Works by Takeshi Ohba

Results: 30

Geochemical Behavior of REE in Stream Water and Sediments in the Gold-Bearing Lom Basin, Cameroon: Implications for Provenance and Depositional Environment.

Published in:

Aquatic Geochemistry, 2020, v. 26, n. 1, p. 53, doi. 10.1007/s10498-019-09365-8

By:

Mimba, Mumbfu Ernestine;
Wirmvem, Mengnjo Jude;
Nguemhe Fils, Salomon César;
Numanami, Nozomi;
Nforba, Melvin Tamnta;
Ohba, Takeshi;
Aka, Festus Tongwa;
Suh, Cheo Emmanuel

Publication type:

Article

Coseismic changes in the chemical composition of volcanic gases from the Owakudani geothermal area on Hakone volcano, Japan.

Published in:

Bulletin of Volcanology, 2011, v. 73, n. 4, p. 457, doi. 10.1007/s00445-010-0445-9

By:

Ohba, Takeshi;
Daita, Yasushi;
Sawa, Takeshi;
Taira, Noriyasu;
Kakuage, Yusuke

Publication type:

Article

Development of a new device for CO<sub>2</sub> microdiffusion analysis of fluid samples from volcanic areas without using a fixative.

Published in:

Earth, Planets & Space, 2024, v. 76, n. 1, p. 1, doi. 10.1186/s40623-024-02062-z

By:

Yaguchi, Muga;
Ohba, Takeshi

Publication type:

Article

Geochemical features and petrology of ignimbrite deposits from Bamenda volcano, Western Highlands of the Cameroon Volcanic Line.

Published in:

Arabian Journal of Geosciences, 2022, v. 15, n. 7, p. 1, doi. 10.1007/s12517-022-09928-0

By:

Gountié Dedzo, Merlin;
Fozing, Eric Martial;
Chako-Tchamabé, Boris;
Biakan à Nyotok, Pierre Christel;
Diddi Hamadjoda, Djamilatou;
Asaah, Asobo Nkengmatia Elvis;
Zangmo Tefogoum, Ghislain;
Kamgang, Pierre;
Ohba, Takeshi

Publication type:

Article

Disaster prevention, disaster preparedness and local community resilience within the context of disaster risk management in Cameroon.

Published in:

Natural Hazards, 2017, v. 86, n. 1, p. 57, doi. 10.1007/s11069-016-2674-5

By:

Aka, Festus;
Buh, Gaston;
Fantong, Wilson;
Issa;
Zouh, Isabella;
Djomou, Serges;
Ghogomu, Richard;
Gibson, Terry;
Marmol del, Mary-Ann;
Sigha, Luc;
Ohba, Takeshi;
Kusakabe, Minoru;
Yoshida, Yutaka;
Tanyileke, Gregory;
Nnange, Joseph;
Hell, Joseph

Publication type:

Article

Variation of hydrogeochemical characteristics of water in surface flows, shallow wells, and boreholes in the coastal city of Douala (Cameroon).

Published in:

Hydrological Sciences Journal/Journal des Sciences Hydrologiques, 2016, v. 61, n. 16, p. 2916, doi. 10.1080/02626667.2016.1173789

By:

Fantong, Wilson Y.;
Kamtchueng, Brice T.;
Ketchemen-Tandia, Beatrice;
Kuitcha, Doris;
Ndjama, Josephine;
Fouepe, Alain T.;
Takem, Gloria E.;
Issa;
Wirmvem, Mengnjo J.;
Djomou, Serges L. Bopda;
Ako, Andrew A.;
Nkeng, George E.;
Kusakabe, Minoru;
Ohba, Takeshi

Publication type:

Article

Bacterial and archaeal communities in Lake Nyos (Cameroon, Central Africa).

Published in:

Scientific Reports, 2014, p. 1, doi. 10.1038/srep06151

By:

Tiodjio, Rosine E.;
Akihiro Sakatoku;
Akihiro Nakamura;
Daisuke Tanaka;
Fantong, Wilson Y.;
Tchakam, Kamtchueng B.;
Gregory Tanyileke;
Takeshi Ohba;
Hell, Victor J.;
Minoru Kusakabe;
Shogo Nakamura;
Ueda, Akira

Publication type:

Article

Enhanced macrophage delivery to the colon using magnetic lipoplexes with a magnetic field.

