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Salt effects on formation of microcrystallites in poly(vinyl alcohol) gels prepared by cast-drying method

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Progress in Natural Science:Materials International 2011年第5期21卷 375-379页

作者： Shin KOMIYA Emiko OTSUKA Yumiko HIRASHIMA Atsushi suzuki Graduate School of Education Yokohama National University79-2 TokiwadaiHodogaya-kuYokohama240-8501 Japan Graduate School of Environment and Information Sciences Yokohama National University79-7 TokiwadaiHodogaya-kuYokohama240-8501 Japan Graduate School of Environment and Information Sciences、Yokohama National University 79-7 TokiwadaiHodogaya-kuYokohama240-8501 Japan

The preparation method of poly(vinyl alcohol)(PVA) gels by a simple cast-drying technique using salt solutions was reported in the present *** effects of the salt concentration on the macro- and microscopic properties were examined in detail,and the relationships between macroscopic properties,such as swelling ratio,mechanical strength,and the network microstaicture were *** was found that the swelling ratio of PVA cast gel increased largely by adding a small amount of salt, and decreased rapidly,hereafter it increased with increasing the salt concentration above 2%(mass fraction).The changes in the breaking stress and strain corresponded to the changes in the swelling *** macroscopic properties were found to be correlated with the microcrystallites and hydrogen bonds,which were characterized by the measurements using X-ray diffraction(XRD) and Fourier transform infrared spectroscopy(FT-IR).

关键词： poly(vinyl alcohol) phase separation microcrystallite hydrogen bond

Induction of antitumor immunity against mouse carcinoma by baculovirus-infected dendritic cells

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Cellular & Molecular Immunology 2010年第6期7卷 440-446页

作者： Tomoyuki suzuki Myint Oo Chang Masayuki Kitajima Hiroshi Takaku Department of Life and Environmental Sciences Chiba Institute of TechnologyChibaJapan High Technology Research Center Chiba Institute of TechnologyChibaJapan Immunology Program Benaroya Research InstituteSeattleWAUSA

A dendritic cell(DC)vaccine strategy has been developed as a new cancer immunotherapy,but the goal of complete tumor eradication has not yet been *** have previously shown that baculoviruses potently infect DCs and induce antitumor immunity against hepatomas in a mouse ***-infected,bone marrow-derived DCs(BMDCs)display increased surface expression of costimulatory molecules,such as CD80,CD86 and major histocompatibility complex(MHC)classes I and II,and secrete interferons and other proinflammatory *** this study,we evaluated the induction of antitumor immunity in mice by baculovirus-infected BMDCs against lung cancer and *** treatment with baculovirus-infected BMDCs,murine lung tumors caused by Lewis lung carcinoma(LLC)cells were significantly reduced in size,and the survival of the mice was *** addition,experiments using a melanoma mouse model showed that baculovirus-infected BMDCs inhibited tumor growth and improved survival compared with *** alanine aminotransferase(ALT),aspartate aminotransferase(AST)and creatinine levels remained normal in baculovirus-infected BMDC-treated *** findings show that baculovirus-infected DCs induce antitumor immunity and pave the way for the use of this technique as an effective tool for DC immunotherapy against malignancies.

关键词： dendritic cells natural killer cells T cells tumor Immunity

STATE SELECTED STUDY OF CHEMICAL REACTION DYNAMICS——SEPARATION OF IWO MICROSCOPIC MECHANSIMS OF THE REACTION MH++MH→MH2++M

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原子与分子物理学报 1991年第1期 1709-1712页

作者： Inosuke Koyano,Shinzo suzuki Institute for Molecular Science Myodaiji Okazaki 444 Japan Institute for Molecular Science Myodaiji Okazaki 444 Japan

We discuss the relation between the proton transfer andhydrogen atom abstraction reactions in the ion-moleculereactions of the general type MH++MH→MH2++M,based on the time-of-flight coincidence measurements ofthe MH2... 详细信息

关键词： SEPARATION OF IWO MICROSCOPIC MECHANSIMS OF THE REACTION MH STATE SELECTED STUDY OF CHEMICAL REACTION DYNAMICS

Reduction of Rejection Floor of Filter for Ultimate Spectral Efficiency in DWDM Systems

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光学学报 2003年第S1期23卷 548-549页

作者： Shuichi suzuki Yasuo Kokubun Yokohama National Univ. Graduate School of Eng. Dept. of Electr. & Comp. Eng. 79-5 Tokiwadai Hodogayaku Yokohama JAPAN 240-8501Yokohama National Univ. Graduate School of Eng. Dept. of Electr. & Comp. Eng. 79-5 Tokiwadai Hodogayaku Yokohama JAPAN 240-8501

The requirement of the rejection floor level in the wavelength filter was clarified to achieve the ultimate spectral efficiency in DWDM systems. A cascaded filter can satisfy this condition.

