76
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Itoh K, Mihara Y, Toshima Y, Suyama K. Characterization of microbial consortia that reductively dechlorinate 4-chlorophenol and transform phenol to benzoate enriched from estuarine sediment of Lake Shinji. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2011; 46:181-190. [PMID: 21328126 DOI: 10.1080/03601234.2011.539147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Monochlorophenols were degraded to benzoate via phenol by the initial dechlorination and the subsequent conversion of phenol to benzoate in anaerobic sediment samples of estuarine Lake Shinji under methanogenic conditions. To characterize bacteria that dechlorinate 4-chlorophenol and transform phenol to benzoate, we analyzed the microbial community structure of the enrichment culture with each 4-chlorophenol and phenol by the limiting dilution method with polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) of 16S rRNA gene. After serial dilution of the culture, the 4-chlorophenol-dechlorinating culture consisted of two dominant bacteria, one of which was most homologous with Dehalobacter sp. In the enriched culture with phenol, minor band homologous with Cryptanaerobacter phenolicass corresponded to the transformation activity.
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77
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Yamada T, Itoh SI, Inagaki S, Nagashima Y, Kasuya N, Kamataki K, Arakawa H, Kobayashi T, Yagi M, Fujisawa A, Itoh K. Observation of quasi-two-dimensional nonlinear interactions in a drift-wave streamer. PHYSICAL REVIEW LETTERS 2010; 105:225002. [PMID: 21231392 DOI: 10.1103/physrevlett.105.225002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Indexed: 05/30/2023]
Abstract
A streamer, which is a bunching of drift-wave fluctuations, and its mediator, which generates the streamer by coupling with other fluctuations, have been observed in a cylindrical magnetized plasma. Their radial structures were investigated in detail by using the biphase analysis. Their quasi-two-dimensional structures were revealed to be equivalent with a pair of fast and slow modes predicted by a nonlinear Schrödinger equation based on the Hasegawa-Mima model.
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78
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Sudo M, Mochizuki A, Itoh K, Kirino E. P18-8 Interrelationships among physical performance, language proficiency and brain activities from the viewpoint of social cognition. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60861-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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79
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Senoo Y, Nishizawa N, Sakakibara Y, Sumimura K, Itoga E, Kataura H, Itoh K. Ultralow-repetition-rate, high-energy, polarization-maintaining, Er-doped, ultrashort-pulse fiber laser using single-wall-carbon-nanotube saturable absorber. OPTICS EXPRESS 2010; 18:20673-20680. [PMID: 20940963 DOI: 10.1364/oe.18.020673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
An ultralow-repetition-rate, all-polarization-maintaining (PM), Er-doped, ultrashort-pulse fiber laser was demonstrated using a single-wall-carbon-nanotube polyimide film. Using a ring cavity configuration, output pulses with pulse energy of 0.7-2.6 nJ were obtained at an ultralow repetition rate of 943-154 kHz for a fiber length of 0.1-1.3 km. A novel θ (theta) cavity configuration was proposed, which enabled us to reduce the required fiber length by half. A repetition rate of 132 kHz was achieved using this configuration with 909 m of PM fiber.
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80
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Itoh K, Sugama H, Watanabe TH, Yamagishi O, Toda S, Kasuya N, Kanno R, Nunami M. Microinstabilities, Turbulent Transport, and Structure Formation in Helical Plasmas. FUSION SCIENCE AND TECHNOLOGY 2010. [DOI: 10.13182/fst10-a10812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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81
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Sato H, Matsumoto M, Itoh K, Yamamoto M, Aoki Y. Functional prediction analysis based on global gene expression by using Nrf2 knockout mouse liver exposed to TCDD. Toxicol Lett 2010. [DOI: 10.1016/j.toxlet.2010.03.703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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82
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Nishizawa N, Takahashi K, Ozeki Y, Itoh K. Wideband spectral compression of wavelength-tunable ultrashort soliton pulse using comb-profile fiber. OPTICS EXPRESS 2010; 18:11700-11706. [PMID: 20589029 DOI: 10.1364/oe.18.011700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We demonstrated spectral compression of ultrashort soliton pulses in a wide wavelength region based on an adiabatic soliton spectral compression technique using a comb-profile fiber. The comb-profile fiber was carefully designed using numerical analysis and fabricated using a conventional single-mode fiber and a dispersion-shifted fiber. The spectral width of a 200 fs soliton pulse was compressed from 12 to 15 nm to 0.54-0.71 nm in the wavelength region 1620-1850 nm, giving a spectral compression factor of up to 19.8-25.9. Owing to the soliton effect, the side lobe level was suppressed to -19.2 to -9.7 dB.
