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High Yield Synthesis and Characterization of the Structural and Magnetic Properties of Crystalline ErCl_(3) Nanowires in Single-Walled Carbon Nanotube Templates

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Nano Research 2008年第2期1卷 152-157页

作者： Ryo kitaura Daisuke Ogawa keita kobayashi Takeshi Saito Satoshi Ohshima Tetsuya Nakamura Hirofumi yoshikawa kunio Awaga Hisanori Shinohara Department of Chemistry and Institute for Advanced Research Graduate School of ScienceNagoya UniversityNagoya 464-8602Japan Nanotube Research Center National Institute of Advanced Industrial Science and TechnologyTsukuba 305-8565Japan PRESTO JapanScience and Technology Agency4-1-8 Honcho kawaguchiSaitama 332-0012Japan Japan Synchrotron Radiation Research Institute Hyogo 679-5198Japan

Crystalline ErCl_(3) nanowires have been fabricated in single-walled carbon nanotubes(SWCNTs)with high yield(~90%),and the structural and magnetic properties of the resulting ErCl_(3) nanowires encapsulated in SWCNTs(ErCl_(3)@SWCNTs)*** under high temperature and vacuum using high quality SWCNTs results in a high fi lling-ratio of ErCl_(3) nanowires in the *** high fi lling-ratio of ErCl_(3) nanowires and the use of highly pure SWCNTs with only a small amount of residual Fe catalyst nanoparticles enabled us to observe the magnetic properties of ErCl_(3)@*** determination based on simulated annealing calculations and high-resolution transmission electron microscope(HRTEM)image simulations revealed that the structure of the ErCl_(3) nanowires is unusual with respect to the coordination environment of the Eu3+*** work opens up new possibilities to fabricate various metal complex nanowires with high yield and may also be of more general importance in understanding and exploring magnetic properties in low-dimensional magnetic systems.

关键词： Low-dimensional nanomaterials carbon nanotubes magnetic properties crystal structure transmission electron microscope

Direct cholangioscopy combined with doubleballoon enteroscope-assisted endoscopic retrograde cholangiopancreatography

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World Journal of Gastroenterology 2012年第28期18卷 3765-3769页

作者： Tatsuya koshitani Shogo Matsuda koji Takai Takayuki Motoyoshi Makoto Nishikata Yasuhide Yamashita Toshihiko kirishima Naomi Yoshinami Hiroyuki Shintani Toshikazu yoshikawa Department of Gastroenterology Kyoto City Hospital Kyoto 6048845 Japan Department of Molecular Gastroenterology and Hepatology Kyoto Prefectural University of Medicine Graduate School of Medical Science Kyoto 6028566 Japan

Double-balloon enteroscope (DBE)-assisted endoscopic retrograde cholangiopancreatography (ERCP) is an effective endoscopic approach for pancreatobiliary disorders in patients with altered gastrointestinal anatomy. Endoscopic interventions via DBE in these postoperative settings remain difficult because of the lack of an elevator and the use of extra-long ERCP accessories. Here, we report the usefulness of direct cholangioscopy with an ultra-slim gastroscope during DBE-assisted ERCP. Three patients with choledocholithiasis in postoperative settings (two patients after Billroth Ⅱ gastrojejunostomy and one patient after Roux-en-Y gastrojejunostomy) were treated. DBE was used to gain access to the papilla under carbon dioxide insufflation, and endoscopic sphincterotomy was performed with a conventional sphincterotome. For direct cholangioscopy, the enteroscope was exchanged for an ultra-slim gastroscope through an incision in the overtube, which was inserted directly into the bile duct. Direct cholangioscopy was used to extract retained bile duct stones in two cases and to confirm the complete clearance of stones in one case. Bile duct stones were eliminated with a 5-Fr basket catheter under direct visual control. No adverse events were noted in any of the three cases. Direct cholangioscopy with an ultra-slim gastroscope facilitates subsequent treatment within the bile duct. This procedure represents another potential option during DBE-assisted ERCP.

关键词：胃肠道胆管胆道内镜造影电子胃镜肠吻合术二氧化碳气

Hayabusa2’s superior solar conjunction mission operations: Planning and post-operation results

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Astrodynamics 2020年第4期4卷 265-288页

作者： Stefania Soldini Hiroshi Takeuchi Sho Taniguchi Shota kikuchi Yuto Takei Go Ono Masaya Nakano Takafumi Ohnishi Takanao Saiki Yuichi Tsuda Fuyuto Terui Naoko OgawaYuya MimasuTadateru Takahashi Atsushi Fujii Satoru Nakazawakent yoshikawa Yusuke Oki Chikako Hirose Hirotaka Sawada Tomohiro Yamaguchi Makoto yoshikawa Department of Mechanical Materials and Aerospace EngineeringUniversity of LiverpoolLiverpool L693BXUK Institute of Space and Astronautical Science Japan Aerospace Exploration AgencySagamihara 252-5210Japan Fujitsu Limited Tokyo 105-7123Japan Mitsubishi Electric Corporation Tokyo 100-8310Japan

In late 2018,the asteroid Ryugu was in the Sun's shadow during the superior solar conjunction *** the Sun-Earth-Ryugu angle decreased to below 3°,the Hayabusa2 spacecraft experienced 21 days of planned blackout in the Earth-probe communication *** was the first time a spacecraft had experienced solar conjunction while hovering around a minor *** the safety of the spacecraft,a low energy transfer trajectory named Ayu was designed in the Hill reference frame to increase its altitude from 20 to 110 *** trajectory was planned with the newly developed optNEAR tool and validated with real time *** article shows the results of the conjunction operation,from planning to fight data.

