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Suzuki, T.,Bhang, H.,Franklin, G.,Gomikawa, K.,Hayano, R.S.,Hayashi, T.,Ishikawa, K.,Ishimoto, S.,Itahashi, K.,Iwasaki, M.,Katayama, T.,Kondo, Y.,Matsuda, Y.,Nakamura, T.,Okada, S.,Outa, H.,Quinn, B. Elsevier 2004 Physics letters: B Vol.597 No.3
<P><B>Abstract</B></P><P>We have measured the proton energy distribution from the <SUP>4</SUP>He(stopped <SUP>K−</SUP>,p) reaction by means of time-of-flight. A mono-energetic peak was observed, which is interpreted as the formation of a new kind of neutral tribaryon S<SUP>0</SUP>(3115) with isospin T=1 and strangeness S=−1. The mass and width of the state were deduced to be 3117.0−4.4+1.5MeV/<SUP>c2</SUP> and <21MeV/<SUP>c2</SUP>, respectively. The state mainly decays into ΣNN.</P>
Preparation and Properties of Inverse Perovskite Mn3GaN Thin Films and Heterostructures
H. Tashiro,R. Suzuki,T. Miyawaki,K. Ueda,H. Asano 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
Thin films and heterostructures of Mn3GaN with an inverse perovskite structure were grownepitaxially on SrTiO3 (001) and (La0.18Sr0.82)(Al0.59Ta0.41)O3 (001) (LSAT) substrates by ionbeam sputtering, and their structural and electrical properties have been investigated. Mn3GaNepitaxial thin films showed metallic behavior of temperature-dependent resistivity with a smallmaximum at 290-340 K. The maximum resistivity could be attributed to the magnetic transitionfrom antiferromagnetism to paramagnetism. It has been found that epitaxial heterostructuresformed by ferroelectric Ba0.7Sr0.3TiO3 and Mn3GaN layers exhibit a large magnetocapacitanceeffect of more than 2000% in an applied magnetic filed of 1.5 T.
Suzuki, T.,Kaneda, H.,Onaka, T. The Korean Astronomical Society 2012 天文學論叢 Vol.27 No.4
Nearby spiral galaxies M101 and M81 are considered to have undergone a galaxy-galaxy interaction. M101 has experienced HI gas infall due to the interaction. With AKARI far-infrared (IR) photometric observations, we found regions with enhanced star forming activity, which are spatially close to regions affected by the interaction. In addition, the relation between the star formation rate (SFR) and the gas content for such regions shows a significant difference from typical spiral arm regions. We discuss possible explanations for star formation processes on a kiloparsec scale and the association with interaction-triggered star formation. We also observed the compact group of galaxies Stephan's Quintet (SQ) with the AKARI Far-infrared Surveyor (FIS). The SQ shows diffuse intergalactic medium (IGM) due to multiple collisions between the member galaxies and the IGM. The intruder galaxy NGC 7318b is currently colliding with the IGM and causes a large-scale shock. The 160 micron image clearly shows the structure along the shock ridge as seen in warm molecular hydrogen line emission and X-ray emission. The far-IR emission from the shocked region comes from the luminous [CII]$158{\mu}m$ line and cold dust (~ 20 K) that coexist with molecular hydrogen gas. Survival of dust grains is indispensable to form molecular hydrogen gas within the collision age (~ 5 Myr). At the stage of the dusty IGM environment, [CII] and $H_2$ lines rather than X-ray emission are powerful cooling channels to release the collision energy.
Electrodeposited Fe-Co Films Prepared from a Citric-acid-based Plating Bath
T. Yanai,H. Uto,T. Shimokawa,M. Nakano,H. Fukunaga,K. Suzuki 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
Electrodeposited Fe-Co films are commonly prepared in a boric-acid-based bath. In this research,we applied citric acid instead of boric acid for the plating of Fe-Co films because boron in the wastebath is restricted by environmental-protection regulations in Japan. We evaluated the effect ofcitric acid on the magnetic and structural properties of the films. The saturation magnetization ofthe Fe-Co films slightly increased while the Fe content in the Fe-Co films decreased with increasingcitric acid concentration. The lowest coercivity value of 240 A/m was obtained at a citric acidconcentration of 100 g/L. The plating bath with this citric acid concentration enabled us to obtainFe-Co films with high saturation magnetizations and smooth surface morphologies.
