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Kabuki S, Sonoda S, Hatsukawa Y, Kimura H, Asai M, Hashimoto K, Komura S, Kubo H, Matsuoka Y, Mizumoto T, Nagai Y, Nakamura S, Sato T, Sawano T, Takada A, Toyoshima A, Tsukada K, Kunieda E, Tanimori T. SU-C-144-01: Imaging Study of An Electron-Tracking Compton Camera for Nuclear Medicine. Med Phys 2013. [DOI: 10.1118/1.4813990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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52
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Sato TK, Sato N, Asai M, Tsukada K, Toyoshima A, Ooe K, Miyashita S, Schädel M, Kaneya Y, Nagame Y, Osa A, Ichikawa SI, Stora T, Kratz JV. First successful ionization of Lr (Z = 103) by a surface-ionization technique. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:023304. [PMID: 23464201 DOI: 10.1063/1.4789772] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We have developed a surface ionization ion-source as part of the JAEA-ISOL (Isotope Separator On-Line) setup, which is coupled to a He/CdI2 gas-jet transport system to determine the first ionization potential of the heaviest actinide lawrencium (Lr, Z = 103). The new ion-source is an improved version of the previous source that provided good ionization efficiencies for lanthanides. An additional filament was newly installed to give better control over its operation. We report, here, on the development of the new gas-jet coupled surface ion-source and on the first successful ionization and mass separation of 27-s (256)Lr produced in the (249)Cf + (11)B reaction.
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Hata K, Shinozaki M, Toyoshima O, Toyoshima A, Matsumoto S, Saisho T, Tsurita G. Impact of family history of gastric cancer on colorectal neoplasias in young Japanese. Colorectal Dis 2013; 15:42-6. [PMID: 22642814 DOI: 10.1111/j.1463-1318.2012.03108.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
AIM The aim of this study was to elucidate risk factors for the development of colorectal neoplasia in the young population. In particular, we focused on the family history of gastric cancer. METHOD Young Japanese subjects aged 30-49 years old who underwent colonoscopy for the first time from August 2007 to August 2008 were included in this study. A total of 300 unselected consecutive patients (mean age 40.5 years) were eligible for analysis, and family history of colorectal cancer and gastric cancer, sex, age, body mass index, positivity of faecal occult blood test and the presence of symptoms were evaluated. Risk factors for developing colorectal adenoma and/or carcinoma were assessed. RESULTS Colorectal neoplasias were detected in 83 (27.7%) cases. Two were found to have invasive carcinoma. Univariate and multivariate analyses revealed that family history of gastric cancer (OR 2.09, 95% CI 1.12-3.92, P = 0.02) was an independent risk factor for the development of colorectal neoplasia, as well as male sex (OR 1.89, 95% CI 1.10-3.27, P = 0.02), older age (OR 2.05, 95% CI 1.18-3.55, P = 0.01) and positive faecal occult blood test (OR 1.99, 95% CI 1.14-3.48, P = 0.02). CONCLUSION In the young population under 50 years of age, a family history of gastric cancer is an independent risk factor for the development of colorectal neoplasia.
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Miyamoto S, Igeta Y, Toyoshima A. A Cese of Colorectal Cancer which was Safely Treated with Folfiri, Although Complicated by Reversible Posterior Leukoencephalopathy Syndrome after Bevacizumab + FOLFOX. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32453-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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55
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Ishii Y, Toyoshima A, Tsukada K, Asai M, Li Z, Nagame Y, Miyashita S, Mori T, Suganuma H, Haba H, Goto SI, Kudo H, Akiyama K, Oura Y, Shinohara A, Schädel M, Pershina V, Kratz JV. Fluorido Complex Formation of Element 104, Rutherfordium (Rf). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2011. [DOI: 10.1246/bcsj.20110126] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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56
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Li ZJ, Toyoshima A, Asai M, Tsukada K, Sato TK, Sato N, Kikuchi T, Nagame Y, Schädel M, Pershina V, Liang XH, et al.. Sulfate complexation of element 104, Rf, in H2SO4/HNO3 mixed solution. RADIOCHIM ACTA 2011. [DOI: 10.1524/ract.2012.1898] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The cation-exchange behavior of 261Rf (T
1/2= 78 s) produced in the 248Cm(18O, 5n) reaction was studied on a “one-atom-at-a-time” scale in 0.15–0.69 M H2SO4/HNO3 mixed solutions ([H+]=1.0 M) using an automated ion-exchange separation apparatus coupled with the detection system for alpha-spectroscopy (AIDA). It was found that adsorption probabilities ( decrease with an increase of [HSO4
−], showing a successive formation of Rf sulfate complexes. Rf exhibits a weaker complex formation tendency compared to the lighter homologues Zr and Hf. This is in good agreement with theoretical predictions including relativistic effects.
