Y. Takeda

Publication List Details

Period

1974 - 2009

Number

44

Co-Authors

On Goncharov's regulator and higher arithmetic Chow groups (2009)

Gil, J. I. Burgos, Feliu, E., Takeda, Y.

In this paper we show that the regulator defined by Goncharov from higher algebraic Chow groups to Deligne-Beilinson cohomology agrees with Beilinson's regulator. We give a direct comparison of...

Bulk 5f electronic states in uranium monochalcogenide US (2009)

Takeda, Y., Okane, T., Ohkochi, T., Saitoh, Y., Yamagami, H., Fujimori, A., ...

We have investigated the electronic states of the uranium monochalcogenide US, which is a typical ferromagnetic uranium compound, using soft x-ray photoemission spectroscopy (SX-PES). In early...

Epitaxial Growth of NdFeAsO Thin Films by Molecular Beam Epitaxy (2009)

Kawaguchi, T., Uemura, H., Ohno, T., Watanabe, R., Tabuchi, M., Ujihara, T., ...

Epitaxial films of NdFeAsO were grown on GaAs substrates by molecular beam epitaxy (MBE). All elements including oxygen were supplied from solid sources using Knudsen cells. The x-ray diffraction...

4f-derived Fermi Surfaces of CeRu2(Si[1-x]Ge[x])2 near the Quantum Critical Point: Resonant Soft X-ray ARPES Study (2009)

Okane, T., Ohkochi, T., Takeda, Y., Yasui, A., Saitoh, Y., ...

Angle-resolved photoelectron spectroscopy in the Ce 3d-4f excitation region was measured for the paramagnetic state of CeRu2Si2, CeRu2(Si0.82Ge0.18)2, and LaRu2Si2 to investigate the changes of the...

Electronic structure and magnetism of the diluted magnetic semiconductor Fe-doped ZnO nano-particles (2009)

Kataoka, T., Kobayashi, M., Sakamoto, Y., Song, G. S., Fujimori, A., ...

We have studied the electronic structure of Zn$_{0.9}$Fe$_{0.1}$O nano-particles, which have been reported to show ferromagnetism at room temperature, by x-ray photoemission spectroscopy (XPS),...

Potassium Abundances in Red Giants of Mildly to Very Metal-Poor Globular Clusters (2009)

Takeda, Y., Kaneko, H., Matsumoto, N., Oshino, S., Ito, H., Shibuya, T.

A non-LTE analysis of K I resonance lines at 7664.91 and 7698.97 A was carried out for 15 red giants belonging to three globular clusters of different metallicity (M 4, M 13, and M 15) along with two...

Electronic structure of Ga$_{1-x}$Cr$_{x}$N and Si-doping effects studied by photoemission and X-ray absorption spectroscopy (2008)

Song, G. S., Kobayashi, M., Hwang, J. I., Kataoka, T., Takizawa, M., Fujimori, A., ...

The electronic structure of the magnetic semiconductor Ga$_{1-x}$Cr$_{x}$N and the effect of Si doping on it have been investigated by photoemission and soft x-ray absorption spectroscopy. We have...

Systematic changes of the electronic structure of the diluted ferromagnetic oxide Li-doped Ni$_{1-x}$Fe$_x$O with hole doping (2007)

Kobayashi, M., Hwang, J. I., Song, G. S., Ooki, Y., Takizawa, M., Fujimori, A., ...

The electronic structure of Li-doped Ni$_{1-x}$Fe$_x$O has been investigated using photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). The Ni $2p$ core-level PES and XAS spectra...

First Beam Tests Of The Ins Split Coaxial Rfq For Radioactive Nuclei (2007)

Arai Imanishi Niki, S. Arai, A. Imanishi, K. Niki, M. Okada, Y. Takeda, ...

A 25.5-MHz split coaxial RFQ has come into operation at INS. This linac was designed so as to accelerate ions with a charge-tomass ratio greater than 1/30 from 2 to 172 keV/u. The maximum intervane...

Initial Emittance Measurements for Polarized Electron Gun with NEA-GaAs Type Photocathode (2007)

Yamamoto, Naoto, Yamamoto, M., Sakai, R., Nakanishi, T., Okumi, S., Kuwahara, M., ...

Extremely low emittance electron beams are necesarry for new generation accelerators. The value of the required emittances is as low as 0.1 π.mm.mrad. NEA-type photocathodes have an intrinsic...

Production of High Density Polarized Electron Beam from GaAs-GaAsP Superlattice Photocathode (2007)

Yamamoto, M., Yamamoto, N., Okumi, S., Sakai, R., Kuwahara, M., Morino, T., ...

