Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Ryoichi Nakada"'
Autor:
Mizuho Koike, Ryoichi Nakada, Iori Kajitani, Tomohiro Usui, Yusuke Tamenori, Haruna Sugahara, Atsuko Kobayashi
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-7 (2020)
Mars has long been thought to contain organic compounds, but the origins and plausibility are debated. Here the authors employ a new technique to assess organic nitrogen compounds in a Martian meteorite, concluding that these compounds are indeed lik
Externí odkaz:
https://doaj.org/article/775ca1d050654c72ad3c7daacdc53a6b
Autor:
Go-Ichiro Uramoto, Yuki Morono, Naotaka Tomioka, Shigeyuki Wakaki, Ryoichi Nakada, Rota Wagai, Kentaro Uesugi, Akihisa Takeuchi, Masato Hoshino, Yoshio Suzuki, Fumito Shiraishi, Satoshi Mitsunobu, Hiroki Suga, Yasuo Takeichi, Yoshio Takahashi, Fumio Inagaki
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-10 (2019)
Ferromanganese minerals are abundant in marine environments but the extent of these minerals in subseafloor sediments remains unknown. Here the authors find abundant ferromanganese microparticles in oxic pelagic clays, accounting for 14–16% of the
Externí odkaz:
https://doaj.org/article/2cdd5f8e34424f969e7b82419f23116c
Publikováno v:
Minerals, Vol 11, Iss 2, p 176 (2021)
The aqueous environment of ancient Mars is of significant interest because of evidence suggesting the presence of a large body of liquid water on the surface at ~4 Ga, which differs significantly from the modern dry and oxic Martian environment. In t
Externí odkaz:
https://doaj.org/article/74efaba67d194c0f9d71ac120601ee62
Publikováno v:
Nature Geoscience. 16:461-465
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::729f463bda46a433d07beb06367ce388
https://doi.org/10.1038/s41561-023-01169-4
https://doi.org/10.1038/s41561-023-01169-4
Autor:
Minato Tobita, Ryoichi Nakada, Tomohiro Usui, Tetsuya Yokoyama, Yoshio Takahashi, Kenji Shimizu, M. Shidare
Publikováno v:
Geochimica et Cosmochimica Acta. 313:85-98
The surface of Mars has experienced progressive oxidation, resulting in the formation of sulfate minerals as evidenced from surface exploration missions. However, no clear evidence for the presence of sulfate minerals has been reported within Martian
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53bf1592c2aa461d0689f01aa7149f92
https://doi.org/10.1016/j.gca.2021.08.026
https://doi.org/10.1016/j.gca.2021.08.026
Autor:
Hideharu Kuwahara, Ryoichi Nakada
Publikováno v:
Earth and Planetary Science Letters. 615:118197
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae0ac3b6546ddedc4e8cbfbc7c03c0c1
https://doi.org/10.1016/j.epsl.2023.118197
https://doi.org/10.1016/j.epsl.2023.118197
Autor:
Tomohiro Usui, Yusuke Sawaki, Fumihiro Matsu'ura, Masafumi Saitoh, Yuichiro Ueno, I. Kajitani, Ryoichi Nakada
Publikováno v:
Geochimica et Cosmochimica Acta. 306:20-43
The Ediacaran period was characterized by numerous events, including the emergence of large multi-cellular metazoans and surface environmental perturbations. This period was also characterized by an increase in atmospheric oxygen concentrations that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbc1221549b36ac2802d37fafc5e72b6
https://doi.org/10.1016/j.gca.2021.05.010
https://doi.org/10.1016/j.gca.2021.05.010
Publikováno v:
GEOCHEMICAL JOURNAL. 55:1-9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18049ec688a3a1cc61dffa8b91f96852
https://doi.org/10.2343/geochemj.2.0612
https://doi.org/10.2343/geochemj.2.0612
Publikováno v:
American Mineralogist. 105:1695-1703
The redox condition of magma determines the stability and composition of crystallizing and volatile phases in martian meteorites, reflecting the evolution of the martian interior. In the current study, direct analyses on the oxidation states of V, Cr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecb930671b120b137ebb563fe26da881
https://doi.org/10.2138/am-2020-7321
https://doi.org/10.2138/am-2020-7321
Autor:
Wenshuai Li, Xiao-Ming Liu, Ryoichi Nakada, Yoshio Takahashi, Yongfeng Hu, Mohsen Shakouri, Zhaofeng Zhang, Takuma Okumura, Shinya Yamada
Publikováno v:
Earth and Planetary Science Letters. 602:117962
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c21ba891195478d382379faaa228eb73
https://doi.org/10.1016/j.epsl.2022.117962
https://doi.org/10.1016/j.epsl.2022.117962