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Evaluation of temperature dependent vortex pinning properties in strongly pinned YBa_(2)Cu_(3)o_(7-δ)thin films with Y_(2)BaCuo_(5)nanoinclusions

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Superconductivity 2024年第1期9卷 95-105页

作者： Alok K.Jha Kaname Matsumoto Tomoya horide Shrikant Saini Ataru Ichinose Paolo Mele Yutaka Yoshida satoshi Awaji Department of Materials Science and Engineering Kyushu Institute of TechnologyTobata-kuKitakyushu 804-8550Japan Department of Mechanical and Control Engineering Kyushu Institute of TechnologyTobata-kuKitakyushu 804-8550Japan Central Research Institute of Electrical Power Industry YokosukaKanagawa 240-0196Japan College of Engineering-Innovative Global Program Shibaura Institute of TechnologyMinuma-kuSaitama 337-8570Japan Department of Energy Engineering and Science Nagoya UniversityChikusa-kuNagoya 464-8603Japan Institute for Materials Research Tohoku UniversityAoba-kuSendai 980-8577Japan

The pinning of quantized magnetic vortices in superconducting YBa_(2)Cu_(3)o_(7-δ)(YBCo or Y123)thin films with Y_(2)BaCuo_(5)(Y211)nanoinclusions have been investigated over wide temperature range(4.2-77 K).The concentration of Y211 nanoinclusions has been systematically varied inside YBCo thin films prepared by laser ablation technique using surface modified target *** pinning force density values(Fp∼0.5 TNm^(−3)at 4.2 K,9 T)have been observed for the YBCo film with moderate concentration of Y211 nanoinclusions(3.6 area%on ablation target).In addition,uniform enhancement in critical current density(J_(c))was observed in the angular dependent J_(c)measurement of YBCo+Y211 nanocomposite films.Y211 nanoinclusions have been found to be very efficient in pinning the quantized vortices thereby enhancing the in‐field J_(c)values over a wide range of *** the concentration of Y211 secondary phase into Y123 film matrix results into agglomeration of Y211 phase and observed as increased Y211 nanoparticle *** larger secondary phase nanoparticles are not as efficient pinning centers at lower temperatures as they are at higher temperatures due to substantial reduction of the coherence length at lower *** of the temperature dependence of J_(c)for YBCo+Y211 nanocomposite films has been conducted and possible vortex pinning mechanism in these nanocomposite films has been discussed.

关键词： YBCo thin film Critical current Vortex pinning Nanoscale APCs

Development of the reactive force field and silicon dry/wet oxidation process modeling

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npj Computational Materials 2023年第1期9卷 676-686页

作者： unichi Noaki satoshi Numazawa Joohyun Jeon Shuntaro Kochi PTCAD-4 Part Process TCAD LabSamsung Device Solutions R&D JapanSamsung Japan Corporation2-7Sugasawa-choTsurumi-kuYokohama 230-0027Japan Computational Science&Engineering Team SAMSUNG ELECTRONICSHwaseong-siGyeonggi-do 18448Korea

We developed the Si/o/h reactive force field parameter set and applied to silicon dry/wet oxidation process to understand the underlying physics of the thermal oxidation of the Si(100)*** a systematic development of the Si/o parameter using the experimental data of the volumes of the Sio_(2) crystal as a reference,we reproduced the same result over the temperature range of 300–1300 *** strategic tunings of parameters related to Si/o/h system,we carried out the simulation comparing the wet-and dry processes.A significant acceleration of the oxide film growth seen in the‘in-situ-steam-generation(ISSG)’is successfully *** properties of our model imply its applicability in wider *** compare our results with those obtained by using parameter set recently developed by other *** the configuration of atoms near the interface of the Sio_(2) film,our model is found to be able to study the role of hydrogen atoms for the ISSG acceleration.

关键词： process acceleration film

Effect of manufacturing methods of AgCl/Al_2o_3 catalyst on selective catalytic reduction of No_x

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Journal of Environmental Sciences 2011年第6期23卷 1033-1037页

作者： satoshi Kishida Dong-Ying Ju hirofumi Aritani Advanced Science Research Laboratory Saitama Institute of Technology 1690 Fusaiji Fukaya 369-0293 Japan Faculty of Engineering Saitama Institute of Technology 1690 Fusaiji Fukaya 369-0293 Japan Department of Life Science & Green Chemistry Saitama Institute of Technology 1690 Fusaiji Fukaya 369-0293 Japan

The AgCl/Al2o3 catalyst has potential for use in the selective catalytic reduction（SCR） of Nox.A compound hydrocarbon,following oxygenation is used as a type of reducing *** this experiment,the AgCl/Al2o3 catalyst was produced by four different methods,and the differences among their reduction catalysis of Nox were *** was used as a type of reducing agent.X-ray diffraction analysis was performed to study the crystalline structure and scanning electron microscope and transmission electron microscope（TEM） were applied to determine the *** results indicated that,in the range of 350-400℃,there was no significant difference on the Nox reduction rate;however,there was dispersion at high and low temperature *** size of the AgCl particles was about 20-100 nm.