关键词： superior solar conjunction Hayabusa2 Ryugu hovering satellite mission operations

Diagnostic and therapeutic application of noncoding RNAs for hepatocellular carcinoma

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World Journal of Hepatology 2015年第1期7卷 1-6页

作者： Chikako Shibata Motoyuki Otsuka Takahiro kishikawa Motoko Ohno Takeshi yoshikawa Akemi Takata kazuhiko koike Department of Gastroenterology Graduate School of MedicineThe University of TokyoTokyo 113-8655Japan Japan Science and Technology Agency PRESTOKawaguchiSaitama 332-0012Japan

Micro RNAs(mi RNAs) are small,noncoding RNA molecules that regulate gene expression posttranscriptionally,targeting thousands of messenger RNAs. Long noncoding RNAs(lnc RNAs),another class of noncoding RNAs,have been determined to be also involved in transcription regulation and translation of target genes. Since deregulated expression levels or functions of miR NAs and lncR NAs in hepatocellular carcinoma(HCC) are frequently observed,clinical use of noncoding RNAs for novel diagnostic and therapeutic applications in the management of HCCs is highly and emergently e xpe c t e d. H e r e,we s ummar iz e r e c e nt f indings regarding deregulated mi RNAs and lnc RNAs for their potential clinical use as diagnostic and prognostic biomarkers of HCC. Specifically,we emphasize the deregulated expression levels of such noncoding RNAs in patients' sera as noninvasive biomarkers,a field that requires urgent improvement in the clinical surveillance of HCC. Since nucleotide-based strategies are being applied to clinical therapeutics,we further summarize clinical and preclinical trials using oligonucleotides involving the use of miR NAs and small interfering RNAs against HCC as novel therapeutics. Finally,we discuss current open questions,which must be clarified in the near future for realistic clinical applications of these new strategies.

关键词： MicroRNA Long noncoding RNA Hepatocellularcarcinoma Clinical trials Biomarker

Current role of ultrasound for the management of hepatocellular carcinoma

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World Journal of Gastroenterology 2008年第11期14卷 1710-1719页

作者： Hitoshi Maruyama Masaharu yoshikawa Osamu Yokosuka Department of Medicine and Clinical Oncology Chiba University Graduate School of Medicine 1-8-1InohanaChuou-kuChiba 260-8670Japan

Hepatocellular carcinoma(HCC)has a decisive influence on the prognosis of cirrhotic *** α-fetoprotein(AFP)is a known and specific tumor maker for HCC,it is not suitable for the screening and surveillance of HCC because of its poor predictive value and low *** use of imaging modalities is essential for the screening,diagnosis and treatment of ***(US)plays a major role among them,because it provides realtime and non-invasive observation by a simple and easy *** addition, US-guided needle puncture methods are frequently required for the diagnosis and/or treatment process of *** development of digital technology has led to the detection of blood flow by color Doppler US, and the sensitivity for detecting tumor vascularity has shown remarkable improvement with the introduction of microbubble contrast ***,near real- time 3-dimensional US images are now *** for the treatment of HCC,high intensity focused ultrasound (HIFU)was developed as a novel technology that provides a transcutaneous ablation effect without needle *** advancements in the US field have led to rapid progress in HCC management,and continuing advances are *** article reviews the current application of US for HCC in clinical practice.

关键词：肝细胞癌肝超声治疗方法

α-Glucosidase Inhibition by New Schiff Base Complexes of Zn(II)

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Open Journal of Inorganic Chemistry 2016年第2期6卷 114-124页

作者： Rie Miyazaki Hiroyuki Yasui Yutaka yoshikawa Department of Analytical and Bioinorganic Chemistry Kyoto Pharmaceutical University Kyoto Japan Department of Health Sports and Nutrition Faculty of Health and Welfare Kobe Women’s University Hyogo Japan

There are many reports that divalent alkaline earth, first-row transition metals, and Zn(II) ions have α-glucosidase inhibitory effects. Cu(II) and Zn(II) ions, in particular, have strong α-glucosidase inhibitory effects. Several Schiff bases also display α-glucosidase inhibitory effects. In this study, we focused on safe and highly effective complexes including Zn(II) ion. We prepared and characterized the Zn(II) complexes with four different Schiff bases (N-salicylidene-β-alanine (N-sβ), N-N’-bis (salicylidene) ethylenediamine (N-bsE), N, N’-bis (salicylidene)-phenylenediamine (N-bsP), and 1-[(2-dimethylaminoethylimino) methyl]naphtholate (DMN)) and investigated their α-glucosidase inhibitory effects in vitro, using α-glycosidases from Saccharomyces sp. and rat small intestine, and in vivo, using a sucrose tolerance test. The Zn(II) complexes with DMN showed the highest in vitro and in vivo α-glucosidase inhibitory effects in this study.

