Search Results 1-20 of 1761

  • Controlling Production Regions of Ca and Mg Carbonates Obtained by CO₂ Fine Bubble Injection into Concentrated Brine

    松本 真和 , 和田 善成 , 高島 志和 , 木村 太一 , 亀井 真之介 , 正岡 功士 , 日秋 俊彦

    日本海水学会誌 = Bulletin of the Society of Sea Water Science, Japan 74(1), 36-43, 2020-02

  • Changes in surface properties of dental alloys with atmospheric plasma irradiation

    NAMURA Yasuhiro , UCHIDA Yasuki , SATO Ryoichi , SHIMIZU Noriyoshi , MOTOYOSHI Mitsuru , TSUTSUMI Yusuke , HANAWA Takao , YONEYAMA Takayuki

    … Gold, titanium and stainless-steel alloy samples were ground with #800 grit SiC waterproof paper and nitrogen gas atmospheric plasma irradiation was conducted. … Reactions with oxygen in the air were promoted on the clean surfaces with exposed reactive elements.</p> …

    Dental Materials Journal 39(3), 375-380, 2020

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  • Sterilization of <I>Pythium aphanidermatum</I> Zoospores Using Surface Discharge Plasma in Solution  [in Japanese]

    HIRAHARA Daichi , SAKAMOTO Genki , YASUI Shinji , KAGEYAMA Koji

    … The sterilization effect was compared with those of other physicochemical changes that accompany plasma irradiation such as gas spray, plasma emission, temperature, and H<SUB>2</SUB>O<SUB>2</SUB> … These results suggest that reactive species such as OH radicals generated using plasma irradiation contribute to the observed sterilization.</p> …

    Shokubutsu Kankyo Kogaku 32(2), 115-121, 2020

    J-STAGE 

  • Evaluation of Concentrated Seawater Discharge from the Salt Manufacturing Process for the Crystallization of CaMg(CO<sub>3</sub>)<sub>2</sub> Using the CO<sub>2</sub> Fine Bubble Technique

    Matsumoto Masakazu , Wada Yoshinari , Tsuchiya Yuko , Kamei Shinnosuke , Masaoka Koji , Hiaki Toshihiko

    … The synthesis of carbonate by reactive crystallization between the dissolved Ca<sup>2+</sup> … Therefore, the fine bubble formation technique, which generates regions of high ion concentrations near the minute gas–liquid interfaces of the bubbles, was applied in the reactive crystallization of CaMg(CO<sub>3</sub>)<sub>2</sub>. … with a high Mg/Ca ratio during the reactive crystallization with CO<sub>2</sub> …

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 53(5), 190-197, 2020

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  • Hydrogen gas inhalation alleviates oxidative stress in patients with post-cardiac arrest syndrome

    Tamura Tomoyoshi , Suzuki Masaru , Hayashida Kei , Kobayashi Yosuke , Yoshizawa Joe , Shibusawa Takayuki , Sano Motoaki , Hori Shingo , Sasaki Junichi

    … Hydrogen gas inhalation (2% hydrogen with titrated oxygen) was initiated upon admission for 18 h. … Blood hydrogen concentrations, plasma and urine oxidative stress markers (derivatives of reactive oxygen metabolites, biological antioxidant potential, 8-hydroxy-2'-deoxyguanosine, <i>N</i><sup>ɛ</sup>-hexanoyl-lysine, lipid hydroperoxide), and cytokines (interleukin-6 and tumor necrosis factor-α) were measured before and 3, 9, 18, and 24 h after hydrogen gas inhalation. …

    Journal of Clinical Biochemistry and Nutrition, 2020

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  • Rapid synthesis of thermoelectric YB<sub>22</sub>C<sub>2</sub>N via spark plasma sintering with gas/solid reaction technology

    SON Hyoung-Won , SAUERSCHNIG Philipp , BERTHEBAUD David , MORI Takao

    … <p>Dense YB<sub>22</sub>C<sub>2</sub>N samples were directly synthesized from powder mixtures via reactive spark plasma sintering. … The gas/solid reaction step was applied to introduce nitrogen into the mixture during heating. … The sample reactively sintered at 1700 °C for 10 min after the gas/solid reaction step at 1200 °C for 30 min consisted of YB<sub>22</sub>C<sub>2</sub>N with small amounts of secondary phases. …

    Journal of the Ceramic Society of Japan 128(4), 181-185, 2020

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  • Unstable behavior of hydrogen-air lean premixed flames (Effects of unburned-gas temperature, heat loss and scale)  [in Japanese]

