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Application of electrochemical depassivation in PRB systems to recovery Fe^0 reactivity

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Frontiers of Environmental Science & Engineering 2016年第4期10卷 33-41页

作者： Xin LU Miao LI Hao DENG Pengfei LIN Mark R. matsumoto Xiang LIU School of Environment Tsinghua University Beijing 100084 China CNPC Research Institute of Safety & Environmental Technology Beijing 102206 China State Key Laboratory of Petroleum and Petrochemical Pollution Control and Treatment Beijing 102206 China College of Chemical Engineering China University of Petroleum (East China) Qingdao 266580 China Department of Chemical and Environmental Engineering University of California Riverside Riverside CA 92521 USA

Permeable reactive barriers （PRBs） show remarkable Cr（VI） removal performance. However, the diminished removal rate because of mineral fouling over time is the bottleneck for application of PRBs. The present study demonstrated that electrochemical depassivation was effective for recovering the Fe^0 reactivity, and minerals can be cleaned layer by layer with no secondary ion contamination and no transformation from Cr（III） to Cr（VI）. The removal recovery rate increased with increasing electrolysis voltage before reaching the optimal electrolysis voltage, and then decreased as the electrolysis voltage further increased. The recovery effect at electrolysis voltages of 5, 10, and 15 V show the same trend as a function of electrolysis time, where recovery rate first increased and then decreased after reaching the optimal electrolysis time. The Cr（VI） removal rate significantly decreased with increasing electrolysis distance. Furthermore, Fe^0 brush meshes electrode, Fe^0 fillings, and polyvinyl chloride （PVC） meshes separators were combined to create an Electro-PRB configuration for the caisson excavation construction technique, which lays the foundation for establishment of promising Electro-PRB systems to treat Cr（VI）-contaminated groundwater.

关键词： PRB Cr(VI) Fe Passivation Electrochemical depassivation

Fabrication of initial trabecular bone-inspired three-dimensional structure with cell membrane nano fragments

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Regenerative Biomaterials 2023年第1期10卷 73-80页

作者： Koichi Kadoya Emilio Satoshi Hara Masahiro Okada Yu Yang Jiao Takayoshi Nakano Akira Sasaki Takuya matsumoto Department of Biomaterials Okayama University Graduate School of MedicineDentistry and Pharmaceutical SciencesOkayama 700-8558Japan Department of Maxillofacial Surgery Okayama University Graduate School of MedicineDentistry and Pharmaceutical SciencesOkayama 700-8558Japan Division of Materials&Manufacturing Science Osaka UniversityOsaka 565-0871Japan

The extracellular matrix of trabecular bone has a large surface exposed to the bone marrow and plays important roles such as hematopoietic stem cell niche formation and *** vitro reproduction of trabecular bone microenvironment would be valuable not only for developing a functional scaffold for bone marrow tissue engineering but also for understanding its biological ***,we analyzed and reproduced the initial stages of trabecular bone formation in mouse femur *** identified that the trabecular bone formation progressed through the following steps:(i)partial rupture of hypertrophic chondrocytes;(ii)calcospherite formation on cell membrane nano fragments(CNFs)derived from the ruptured cells;and(iii)calcospherite growth and fusion to form the initial three-dimensional(3D)structure of trabecular *** reproducing the initial trabecular bone formation in vitro,we collected CNFs from cultured cells and used as nucleation sites for biomimetic calcospherite ***,almost the same 3D structure of the initial trabecular bone could be obtained in vitro by using additional CNFs as a binder to fuse biomimetic calcospherites.

关键词： trabecular bone calcospherites cell membrane nano fragments three dimensionalization bone tissue synthesis

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Feminine wardrobe

Feminine wardrobe

A Contribution to Guy's Conjecture

作者： matsumoto Jinko.

