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  1. No Access

    Article

    Longitudinal impact of multi-segment spinal fixation surgery on mobility status and clinical outcomes in adult spinal deformity: a multicenter retrospective study

    To investigate changes in postoperative mobility status in patients with ASD, and the determining factors that influence these changes and their impact on clinical outcomes, including the rate of home discharg...

    Jun Ouchida, Hiroaki Nakashima, Sadayuki Ito, Naoki Segi in European Spine Journal (2024)

  2. No Access

    Article

    Does global spinal alignment affect the use of walking aids after multi-segment spinal fixation for patients with ASD? A multicenter retrospective study

    This study aimed to clarify the relation between global spinal alignment and the necessity of walking aid use in patients with adult spinal deformity (ASD) and to investigate the impact of spinal fixation on m...

    Jun Ouchida, Hiroaki Nakashima, Sadayuki Ito, Naoki Segi in European Spine Journal (2024)

  3. No Access

    Article

    Preoperative low Hounsfield units in the lumbar spine are associated with postoperative mechanical complications in adult spinal deformity

    To determine the most valid bone health parameter to predict mechanical complications (MCs) following surgery for adult spinal deformity (ASD).

    Ippei Yamauchi, Hiroaki Nakashima, Sadayuki Ito, Naoki Segi in European Spine Journal (2024)

  4. Article

    Open Access

    Metagenomic analysis of the microbial communities and associated network of nitrogen metabolism genes in the Ryukyu limestone aquifer

    While microbial biogeochemical activities such as those involving denitrification and sulfate reduction have been considered to play important roles in material cycling in various aquatic ecosystems, our curre...

    Rio Maruyama, Ko Yasumoto, Nanami Mizusawa, Mariko Iijima in Scientific Reports (2024)

  5. No Access

    Article

    Petrogenetic and geodynamic evolution of plutonic rocks from the Chadormalu district, Kashmar-Kerman tectonic zone, Central Iran

    Late Precambrian–Early Paleozoic igneous rocks constitute volumetrically minor components of the Iranian Plateau but preserve important information about the magmatic and tectonic history of the northern Gondw...

    Niloofar Nayebi, Dariush Esmaeily, Ryuichi Shinjo in Mineralogy and Petrology (2023)

  6. No Access

    Article

    Geology and geochemistry of metasomatite rocks associated with Kiruna iron oxide apatite and the evolution of fluids responsible for metasomatism in Choghart and Chadormalu deposits (Bafq mining district, Central Iran)

    The Choghart and Chadormalu iron deposits in Bafq metallogenic zone in Central Iran are classified as Kiruna-type deposits and surrounded by metasomatic rocks which Russian experts named them metasomatite. The...

    Somayeh Teimouri, Mansour Ghorbani, Ryuichi Shinjo in Arabian Journal of Geosciences (2023)

  7. Article

    Open Access

    Sr isotopic ratios of hydrothermal fluids from the Okinawa Trough and the implications of variation in fluid–sediment interactions

    Sr isotope ratios of hydrothermal fluids were observed at five sediment-associated sites in the Okinawa Trough to investigate the diversity of subseafloor fluid–rock–sediment interactions. The estimated 87Sr/86Sr...

    Tomohiro Toki, Tasuku Nohara, Yoshiaki Urata in Progress in Earth and Planetary Science (2022)

  8. Article

    Open Access

    Last glacial temperature reconstructions using coupled isotopic analyses of fossil snails and stalagmites from archaeological caves in Okinawa, Japan

    We applied a new geoarchaeological method with two carbonate archives, which are fossil snails from Sakitari Cave and stalagmites from Gyokusen Cave, on Okinawa Island, Japan, to reconstruct surface air temper...

    Ryuji Asami, Rikuto Hondo, Ryu Uemura, Masaki Fujita, Shinji Yamasaki in Scientific Reports (2021)

  9. Article

    Open Access

    Reconstruction of ocean environment time series since the late nineteenth century using sclerosponge geochemistry in the northwestern subtropical Pacific

    The geochemistry of calcifying marine organisms is an excellent proxy for reconstructing paleoceanographic history, but studies of hypercalcified demosponges (sclerosponges) are considerably fewer than those o...

    Ryuji Asami, Taketo Matsumori, Ryuichi Shinjo in Progress in Earth and Planetary Science (2021)

  10. No Access

    Article

    Petrogenesis of gem sapphire in a pegmatite-aplite vein from the Alvand batholith, Western Iran

    In the Hamadan region, Sanandaj-Sirjan Zone (SaSiZ), W Iran, a pegmatite-aplite vein occurs that contains up to 15 vol% sapphire. The Hamadan sapphire is black to blue, and translucent to opaque, which reveals...