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83
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Toh U, Otsuka H, Iwakuma N, Shirouzu K, Ogo E, Yamana H, Itoh K, Tanaka M, Fujii T. A phase II study of personalized selection of peptide vaccines combined with conventional chemo- or endocrine therapy for refractory breast cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.tps173] [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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84
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Igarashi T, Murayama K, Itoh K, Kurosawa M, Nagai H, Watanabe T, Tobinai K. Eight weekly infusions of rituximab (R) for relapsed patients (pts) with indolent B-cell lymphoma mostly pretreated with R: A Japanese multicenter phase II study. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e18510] [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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85
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Noguchi M, Mine T, Komatsu N, Suekane S, Moriya F, Yoshida K, Yutani S, Shichijo S, Yamada A, Itoh K. Assessment of immunological biomarkers in patients with advanced cancer treated by personalized peptide vaccination. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e13043] [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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86
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Amemiya T, Itoh K, Fujishima A. Spectroscopic and Electrochemical Behavior of Polypyrrole Films Incorporating Methylene Blue, and Their Enhancement in Electrochromism. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19890930607] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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87
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Ladygin V, Uesaka T, Azhgirey L, Gurchin Y, Isupov A, Itoh K, Janek M, Karachuk JT, Kawabata T, Khrenov A, Kiselev A, Kizka V, Kurepin A, Kurilkin A, Kurilkin P, Krasnov V, Ladygina N, Lipchinski D, Livanov A, Maeda Y, Malakhov A, Martinska G, Nedev S, Piyadin S, Plekhanov E, Popovichi J, Rangelov S, Reznikov S, Rukoyatkin P, Sakaguchi S, Sakai H, Sasamoto Y, Sekiguchi K, Shikhalev M, Suda K, Terekhin A, Urban J, Vasiliev T, Vnukov I, Witala H. Short-range correlations studies in collisions of polarized nuclei at Nuclotron-M. EPJ WEB OF CONFERENCES 2010. [DOI: 10.1051/epjconf/20100304004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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88
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Mohammad M, Itoh K, Suyama K. Effects of herbicides on Lemna gibba and recovery from damage after prolonged exposure. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2010; 58:605-612. [PMID: 20094883 DOI: 10.1007/s00244-010-9466-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Accepted: 01/02/2010] [Indexed: 05/28/2023]
Abstract
To determine the potential impact of contaminants on the aquatic vascular plants Lemna sp., toxicity tests are usually conducted for a 4- to 14-day exposure, and the toxicity is usually expressed as EC50. However, the effects of longer exposure and the recovery potential after exposure to chemicals are other important factors which should be considered. We present the relative risks of a variety of exposure scenarios and recovery potentials from damage, using herbicides with different modes of action. Toxicity was assessed on the basis of both EC50 and relative growth rate (RGR) compared with untreated controls in exposure and recovery. The EC50 of atrazine was found to be 89 ppb, and its phytostatic concentrations were 1600 and 800 ppb for exposure periods of 14 and 28 days, respectively, and no phytocidal effects were observed up to 3200 ppb for a 28-day exposure. The RGR in recovery was not affected by the RGR in exposure, and regrowth was possible even after complete inhibition of growth for 28 days at the highest concentration tested. Alachlor, with an EC50 of 31 ppb, was phytostatic at 400 ppb for a 14-day exposure and phytocidal at 200 ppb for 21- and 28-day exposures. Paraquat, with an EC50 of 31 ppb, showed phytocidal rather than phytostatic effects. All phytostatic fronds could not grow in the recovery period, and the phytocidal concentration decreased with exposure period, from 80 ppb for a 7-day exposure to 20 ppb for 21- and 28-day exposures. The RGR of alachlor and paraquat in recovery was dependent on the RGR in exposure. In the case of cyclosulfamuron, phytostatic concentrations were 100 and 50 ppb for 7- and 14-day exposures, respectively. In the case of exposures longer than 21 days, however, it exhibited phytocidal activity at 10 ppb. The results of this study suggest that it is important to examine the effects of chemicals over a longer exposure period as well as the recovery potential from damage for reliable ecological risk assessment.