    KADOWAKI Satoshi , UCHIYAMA Tsutomu , KATSUMI Toshiyuki , Aung Thwe Thwe , KOBAYASHI Hideaki

    … <p>Unstable behavior of hydrogen-air lean premixed flames was studied by numerical calculations of two-dimensional unsteady reactive flow to clarify the effects of unburned-gas temperature, heat loss and scale. … We adopted the numerical model containing the detailed hydrogen-oxygen combustion with 17 elementary reactions of 8 reactive species and a nitrogen diluent, compressibility, viscosity, heat conduction, molecular diffusion, and heat loss of Newtonian type. …

    Transactions of the JSME (in Japanese) 86(883), 19-00401-19-00401, 2020

    J-STAGE 

  • Prevention of the progression of atherosclerosis and aging through nitric oxide (NO)  [in Japanese]

    Hayashi Toshio

    … NO was a widely noted gas with diverse functions, having arginine (L-Arg) as a substrate for the NO synthase (NOS). … In recent years, the anti-arteriosclerosis and anti-cell aging effects of the reactive substance citrulline (L-Cit) have been studied. …

    Folia Pharmacologica Japonica 155(2), 62-68, 2020

    J-STAGE  Ichushi Web 

  • Synthesis of Diphenylphosphine Oxide Derivative and Its Flame Retardant Application in Epoxy Resin

    Tian Xiujuan , Yin Qingqing , Wang Zhongwei

    … <p>A type of reactive phosphorus based flame retardant, hydroxy(4-hydroxyphenyl)methyl)diphenylphosphine oxide (DPO-H), was synthesized and characterized by Fourier Transform Infrared (FTIR) and Nuclear Magnetic Resonance (NMR) spectroscopies. … 4,4′-Diaminodiphenylsulfone (DDS) was used as the curing agent and DPO-H was used as the reactive flame retardant and co-curing to prepare the flame-retardant epoxy resins with different P contents. …

    Journal of Photopolymer Science and Technology 32(6), 769-778, 2020

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  • Endoscopic Hemostasis in Porcine Gastrointestinal Tract Using CO2 Low-Temperature Plasma Jet

    Kurosawa Manabu , Takamatsu Toshihiro , Kawano Hiroaki , Hayashi Yuta , Miyahara Hidekazu , Ota Syosaku , Okino Akitoshi , Yoshida Masaru

    … Materials and methods: On investigating the basic characteristics of the developed plasma jet, the electron densities, gas temperatures, and reactive species were measured by emission spectroscopy and thermocouple. … Results: The measurement of emission spectroscopy, power, and electron density of various gas plasmas suggested that a high-density (1014 cm−3) LTP of CO2 was generated by the LTP jet, and the gas temperature was 41.5°C at 3 mm from the outlet of the LTP jet. …

    Journal of Surgical Research (234), 334-342, 2019-02

    IR 

  • Molecular mechanisms of non-thermal plasma-induced effects in cancer cells

    Tanaka Hiromasa , Mizuno Masaaki , Ishikawa Kenji , Toyokuni Shinya , Kajiyama Hiroaki , Kikkawa Fumitaka , Hori Masaru

    … Plasma is the fourth state of matter with higher energy than gas; … Reactive oxygen and nitrogen species play key roles in NTP-induced effects; …

    Biological Chemistry 400(1), 87-91, 2019-01

    IR 

  • Fuel Production Using a Cathode-supported Honeycomb Solid Oxide Electrolysis Cell  [in Japanese]

    IWANAGA Yoshihiro , NAKAJIMA Hironori , ITO Kohei

    … <p>In recent years, Power to Gas technology converting electric power from renewable energy such as solar and wind powers to fuel for energy storage and transport has attracted attention. … We have developed a honeycomb electrolytic cell with a larger reactive area per unit volume than conventional flat and tubular types. …

    The Proceedings of Conference of Kyushu Branch 2019.72(0), B45, 2019

    J-STAGE 

  • High-Voltage and Plasma Applications for Agriculture, Fishery and Food Processing  [in Japanese]

    TAKAKI Koichi , TAKAHASHI Katsuyuki

    … Types of pulsed power that also have biological effects are caused with gas and water discharges which include reactive species such as ROS and RNS. …

    JAPANESE JOURNAL OF MULTIPHASE FLOW 33(4), 390-396, 2019

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  • Unexpected Aldehyde Generation in the Exhaust Gas at Waste Incineration Facilities

