Search Results 1-20 of 869

  • Transient-rare Bacterial Taxa Are Assembled Neutrally across Temporal Scales

    Lee Sang-Hoon , Kim Taek-Seung , Park Hee-Deung

    … <p>Despite the importance of microbial communities in ecosystem functions, the mechanisms underlying the assembly of rare taxa over time are poorly understood. …

    Microbes and Environments 36(1), n/a, 2021

    J-STAGE 

  • Functions and structure of roots and their contributions to salinity tolerance in plants

    Karahara Ichirou , Horie Tomoaki

    … <p>Soil salinity is an increasing threat to the productivity of glycophytic crops worldwide. … The root plays vital roles under various stress conditions, including salinity, as well as has diverse functions in non-stress soil environments. …

    Breeding Science, 2021

    J-STAGE 

  • Importance of individual root traits to understand crop root system in agronomic and environmental contexts

    Tajima Ryosuke

    … <p>Resource acquisition, one of the major functions of roots, can contribute to crop growth and mitigating environmental impacts. … The spatio-temporal distribution of roots in the soil in relation to the dynamics of the soil resources is critical in resource acquisition. … The integration of individual root traits in the root system could exhibit crop performance in the various environments via root distribution in the soil. …

    Breeding Science, 2021

    J-STAGE 

  • Review and future perspective of AsiaFlux

    Guirui YU , HIRANO Takashi

    … Researchers of AsiaFlux have made great progress in flux observation, remote-sensing and ecosystem modeling, and made outstanding contribution to quantifying global carbon balance and understanding the functions of Asian terrestrial ecosystems. …

    Journal of Agricultural Meteorology 77(1), 1-1, 2021

    J-STAGE 

  • Studies on the synthesis and degradation of biodegradable plastic  [in Japanese]

    島田 秀昭 , 桑田 康平

    … A biodegradable plastic is a plastic that has the same properties and functions as conventional plastics, and is biodegraded by microorganisms existing in nature after use, and finally decomposed into water and carbon dioxide. … The types of soil that can efficiently decompose the synthetized casein plastic were also investigated. …

    熊本大学教育学部紀要 (69), 191-194, 2020-12-16

    IR 

  • VERTICAL DYNAMIC PROPERTIES OF SUPER HIGH-RISE RESIDENTIAL BUILDINGS BASED ON RECORDED MOTIONS AND DYNAMIC SOIL-STRUCTURE-INTERACTION EFFECTS  [in Japanese]

    TAMURA Ayame , NAGANO Masayuki , TANUMA Takehiko , ODA Satoshi , KASHIMA Toshihide

    … <p>Although Horizontal and rotational dynamic characteristics of super high-rise residential buildings has been studied based on recorded motions during the 2011 Tohoku earthquake, vertical dynamic properties were not fully investigated, which must be strongly affected by the dynamic soil-structure interaction. … Transfer functions of top responses to ground surface are varied due to vertical soil-structure-interaction with strong dependency of dynamic impedance function.</p> …

    AIJ Journal of Technology and Design (63), 484-489, 2020-06

    J-STAGE  AIJ 

  • The change of evaluation of images for walking trail in coastal forest by conservation and management activities : the case of Niji-no-matsubara in Saga Prefecture  [in Japanese]

    岡田 穣 , 矢澤 聖志

    … This is because when comparing the pictures of 2009 when conservation and management activities started and 2018, the evaluation scale showed strong impressions of "like," "comfortable" and "beautiful" in the landscape image evaluation experiment and the image scale showed a strong image of "accessibility" including the images of "bright," "safe," "clean" and "open." As for the landscape structure, "medium shrubs and herbs" decreased and bare ground such as "sandy soil" and "soil surface" increased. …

    専修大学商学研究所報 51(6), 1-24, 2020-01-31

    IR  DOI 

  • Genome-wide responses to shoot nitrate satiety are attenuated by external ammonium in Arabidopsis thaliana

    Hachiya Takushi , Okamoto Yuki , Watanabe Masahiro , Takebayashi Yumiko , Kojima Mikiko , Suzuki Takamasa , Sakakibara Hitoshi

