研究者業績

石澤 秀紘

イシザワ ヒデヒロ  (Hidehiro Ishizawa)

基本情報

所属
兵庫県立大学 大学院 工学研究科 助教
学位
博士(工学)(2020年3月 大阪大学)

連絡先
ishizawahidehirogmail.com
研究者番号
90888265
ORCID ID
 https://orcid.org/0000-0003-0026-6039
J-GLOBAL ID
202001007668662740
researchmap会員ID
R000003339

受賞

 3

論文

 24
  • Hidehiro Ishizawa, Minami Tada, Yosuke Tashiro, Masashi Kuroda, Daisuke Inoue, Hideo Dohra, Hiroyuki Futamata, Michihiko Ike
    Microbiology Resource Announcements 2024年3月  査読有り筆頭著者責任著者
    ABSTRACT We report the complete genome sequences of six bacterial strains isolated from a floating macrophyte, duckweed. These six strains, representing the six dominant families of the natural duckweed microbiome, establish a simple model ecosystem when inoculated onto sterilized duckweed. Their genomes would provide insights into community assembly in plant microbiome.
  • Hidehiro Ishizawa, Yosuke Tashiro, Daisuke Inoue, Michihiko Ike, Hiroyuki Futamata
    Proceedings of the National Academy of Sciences 121(7) 2024年2月5日  査読有り筆頭著者責任著者
    Understanding the assembly of multispecies microbial communities represents a significant challenge in ecology and has wide applications in agriculture, wastewater treatment, and human healthcare domains. Traditionally, studies on the microbial community assembly focused on analyzing pairwise relationships among species; however, neglecting higher-order interactions, i.e., the change of pairwise relationships in the community context, may lead to substantial deviation from reality. Herein, we have proposed a simple framework that incorporates higher-order interactions into a bottom–up prediction of the microbial community assembly and examined its accuracy using a seven-member synthetic bacterial community on a host plant, duckweed. Although the synthetic community exhibited emergent properties that cannot be predicted from pairwise coculturing results, our results demonstrated that incorporating information from three-member combinations allows the acceptable prediction of the community structure and actual interaction forces within it. This reflects that the occurrence of higher-order effects follows consistent patterns, which can be predicted even from trio combinations, the smallest unit of higher-order interactions. These results highlight the possibility of predicting, explaining, and understanding the microbial community structure from the bottom–up by learning interspecies interactions from simple beyond-pairwise combinations.
  • 奥田萌莉, 石澤秀紘, 大島裕明
    電子情報通信学会論文誌D 2024年1月  査読有り
  • Kanta Yamamoto, Yuichi Utsumi, Ikuya Sakurai, Ikuo Okada, Kenji Hanada, Hidehiro Ishizawa, Masahiro Takeo, Taki Watanabe, Sho Amano, Satoru Suzuki, Koji Sumitomo, Akinobu Yamaguchi
    Journal of Vacuum Science & Technology B 41(6) 2023年10月11日  査読有り
    We have completed a system that can achieve both deep x-ray lithography and submicron x-ray lithography with a single beamline by introducing the combination of x-ray plane and cylindrical mirrors. This x-ray lithography system can provide a large-scale microfabrication processing with 210 × 300 mm2 (A4 size). To exploit multiscale lithography, the beamline has a beam transport vacuum duct with a two-stage stacked structure and a 5-axis stage. This two-stage stacked structure allows us to fabricate both micron scale structures with high aspect ratios and submicron scale structures using the same beamline. In addition, x-ray imaging and computer tomography (CT) system are connected to the x-ray lithography system for nondestructive inspection and evaluation of the fabricated microstructures. The x-ray imaging system constructed this study has a relatively low energy range of x-ray energy in the beamline, which is in the range of 2–15 keV or less. Therefore, relatively good absorption contrast can be obtained for plastic materials, biomaterials, and the like. Since nondestructive imaging of the processed shape by x-ray lithography is possible, it is a very useful system in processing and evaluation can be performed simultaneously. This system also enables us to obtain the live images with keeping the creature alive in liquid using an indirect x-ray imaging system which converts x-ray images to visible light images through the fluorescent plate.
  • Hidehiro Ishizawa, Yukiko Kaji, Yuki Shimizu, Masashi Kuroda, Daisuke Inoue, Ayaka Makino, Ryosuke Nakai, Hideyuki Tamaki, Masaaki Morikawa, Michihiko Ike
    Journal of Water and Environment Technology 21(1) 49-58 2023年2月  査読有り筆頭著者

MISC

 6
  • 石澤秀紘, 田代陽介, 井上大介, 池道彦, 二又裕之
    兵庫県立大学プレスリリース 2024年2月  
  • 奥田萌莉, 石澤秀紘, 大島裕明
    画像ラボ2024年2月号 2024年1月  招待有り
  • Hidehiro Ishizawa, Yosuke Tashiro, Daisuke Inoue, Michihiko Ike, Hiroyuki Futamata
    bioRxiv 2023年7月6日  筆頭著者責任著者
    Abstract The way to deal with higher-order effects (i.e., modification of pairwise interactions by third-party species) has been a major consideration in community ecology. Ignoring these effects is not in line with reality, yet fully considering them make the situation overly complex. Here, we propose a simple framework incorporating higher-order effects into a bottom-up community modeling, and assessed its validity using a seven-member synthetic bacterial community on a host plant, duckweed. Our findings revealed that actual interspecies interactions in community could not be predicted from pairwise co-culturing results; however, using information from trio combinations allowed for acceptable prediction. In addition, inclusion of four-, five-, and six-member combinations did not markedly enhance the prediction accuracy from trio-based prediction, suggesting that trio combinations, the smallest unit of higher-order effects, provide a reasonable baseline to unravel complex interaction networks. Building on this finding, we developed a prediction rule to estimate the structure of 4 – 7 member communities based on information from ≤ 3-member combinations, which yielded significantly better accuracy (relative mean square percentage errors of 22.7% – 61.2%) than pairwise-based model (53.5% – 185.2%). This highlights the possibility of establishing a quantitative link between the interspecies interactions and community structure, by observing beyond-pairwise combinations.
  • 石澤秀紘, 黒田真史, 井上大介, 池道彦
    大阪大学超高圧電子顕微鏡センター年報 49 2020年  招待有り
  • Hidehiro Ishizawa, Masashi Kuroda, Masaaki Morikawa, Michihiko Ike
    Duckweed Forum 6(1) 22-23 2018年1月  招待有り筆頭著者

書籍等出版物

 1

共同研究・競争的資金等の研究課題

 6