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Sato T, Toyoshima A, Hiraki T, Ohta Y, Katayama K, Arai T, Tazaki H. Effects of metformin on plasma concentrations of glucose and mannose, G6Pase and PEPCK activity, and mRNA expression in the liver and kidney of chickens. Br Poult Sci 2011; 52:273-7. [DOI: 10.1080/00071668.2011.560595] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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58
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Li ZJ, Toyoshima A, Tsukada K, Nagame Y. Ion-exchange behavior of Zr and Hf as homologues of element 104, Rf, in H2SO4 and H2SO4/HClO4 mixed solutions. RADIOCHIM ACTA 2010. [DOI: 10.1524/ract.2010.1681] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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59
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Kasamatsu Y, Toyoshima A, Asai M, Tsukada K, Li Z, Ishii Y, Toume H, Sato TK, Kikuchi T, Nishinaka I, Nagame Y, Haba H, Kikunaga H, Kudou Y, Oura Y, Akiyama K, Sato W, Ooe K, Fujisawa H, Shinohara A, Goto SI, Hasegawa T, Kudo H, Nanri T, Araki M, Kinoshita N, Yokoyama A, Fan F, Qin Z, Düllmann CE, Schädel M, Kratz JV. Anionic Fluoro Complex of Element 105, Db. CHEM LETT 2009. [DOI: 10.1246/cl.2009.1084] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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60
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Akiyama K, Haba H, Sueki K, Tsukada K, Asai M, Toyoshima A, Nagame Y, Katada M. 225Ac Metallofullerene: Toward225Ac Nanogenerator in Fullerene. CHEM LETT 2009. [DOI: 10.1246/cl.2009.978] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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61
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Haba H, Tsukada K, Asai M, Toyoshima A, Ishii Y, Toume H, Sato T, Nishinaka I, Ichikawa T, Ichikawa S, Nagame Y, Sato W, Matsuo K, Kitamoto Y, Tashiro Y, Shinohara A, Saito J, Ito M, Ikezawa T, Sakamaki M, Goto S, Kudo H, Kikunaga H, Arai M, Kamataki S, Yokoyama A, Akiyama K, Sueki K, Oura Y, Schädel M, Brüchle W, Kratz JV. Extraction behavior of rutherfordium into tributylphosphate from hydrochloric acid. RADIOCHIM ACTA 2009. [DOI: 10.1524/ract.2007.95.1.1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The extraction behavior of rutherfordium (Rf) into tributylphosphate (TBP) from hydrochloric acid (HCl) has been studied together with those of the lighter group-4 elements Zr and Hf. The extractability of261Rf,169Hf, and85Zr into TBP was investigated under identical conditions in 7.2–8.0 M HCl by on-line reversed-phase extraction chromatography. The percent extractions of Rf, Hf, and Zr into the TBP resin increase steeply with increasing HCl concentration, and the order of extraction is Zr > Hf ≈ Rf. By considering the order of chloride complexation among these elements, it is suggested that the stability of the TBP complex of Rf tetrachloride is lower than those of Zr and Hf.
