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Three dimensional microstructures of carbon deposition on Ni-YSZ anodes under polarization

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Journal of Energy Chemistry 2023年第12期87卷 359-367,I0010页

作者： Dongxu Cui Anna Sciazko Yosuke Komatsu Akiko Nakamura Toru Hara Shiliang Wu Rui Xiao naoki Shikazono Institute of Industrial Science The University of TokyoTokyo 153-8505Japan Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210018JiangsuChina National Institute for Materials Science Tsukuba 305-0047Japan

In the present study,two Ni/YSZ anodes with different volume ratios of Ni and YSZ,30:70 and 45:55 vol%,are operated in dry methane under open circuit and polarized ***-dimensional(3D)Ni/YSZ microstructures after carbon deposition are reconstructed by the focused ion beam-scanning electron microscopy(FIB-SEM)with the help of machine learning *** the reconstructed mircostructures,volume fraction,connectivity,three phase boundary(TPB)density,and tortuosity are *** addition,local carbon microstructures are quantitatively reconstructed,and the effect of polarization on carbon morphology is *** is demonstrated that Ni surface in the vicinity of active TPB near the electrolyte is free from carbon formation,while remaining Ni surface at some distances from TPB exhibits severe carbon *** average,total amount of carbon deposition is larger near the *** observations imply complex interplay between the electrochemical steam generation and methane cracking on Ni surface which take place very locally near the active TPB.

关键词： Solid oxide fuel cell Anode Carbon deposition Triple-phase boundary 3D reconstruction

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Nasogastric tube syndrome induced by an indwelling long intestinal tube

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World Journal of Gastroenterology 2016年第15期22卷 4057-4061页

作者： naoki Sano Masayoshi Yamamoto Kentaro Nagai Keiichi Yamada Nobuhiro Ohkohchi Department of Surgery Tsukuba Medical Center Hospital Department of Surgery and Organ Transplantation Faculty of Medicine University of Tsukuba

The nasogastric tube(NGT) has become a frequently used device to alleviate gastrointestinal symptoms. Nasogastric tube syndrome(NTS) is an uncommon but potentially life-threatening complication of an indwelling NGT. NTS is characterized by acute upper airway obstruction due to bilateral vocal cord paralysis. We report a case of a 76-year-old man with NTS, induced by an indwelling long intestinal tube. He was admitted to our hospital for treatment of sigmoid colon cancer. He underwent sigmoidectomy to release a bowel obstruction, and had a long intestinal tube inserted to decompress the intestinal tract. He presented acute dyspnea following prolonged intestinal intubation, and bronchoscopy showed bilateral vocal cord paralysis. The NGT was removed immediately, and tracheotomy was performed. The patient was finally discharged in a fully recovered state. NTS be considered in patients complaining of acute upper airway obstruction, not only with a NGT inserted but also with a long intestinal tube.

关键词： Nasogastric tube syndrome Nasogastric tube Long intestinal tube Acute upper airway obstruction Tracheotomy

Preparation of PLGA-collagen hybrid scaffolds with controlled pore structures for cartilage tissue engineering

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Progress in Natural Science:Materials International 2020年第5期30卷 642-650页

作者： Nur Rofiqoh Eviana Putri Xiuhui Wang Ying Chen Xiaomeng Li naoki Kawazoe Guoping Chen Research Center for Functional Materials National Institute for Materials Science Department of Materials Science and Engineering Graduate School of Pure and Applied Sciences University of Tsukuba Departement of Chemical Engineering Faculty of Engineering Universitas Gadjah Mada

Scaffolds used for cartilage tissue engineering should have high mechanical strength and well-controlled pore structure to provide suitable microenvironments for functional tissue regeneration. In this study, hybrid scaffolds which had open and interconnected pore structure and high mechanical property were prepared by hybridization of PLGA mesh and collagen using ice particulates as porogen templates. Embossing ice particulates template was used to form open pore structures on the scaffold surfaces. Free ice particulates were used to generate interconnected bulk pores in the scaffolds. Hybridization with PLGA mesh provided the scaffolds with high mechanical property. Bovine articular chondrocytes were cultured in the hybrid scaffolds. The unique pore structures facilitated the homogeneous distribution of chondrocytes and cartilaginous matrices throughout the scaffolds. Subcutaneous implantation demonstrated cartilage-like tissue regeneration. The hybrid scaffolds should have a high potential for cartilage tissue engineering.

关键词： Hybrid scaffolds Porous scaffolds PLGA Collagen Cartilage tissue engineering

Data-Driven Determinant-Based Greedy Under/Oversampling Vector Sensor Placement

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Computer Modeling in Engineering & Sciences 2021年第10期129卷 1-30页

作者： Yuji Saito Keigo Yamada naoki Kanda Kumi Nakai Takayuki Nagata Taku Nonomura Keisuke Asai Tohoku University SendaiMiyagi980-8579Japan

A vector-measurement-sensor-selection problem in the undersampled and oversampled cases is considered by extending the previous novel approaches:a greedy method based on D-optimality and a noise-robust greedy method in this *** of the vector-measurement-sensor selection of the greedy algorithms are proposed and applied to randomly generated systems and practical datasets of flowfields around the airfoil and global climates to reconstruct the full state given by the vector-sensor measurement.

关键词： Sparse sensor selection vector-sensor measurement

Does massive intraabdominal free gas require surgical intervention?

