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Pedunculated Brunner's gland hamartoma of the duodenum causing upper gastrointestinal hemorrhage

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World Journal of Gastroenterology 2009年第3期15卷 373-375页

作者： Shoji Hirasaki Motoharu Kubo atsushi Inoue Yasuyuki Miyake Hisako Oshiro Department of Internal Medicine Kubo HospitalImabari 7992116Japan

A case of pedunculated Brunner＇s gland hamartoma （BGH） of the duodenum causing upper gastrointestinal （GI） hemorrhage is reported. The patient was a 47-year-old man who visited our hospital for further evaluation of tarry stools and shortness of breath. Endoscopic examination of the upper digestive tract revealed a large peduncular polyp with bleeding, about 30 mm in diameter, arising from the wall of the second portion of the duodenum. GI bleeding occurred from the base of the stalk of the polyp. Endoscopic polypectomy was performed. Histological examination of the specimen revealed that the main body of the polyp contained several Iobules of mature Brunner＇s gland with areas of cystic dilatation. The surface epithelium consisted of normal duodenal mucosa with areas of focal ulceration. This polyp was diagnosed as a BGH. The symptom of tarry stools resolved after endoscopic resection. Our case shows that treatment is necessary for duodenal BGH if GI bleeding occurs.

关键词： Brunner's gland Hyperplasia Duodenalpolyp Endoscopic polypectomy Gastrointestinal bleeding

Jejunal small ectopic pancreas developing into jejunojejunal intussusception:A rare cause of ileus

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World Journal of Gastroenterology 2009年第31期15卷 3954-3956页

作者： Shoji Hirasaki Motoharu Kubo atsushi Inoue Yasuyuki Miyake Hisako Oshiro Division of Gastroenterology Kubo Hospital

Intussusception is rare in adults. We describe a 62-year-old man with jejunal ectopic pancreas that led to jejunojejunal intussusception and ileus. The patient was admitted to our hospital because of intermittent abdominal pain. Plain abdominal radiography showed some intestinal gas and fluid levels. Abdominal CT scan demonstrated a target sign suggesting bowel intussusception. Jejunography using a naso-jejunal tube showed an oval-shaped mass about 15 mm in diameter with a smooth surface in the jejunum, which suggested a submucosal tumor (SMT), and edematous mucosa around the mass. Partial jejunal resection was carried out and the resected oval-shaped tumor, 14 mm×11 mm in size, was found to be covered with normal jejunal mucosa. The tumor was histologically diagnosed as type ectopic pancreas according to the classification proposed by *** pain resolved *** case reminds us that jejunal ectopic pancreas should be included in the differential diagnosis of intussusception caused by an SMT in the intestine.

关键词： Jejunal submucosal tumor Small intestine Invagination Aberrant pancreas Surgery

Will the magnetic resonance imaging proton density fat fraction replace liver biopsy as the gold standard for detecting steatosis?

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Hepatobiliary Surgery and Nutrition 2018年第4期7卷 292-293页

作者： Masato Yoneda Kento Imajo atsushi Nakajima Department of Gastroenterology and Hepatology Yokohama City University Graduate School of Medicine Yokohama Japan

Accompanied with the ongoing epidemics of obesity and metabolic syndrome arising from the westernization of lifestyles, the incidence of nonalcoholic fatty liver disease (NAFLD) has been getting higher worldwide in th... 详细信息

关键词： liver NAFLD biopsy

Dynamics and hotspots of soil erosion and management scenarios of the Central Rift Valley of Ethiopia

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International Journal of Sediment Research 2012年第1期27卷 84-99页

作者： Derege Tsegaye MESHESHA atsushi TSUNEKAWA Mitsuru TSUBO Nigussie HAREGEWEYN Arid Land Research Center Tottori University Department of Land Resources Management and Environmental Protection Mekelle University

Most of the lowland in the central rift valley of Ethiopia is arid or semiarid and in degradation,with frequent occurrence of *** erosion by water during the rainy season is a serious problem in the region,leading to declining agricultural production,decreased food security,and a sedimentation risk for water ***,there has been no systematic study of this problem or of possible management *** meet this need,we analyzed soil erosion rates from 1973 to 2006, identified erosion hotspots,and proposed possible soil conservation *** assessed the soil loss dynamicity using the universal soil-loss equation and geographical information system software, considering the land use change at the following three periods:1973,1985 and *** characterized the watershed in terms of the erosion severity,topography,and land use to identify hotspots and proposed,modeled,and evaluated various watershed management scenarios to mitigate the *** erosion increased markedly from 1973 to 2006,with annual rates of 31,38,and 56 t ha"1 in 1973,1985,and 2006,respectively,as a result of vegetation degradation and particularly the conversion of thousands of hectares of forest or woodland into *** observed soil erosion rates are far from the tolerable rate of soil loss of the country and hence require urgent soil conservation interventions,especially in the hotspot *** proposed eight scenarios for reducing soil losses and evaluated their *** degraded land（using exclosures and planted vegetation） and installing stone erosion-control structures（stone bund） in cropland reduced the total soil loss by 12.6%and 63.8%,*** hotspot areas with annual soil loss of more than 20 t ha;by integrated management（erosion-control structures and exclosures） was the most effective approach,reducing soil loss by 87.8%.