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Toyoshima A, Kasamatsu Y, Tsukada K, Asai M, Kitatsuji Y, Ishii Y, Toume H, Nishinaka I, Haba H, Ooe K, Sato W, Shinohara A, Akiyama K, Nagame Y. Oxidation of element 102, nobelium, with flow electrolytic column chromatography on an atom-at-a-time scale. J Am Chem Soc 2009; 131:9180-1. [PMID: 19514720 DOI: 10.1021/ja9030038] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report here on the successful oxidation of element 102, nobelium (No), on an atom-at-a-time scale in 0.1 M alpha-hydroxyisobutyric acid (alpha-HIB) solution using a newly developed technique, flow electrolytic column chromatography. It is found that the most stable ion, No(2+), is oxidized to No(3+) within 3 min and that the oxidized No complex with alpha-HIB holds the trivalent state in the column above an applied potential of 1.0 V.
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Haba H, Akiyama K, Tsukada K, Asai M, Toyoshima A, Yaita T, Hirata M, Sueki K, Nagame Y. Chloride Complexation of Zr and Hf in HCl Investigated by Extended X-ray Absorption Fine Structure Spectroscopy: Toward Characterization of Chloride Complexation of Element 104, Rutherfordium (Rf). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2009. [DOI: 10.1246/bcsj.82.698] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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64
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Akiyama K, Haba H, Tsukada K, Asai M, Toyoshima A, Sueki K, Nagame Y, Katada M. A metallofullerene that encapsulates 225Ac. J Radioanal Nucl Chem 2009. [DOI: 10.1007/s10967-009-0522-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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65
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Kasamatsu Y, Toyoshima A, Haba H, Toume H, Tsukada K, Akiyama K, Yoshimura T, Nagame Y. Adsorption of Nb, Ta and Pa on anion-exchanger in HF and HF/HNO3 solutions: Model experiments for the chemical study of Db. J Radioanal Nucl Chem 2009. [DOI: 10.1007/s10967-007-7320-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tsukada K, Haba H, Asai M, Toyoshima A, Akiyama K, Kasamatsu Y, Nishinaka I, Ichikawa S, Yasuda K, Miyamoto Y, Hashimoto K, et al.. Adsorption of Db and its homologues Nb and Ta, and the pseudo-homologue Pa on anion-exchange resin in HF solution. RADIOCHIM ACTA 2009. [DOI: 10.1524/ract.2009.1577] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ishii Y, Toyoshima A, Tsukada K, Asai M, Toume H, Nishinaka I, Nagame Y, Miyashita S, Mori T, Suganuma H, Haba H, Sakamaki M, Goto SI, Kudo H, Akiyama K, Oura Y, Nakahara H, Tashiro Y, Shinohara A, Schädel M, Brüchle W, Pershina V, Kratz JV. Fluoride Complexation of Element 104, Rutherfordium (Rf), Investigated by Cation-exchange Chromatography. CHEM LETT 2008. [DOI: 10.1246/cl.2008.288] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Toyoshima A, Haba H, Tsukada K, Asai M, Akiyama K, Goto S, Ishii Y, Nishinaka I, Sato TK, Nagame Y, Sato W, Tani Y, Hasegawa H, Matsuo K, Saika D, Kitamoto Y, Shinohara A, Ito M, Saito J, Kudo H, Yokoyama A, Sakama M, Sueki K, Oura Y, Nakahara H, Schädel M, Brüchle W, Kratz JV. Hexafluoro complex of rutherfordium in mixed HF/HNO3 solutions. RADIOCHIM ACTA 2008. [DOI: 10.1524/ract.2008.1474] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Nagame Y, Tsukada K, Asai M, Toyoshima A, Akiyama K, Ishii Y, Kaneko-Sato T, Hirata M, Nishinaka I, Ichikawa S, Haba H, Enomoto S. Chemical studies on rutherfordium (Rf) at JAERI. RADIOCHIM ACTA 2007. [DOI: 10.1524/ract.2005.93.9-10.519] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
SummaryChemical studies on element 104, rutherfordium (Rf), at JAERI (Japan Atomic Energy Research Institute) are reviewed. The transactinide nuclide261Rf has been produced in the reaction248Cm(18O, 5n) at the JAERI tandem accelerator with the production cross section of about 13 nb. On-line anion-exchange experiments on Rf together with the lighter homologues, group-4 elements Zr and Hf, in acidic solutions have been conducted with a rapid ion-exchange separation apparatus. From the systematic study of the anion-exchange behavior of Rf, it has been found that the properties of Rf in HCl and HNO3solutions are quite similar to those of Zr and Hf, definitely confirming that Rf is a member of the group-4 elements. However, we have observed an unexpected chemical behavior of Rf in HF solutions; the fluoride complex formation of Rf is significantly different from those of the homologues. Prospects of extending chemical studies on transactinide elements in the near future at JAERI are briefly considered.
