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Structural changes concurrent with ferromagnetic transition

Chinese Physics B 2013年第4期22卷 1-16页

作者：杨森鲍慧新周超王宇任晓兵宋晓平 Yoshitaka Matsushita Yoshio Katsuya masahiko tanaka Keisuke Kobayashi Frontier Institute of Science and Technology MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Ferroic Physics Group National Institute for Materials Science National Institute for Materials Science Beamline BL15XU Spring-8 1-1-1 Kohto Sayo-cho Hyogo 679-5148 Japan

Ferromagnetic transition has generally been considered to involve only an ordering of magnetic moment with no change in the host crystal structure or symmetry, as evidenced by a wealth of crystal structure data from conventional X-ray diffractometry （XRD）. However, the existence of magnetostriction in all known ferromagnetic systems indicates that the magnetic moment is coupled to the crystal lattice; hence there is a possibility that magnetic ordering may cause a change in crystal structure. With the development of high-resolution synchrotron XRD, more and more magnetic transitions have been found to be accompanied by simultaneous structural changes. In this article, we review our recent progress in understand- ing the structural change at a ferromagnetic transition, including synchrotron XRD evidence of structural changes at the ferromagnetic transition, a phenomenological theory of crystal structure changes accompanying ferromagnetic transitions, new insight into magnetic morphotropic phase boundaries （MPB） and so on. Two intriguing implications of non-centric symmetry in the ferromagnetic phase and the first-order nature of ferromagnetic transition are also discussed here. In short, this review is intended to give a self-consistent and logical account of structural change occurring simultaneously with a ferromagnetic transition, which may provide new insight for developing highly magneto-responsive materials.

关键词： ferromagnetic transition crystal structure morphotropic phase boundary (MPB) magnetostriction multiferroicity

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Increase in thermal stability of proteins adsorbed on biomass charcoal powder prepared from plant biomass wastes

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Journal of Biomedical Science and Engineering 2011年第11期4卷 692-698页

作者： Hidetaka Noritomi Ryotaro Kai Daiki Iwai Hirotaka tanaka Reo Kamiya masahiko tanaka Kohichiroh Muneki Satoru Kato 不详

Thermal stability of lysozyme adsorbed on biomass charcoal powder (BCP), which was prepared from plant biomass wastes such as dumped adzuki bean, bamboo, and wood by pyrolysis without combustion under nitrogen atmosphere and comminution with a jet mill, was examined. Adsorbing lysozyme on BCP could sufficiently prevent proteins from denaturing and aggregating in an aqueous solution at high temperatures, and enhanced the refolding of thermally denatured proteins by cooling treatment. The remaining activities of lysozyme adsorbed on BCP of adzuki bean exhibited 51% by cooling treatment after the heat treatment at 90?C for 30 min, although that of native lysozyme was almost lost under the same experimental conditions. The thermostabilization effect of BCP on the remaining activity of adsorbed lysozyme was markedly dependent upon the kind of plant biomass wastes.

关键词： Adsorption Biomass Charcoal Powder Lysozyme Refolding Remaining Activity Thermal Stability

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Immobilization of Lysozyme on Biomass Charcoal Powder Derived from Plant Biomass Wastes

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Journal of Biomaterials and Nanobiotechnology 2012年第4期3卷 446-451页

作者： Hidetaka Noritomi Reona Ishiyama Ryotaro Kai Daiki Iwai masahiko tanaka Satoru Kato Department of Applied Chemistry Tokyo Metropolitan University Tokyo Japan EEN Co. Ltd. Tokyo Japan

Biomass charcoal powder (BCP) was used as a carrier matrix for immobilization of chicken egg white lysozyme. BCP was derived from plant biomass wastes such as dumped adzuki beans by pyrolysis without combustion under nitrogen atmosphere and grinding with a jet mill. The amount of lysozyme immobilized on BCP of adzuki beans by adsorption was 11 μmol/g (0.16 g/g) at pH 7.0. The optimum pH values for free and immobilized lysozyme activities were 6.8 and 7.2, respectively. The optimum temperature for both free and immobilized lysozyme activities was 25℃. The half-life of immobilized lysozyme exhibited 1.8-fold compared to that of free lysozyme at 5℃. Moreover, the half life of immobilized lysozyme was 7 times greater than that of lysozyme at 90℃.

关键词： Immobilization Biomass Charcoal Powder Lysozyme Activity Stability

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Thermostability of lysozyme immobilized on biomass charcoal powder

Thermostability of lysozyme immobilized on biomass charcoal ...