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89
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Lin Z, Zecca M, Sessa S, Sasaki T, Suzuki T, Itoh K, Iseki H, Takanishi A. Objective skill analysis and assessment in neurosurgery by using an ultra-miniaturized inertial measurement unit WB-3--pilot tests. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2010; 2009:2320-3. [PMID: 19965176 DOI: 10.1109/iembs.2009.5335116] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In recent years there has been an ever increasing amount of research and development of technologies and methods to improve the quality and the performance of advanced surgery. In several fields, such as laparoscopy, various training methods and metrics have been proposed, both to improve the surgeon's abilities and also to assess her/his skills. For neurosurgery, however, the extremely small movements and target operating space involved have prevented until now the development of similar methodologies and systems. In this paper we present the development of an ultra-miniaturized Inertial Measurement Unit (IMU) and its application for neurosurgery skill assessment in a simple pick and place scenario. This analysis is a preliminary yet fundamental step to realize a better training/evaluation system for neurosurgeons, and to objectively evaluate and understand how the neurosurgery is performed.
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90
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Itoh K, Higaki H. Estimation of Ad-Hoc Network Topology based on Neighbor Relations among Wireless Nodes. INFORMATICS 2010. [DOI: 10.2316/p.2010.724-029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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91
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Okamura H, Hatanaka K, Ikeda T, Itoh K, Kumasaka H, Maeda Y, Saito T, Sakai H, Sekiguchi K, Suda K, Suzuki R, Uesaka T, Wakasa T, Yako K. Study of breakup mechanism of a loosely bound projectile in a region of Coulomb-breakup dominance. EPJ WEB OF CONFERENCES 2010. [DOI: 10.1051/epjconf/20100306010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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92
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Sugimoto T, Itoh K, Mizuno N. Direct projections from the Ediger-Westphal nucleus to the cerebellum and spinal cord in the cat: an HRP study. Neurosci Lett 2009; 9:17-22. [PMID: 19605187 DOI: 10.1016/0304-3940(78)90041-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/1978] [Accepted: 04/17/1978] [Indexed: 10/27/2022]
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93
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Lelono RAA, Tachibana S, Itoh K. Isolation of antifungal compounds from Gardenia jasminoides. Pak J Biol Sci 2009; 12:949-56. [PMID: 19817121 DOI: 10.3923/pjbs.2009.949.956] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Gardenia jasminoides E. (Rubiaceae) methanol extracts showed the highest level of antifungal activity against Pleurotus ostreatus, a wood-rotting fungus, compared to five other methanol plants extracts; [Thuja orientalis L. (Cupressaceae), Datura innoxia (Solanaceae), Ligustrum japonicum T. (Oleaceae), Juniperus chinensis var. procumbens (Cupressaceae) and Mallotus japonica M. (Euphorbiaceae)] and selected for further analysis. Two antifungal compounds were isolated from n-butanol and ethyl acetate solubles in the methanol extracts of Gardenia jasminoides leaves and stems by bioassay-guided fractionation, using Pleurotus ostreatus. The antifungal compounds found for the first time in Gardenia jasminoides against Pleurotus ostreatus were identified as genipin and geniposide based on instrumental analyses. Both also had potent inhibitory effects on two plant pathogenic fungi; Fusarium oxysporum and Corynespora cassiicola.
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94
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Senoo Y, Nishizawa N, Sakakibara Y, Sumimura K, Itoga E, Kataura H, Itoh K. Polarization-maintaining, high-energy, wavelength-tunable, Er-doped ultrashort pulse fiber laser using carbon-nanotube polyimide film. OPTICS EXPRESS 2009; 17:20233-41. [PMID: 19997248 DOI: 10.1364/oe.17.020233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A high-energy, wavelength-tunable, all-polarization-maintaining Er-doped ultrashort fiber laser was demonstrated using a polyimide film dispersed with single-wall carbon nanotubes. A variable output coupler and wavelength filter were used in the cavity configuration, and high-power operation was demonstrated. The maximum average power was 12.6 mW and pulse energy was 585 pJ for stable single-pulse operation with an output coupling ratio as high as 98.3%. Wide wavelength-tunable operation at 1532-1562 nm was also demonstrated by controlling the wavelength filter. The RF amplitude noise characteristics were examined in terms of their dependence on output coupling ratio and oscillation wavelength.
