Search Results - "Narumi, K."

Historical record of polychlorinated biphenyls in a sediment core from Lake Biwa, Japan: Significance of unintentional emission and weathering signals revealed by full congener-specific analysis by Hoang, Anh Quoc, Aono, Daichi, Watanabe, Isao, Tsugeki, Narumi K., Kuwae, Michinobu, Takahashi, Shin

“…The occurrence of 209 PCB congeners was determined in a sediment core dated between 1930 and 2019 from Lake Biwa, a typical temperate monomictic lake in Japan…”
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Determination of brominated flame retardants including polybrominated diphenyl ethers, pentabromoethylbenzene, hexabromobiphenyl, and decabromodiphenyl ethane in sediment samples: Validation of a rapid and efficient clean-up method and application to a sediment core from Lake Biwa, Japan by Hoang, Anh Quoc, Aono, Daichi, Kawashima, Ayato, Hamada, Noriaki, Falahudin, Dede, Watanabe, Isao, Tsugeki, Narumi K., Kuwae, Michinobu, Takahashi, Shin

“…The development of rapid and efficient analytical method for the determination of legacy and current-use brominated flame retardants (BFRs) has been performed…”
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Latent ion tracks were finally observed in diamond by Amekura, H., Chettah, A., Narumi, K., Chiba, A., Hirano, Y., Yamada, K., Yamamoto, S., Leino, A. A., Djurabekova, F., Nordlund, K., Ishikawa, N., Okubo, N., Saitoh, Y.

“…Injecting high-energy heavy ions in the electronic stopping regime into solids can create cylindrical damage zones called latent ion tracks. Although these…”
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Mechanism of ion track formation in silicon by much lower energy deposition than the formation threshold by Amekura, H, Narumi, K, Chiba, A, Hirano, Y, Yamada, K, Yamamoto, S, Ishikawa, N, Okubo, N, Toulemonde, M, Saitoh, Y

“…Abstract Mechanism of the ion track formation in crystalline silicon (c-Si) is discussed, particularly under 1–9 MeV C 60 ion irradiation. In this energy…”
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C60 ions of 1 MeV are slow but elongate nanoparticles like swift heavy ions of hundreds MeV by Amekura, H., Narumi, K., Chiba, A., Hirano, Y., Yamada, K., Tsuya, D., Yamamoto, S., Okubo, N., Ishikawa, N., Saitoh, Y.

“…This study reports that high fluence fullerene ion (C 60 + ) irradiation of 1–6 MeV, which was made possible by a new-type of high-flux ion source, elongates…”
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Historical changes in the ecosystem condition of a small mountain lake over the past 60 years as revealed by plankton remains and Daphnia ephippial carapaces stored in lake sediments by Ohtsuki, Hajime, Awano, Tamotsu, Tsugeki, Narumi K, Ishida, Seiji, Oda, Hirotaka, Makino, Wataru, Urabe, Jotaro

“…To examine if changes in species composition of a plankton community in the past due to anthropogenic activities can be clarified in lakes without any…”
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Interspecific variation in ephippial size between Daphnia galeata and D. pulicaria in Lake Biwa, Japan by Tsugeki, Narumi K., Honjo, Mie N., Kuwae, Michinobu

“…Daphnia , keystone herbivores in lakes, routinely produce immediately hatching eggs; additionally, they also produce resting eggs enveloped by an ephippial…”
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Ion tracks in silicon formed by much lower energy deposition than the track formation threshold by Amekura, H., Toulemonde, M., Narumi, K., Li, R., Chiba, A., Hirano, Y., Yamada, K., Yamamoto, S., Ishikawa, N., Okubo, N., Saitoh, Y.

“…Damaged regions of cylindrical shapes called ion tracks, typically in nano-meters wide and tens micro-meters long, are formed along the ion trajectories in…”
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Sedimentary records of metal deposition in Japanese alpine lakes for the last 250 years: Recent enrichment of airborne Sb and In in East Asia by KUWAE, Michinobu, TSUGEKI, Narumi K, AGUSA, Tetsuro, TOYODA, Kazuhiro, TANI, Yukinori, UEDA, Shingo, TANABE, Shinsuke, URABE, Jotaro

“…Concentrations of 18 elements, including Sb, In, Sn, and Bi, were measured in sediment cores from two pristine alpine lakes on Mount Hachimantai, northern…”
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C 60 ions of 1 MeV are slow but elongate nanoparticles like swift heavy ions of hundreds MeV by Amekura, H, Narumi, K, Chiba, A, Hirano, Y, Yamada, K, Tsuya, D, Yamamoto, S, Okubo, N, Ishikawa, N, Saitoh, Y