Published in:

Drug Delivery, 2019, v. 26, n. 1, p. 935, doi. 10.1080/10717544.2019.1662515

By:

Kono, Yusuke;
Gogatsubo, Serika;
Ohba, Takeshi;
Fujita, Takuya

Publication type:

Article

Regional geochemical baseline concentration of potentially toxic trace metals in the mineralized Lom Basin, East Cameroon: a tool for contamination assessment.

Published in:

Geochemical Transactions, 2018, v. 19, n. 1, p. 1, doi. 10.1186/s12932-018-0056-5

By:

Mimba, Mumbfu Ernestine;
Ohba, Takeshi;
Nguemhe Fils, Salomon César;
Nforba, Melvin Tamnta;
Numanami, Nozomi;
Bafon, Tasin Godlove;
Aka, Festus Tongwa;
Suh, Cheo Emmanuel

Publication type:

Article

Discharge rate of SO<sub>2</sub> from Unzen Volcano, Kyushu, Japan.

Published in:

Geophysical Research Letters, 1995, v. 22, n. 13, p. 1709, doi. 10.1029/95GL01319

By:

Hirabayashi, Jun-ichi;
Ohba, Takeshi;
Nogami, Kenji;
Yoshida, Minoru

Publication type:

Article

Influence of deep magmatic source region in the growth of complex maar‐diatreme volcanoes.

Published in:

Geological Journal, 2024, v. 59, n. 2, p. 680, doi. 10.1002/gj.4887

By:

Chako‐Tchamabé, Boris;
Graettinger, Alison;
Gountié Dedzo, Merlin;
Tamen, Jules;
Nemeth, Károly;
Weber, Bodo;
Fozing, Eric Martial;
Silis‐Esquivel, Jhoanna;
Asaah, Asobo Elvis Nkengmatia;
Youmen, Dieudonné;
Ohba, Takeshi

Publication type:

Article

Isotopic composition of precipitation and groundwater onshore of the Rio del Rey Basin, southwest Cameroon: local meteoric lines and recharge.

Published in:

Applied Water Science, 2021, v. 11, n. 8, p. 1, doi. 10.1007/s13201-021-01473-7

By:

Wotany, Engome R.;
Wirmvem, Mengnjo J.;
Fantong, Wilson Y.;
Ayonghe, Samuel N.;
Wantim, Mabel N.;
Ohba, Takeshi

Publication type:

Article

Variation in stable isotope ratios of monthly rainfall in the Douala and Yaounde cities, Cameroon: local meteoric lines and relationship to regional precipitation cycle.

Published in:

Applied Water Science, 2017, v. 7, n. 5, p. 2343, doi. 10.1007/s13201-016-0413-4

By:

Wirmvem, Mengnjo Jude;
Takeshi Ohba;
Kamtchueng, Brice Tchakam;
Taylor, Eldred Tunde;
Fantong, Wilson Yetoh;
Ako, Ako Andrew

Publication type:

Article

Shallow groundwater recharge mechanism and apparent age in the Ndop plain, northwest Cameroon.

Published in:

Applied Water Science, 2017, v. 7, n. 1, p. 489, doi. 10.1007/s13201-015-0268-0

By:

Mengnjo Jude Wirmvem;
Mimba, Mumbfu Ernestine;
Brice Tchakam Kamtchueng;
Wotany, Engome Regina;
Bafon, Tasin Godlove;
Asobo Nkengmatia Elvis Asaah;
Fantong, Wilson Yetoh;
Ayonghe, Samuel Ndonwi;
Takeshi Ohba

Publication type:

Article

Variations in thermal state revealed by the geochemistry of fumarolic gases and hot-spring waters of the Tateyama volcanic hydrothermal system, Japan.

