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First-principles simulation and experimental evidence for improvement of transmittance in ZnO films

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Progress in Natural Science:Materials International 2011年第1期21卷 40-45页

作者： ri-ichi murakami Department of Mechanical Engineering The University of Tokushima2-1 Minamijosanjima-choTokushima 770-8506Japan

ZnO/Ag/Glass films were prepared by a DC magnetron sputtering system,which exhibit both excellent properties of high conductivity and high ***,an enhancement of transmission of ZnO films was observed after brought into contact to a silver layer,but the understanding of experimental findings for the enhancement of transmission was ***,the first-principles simulations of electrical and optical properties were utilized using the density functional theory with local-density approximations or generalized-gradient *** crystal structure of ZnO or Ag was imported from the Material Studio *** periodic supercell has the same atomic ratio with the experimental structure and was optimized using the CASTEP package in Material *** to the calculation results,the enhancement in transmission is attributed to the surface plasmon polariton in the asymmetric structure films.

关键词： first-principles transparent conductive oxide ZnO transmittance surface plasmon polaritons

Effect of process parameters on electrical,optical properties of IZO films produced by inclination opposite target type DC magnetron sputtering

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中国有色金属学会会刊：英文版 2009年第4期19卷 997-1000页

作者： Do-Hoon SHIN Yun-Hae KIM Joong-Won HAN Kyung-Man MOON ri-ichi murakami Korean Air Aerospace Division Department of Mechanical and Material Engineering Korea Maritime University Department of Mechanical Engineering The University of Tokushima

IZO films were deposited onto PET substrate at room temperature with the inclined opposite target type DC magnetron sputtering equipment,in which a sintered oxide IZO target(doped with 10% ZnO,packing density of 99.99%) was *** effects of total sputtering pressure and film thickness on IZO films properties were *** the films produced at room temperature have a amorphous structure,irrespective of the total sputtering pressure and film thickness.A resistivity of the order of 10-4 Ωcm was obtained for IZO films deposited at lower pressure(film thickness of 190 nm).The resistivity of IZO films deposited at room temperature depends on film thickness and shows a minimum at a thickness of 530 nm.

关键词：溅射薄膜工艺参数光学性能磁控直流类型薄膜厚度电力

Immobilization of cross-linked In-doped Mo(O,S)2 on cellulose nanofiber for effective organic-compound degradation under visible light illumination

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Progress in Natural Science:Materials International 2021年第3期31卷 404-413页

作者： Hairus Abdullah Chi-Ning Hsu Hardy Shuwanto Noto Susanto Gultom Worku Lakew Kebede Chang-Mou Wu Chiu-Chun Lai ri-ichi murakami Masayuki Hirota Antonio Norio Nakagaito Dong-Hau Kuo Department of Materials Science and Engineering National Taiwan University of Science and Technology Department of Textile Engineering Chinese Culture University New Material Research & Development Department Frontier Materials Laboratories Osaka Gas Chemicals Co. Ltd. Graduate School of Technology Industrial and Social Sciences Tokushima University

Relatively small amounts of In-doped Mo(O,S)2(IMS) catalysts(10%, 20%, and 30%) were deposited on cellulose nanofiber(CNF) by cross-linking them with functional groups of siloxane and epoxy to form CNF-IMS hybrid composites. The as-prepared hybrid composites were characterized and tested their performances toward the photo degradations of cationic(MB and Rh B) and anionic(MO) dyes. As indium was doped into Mo(O,S)2lattice to form solid-solution, the charge transfer and photocarrier separation during the catalytic reaction were simultaneously enhanced as probed with electrochemical impedance spectroscopy and photoluminescence measurements, respectively. To ensure the catalyst on CNF was well deposited and recyclable, the hybrid composite was evaluated with a reusability experiment to show the stability performance in degrading organic dyes. It was found the environmentally friendly CNF-IMS hybrid composite was relatively stable during the reusability experiment, indicating no catalyst powder was leached out during the photocatalytic reaction. The photoreaction mechanism was convinced by radical-scavenging experiments to show that hydroxyl and superoxide played essential roles for the organic dye degradations in visible-light illuminated conditions. The cross-linked organic/inorganic hybrid catalyst showed a prospective visible light active material not only to solve the environmental issue due to the leaching of nanoparticles but also to lower the post-treatment/recycling cost of photocatalyst in industrial application.

