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  1. Article ; Online: Estimation of the depth of origin of fluids using noble gases in the surface sediments of submarine mud volcanoes off Tanegashima Island.

    Mitsutome, Yuki / Toki, Tomohiro / Kagoshima, Takanori / Sano, Yuji / Tomonaga, Yama / Ijiri, Akira

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 5051

    Abstract: The helium isotope ratio ( ...

    Abstract The helium isotope ratio (
    Language English
    Publishing date 2023-04-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-31582-z
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  2. Article ; Online: Differentiated agrarian vulnerabilities and generalized national responses to COVID-19 in the Upper West Region of Ghana.

    Baada, Jemima Nomunume / Antabe, Roger / Sano, Yuji

    Journal of agrarian change

    2021  Volume 21, Issue 3, Page(s) 604–619

    Abstract: The experiences of COVID-19 differ at both micro and macro levels. This emphasizes the need for differentiated responses that account for the varying vulnerabilities of diverse groups regarding the pandemic. In Ghana, much of the attention on COVID-19 ... ...

    Abstract The experiences of COVID-19 differ at both micro and macro levels. This emphasizes the need for differentiated responses that account for the varying vulnerabilities of diverse groups regarding the pandemic. In Ghana, much of the attention on COVID-19 has been on urban centres, particularly the country's two largest metropolises in southern Ghana. This has created a gap between national level policy and the experiences of COVID-19 among rural dwellers in Ghana. This is despite evidence that the world's poorest populations will bear the brunt of COVID-19 effects, and that globally, four out of five people living below the poverty line reside in rural areas. Using the Upper West Region as a case study, we discuss the differentiated vulnerabilities that agrarian communities in Ghana face regarding the pandemic. We situate our discussions within the theories of vulnerability and feminist political economy to highlight how interlocking vulnerabilities regarding historical, environmental, geopolitical, socio-economic, health, and gendered inequalities affect the disposition of agrarian communities to cope with and recover from the COVID-19 pandemic. We call for more nuanced COVID-19 responses that account for the needs and experiences of agrarian communities in Ghana.
    Language English
    Publishing date 2021-06-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 2056854-X
    ISSN 1471-0366 ; 1471-0358
    ISSN (online) 1471-0366
    ISSN 1471-0358
    DOI 10.1111/joac.12434
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  3. Article: Differentiated agrarian vulnerabilities and generalized national responses to COVID‐19 in the Upper West Region of Ghana

    Baada, Jemima Nomunume / Antabe, Roger / Sano, Yuji

    Journal of agrarian change. 2021 July, v. 21, no. 3

    2021  

    Abstract: The experiences of COVID‐19 differ at both micro and macro levels. This emphasizes the need for differentiated responses that account for the varying vulnerabilities of diverse groups regarding the pandemic. In Ghana, much of the attention on COVID‐19 ... ...

    Abstract The experiences of COVID‐19 differ at both micro and macro levels. This emphasizes the need for differentiated responses that account for the varying vulnerabilities of diverse groups regarding the pandemic. In Ghana, much of the attention on COVID‐19 has been on urban centres, particularly the country's two largest metropolises in southern Ghana. This has created a gap between national level policy and the experiences of COVID‐19 among rural dwellers in Ghana. This is despite evidence that the world's poorest populations will bear the brunt of COVID‐19 effects, and that globally, four out of five people living below the poverty line reside in rural areas. Using the Upper West Region as a case study, we discuss the differentiated vulnerabilities that agrarian communities in Ghana face regarding the pandemic. We situate our discussions within the theories of vulnerability and feminist political economy to highlight how interlocking vulnerabilities regarding historical, environmental, geopolitical, socio‐economic, health, and gendered inequalities affect the disposition of agrarian communities to cope with and recover from the COVID‐19 pandemic. We call for more nuanced COVID‐19 responses that account for the needs and experiences of agrarian communities in Ghana.
    Keywords COVID-19 infection ; case studies ; face ; issues and policy ; pandemic ; people ; politics ; poverty ; socioeconomics ; Ghana
    Language English
    Dates of publication 2021-07
    Size p. 604-619.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 2056854-X
    ISSN 1471-0366 ; 1471-0358
    ISSN (online) 1471-0366
    ISSN 1471-0358
    DOI 10.1111/joac.12434
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  4. Article: Uranium-Lead Systematics of Lunar Basaltic Meteorite Northwest Africa 2977.

