Search Results 1-20 of 6897

  • High-throughput gas separation by flexible metal–organic frameworks with fast gating and thermal management capabilities

    Hiraide Shotaro , Sakanaka Yuta , Kajiro Hiroshi , Kawaguchi Shogo , Miyahara Minoru T. , Tanaka Hideki

    … These two characteristics are suitable for developing a pressure vacuum swing adsorption (PVSA) system with rapid operations. … A combined experimental and theoretical study reveals that ELM-11 enables the high-throughput separation of CO2 from a CO2/CH4 gas mixture through adiabatic operations, which are extreme conditions in rapid pressure vacuum swing adsorption. … Furthermore, the superiority of our proposed system over conventional systems is demonstrated. …

    Nature Communications (11), 2020-08-03

    IR 

  • Temperature relaxation in binary hard-sphere mixture system: Molecular dynamics and kinetic theory study

    Tanaka Shigenori , Shimamura Kohei

    Journal of Chemical Physics 153(3), 034114, 2020-07-21

    IR 

  • Ultracold collisions in the Yb-Li mixture system

    Schäfer Florian , Konishi Hideki , Bouscal Adrien , Yagami Tomoya , Frye D. Matthew , Hutson M. Jeremy , Takahashi Yoshiro

    … We report our experimental results on the collisional physics between non-S-state atoms (ytterbium (Yb), effectively a two-electron system, in the metastable ³P₂ state) and S-state atoms (lithium (Li), an alkali metal, in the ground state). … At low magnetic fields, by measuring inelastic interspecies collisional losses in the double quantum degenerate mixture we reveal the strong dependence of the inelastic losses on the internal spin states of both species and suppressed losses in stretched state configurations. …

    Journal of Physics: Conference Series(ICPEAC2019) 1412(2020), 2020-06-11

    IR 

  • Effective bifidogenic growth factors cyclo-Val-Leu and cyclo-Val-Ile produced by Bacillus subtilis C-3102 in the human colonic microbiota model

    Hatanaka Misaki , Morita Hiroto , Aoyagi Yumi , Sasaki Kengo , Sasaki Daisuke , Kondo Akihiko , Nakamura Teppei

    … Moreover, supplementation with a mixture of these six cyclic dipeptides significantly increased the abundance of microorganisms related to the genus Bifidobacterium in a human colonic microbiota model culture system, although supplementation with a single type of dipeptide had no effect. …

    Scientific Reports 10(1), 7591, 2020-05-05

    IR 

  • Alteration and Stability of Complex Macromolecular Amino Acid Precursors in Hydrothermal Environments

    Elmasry Walaa , Kebukawa Yoko , Kaneko Takeo , Obayashi Yumiko , Fukuda Hitoshi , Oguri Yoshiyuki , Kobayashi Kensei

    … The early Solar System comprised a broad area of abiotically created organic compounds, including interstellar organics which were integrated into planetesimals and parent bodies of meteorites, and eventually delivered to the early Earth. … In this study, we simulated interstellar complex organic compounds synthesized by proton irradiation of a gas mixture of CO, NH3, and H2O, which are known to release amino acids after acid hydrolysis on the basis of Kobayashi et al. …

    Origins of life and evolution of the biosphere 50(1-2), 15-33, 2020-04-20

    IR 

  • Performance of Mixture-Ratio-Controlled Hybrid Rockets for Nominal Fuel Regression

    Ozawa Kohei , Shimada Toru

    … However, the performance of the O/F-controlled sounding rockets is essentially the same as the O/F-uncontrolled type under the median regression behavior: especially when considering the slight increases in the mass and complexity of the oxidizer feed system needed for O/F control. …

    Journal of Propulsion and Power, 2020-03-03

    IR 

  • Electrochemical behavior of tungsten carbide-cobalt alloy using molten hydroxide as electrolyte under low temperature

    Kamimoto Yuki , Kasuga Ren , Takeshita Kyohei , Hagio Takeshi , Kuroda Kensuke , Ichino Ryoichi , Deevanhxay Phengxay

    … In this study, we investigated tungsten leaching at a lower temperature by using a eutectic mixture of 51.5 mol% NaOH and 49.5 mol% potassium hydroxide (KOH) as the electrolyte. … Tungsten was leached at 623 K in this system. …

    Journal of Material Cycles and Waste Management 22(2), 348-353, 2020-03

    IR 

  • Electrocatalytic Activity of Heteroatom-Doped Graphene for Oxidation of Hydroquinones

