Results 1 to 10 of about 312 (135)

Effects of a Whole Plant Extract of Scutellaria rubropunctata var. rubropunctata on Bone Metabolism with Estrogen Receptor Activation [PDF]

Plants, 2022
We screened natural resources for estrogen receptor (ER)-activating and bone metabolism-promoting activities with the aim of finding potential treatments for osteoporosis. A screen of 1531 extracts from Ryukyu Arc plants using a luciferase reporter assay
Misaki Watanabe, Tadahiro Yahagi, Takahiro Shirayama, Katsunori Miyake, Hitoshi Kotani, Takuya Ogawa, Keiichi Matsuzaki   +6 more
doaj   +2 more sources

Anisotropic Permeability Pathways Controlled by Intraslab Stress Heterogeneity in the Philippine Sea Slab Beneath the Ryukyu Arc

Geochemistry, Geophysics, Geosystems
Intermediate‐depth intraslab earthquakes in the Philippine Sea Plate occur at depths of 100–200 km beneath the Ryukyu Arc and are widely interpreted as manifestations of slab dehydration; however, the spatial variability in continuity of the volcanic ...
Makoto Otsubo, Ayumu Miyakawa
doaj   +2 more sources

Potential coupling of microbial methane, nitrogen, and sulphur cycling in the Okinawa Trough cold seep sediments [PDF]

Microbiology Spectrum
The Okinawa Trough (OT) is a back-arc basin with a wide distribution of active cold seep systems. However, our understanding of the metabolic function of microbial communities in the cold seep sediments of the OT remains limited.
Ye Chen, Xiyang Dong, Zhilei Sun, Cuiling Xu, Xilin Zhang, Shuangshuang Qin, Wei Geng, Hong Cao, Bin Zhai, Xuecheng Li, Nengyou Wu   +10 more
doaj   +2 more sources

Middle Miocene forearc alkaline magmatism in Amami-Oshima Island, central Ryukyu Arc: implications for paleoreconstruction of Shikoku Basin

Earth, Planets and Space, 2023
During the middle Miocene, forearc alkaline magmatism occurred in the Outer Zone of Southwest Japan and the northern Ryukyu Arc, resulting in the formation of forearc alkaline basaltic rocks with ocean island basalt (OIB)-like chemical signatures.
Ginta Motohashi, Osamu Ishizuka, Hirokuni Oda, Takashi Sano, Shun Sekimoto, Kohtaro Ujiie   +5 more
doaj   +1 more source

Variations in the crustal structure and strength of plate coupling along the Ryukyu subduction zone

Geoscience Letters, 2023
The Ryukyu trench-arc-back arc system is part of the subduction margins of the Philippine Sea plate. Previous studies have indicated that several geophysical and geological characteristics reveal significant variations (including convergent rate ...
Wen-Bin Doo, Chung-Liang Lo, Yin-Sheng Huang, Wen-Nan Wu, Shiou-Ya Wang   +4 more
doaj   +1 more source

Gravity inversion constrained by OBS receiver function reveals crustal structure in Ryukyu Trench

Frontiers in Earth Science, 2023
The Ryukyu Trench is located in the northern Philippine Sea. The subduction of the Philippine Sea Plate to the Eurasia Plate along the Ryukyu Trench in the NNW direction leads to extremely complex tectonic processes such as subduction, collision ...
Tingwei Yang, Tingwei Yang, Ya Xu, Ya Xu, Ya Xu, Nanqiao Du, Tao Xu, Tao Xu, Danping Cao, Fangzhou Nan, Fangzhou Nan, Fangzhou Nan, Wei Chu, Ce Liang, Tianyao Hao, Tianyao Hao, Tianyao Hao   +16 more
doaj   +1 more source

Okinawa Trough geophysical and topographic modeling by GDAL utilities and GRASS GIS [PDF]

Podzemni Radovi, 2021
This paper presents using GDAL utilities and GRASS GIS for topographic analysis of the raster grids based on GEBCO DEM as NetCDF file at 15 arc-second intervals.
Lemenkova Polina
doaj   +1 more source

Slab Pull Drives IBM Trench Advance Despite the Weakened Philippine Sea Plate

Geophysical Research Letters, 2023
The mechanism behind the significant Izu‐Bonin‐Mariana (IBM) trench advance is still controversial. We conduct slab subduction numerical models that reproduce the spatio‐temporal tectonic evolution of the Philippine Sea region to investigate whether slab
Huizi Jian, Ting Yang, Zhihao Chen, Lingling Ye, Jiashun Hu, Peng Guo   +5 more
doaj   +1 more source

A Decade of Global Navigation Satellite System/Acoustic Measurements of Back-Arc Spreading in the Southwestern Okinawa Trough

Frontiers in Earth Science, 2021
Long-term seafloor geodetic measurements are important for constraining submarine crustal deformation near plate boundaries. Here we present an integrated analysis of a decade of GNSS/acoustic data collected at a site 60 km to the east of northeast ...
Horng-Yue Chen, Ryoya Ikuta, Ya-Ju Hsu, Toshiaki Tsujii, Masataka Ando, Yoko Tu, Takeru Kohmi, Kiyomichi Takemoto, Koto Mizuno, Hsin Tung, Chin-Shang Ku, Cheng-Horng Lin   +11 more
doaj   +1 more source

Distribution of b-value in the central and southern Ryukyu: is the low b-value in the rift-axis of the Okinawa Trough accurate?

Earth, Planets and Space, 2022
Here, I investigated whether the b-value in the rift-axis of the Okinawa Trough, a back-arc basin, is low. The cause of the low b-value in the rift-axis of the Okinawa Trough had previously been interpreted as increased stress by dyke intrusion. However,
Mamoru Nakamura
doaj   +1 more source