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Electron-Irradiation Induced Nanocrystallization of Pb（ll） in Silica Gels Prepared in High Magnetic Field

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Journal of Chemistry and Chemical Engineering 2015年第1期9卷 61-66页

作者： Takamasa Kaito Atsushi Mori chihiro Kaito Graduate School of Engineering Tokushima University Tokushima 770-8506 Japan Institute of Technology and Science Tokushima University Tokushima 770-8506 Japan Department of Nanophysics in Frontier Project Ritsumeikan University Shiga 535-8577 Japan

In a previous study, structure of silica gels prepared in a high magnetic field was investigated. While a direct application of such anisotropic silica gels is for an optical anisotropic medium possessing chemical resistance, we show here their possibility of medium in materials processing. In this direction, for example, silica hydrogels have so far been used as media of crystal growth. In this paper, as opposed to the soft-wet state, dried silica gels have been investigated. We have found that lead （II） nanocrystallites were formed induced by electron irradiation to lead （ll）-doped dried Hydrogels made from a sodium metasilicate solution doped with silica gels prepared in a high magnetic field such as B = 10 T. lead （II） acetate were prepared. The dried specimens were irradiated by electrons in a transmission electron microscope environment. Electron diffraction patterns indicated the crystallinity of lead （II） nanocrystallites depending on B. An advantage of this processing technique is that the crystallinity can be controlled through the strength of magnetic field B applied during gel preparation. Specific skills are not required to control the strength of magnetic field.

关键词： Silica gel magnetic field nanocrystallite electron irradiation.

Intra-abdominal ectopic bronchogenic cyst with a mucinous neoplasm harboring a GNAS mutation: A case report

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World Journal of Clinical Cases 2022年第24期10卷 8709-8717页

作者： Takashi Murakami Hiroaki Shimizu Kazuto Yamazaki Hiroyuki Nojima Akihiro Usui chihiro Kosugi KiyohikoShuto Shuntaro Obi Takahisa Sato Masato Yamazaki Keiji Koda Department of Surgery Teikyo University Chiba Medical CenterIchihara 299-0111ChibaJapan Department of Pathology Teikyo University Chiba Medical CenterIchihara 299-0111ChibaJapan Department of Internal Medicine Teikyo University Chiba Medical CenterIchihara 299-0111ChibaJapan

BACKGROUND Bronchogenic cysts are congenital cysts caused by abnormal sprouting from the ventral foregut during fetal *** usually occur in the mediastinum or lung,but there are very rare cases of ectopic bronchogenic cysts that develop in the abdominal cavity.A unique intra-abdominal ectopic bronchogenic cyst with a mucinous neoplasm that was producing carcinoembryonic antigen(CEA),harboring a GNAS mutation,is *** present case may contribute to clarifying the mechanism of tumorigenesis and malignant transformation of ectopic bronchogenic *** SUMMARY In 2007,a man in his 50s was incidentally found to have an intra-abdominal cystic mass,8 cm in *** resection was recommended,but he preferred to remain under *** 2020,his serum CEA level increased to 26.7 ng/mL,and abdominal computed tomography showed a 15 cm×12 cm,multifocal,cystic mass located predominantly on the lesser curvature of the *** malignancy could not be ruled out,he finally underwent surgical ***,the cystic wall was lined by ciliated columnar epithelium,accompanied by bronchial gland-like tissue,bronchial cartilage,and smooth *** of the cyst consisted of atypical columnar epithelium with an MIB-1 index of 5%and positive for ***,a GNAS mutation(p.R201C)was detected in the atypical epithelium,leading to a diagnosis of an ectopic bronchogenic cyst with a low-grade mucinous *** patient is currently undergoing outpatient follow-up without *** An extremely rare case of an abdominal bronchogenic cyst with a low-grade mucinous neoplasm harboring a GNAS mutation was reported.

关键词： Congenital,hereditary,and neonatal diseases and abnormalities Ectopic bronchogenic cyst Abdominal neoplasms GNAS mutation Carcinoembryonic antigen Case report

Synthesis of Branch-Type Cyclophane Tetramers Having a Multivalently Enhanced Guest-Binding Ability

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Advances in Chemical Engineering and Science 2019年第1期9卷 76-86页

作者： Osamu Hayashida chihiro Nada Shuhei Kusano Department of Chemistry Faculty of Science Fukuoka University Nanakuma Fukuoka Japan

A cationic branch-type cyclophane tetramer (1a) was synthesized by introducing three Boc-protected cyclophane derivatives into a N-acetylated tetraaza[6.***.6.1]paracy-clophane derivative as a core skeleton through DCC condensation, followed by removal of the external Boc-protecting groups. Cationic cyclophane tetramer 1a exhibited a high affinity toward an anionic and hydrophobic fluorescent guest, TNS, with binding constant of 4.8 × 105 M-1. This value of 1a was about 80-fold larger than that of the corresponding monomeric cyclophane for the identical guest, reflecting multivalent effect on the guest binding. As for electrostatic recognition, the obtained binding constant of 1a was one order of magnitude larger than that of an analogous anionic cyclophane tetramer (1b) for the identical guest. These enhanced guest-binding abilities of 1a were easily evaluated by fluorescence titration experiments.