    Moromoto, Narumi / Kawai, Yosuke / Terada, Kentaro / Miyahara, Masaaki / Takahata, Naoto / Sano, Yuji / Fujikawa, Naoko / Anand, Mahesh

    Mass spectrometry (Tokyo, Japan)

    2023  Volume 12, Issue 1, Page(s) A0115

    Abstract: Northwest Africa (NWA) 2977 is a lunar basaltic meteorite that was found in 2005 and has been classified as an olivine cumulate gabbro. This meteorite contains a shock melt vein (SMV) induced by an intense shock event. We report herein on ... ...

    Abstract Northwest Africa (NWA) 2977 is a lunar basaltic meteorite that was found in 2005 and has been classified as an olivine cumulate gabbro. This meteorite contains a shock melt vein (SMV) induced by an intense shock event. We report herein on an
    Language English
    Publishing date 2023-02-10
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 2670439-0
    ISSN 2186-5116 ; 2187-137X
    ISSN (online) 2186-5116
    ISSN 2187-137X
    DOI 10.5702/massspectrometry.A0115
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  5. Article ; Online: Temperature dependence of nitrogen solubility in bridgmanite and evolution of nitrogen storage capacity in the lower mantle.

    Fukuyama, Ko / Kagi, Hiroyuki / Inoue, Toru / Kakizawa, Sho / Shinmei, Toru / Sano, Yuji / Deligny, Cécile / Füri, Evelyn

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 3537

    Abstract: Relative nitrogen abundance normalized by carbonaceous chondrites in the bulk silicate Earth appears to be depleted compared to other volatile elements. Especially, nitrogen behavior in the deep part of the Earth such as the lower mantle is not clearly ... ...

    Abstract Relative nitrogen abundance normalized by carbonaceous chondrites in the bulk silicate Earth appears to be depleted compared to other volatile elements. Especially, nitrogen behavior in the deep part of the Earth such as the lower mantle is not clearly understood. Here, we experimentally investigated the temperature dependence of nitrogen solubility in bridgmanite which occupies 75 wt.% of the lower mantle. The experimental temperature ranged from 1400 to 1700 °C at 28 GPa in the redox state corresponding to the shallow lower mantle. The maximum nitrogen solubility in bridgmanite (MgSiO
    Language English
    Publishing date 2023-03-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-30556-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Author Correction: Heterogeneous nitrogen fixation rates confer energetic advantage and expanded ecological niche of unicellular diazotroph populations.

    Masuda, Takako / Inomura, Keisuke / Takahata, Naoto / Shiozaki, Takuhei / Sano, Yuji / Deutsch, Curtis / Prášil, Ondřej / Furuya, Ken

    Communications biology

    2023  Volume 6, Issue 1, Page(s) 614

    Language English
    Publishing date 2023-06-07
    Publishing country England
    Document type Published Erratum
    ISSN 2399-3642
    ISSN (online) 2399-3642
    DOI 10.1038/s42003-023-05007-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Fluid geochemistry and geothermal anomaly along the Yushu-Ganzi-Xianshuihe fault system, eastern Tibetan Plateau: Implications for regional seismic activity

    Liu, Wei / Guan, Lufeng / Liu, Yi / Xie, Xiangang / Zhang, Maoliang / Chen, Biying / Xu, Sheng / Sano, Yuji

    Journal of hydrology. 2022 Apr., v. 607

    2022  

    Abstract: Hydrothermal activity and seismicity are abundant along the Yushu-Ganzi-Xianshuihe fault system (YGXFS) in the eastern Tibetan Plateau. However, the processes and factors that control hydrothermal fluid circulation at a regional scale remain less ... ...

