Zobrazeno 1 - 10
of 472
pro vyhledávání: '"Yasuo Ohishi"'
Autor:
Koutaro Hikosaka, Shoh Tagawa, Kei Hirose, Yoshiyuki Okuda, Kenta Oka, Koichiro Umemoto, Yasuo Ohishi
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-8 (2022)
Abstract Hydrogen could be an important light element in planetary cores, but its effect on phase diagrams of iron alloys is not well known because the solubility of H in Fe is minimal at ambient pressure and high-pressure experiments on H-bearing sy
Externí odkaz:
https://doaj.org/article/c2b6301c6a2d4c76bfe6e436a44ae7a0
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-8 (2022)
Yokoo et al. find the liquid immiscibility between H-rich and S-rich liquids Fe above 20 GPa. The separation of immiscible liquids could explain the disappearance of Mars’ magnetic field and the formation of low-velocity layer atop the Earth’s co
Externí odkaz:
https://doaj.org/article/6be7cf07ec0a4c0097380fa12317d705
Autor:
Yoshiyuki Okuda, Kenji Ohta, Yu Nishihara, Naohisa Hirao, Tatsuya Wakamatsu, Sho Suehiro, Saori I. Kawaguchi, Yasuo Ohishi
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
Abstract The crystallization of the magma ocean resulted in the present layered structure of the Earth’s mantle. An open question is the electronic spin state of iron in bridgmanite (the most abundant mineral on Earth) crystallized from a deep magm
Externí odkaz:
https://doaj.org/article/1d76b3cf74684463acadd4c642c783fe
Publikováno v:
Geophysical Research Letters, Vol 49, Iss 17, Pp n/a-n/a (2022)
Abstract We examined liquidus phase relations in Fe‐O ± H at ∼40 and ∼150 GPa, and in Fe‐H at 45 GPa. While it has been speculated that Fe and FeH form continuous solid solution to core pressures, our experiment on Fe‐H showed that FeH0.20
Externí odkaz:
https://doaj.org/article/a6352e2ec7d0448b972f340e1753667c
Autor:
Shoh Tagawa, Naoya Sakamoto, Kei Hirose, Shunpei Yokoo, John Hernlund, Yasuo Ohishi, Hisayoshi Yurimoto
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
Based on diamond-anvil cell experiments and cutting-edge secondary ion mass spectrometry analyses, the authors here show that hydrogen may be an important constituent in the Earth’s core and also in the metallic cores of any terrestrial planet or m
Externí odkaz:
https://doaj.org/article/89aca266c3354275baa6a5d3811e70e6
Publikováno v:
Matter and Radiation at Extremes, Vol 7, Iss 3, Pp 038403-038403-8 (2022)
Synchrotron radiation x-ray diffraction investigations of iron (Fe) and nickel (Ni) are conducted at pressures up to 354 and 368 GPa, respectively, and the equations of state (EOSs) at 298 K for the two elements are obtained for data extending to pre
Externí odkaz:
https://doaj.org/article/e24c33fdb96d430eafd6c9dede487f61
Autor:
Liang Ma, Mi Zhou, Yingying Wang, Saori Kawaguchi, Yasuo Ohishi, Feng Peng, Hanyu Liu, Guangtao Liu, Hongbo Wang, Yanming Ma
Publikováno v:
Physical Review Research, Vol 3, Iss 4, p 043107 (2021)
The recent discovery of a class of sodalitelike clathrate superhydrides (e.g., YH_{6}, YH_{9}, ThH_{9}, ThH_{10}, and LaH_{10}) at extreme pressures, which commonly exhibit high-temperature superconductivity with the highest T_{c} approaching 260 K f
Externí odkaz:
https://doaj.org/article/df4d94da008c4e99889fddc0b2b411df
Autor:
Kenji Ohta, Yu Nishihara, Yuki Sato, Kei Hirose, Takashi Yagi, Saori I. Kawaguchi, Naohisa Hirao, Yasuo Ohishi
Publikováno v:
Frontiers in Earth Science, Vol 6 (2018)
The Earth's core mainly consists of iron, and its thermal transport properties are of vital importance for our understanding of the thermal evolution and the dynamics of the core and the mantle. However, the reported values of thermal conductivity of
Externí odkaz:
https://doaj.org/article/3f2a1b8cbacb4b89a41380c64763f0d6
Publikováno v:
AIP Advances, Vol 8, Iss 1, Pp 015310-015310-5 (2018)
Using synchrotron radiation x-ray diffraction techniques, the equation of state of monoclinic ZrO2 has been investigated under a hydrostatic pressure condition at 298 K. Monoclinic ZrO2 transformed to the orthorhombic I phase at between 5.7 and 7.0 G
Externí odkaz:
https://doaj.org/article/80051006f4204f38b60ed48fabe60499
Autor:
Hirotada Kittaka, Hiroshi Akimoto, Hitoshi Takeshita, Hiroyuki Funaoka, Hiroshi Hazui, Masao Okamoto, Hitoshi Kobata, Yasuo Ohishi
Publikováno v:
PLoS ONE, Vol 9, Iss 6, p e99915 (2014)
BACKGROUND: The level of intestinal fatty acid-binding protein (I-FABP) is considered to be useful diagnostic markers of small bowel ischemia. The purpose of this retrospective study was to investigate whether the serum I-FABP level is a predictive m
Externí odkaz:
https://doaj.org/article/21d0bee5983e441280f5b6c25cc0f947