关键词： AgCl/Al2o3 catalytic reduction SCR Nox

Up-grading of natural ilmenite ore by combining oxidation and acid leaching

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International Journal of Minerals,Metallurgy and Materials 2018年第7期25卷 729-736页

作者： takehito hiraki yuichi maruyama yuta suzuki satoshi itoh tetsuya nagasaka Department of Metallurgy Graduate School of EngineeringTohoku UniversitySendai 980-8579Japan Toho Titanium Co. Ltd.Kanagawa 253-8510Japan Fanuc Co. Ltd.Oshino-muraYamanashi 401-0511Japan Before retirement:Graduate School of Environmental Studies Tohoku UniversitySendai 980-8579Japan

Rutile （Tio2） is heavily used in pigments mid colormlts, mid the most abundmlt source of rutile is ilmeinte. Upon oxidation of ilmeinte, mtile cml be formed wiffl modest energy consumption; furfflermore, after leaching, only a few byproducts are formed. Unfortunate- ly, one drawback is file necessarily long oxidative process of typically used mefflods. In fflis study, we show fflat a fluidized bed reactor cml be used to oxidize ilmeinte ore to rapidly form ruffle mid pseudobrookite （Fe2Tios） phases. Ilmeinte was oxidized wiffl 5vo1% 02 in Ar at temperatures of 1173 K or 1223 K mid subsequently leached using a diluted h2So4 solution to dissolve file pseudobrookite phase. The effects of acid concentration, temperature, mid cooling rate after oxidation were investigated. We show fflat file ilmeinte was rapidly oxidized to form rutile mid pseudobrookite phases at 1173 mid 1223 K in a 5vo1% o2/95vo1% Ar environment wifflin 40 min. The fmal maximum mtile yield was 84.2mo1% after leaching in （1 ＋ 1） h2So4 solution at 393 K for 12 h.

关键词： ilmenite oxidation fluidized bed reactor acid leaching rutile pseudobrookite

Spontaneous regression of hepatocellular carcinoma: A mini-review

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World Journal of Gastroenterology 2017年第21期23卷 3797-3804页

作者： Akira Sakamaki Kenya Kamimura satoshi Abe Atsunori Tsuchiya Masaaki Takamura hirokazu Kawai satoshi Yamagiwa Shuji Terai Division of Gastroenterology and hepatology Graduate School of Medical and Dental Sciences Niigata University

Spontaneous tumor regression is an extremely rare phenomenon in the oncology field. however, there are several case reports resulted in the regression of hepatocellular carcinoma(hCC) and the accumulation of clinical information and analyses of the mechanism can contribute to the development of a novel therapy. For this purpose, we have carefully reviewed 23 cases of spontaneously regressed hCC published in recent 5 years and our case. The information regarding the tumor size, tumor marker, treatments, etc., have been summarized. The mechanism of spontaneous regression has been discussed to date and presumed to be due to many factors, including hypoxia and immunological reactions. In this careful review of the 24 cases based on the clinical information, hypoxia, systemic inflammation, and both upon spontaneous regression were seen in 3, 8, and 4 cases, respectively amo ng t he 15 c as e s f or w hic h t he inf o r mat io n regarding the proposed mechanisms are available. Recent development of immunotherapeutic approaches in oncology shows promising results, therefore, accumulation of additional cases and analysis of mechanisms underlying the spontaneous regression of hCC are essential and could lead to the development of a new generation of immunotherapies including antibodies directed against immune reactions.

关键词：自发的回归 hepatocellular 癌免疫学的反应免疫疗法组织缺氧

New pyrometallurgical process of EAF dust treatment with Cao addition

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International Journal of Minerals,Metallurgy and Materials 2015年第8期22卷 788-797页

作者： Romchat Chairaksa-Fujimoto Yosuke Inoue Naoyoshi Umeda satoshi Itoh Tetsuya Nagasaka Department of Metallurgy Graduate School of Engineering Tohoku University Toho Titanium Co. Ltd. honda Motor Co. Ltd.