    Soil Science and Plant Nutrition 66(2), 317-327, 2020-01-26

    DOI 

  • DEVELOPMENT OF A SYSTEM FOR THE VERIFICATION OF THE APPLICABILITY OF RECYCLED MATERIALS AS RESOURCES FOR ENVIRONMENTAL IMPROVEMENT  [in Japanese]

    野口 孝俊 , 三戸 勇吾 , 小野寺 克幸 , 溝川 慎一郎 , 大西 晃輝

    海洋開発シンポジウム講演集 45, 6p, 2020

  • Quantitative evaluation of double aspect of the water storage functions of beech forest soils::An experimental study of the Appi Plateau, Iwate Prefecture, Japan  [in Japanese]

    Ohnuki Yasuhiro , Ono Kenji , Yasuda Yukio , Tsurita Tatsuya , Morishita Tomoaki , Yamashita Naoyuki

    <p>森林土壌の保水機能は，利水ダム的な機能である「水持ち」と治水ダム的な機能である「容量」の二面性を有するが，過去にそれらを明確に区分して定量的に評価した研究はほとんどない。筆者らは，従来保水機能が高いと言われてきたブナ林土壌に着目し，岩手県北部の安比高原に位置するブナ林に調査地を設定して，水持ちの指標と考えられる土壌含水率と，容量の主要因子である表層土層厚を多点で測定した。また，土 …

    Japanese Journal of Forest Environment 62(2), 91-100, 2020

    J-STAGE 

  • Requirement of γ-Aminobutyric Acid Chemotaxis for Virulence of <i>Pseudomonas syringae</i> pv. <i>tabaci</i> 6605

    Tumewu Stephany Angelia , Matsui Hidenori , Yamamoto Mikihiro , Noutoshi Yoshiteru , Toyoda Kazuhiro , Ichinose Yuki

    … Recent studies suggested that GABA also functions as an intracellular signaling molecule in plants and in signals mediating interactions between plants and phytopathogenic bacteria. …

    Microbes and Environments 35(4), n/a, 2020

    IR  J-STAGE 

  • INCORPORATING RUPTURE DIRECTIVITY EFFECTS INSIDE SUBFAULTS IN STOCHASTIC GREEN'S FUNCTION METHOD  [in Japanese]

    HAYAKAWA Takashi , OANA Atsuko

    … The correction functions are complex spectra. … The 1D velocity structures with decreasing S-wave velocities due to soil nonlinearity were constructed at the stations. … In a low frequency range, the correction functions were almost 1. … The correction functions were less/more than 1 in a frequency range of 1Hz or higher. … The correction functions were getting larger as rupture directions in subfaults were from backward to forward. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) 85(775), 1145-1155, 2020

    J-STAGE 

  • Verification of watershed-scale deer fence for conservation of ecosystem functions and its practicality for efficient maintenance in a cool-temperate natural forest in Ashiu, central Japan ―Ashiu Biological Conservation (ABC) Project―

    FUKUSHIMA Keitaro , IKEGAWA Rintaro , ISHIHARA Masae , INOUE Mizuki , YAMASAKI Michimasa , SAKAGUCHI Shota , TAKAYANAGI Atsushi , SAKAI Masaru , NAKAGAWA Hikaru , HIRAOKA Marino , YOSHIOKA Kensei

    <p>西日本でも有数の生物多様性を誇る京都大学芦生研究林内のブナ・ミズナラ天然林では，2000年代に入りシカによる過剰採食が原因で急速に下層植生が衰退した．2006年に防鹿柵で囲んだ集水域，2017年に囲んだ集水域，防鹿柵を設置していない対照集水域の3集水域を対象に，植生・渓流水質・細粒土砂の調査を行い，集水域単位の防鹿柵設置の効果と実用性を検証した．スポット的な植物保全用の防鹿柵に比 …

    Annual Report of Pro Natura Foundation Japan 29(0), 1-13, 2020

    J-STAGE 

  • DEVELOPMENT OF A SYSTEM FOR THE VERIFICATION OF THE APPLICABILITY OF RECYCLED MATERIALS AS RESOURCES FOR ENVIRONMENTAL IMPROVEMENT  [in Japanese]

    NOGUCHI Takatoshi , MITO Yugo , ONODERA Katsuyuki , MIZOKAWA Shinichirou , OONISHI Kouki