    HARA Masanori , JOSHI Prerna , BADAM Rajashekar , HUANG Hsin-Hui , YOSHIMURA Masamichi

    … N-rGO and B-rGO were prepared from a mixture of graphene oxide (GO) and urea or boron trioxide by pyrolysis method. … The electrochemical analysis of the prepared materials by rotating disk electrode system reveals high activity of B-rGO, 15 and 85 mV lower overvoltage compared with rGO at the half-wave potential of diffusion-limited current, for the electro-oxidation of hydroquinone and methyl-hydroquinone, respectively, because of its electron-accepting nature. …

    Electrochemistry 88(5), 407-412, 2020

    J-STAGE 

  • Vietnamese Forest Resource Strategies: Shift in Raw Materials to Plantation Forest Timber  [in Japanese]

    IWANAGA Seiji

    ベトナムの資源政策は,東南アジア諸国の中では最も包括的に取り組まれていると言える。本稿では,その実施過程を明らかにするとともに,それら資源政策を実現に導いた森林資源戦略の背景を考察した。そのために,ベトナムの資源政策を,森林の動態と保護,木材加工産業における原料消費,木材の合法性と持続性という3つの視点から分析した。その結果,人工林資源を拡大した上で天然林伐採禁止や丸太輸出禁止を行ったという政策実 …

    Journal of Forest Economics 66(1), 35-44, 2020

    J-STAGE 

  • Triple-Wavelength Photoacoustic gas detection for a smart endoscopy  [in Japanese]

    Wadamori Naoki

    … For this Purpose, a miniature photoacoustic system was developed to perform gas sampling using a smart endoscope. … An array of modulated laser diodes and its controller were developed and coupled via an optical fiber bundle a photoacoustic sensor head, because interferences of other compounds can be reduced by using several laser wavelengths.A mixture of CO2 and N2 gases was measured using a triple-wavelength optical source (450, 1420, 1540 nm) to detect the various compounds. …

    Transactions of Japanese Society for Medical and Biological Engineering Annual58(Abstract), 435-435, 2020

    J-STAGE 

  • Solidification Behavior for Direct Contact between Sugar-alcohol Latent-heat Storage Materials and Heat Transfer Oil  [in Japanese]

    Horibe Akihiko , Yamada Yutaka

    … <p>The purpose of this study is developing a latent heat storage system that uses waste heat from factories in the temperature range 100–200ºC as a heat source. … Mannitol and a mixture of mannitol and erythritol, which are sugar alcohols, were used as phase change materials (PCMs). … The initial solidification shape of the mannitol–erythritol mixture (70% mannitol and 30% erythritol) is different from that of the mannitol. …

    Tetsu-to-Hagane 106(8), 518-526, 2020

    J-STAGE 

  • 3-21 Thermal Distribution Analysis of Microwave-Assisted Woody Biomass Degradation in a Copper Oxide-Peroxide Reaction System

    QU Chen , KASHIMURA Keiichiro , MITANI Tomohiko , SHINOHA Naoki , WATANABE Takashi

    … Herein, the thermal distribution in this reaction system was analyzed to clarify the heating behavior of microwave heating. … The permittivity and loss factors of reaction mixture (2M sodium hydroxide (NaOH) solution, woody powders, and copper oxide powder), NaOH solution, copper oxide powder were measured, respectively. …

    Proceedings of the Annual Conference of The Japan Institute of Energy 29(0), 78-79, 2020

    J-STAGE 

  • 2-16 The Effect of Mixture of Metals on the Nucleation of Tetra-n-butyl Ammonium Salt Hydrate  [in Japanese]

    KOGA Yuki , SUZUKI Rikuto , MORIMOTO Takashi , TAKEYA Satoshi , INADA Takaaki , KUMANO Hiroyuki

    … <p>Tetra-n-butylammonium bromide (TBAB) hydrate and tetra-n-butylammonium chloride (TBAC) hydrate are used as a thermal energy storage media for air-conditioning system. …

    Proceedings of the Annual Conference of The Japan Institute of Energy 29(0), 40-41, 2020

    J-STAGE 

  • Production of genome-edited mice by visualization of nucleases introduced into the embryos using electroporation