    Abstract Hydrothermal activity and seismicity are abundant along the Yushu-Ganzi-Xianshuihe fault system (YGXFS) in the eastern Tibetan Plateau. However, the processes and factors that control hydrothermal fluid circulation at a regional scale remain less constrained, and the relationship between geothermal anomaly and seismic activity is poorly known. In this study, we report an integrated dataset of thermal water chemistry (δ¹⁸OH₂O, δDH₂O, and δ¹³C of dissolved inorganic carbon (DIC)) to identify the origin, circulation path, and reservoir properties of hydrothermal fluids and then reveal the relationship between fluid circulation and seismic activity. The thermal waters are mainly classified as Na-HCO₃ type with minor Ca-Na-HCO₃ and Na-HCO₃-Cl types. The δ¹⁸OH₂O (−18.7‰ to −14.5‰) and δDH₂O (−142‰ to −110‰) values indicate recharge of meteoric waters, which infiltrated along the YGXFS to 2–6 km depths and underwent mixing with deep fluids prior to their discharge at the surface. A mass balance model based on δ¹³CDIC values (−4.3‰ to 5.9‰) and DIC contents of thermal waters reveals the involvement of CO₂-bearing fluids from mantle and thermo-metamorphic decarbonation of crustal marine limestones in tectonic CO₂ outgassing from the active fault. The estimated reservoir temperatures (85–336 °C) based on silica geothermometer of the thermal waters decrease from southeast to northwest along the YGXFS. Notably, the epicenters of strong earthquakes (Ms ≥ 6) are mostly located in the transition zone of geothermal anomalies according to spatial distribution of the reservoir temperatures. Combined with geological and geophysical information, we suggest that the heterogeneity of crustal thermal structure and the upwelling of deep fluids may play an essential role in the distribution of thermal springs and the high frequency of earthquakes along the YGXFS.
    Keywords carbon dioxide ; data collection ; dissolved inorganic carbon ; geochemistry ; geophysics ; hydrochemistry ; models ; silica ; tectonics ; China
    Language English
    Dates of publication 2022-04
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 1473173-3
    ISSN 1879-2707 ; 0022-1694
    ISSN (online) 1879-2707
    ISSN 0022-1694
    DOI 10.1016/j.jhydrol.2022.127554
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  8. Article: Sulfur assimilation in corals with aposymbiotic and symbiotic zooxanthellae

    Higuchi, Tomihiko / Tanaka, Kentaro / Shirai, Kotaro / Yuyama, Ikuko / Mezaki, Takuma / Takahata, Naoto / Sano, Yuji

    Environmental microbiology reports. 2021 Apr., v. 13, no. 2

    2021  

    Abstract: Although sulfate ions are the main form of sulfur in the ocean, there is limited knowledge on their use by living organisms. Stable isotope labelling and NanoSIMS analysis were used in this study to clarify how sulfate, in seawater, is assimilated by ... ...

    Abstract Although sulfate ions are the main form of sulfur in the ocean, there is limited knowledge on their use by living organisms. Stable isotope labelling and NanoSIMS analysis were used in this study to clarify how sulfate, in seawater, is assimilated by corals and zooxanthellae at the cellular level. Aposymbiotic and symbiotic coral juveniles from the genus Acropora were incubated for 2 days in filtered seawater with ³⁴S‐labelled sulfate. Further, the labelled corals were incubated for additional 2 days in natural seawater. Mapping of sulfur isotopes (³⁴S/³²S) showed that the ‘hotspots’ were enriched in ³⁴S on a sub‐micro level and were heterogeneously distributed in the coral soft tissues. Specifically, ³⁴S hotspots were found in both the symbiotic zooxanthellae and coral host tissues. In aposymbiotic corals, ³⁴S was detected in the tissues, indicating that the host corals directly assimilated the sulfate ions without any aid from the zooxanthellae. Even after 2 days in normal seawater, the ³⁴S label was clearly seen in both symbiotic and aposymbiotic corals, indicating that the assimilated sulfur was retained for at least 2 days.
    Keywords Acropora ; corals ; microbiology ; seawater ; stable isotopes ; sulfates ; sulfur
    Language English
    Dates of publication 2021-04
    Size p. 98-103.
    Publishing place John Wiley & Sons, Inc.
    Document type Article
    Note NAL-AP-2-clean ; JOURNAL ARTICLE
    ISSN 1758-2229
    DOI 10.1111/1758-2229.12908
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  9. Article ; Online: Hydrothermal He and CO2 degassing from a Y-shaped active fault system in eastern Tibetan Plateau with implications for seismogenic processes

    Liu, Wei / Zhang, Maoliang / Chen, Biying / Liu, Yi / Cao, Chunhui / Xu, Wang / Zheng, Guodong / Zhou, Xiaocheng / Lang, Yun-Chao / Sano, Yuji / Xu, Sheng

    Journal of Hydrology. 2023 May, v. 620 p.129482-

    2023  

    Abstract: Degassing of deeply-derived fluids (e.g., He and CO₂) prevails along seismically active faults in continental collision settings such as the Tibetan Plateau, where potential insights into seismogenesis through tectonic degassing remain less understood. ... ...