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95
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Hayashi H, Fujimaki C, Daimon T, Tsuboi S, Matsuyama T, Itoh K. Genetic polymorphisms in folate pathway enzymes as a possible marker for predicting the outcome of methotrexate therapy in Japanese patients with rheumatoid arthritis. J Clin Pharm Ther 2009; 34:355-61. [PMID: 19827168 DOI: 10.1111/j.1365-2710.2009.01046.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Low-dose methotrexate (MTX) therapy is widely used in the treatment of rheumatoid arthritis (RA). Though the difference in response to MTX between patients with RA is large, the factors that contribute to this variability remain unclear. OBJECTIVE We aimed to identify those factors with a particular emphasis on the pharmacogenetics of MTX. METHOD We evaluated the association of possible factors, including genetic polymorphisms of folate metabolic pathway enzymes, with the cumulative value of C-reactive protein, an index of MTX anti-inflammatory efficacy, in 87 Japanese patients with RA. RESULTS Polymorphisms of the reduced folate carrier gene (RFC) G80A and of the gamma-glutamylhydrolase gene (GGH) C-401T were more closely associated (beta = 2.1194, P = 0.0017) than other polymorphisms, with the anti-inflammatory response to MTX. CONCLUSION Patients with RA having RFC 80A and GGH-401T alleles were less responsive to MTX than those with RFC 80A and without GGH-401T alleles. Thus, this data may be useful for guiding treatment of RA patients with MTX.
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96
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Ohshima M, Tadakuma T, Hayashi H, Inoue K, Itoh K. Generation of a recombinant single-chain variable fragment (scFv) targeting 5-methyl-2'-deoxycytidine. J Biochem 2009; 147:135-41. [DOI: 10.1093/jb/mvp151] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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97
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Saito T, Shime N, Itoh K, Fujita N, Saito Y, Shinozaki M, Shibuya K, Makimura K, Hashimoto S. Disseminated Aspergillosis Following Resolution of Pneumocystis Pneumonia with Sustained Elevation of Beta-Glucan in an Intensive Care Unit: a Case Report. Infection 2009; 37:547-50. [PMID: 19730788 DOI: 10.1007/s15010-009-8108-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2008] [Accepted: 03/02/2009] [Indexed: 10/20/2022]
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98
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Ozawa S, Kawashima M, Furuya T, Tsutsumi Y, Isobe A, Fujita T, Kurokawa C, Sugimoto S, Toramatsu C, Itoh K, Karasawa K. QA STRATEGY FOR ELEKTA VMAT AT JUNTENDO UNIVERSITY HOSPITAL. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)73099-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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99
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Momose Y, Maruyama A, Iwasaki T, Miyamoto Y, Itoh K. 16S rRNA gene sequence-based analysis of clostridia related to conversion of germfree mice to the normal state. J Appl Microbiol 2009; 107:2088-97. [PMID: 19614852 DOI: 10.1111/j.1365-2672.2009.04431.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To determine phylogenetic groups of clostridia inhabiting the mouse intestine that are essential for normalization of germfree (GF) mice. METHODS AND RESULTS Using both the culture method and cloning, clostridia inhabiting the mouse intestine were isolated, and phylogenetic analysis based on 16S rRNA gene sequences was carried out. As a result, the isolates were found to have novel sequences, and no isolate was determined to be identical to previously known identified clostridia. Although the taxonomy of mouse intestinal clostridia was complex, many of them belonged to Clostridium clusters XIVa and IV in conventional (CV) and limited flora mice and ex-germfree mice administered chloroform-treated CV mouse faeces. The clostridia that belonged to cluster XIVa were most often present and showed the highest diversity. CONCLUSIONS Clostridia belonging clusters XIVa and IV are dominant in the mouse intestine as in other gut ecosystems. The novel groups in these clusters are essential for normalization of GF mice. SIGNIFICANCE AND IMPACT OF THE STUDY The results of this study can be applied in the strict control of mouse intestinal microbiota and will provide important information for normalization of GF mice and also for research on microbiology of the mouse intestine.
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100
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Hirayama K, Itoh K, Takahashi E, Mitsuoka T. Comparison of Composition of Faecal Microbiota and Metabolism of Faecal Bacteria among 'Human-Flora-Associated' Mice Inoculated with Faeces from Six Different Human Donors. MICROBIAL ECOLOGY IN HEALTH AND DISEASE 2009. [DOI: 10.3109/08910609509140098] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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