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Acta Mathematica Sinica,English Series 2022年第10期38卷 1856-1886页

作者： Yukio matsumoto Yoshikazu MATSUTANI Angel MONTESINOS-AMILIBIA Masami ODA Shuichi OHKI Tsuyoshi SAKAI Department of Mathematics Gakushuin UniversityMejiroToshima-kuTokyo 171-8588Japan 3-21-1-901 Minamimachi KokubunjiTokyo 185-0021Japan Calle Rio Alberche 8.05260 CebrerosSpain Tsuda University 2-1-1Tsuda-choKodairaTokyo 187-8577Japan Tokyo Japanese Language Educational Center 3-22-7Kita ShinjukuShinjuku-kuTokyo 169-0074Japan Department of Mathematics College of Humanities and SciencesNihon UniversitySetagaya-kuTokyo 156-0045Japan

Let Kdenote the complete graph consisting of n vertices,every pair of which forms an *** want to know the least possible number of the intersections,when we draw the graph Kon the plane or on the sphere using continuous arcs for *** a paper published in 1960,Richard *** conjectured that the least possible number of the intersections is 1/64(n-1)^(2)(n-3)^(2) if n is odd,or 1/64 n(n-2)^(2)(n-4)if n is even.A virgin road V_(n)is a drawing of a Hamiltonian cycle in Kconsisting of n vertices and n edges such that no other edge-representing arcs cross V.A drawing of Kis called virginal if it contains a virgin *** drawings considered in this paper will be virginal with respect to a fixed virgin road *** will present a certain drawing of a subgraph of K,for each n(≥5),which is"characteristic"in the sense that any minimal virginal drawing of Kcontaining this subdrawing satisfies Guy’s conjecture.

关键词： Complete graph virginal drawing Guy’s conjecture

Dynamics of Secondary Large-Scale Structures in ETG Turbulence Simulations

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Plasma Science and Technology 2006年第1期8卷 110-113页

作者：李继全 Y.KISHIMOTO 董家齐 N.MIYATO T.matsumoto Southwestern Institute of Physics and SWIP-DUT Joint Lab for Fusion Plasma PhysicsChengdu 610041China Department of Fundamental Energy Kyoto University611-0011 GokashoUjiJapan Naka Fusion Research EstablishmentJAERINakaIbaraki 311-0193Japan Naka Fusion Research Establishment JAERINakaIbaraki 311-0193Japan

The dynamics of secondary large-scale structures in electron-temperature-gradient （ETG） turbulence is investigated based on gyrofluid simulations in sheared slab geometry. It is found that structural bifurcation to zonal flow dominated or streamer-like states depends on the spectral anisotropy of turbulent ETG fluctuation, which is governed by the magnetic shear. The turbulent electron transport is suppressed by enhanced zonal flows. However, it is still low even if the streamer is formed in ETG turbulence with strong shears. It is shown that the low transport may be related to the secondary excitation of poloidal long-wavelength mode due to the beat wave of the most unstable components or a modulation instability. This large-scale structure with a low frequency and a long wavelength may saturate, or at least contribute to the saturation of ETG fluctuations through a poloidal mode coupling. The result suggests a low fluctuation level in ETG turbulence.

关键词： large-scale structures ETG turbulence gyrofluid simulation tokamak

Minute signet ring cell carcinoma occurring in gastric hyperplastic polyp

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World Journal of Gastroenterology 2007年第43期13卷 5779-5780页

作者： Shoji Hirasaki Seiyuu Suzuki Hiromitsu Kanzaki Kohei Fujita Shuji Matsumura Eiji matsumoto Department of Internal Medicine Sumitomo Besshi Hospital 3-1 Ohji-cho Niihama 792-8543 Japan

We describe a 45-year-old woman with minute signet ring cell carcinoma occurring in a gastric hyperplastic polyp. A biopsy specimen obtained from the gastric hyperplastic polyp revealed signet ring cell carcinoma. Endoscopic mucosal resection (EMR) was performed to confirm the diagnosis. Histological examination of the EMR specimen revealed focal signet ring cell carcinoma in the hyperplastic polyp. There are few cases of gastric hyperplastic polyp associated with signet ring cell carcinoma.