关键词： Cellulose nanofiber In-doped Mo(O,S) 2 Cross-linking In 2 (O,S) 3 Organic dye degradation

压铸AZ91D镁合金在不同pH值的Na_2SO_4溶液中的腐蚀行为(英文)

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Transactions of Nonferrous Metals Society of China 2011年第4期21卷 912-920页

作者：田赟杨丽景李艳芳卫英慧侯利锋李永刚 ri-ichi murakami 太原理工大学材料科学与工程学院太原030024 Department of Mechanical Engineering University of Tokushima

研究压铸AZ91D镁合金在不同pH值的0.1mol/LNa2SO4溶液中的腐蚀行为,利用SEM、FTIR及XRD等手段对压铸AZ91D镁合金在Na2SO4溶液中的腐蚀速率、腐蚀产物形貌和腐蚀产物组分进行定量和定性分析。结果表明:压铸AZ91D镁合金在不同pH值Na2SO4... 详细信息

研究压铸AZ91D镁合金在不同pH值的0.1mol/LNa2SO4溶液中的腐蚀行为,利用SEM、FTIR及XRD等手段对压铸AZ91D镁合金在Na2SO4溶液中的腐蚀速率、腐蚀产物形貌和腐蚀产物组分进行定量和定性分析。结果表明:压铸AZ91D镁合金在不同pH值Na2SO4溶液中的腐蚀速率顺序从高到低依次为pH2,pH4,pH7,pH9,pH12,酸性溶液的腐蚀速率大于碱性溶液的腐蚀速率;在Na2SO4溶液中,腐蚀产物主要为Mg(OH)2和MgAl2(SO4)4·22H2O,不同的pH值能改变腐蚀速率和腐蚀产物形貌;氯离子和硫酸根离子有不同的点蚀引发时间。

关键词：镁合金腐蚀硫酸钠 pH值

Unexpected/contrary behavior of aerosol mass concentration in response to the individual components'concentration reduction in Kitakyushu,Japan

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Journal of Environmental Sciences 2024年第1期135卷 630-639页

作者： Xi Zhang Takuya murakami Jinhe Wang Masahide Aikawa Faculty of Environmental Engineering The University of Kitakyushu1-1HibikinoWakamatsuKitakyushuFukuoka 808-0135Japan Resources and Environment Innovation Research Institute School of Municipal and Environmental EngineeringShandong Jianzhu UniversityJinan 250101China

In the suburbs of Kitakyushu,Japan,the inorganic aerosol mass concentration(IAM)was about 32.7μg/m^(3),with the aerosol pH of *** study the thermodynamics of aerosol when its individual components'concentration is reduced,sensitive tests were performed using the ISORROPIAⅡmodel,in which the seven control species—TNaCl,TNH_(4)^(+),TSO_(4)^(2-),TNO_(3)^(-),TMg^(2+),TK^(+),and TCa^(2+)—were taken into *** and inorganic aerosol pH after reducing TNaCl,TNO_(3)^(-),TMg^(2+),TK^(+),and TCa^(2+)responded linearly(0%≤concentration reduction ratio(CRR)≤100%,with the exception of 100%in TNaCl);the nonlinear variations of these two parameters could be observed by controlling TNH_(4)^(+)and TSO_(4)^(2-).Unexpected aerosol behavior occurred at 100%reduction of TNaCl,which was caused by the sudden increase of NO_(3)^(-),NH_(4)^(+),and aerosol liquid water content(ALWC);the increase of IAM was also observed after controlling TSO_(4)^(2-)(60%≤CRR≤100%)and TCa^(2+)(0%≤CRR≤100%),which was mainly related to the variation of ALWC driven by the response of CaSO_(4).Multiple regression analysis showed that ALWC was statistically and strongly related to the variations of NO_(3)^(-),Cl-,SO_(4)^(2-),HSO_(4)^(-),HNO_(3),and NH_(3)(Pristics and inner responses for the reduction of components,which is of great significance for a better understanding of atmospheric chemistry in Kitakyushu,Japan.

