76
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Matsunaga T, Akola J, Kohara S, Honma T, Kobayashi K, Ikenaga E, Jones RO, Yamada N, Takata M, Kojima R. From local structure to nanosecond recrystallization dynamics in AgInSbTe phase-change materials. NATURE MATERIALS 2011; 10:129-134. [PMID: 21217690 DOI: 10.1038/nmat2931] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2010] [Accepted: 11/19/2010] [Indexed: 05/30/2023]
Abstract
Phase-change optical memories are based on the astonishingly rapid nanosecond-scale crystallization of nanosized amorphous 'marks' in a polycrystalline layer. Models of crystallization exist for the commercially used phase-change alloy Ge(2)Sb(2)Te(5) (GST), but not for the equally important class of Sb-Te-based alloys. We have combined X-ray diffraction, extended X-ray absorption fine structure and hard X-ray photoelectron spectroscopy experiments with density functional simulations to determine the crystalline and amorphous structures of Ag(3.5)In(3.8)Sb(75.0)Te(17.7) (AIST) and how they differ from GST. The structure of amorphous (a-) AIST shows a range of atomic ring sizes, whereas a-GST shows mainly small rings and cavities. The local environment of Sb in both forms of AIST is a distorted 3+3 octahedron. These structures suggest a bond-interchange model, where a sequence of small displacements of Sb atoms accompanied by interchanges of short and long bonds is the origin of the rapid crystallization of a-AIST. It differs profoundly from crystallization in a-GST.
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77
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Jiang HL, Lin QP, Akita T, Liu B, Ohashi H, Oji H, Honma T, Takei T, Haruta M, Xu Q. Ultrafine Gold Clusters Incorporated into a Metal-Organic Framework. Chemistry 2010; 17:78-81. [DOI: 10.1002/chem.201002088] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Indexed: 11/12/2022]
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78
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Higuchi M, Hatta K, Honma T, Hitomi YH, Kambayashi Y, Hibino Y, Matsuzaki I, Sasahara S, Nakamura H. Association between altered systemic inflammatory interleukin-1beta and natural killer cell activity and subsequently agitation in patients with Alzheimer disease. Int J Geriatr Psychiatry 2010; 25:604-11. [PMID: 19728317 DOI: 10.1002/gps.2381] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Alzheimer's disease (AD) is a neurodegenerative disorder that is the most common cause of dementia in the elderly and is frequently accompanied by emotional disorder, including agitation. Although evidence of neuroendocrine immune and inflammatory functions during emotional changes has been accumulated, the pathogenic mechanisms in the development of agitation accompanied by AD remain to be elucidated. METHODS To clarify the involvement of neuroendocrine and immune and inflammatory systems in agitation in AD, we examined agitation levels, circadian rhythms of behavior, cortisol, interleukin-1beta (IL-1beta), and natural killer cell activity (NKCA) in controls without dementia and 16 AD patients who were recognized to be easily agitated in their nursing homes. These behavioral and blood indicators were assessed according to the progress of the stage of agitation in 16 AD patients (stable, pre-agitation, and agitation stages). RESULTS Elevations in night behavior and blood cortisol, IL-1beta and an reduced blood NKCA level in the evening were observed not only in the agitation stage, but also when stable in AD patients as compared to the control. Increased IL-1beta and decreased NKCA occurred in both the morning and evening in pre-agitation and agitation stages in AD. CONCLUSIONS The increased IL-1beta and decreased NKCA with the progress of agitation in AD suggest that inflammation produces agitation and aggravates AD.
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79
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Okumura K, Matsui H, Tomiyama T, Sanada T, Honma T, Hirayama S, Niwa M. Highly Dispersed Pd Species Active in the SuzukiâMiyaura Reaction. Chemphyschem 2009; 10:3265-72. [DOI: 10.1002/cphc.200900711] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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80
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Okumura K, Matsui H, Sanada T, Arao M, Honma T, Hirayama S, Niwa M. Generation of the active Pd cluster catalyst in the Suzuki–Miyaura reactions: Effect of the activation with H2 studied by means of quick XAFS. J Catal 2009. [DOI: 10.1016/j.jcat.2009.04.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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81
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Ebina H, Hatakeyama J, Onodera M, Honma T, Kamakura S, Shimauchi H, Sasano Y. Micro-CT analysis of alveolar bone healing using a rat experimental model of critical-size defects. Oral Dis 2009; 15:273-80. [DOI: 10.1111/j.1601-0825.2009.01522.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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82
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Oikawa T, Honma T, Komatsu T. Laser-induced crystal growth of nonlinear optical Ba3Ti3O6(BO3)2on glass surface. CRYSTAL RESEARCH AND TECHNOLOGY 2008. [DOI: 10.1002/crat.200800253] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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83
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Ina Y, Sasano Y, Akiba N, Hatori K, Honma T, Sasaki K. Root development of rat tooth germs implanted in the tooth socket and in the subcutaneous tissue. Oral Dis 2008; 14:644-51. [DOI: 10.1111/j.1601-0825.2008.01450.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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84
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Honma T, Itagaki T, Nakamura M, Kamakura S, Takahashi I, Echigo S, Sasano Y. Bone formation in rat calvaria ceases within a limited period regardless of completion of defect repair. Oral Dis 2008; 14:457-64. [DOI: 10.1111/j.1601-0825.2007.01401.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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85
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Maruyama N, Honma T, Komatsu T. Electronic polarizability and Judd–Ofelt parameters of Nd3+ and Er3+ ions in transparent crystallized glasses with nonlinear optical Ba2TiSi2O8 nanocrystals. J Chem Phys 2008; 128:184706. [DOI: 10.1063/1.2908231] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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86