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Kasamatsu Y, Toyoshima A, Toume H, Tsukada K, Haba H, Nagame Y. Anion-exchange Behavior of Nb, Ta, and Pa as Homologues of Db in HF/HNO3 Solutions. ACTA ACUST UNITED AC 2007. [DOI: 10.14494/jnrs2000.8.69] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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71
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Sato TK, Tsukada K, Asai M, Akiyama K, Haba H, Toyoshima A, Ono S, Hirai T, Goto S, Ichikawa S, Nagame Y, Kudo H. Simultaneous Observation of Volatility of Zr, Hf, and Rf Chlorides. ACTA ACUST UNITED AC 2005. [DOI: 10.14494/jnrs2000.6.2_n1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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72
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Haba H, Tsukada K, Asai M, Toyoshima A, Akiyama K, Nishinaka I, Hirata M, Yaita T, Ichikawa SI, Nagame Y, Yasuda KI, Miyamoto Y, Kaneko T, Goto SI, Ono S, Hirai T, Kudo H, Shigekawa M, Shinohara A, Oura Y, Nakahara H, Sueki K, Kikunaga H, Kinoshita N, Tsuruga N, Yokoyama A, Sakama M, Enomoto S, Schädel M, Brüchle W, Kratz JV. Fluoride Complexation of Element 104, Rutherfordium. J Am Chem Soc 2004; 126:5219-24. [PMID: 15099106 DOI: 10.1021/ja031824u] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Fluoride complexation of element 104, rutherfordium (Rf), produced in the 248Cm(18O,5n)261Rf reaction has been studied by anion-exchange chromatography on an atom-at-a-time scale. The anion-exchange chromatographic behavior of Rf was investigated in 1.9-13.9 M hydrofluoric acid together with those of the group-4 elements Zr and Hf produced in the 18O-induced reactions on Ge and Gd targets, respectively. It was found that the adsorption behavior of Rf on anion-exchange resin is quite different from those of Zr and Hf, suggesting the influence of relativistic effects on the fluoride complexation of Rf.
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Toyoshima A, Haba H, Tsukada K, Asai M, Akiyama K, Nishinaka I, Nagame Y, Saika D, Matsuo K, Sato W, Shinohara A, Ishizu H, Ito M, Saito J, Goto S, Kudo H, Kikunaga H, Kinoshita N, Kato C, Yokoyama A, Sueki K. Elution Curve of Rutherfordium (Rf) in Anion-Exchange Chromatography with Hydrofluoric Acid Solution. ACTA ACUST UNITED AC 2004. [DOI: 10.14494/jnrs2000.5.45] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Toyoshima A, Tsukada K, Haba H, Asai M, Goto S, Akiyama K, Nishinaka I, Ichikawa S, Nagame Y, Shinohara A. J Radioanal Nucl Chem 2003; 255:485-487. [DOI: 10.1023/a:1022520113173] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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75
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Nagame Y, Asai M, Haba H, Tsukada K, Goto S, Sakama M, Nishinaka I, Toyoshima A, Akiyama K, Ichikawa S. Status and Prospects of Heavy Element Nuclear Chemistry Research at JAERI. ACTA ACUST UNITED AC 2002. [DOI: 10.14494/jnrs2000.3.129] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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