关键词： Minute gastric cancer Signet ring cell Endoscopic mucosal resection

Multiseptate gallbladder with anomalous pancreaticobiliary ductal union: A case report

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World Journal of Gastroenterology 2005年第38期11卷 6066-6068页

作者： Takafumi Yamamoto Jun matsumoto Shinya Hashiguchi Atsumasa Yamaguchi Koro Sakoda Chiaki Taki Department of Endoscopy Departments of Internal Medicine Surgeryand Pathology Kagoshima Medical Association Hospital Kagoshima 890-0081 Japan

Multiseptate gallbladder, characterized by the presence of multiple septa dividing the gallbladder lumen, is a very extremely rare congenital anomaly of the gallbladder. On the other hand, anomalous pancreaticobiliary ductal union is also one of the congenital anomalous biliary diseases and thought to be related with choledochal cyst or biliary tract malignancies. In this paper, we describe a unique and first patient of multiseptate gallbladder with anomalous pancreaticobiliary ductal union and a review of the literature. To clarify more characters of the multiseptate gallbladder, examination of a larger patient population will be needed and further studies will be required.

关键词： Multiseptate gallbladder Anomalous pancreaticobiliary ductal union Congenital anomaly

LEADAT: a MATLAB-based program for lead-210 data analysis of sediment cores

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Acta Oceanologica Sinica 2006年第6期25卷 128-136页

作者： LU Xueqiang matsumoto Eiji Graduate School of Environmental Studies Nagoya University Nagoya 464 -8601 Japan Environmental Science （SGES） Tamaki Campus University of Auckland Private Bag 92019 Auckland New Zealand

The program described herein （LEADAT） serves to calculate sediment date and sedimentation rate using the ^210pb method for the studies of environmental processes and pollution history on a time scale of 100 - 150 a. The program written in MATLAB （ Version7.0） permits the user to select the principal models of ^210pb method, i. e. , the constant fluxes of sediment and lead-210 （ CF- SL） model, the constant flux of lead-210 （CFL） model, the constant initial concentration of lead-210 （CICL） model and the twolayer mixing （TLM） model. Although appropriate model selection is essentially based on understanding of the sedimentary processes, the pattern of the excess ^210pb profile is also helpful for model selection. The excess ^210pb profiles for two sediment cores collected from a brackish lake and an embayment respectively are used to demonstrate the application of the program. With a graphical user interface, the program can be easily executed. Not only ASCII but also graphical output can be generated by means of the program. Meanwhile, the code can be modified easily for extension.

关键词： Lead-210 method sediment dating sedimentation rate environmental change

Genetic analysis is helpful for the diagnosis of small bowel ulceration

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World Journal of Gastroenterology 2018年第28期24卷 3198-3200页

作者： Junji Umeno Takayuki matsumoto Atsushi Hirano Yuta Fuyuno Motohiro Esaki Department of Medicine and Clinical Science Graduate School of Medical SciencesKyushu UniversityFukuokaFukuoka 812-8582Japan Division of Gastroenterology Department of Internal MedicineFaculty of MedicineIwate Medical UniversityMoriokaIwate 020-8505Japan Department of Endoscopic Diagnostics and Therapeutics Saga University HospitalSaga 849-8501Japan

The widespread use of capsule endoscopy and balloonassisted endoscopy has provided easy access for detailed mucosal assessment of the small intestine. However, the diagnosis of rare small bowel diseases, such as cryptogenic multifocal ulcerous stenosing enteritis(CMUSE), remains difficult because clinical and morphological features of these diseases are obscure even for gastroenterologists. In an issue of this journal in 2017, Hwang et al reviewed and summarized clinical and radiographic features of 20 patients with an established diagnosis of CMUSE. Recently, recessive mutations in the PLA2G4A and SLCO2A1 genes have been shown to cause small intestinal diseases. The small bowel ulcers in each disease mimic those in the other and furthermore those found in nonsteroidal anti-inflammatory drug-induced enteropathy. These recent and novel findings suggest that a clinical diagnosis exclusively based on the characteristics of small bowel lesions is possibly imprecise. Genetic analyses seem to be inevitable for the diagnosis of rare small bowel disorders such as CMUSE.

关键词： cryptogenic multifocal ulcerous stenosing enteritis chronic nonspecific multiple ulcers of the small intestine chronic enteropathy associated with SLCO2A1 gene Crohn’s disease