Future high energy accelerators require polarized electron sources that can generate high bunch charge and/or high density electron beam with low emittance. Various superlattice photocathodes and a...

Magnetotransport and Antiferromagnetic Behavior in ErP Epitaxial Layers on GaInP(001) (2007)

Nakamura, A., Ito, T., Ohnishi, H., Koizumi, A., Takeda, Y.

We have investigated transport and magnetic properties in ErP ultrathin films grown on the GaInP (001) surface. Hall resistance and transverse magnetoresistance measurements yield the carrier density...

NB-3/Notch1 pathway via Deltex1 promotes neural progenitor cell differentiation into oligodendrocytes (2004)

Cui, X. Y., Hu, Q. D., Tekaya, M., Shimoda, Y., Ang, B. T., Nie, D. Y., ...

Neurons and glia in the vertebrate central nervous system arise in temporally distinct, albeit overlapping, phases. Neurons are generated first followed by astrocytes and oligodendrocytes from common...

F3/contactin acts as a functional ligand for notch during oligodendrocyte maturation (2003)

Hu, Q. D., Ang, B. T., Karsak, M., Hu, W. P., Cui, X. Y., Duka, T., ...

Axon-derived molecules are temporally and spatially required as positive or negative signals to coordinate oligodendrocyte differentiation. Increasing evidence suggests that, in addition to the...

Fluorescence x-ray absorption fine structure study on local structures around Fe atoms heavily doped in GaN by low-temperature molecular-beam epitaxy (2001)

Ofuchi, H, Oshima, M, Tabuchi, M, Takeda, Y, Akinaga, H, Nemeth, S, ...

A local structural transition in heavily Fe-doped GaN films related to the magnetic properties has been revealed by fluorescence x-ray absorption fine structure (XAFS) analysis. The structural...

Iodometric method of the determination of the exposed damage surface of cereal grain (1995)

A. Miś, S. Grundas, Y. Takeda, S. Hizukuri

In this paper, a method for determining the area of the exposed damage surface of grain endosperm by means of the amperometric measurement of iodine adsorption has been presented. According to the...

Contrasted Effects of CO2 on the Regulation of Dormancy and Germination in Xanthium pennsylvanicum and Setaria faberi Seeds (1995)

Yoshioka, T., Ota, H., Segawa, K., Takeda, Y., Esashi, Y.

The effects of CO2 on dormancy and germination were examined using seeds of cocklebur (Xanthium pennsylvanicum Wallr.) and giant foxtail (Setaria faberi Herrm.). The rate of germination of the giant...

Some determinants of morphology and release rate from poly()lactic acid microspheres (1990)

Kishida, A., Dressman, Jennifer B., Yoshioka, S., Aso, Y., Takeda, Y.

Morphology and release rate from poly()lactic acid microspheres were studied as a function of drug loading, drug lipophilicity and solvent evaporation rate. Sudan III was used to exemplify lipophilic...

LOCAL STRUCTURE IN InGaAsP QUATERNARY ALLOYS (1986)

Oyanagi, H., Takeda, Y., Matsushita, T., Ishiguro, T., Sasaki, A.

The local structure of InGaAsP quaternary alloys epitaxially grown on InP substrates has been studied by EXAFS and near-edge structure. The bimodal distribution of bondlength at both cation (In, Ga)...

ULTRASONIC STUDY OF SINTERED SiC AT LOW TEMPERATURES (1986)

Hikata, A., Elbaum, C., Inomata, Y., Orange, G., Takeda, Y.

We investigated the temperature dependence, at low temperatures (< 1 K), of sound velocity in sintered silicon carbide samples, containing three different sintering additives, boron or beryllium...

LOCAL STRUCTURE IN InGaAsP QUATERNARY ALLOYS (1986)

Oyanagi, H., Takeda, Y., Matsushita, T., Ishiguro, T., Sasaki, A.

The local structure of InGaAsP quaternary alloys epitaxially grown on InP substrates has been studied by EXAFS and near-edge structure. The bimodal distribution of bondlength at both cation (In, Ga)...

ULTRASONIC STUDY OF SINTERED SiC AT LOW TEMPERATURES (1986)

Hikata, A., Elbaum, C., Inomata, Y., Orange, G., Takeda, Y.

We investigated the temperature dependence, at low temperatures (< 1 K), of sound velocity in sintered silicon carbide samples, containing three different sintering additives, boron or beryllium...

ULTRASONIC STUDY OF TWO-LEVEL TUNNELING SYSTEMS IN SINTERED SiC (1985)

Hikata, A., Elbaum, C ., Inomata, Y., Orange, G., Takeda, Y.