关键词： for of DWDM in

Improvement of solidification model and analysis of 3D channel blockage with MPS method

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Frontiers in Energy 2021年第4期15卷 946-958页

作者： Reo KAWAKAMI Xin LI Guangtao DUAN Akifumi YAMAJI Isamu SATO Tohru suzuki Cooperative Major in Nuclear Energy Graduate School and Advanced Science and EngineeringFaculty of Science and EngineeringWaseda University3-4-1 OkuboShinjuku-kuTokyo169-8555Japan Department of Nuclear Engineering and Management The University of Tokyo7-3-1 HongoBunkyo-kuTokyo113-8656Japan Department of Nuclear Safety Engineering Faculty of EngineeringTokyo City University1-28-1 TamazutsumiSetagaya-kuTokyo158-0087Japan

In a severe accident of a nuclear power reactor,coolant channel blockage by solidified molten core debris may significantly influence the core degradations that *** moving particle semi-implicit(MPS)method is one of the Lagrangian-based particle methods for analyzing incompressible *** the study described in this paper,a novel solidification model for analyzing melt flowing channel blockage with the MPS method has been developed,which is suitable to attain a sufficient numerical accuracy with a reasonable calculation *** prompt velocity diffusion by viscosity is prioritized over the prompt velocity correction by the pressure term(for assuring incompressibility)within each time step over the“mushy zone”(between the solidus and liquidus temperature)for accurate modeling of solidification before fixing the coordinates of the completely solidified *** sustain the numerical accuracy and stability,the corrective matrix and particle shifting techniques have been applied to correct the discretization errors from irregular particle arrangements and to recover the regular particle arrangements,*** validate the newly developed algorithm,2-D benchmark analyses are conducted for steady-state freezing of the water in a laminar flow between two parallel ***,3-D channel blockage analyses of a boiling water reactor(BWR)fuel support piece have been *** results show that a partial channel blockage develops from the vicinity of the speed limiter,which does not fully develop into a complete channel blockage,but still diverts the incoming melt flow that follows to the orifice region.

关键词： boiling water reactor(BWR) severe accident channel blockage moving particle semi-implicit(MPS)method solidification*

Experimental investigation on effective aerosol scavenging using different spray configurations with pre-injection of water mist for Fukushima Daiichi decommissioning

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Nuclear Science and Techniques 2024年第5期35卷 154-172页

作者： Rui-Cong Xu Avadhesh Kumar Sharma Erdal Ozdemir Shuichiro Miwa Shunichi suzuki Department of Nuclear Engineering and Management The University of Tokyo7‑3‑1 HongoBunkyo‑KuTokyo 113‑8656Japan Nuclear Professional School The University of Tokyo2‑2

During the decommissioning of the Fukushima Daiichi nuclear power plant,it is important to consider the retrieval of resolidified debris both in air and underwater *** the subsequent retrieval of debris from the reactor building,the resolidified debris must be cut into smaller pieces using various cutting *** the cutting process,aerosol particles are expected to be generated at the submicron *** has been noted that such aerosols sizing within the Greenfield gap(0.1-1μm)are difficult to remove effectively using traditional spraying ***,to improve the aerosol removal efficiency of the spray system,a new aerosol agglomeration method was recently proposed,which involves injecting water mist to enlarge the sizes of the aerosol particles before removing them using water *** this study,a series of experiments were performed to clarify the proper spray configurations for effective aerosol scavenging and to improve the performance of the water *** experimental results showed that the spray flow rate and droplet characteristics are important factors for the aerosol-scavenging efficiency and performance of the water *** results obtained from this study will be helpful for the optimization of the spray system design for effective aerosol scavenging during the decommissioning of the Fukushima Daiichi plant.

关键词： Fukushima Daiichi decommissioning Aerosol scavenging Multiphase flow Spray system Aerosol-mist agglomeration

Towards a sustainable technology for production of extra-pure Ti metal:Electrolysis of sulfurized Ti(C,N)in molten CaCl_(2)

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International Journal of Minerals,Metallurgy and Materials 2020年第12期27卷 1635-1643页

作者： Eltefat Ahmadi Ryosuke O.suzuki Tatsuya Kikuchi Takumi Kaneko Yuta Yashima Division of Materials Science and Engineering Faculty of EngineeringHokkaido UniversitySapporo 060-8628Japan Japan Society for the Promotion of Science(JSPS) Tokyo 102-0083Japan

A new concept for producing highly pure Ti metal powder from ilmenite(FeTiO)_(3))is proposed in this *** nitride(TiN)or titanium oxycarbonitride(TiO_(x)C_(y)N_(z))could be synthesized in the first step via the simultaneous carbothermal reduction and nitridation(CTRN)of FeTiO3 to remove oxygen *** separate oxygen completely,high-quality TiS2 samples were then synthesized from TiN and TiC using S2 gas,and the clean sulfides were finally reduced toα-Ti powders with spherical morphology using electrolysis in molten CaCl_(2).Xray diffraction(XRD),scanning electron microscopy(SEM)in conjunction with energy-dispersive X-ray spectroscopy(EDS),and elemental LECO analysis were used to study the phases and microstructures of the sulfides and the electrochemically reduced *** Ti powder showed no carbon contamination and consisted of high-purity foil-like Ti sheets with very low oxygen,carbon,and nitrogen contents of less than 0.15 wt%O,0.02 wt%C,and 0.003 wt%N,*** quality of the Ti powder was much higher than that of the powder obtained using the conventional OS process(proposed by *** and ***)starting directly from the oxides.