An alternative spliced mouse presenilin-2 mRNA encodes a novel γ-secretase inhibitor
Suzuki, Y.,Ohta, K.,Itoh, M.,Sakoh-Sumitomo, Y.,Mitsuda, T.,Ueda, M.,Hayakawa-Yano, Y.,Li, S.,Hida, Y.,Inuzuka, T.,Jung, Y.K.,Nakagawa, T. North-Holland Pub ; Elsevier Science Ltd 2009 FEBS letters Vol.583 No.9
The γ-secretase, composed of presenilin-1 (PS1) or presenilin-2 (PS2), nicastrin (NCT), anterior pharynx-defective phenotype 1 (APH-1), and PEN-2, is critical for the development of Alzheimer's disease (AD). PSs are autoproteolytically cleaved, producing an N-terminal fragment (NTF) and a hydrophilic loop domain-containing C-terminal fragment. However, the role of the loop domain in the γ-secretase complex assembly remains unknown. Here, we report a novel PS2 isoform generated by alternative splicing, named PS2β, which is composed of an NTF with a hydrophilic loop domain. PS2β disturbed the interaction between NCT and APH-1, resulting in the inhibition of amyloid-β production. We concluded that PS2β may inhibit γ-secretase activity by affecting the γ-secretase complex assembly. Structured summary: MINT-7025654: APH1 (uniprotkb:Q96BI3) physically interacts (MI:0218) with PEN2 (uniprotkb:Q9NZ42), PS2 beta (uniprotkb:Q61144-2) and PS1 (uniprotkb:P49769) by anti tag coimmunoprecipitation (MI:0007) MINT-7025631: APH1 (uniprotkb:Q96BI3) physically interacts (MI:0218) with NCT (uniprotkb:Q92542), PEN2 (uniprotkb:Q9NZ42) and PS1 (uniprotkb:P49769) by anti tag coimmunoprecipitation (MI:0007)
STM investigation of porphyrin isomers on metal substrates
T. Terui,T. Kamikado,Y. Okuno,H. Suzuki,S. Mashiko 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
We performed scanning tunneling microscopy (STM) experiments on mono- or sub-monolayer deposited porphyrin moleculeson metal substrates. We observed substitution-dependent structure changes of the molecules. Obtaining STM images of thestructure and arrangement of functional molecules would contribute valuable information towards creation of nano-molecular-devices. scanning probe microscopy (SPM) shows the greatest potential for reaching this goal, at present. STM is able to obtainimages with nano-meter resolution of molecules on metal surfaces. These high-resolution images reveal the molecular structure andarrangement of the molecules on the surface and contain information about the moleculesubstrate interaction and the moleculemolecule interaction. STM will be useful for the assembly of nano-devices made from molecules on a substrate.
Production of Chimera by Embryos Aggregation Techniques in Bovine - Review-
Suzuki, T. Asian Australasian Association of Animal Productio 2001 Animal Bioscience Vol.14 No.8
A tetraparental chimeric bull was successfully produced by aggregating bovine IVF embryos of F1 (female Holstein${\times}$male Japanese Black) and F1(female Japanese Brown${\times}$male Limousin) and culturing in vitro without the zona pellucida at Yamaguchi Research Station in Japan. In the microsatellite genotyping, 12% (28/228) microsatellite primer sets ware potentially useful for this parentage analysis in the chimeric bull, 78.6% (22/28) of microsatellite present in the chimeric bull were uniquely contributed from the Japanese Black and 21.4% (6/28) from Limousin. This chimeric bull semen was used in producing IVF embryos. The chromosome preparations were made from peripheral lymphocytes. Based on chromosome analysis the Chimera had apparently normal chromosomes (29 acrocentric pairs, one large sub metacentric X chromosome and one small sub metacentric Y chromosome). The proportion of acrosome reacted spermatozoa after 1 h of incubation was higher (p<0.01) with the Chimera than with the Holstein and in Japanese Brown bulls. But did not differ from Japanese Black and Limousin bull sperm. Fertilization rates observed after 5 h of sperm-oocyte incubation with Chimera sperm were higher (p<0.05) than with Japanese Brown and (p<0.01) than with Holstein sperm, but did not differ from Japanese Black and Limousin sperm. The cleavage rates of IVF oocytes inseminated with Chimera sperm were also higher (p<0.001) compared with Holstein, (p<0.01) Japanese Brown and (p<0.05) Limousin, but did not differ from Japanese Black sperm. The blastocyst rates of IVM oocytes inseminated with sperm were higher (p<0.05) than in Limousin, Japanese Brown and Holstein, but did not differ from Japanese Black. Chimeric cattles were produced by aggregation of parthenogenetic (Japanese Brown) and in vitro fertilized (Holstein) bovine embryos at the Yamaguchi Research Station in Japan and by aggregation of parthenogenetic (Red Angus) and in vitro fertilized (Holstein) embryos at the St. Gabriel Research Station in Louisiana. The aggregation rate of the reconstructed demi-embryos cultured in vitro without agar embedding was significantly lower than with agar embedding. The aggregation was also lower when the aggregation resulted from a whole parthenogenetic and IVF-derieved embryos cultured without agar than when cultured with agar. The development rate to blastocysts, however, was not different among the treatment. To verify parthenogenetic and the cells derieved from the male IVF embryos in blastocyst formation, 51 embryos were karyotyped, resulting in 27 embryos having both XX and XY chromosome plates in the same sample, 14 embryos with XY and 10 embryos with XX. The viability and the percentage of zonafree chimeric embryos at 24 h following cryopreservation in EG plus T with 10% PVP were significantly greater than those cryopreserved without PVP. Pregnancies were diagnosed in both stations after the transfer of chimeric blastocysts. Twin male and single chimeric calves were delivered at the Yamaguchi station, with each having both XX and XY chromosomes detected. Three pregnancies resulted from the transfer of 40 chimeric embryos at the Louisiana station. Two pregnancies were Jost prior to 4 months and one phenotypically chimeric viable male born.