Zobrazeno 1 - 10 of 184 pro vyhledávání: '"Toshitaka Gamo"'
1
Akademický článek
A Systematic Assessment of Stable Sr Isotopic Compositions of Vent Fluids in Arc/Back-Arc Hydrothermal Systems: Effects of Host Rock Type, Phase Separation, and Overlying Sediment
Autor: Toshihiro Yoshimura, Shigeyuki Wakaki, Tsuyoshi Ishikawa, Toshitaka Gamo, Daisuke Araoka, Naohiko Ohkouchi, Hodaka Kawahata
Publikováno v: Frontiers in Earth Science, Vol 8 (2020)
Variations in the stable isotopic composition of seawater Sr (δ88Sr) is a new tool for estimating the rates of global carbonate sedimentation over geologic time, yet the isotope compositions of the major sources and sinks of Sr to the world oceans a
Externí odkaz: https://doaj.org/article/1b110adff85a4672bcf076e4b15f195c
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2
Akademický článek
Distribution of helium-3 plumes and deep-sea circulation in the central Indian Ocean
Autor: Naoto Takahata, Kotaro Shirai, Kazuto Ohmori, Hajime Obata, Toshitaka Gamo, Yuji Sano
Publikováno v: Terrestrial, Atmospheric and Oceanic Sciences, Vol 29, Iss 3, Pp 331-340 (2018)
We report helium isotope data collected in the central Indian Ocean, from the Arabian Sea to the Southern Ocean, during a Japanese GEOTRACES cruise in 2009 - 2010. We found hydrothermal helium-3 plumes and confirmed that 3He/4He ratio anomalies were
Externí odkaz: https://doaj.org/article/91090cba3c3c4725a8b6a61a2b83ff1d
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3
Akademický článek
Anthropogenic Lead Emissions in the Ocean: The Evolving Global Experiment
Autor: Edward A. Boyle, Jong-Mi Lee, Yolanda Echegoyan, Abigail Noble, Simone Moos, Gonzalo Carrasco, Ning Zhao, Richard Keyser, Jing Zhang, Toshitaka Gamo, Hajime Obata, Kazuhiro Norisuye
Publikováno v: Oceanography, Vol 27, Iss 1, Pp 69-75 (2014)
We review the current distribution of lead and lead isotopes in the ocean with regard to the evolving pattern of human emissions during the past decades and centuries.
Externí odkaz: https://doaj.org/article/e8989f4c2973486e9057ee53445d39e2
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5
Neodymium concentration and isotopic composition distributions in the southwestern Indian Ocean and the Indian sector of the Southern Ocean
Autor: Katsuhiko Suzuki, Hiroshi Amakawa, Hirofumi Tazoe, Yuji Sano, Chuan-Chou Shen, Hajime Obata, Toshitaka Gamo, Tsai-Luen Yu
Publikováno v: Chemical Geology. 511:190-203
Neodymium concentration and isotopic composition profiles were determined for two stations in the Crozet Basin in the southwestern Indian Ocean and one station in the Indian sector of the Southern Ocean. The station located in the northern part of th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d8444571609947be9d5788a971809862
https://doi.org/10.1016/j.chemgeo.2019.01.007
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7
Distribution of Dissolved Zinc in the Western and Central Subarctic North Pacific
Autor: Toshitaka Gamo, Jun Nishioka, Hajime Obata, Taejin Kim
Publikováno v: Global Biogeochemical Cycles. 31:1454-1468
We investigated the biogeochemical cycling of dissolved zinc (Zn) in the western and central subarctic North Pacific during the GEOTRACES GP 02 cruise. The relationship between dissolved Zn and silicate in the subarctic North Pacific plotted as a con
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::492c6993e6a4e4f1a284509a39b612ff
https://doi.org/10.1002/2017gb005711
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8
Sea-to-air flux of dimethyl sulfide in the South and North Pacific Ocean as measured by proton transfer reaction-mass spectrometry coupled with the gradient flux technique
Autor: Mitsuo Uematsu, Kohei Ikeda, Sohiko Kameyama, Hiroshi Ogawa, Yuko Omori, Toru Iwata, Hiroshi Tanimoto, Satoshi Inomata, Toshitaka Gamo, Ken Furuya
Publikováno v: Journal of Geophysical Research: Atmospheres. 122:7216-7231
Exchange of dimethylsulfide (DMS) between the surface ocean and the lower atmosphere was examined by using Proton Transfer Reaction-Mass Spectrometry coupled with the Gradient Flux (PTR-MS/GF) system. We deployed the PTR-MS/GF system and observed ver
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b40a2ff47607c221e8c7b8392fef84ec
https://doi.org/10.1002/2017jd026527
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9
Colorimetric Detection of Mercury(II) Ion in Aqueous Solution Using Silver Nanoparticles
Autor: Renat R. Khaydarov, Ikka Fitriani, M. Lutfi Firdaus, Yeni Wahyuni Hartati, Toshitaka Gamo, Santhy Wyantuti, Jason A. McAlister, Hajime Obata
Publikováno v: Analytical Sciences. 33:831-837
Novel green-chemistry synthesis of silver nanoparticles (AgNPs) is introduced as a low-cost, rapid and easy-to-use analytical method for mercury ion detection. Aqueous fruit extract of water apple (Syzygium aqueum) was used for the first time as bior
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f19cec226208d3b89197860e8051d8ff
https://doi.org/10.2116/analsci.33.831
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10
Dissolved iron and zinc in Sagami Bay and the Izu-Ogasawara Trench
Autor: Toshitaka Gamo, Jun Nishioka, Kazuhiro Norisuye, Yohei Wakuta, Shigenobu Takeda, Taejin Kim, Hajime Obata
Publikováno v: Journal of Oceanography. 73:333-344
Using a clean seawater sampling system for trace metals onboard the R. V. Shinsei-Maru, newly launched in 2013, we investigated the vertical distributions of dissolved iron and zinc in Sagami Bay and the Izu-Ogasawara Trench. We applied appropriate c
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cd031255b17cada2183cf16319d79533
https://doi.org/10.1007/s10872-016-0407-8
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