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Kusatsugu M, Kanno M, Honma T, Komatsu T. Spatially selected synthesis of LaF3 and Er3+-doped CaF2 crystals in oxyfluoride glasses by laser-induced crystallization. J SOLID STATE CHEM 2008. [DOI: 10.1016/j.jssc.2008.02.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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87
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Hojo S, Honma T, Muramatsu M, Sakamoto Y, Sugiura A. Development of gas pulsing system for electron cyclotron resonance ion source. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:02A306. [PMID: 18315096 DOI: 10.1063/1.2805233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A gas-pulsing system for an electron cyclotron resonance ion source with all permanent magnets (Kei2 source) at NIRS has been developed and tested. The system consists of a small vessel (30 ml) to reserve CH(4) gas and two fast solenoid valves that are installed at both sides of the vessel. They are connected to each other and to the Kei2 source by using a stainless-steel pipe (4 mm inner diameter), where the length of the pipe from the valve to the source is 60 cm and the conductance is 1.2 l/s. From the results of the test, almost 300 e microA for a pulsed (12)C(4+) beam was obtained at a Faraday cup in an extraction-beam channel with a pressure range of 4000 Pa in the vessel. At this time, the valve has an open time of 10 ms and the delay time between the valve open time and the application of microwave power is 100 ms. In experiments, the conversion efficiency for input CH(4) molecules to the quantity of extracted (12)C(4+) ions in one beam pulse was found to be around 3% and the ratio of the total amount of the gas requirement was only 10% compared with the case of continuous gas provided in 3.3 s of repetition in HIMAC.
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88
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Yokouchi J, Shinjyou H, Itou S, Oka Y, Honma T, Katou T, Yokohari T, Wakabayashi Y. 5562 POSTER FDG-PET/CT delayed imaging for detection of recurrent head and neck carcinoma after radiotherapy. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)71279-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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89
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Saxey DW, Cairney JM, McGrouther D, Honma T, Ringer SP. Atom probe specimen fabrication methods using a dual FIB/SEM. Ultramicroscopy 2007; 107:756-60. [PMID: 17482366 DOI: 10.1016/j.ultramic.2007.02.024] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A dual FIB/SEM provides solutions to many challenges in atom probe specimen preparation. When combined with an in situ lift-out capability, the versatility of this tool allows almost any region of interest, in almost any geometry, to be placed at the apex of a specimen tip. Several preparation techniques have been developed in response to specific application requirements; for example, in cases where materials are not suitable for electropolishing, or where site-specific analysis is required. Two general techniques, with wide-ranging potential applications, are described in detail here. The first is a 'cut-out' technique that provides a relatively quick means of micro-tip specimen preparation from bulk material samples. The second method is a 'lift-out' technique that can be used in an in situ or ex situ mode and does not require the preparation of pre-sharpened mounting points.
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90
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Akai T, Shigeiwa M, Okamoto K, Shimomura Y, Kijima N, Honma T. XAFS Analysis of Local Structure around Ce in Ca3Sc2Si3O12:Ce Phosphor for White LEDs. ACTA ACUST UNITED AC 2007. [DOI: 10.1063/1.2644534] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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91
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Kobayashi K, Miyagawa M, Wang R, Suda M, Sekiguchi S, Honma T. Effects of gestational exposure to 2,2′,4,4′,5,5′-hexachlorobiphenyl on postnatal development and thyroidal status in rat offspring. Toxicol Lett 2006. [DOI: 10.1016/j.toxlet.2006.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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92
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Nakahira A, Okajima T, Honma T, Yoshioka S, Tanaka I. Arsenic Removal by Hydroxyapatite-based Ceramics. CHEM LETT 2006. [DOI: 10.1246/cl.2006.856] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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93
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Nakahira A, Murakami T, Ohta M, Honma T, Kudo T. Ce and Y Local Structures of High-performance ZrO 2Composites Codoped with Ce and Y for Implant Applications. CHEM LETT 2006. [DOI: 10.1246/cl.2006.874] [Citation(s) in RCA: 2] [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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94
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Honma T, Honmou O, Iihoshi S, Harada K, Houkin K, Hamada H, Kocsis J. Intravenous infusion of immortalized human mesenchymal stem cells protects against injury in a cerebral ischemia model in adult rat. Exp Neurol 2005; 199:56-66. [PMID: 15967439 PMCID: PMC2605388 DOI: 10.1016/j.expneurol.2005.05.004] [Citation(s) in RCA: 181] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2004] [Revised: 03/23/2005] [Accepted: 05/04/2005] [Indexed: 12/16/2022]
Abstract
Intravenous infusion of bone marrow cells has demonstrated therapeutic efficacy in animal models of cerebral ischemia and spinal cord injury. We intravenously delivered human mesenchymal stem cells (SH2+, SH3+, CD34-, and CD45-) immortalized with a human-telomerase gene (hTERT-MSCs) and transfected with eGFP or LacZ into rats 12 h after induction of transient middle cerebral artery occlusion (MCAO), to study their potential therapeutic benefit. hTERT-MSCs were delivered at 12 h after lesion induction. Lesion size was assessed using MR imaging and spectroscopy, and histological methods. Functional outcome was assessed using the Morris water maze and a treadmill test. Intravenous delivery of hTERT-MSCs reduced lesion volume and the magnitude of the reduction and functional improvement was positively correlated with the number of cells injected. The reduction of lesion size could be assessed in vivo with MRI and MRS and was correlated with subsequent histological examination of the brain. This work demonstrates that highly purified hTERT-MSCs reduce cerebral infarction volume and improve functional outcome.