关键词： Sensitive tests Reduction Gas-particle conversion process Aerosol liquid water content Sea salts

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SiOxNy薄膜结构对气体阻隔性的影响

中国印刷与包装研究 2011年第2期3卷 73-75页

作者： Daisuke Yonekura Katsuhiro Fujikawa ri- ichi murakami 桑利军(编译) Department of Mechanical Engineering The University of Tokushima 2-1 Minami-josanjimaTokushima 770-8506 Japan 不详

在聚合物表面沉积一层薄膜可以有效阻止氧气和水蒸气的渗透,目前比较常用的阻隔膜为氧化铝薄膜和氧化硅薄膜。氧化铝薄膜具有很好的气体阻隔性能,被广泛应用于食品包装;氧化硅薄膜也是比较流行的透明包装阻隔材料。近年来随着包装业的发... 详细信息

在聚合物表面沉积一层薄膜可以有效阻止氧气和水蒸气的渗透,目前比较常用的阻隔膜为氧化铝薄膜和氧化硅薄膜。氧化铝薄膜具有很好的气体阻隔性能,被广泛应用于食品包装;氧化硅薄膜也是比较流行的透明包装阻隔材料。近年来随着包装业的发展,对包装品阻隔性的要求越来越高,如要求更长的货架期。然而,目前所应用的氧化物阻隔膜已很难达到这一更高的要求。经研究发现,相对于氧化硅薄膜,类金刚石（DLC）是非常有前景的阻隔材料,特别是氮氧化硅（SiOxNy）薄膜,可以提供更高的阻隔性能。

关键词：气体膜结构食品包装氧化铝薄膜水蒸气聚合物包装业

Flow Rate Measurement of Gravity Infusion Set and Functional Evaluation of Drop Counter: A Pilot Study

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Journal of Biomedical Science and Engineering 2024年第7期17卷 129-135页

作者： rina Sakai Shuichi Tanaka Kaya murakami Tomomi Mizuhashi Kazuhiro Yoshida Masanobu Ujihira Department of Medical Engineering and Technology Kitasato University School of Allied Health Sciences Sagamihara Japan Faculty of Medical Engineering Gunma University of Health and Welfare Maebashi Japan Kitasato University Graduate School of Medical Sciences Sagamihara Japan

Developing a novel drop counter by introducing the Internet of Things concept has been vigorously conducted in recent years. Understanding the newly introduced drop counter’s flow rate control accuracy and flow rate count feature is essential for improving safety in infusion management. This study aimed to verify if the new drop counters could secure accurate flow rate and drip count by conducting actual flow rate measurements using gravimetry and functional evaluation. A drop counter was attached to each drip chamber of the infusion set, and an IV drip was conducted at the 100 ml/h flow rate. The weight of discharged physiological saline was measured to plot trumpet curves. Next, three different types of drop counters were evaluated to determine if they maintained drip count accuracy according to the changes in their position angles. The flow rate errors in all conditions indicated trumpet-like curves, exhibiting an overall error range within ±10% in all observation windows. Although every drop counter successfully detected and measured dripping, it was challenging in some counters to detect dripping when the drip chamber was tilted. In comparing adult and pediatric IV sets, the adult IV set was found to be less likely to detect dripping in the angled position. No significant differences in results were confirmed between high and low flow rates, suggesting that the drop count function would not be affected by the flow rate in the ranges of typical infusion practices. Doppler sensors have a wide range of measurements and high sensitivity;the dripping was detected successfully even when the drip chamber was tilted, probably due to the advantages of these sensors. In contrast, miscounts occurred in those equipped with infrared sensors, which could not detect light intensity changes in tilted positions. Understanding the tendencies in flow rate errors in infusion can be valuable information for infusion management.

