Zobrazeno 1 - 10
of 209
pro vyhledávání: '"Takeshi Ohba"'
Autor:
Tomoya Obase, Hirochika Sumino, Kotaro Toyama, Kaori Kawana, Kohei Yamane, Muga Yaguchi, Akihiko Terada, Takeshi Ohba
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-12 (2022)
Abstract We repeatedly measured isotopic compositions of noble gases and CO2 in volcanic gases sampled at six fumaroles around the Kusatsu-Shirane volcano (Japan) between 2014 and 2021 to detect variations reflecting recent volcanic activity. The syn
Externí odkaz:
https://doaj.org/article/e7ce28e339364b56a02028c0e4a9a5d1
Publikováno v:
Earth, Planets and Space, Vol 74, Iss 1, Pp 1-5 (2022)
Externí odkaz:
https://doaj.org/article/742df9e1395f4336a769bf05266fc58c
Autor:
Engome R. Wotany, Mengnjo J. Wirmvem, Wilson Y. Fantong, Samuel N. Ayonghe, Mabel N. Wantim, Takeshi Ohba
Publikováno v:
Applied Water Science, Vol 11, Iss 8, Pp 1-14 (2021)
Abstract The link between rainfall and groundwater recharge in the Rio del Rey Basin, which is of socio-economic importance to Cameroon, is poorly understood. Accordingly, the stable isotopes in monthly rainfall from January to December 2012 (in Lobe
Externí odkaz:
https://doaj.org/article/ba902c85517a4d978f1741168262cc6b
Autor:
Takeshi Ohba, Yu Oginuma, Kazuto Saiki, Minoru Kusakabe, Issa, Takounjou A. Fouepe, Romaric Ntchantcho, Gregory Tanyileke, Joseph V. Hell
Publikováno v:
Frontiers in Earth Science, Vol 10 (2022)
In 1984, a limnic eruption occurred in Lake Monoun, Cameroon, and the CO2 gas released from the lake surface resulted in casualties in the neighboring communities. Subsequent scientific research revealed that the CO2 gas released from the lake surfac
Externí odkaz:
https://doaj.org/article/dda8ed49c70e4c67af61ac793a9120ba
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-17 (2021)
Abstract Direct sampling and analysis of fumarolic gas was conducted at Ebinokogen Ioyama volcano, Japan, between December 2015 and July 2020. Notable changes in the chemical composition of gases related to volcanic activity included a sharp increase
Externí odkaz:
https://doaj.org/article/a64f104f948f447289097ab824aacd71
Publikováno v:
Frontiers in Earth Science, Vol 9 (2022)
Regular sampling of lake water has been performed at many volcanoes to assess the state of volcanic activity. However, it is not clear whether the absolute concentrations or, instead, rate of changes in concentrations are more suitable for such asses
Externí odkaz:
https://doaj.org/article/a7977c82562546c8afc97336528ffce1
Publikováno v:
Frontiers in Earth Science, Vol 9 (2021)
Interpreting the triggering mechanisms for phreatic eruptions is a key to improving the hazard assessment of crater lakes. Yugama Crater Lake at Kusatsu-Shirane volcano, Japan, is the site of frequent phreatic eruptions with the recent eruptions in 1
Externí odkaz:
https://doaj.org/article/3cd10337bcc646378f4d2e70eaf28d23
Publikováno v:
Frontiers in Earth Science, Vol 9 (2021)
Gases dissolved in the deep water of lakes can pose a hazard when extreme concentrations are reached. A sudden release of large amounts of gas can cost the lives of humans living in the neighbourhood, as happened at Lake Nyos in 1986. Since 2001, the
Externí odkaz:
https://doaj.org/article/6c973486647f453f8da4d082b402b91a
Autor:
Takeshi Ohba, Muga Yaguchi, Kana Nishino, Nozomi Numanami, Yasushi Daita, Chiho Sukigara, Masanori Ito, Urumu Tsunogai
Publikováno v:
Earth, Planets and Space, Vol 71, Iss 1, Pp 1-18 (2019)
Abstract Definite increases in the components ratios of CO2/H2O, CO2/H2S, CO2/CH4 and He/CH4 were observed at the fumarolic gases from Owakudani geothermal area located at the center of Hakone volcanic caldera (Honshu Island, Japan), synchronized wit
Externí odkaz:
https://doaj.org/article/55c26b12e0c54f0ebe94d090cface691
Publikováno v:
Drug Delivery, Vol 26, Iss 1, Pp 935-943 (2019)
Magnetically guided cell delivery systems would be valuable to achieve effective macrophage-based cell therapy for colonic inflammatory diseases. In the current study, we developed a method for the efficient and simultaneous introduction of superpara
Externí odkaz:
https://doaj.org/article/e2e6470b2b0349caa84848c7aae48239