We investigated the temperature dependence, at low temperatures. (< 1K), of sound velocity in sintered silicon carbide samples, containing three different sintering additives, boron or beryllium...

ULTRASONIC STUDY OF TWO-LEVEL TUNNELING SYSTEMS IN SINTERED SiC (1985)

Hikata, A., Elbaum, C ., Inomata, Y., Orange, G., Takeda, Y.

We investigated the temperature dependence, at low temperatures. (< 1K), of sound velocity in sintered silicon carbide samples, containing three different sintering additives, boron or beryllium...

LOW-TEMPERATURE GROWTH CONDITIONS AND PROPERTIES OF AlGa (As) Sb ON GaSb SUBSTRATE BY LPE (1982)

Fujita, S., Hamaguchi, N., Takeda, Y., Sasaki, A.

Liquid-phase epitaxial growth of AlGaSb and AlGaAsSb alloy semiconductors on GaSb substrates has been investigated as a function of growth temperature (TG). At a growth temperature lower than 450°C,...

LOW-TEMPERATURE GROWTH CONDITIONS AND PROPERTIES OF AlGa (As) Sb ON GaSb SUBSTRATE BY LPE (1982)

Fujita, S., Hamaguchi, N., Takeda, Y., Sasaki, A.

Liquid-phase epitaxial growth of AlGaSb and AlGaAsSb alloy semiconductors on GaSb substrates has been investigated as a function of growth temperature (TG). At a growth temperature lower than 450°C,...

The chromosomal origin of replication (oriC) of Erwinia carotovora (1982)

Takeda, Y., Harding, N.E., Smith, D.W., Zyskind, J.W.

The chromosomal DNA replication origin (oriC) of the plant pathogen Erwinia carotovora has been isolated and sequenced. The minimal E. carotovora oric region functional in Escherichia coli is a 374...

CHARGE DISPROPORTIONATION IN Fe4+-OXIDES WITH PEROVSKITE-TYPE STRUCTURES (1979)

Takano, M., Nakanishi, N., Takeda, Y., Naka, S.

For a further examination and elaboration of our simple charge disproportionation model for Fe4+-oxides, 2Fe4+ → Fe3+ + Fe5+, two series of solid solutions Ca1-xSrxFeO3 and Sr1-xLaxFeO3 with...

PREPARATION AND CHARACTERIZATION OF CaFeO3 AND ITS SOLID SOLUTION WITH SrFeO3 (1979)

Takeda, Y., Naka, S., Takano, M.

A Mössbauer effect study on the Ca1-xSrxFeO3 (0 ≤ x ≤ 0.75) system shows a charge disproportionation 2Fe4+ → "Fe3+" + "Fe5+" below the antiferromagnetic transition temperatures. At...

SUPERTRANSFERRED HYPERFINE FIELD AT Sn4+ IN (Ca1-x Srx) MnO3 AND (Ca1-x Srx)2MnO4 (1974)

Takano, M., Takeda, Y., Shimada, M., Matsuzawa, T.

We prepared (Ca1-xSrx)Mn0.99119Sn0.01O3 with the cubic perovskite structure and (Ca1-xSrx)2Mn0.99119Sn0.01O4 with the tetragonal K2NiF4 type structure (0 ⩽ x ⩽ 1 in both cases) and...

Vibrio cholerae O139 in Calcutta, 1992-1998: incidence, antibiograms, and genotypes.

Basu, A., Garg, P., Datta, S., Chakraborty, S., Bhattacharya, T., Khan, A., ...

We report results of surveillance for cholera caused by Vibrio cholerae O139 from September 1992, when it was first identified, to December 1998. V. cholerae O139 dominated as the causative agent of...

Molecular evidence of clonal Vibrio parahaemolyticus pandemic strains.

Chowdhury, N. R., Chakraborty, S., Ramamurthy, T., Nishibuchi, M., Yamasaki, S., Takeda, Y., ...

The upsurge in worldwide incidence of Vibrio parahaemolyticus infection in the last 5 years has been attributed to the recent appearance of three serotypes with pandemic potential: O3:K6, O4:K68, and...

A phase I/II trial of irinotecan–cisplatin combined with an anti-late-diarrhoeal programme to evaluate the safety and antitumour response of this combination therapy in patients with advanced non-small-cell lung cancer

Takeda, Y, Tsuduki, E, Izumi, S, Hojo, M, Kamimura, M, Naka, G, ...

We conducted a phase I/II study in patients with advanced non-small-cell lung cancer (NSCLC) to increase the therapeutic index of the cisplatin–irinotecan combination by institution of an...