关键词： Gravity Infusion Set Drop Counter IV Fluids Flow Rate Trumpet Curves

Study on Distribution of Four Pseudomonas Species in Living Environment Using Multiplex PCR

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Open Journal of Stomatology 2024年第2期14卷 77-86页

作者： Sachiyo Hayashi Koji Umezawa Osamu Tsuzukibashi Akira Fukatsu Mana Fuchigami Chiaki Komine Hiroshi Yamamoto Mio Hagiwara-Hamano Yukiko Iizuka Satoshi Uchibori Masanobu Wakami Hiroshi murakami Taira Kobayashi Masahiko Fukumoto Takato Nomoto Department of Special Needs Dentistry Nihon University School of Dentistry at Matsudo Chiba Japan Department of Laboratory Medicine for Dentistry for the Compromised Patient Nihon University School of Dentistry at Matsudo Chiba Japan Department of Oral Surgery Nihon University School of Dentistry at Matsudo Chiba Japan Department of Fixed Prosthodontics Nihon University School of Dentistry at Matsudo Chiba Japan Department of Oral Implantology Nihon University School of Dentistry at Matsudo Chiba Japan

Purpose: The genus Pseudomonas is a ubiquitous microorganism frequently detected from immunocompromised patients. The inherent resistance to numerous antimicrobial agents contributes to the opportunistic character of this pathogen exhaustive monitoring of this pathogen is considered of critical importance to public health organizations. The reliable identification method able to distinguish genetic close Pseudomonas species is needed, because these organisms are difficult to differentiate by phenotypic or biochemical methods. The purpose of the present study was to design species-specific primers in order to identify and detect four Pseudomonas species which are frequently detected from the human oral cavities, and to investigate the distribution of these organisms in the living environment using a multiplex PCR. Methods: Polymerase chain reaction (PCR) primers were designed based on partial sequences of the rpoD gene of four Pseudomonas species. Swab samples were collected from fifty washstands, and the distribution of Pseudomonas species was investigated using a conventional PCR at genus level and a multiplex PCR at species level. Results: Multiplex PCR method developed in this study was able to distinguish four Pseudomonas species clearly. The genus Pseudomonas was detected from all samples (100%), whereas P. putida, P, aeruginosa, P. stutzeri and P. fluorescens were detected at 44%, 8%, 4% and 2% in fifty swab samples, respectively. Conclusion: Our developed one-step multiplex PCR method is accurate, specific, cost-effective, time-saving, and works without requiring DNA extraction. It was indicated that washstands were the uninhabitable environment for P. putida, P, aeruginosa, P. stutzeri and P. fluorescens.

关键词： Genus Pseudomonas Multiplex PCR Living Environment

Laparoscopic duodenojejunostomy for malignant stenosis as a part of multimodal therapy:A case report

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World Journal of Clinical Cases 2022年第16期10卷 5324-5330页

作者： Teppei murakami Yugo Matsui Department of Surgery Kobe City Hospital Organization Kobe City Center West HospitalKobe 653-0013HyogoJapan

BACKGROUND Laparoscopic duodenojejunostomy(LDJ) has become the standard surgical procedure for superior mesenteric artery syndrome due to its sufficient outcome in terms of safety and symptom relief. However, there are only a few reports about LDJ for malignant stenosis and its indication remains *** SUMMARY A 77-year-old woman with a history of pancreatic cancer(PC) treated with distal pancreatectomy with en bloc resection of the transverse colon 7 mo ago was admitted for recurrent vomiting. Imaging upon admission revealed marked distention of the duodenum and a tumor around the duodenojejunal flexure. She was diagnosed with malignant stenosis caused by local recurrence of PC. LDJ was performed with an uneventful postoperative course, followed by chemotherapy which gave her 10 mo overall *** We think that LDJ is a valuable method for unresectable malignant stenosis around the duodenojejunal flexure as a part of multimodal therapy.

关键词： Duodenojejunostomy Laparoscopic surgery Malignant stenosis Pancreatic cancer Multimodal therapy