关键词： Cyclophane Host-Guest Chemistry Multivalent Effect

Visualization of High-Speed Impact of Projectile in Granular Sheet with Destructive Collision of Particles

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Journal of Flow Control, Measurement & Visualization 2018年第3期6卷 136-151页

作者： chihiro Masaki Kojiro Suzuki Yasumasa Watanabe Department of Advanced Energy Graduate School of Frontier Sciences The University of Tokyo Kashiwa Japan Department of Aeronautics and Astronautics Graduate School of Engineering The University of Tokyo Tokyo Japan

The impact and penetration of a projectile in a particle-laden space, which are expected to have frequently occurred during the formation of the solar system and will occur in the case of an impact probe for future planetary exploration, were experimentally simulated by using the ballistic range. A two-dimensional sheet made from small glass beads or emery powder was formed by the free-falling device through a long slit in the test chamber evacuated down to about 35 Pa. A polycarbonate projectile of a hemi-sphere-cylinder or sphere shape with the mass and diameter about 4 g and 25 mm, respectively, was launched at the velocity up to 430 m/s, and the phenomena were observed by the high-speed camera at 20,000 fps. From a series of images, the bow-shock-wave-like laterally facing U-shaped pattern over the projectile and the absence of particles in the trail behind it were clearly seen. At the impact of the particles on the projectile surface, fine grains were formed due to the destructive collision and injected outward from the projectile. The images obtained by different lighting methods including the laser light sheet were compared. The effects of the particle diameter, its material and the impact velocity were also investigated.

关键词： Ballistic Range Impact Granular Flow Collision High-Speed Camera

Volvulus of the gall bladder diagnosed by ultrasonography,computed tomography,coronal magnetic resonance imaging and magnetic resonance cholangio-pancreatography

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World Journal of Gastroenterology 2006年第28期12卷 4599-4601页

作者： Nobuhisa Matsuhashi Shinichi Satake Kazunori Yawata Eri Asakawa Takashi Mizoguchi Masayuki Kanematsu Hiroshi Kondo Ichiro Yasuda Kenichi Nonaka chihiro Tanaka Atsushi Misao Shinji Ogura Department of Emergency and Disaster Medicine Gifu University1-1 Yanagido501-1194Gifu CityJapan Department of Radiology Gifu University1-1 Yanagido501-1194Gifu CityJapan Department of Gastroenterology Gifu University1-1 Yanagido501-1194Gifu CityJapan Department of Surgical Oncology Gifu University1-1 Yanagido501-1194Gifu CityJapan Department of Surgery Misao HospitalYotsuyachou500-8088Gifu CityJapan

A 54-year-old woman was admitted to our hospital with the complaint of right upper quadrant pain. Upon physical examination the vital signs of the patient were within normal ranges. Ultrasonography and computed tomography （CT） examination of the abdomen was obtained, which demonstrated a large dilatated cystic structure, measuring approximately 68.6 mm × 48.6 mm, with marked distension and inflammation. Additionally, the enhanced CT was characterized by the non-enhanced wall of the gallbladder. As the third examination in this study, magnetic resonance imaging （MRI）, namely coronal MRI and magnetic resonance cholangio-pancreatography （MRCP）, were performed. The MRCP demonstrated a dilatation of the gallbladder but detected no neck of the gallbladder. Simple cholecystectomy was performed. Macroscopic findings included a distended and gangrenous gallbladder, and closer examination revealed a counterclockwise torsion of 360 degrees on the gallbladder mesentery. Coronal MRI and MRCP showing characteristic radiography may be useful in making a definitive diagnosis.

关键词： Volvulus of the gallbladder Computed tomography Magnetic resonance imaging Magnetic resonance cholangio-pa ncreatography

A case of small bowel adenocarcinoma in a patient with Crohn’s disease detected by PET/CT and double-balloon enteroscopy

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World Journal of Gastroenterology 2009年第14期15卷 1774-1778页