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95
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Hata F, Hirata K, Sasaki K, Tsuruma T, Furuhata T, Nishimori H, Honma T, Yasoshima T. Efficacy of continuous venous infusion of fluorouracil and consecutive low-dose cisplatin as adjuvant treatment in resectable colorectal cancer: a prospectively randomized trial. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.3696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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96
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Sano M, Nakanishi Y, Yagasaki H, Honma T, Oinuma T, Obana Y, Suzuki A, Nemoto N. Overexpression of anti-apoptotic Mcl-1 in testicular germ cell tumours. Histopathology 2005; 46:532-9. [PMID: 15842635 DOI: 10.1111/j.1365-2559.2005.02118.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To determine the expression of Mcl-1 in testicular germ cell tumours in order to clarify the role of this anti-apoptotic factor in these tumours. Various members of the Bcl-2 family have been implicated in the apoptotic mechanisms regulating germ cell apoptosis. Mcl-1 is an anti-apoptotic Bcl-2 family member and has recently been reported to be related to the progression of malignancy; however, the involvement of Mcl-1 in the development of germ cell tumours is still unknown. METHODS AND RESULTS Mcl-1 expression in testicular germ cell tumours was investigated by immunohistochemistry and reverse transcriptase-polymerase chain reaction (RT-PCR). By immunohistochemistry, overexpression of Mcl-1 was present in all germ cell tumours that were studied, including embryonal carcinoma and yolk sac tumour, as well as choriocarcinoma and teratoma. In teratomas, Mcl-1 was widely distributed in the epithelial, myogenic, neural and mesenchymal components. RT-PCR analysis after microdissection revealed high levels of Mcl-1 mRNA in all tumour variants compared with non-neoplastic germ cells. CONCLUSION Overexpression of anti-apoptotic Mcl-1 may function to enhance the viability of testicular germ cells, thereby leading to tumorigenesis.
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97
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Takatsuka T, Hirano J, Matsumoto H, Honma T. X-Ray absorption fine structure analysis of the local environment of zinc in dentine treated with zinc compounds. Eur J Oral Sci 2005; 113:180-3. [PMID: 15819827 DOI: 10.1111/j.1600-0722.2005.00194.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
It has been reported that zinc oxide (ZnO) inhibits dentine demineralization. By using the X-ray absorption fine structure (XAFS) technique, our aims in this study were to provide information about the local environment of zinc atoms in dentine that had been treated with zinc compounds. We measured the Zn K-edge X-ray absorption near-edge structure (XANES) and the extended X-ray absorption fine structure (EXAFS) of dentine specimens treated with zinc chloride or ZnO. In XAFS analyses, the spectra of dentine specimens treated with ZnO (D-ZO) or with zinc chloride (D-ZC) were similar and obviously different from the reference ZnO spectrum. This suggests that most of the zinc atoms detected in D-ZO are not derived from particles of ZnO. The spectra of D-ZO and D-ZC were similar to the spectrum of the synthetic, zinc-containing hydroxyapatite, but were not similar to that of zinc in ZnCl2-treated collagen. The results of this study suggest that most of the zinc atoms detected were attached to hydroxyapatite and not to collagen.
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98
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Hashimoto M, Emura S, Asano R, Tanaka H, Teraguchi N, Suzuki A, Nanishi Y, Honma T, Umesaki N, Asahi H. Local structure of rare-earth-doped diluted magnetic semiconductor GaGdN. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/pssc.200303320] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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99
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Tanaka H, Hashimoto M, Emura S, Yanase A, Asano R, Zhou Y, Bang H, Akimoto K, Honma T, Umesaki N, Asahi H. Magnetic properties of the rare‐earth‐doped semiconductor GaEuN. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/pssc.200303516] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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100
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Kobayashi K, Miyagawa M, Wang R, Suda M, Sekiguchi S, Honma T. 654 Pituitary-thyroid axis in the postnatal rat offspring following gestational and lactational exposure to bisphenol A. Toxicol Lett 2003. [DOI: 10.1016/s0378-4274(03)90653-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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