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SYNTHESIS AND MICROSTRUCTURE OF A NOVEL TiO2 AEROGEL–TiO2
YOSHIKAZU SUZUKI,MARIE-HÉLÈNE BERGER,DANIELA D'ELIA,PIERRE ILBIZIAN,CHRISTIAN BEAUGER,ARNAUD RIGACCI,JEAN-FRANÇOIS HOCHEPIED,PATRICK ACHARD 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2008 NANO Vol.3 No.5
TiO2 aerogel–10 mol% TiO2 nanowire composite was prepared by a sol–gel technique with the addition of TiO2 nanowires to TiO2 sol, followed by supercritical drying in CO2. TiO2 nanowires (anatase with minor rutile phases) as dispersoid were prepared by a hydrothermal process followed by calcination in air at 600°C. The TiO2 nanowires were dispersed in a 2-propanol/H2O/HNO3 solution, and the mixture was added drop by drop to a tetrabutyl orthotitanate [i.e. Ti (IV) n-butoxide] solution in 2-propanol. After gelation, the TiO2 alcogel–TiO2 nanowire composite was dried in supercritical CO2 to obtain the final, TiO2 aerogel–TiO2 nanowire composite. TEM analysis revealed that a unique "nanowire network" structure was formed withinthe mesoporous aerogel matrix. The aerogel–TiO2 nanowire composite had a relatively large surface area 427 m2/g, with mesopores ~ 16 nm in diameter and a pore of volume of 1.63 cm3/g.
Plasma-Confinement Physics Study in Compact Helical System
stoichi Okamura,A. Fujisawa,A. Shimizu,C. Takahashi,C. Suzuki,H. Iguchi,H. Nakano,H. Matsushita,K. Nagaoka,K. Matsuo,K. Ida,K. Toi,K. Nakamura,K. Matsuoka,M. Yoshinuma,M. Isobe,M. Takeuchi,R. Ikeda,S. 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
In a CHS experiment, various types of transport barrier have been studied. An internal transport barrier (ITB) for electrons in a stellarator was first found in CHS, and the ITB for improved ion confinement was also found. H-mode (edge transport barrier) study in CHS showed many common features in transition to tokamak experiments, although the magnetic surface quantities are very different. Discharges with a combination of ETB and ITB were also found. Two heavy ion beam diagnostics in CHS showed a new direct measurement of zonal flow structure in toroidal confinement. The relation between the fluctuation and the transport barrier was also studied.
Forebrain-specific ablation of phospholipase Cγ1 causes manic-like behavior
Yang, Y R,Jung, J H,Kim, S-J,Hamada, K,Suzuki, A,Kim, H J,Lee, J H,Kwon, O-B,Lee, Y K,Kim, J,Kim, E-K,Jang, H-J,Kang, D-S,Choi, J-S,Lee, C J,Marshall, J,Koh, H-Y,Kim, C-J,Seok, H,Kim, S H,Choi, J H,Ch Macmillan Publishers Limited, part of Springer Nat 2017 Molecular psychiatry Vol.22 No.10
<P>Manic episodes are one of the major diagnostic symptoms in a spectrum of neuropsychiatric disorders that include schizophrenia, obsessive-compulsive disorder and bipolar disorder (BD). Despite a possible association between BD and the gene encoding phospholipase C gamma 1 (PLCG1), its etiological basis remains unclear. Here, we report that mice lacking phospholipase C gamma 1 (PLC gamma 1) in the forebrain (Plcg1(f/f); CaMKII) exhibit hyperactivity, decreased anxiety-like behavior, reduced depressive-related behavior, hyperhedonia, hyperphagia, impaired learning and memory and exaggerated startle responses. Inhibitory transmission in hippocampal pyramidal neurons and striatal dopamine receptor D1-expressing neurons of Plcg1-deficient mice was significantly reduced. The decrease in inhibitory transmission is likely due to a reduced number of gamma-aminobutyric acid (GABA)-ergic boutons, which may result from impaired localization and/or stabilization of postsynaptic CaMKII (Ca2+/calmodulin-dependent protein kinase II) at inhibitory synapses. Moreover, mutant mice display impaired brain-derived neurotrophic factor-tropomyosin receptor kinase B-dependent synaptic plasticity in the hippocampus, which could account for deficits of spatial memory. Lithium and valproate, the drugs presently used to treat mania associated with BD, rescued the hyperactive phenotypes of Plcg1(f/f); CaMKII mice. These findings provide evidence that PLC gamma 1 is critical for synaptic function and plasticity and that the loss of PLC gamma 1 from the forebrain results in manic-like behavior.</P>
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, Y.,Hong, Y.H.,Song, S.H.,Ardiyanti, A.,Kato, D.,So, K.H.,Katoh, K.,Roh, Sang-Gun Asian Australasian Association of Animal Productio 2012 Animal Bioscience Vol.25 No.9
Adipokines, adipocyte-derived protein, have important roles in various kinds of physiology including energy homeostasis. Chemerin, one of adipocyte-derived adipokines, is highly expressed in differentiated adipocytes and is known to induce macrophage chemotaxis and glucose intolerance. The objective of the present study was to investigate the changes of chemerin and the chemokine-like-receptor 1 (CMKLR1) gene expression levels during differentiation of the bovine adipocyte and in differentiated adipocytes treated with tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$), adiponectin, leptin, and chemerin (peptide analog). The expression levels of the chemerin gene increased at d 6 and 12 of the differentiation period accompanied by increased cytoplasm lipid droplets. From d 6 onward, peroxisome proliferator-activated receptor-${\gamma}2$ (PPAR-${\gamma}2$) gene expression levels were significantly higher than that of d 0 and 3. In contrast, CMKLR1 expression levels decreased at the end of the differentiation period. In fully differentiated adipocytes (i.e. at d 12), the treatment of TNF-${\alpha}$ and adiponectin upregulated both chemerin and CMKLR1 gene expression levels, although leptin did not show such effects. Moreover, chemerin analog treatment was shown to upregulate chemerin gene expression levels regardless of doses. These results suggest that the expression of chemerin in bovine adipocyte might be regulated by chemerin itself and other adipokines, which indicates its possible role in modulating the adipokine secretions in adipose tissues.
h Ninomiya,T. Imai,T. Fujii,T. Suzuki,T. Fujita,T. Yamamoto,Y. Uesugi,Y. Kamada,Y. Takase,Y. Kudo,Y. Miura,Y. Ikeda,Y. M. Miura,A. Shimizu,A. Kimura,A. Morioka,A. Nishimura,A. Sagara,G. Kurita,H. Kubo 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The NCT Program, in which the present JT-60U is being modified into a superconducting coil machine, is discussed under nationwide collaboration in Japan. Its mission is to establish high-beta steady-state operation for DEMO and to contribute to ITER. NCT is designed to have potential to investigate such research.