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Plasma Science and Technology 2023年第3期25卷 78-86页

作者： Trung Nguyen TRAN Min HU Tomohiro OGASAWARA Yuki iwata Haruka SUZUKI Jin SAKAMOTO Masafumi AKIYOSHI Hirotaka TOYODA Hiroto MATSUURA Department of Quantum and Radiation Engineering Osaka Prefecture University Department of Electronics Nagoya University Faculty of Chemistry Materials and BioengineeringKansai University Department of Quantum and Radiation Engineering Osaka Metropolitan University

This study proposes polyvinyl alcohol–potassium iodide(PVA–KI)as a novel gel chemical *** probe uses the reactions among PVA,KI,water,borax,and oxidative species to visualize the distribution of reactive *** method provides information regarding the distribution of reactive species by coloration on the gel *** effects of the surrounding gas phase on the distribution and diffusion of the reactive species are also investigated using the PVA–KI gel ***,the relationship between the irradiation distance and reactive species diffusion is determined on the surface of the PVA–KI probe with and without plastic *** the irradiation distance appropriately leads to an increase in the modified area as detected by the PVA–KI gel probe *** relative concentration distributions of the reactive species are also obtained from visualized color distributions measured using a ***,reactive species generation by long-scale line plasma is confirmed by the color reaction on the PVA–KI gel surface,with a greater area being covered by an atmospheric-pressure pulsed microwave line plasma source.

关键词： atmospheric-pressure plasma jet(APPJ) PVA–KI gel chemical probe argon plasma jets

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How to work together for engineering materials!

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Materials Genome Engineering Advances 2023年第2期1卷 7-24页

作者： Shuichi iwata University of Science and Technology Beijing BeijingChina

To share and utilize data effectively for collaborative work,a common understanding of the knowledge behind the data,including its context and meaning,is a fundamental *** paper focuses on the gaps that hinder common understanding between the real world and the data space,acting as barriers between systems,organizations,data spaces,and *** understand the core reasons and devise strategies for bridging the gap,the author has endeavored to synthesize a case study of material data activities from two perspectives:diachronic and synchronic,which is framed into a two-step process,involving the establishment of intersubjectivity among experts and interobjectivity among materials/substances *** a result,the author has formulated an action plan for the digitization of engineering materials,encompassing tacit knowledge,know-how,and intellectual property rights to establish a foundation for their use with traceability,interoperability,and *** order to create a conceptual framework that enhances a productive ecosystem facilitated by networked materials and substance databases,this plan is conclusively based on two key steps:fostering interactions among experts rooted in substances and materials and standardizing digitized data related to substances/materials based on their geospatial structural information.

关键词： data activity data and reality data model engineering materials interobjectivity intersubjectivity metadata metamodel

Alternative Infinitesimal Generator of Invertible Evolution Families

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Journal of Applied Mathematics and Physics 2017年第4期5卷 822-830页

作者： Yoritaka iwata Institute of Innovative Research Tokyo Institute of Technology Tokyo Japan Department of Mathematics Shibaura Institute of Technology Tokyo Japan

A logarithm representation of evolution operators is defined. Generators of invertible evolution families are characterized by the logarithm representation. In this article, using the logarithm representation, a concept of evolution operators without satisfying the semigroup property is introduced. In conclusion the existence of alternative infinitesimal generator is clarified.

关键词： Invertible Evolution Family Abstract Cauchy Problem

Zero Sound Propagation in Femto-Scale Quantum Liquids

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Journal of Modern Physics 2012年第6期3卷 476-482页

作者： Yoritaka iwata GSI Helmholtzzentrum für Schwerionenforschung Darmstadt Germany

Charge equilibration has been recognized as a dominant process at the early stage of low-energy heavy-ion reactions. The production of exotic nuclei is suppressed under the appearance of charge equilibration, in which the proton-neutron ratios of the final reaction products are inevitably averaged. Therefore charge equilibration plays one of the most crucial roles in the synthesis of chemical elements. Focusing on how and when the charge equilibration takes place, zero sound propagation in femto-scale quantum liquids is explained.

关键词： Quantum Liquids Charge Equilibration

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无中微子双β衰变相关的中微子势（英文）

原子核物理评论 2017年第1期34卷 82-86页

作者： Yoritaka iwata 东京工业大学技术创成研究院芝浦工业大学数学系

介绍了在双β衰变中的闭合近似下的原子核矩阵元,并在此基础上研究了无中微子双β衰变的中微子势部分及统计性质。分析结果显示,费米型和伽莫夫-泰勒型矩阵元部分贡献了几乎相等的正值,并且费米型部分一般比伽莫夫-泰勒型部分的贡献稍大... 详细信息

