Search Results - (Author, Cooperation:M. Ebihara)

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  1. 1
    Staff View
    Publication Date:
    2011-08-27
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2011-08-27
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Staff View
    Publication Date:
    2011-08-27
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Staff View
    Publication Date:
    2011-08-27
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  5. 5
    Sarangi, S. ; Sarkar, A. ; Sarin, M. M. ; Bhattacharya, S. K. ; Ebihara, M. ; Ray, A. K.

    Oxford UK : Blackwell Science Ltd
    Published 2001
    Staff View
    ISSN:
    1365-3121
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Geosciences
    Notes:
    The problem of growth rate and life span of Nummulites foraminifers, attaining giant sizes during the Eocene, has been addressed by analysing their Sr/Ca ratio across the Eocene/Oligocene Boundary (EOB) of Kutch, western India. The Eocene ratio (˜ 1) rapidly decreases during the Oligocene (˜ 0.5) and is coincident with the extinction of most of the Eocene Nummulites species, a rapid enrichment of δ18O and decrease in both test size and species diversity across the boundary. The high Sr/Ca ratio in Eocene foraminifers can be explained by their rapid growth under a favourable climatic condition. The climatic deterioration (e.g. δ18O cooling) across the boundary and during the early Oligocene possibly forced the Nummulites to adopt a slower growth rate (and stunted growth). The rapid growth of the Eocene Nummulites indicates that the giant sizes of these protists need not necessarily involve a large life span.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1046/j.1365-3121.2001.00349.x

    Articles: DFG German National Licenses
  6. 6
    Ito, M. ; Ebihara, M. ; Kawamura, T.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0020-1693
    Keywords:
    Aquo complexes ; Bicarbonato complexes ; Crystal structures ; Platinum complexes
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0020-1693(94)03802-3

    Articles: DFG German National Licenses
  7. 7
    Tanaka, H.K. ; Sasaki, Y. ; Ebihara, M. ; Saito, K.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0020-1693
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/S0020-1693(00)90116-6

    Articles: DFG German National Licenses
  8. 8
    Ebihara, M. ; Honda, M.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0012-821X
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Geosciences
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0012-821X(83)90116-4

    Articles: DFG German National Licenses
  9. 9
    Hidaka, H. ; Sugiyama, T. ; Ebihara, M. ; Holliger, P.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0012-821X
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Geosciences
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1016/0012-821X(94)90058-2

    Articles: DFG German National Licenses
  10. 10
    Goto, J. ; Suzaki, K. ; Ebihara, M. ; Nambara, T. ; Masu, A.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0378-4347
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0378-4347(85)80161-4

    Articles: DFG German National Licenses
  11. 11
    Staff View
    ISSN:
    1434-601X
    Keywords:
    PACS. 23.60.+e α-decay – 27.90.+b 220 ? A
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract: The new neutron-deficient americium isotope 233Am produced via the 233U( 6Li, 6n) reaction has been identified using the JAERI on-line isotope separator (JAERI-ISOL) coupled to a gas-jet transport system. The α-decay of 233Am and its subsequent α-decay chain have been observed in the mass-233 fraction. The half-life and α-particle energy of 233Am have been determined to be 3.2±0.8 min and 6780±17 keV, respectively. From these results and a deduced α-decay branching ratio, the observed α-decay is regarded as a favored transition.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s100500070013

    Articles: DFG German National Licenses
  12. 12
    Watanabe, R. ; Ebihara, M. ; Otsuka, F. ; Onodera, K. ; Ishibashi, Y.
    Springer
    Published 1993
    Staff View
    ISSN:
    1432-069X
    Keywords:
    Tuberous sclerosis ; Restriction fragment length polymorphisms ; Polymerase chain reaction ; Gene mutation
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract Although tuberous sclerosis is supposed to be a phacomatosis inherited as an autosomal dominant trait, many cases develop without any affected parents or grandparents. In recent years, many vigorous investigations have been concentrated on finding the mutant gene, and possible candidate genes have been mapped on 9q34 and other chomosomes. In order to find a way of diagnosing asymptomatic carriers or patients, we tried to detect restriction fragment length polymorphisms (RFLPs) using the technique of polymerase chain reaction (PCR). We used a probe, MCOA12, which is located on 9q34 and has been known to show RFLPs in Caucasian tuberous sclerosis patients. However, we could not find a correlation between the phenotype and RFLP pattern in seven of eight families.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01112916

    Articles: DFG German National Licenses
  13. 13
    Ebihara, M. ; Tomura, K. ; Masutani, M.
    Springer
    Published 1987
    Staff View
    ISSN:
    1588-2780
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Chemistry and Pharmacology
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract We determined uranium in silicate materials such as standard rocks and a meteorite by radiochemical neutron activation analysis. After activation with a cadmium cover, samples were subjected to radiochemical separation of uranium immediately. The gamma-ray intensity of239U was measured with a planar type pure germanium detector system. Our data are mostly consistent with the literature or reported values. Compared with a non-destructive method, the present method was found to improve the sensitivity by at least a factor of ten. Several errors which might be involved in our RNAA procedures were examined and their degrees were evaluated.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02117524

    Articles: DFG German National Licenses
  14. 14
    Ozaki, H. ; Ebihara, M. ; Nakahara, H.
    Springer
    Published 1994
    Staff View
    ISSN:
    1588-2780
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Chemistry and Pharmacology
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract Simple and effective procedures for the determination of Re, Os and Ir by radiochemical neutron activation analysis are presented. Those elements are separated individually by distillation (for Os) and anion exchange techniques (for Re and Ir) for a single specimen. Reproducibilities of the data obtained by the present procedures are evaluated by replicate analyses of the Allende meteorite sample, and are deduced to be 3% for Re, 6% for Os and 4% for Ir (1σ). Detection limits for the present procedures are calculated to be 1 ppb for Re, 20 ppb for Os and 5 ppb for Ir. These procedures were applied to Antarctic meteorites and proved to work very effectively for the determination of trace Re, Os and Ir in chondrite meteorites.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02042947