Published in:

Bulletin of Volcanology, 2019, v. 81, n. 2, p. 1, doi. 10.1007/s00445-018-1264-7

By:

Seki, Kaori;
Ohba, Takeshi;
Aoyama, Shinnosuke;
Ueno, Yuichiro;
Sumino, Hirochika;
Kanda, Wataru;
Yaguchi, Muga;
Tanbo, Toshiya

Publication type:

Article

Special issue "Understanding phreatic eruptions - recent observations of Kusatsu-Shirane volcano and equivalents -".

Published in:

Earth, Planets & Space, 2022, v. 74, n. 1, p. 1, doi. 10.1186/s40623-022-01643-0

By:

Ogawa, Yasuo;
Ohba, Takeshi;
Fischer, Tobias P.;
Yamamoto, Mare;
Jolly, Art

Publication type:

Article

Behavior of magmatic components in fumarolic gases related to the 2018 phreatic eruption at Ebinokogen Ioyama volcano, Kirishima Volcanic Group, Kyushu, Japan.

Published in:

Earth, Planets & Space, 2021, v. 73, n. 1, p. 1, doi. 10.1186/s40623-021-01405-4

By:

Ohba, Takeshi;
Yaguchi, Muga;
Tsunogai, Urumu;
Ito, Masanori;
Shingubara, Ryo

Publication type:

Article

Volcanic Ash from the June 17, 1962 Eruption of Yakedake Volcano: Stereomicroscopic, XRD, and Water-Soluble Components Analyses.

Published in:

Journal of Disaster Research, 2022, v. 17, n. 2, p. 257, doi. 10.20965/jdr.2022.p0257

By:

Yaguchi, Muga;
Ohba, Takeshi;
Hirayama, Yasuo;
Numanami, Nozomi

Publication type:

Article

Constituent Mineral and Water-Soluble Components of Volcanic Ash from the 2018 Eruption of Mt. Motoshirane of Kusatsu-Shirane Volcano, Japan.

Published in:

Journal of Disaster Research, 2019, v. 14, n. 7, p. 991, doi. 10.20965/jdr.2019.p0991

By:

Muga Yaguchi;
Takeshi Ohba;
Nozomi Numanami;
Ryohei Kawaguchi

Publication type:

Article

Time Variation in the Chemical and Isotopic Composition of Volcanic Gas at Mt. Mihara of Izu-Oshima Island, Japan.

Published in:

Journal of Disaster Research, 2019, v. 14, n. 7, p. 972, doi. 10.20965/jdr.2019.p0972

By:

Takeshi Ohba;
Muga Yaguchi;
Kana Nishino;
Nozomi Numanami

Publication type:

Article

Alteration of argyrophilic nucleolar organizer region associated (Ag-NOR) proteins in apoptosis-induced human salivary gland cells and human oral squamous carcinoma cells.

Published in:

2001

By:

Morimoto, Yasuhiro;
Kito, Shinji;
Ohba, Takeshi;
Morimoto, Hiroyuki;
Okamura, Hirohiko;
Haneji, Tatsuji;
Morimoto, Y;
Kito, S;
Ohba, T;
Morimoto, H;
Okamura, H;
Haneji, T

Publication type:

journal article

Baseline concentrations of trace metals in stream sediments of the lower Lom Basin, East Cameroon: Implications for environmental studies.

Published in:

Geophysical Research Abstracts, 2018, v. 20, p. 392

By:

Mimba, Mumbfu;
Takeshi Ohba;
Fils, Salomon Nguemhe;
Nforba, Melvin;
Numanami, Nozomi;
Bafon, Tasin;
Aka, Festus;
Cheo Suh

Publication type:

Article

Time variations in the chemical and isotopic composition of fumarolic gases at Hakone volcano, Honshu Island, Japan, over the earthquake swarm and eruption in 2015, interpreted by magma sealing model.

Published in:

Earth, Planets & Space, 2019, v. 71, n. 1, p. N.PAG, doi. 10.1186/s40623-019-1027-5

By:

Ohba, Takeshi;
Yaguchi, Muga;
Nishino, Kana;
Numanami, Nozomi;
Daita, Yasushi;
Sukigara, Chiho;
Ito, Masanori;
Tsunogai, Urumu

Publication type:

Article

Water sampling using a drone at Yugama crater lake, Kusatsu-Shirane volcano, Japan.