    CHU Xue , FUSE Yasuro , SASAKI Takato , AIZAWA Ichiro , OGUCHI Masahiro , MIYAKE Yuichi

    … However, residual trace organic substances can react with the highly reactive slaked lime. … This study investigates the dynamics of organic substances generated in the bag filter when slaked lime is used in the exhaust gas treatment process. … The mechanism of aldehyde generation was clarified using head space gas chromatography mass spectrometer (HS-GC/MS). …

    Analytical Sciences 35(12), 1347-1352, 2019

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  • Singlet oxygen generated by a new nonthermal atmospheric pressure air plasma device exerts a bactericidal effect on oral pathogens

    Hirano Yoriyuki , Hayashi Makoto , Tamura Muneaki , Yoshino Fumihiko , Yoshida Ayaka , Masubuchi Mitsuaki , Imai Kenichi , Ogiso Bunnai

    … Non-thermal atmospheric pressure plasma (NTAP), generated at atmospheric pressure and room temperature, incorporates several molecules, including reactive oxygen species, that can inactivate various bacteria including oral pathogens. … Use of noble gases can enhance the bactericidal efficacy of NTAP, but this requires additional gas supply equipment. … Therefore, a new NTAP device that employs ambient air as the working gas was developed. …

    Journal of Oral Science 61(4), 521-525, 2019

    J-STAGE 

  • Carbonation treatment of municipal solid waste incineration residues using Exhaust gas and CO<sub>2</sub> separated and recovered from a incineration plant  [in Japanese]

    Kubota Hiroshi , Shigeizumi Koga , Nagayama Yosuke , Fujikawa Takuro , Koga Chikashi , Sato Kenichi , Sakanakura Hirofumi , Fujita Daigo

    … <p>Carbonation treatment of incineration residue (Bottom ash(BA) and Fly ash(FA)) was performed using exhaust gas and CO2 separated and recovered from Saga city's incineration plant in order to develop carbonation technology by exhaust gas from incineration plants. … We investigated the influence of the difference in supply gas on pH and Pb concentration in the eluate. …

    Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management 30(0), 363, 2019

    J-STAGE 

  • Development of high reactive slaked lime suppressing elution of organic component  [in Japanese]

    Morikawa Tetsuya , Sakamoto Hiroshi

    <p>ごみ焼却施設から発生する酸性ガスの除去には、比表面積等を増大させ酸性ガス除去性能を向上した高反応消石灰が用いられることが多くなってきている。高反応消石灰はJIS特号消石灰に比べて使用量が少なくなり、排ガス処理コストの低減や飛灰発生量の減少といったメリットがある。一方で、最終処分場において飛灰からの有機成分溶出が問題となっている。その主たる要因は重金属溶出抑制のために添加される有機 …

    Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management 30(0), 329, 2019

    J-STAGE 

  • Small Plasma Space with a Small Plasma Source and Its Advantage in Minimal Fab

    Tanaka Hiroyuki , Khumpuang Sommawan , Hara Shiro

    … <p>We have developed an inductively-coupled plasma-reactive ion etching system (ICP-RIE) as a human-size tool of Minimal Fab for processing a half-inch wafer. …

    Journal of Photopolymer Science and Technology 32(5), 747-752, 2019

    J-STAGE 

  • Formation of negative ions and resputtering of depositing thin films in Mg-CF<sub>4</sub> direct current reactive sputtering  [in Japanese]

    Kusano Eiji

    … direct current reactive sputtering have been investigated by using Langmuir probe measurements. … concentration in the discharge gas. …

    Abstract book of Annual Meeting of the Japan Society of Vacuum and Surface Science 2019(0), 3Ep12, 2019

    J-STAGE 

  • Comparison of etching rate for reactive gases in field-assisted chemical etching  [in Japanese]

    Oyaizu Eiji , Esaki Taira , Nagai Shigekazu , Iwata Tatsuo , Hata Koichi

    … <p>Field-assisted chemical etching is a technique to fabricate a nano-protrusion structure at the apex of field electron and ion emitters by repeating the chemical reaction and the field evaporation under reactive gas such as oxygen and nitrogen. … In this presentation, we discuss the difference of reaction products and its evaporation field strength for each reactive gas by in-situ atom probe analysis.</p> …

    Abstract book of Annual Meeting of the Japan Society of Vacuum and Surface Science 2019(0), 2P03, 2019

    J-STAGE 

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