    Rasoul Sheikhi Gheshlaghi, Mansour Ghorbani, Ali Asghar Sepahi in Mineralogy and Petrology (2020)

  11. Article

    Open Access

    Evaluation of geochemical records as a paleoenvironmental proxy in the hypercalcified demosponge Astrosclera willeyana

    The geochemistry of the calcium carbonates of marine organisms is an excellent proxy for reconstruction of the paleoceanographic history. However, previous studies of hypercalcified demosponges (sclerosponges)...

    Ryuji Asami, Akira Kinjo, Daiki Ohshiro in Progress in Earth and Planetary Science (2020)

  12. No Access

    Article

    Features in REE and Methane Anomalies Distribution in the East China Sea Water Column: a Comparison with the South China Sea

    This paper presents review of dissolved Rare Earth Elements (REE) and methane anomalies distribution in the East China Sea water column. In general, the REE concentrations of the shelf water are markedly highe...

    Le Duc Luong, Renat B. Shakirov, Nguyen Hoang, Ryuichi Shinjo in Water Resources (2019)

  13. No Access

    Article

    Reoperation within 2 years after lumbar interbody fusion: a multicenter study

    Posterior lumbar interbody fusion (PLIF)/transforaminal lumbar interbody fusion (TLIF) can have complications that require reoperation. The goal of the study was to identify risk factors for reoperation within...

    Kazuyoshi Kobayashi, Kei Ando, Fumihiko Kato, Tokumi Kanemura in European Spine Journal (2018)

  14. Article

    Subduction-related mafic to felsic magmatism in the Malayer–Boroujerd plutonic complex, western Iran

    The Malayer–Boroujerd plutonic complex (MBPC) in western Iran, consists of a portion of a magmatic arc built by the northeast verging subduction of the Neo-Tethys plate beneath the Central Iranian Microcontine...

    Reza Deevsalar, Ryuichi Shinjo, Jean P. Liégeois in Swiss Journal of Geosciences (2018)

  15. No Access

    Article

    Finite element method (FEM) groundwater inflow modeling associated with an unconfined aquifer into the open-pit coalmine of the Phulbari area, NW Bangladesh

    This paper uses a two-dimensional finite element method (FEM) numerical modeling to predict groundwater inflow from an unconfined aquifer into the open-pit coalmine in the Phulbari area of northwest Bangladesh...

    Md. Rafiqul Islam, Ryuichi Shinjo, Mohammed Omar Faruque in Arabian Journal of Geosciences (2016)

  16. No Access

    Article

    Response of Acropora digitifera to ocean acidification: constraints from δ11B, Sr, Mg, and Ba compositions of aragonitic skeletons cultured under variable seawater pH

    The response of Acropora digitifera to ocean acidification is determined using geochemical proxy measurements of the skeletal composition of A. digitifera cultured under a range of pH levels. We show that the che...

    Kentaro Tanaka, Michael Holcomb, Asami Takahashi, Haruko Kurihara in Coral Reefs (2015)

  17. No Access

    Article

    Hyperamylasemia and pancreatitis following posterior spinal surgery

    Postoperative pancreatitis has primarily been reported as a complication of abdominal surgery, but there are some case reports of postoperative pancreatitis after spinal surgery. The objective of this study wa...

    Kazuyoshi Kobayashi, Shiro Imagama, Zenya Ito, Kei Ando in Journal of Orthopaedic Science (2015)

  18. No Access

    Article

    Appropriate timing of surgical intervention for the proximal type of cervical spondylotic amyotrophy

    The purposes of this study were to evaluate the clinical outcome after surgical treatment of patients with the proximal type of cervical spondylotic amyotrophy (CSA) and to explore the appropriate timing for s...

    Ryoji Tauchi, Shiro Imagama, Hidefumi Inoh in European Journal of Orthopaedic Surgery & … (2015)

  19. No Access

    Article

    Mantle source characterization of Sylhet Traps, northeastern India: A petrological and geochemical study

    In this study, mineralogical, geochemical, and isotopic data are presented for the Sylhet Trap at the southern flank of the eastern Shillong Plateau, northeastern India, to determine the magma genesis in relat...

    Md Shofiqul Islam, Daniel Meshesha, Ryuichi Shinjo in Journal of Earth System Science (2014)

  20. No Access

    Article

    Volumetric change in interbody bone graft after posterior lumbar interbody fusion (PLIF): a prospective study

    The purpose of this study is to quantify the change in the volume of the interbody bone graft after the PLIF and monitor the change over time for subsequent analysis.

    Zenya Ito, Shiro Imagama, Tokumi Kanemura, Kotaro Satake in European Spine Journal (2014)

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