    <p>　東京湾では，水環境再生を図るためリサイクル材の活用が検討されている。そこで，実海域における干潟や浅場への造成材料に活用するため，安全性と有効性の観点から検証するシステムを開発した．安全性の検証は，全排水毒性システム（WET試験）の考え方を参照し，実験水槽を用いた疑似現場実験より実施した．有効性の検証では，リサイクル資源を敷設した試験区と，天然砂を敷設した対照区の調査結果を基に， …

    Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 76(2), I_875-I_880, 2020

    J-STAGE 

  • Evaluation of soil and water conservation functions  [in Japanese]

    Tamai Koji , Murakami Wataru , Ito Eriko , Nanko Kazuki , Saito Hitoshi , Toda Kenichiro

    <p>森林施業が森林の水土保全機能に及ぼす影響については、従来から様々な研究が行なわれているものの、情報は断片的であり、林齢や樹木密度、構成樹種といった異なる属性を有した森林の水土保全機能を俯瞰的に評価した事例はほとんどない。そこで本報告では、⽔資源供給機能、水質浄化機能、表土保全機能、山腹崩壊防止機能を表すそれぞれの指標として、水資源賦存量、水質浄化機能指数（本報告で提案）、表土流出 …

    The Japanese Forest Society Congress 131(0), 294, 2020

    J-STAGE 

  • Response of soil bacterial community to different fertilization patterns in young oasis farmland

    Rong YANG , Shiyang CHEN

    … Fertilization in farming systems should not only optimize crop yields and soil fertilizer but also maintain soil biodiversity and functions. … In young oasis farmland, knowledge regarding soil bacteria respond to fertilization strategies is very limited. …

    Journal of Agricultural Meteorology 76(3), 140-147, 2020

    J-STAGE 

  • Development of Medicines for Infectious Diseases –Malaria  [in Japanese]

    Kita Kiyoshi

    … Malaria and more than half of the NTDs are parasitic diseases, such as trypanosomiasis and soil-borne helminthiasis. … Therefore, the search for targets specifically present in parasites, and screening for drugs that inhibit their physiological functions, is extremely important. …

    YAKUGAKU ZASSHI 140(7), 887-894, 2020

    IR  J-STAGE 

  • A STUDY ON TENSILE FORCE MANAGEMENT METHOD FOR ADDITIONAL GROUND ANCHOR CONSTRUCTION IMPLEMENTED AS A DETERIORATION COUNTERMEASURE

    FUJIWARA Yu , MURAKAMI Toyokazu , FUKUDA Mutsutoshi , TAKASHIMA Makoto , NAGAKI Hirotaka

    … <p> The anticorrosion functions of ground anchors (hereinafter anchors) have been strengthened after the revision of standards by the former Japanese Society of Soil Mechanics and Foundation Engineering (present Japanese Geotechnical Society) in 1988. …

    Journal of JSCE 8(1), 161-177, 2020

    J-STAGE 

  • Acquisition of Ground Information in Downtown Yangon for Bosai Operation Support System

    Naing Tun , Thinzar Su , Numada Muneyoshi , Yu Khin Than , Meguro Kimiro

    … For damage prediction, major inputs include information on the underlying soils, building construction and associated fragility functions, based on different building types. … Microtremor survey is a useful tool for reviewing underlying soil layer information, as this can significantly affect vulnerability assessments and the identification of potential damages. …

    Journal of Disaster Research 15(3), 377-386, 2020

    J-STAGE 

  • STABILITY EVALUATION OF HIGHWAY EMBANKMENT REINFORCED WITH SPIRAL BLADED DRAIN PIPE REINFORCEMENTS  [in Japanese]

    KASAMA Kiyonobu , HAMASAKI Tomohiro , ITO Yasutaka , FURUKAWA Zentaro , MATSUKATA Kenji

    <p>　本論文では，排水機能を有するスパイラル羽根付き鋼管（以下，SDPRとよぶ）を試験施工した高速道路盛土を対象に，飽和・不飽和浸透流解析を用いて盛土の地下水位変動の再現を行い，降雨・地震時における安全率改善効果を数値解析的に調査し，適切な打設条件を検討した．得られた結論を以下に示す．(1) 比較的透水性の低い盛土では，長さ6mのSDPRを水平間隔3mで打設することで，無補強の場合と …

    Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) 76(1), 99-109, 2020

    J-STAGE 

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