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World Journal of Gastroenterology 2016年第32期22卷 7383-7388页

作者： Tadashi Furihata Makoto Furihata Kunibumi Ishikawa Masato Kosaka naoki Satoh Keiichi Kubota Department of General Surgery Kyouwa Chuo Hospital Department of Gastroenterological Surgery Dokkyo Medical University

We describe a rare case of an 81-year-old man who presented with severe epigastralgia. A chest radiograph showed massive free gas bilaterally in the diaphragmatic spaces. Computed tomography(CT) scan also showed massive free gas in the peritoneal cavity with portal venous gas. We used a wait-andsee approach and carefully considered surgery again when the time was appropriate. The patient received conservative therapy with fasting, an intravenous infusion of antibiotics, and nasogastric intubation. The patient soon recovered and was able to start eating meals 4 d after treatment; thus, surgical intervention was avoided. Thereafter, colonoscopy examination showed pneumatosis cystoides intestinalis in the ascending colon. On retrospective review, CT scan demonstrated sporadic air-filled cysts in the ascending colon. The present case taught us a lesson: the presence of massive intraabdominal free gas with portal venous gas does not necessarily require surgical intervention. Pneumatosis cystoides intestinalis should be considered as a potential causative factor of free gas with portal venous gas when making the differential diagnosis.

关键词： Case reports Portal vein Pneumatosis cystoides intestinalis Colonoscopy General surgery

Impact of blanching pretreatment on the drying rate and energy consumption during far-infrared drying of Paprika(Capsicum annuum L.)

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Food Quality and Safety 2018年第2期2卷 97-103页

作者： Takahiro Orikasa naoki Ono Takashi Watanabe Yasumasa Ando Takeo Shiina Shoji Koide Faculty of Agriculture Iwate UniversityMorioka IARC Kenpoku Agricultural Research Institute KunoheIwate Food Research Institute NAROTsukubaIbaraki Graduate School of Horticulture Chiba UniversityMatsudoJapan

We incorporated a superheated steam blanching pretreatment step into a paprika drying process and compared the far-infrared(FIR)drying rates,hardness of the sample surfaces,cell membrane stabilities,and energy consumption of blanched and non-blanched *** average drying rate of blanched paprika samples during FIR drying was higher than that of non-blanched *** hardness and cell membrane stability of dried blanched samples were lower than those of non-blanched *** estimated that the softening of the sample surfaces and injury to the cell membranes caused the drying rate to *** total energy consumption of the FIR drying of paprika was reduced by approximately 30%by introducing the blanching *** findings contribute to the development of environmentally friendly FIR drying techniques for paprika.

关键词： blanching cell membrane stability,energy consumption far-infrared drying hardness.

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

Correlation between microstructures and macroscopic properties of nickel/ yttria-stabilized zirconia (Ni-YSZ) anodes: Meso-scale modeling and deep learning with convolutional neural networks

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Energy and AI 2022年第1期7卷 31-42页

作者： Xuhao Liu Shihao Zhou Zilin Yan Zheng Zhong naoki Shikazono Shotaro Hara School of Science Harbin Institute of TechnologyShenzhen518055China Institute of Industrial Science The University of TokyoTokyo153-8505Japan Department of Mechanical Engineering Faculty of EngineeringChiba Institute of TechnologyChiba275-0016Japan

A deep learning based homogenization framework is proposed to link the microstructures of porous nickel/yttriastabilized zirconia anodes in solid oxide fuel cells(SOFCs)to their effective macroscopic properties.A variety of microstructures are generated by the discrete element method and the meso‑scale kinetic Monte Carlo ***,the finite element method and the homogenization theory are used to calculate the effective elastic modulus(E),Poisson’s ratio(υ),shear modulus(G)and coefficient of thermal expansion(CTE)of representative volume *** addition,the triple-phase boundary length density(LTPB)is also *** convolutional neural network(CNN)based deep learning model is trained to find the potential relationship between the microstructures and the five effective macroscopic *** comparison between the ground truth and the predicted values of the new samples proves that the CNN model has an excellent predictive *** indicates that the CNN model could be used as an effective alternative to numerical simulations and homogenization because of its accurate and rapid prediction *** the deep learning-based homogenization framework could potentially accelerate the continuum modeling of SOFCs for microstructure optimization.

关键词： Solid oxide fuel cells Porous microstructure Anode Effective macroscopic properties Convolutional neural network

Degradation of dibromophenols by UV irradiation

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Journal of Environmental Sciences 2014年第6期26卷 1284-1288页

作者： Keiko Katayama-Hirayama naoki Toda Akihiko Tauchi Atsushi Fujioka Tetsuya Akitsu Hidehiro Kaneko Kimiaki Hirayama Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi 4-3-11 Takeda Kofu 400-8511 Japan Technology Development Division Toshiba Lighting and Technology Corporation Asahimachi 5-2-1 Imabari Ehime 794-8510 Japan

We examined the degradation of dibromophenols （DBPs）, i.e. 2,4-DBP, 2,6-DBP and 3,5-DBP by ultraviolet （UV） irradiation and estimated the relationship between degradability and molecular orbital properties of each dibromopbenol. The removal of DBPs under a UV lamp system was successfully performed in an aqueous solution. After 5 min of irradiation, the initial DBPs concentration of 20 mg/L was decreased to below 1 mg/L, and about 60% of bromide ion was released. A decrease in the concentration of dissolved organic carbon （DOC） suggested the mineralization of DBPs, The mineralization may occur after release of bromide ions because the decrease of DOC was slower than the release of bromide ions. The degradability of 3,5-DBP was slightly lower than 2,6-DBP and 2,4-DBE Molecular orbital calculation suggested that the electrophilic frontier density and the highest occupied molecular orbital （HOMO） energy may be related to the degradability of DBPs.

关键词： bromide ion dibromophenol DOC mineralization UV irration

维普期刊数据库