    WAKE Yui , KANEKO Takehito

    … Recently, a new electroporation technique (TAKE: Technique for animal knockout system by electroporation) was developed to produce genome-edited animals by introducing nucleases into intact embryos using electroporation instead of the microinjection method. … The embryos were transfected with Cas9 protein and fluorescent labeled dual guide RNA (mixture with crRNA and tracrRNA with ATTO-550) targeted tyrosinase gene by the TAKE method. …

    Journal of Reproduction and Development, 2020

    J-STAGE 

  • Pressure-drop Modelling in the Softening and Melting Test for Ferrous Burden

    Mitra Subhasish , Liu Xinliang , Honeyands Tom , Evans Geoffrey , O'Dea Damien , Zulli Paul

    … Due to complex phase interactions coupled with chemical reactions at an elevated temperature range (~973 to 1873 K), the flow dynamics in the test system are quite complex. … This study systematically investigates the contraction behaviour and associated pressure drop in a SM test bed for sinter, lump (NBLL, Newman Blend Lump) and a mixture of these two types of ore (21 wt% NBLL + 79 wt% sinter). …

    ISIJ International 60(7), 1416-1426, 2020

    J-STAGE 

  • Influence of Atmosphere and Basicity on Softening and Melting Behaviors of the CaO–FeO–SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–MgO System

    Ueda Shigeru , Miki Takahiro , Kim Sun-Joong , Gao Xu , Nogami Hiroshi , Kitamura Shin-ya

    … <p>In this study, we analyze the softening and melting behaviors of the CaO–FeO–SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–MgO system for improving gas permeability in a blast furnace. … mixture; …

    ISIJ International 60(7), 1380-1388, 2020

    J-STAGE 

  • Interface and Adhesion of Composite:3. Structure of Silane Coupling Agent at the Interface in Composite  [in Japanese]

    NAKAMURA Yoshinobu , HIRAI Tomoyasu , FUJII Syuji

    … The 300% modulus was higher in the dialkoxy than in the trialkoxy system. … The entanglement of SCA and IR chains tends to occur in the dialkoxy system. … The loose network structure is formed by the mixture of dialkoxy and smaller amount of trialkoxy types. … In order to reinforce the IR composite with calcium carbonate particles, the surface treatment with a mixture of amino- and mercapto-functional SCAs was useful. …

    NIPPON GOMU KYOKAISHI 93(5), 166-169, 2020

    J-STAGE 

  • A Study of an HCCI Engine with Multi-Stage Combustion System (Second Report):-Effects of Small Chamber Volume Ratio on Combustion Properties-  [in Japanese]

    Nomura Takuya , Wada Jun-ichi , Sasaki Hiroshi

    HCCI燃焼の過大な圧力上昇率を低減し,運転範囲を拡大する方法として燃焼室を空間的に大小二つに分割し二段HCCI燃焼を実現した.本研究ではこの二段のHCCI燃焼に大きな影響を及ぼし,設計要素として最も重要と考えられる小燃焼室容積比を変化させたときの機関性能,排気特性,燃焼特性について追究した.

    Transactions of Society of Automotive Engineers of Japan 51(4), 583-588, 2020

    J-STAGE 

  • A Study of an HCCI Engine with Multi-Stage Combustion System (First Report):-Multi-stage HCCI Combustion by means of a Divided Combustion Chamber-  [in Japanese]

    Nomura Takuya , Ishii Yuichiro , Sasaki Hiroshi

    燃焼室を小燃焼室,大燃焼室に分割し,小燃焼室で先に着火・燃焼を行い,引き続き大燃焼室で燃焼を行うことにより二段の予混合圧縮着火燃焼が実現できる.これにより最大圧力上昇率の抑制,燃焼期間の延長が可能となり,燃焼範囲が拡大する.本稿では本燃焼方式における機関性能,排気特性,燃焼特性について報告する.

    Transactions of Society of Automotive Engineers of Japan 51(4), 576-582, 2020

    J-STAGE 

  • Adaptive Gaussian Mixture Model-Based Statistical Feature Extraction for Computer-Aided Diagnosis of Micro-Calcification Clusters in Mammograms

    ZHANG Zhang , ZHANG Xiaoyong , ICHIJI Kei , TAKANE Yumi , YANAGAKI Satoru , KAWASUMI Yusuke , ISHIBASHI Tadashi , HOMMA Noriyasu

    … spatial distribution and propose an adaptive Gaussian mixture model-based method to extract the statistical features of the spatial distribution in this study. …

    SICE Journal of Control, Measurement, and System Integration 13(4), 183-190, 2020

    J-STAGE 

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