介绍了在双β衰变中的闭合近似下的原子核矩阵元,并在此基础上研究了无中微子双β衰变的中微子势部分及统计性质。分析结果显示,费米型和伽莫夫-泰勒型矩阵元部分贡献了几乎相等的正值,并且费米型部分一般比伽莫夫-泰勒型部分的贡献稍大,而张量部分的贡献虽小但不可忽略,其中有少量矩阵元为负。阐明了无中微子双β衰变的中微子势中费米型、伽莫夫-泰勒型及张量部分大于零矩阵元的关联。该统计结果粗略地揭示了这些组份对原子核矩阵元的贡献。

关键词：无中微子双β衰变中微子势核矩阵元

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Ultrastructural changes in porcine liver sinusoidal endothelial cells of machine perfused liver donated after cardiac death

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World Journal of Gastroenterology 2022年第19期28卷 2100-2111页

作者： Hiroki Bochimoto Yo Ishihara Nur Khatijah Mohd Zin Hiroyoshi iwata Daisuke Kondoh Hiromichi Obara Naoto Matsuno Department of Cell Physiology The Jikei University School of MedicineMinato-ku 105-8461TokyoJapan Department of Transplantation Technology and Therapeutic Development Asahikawa Medical UniversityAsahikawa 078-8510HokkaidoJapan Department of Surgery Asahikawa Medical UniversityAsahikawa 078-8510HokkaidoJapan Laboratory of Veterinary Anatomy Obihiro University of Agriculture and Veterinary MedicineObihiro 080-8555HokkaidoJapan Department of Mechanical Engineering Tokyo Metropolitan UniversityHachioji 192-0397TokyoJapan

BACKGROUND The machine perfusion(MP)preservation including hypothermic MP(HMP)and midthermic MP(MMP)has been considered as a promising strategy to preserve the functions of liver donated after cardiac *** importance of understanding liver sinusoidal endothelial cells(LSEC)damage in regulating liver injury during MP has been ***,the ultrastructural changes in the LSEC and sinusoids around them after MP are *** To investigate the ultrastructural changes in the LSEC and sinusoids around them after *** Porcine liver grafts undergo a warm ischemia time of 60 minutes perfused for 4 h with modified University of Wisconsin gluconate *** A grafts were preserved with HMP at 8℃ constantly for 4 *** B grafts were preserved with a rewarming solution at 22℃ by MMP for 4 *** the ultrastructural changes in the LSEC and sinusoids in Group A and B were comparatively analyzed by using osmium-maceration scanning electron microscopy with complementary transmission electron microscopy *** An analysis of the LSEC after warm ischemia revealed that mitochondria with condensed-shaped cristae,abnormal vesicles,reduction of ribosomes and the endoplasmic reticulum(ER)surround the mitochondria *** MP subsequent after warm ischemia alleviate the abnormal vesicles and reduction of ribosomes in LSEC,which indicated the reduction of the ER ***,MMP could restore the tubular mitochondrial cristae,while after HMP the condensed and narrow mitochondrial cristae *** addition,the volume of the sinusoidal space in the liver grafts after MMP were restored,which indicated a lower risk of pressure injury than *** MMP alleviates the ER damage of LSEC by warm ischemia,additionally restore the metabolism of LSEC via the normalization of mitochondria and prevent the share stress damage of liver grafts.

关键词： Liver Sinusoidal endothelial cells Warm ischemia Machine perfusion preservation Transplantation Ultrastructure

0.025-inch vs 0.035-inch guide wires for wire-guided cannulation during endoscopic retrograde cholangio pancreatography:A randomized study

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World Journal of Gastroenterology 2015年第30期21卷 9182-9188页

作者： Katsuya Kitamura Akira Yamamiya Yu Ishii Yoshiki Sato Tomoyuki iwata Tomohiro Nomoto Akitoshi Ikegami Hitoshi Yoshida Division of Gastroenterology Department of MedicineShowa University School of Medicine

AIM:To compare the clinical outcomes between 0.025-inch and 0.035-inch guide wires(GWs) when used in wire-guided cannulation(WGC).METHODS:A single center,randomized study was conducted between April 2011 and March 2013. This study was approved by the Medical Ethics Committee at our hospital. Informed,written consent was obtained from each patient prior to study enrollment. Three hundred and twenty-two patients with a na?ve papilla of Vater who underwent endoscopic retrograde cholangiopancreatography(ERCP) for the purpose of selective bile duct cannulation with WGC were enrolled in this study. Fifty-three patients were excluded based on the exclusion criteria,and 269 patients were randomly allocated to two groups by a computer and analyzed:the 0.025-inch GW group(n = 109) and the 0.035-inch GW group(n = 160). The primary endpoint was the success rate of selective bile duct cannulation with WGC. Secondary endpoints were the success rates of the pancreatic GW technique and precutting,selective bile duct cannulation time,ERCP procedure time,the rate of pancreatic duct stent placement,the final success rate of selective bile duct cannulation,andthe incidence of post-ERCP pancreatitis(PEP).RESULTS:The primary success rates of selective bile duct cannulation with WGC were 80.7%(88/109) and 86.3%(138/160) for the 0.025-inch and the 0.035-inch groups,respectively(P = 0.226). There were no statistically significant differences in the success rates of selective bile duct cannulation using the pancreatic duct GW technique(46.7% vs 52.4% for the 0.025-inch and 0.035-inch groups,respectively; P = 0.884) or in the success rates of selective bile duct cannulation using precutting(66.7% vs 63.6% for the 0.025-inch and 0.035-inch groups,respectively; P = 0.893). The final success rates for selective bile duct cannulation using these procedures were 92.7%(101/109) and 97.5%(156/160) for the 0.025-inch and 0.035-inch groups,respectively(P = 0.113). There were no significant differences