The non-carbothermic zinc pyrometallurgical processing of electric arc furnace(EAF) dust was investigated on a laboratory scale. The main objective of this process was to convert highly stable zinc ferrite(Zn Fe2o4), which accounts for more than half of total zinc in the EAF dust, into Zn o and Ca2Fe2o5 by Ca o addition. The EAF dust was mixed with Ca o powder in various ratios, pressed into pellets, and heated in a muffle furnace in air at temperatures ranging from 700 to 1100°C for a predetermined holding time. All Zn Fe2o4 was transformed into Zn o and Ca2Fe2o5 at a minimum temperature of 900°C within 1 h when sufficient Ca o to achieve a Ca/Fe molar ratio of 1.1 was added. however, at higher temperatures, excess Ca o beyond the stoichiometric ratio was required because it was consumed by reactions leading to the formation of compounds other than Zn Fe2o4. The evaporation of halides and heavy metals in the EAF dust was also studied. These components could be preferentially volatilized into the gas phase at 1100°C when Ca o was added.

关键词： electric arc furnace dust pyrometallurgy zinc oxid

Effect of equal-channel angular pressing on pitting corrosion resistance of anodized aluminum-copper alloy

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中国有色金属学会会刊：英文版 2009年第4期19卷 904-908页

作者： In-Joon SoN hiroaki NAKANo satoshi oUE Shigeo KoBAYAShI hisaaki FUKUShIMA Zenji hoRITA Department of Materials Process Engineering Graduate School of EngineeringKyushu University Department of Materials Science and Engineering Faculty of EngineeringKyushu University Department of Applied Chemistry and Biochemistry Faculty of EngineeringKyushu Sangyo University

The effect of equal-channel angular pressing(ECAP) on the pitting corrosion resistance of anodized Al-Cu alloy was investigated by electrochemical techniques in a solution containing 0.2 mol/L AlCl3 and also by surface *** was conducted for 20 min at 200 and 400 A/m2 in a solution containing 1.53 mol/L h2So4 and 0.018 5 mol/L Al2(So4)3·16h2o at 20 ℃.Anodized Al-Cu alloy was immediately dipped in boiling water for 20 min to seal the micro pores present in anodic oxide *** time required before initiating pitting corrosion of anodized Al-Cu alloy is longer with ECAP than without,indicating that ECAP process improves the pitting corrosion resistance of anodized Al-Cu *** phase precipitates such as Si,Al-Cu-Mg and Al-Cu-Si-Fe-Mn intermetallic compounds are present in Al-Cu alloy and the size of these precipitates is greatly decreased by application of ***-Cu-Mg intermetallic compounds are dissolved during anodization,whereas the precipitates composed of Si and Al-Cu-Si-Fe-Mn remain in anodic oxide films due to their more noble corrosion potential than ***-SEM and EPMA observation reveal that the pitting corrosion of anodized Al-Cu alloy occurs preferentially around Al-Cu-Si-Fe-Mn intermetallic compounds,since the anodic oxide films are absent at the boundary between the normal oxide films and these impurity *** improvement of pitting corrosion resistance of anodized Al-Cu alloy processed by ECAP appears to be attributed to a decrease in the size of precipitates,which act as origins of pitting corrosion.

关键词：铝铜合金抗点蚀挤压转角通道

Use of hybrid chitosan membranes and human mesenchymal stem cells from the Wharton jelly of umbilical cord for promoting nerve regeneration in an axonotmesis rat model

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Neural Regeneration Research 2012年第29期7卷 2247-2258页

作者： Andrea Gärtner Tiago Pereira Maria Joāo Simōes Paulo AS Armada-da-Silva Miguel L França Rosa Sousa Simone Bompasso Stefania Raimondo Yuki Shirosaki Yuri Nakamura satoshi hayakawa Akiyoshi osakah Beatriz Porto Ana Lúcia Luís Artur SP Varejāo Ana Colette Maurício Animal Science and Study Centre/Food and Agrarian Sciences and Technologies Institute Porto University4099-003 PortoPortugal Institute of Biomedical Sciences Abel Salazar Veterinary Clinics DepartmentPorto UniversityPorto 4099-003Portugal Faculty of human Kinetics Technical University of LisbonCruz Quebrada-Dafundo1499-002Portugal Institute of Biomedical Sciences Abel Salazar Cytogenetic DepartmentPorto UniversityPorto 4099-003Portugal Neuroscience Institute of the Cavalieri ottolenghi Foundation Orbassano 10043TurinItaly Department of Clinical and Biological Sciences University of TurinOrbassano 10010TurinItaly Graduate School of Natural Science and Technology Okayama UniversityOkayama 700-8530Japan Faculty of Engineering Okayama UniversityOkayama 700-8530Japan Department of Veterinary Sciences Research Centre in SportsHealth and Human DevelopmentUniversity of Trás-os-Montes and Alto DouroVila Real 5001-801Portugal