Published in:

Earth, Planets & Space, 2018, v. 70, n. 1, p. 1, doi. 10.1186/s40623-018-0835-3

By:

Terada, Akihiko;
Morita, Yuichi;
Hashimoto, Takeshi;
Mori, Toshiya;
Ohba, Takeshi;
Yaguchi, Muga;
Kanda, Wataru

Publication type:

Article

Hydrogeochemistry and quality of surface water and groundwater in the vicinity of Lake Monoun, West Cameroon: approach from multivariate statistical analysis and stable isotopic characterization.

Published in:

Environmental Monitoring & Assessment, 2016, v. 188, n. 9, p. N.PAG, doi. 10.1007/s10661-016-5514-x

By:

Kamtchueng, Brice T.;
Fantong, Wilson Y.;
Wirmvem, Mengnjo J.;
Tiodjio, Rosine E.;
Takounjou, Alain F.;
Ndam Ngoupayou, Jules R.;
Kusakabe, Minoru;
Zhang, Jing;
Ohba, Takeshi;
Tanyileke, Gregory;
Hell, Joseph V.;
Ueda, Akira

Publication type:

Article

Monitoring of magmatic–hydrothermal system by noble gas and carbon isotopic compositions of fumarolic gases.

Published in:

Scientific Reports, 2022, v. 12, n. 1, p. 1, doi. 10.1038/s41598-022-22280-3

By:

Obase, Tomoya;
Sumino, Hirochika;
Toyama, Kotaro;
Kawana, Kaori;
Yamane, Kohei;
Yaguchi, Muga;
Terada, Akihiko;
Ohba, Takeshi

Publication type:

Article

Noble gas and stable isotope geochemistry of thermal fluids from Deception Island, Antarctica.

Published in:

Antarctic Science, 2009, v. 21, n. 3, p. 255, doi. 10.1017/S0954102009001783

By:

Kusakabe, Minoru;
Nagao, Keisuke;
Ohba, Takeshi;
Jung Hun Seo;
Sung-Hyun Park;
Jong Ik Lee;
Byong-Kwon Park

Publication type:

Article

Effect of diffuse recharge and wastewater on groundwater contamination in Douala, Cameroon.

Published in:

Environmental Earth Sciences, 2017, v. 76, n. 9, p. 1, doi. 10.1007/s12665-017-6692-8

By:

Wirmvem, Mengnjo;
Ohba, Takeshi;
Nche, Linus;
Kamtchueng, Brice;
Kongnso, Wiylahnyuy;
Mimba, Mumbfu;
Bafon, Tasin;
Yaguchi, Muga;
Takem, Gloria;
Fantong, Wilson;
Ako, Ako

Publication type:

Article

Hydrochemical and isotopic characteristics of groundwater in the Ndop plain, northwest Cameroon: resilience to seasonal climatic changes.

Published in:

Environmental Earth Sciences, 2014, v. 72, n. 9, p. 3585, doi. 10.1007/s12665-014-3265-y

By:

Wirmvem, Mengnjo;
Ohba, Takeshi;
Suila, Justice;
Fantong, Wilson;
Bate, Nchemty;
Ooki, Seigo;
Wotany, Engome;
Asaah, Asobo;
Ayonghe, Samuel;
Tanyileke, Gregory;
Hell, Joseph

Publication type:

Article

Assessment of shallow groundwater in Lake Nyos catchment (Cameroon, Central-Africa): implications for hydrogeochemical controls and uses.

Published in:

Environmental Earth Sciences, 2014, v. 72, n. 9, p. 3663, doi. 10.1007/s12665-014-3278-6

By:

Kamtchueng, Brice;
Fantong, Wilson;
Ueda, Akira;
Tiodjio, Edwige;
Anazawa, Katsuro;
Wirmvem, Mengnjo;
Mvondo, Joseph;
Nkamdjou, Luc;
Kusakabe, Minoru;
Ohba, Takeshi;
Tanyileke, Gregory;
Hell, Joseph

Publication type:

Article