    Abstract Degassing of deeply-derived fluids (e.g., He and CO₂) prevails along seismically active faults in continental collision settings such as the Tibetan Plateau, where potential insights into seismogenesis through tectonic degassing remain less understood. Here, we present a quantitative geochemical study on hydrothermal gases from a Y-shaped active fault system in the eastern Tibetan Plateau, aiming to delineate how tectonic degassing (e.g., fluid origin and transport) may be linked to seismogenic processes in continental collision settings. Our results show that (i) vigorous degassing of mantle- and crustal-derived CO₂-rich fluids (³He/⁴He = 0.94–2.73 Ra, where Ra = air ³He/⁴He; δ¹³CCO₂ = −8.9 to −2.6‰) dominates the axis zone of the Y-shaped active fault system, while (ii) crustal fluid inputs become more prevalent along its NW branching fault (³He/⁴He = 0.03–0.62 Ra; δ¹³CCO₂ = −8.9 to −0.2‰) and the NE and SE branches (³He/⁴He = 0.01–0.07 Ra; δ¹³CCO₂ = −17.3 to −5.2‰). Localized mantle melting and metamorphic decarbonization likely produce the CO₂-rich fluids, which could account for significantly higher CO₂ flux in the axis zone (9.66 × 10⁹ mol/yr) than along the NW branch (1.25 × 10⁹ mol/yr). The well-correlated ³He/⁴He ratios and slip rates suggest a genetic model in which the uprising CO₂-rich fluids may facilitate rapid fault slip and enhanced fault permeability, which could in turn lead to efficient mantle He degassing. Taking the fluid origin and transport, CO₂ fluxes, and regional seismicity together, we suggest that the deeply-derived CO₂-rich fluids may contribute to overpressure involved in seismogenic processes of the Y-shaped active fault system.
    Keywords air ; carbon dioxide ; genetic models ; hydrology ; permeability ; tectonics ; China ; Gas geochemistry ; Volatile fluxes ; Tectonic degassing ; Seismogenic processes ; Eastern Tibetan Plateau
    Language English
    Dates of publication 2023-05
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 1473173-3
    ISSN 1879-2707 ; 0022-1694
    ISSN (online) 1879-2707
    ISSN 0022-1694
    DOI 10.1016/j.jhydrol.2023.129482
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  10. Article ; Online: Antenatal care and skilled birth in the fragile and conflict-affected situation of Burundi.

    Ziegler, Bianca R / Kansanga, Moses / Sano, Yuji / Kangmennaang, Joseph / Kpienbaareh, Daniel / Luginaah, Isaac

    The International journal of health planning and management

    2021  Volume 36, Issue 4, Page(s) 1081–1106

    Abstract: Burundi is a fragile and conflict-affected state characterized by persistent conflict and political violence. Amid this conflict, Burundi has one of the highest maternal mortality rates globally-548 per 100,000 births as of 2017, such deaths could be ... ...

    Abstract Burundi is a fragile and conflict-affected state characterized by persistent conflict and political violence. Amid this conflict, Burundi has one of the highest maternal mortality rates globally-548 per 100,000 births as of 2017, such deaths could be prevented with antenatal care (ANC). This cross-sectional study aimed to examine the association between conflict and ANC and skilled birth attendant (SBA) utilization. Logistic regression analysis was conducted using the 2016-2017 Burundi Demographic and Health Survey (n = 8581), as well as a Near Analysis Geographic Information System exploration. Results show that women in extremely high conflict regions were less likely to have four antenatal visits (odds ratio [OR] = 0.79, p < 0.05). However, they were more likely to use a SBA (OR = 2.31, p < 0.001) and to deliver in a hospital (OR = 1.69, p < 0.001). As well, gender equality, education, and watching television were correlated with an increased likelihood of utilization. In contrast, unwanted pregnancies and increased parity were correlated with decreased use. Moreover, with renewed violence erupting in 2015, uptake of care has likely further stagnated or declined. If Sustainable Development Goal 3.1's objective of reducing maternal mortality globally is to be achieved, women's access to maternal healthcare services in conflicted-affected areas such as Burundi must be improved.
    MeSH term(s) Burundi ; Cross-Sectional Studies ; Delivery, Obstetric ; Female ; Humans ; Maternal Health Services ; Maternal Mortality ; Pregnancy ; Prenatal Care ; Socioeconomic Factors
    Language English
    Publishing date 2021-03-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 632786-2
    ISSN 1099-1751 ; 0749-6753
    ISSN (online) 1099-1751
    ISSN 0749-6753
    DOI 10.1002/hpm.3157
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