Many studies have been dedicated to the development of scaffolds for improving post-traumatic nerve regeneration. The goal of this study was to assess the effect on nerve regeneration, associating a hybrid chitosan membrane with non-differentiated human mesenchymal stem cells isolated from Wharton＇s jelly of umbilical cord, in peripheral nerve reconstruction after crush injury. Chromosome analysis on human mesenchymal stem cell line from Wharton＇s jelly was carried out and no structural alterations were found in metaphase. Chitosan membranes were previously tested in vitro, to assess their ability in supporting human mesenchymal stem cell survival, expansion, and differentiation. For the in vivo testing, Sasco Sprague adult rats were divided in 4 groups of 6 or 7 animals each： Group 1, sciatic axonotmesis injury without any other intervention （Group 1-Crush）; Group 2, the axonotmesis lesion of 3 mm was infiltrated with a suspension of 1 250 -1 500 human mesenchymal stem cells （total volume of 50 pL）（Group 2-CrushCell）; Group 3, axonotmesis lesion of 3 mm was enwrapped with a chitosan type Ill membrane covered with a monolayer of non-differentiated human mesenchymal stem cells （Group 3-CrushChitlllCell） and Group 4, axonotmesis lesion of 3 mm was enwrapped with a chitosan type III membrane （Group 4-CrushChiUll）. Motor and sensory functional recovery was evaluated throughout a healing period of 12 weeks using sciatic functional index, static sciatic index, extensor postural thrust, and withdrawal reflex latency. Stereological analysis was carded out on regenerated nerve fibers. Results showed that infiltration of human mesenchymal stem cells, or the combination of chitosan membrane enwrapment and human mesenchymal stem cell enrichment after nerve crush injury provide a slight advantage to post-traumatic nerve regeneration. Results obtained with chitosan type III membrane alone confirmed that they significantly improve post-traumatic axonal regrowth and may represent

关键词： stem cells mesenchymal stem cells Wharton jelly umbilical cord biomaterials chitosan axonotmesis functional analysis rat karyotype analysis stereological analysis

Genome-wide Association Study Reveals that the Aquaporin NIP1;1 Contributes to Variation in hydrogen Peroxide Sensitivity in Arabidopsis thaiiana

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Molecular Plant 2017年第8期10卷 1082-1094页

作者： Ayan Sadhukhan Yuriko Kobayashi Yuki Nakano satoshi luchi Masatomo Kobayashi Lingaraj Sahoo hiroyuki Koyama Faculty of Applied Biological Sciences Gifu University Gifu 501-1193 Japan Experimental Plant Division RIKEN BioResource Center Tsukuba Ibaraki 305-0074 Japan Department of Biosciences and Bioengineering Indian Institute of Technology Guwahati Guwahati India

hydrogen peroxide （h202） is a reactive oxygen species that affects cell signaling in various plant defense responses and induces programmed cell death. To identify the new components associated with h202 signaling and tolerance, we conducted a genome-wide association study （GWAS） on the root growth of 133 Arabidopsis thaliana accessions grown in the presence of toxic h2o2 levels. The most significant SNPs were associated with a cluster of chromosome 4 genes encoding an aquaporin NoDULIN 26-LIKE INTRINSIC PRoTEIN 1; 1 （NIP1;1）, an NB-ARC domain-containing disease resistance protein （AT4G19050）, and a putative membrane lipoprotein （AT4G19070）. The expression level of NIP1;1 was relatively high in A. thaliana accessions sensitive to h2o2. Additionally, overexpression of NIP1;1 in a tolerant accession （e.g., Col-0） increased the sensitivity of transgenic plants to h2o2. An in planta β-glucuronidase reporter assay revealed that variations in the NIP1;1 promoter were responsible for the differences of its expression level in h2o2-tolerant and -sensitive accessions. Cell death was extensive and h2o2 levels were high in the roots of h2o2-sensitive and NIP1;1-overexpressing accessions. Together, our results indicate that the aquaporin NIP1;1 is a key determinant of the sensitivity ofA. thaliana to h2o2, and contributes to the phenotypic variations detected by our GWAS.

关键词： aquaporin GWAS hydrogen peroxide programmed cell death root length signaling