关键词： Environmental rehabilitation Ethiopia Land degradation Soil conservation Soil erosion USLE model

Extraction studies of cobalt (Ⅱ) and nickel (Ⅱ) from chloride solution using PC88A

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中国有色金属学会会刊：英文版 2006年第3期16卷 687-692页

作者：罗琳魏建宏吴根义 F. TOYOHISA S. atsushi College of Resources and Environment Hunan Agricultural University Changsha 410128 China Graduate School of Engineering University of Tokyo Tokyo 113-8656 Japan Satellite Venture Business Laboratory Faculty of Engineering and Resource Science Akita University Akita 010-8 502 Japan

Solvent extraction study of cobalt and nickel were carried out from a chloride solution with a high ratio of Co to Ni using the sodium salt of PC88A as extractant diluted in kerosene. The solution was generated in batches by leaching a tungsten super alloy scraps. The results show that extraction rate of metal ions increases with increase of aqueous phase pH value. The pH0.5 value difference of 1.40 with PC88A indicates the possible separation of cobalt and nickel. Increase of the concentration of the solvent can enhance the percentage extraction of both metal ions. Improvement of temperature is beneficial to extraction separation of cobalt and nickel. Extraction and stripping processes were also studied in a cross-current solvent extraction unit and the results were also given.

关键词： PC-88A 钴镍溶剂萃取萃取剂

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Application of Polymerizable Surfactant in the Preparation of Polystyrene/Nano-Fe_3O_4 Composite

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Journal of Wuhan University of Technology(Materials Science) 2010年第2期25卷 184-187页

作者：李瑞雪赵建青 Hideyuki Otsuka atsushi Takahara College of Materials Science and Engineering South China University of Technology Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan

Monooctadecyl maleate, as a polymerizable surfactant, was synthesized by the mono-esterification of maleic anhydride and octadecanol, and was utilized to surface-modify nano-Fe3O4 particles. A polymerizable magnetic fluid was obtained by directly dispersing modified nano-Fe3O4 particles into styrene monomer, and the polystyrene/nano-Fe3O4 composite was prepared through free radical polymerization of polymerizable magnetic fluid. The structure and dispersion status in different dispersion phases of modified nano-Fe3O4 particles were studied by Fourier transform infrared （FTIR） spectrometry, X-ray diffraction （XRD） and transmission electron microscopy （TEM）, respectively. The experimental results show that the nano-Fe3O4 particles modified by monooctadecyl maleate with the size of about 7-10 nm can be uniformly dispersed into styrene and fixed in the composite during the procedure of polymerization. Thermogravimetric analysis （TGA） and vibrating sample magnetometry （VSM） indicate that the thermal stability of polystyrene/nano-Fe3O4 composite is improved compared to that of pure polystyrene, and the composite is a sort of superparamagnetic materials.

关键词： polymerizable surfactant nano-Fe3O4 particles polystyrene composite

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Fabrication and characterization of TiO2-based dye-sensitized solar cells

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Progress in Natural Science:Materials International 2011年第2期21卷 122-126页

作者： Takeo OKU Nariaki KAKUTA Kengo KOBAYASHI atsushi SUZUKI Kenji KIKUCHI Department of Materials Science The University of Shiga PrefectureShiga 522-8533Japan

Dye-sensitized solar cells TiO2with were *** phase composition and microstructures of the solar cells were examined by X-ray diffractometry and transmission electron microscopy,and the energy levels of the present solar cells were also *** results show that a solar cell mixed with xylenol orange and rose Bengal shows a higher conversion efficiency compared to solar cells with a single *** introduction of amorphous TiO2layers results in an improvement of the conversion efficiency.

关键词： solar cell TiO2 dye porphyrin microstructure

A Straight-bladed Vertical Axis Wind Turbine with a Directed Guide Vane Row-Effect of Guide Vane Geometry on the Performance-

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Journal of Thermal Science 2009年第1期18卷 54-57页

作者： Manabu TAKAO Hideki KUMA Takao MAEDA Yasunari KAMADA Michiaki OKI atsushi MINODA Department of Mechanical Engineering Matsue National College of Technology Department of Mechanical Engineering Mie University

The objective of this study is to show the effect of guide vane geometry on the performance. In order to overcome the disadvantages of vertical axis wind turbine, a straight-bladed vertical axis wind turbine （S-VAWT） with a directed guide vane row has been proposed and tested by the authors. According to previous studies, it was clarified that the performance of the turbine can be improved by means of the directed guide vane row. However, the guide vane geometry of S-VAWT has not been optimized so far. In order to clarify the effect of guide vanegeometry, the effects of setting angle and gap between rotor blade and guide vane on power coefticlent and start- ing characteristic were investigated in the experiments. The experimental study of the proposed wind turbine was carried out by a wind tunnel. The wind tunnel with a diameter of 1.8m is open jet type. The wind velocity is 8 m/s in the experiments. The rotor has three straight blades with a profile of NACA0018 and a chord length of 100 mm, a diameter of 0.6 m and a blade height of 0.7 m. The guide vane row consists of 3 arc plates.

关键词： fluid machinery wind energy vertical axis wind turbine guide vane

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彰显个性的设计

现代装饰 2024年第2期 84-93页

作者： atsushi Shindo The Long Confidence Rafi Ajl Lorenz Noelle Sarah Hossli Curve Lab Fredrik Paulse Vaarnii FEDERICO PERI BROKIS GERVASONI Tooy Marset Jaume Ramirez Dennismaass 舒禹(编译) 不详

这是一个很有趣的设计,一个垂直的圆柱体位立于几何形状的中心。除了现有摆置功能之外,设计师总设想物体还能有什么其他用途。至于容器中间的这个圆柱体的作用?设计师不知道答案,但又不想删除它。

关键词：彰显个性几何形状圆柱体设计师有趣