关键词： Endoscopic retrograde cholangiopancreatography Guide wire Post-endoscopic retrogradecholangiopancreatography pancreatitis Selective bileduct cannulation Wire-guided cannulation

BIOLOGICAL SIGNIFICANCE OF EFFECTS OF PHYTOPHAGOUS FISHES ON PHYTOPLANKTON

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Chinese Journal of Oceanology and Limnology 1989年第4期7卷 335-338页

作者： T.Miura K.iwata 章宗涉 Otsu Hydrobiological Station Kyoto University Otsu Japan Faculty of Education Wakayama University WakayamaJapan Shanghai Normal University Shanghai PRC

The effects of phytophagous fishes on phytoplankton primary productivity in a freshwater pond , the importance of recycling of algae in fish feces .and the species specific interaction with phytoplanktons were studied . Phaeopigment amounts in pond water and in feces of fish were compared . The reduction of chlorophylla into phaeopigments in the process of passing through the phytophagous fish intestines was analyzed , and used for a direct comparison of the production rates of phytoplanktons before and after intestinal passage .

关键词： phytoplankton algae recycling passage freshwater ecosystem intestine productivity Japanese Microcystis

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Inflammation and de-differentiation in pancreatic carcinogenesis

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World Journal of Clinical Cases 2018年第15期6卷 882-891页

作者： Takahiro Seimiya Motoyuki Otsuka Takuma iwata Eri Tanaka Tatsunori Suzuki Kazuma Sekiba Mari Yamagami Rei Ishibashi Kazuhiko Koike Department of Gastroenterology Graduate School of Medicine The University of Tokyo

Pancreatic cancer is a malignancy with an extremely poor prognosis. Chronic pancreatitis is a well-known risk factor for pancreatic cancer. Inflammation is thought to influence carcinogenesis through DNA damage and activation of intracellular signaling pathways. Many transcription factors and signaling pathways co-operate to determine and maintain cell identity at each phase of pancreatic organogenesis and cell differentiation. Recent studies have shown that carcinogenesis is promoted through the suppression of transcription factors related to differentiation. Pancreatitis also demonstrates transcriptional changes, suggesting that multifactorial epigenetic changes lead to impaired differentiation. Taken together, these factors may constitute an important framework for pancreatic carcinogenesis. In this review, we discuss the role of inflammation and de-differentiation in the development of pancreatic cancer, as well as the future of novel therapeutic applications.

关键词： Pancreatitis Inflammation Organogenesis Differentiation Transcription factor Pancreatic cancer

Si nanowire FET and its modeling

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Science China(Information Sciences) 2011年第5期54卷 1004-1010+1012页

作者： IWAI Hiroshi NATORI Kenji SHIRAISHI Kenji iwata Jun-ichi OSHIYAMA Atsushi YAMADA Keisaku OHMORI Kenji KAKUSHIMA Kuniyuki AHMET Parhat Frontier Research Center Tokyo Institute of Technology Yokohama Japan Interdisciplinary Graduate School of Science and Engineering Tokyo Institute of Technology Yokohama Japan Graduate School of Pure and Applied Sciences University of Tsukuba Tsukuba Japan Center for Computational Sciences University of Tsukuba Tsukuba Japan School of Engineering The University of Tokyo Tokyo Japan

Because of its ability to effectively suppress off-leakage current with its gate-around conffguration, the Si nanowire FET is considered to be the ultimate structure for ultra-small CMOS devices to the extent that the devices would be approaching their downsized limits. Recently, several experimental studies of Si nanowire FETs with on-currents much larger than those of planar MOSFETs have been published. Consequently, Si nanowire FETs are now gaining significant attention as the most promising candidate for mainstream CMOS devices in the 2020s. To enable the introduction of the Si nanowire FETs into integrated circuits, good compact models, which circuit designers can easily handle, are essential. However, it is a very challenging task to establish such a compact model, because the ID - VD characteristics of Si nanowire FETs are affected by the band structure of the nanowire, which is very sensitive to the nanowire diameter, cross-sectional shape, crystal orientation, mechanical stress and interface states. In this paper, the recent status of research on Si nanowire FETs in experimental and theoretical studies is described.

关键词： Si nanowire MOSFET modeling