“…This study reports that high fluence fullerene ion (C ) irradiation of 1-6 MeV, which was made possible by a new-type of high-flux ion source, elongates metal…”
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Intratumoural immune cell landscape in germinoma reveals multipotent lineages and exhibits prognostic significance by Takami, H., Fukushima, S., Aoki, K., Satomi, K., Narumi, K., Hama, N., Matsushita, Y., Fukuoka, K., Yamasaki, K., Nakamura, T., Mukasa, A., Saito, N., Suzuki, T., Yanagisawa, T., Nakamura, H., Sugiyama, K., Tamura, K., Maehara, T., Nakada, M., Nonaka, M., Asai, A., Yokogami, K., Takeshima, H., Iuchi, T., Kanemura, Y., Kobayashi, K., Nagane, M., Kurozumi, K., Yoshimoto, K., Matsuda, M., Matsumura, A., Hirose, Y., Tokuyama, T., Kumabe, T., Ueki, K., Narita, Y., Shibui, S., Totoki, Y., Shibata, T., Nakazato, Y., Nishikawa, R., Matsutani, M., Ichimura, K.

“…Aims Alterations in microenvironments are a hallmark of cancer, and these alterations in germinomas are of particular significance. Germinoma, the most common…”
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Type I IFN gene delivery suppresses regulatory T cells within tumors by Hashimoto, H, Ueda, R, Narumi, K, Heike, Y, Yoshida, T, Aoki, K

“…Type I interferon (IFN) is a pleiotropic cytokine regulating the cancer cell death and immune response. IFN-α can, as we have also reported, effectively induce…”
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Human-induced marine degradation in anoxic coastal sediments of Beppu Bay, Japan, as an Anthropocene marker in East Asia by Kuwae, Michinobu, Tsugeki, Narumi K., Amano, Atsuko, Agusa, Tetsuro, Suzuki, Yoshiaki, Tsutsumi, Jun, Leavitt, Peter R., Hirose, Kotaro

“…The timing and magnitude of coastal marine degradation in East Asia during a possible transition from the Holocene to the proposed Anthropocene have still not…”
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Temporal variations in phytoplankton biomass over the past 150 years in the western Seto Inland Sea, Japan by Tsugeki, Narumi K., Kuwae, Michinobu, Tani, Yukinori, Guo, Xinyu, Omori, Koji, Takeoka, Hidetaka

“…We examined fossil pigments in a 210 Pb-dated sediment core to document the temporal variations in phytoplankton biomass over the past 150 years in a…”
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0.12–0.54 MeV C60 ion impacts on a poly(methyl methacrylate) target: Characterization through emission properties of negative secondary ions by Hirata, K., Yamada, K., Chiba, A., Hirano, Y., Narumi, K., Saitoh, Y.

“…The impacts of C60 ions on a poly(methyl methacrylate) target in the energy range of 0.12–0.54 MeV were characterized by analysis of negative secondary ion…”
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Intertidal bare mudflats subsidize subtidal production through outwelling of benthic microalgae by Yoshino, Kenji, Tsugeki, Narumi K., Amano, Yoshimasa, Hayami, Yuichi, Hamaoka, Hideki, Omori, Koji

“…An investigation of food web structures in the northwestern soft-bottom area, including the intertidal and subtidal zones, of inner Ariake Bay, suggests that…”
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Formation of ion tracks in amorphous silicon nitride films with MeV C60 ions by Kitayama, T., Morita, Y., Nakajima, K., Narumi, K., Saitoh, Y., Matsuda, M., Sataka, M., Tsujimoto, M., Isoda, S., Toulemonde, M., Kimura, K.

“…Amorphous silicon nitride (a-SiN) films (thickness 5–100nm) were irradiated with 0.12–5MeV C60, 100MeV Xe, 200MeV Kr, and 200 and 420MeV Au ions. Ion tracks…”
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Sedimentary records of metal deposition in Japanese alpine lakes for the last 250years: Recent enrichment of airborne Sb and In in East Asia by Kuwae, Michinobu, Tsugeki, Narumi K., Agusa, Tetsuro, Toyoda, Kazuhiro, Tani, Yukinori, Ueda, Shingo, Tanabe, Shinsuke, Urabe, Jotaro

“…Concentrations of 18 elements, including Sb, In, Sn, and Bi, were measured in sediment cores from two pristine alpine lakes on Mount Hachimantai, northern…”
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Local heating induced by single MeV C 60 ion impacts by Hayashi, H., Matsuzaki, S., Nakajima, K., Narumi, K., Saitoh, Y., Tsujimoto, M., Toulemonde, M., Kimura, K.

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Surface effect on ion track formation in amorphous Si3N4 films by Morita, Y., Nakajima, K., Suzuki, M., Narumi, K., Saitoh, Y., Ishikawa, N., Hojou, K., Tsujimoto, M., Isoda, S., Kimura, K.

“…Thin films of amorphous Si3N4 (thickness 5–30nm) were irradiated with 360–720keV C602+ ions. Ion tracks were observed using transmission electron microscopy…”
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