作者： Chise Kodaira Satoshi Osawa chihiro Mochizuki Yoshihiko Sato Masafumi Nishino Takanori Yamada Yasuhiro Takayanagi Kosuke Takagaki Ken Sugimoto Shigeru Kanaoka Takahisa Furuta Mutsuhiro Ikuma First Department of Medicine Hamamatsu University School of Medicine 1-20-1 Handayama Higashi-ku Hamamatsu 431-3192 Japan Department of Gastroenterology Seirei Hamamatsu General Hospital 2-12-12 Sumiyoshi Naka-ku Hamamatsu 431-3192 Japan Molecular Diagnosis Hamamatsu University School of Medicine 1-20-1 Handayama Higashiku Hamamatsu 431-3192 Japan Center for Clinical Research Hamamatsu University School of Medicine 1-20-1 Handayama Higashiku Hamamatsu 431-3192 Japan

Small bowel adenocarcinoma (SBA) in patients with Crohn’s disease (CD) is quite rare, difficult to diagnose without surgery, and has a poor prognosis. Here, we report a 48-year-old man with SBA and a 21-year history of CD who was diagnosed by a combination of positron emission tomography/computed tomography (PET/CT) and double-balloon enteroscopy (DBE). Since the age of 27 years, the patient had been treated for ileal CD and was referred to our hospital with persistent melena. Multiple hepatic tumors were found by CT. PET/CT detected an accumulation spot in the small bowel. DBE revealed an ulcerative tumor in the ileum about 100 cm from the ileocecal valve. An endoscopic forceps biopsy specimen showed poorly differentiated adenocarcinoma. There were some longitudinal ulcer scars near the tumor, and the chronic inflammation inthe small bowel appeared to be associated with the cancer development. Previous reports suggest the risk of SBA in patients with CD is higher than in the overall population. Since early diagnosis is extremely difficult in these cases, novel techniques, such as PET/CT and DBE, may be expected to help in making a preoperative diagnosis of the development of SBA in CD.

关键词： Crohn's disease Double-balloon enteroscopy Positron emission tomography Small bowel adeno-carcinoma Surveillance

A Sensorless Rotor Position Detecting Method for Self-Controlled Synchronous Motors

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A Sensorless Rotor Position Detecting Method for Self-Contro...

第11届国际电机与系统学术会议

作者： chihiro Hasegawa Shoji Nishikata Department of Electrical and Electronic Engineering Tokyo Denki University

＜正＞A new sensorless rotor position detecting method for self-controlled synchronous motors is *** proposed method is based on the idea that the induced electromotive forces in the armature windings due to the pulsation included in the field current when a chopper is used as a field circuit depend on the rotor position of the *** principle of the proposed method is explained *** the usefulness of this method is discussed through experimental and simulated results when the motor is operated at a constant ***,an experimental investigation with the proposed sensorless rotor position detecting method at starting is discussed.

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农杆菌介导的玉米大斑病菌转化(英文)

菌物系统 2003年第3期22卷 374-379页

作者：周永力 TANAKA chihiro TSUDA Mitusya 中国农业科学院作物育种栽培研究所农业部遗传育种重点实验室北京100081 京都大学环境微生物实验室

采用玉米大斑病菌Exserohilum turcicum的无性菌丝作受体,建立了农杆菌Agrobacterium tumefaciens介导的转化方法。采用的载体为 pUR5750, 携有来源于质粒pAN71的潮霉素抗性选择标记。PCR分析表明T-DNA 插入到E. turcicum基因组中。

关键词： T-DNA,插入,潮霉素B,菌丝

玉米大斑病菌(Exserohilum turcicum)原生质体的分离及转化

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生物工程学报 2003年第3期19卷 364-367页

作者：周永力 TANAKA chihiro MATSUSHIMA Satoshi TSUDA Mitsuya 中国农业科学院作物育种栽培研究所农业部作物遗传育种重点开放实验室北京100081 京都大学环境微生物实验室京都6068502

玉米大斑病是严重危害玉米生产的一个世界性真菌病害。由于玉米大斑病菌 (Exserohilumturcicum)在无性生长过程中迅速产生黑色素 ,致使原生质体难以分离。测试了包括Fungase、Funcelase、Novozyme、Glucanex、Driselase、Uskizyme、Kita... 详细信息

玉米大斑病是严重危害玉米生产的一个世界性真菌病害。由于玉米大斑病菌 (Exserohilumturcicum)在无性生长过程中迅速产生黑色素 ,致使原生质体难以分离。测试了包括Fungase、Funcelase、Novozyme、Glucanex、Driselase、Uskizyme、Kitalase在内的 7种细胞壁降解酶及其组合、病原菌菌株和培养基对原生质体分离效果的影响。结果表明菌株的培养形态和菌丝的生长状态显著影响原生质体的分离效率 ;酶组合Kitalase +Glucanex +Driselase ,Kitalase+Glucanex和Kitalase +Uskizyme能够有效地分离玉米大斑病菌的原生质体。初步的转化试验表明 ,质粒pAN71可以用于该病原菌的转化。这些结果将为E .

关键词：原生质体提取转化玉米大斑病菌真菌