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The 12th Japan-China-Korea Joint Symposium on Enzyme Engineering

作者： Hidetaka Noritomi Ryotaro Kai masahiko tanaka Satoru Kato Department of Applied Chemistry Tokyo Metropolitan University

＜正＞Introduction Proteins are biomolecules of great importance in the medical,pharmaceutical,and food fields,since they exhibit their outstanding biological activities under mild ***,most of proteins dissolved in an aqueous solution are immediately denatured and inactivated at high *** particular,an aggregation of denatured proteins becomes the major problem because of the fast irreversible

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Development of "Real-Time" Navigation System Updated with Intraoperative MR Imaging for Total Removal of Glioma

Development of "Real-Time" Navigation System Updated with In...

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The 6th International Conference on Biomedical Engineering and Rehabilitation Engineering

作者： Yoshihiro Muragaki Iseki Hiroshi Takashi Maruyama masahiko tanaka Osami Kubo Kintomo Takakura Tomokatsu Hori Department of Neurosurgery Neurological InstituteTokyo Women’s Medical University.8-1 Kawada-cho Shinjuku-ku Tokyo 162-8666 Department of Neurosurgery Neurological InstituteTokyo Women’s Medical University.8-1 Kawada-cho Shinjuku-ku Tokyo 162-8666 Department of Neurosurgery Neurological InstituteTokyo Women’s Medical University.8-1 Kawada-cho Shinjuku-ku Tokyo 162-8666 Department of Neurosurgery Neurological InstituteTokyo Women’s Medical University.8-1 Kawada-cho Shinjuku-ku Tokyo 162-8666 Department of Neurosurgery Neurological InstituteTokyo Women’s Medical University.8-1 Kawada-cho Shinjuku-ku Tokyo 162-8666 Department of Neurosurgery Neurological InstituteTokyo Women’s Medical University.8-1 Kawada-cho Shinjuku-ku Tokyo 162-8666 Department of Neurosurgery Neurological InstituteTokyo Women’s Medical University.8-1 Kawada-cho Shinjuku-ku Tokyo 162-8666

＜正＞ The extent of operative removal in glioma is statistically correlated with patient’sprognosis, however, its complex shape often cause incomplete removal. Various navigationsystems are not useful by becoming outdated for the brain shift. We report the developmentand initial experience of new "real-time" navigation system （RTnavi） updated with

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Exploiting fly models to investigate rare human neurological disorders

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Neural Regeneration Research 2025年第1期20卷 21-28页

作者： Tomomi tanaka Hyung-Lok Chung Department of Neurology Houston Methodist Research InstituteHoustonTXUSA Department of Neurology Weill Cornell Medical CollegeNew YorkNYUSA

Rare neurological diseases,while individually are rare,collectively impact millions globally,leading to diverse and often severe neurological *** attributed to genetic mutations that disrupt protein function or structure,understanding their genetic basis is crucial for accurate diagnosis and targeted *** investigate the underlying pathogenesis of these conditions,researchers often use non-mammalian model organisms,such as Drosophila(fruit flies),which is valued for their genetic manipulability,cost-efficiency,and preservation of genes and biological functions across evolutionary *** tools available in Drosophila,including CRISPR-Cas9,offer a means to manipulate gene expression,allowing for a deep exploration of the genetic underpinnings of rare neurological *** boasts a versatile genetic toolkit,rapid generation turnover,and ease of large-scale experimentation,making it an invaluable resource for identifying potential drug *** can expose flies carrying disease-associated mutations to various compounds,rapidly pinpointing promising therapeutic agents for further investigation in mammalian models and,ultimately,clinical *** this comprehensive review,we explore rare neurological diseases where fly research has significantly contributed to our understanding of their genetic basis,pathophysiology,and potential therapeutic *** discuss rare diseases associated with both neuron-expressed and glial-expressed *** cases include mutations in CDK19 resulting in epilepsy and developmental delay,mutations in TIAM1 leading to a neurodevelopmental disorder with seizures and language delay,and mutations in IRF2BPL causing seizures,a neurodevelopmental disorder with regression,loss of speech,and abnormal *** we explore mutations in EMC1 related to cerebellar atrophy,visual impairment,psychomotor retardation,and gain-of-function mutations in ACOX1 causing Mitchell ***-of-fun

关键词： ACOX1 Drosophila melanogaster glia lipid metabolism model organisms neuroinflammation neurologic disorders neuron rare disease VLCFA

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Catalytic Asymmetric Carbon-Carbon Forming Reactions Catalyzed Chiral Schiff Base-Metal Complexes

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复旦学报（自然科学版） 2007年第5期46卷 573-574页

作者： Takanori tanaka masahiko Hayashi Department of Chemistry Graduate School of ScienceKobe University

1 Results In 1991, we disclosed the novel asymmetric catalysts prepared from chiral Schiff base and titanium alkoxide in the reaction of asymmetric silylcyanation of aldehydes (eq.1)[1]. Since our first report, chiral Schiff base-metal complex was proven to be efficient in a variety of asymmetric reactions. We reported the first example of enantioselective addition of diketene to aldehydes promoted by chiral Schiff base-titanium alkoxide complexes (eq.2)[2]. The products of this reaction have been cove...

