-edge signal processing technologies providing maximum counting rate up to ∼5 × 10(9) counts/s. Because a maximum total neutron emission rate over 1 × 10(16) n/s is predicted in neutral beam-heated LHD plasmas, fast response and wide dynamic range capabilities of the system are essential. Preliminary tests have demonstrated successful performance as a wide dynamic range monitor along the design.
Collapse
Affiliation(s)
- M Isobe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H Miyake
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H Hayashi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T Kobuchi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y Nakano
- Department of Materials, Physics and Energy Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - K Watanabe
- Department of Materials, Physics and Energy Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - A Uritani
- Department of Materials, Physics and Energy Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - T Misawa
- Kyoto University Research Reactor Institute, Kumatori 590-0494, Japan
| | - T Nishitani
- Japan Atomic Energy Agency, Rokkasho 039-3212, Japan
| | - M Tomitaka
- Toshiba Corporation, Fuchu 183-8511, Japan
| | - T Kumagai
- Toshiba Corporation, Fuchu 183-8511, Japan
| | | | - D Ito
- Toshiba Corporation, Fuchu 183-8511, Japan
| | - S Kono
- Toshiba Corporation, Fuchu 183-8511, Japan
| | - M Yamauchi
- Toshiba Nuclear Engineering Services Corporation, Yokohama 235-8523, Japan
| | - Y Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
| |
Collapse
|
47
|
Tsuji M, Mori Y, Kanda H, Ito T, Hidaka T, Kakamu T, Kumagai T, Hayakawa T, Osaki Y, Fukushima T. Determine whether nicotine metabolism can be a key to quitting smoking. Eur J Public Health 2014. [DOI: 10.1093/eurpub/cku164.098] [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: 11/13/2022] Open
|
48
|
Gramer M, Feuerstein D, Steimers A, Takagaki M, Kumagai T, Sué M, Vollmar S, Kohl-Bareis M, Backes H, Graf R. Device for simultaneous positron emission tomography, laser speckle imaging and RGB reflectometry: validation and application to cortical spreading depression and brain ischemia in rats. Neuroimage 2014; 94:250-262. [PMID: 24657778 DOI: 10.1016/j.neuroimage.2014.03.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 10/08/2013] [Revised: 02/06/2014] [Accepted: 03/10/2014] [Indexed: 11/16/2022] Open
Abstract
Brain function critically relies on the supply with energy substrates (oxygen and glucose) via blood flow. Alterations in energy demand as during neuronal activation induce dynamic changes in substrate fluxes and blood flow. To study the complex system that regulates cerebral metabolism requires the combination of methods for the simultaneous assessment of multiple parameters. We developed a multimodal imaging device to combine positron emission tomography (PET) with laser speckle imaging (LSI) and RGB reflectometry (RGBR). Depending on the radiotracer, PET provides 3-dimensional quantitative information of specific molecular processes, while LSI and RGBR measure cerebral blood flow (CBF) and hemoglobin oxygenation at high temporal and spatial resolution. We first tested the functional capability of each modality within our system and showed that interference between the modalities is negligible. We then cross-calibrated the system by simultaneously measuring absolute CBF using (15)O-H2O PET (CBF(PET)) and the inverse correlation time (ICT), the LSI surrogate for CBF. ICT and CBF(PET) correlated in multiple measurements in individuals as well as across different animals (R(2)=0.87, n=44 measurements) indicating that ICT can be used for absolute quantitative assessment of CBF. To demonstrate the potential of the combined system, we applied it to cortical spreading depression (CSD), a wave of transient cellular depolarization that served here as a model system for neurovascular and neurometabolic coupling. We analyzed time courses of hemoglobin oxygenation and CBF alterations coupled to CSD, and simultaneously measured regional uptake of (18)F-2-fluoro-2-deoxy-D-glucose ((18)F-FDG) used as a radiotracer for regional glucose metabolism, in response to a single CSD and to a cluster of CSD waves. With this unique combination, we characterized the changes in cerebral metabolic rate of oxygen (CMRO2) in real-time and showed a correlation between (18)F-FDG uptake and the number of CSD waves that passed the local tissue. Finally, we examined CSD spontaneously occurring during focal ischemia also referred to as peri-infarct depolarization (PID). In the vicinity of the ischemic territory, we observed PIDs that were characterized by reduced CMRO2 and increased oxygen extraction fraction (OEF), indicating a limitation of oxygen supply. Simultaneously measured PET showed an increased (18)F-FDG uptake in these regions. Our combined system proved to be a novel tool for the simultaneous study of dynamic spatiotemporal alterations of cortical blood flow, oxygen metabolism and glucose consumption under normal and pathologic conditions.
Collapse
Affiliation(s)
- M Gramer
- Max-Planck-Institute of Neurological Research, Gleueler Str. 50, 50825 Cologne, Germany.
| | - D Feuerstein
- Max-Planck-Institute of Neurological Research, Gleueler Str. 50, 50825 Cologne, Germany
| | - A Steimers
- RheinAhrCampus Remagen, University of Applied Sciences Koblenz, Joseph-Rovan Allee 2, 53424 Remagen, Germany
| | - M Takagaki
- Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - T Kumagai
- Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - M Sué
- Max-Planck-Institute of Neurological Research, Gleueler Str. 50, 50825 Cologne, Germany
| | - S Vollmar
- Max-Planck-Institute of Neurological Research, Gleueler Str. 50, 50825 Cologne, Germany
| | - M Kohl-Bareis
- RheinAhrCampus Remagen, University of Applied Sciences Koblenz, Joseph-Rovan Allee 2, 53424 Remagen, Germany
| | - H Backes
- Max-Planck-Institute of Neurological Research, Gleueler Str. 50, 50825 Cologne, Germany
| | - R Graf
- Max-Planck-Institute of Neurological Research, Gleueler Str. 50, 50825 Cologne, Germany
| |
Collapse
|
49
|
Daibo A, Okamoto A, Takahashi H, Kumagai T, Takahashi T, Tsubota S, Kitajima S. Development of ion source for simulation of edge localized mode in divertor plasma. Rev Sci Instrum 2014; 85:02B307. [PMID: 24593584 DOI: 10.1063/1.4826099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A helium ion beam is injected into a linear plasma device for the development of an ion beam source simulating high energy particle flux in divertor plasma. Beam current density more than 10 mA/cm(2) is extracted. Measurement of beam currents indicates that the beam is transported along the linear device and reaches to the downstream end plate.
Collapse
Affiliation(s)
- A Daibo
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Japan
| | - A Okamoto
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Japan
| | - H Takahashi
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Japan
| | - T Kumagai
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Japan
| | - T Takahashi
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Japan
| | - S Tsubota
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Japan
| | - S Kitajima
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Japan
| |
Collapse
|
50
|
Hokii Y, Yoshimitsu R, Yamamoto K, Fukushima S, Fusejima F, Kumagai T. Protection of enamel-glass ionomer restorative margins by resin-coatings. Dent Mater 2014. [DOI: 10.1016/j.dental.2014.08.220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|