关键词： α-Glucosidase Inhibitory Effect Zn(II) Complexes Schiff Bases Diabetes Mellitus

Motion reconstruction of the small carry-on impactor aboard Hayabusa2

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Astrodynamics 2020年第4期4卷 289-308页

作者： Takanao Saiki Yuya Mimasu Yuto Takei Manabu Yamada Hirotaka Sawada k azunori Ogawa Naoko Ogawa Hiroshi Takeuchi Akira Miura Yuri Shimaki koji Wada Rie Honda Yasuhiro Yokota kei Shirai Naruhisa Sano Hirohito Ohtsuka Go Ono kent yoshikawa Shota kikuchi Chikako Hirose Yukio Yamamoto Takahiro Iwata Masahiko Arakawa Seiji Sugita Satoshi Tanaka Fuyuto Terui Makoto yoshikawa Satoru Nakazawa Sei-ichiro Watanabe Yuichi Tsuda Japan Aerospace Exploration Agency Sagamihara 252-5210Japan Chiba Institute of Technology Narashino 275-0016Japan kobe University K obe 657-8501Japan The Graduate University for Aduanced Studies Sagamihara 252-5210Japan kochi University Kochi 780-8520Japan IHI Aerospace Co. LtdTomioka 370-2398Japan The University of Tokyo Tokyo 113-0033Japan Nagoya University Nagoya 464-8601Japan

Subsurface exploration is one of the most ambitious scientific objectives of the Hayabusa2 mission.A small device called small carry-on impactor(SCI)was developed to create an artificial crater on the surface of asteroid *** enables us to sample subsurface materials,which will provide a window to the *** physical properties of the resulting crater are also useful for understanding the internal structure of *** understanding of the crater and ejecta properties,including the depth of excavation of subsurface materials,requires accurate information on impact *** particular,the impact angle is a critical factor because it greatly influences the size and shape of the *** April 5,2019,the Hayabusa2 spacecraft deployed the SCI at 500 m of altitude above the asteroid *** SCI gradually reduced its altitude,and it shot a 2 kg copper projectile into the asteroid 40 min after *** the position of the released SCI is essential for determining the impact *** study describes the motion reconstruction of the SCI based on the actual operation *** results indicate that the SCI was released with high accuracy.

关键词： small body exploration Hayabusa2 kinetic impact artificial crater motion reconstruction

Histopathogenesis of demyelinating encephalopathy on dogs with natural canine distemper

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Histopathogenesis of demyelinating encephalopathy on dogs wi...

A reconsideration on deep sea bed disposal of high level radiological wastes–a post-Fukushima reflection on sustainable nuclear energy in Japan

中国畜牧兽医学会兽医病理学分第12次暨中国动物病理生理...

作者： Takashi yoshikawa Department Veterinary Pathology School of Veteribary Medicine and Animal Scienceskitasato University35-1 Higashi-23 banchoTowada cityAomori 034- 8628Japan

Up to now, the pathogenesis of dimyelination in brain tissues has remained unclear, although a lot of studies about neuron and glia changes have been done extensively. To further investigate the relation of variety cell in brain tissue to demyelination, this experiment was performed on 12 dogs with canine distemper. To detect the lesions carefully the brain tissue was divided into three portions and eleven slices that were including cerebrum (four slices) , cerebral stem (five slices) and cerebellum (two slices) according to anatomical relation. The sections stained by HE were observed under light microscope. The sections (no, mild, moderate and severe demyelinatig tissues) were selected respectively and stained by immunohistochemistry. The results demonstrated that the disturbance of blood circulation mainly included congestion, edema, thrombus formation, and the occurrence of diffusive intravascular coagulation (DIC). Oli-godendrocytes were occurred metabolic disorders and apoptosis in demyelinating areas. With anti - CDV antigen staining astrocytes were often displayed as intense positive reaction. With anti - GFAP staining, the fibrous astrocytes were more intense positive reaction in acute, mild and moderate demyelinating area, apoptotic astrocytes were detected in lesion foci . Some ependymal cells were infected by CDV. A lot of inclusion bodies and apoptotic cells were revealed. A few of nervous cells were degeneration and shrunken with pyknotic nuclei. According to the results, it was considered that the demyelinating changes in brain tissues related mainly to the disturbance of circulation and metabolic disorder and apoptosis of ogliodendrocyles. On the whole, the causation of demyelination of brain tissues was a common active result by many factors, but not only one.

关键词： Histopathogenesis canine distemper astrocyte oligodendrocyte demyelinating encephalopathy

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A reconsideration on deep sea bed disposal of high level rad...