关键词： asymmetric carbon-carbon forming reaction Schiff base dialkylzinc enantioselective reaction

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Effect of branched-chain amino acids in patients receiving intervention for hepatocellular carcinoma

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World Journal of Gastroenterology 2014年第10期20卷 2673-2680页

作者： Tomoaki Ishihara Motoh Iwasa Hideaki tanaka masahiko Kaito Jiro Ikoma Toshiya Shibata Yoshiyuki Takei Department of Gastroenterology and Hepatology Yokkaichi Digestive Disease Center Komono Mie 510-1232 Japan Department of Gastroenterology and Hepatology Mie University Graduate School of Medicine Tsu Mie 514-8507 Japan Department of Gastroenterology and Hepatology Mie Shokakinaika Tsu Mie 514-0062 Japan Department of Diagnostic Imaging and Nuclear Medicine Kyoto University Graduate School of MedicineKyoto 606-8507 Japan

AIM: To investigate the usefulness of branched-chain amino acids (BCAA) before transarterial chemoembolization (TACE) or radiofrequency ablation (RFA).

关键词： Branched-chain amino acids Cirrhosis Hepatocellular carcinoma Transarterial chemoembolization Radiofrequency ablation Hypoalbuminemia

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Coherent X-ray mirage: discovery and possible applications

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High Power Laser Science and Engineering 2014年第2期2卷 1-6页

作者： Tatiana Pikuz Anatoly Faenov Sergey Magnitskiy Nikolay Nagorskiy Momoko tanaka masahiko Ishino Masaharu Nishikino Yuji Fukuda Masaki Kando Yoshiaki Kato Tetsuya Kawachi Quantum Beam Science Directorate Japan Atomic Energy Agency Kizugawa Kyoto 619-0215 Japan Joint Institute for High Temperatures Russian Academy of Sciences Moscow 125412 Russia Institute for Academic Initiatives Osaka University International Laser Center of M.V. Lomonosov Moscow State University The Graduate School for the Creation of New Photonics Industries Hamamatsu Shizuoka 431-1202 Japan

In the far field of the intensity distribution of the beam delivered by a two-stage transient–collisional excitation X-ray laser(XRL), a non-expected interference pattern that is stable from shot to shot has been discovered. It is demonstrated that the interference is caused by the emergence of an imaginary source in the amplifying plasma, which is phase matched to the radiation of the generator. The observed phenomenon is called an X-ray coherent mirage. To explain the obtained results, a new theoretical approach is developed. The basic essential conditions for formation of the X-ray mirage are formulated, and possible applications are discussed. This paper details the experiments, including the formulation of the necessary and sufficient conditions for formation of the X-ray mirage, and possible applications are discussed.

关键词： coherent seeded beams mirage phase-matching X-ray lasers X-ray plasma optics

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Hepatitis B virus infection in Indonesia

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World Journal of Gastroenterology 2015年第38期21卷 10714-10720页

作者： Shoji Kubo Shigekazu Takemura Shogo tanaka Hiroji Shinkawa Takayoshi Nishioka Akinori Nozawa masahiko Kinoshita Genya Hamano Tokuji Ito Yorihisa Urata Department of Hepato-Biliary-Pancreatic Surgery Osaka City University Graduate School of Medicine

Approximately 240 million people are chronically infected with hepatitis B virus(HBV),75% of whom reside in Asia. Approximately 600000 of infected patients die each year due to HBV-related diseases or hepatocellular carcinoma(HCC). The endemicity of hepatitis surface antigen in Indonesia is intermediate to high with a geographical difference. The risk of HBV infection is high in hemodialysis(HD) patients,men having sex with men,and health care workers. Occult HBV infection has been detected in various groups such as blood donors,HD patients,and HIVinfected individuals and children. The most common HBV subgenotype in Indonesia is B3 followed by C1. Various novel subgenotypes of HBV have been identified throughout Indonesia,with the novel HBV subgenotypes C6-C16 and D6 being successfully isolated. Although a number of HBV subgenotypes have been discovered in Indonesia,genotyperelated pathogenicity has not yet been elucidated in detail. Therefore,genotype-related differences in the prognosis of liver disease and their effects on treatments need to be determined. A previous study conducted in Indonesia revealed that hepatic steatosis was associated with disease progression. Pre-S2 mutations and mutations at C1638 T and T1753 V in HBV/B3 have been associated with advanced liver diseases including HCC. However,drug resistance to lamivudine,which is prominent in Indonesia,remains obscure. Although the number of studies on HBV in Indonesia has been increasing,adequate databases on HBV infection are limited. We herein provided an overview of the epidemiology and clinical characteristics of HBV infection in Indonesia.

关键词： Hepatitis B virus Epidemiology Prevention Clinical

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