    Articles: DFG German National Licenses
  15. 15
    Ebihara, M. ; Fukatsu, S. ; Hirano, K. ; Ozaki, H.
    Springer
    Published 1994
    Staff View
    ISSN:
    1588-2780
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Chemistry and Pharmacology
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract For the determination of trace Cu, Zn and In in rock samples, a simple and convenient scheme of RNAA is presented. In this scheme, relatively short-lived nuclides,64Cu,69mZn and116mIn are radiochemically purified immediately after the irradiation of samples. Although the sensitivity for Zn and In is lower in this scheme than that in the RNAA using65Zn and114mIn at a higher neutron fluence, the present radiochemical procedures are simpler and were proved to be highly effective for the determination of these elements in most terrestrial igneous rocks and meteorite samples.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02037505

    Articles: DFG German National Licenses
  16. 16
    Staff View
    ISSN:
    1588-2780
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Chemistry and Pharmacology
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract An internal monostandard method for PGAA is proposed for completely non-destructive analysis of elements in bulky samples by the use of a neutron beam guided out from the reactor. The method is essentially the same as the k 0 method except that it corrects for the change of relative γ-ray counting efficiencies caused by the absorption and scattering of neutrons and absorption of γ-rays within the sample. Some examples of applications to archaeological samples of earthen wares, bronze mirrors, and to voluminous meteorite samples are demonstrated, and its future application to the in-situ studies of distribution and metabolism of a certain elements in animals is also explained.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1023/A:1006752129650

    Articles: DFG German National Licenses
  17. 17
    Ebihara, M. ; Ozaki, H. ; Kato, F. ; Nakahara, H.
    Springer
    Published 1997
    Staff View
    ISSN:
    1588-2780
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Chemistry and Pharmacology
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract Chlorine, bromine and iodine (hereafter, halogens) were detemined for rock samples by radiochemical neutron activation analysis. The powdered samples and reference standards prepared from chemical reagents were simultaneously irradiated for 10 to 30 minutes with or without a cadmium filter in a TRIGA-II reactor at the Institute for Atomic Energy, Rikkyo University. The samples were subjected to radiochemical procedures of halogens immediately after the irradiation. Iodine was firstly precipitated as PdI2, and chlorine and bromine were successively precipitated as Ag-halides at the same time. In this study, geological standard rocks, sedimentary rocks and meteorites were analyzed for trace halogens. In some Antarctic meteorites, iodine contents were observed to be anomalously high. Chlorine contents also are somewhat high. The overabundance of iodine and chlorine must be caused by terrestrial contamination on the Antarctica.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02034504

    Articles: DFG German National Licenses
  18. 18
    Staff View
    ISSN:
    1588-2780
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Chemistry and Pharmacology
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract Neutron-induced prompt gamma-ray analysis (PGA) was applied to seven meteorite samples (Allende, Zagami, Acfer 209, ALH77005, ALH84001, EET79001 and Neagari). Samples were irradiated in both the thermal neutron and the cold neutron guided beams of JRR-3M at JAERI. Multiple samples of an Allende standard powder were analyzed for Si using two different methods: (1) the comparison method, using a Si standard, and (2) the mono-standard method, using Fe as an internal reference element. The Si concentrations determined by these two methods are in good agreement with literature values. The analytical sensitivity for Si using the cold neutron guided beam is∼14.3× higher than that for the thermal neutron guided beam. Other elements determined (B, Ca, Ti and S) also showed higher sensitivities using the cold neutron beam. The other meteorites studied showed some anomalous B and S values likely due to the effects of terrestrial weathering/contamination.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02349072

    Articles: DFG German National Licenses
  19. 19
    Ebihara, M. ; Saito, N. ; Akaiwa, H.
    Springer
    Published 1987
    Staff View
    ISSN:
    1588-2780
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Chemistry and Pharmacology
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract Applying rapid radiochemical separation of iodine coupled with epithermal neutron activation, we reliably determined trace amounts /6–95 ng/ of iodine in rock samples such as sedimentary rocks and chondritic meteorites. Our data on meteorites are in good agreement with literature values, but for sedimentary rocks the present data were systematically lower than the literature values. Based on the data from duplicate analyses of some sedimentary rocks and the results of tracer experiments employed parallel to the rock analyses, we concluded that the analytical results obtained in this work for sedimentary rocks were more reliable than the literature values.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02164858

    Articles: DFG German National Licenses
  20. 20
    Staff View
    ISSN:
    1588-2780
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Chemistry and Pharmacology
    Energy, Environment Protection, Nuclear Power Engineering
    Notes:
    Abstract Chondritic meteorite samples were analyzed nondestructively by photon activation analysis. Powdered samples weighing about 50 mg each were irradiated with photons (γ-rays) converted from electrons accelerated by a linear electron accelerator at 20 and 30 MeV. With 30-minute and 6-hour irradiations, 11 and 12 elements with duplication of 6 elements could be determined, respectively. Considering that several major elements including Mg, Si and Fe can be determined in addition to Ti, Rb, Sr, Y and Zr, which cannot or hardly be determined by instrumental neutron activation analysis (INAA) with rather high sensitivity, instrumental photon activation analysis is as effective as INAA.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1023/A:1006766411304

    Articles: DFG German National Licenses