关键词： titanium molten salt electrolysis sulfidation titanium oxycarbonitride ilmenite

Skeletal muscle generated from induced pluripotent stem cells-induction and application

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World Journal of Stem Cells 2017年第6期9卷 89-97页

作者： Yuko Miyagoe-suzuki Shin’ichi Takeda Department of Molecular Therapy National Institute of NeuroscienceNational Center of Neurology and PsychiatryKodairaTokyo 187-8502Japan

Human induced pluripotent stem cells(hiPS cells or hiPSCs) can be derived from cells of patients with severe muscle disease. If skeletal muscle induced from patientiPSCs shows disease-specific phenotypes, it can be useful for studying the disease pathogenesis and for drug development. On the other hand, human iPSCs from healthy donors or hereditary muscle diseaseiPSCs whose genomes are edited to express normal protein are expected to be a cell source for cell therapy. Several protocols for the derivation of skeletal muscle from human iPSCs have been reported to allow the development of efficient treatments for devastating muscle diseases. In 2017, the focus of research is shifting to another stage:(1) the establishment of mature myofibers that are suitable for study of the pathogenesis of muscle disease;(2) setting up a highthroughput drug screening system; and(3) the preparation of highly regenerative, non-oncogenic cells in large quantities for cell transplantation, etc.

关键词： Human induced pluripotent stem cells Skeletal muscle Transplantation Disease Modeling Muscle progenitors Muscular dystrophy MYOD

Changes of gastric ulcer bleeding in the metropolitan area of Japan

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World Journal of Gastroenterology 2019年第42期25卷 6342-6353页

作者： Yoko Kubosawa Hideki Mori Satoshi Kinoshita Yoshihiro Nakazato Ai Fujimoto Masahiro Kikuchi Toshihiro Nishizawa Masayuki suzuki Hidekazu suzuki Department of Gastroenterology National Hospital Organization Tokyo Medical CenterMeguroTokyo 152-8902Japan Division of Gastroenterology and Hepatology Department of Internal MedicineKeio University School of MedicineShinjukuTokyo 160-0016Japan Department of Clinical and Experimental Medicine Translational Research Center for Gastrointestinal Diseases(TARGID)University of LeuvenLeuven 3000Belgium Department of Gastroenterology Digestive Disease CenterInternational University of Health and WelfareMita HospitalMinatoTokyo 108-8329Japan Division of Gastroenterology and Hepatology Department of Internal MedicineTokai University School of MedicineIseharaKanagawa 259-1193Japan

BACKGROUND The two main causes of gastric ulcer bleeding are Helicobacter pylori(***)infection and ulcerogenic medicines,although the number of cases caused by each may vary with *** Japan,the rate of *** infection has fallen over the last decade and the number of prescriptions for non-steroidal anti-inflammatory drugs(NSAIDs)and antithrombotic drugs is increasing as the population *** of treatment for gastric ulcer bleeding have advanced with the advent of hemostatic forceps and potassium-competitive acid blocker(P-CAB).Thus,causes and treatments for gastric ulcer bleeding have changed over the last *** To examine the trends of gastric ulcer bleeding over 10 years in the metropolitan area of *** This is a single-center retrospective study.A total of 564 patients were enrolled from inpatients admitted to our hospital with gastric ulcer bleeding between 2006 and ***,medication history,*** infection,method of treatment,rate of rebleeding,and the length of hospitalization were *** associated with gastric ulcer bleeding were evaluated using Fisher’s exact test,Pearson’s Chi-squared test or Student’s t-test as *** Jonckheere-Terpstra test was used to evaluate trends.A per-protocol analysis was used to examine the rate of *** *** There was a significant increase in the mean age over time(P<0.01).The rate of *** infection tended to decrease over the study period(P=0.10),whereas the proportion of patients taking antithrombotic agents or NSAIDs tended to increase(P=0.07).Over time,the use of NSAIDs and antithrombotic drugs increased with *** contrast,the rate of *** infection during the study period fell with ***-induced ulcers accounted for the majority of cases in younger patients(<70 years old);however,the rate decreased with age(P<0.01).The method of treatment trend has changed significantly over *** main method of endoscopic hemostasis has changed from

关键词： Helicobacter pylori infection Gastric ulcer bleeding Non-steroidal antiinflammatory drugs Antithrombotic agents