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Sako, Hiroyuki; Harada, Hiroyuki; Sakaguchi, Takao*; Chujo, Tatsuya*; Esumi, Shinichi*; Gunji, Taku*; Hasegawa, Shoichi; Hwang, S.; Ichikawa, Yudai; Imai, Kenichi; et al.
Nuclear Physics A, 956, p.850 - 853, 2016/12
Times Cited Count：12 Percentile：65.66(Physics, Nuclear)
collisions at 
= 200 and 62.4 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Armendariz, R.*; et al.
Physical Review C, 83(6), p.064903_1 - 064903_29, 2011/06
Times Cited Count：184 Percentile：99.44(Physics, Nuclear)Transverse momentum distributions and yields for 
, and 
in collisions at = 200 and 62.4 GeV at midrapidity are measured by the PHENIX experiment at the RHIC. We present the inverse slope parameter, mean transverse momentum, and yield per unit rapidity at each energy, and compare them to other measurements at different collisions. We also present the scaling properties such as 
and 
scaling and discuss the mechanism of the particle production in collisions. The measured spectra are compared to next-to-leading order perturbative QCD calculations.
and Au+Au collisions at 
= 200 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Aramaki, Y.*; et al.
Physical Review C, 83(4), p.044912_1 - 044912_16, 2011/04
Times Cited Count：8 Percentile：49.7(Physics, Nuclear)Measurements of electrons from the decay of open-heavy-flavor mesons have shown that the yields are suppressed in Au+Au collisions compared to expectations from binary-scaled collisions. Here we extend these studies to two particle correlations where one particle is an electron from the decay of a heavy flavor meson and the other is a charged hadron from either the decay of the heavy meson or from jet fragmentation. These measurements provide more detailed information about the interaction between heavy quarks and the quark-gluon matter. We find the away-side-jet shape and yield to be modified in Au+Au collisions compared to collisions.
Miyo, Yasuhiko; Hiratsuka, Hajime; Masui, Hiroshi*; Hosogane, Nobuyuki; Miya, Naoyuki
JAERI-Tech 2001-070, 33 Pages, 2001/11
JAERI-Tech-2001-070.pdf:3.02MB
In order to improve the gas injection valve used for the operation of JT-60, a new type of valve (multilayer piezoelectric actuator valve) was developed .The conventional valve (bimorph piezoelectric actuator valve) has been used for 15 years from the beginning of experimental operation in April, 1985. Consequently, it came to be hard to keep the performance of the valve as a gas injector because its driving source, piezoelectric element, has deteriorated by long time use.In the design, it is required:(1) to be hard structure for sheet leak,(2) to allow a repair work at atmosphere side without an air vent of the vacuumvessel,(3) to be more smaller and lighter compaired with the conventional one,(4) to have a high maintenance efficiency. The new valve developed was examined with various tests such as gas flow characteristic test, high magnetic field proof test, high temperature proof test and gas flow rate test for aged deterioration. As a result, the valve with desired performance for JT-60 could be obtained.
Masui, Tomomi; Fujiwara, Satoru; Nakagawa, Hiroshi; Kataoka, Mikio
no journal, ,
Keeping cells in aqueous environment is essential for organisms to be alive. Desiccation damages the cells severely, and causes death of most organisms. Some organisms, however, known to survive under such arid conditions. This desiccation tolerance has been known to be related to the production of sugars in these organisms. In this study, we investigate the effect of trehalose on the structure and dynamics of lipid membranes in the solution condition by employing small and wide angle X-ray scattering and neutron spin echo technique. These experimental data represent the trehalose disorder the lamellar structure and decrease the bending rigidity of membrane.
Masui, Tomomi; Fujiwara, Satoru; Nakagawa, Hiroshi; Kataoka, Mikio
no journal, ,
It is known that trehalose is a protective reagent and plays important roles in desiccation tolerance. One of the important properties of trehalose for the desiccation tolerance is stabilization of the biomembranes in the fluid phase. However, due to lack of information of how the trehalose molecules distribute on the biomembrane and interact with lipid molecules, the preservation mechanism of the biomembrane by trehalose has not been elucidated. Here we aimed at determining the distribution of trehalose on the simple model biomembrane and characterize dynamic properties of the membrane and the lipid molecules. For this purpose we employed small- and wide-angle X-ray scattering (SAXS and WAXS) and neutron spin echo (NSE) techniques. The NSE measurement revealed that the addition of trehalose to lipid membrane decreases the bending rigidity. This effect of trehalose is same tendency of temperature.
Ogura, Hiroshi; Masui, Kenji; Watanabe, Nobuhisa; Kuno, Takehiko; Yamada, Keiji
no journal, ,
no abstracts in English
Masui, Tomomi; Fujiwara, Satoru; Endo, Hitoshi; Nakagawa, Hiroshi; Kataoka, Mikio
no journal, ,
Water is essential for organisms and desiccation damages the cells severely, and causes death of most organisms. Some organisms, however, known to survive under such arid conditions. This desiccation tolerance has been known to be related to the production of sugars in these organisms. One property which is important for the desiccation tolerance is stabilization of the cell membranes in the fluid phase by limiting the dehydration-induced increase in the gel-fluid transition temperature of the membranes. The membranes not only act as a barrier within or around a cell, but also control transfer of substances across the membranes. Elucidating how sugars interact with the membranes is therefore important for understanding the molecular mechanism of the desiccation tolerance. We investigated the effects of the sugars on the structures and the dynamics of the lipid membranes by small- and wide-angle X-ray scattering (SAXS and WAXS), and neutron spin-echo (NSE), techniques.
