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Chemical Interpretation on the Multi-Stage Oxidation of Diethyl Ether

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Journal of Thermal Science 2023年第2期32卷 513-520页

作者： SAKAI Yasuyuki NAKAMURA Hisashi SUGITA Toru tezuka Takuya UYGUN Yasar Department of Mechanical Systems Engineering Ibaraki UniversityIbaraki 316-8511Japan Institute of Fluid Science Tohoku UniversityMiyagi 980-8577Japan Graduate School of Engineering Tohoku UniversityMiyagi 980-8579Japan Mathematics and Logistics Jacobs University BremenBremen 28759Germany

Multi-stage ignition and/or double NTC(negative temperature coefficient)behavior resulted from the low-temperature oxidation of ether compounds are still not clearly *** have investigated the oxidation mechanism of a stoichiometric DEE(diethyl ether)/air mixture by using a micro flow reactor with a controlled temperature profile to see the detail of low-temperature weak flame *** simulation was also performed to understand the chemical kinetics mechanism of observed weak flame *** measurement showed separated weak flame in the temperature range of 600 K-800 *** simulation also qualitatively reproduced this separated weak flame,and showed four peak of heat *** the reaction flow analysis,it was found that(1)O-O bond scission reaction of keto-hydroperoxide produced by DEE,(2)O-O bond scission reaction of CH3O2H,CH3CO3H,and C2H5O2H,(3)O-O bond scission reaction of H2O2,and(4)H+O2=O+OH are key chain branching reactions to explain the multi-stage oxidation.

关键词： diethyl ether micro flow reactor weak flame multi-stage oxidation reaction path

Mineralization of aqueous pentachlorophenolate by anodic contact glow discharge electrolysis

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Journal of Environmental Sciences 2011年第6期23卷 1044-1049页

作者： Haiming Yang Meguru tezuka Graduate School of Engineering Saitama Institute of Technology Fusaiji Fukaya Saitama 369-0293 Japan School of Chemical Engineering University of Science and Technology Liaoning Anshan 114051 China

Exhaustive mineralization of pentachlorophenolate ion（PCP） in phosphate buffer was carried out using anodic contact glow discharge electrolysis（CGDE）,in which plasma was sustained between the electrolyte and *** CGDE,PCP degraded *** amount of total organic carbon decreased significantly,indicating the eventual conversion of the carbon atoms of benzene nucleus to inorganic ***,chlorine atoms in PCP were liberated as chloride *** a primary intermediate product,2,3,5,6tetrachloro-1,4-benzoquinone was detected,and oxalate and formate as byproducts were also *** was revealed that disappearance of PCP obeyed first-order *** reaction rate was generally unaffected by both O2 and inert gases in the cell,although it decreased by raising initial pH of *** addition,a plausible reaction pathway involving hydroxyl radical was proposed.

关键词： pentachlorophenol mineralization contact glow discharge electrolysis first-order rate law

Effects of Cr and Cr/Mn Combined Additions on Semi-Solid Microstructures of Al-Mg-Si Alloys Produced by D-SSF Process

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Journal of Materials Science & Technology 2008年第1期24卷 21-24页

作者： Witthaya Eidhed Hiroyasu tezuka Tatsuo Sato Faculty of Engineering King Mongkut's Institute of Technology North Bangkok Thailand Department of Metallurgy and Ceramic Sciences Tokyo Institute of Technology Japan

The effects of Cr and Cr/Mn combined additions on the semi-solid microstructure of wrought Al-Mg-Si alloys are *** the Cr-added alloy,the Al-7Cr compound is formed with homogeneously distributed in theα-Al matrix after *** of the Al-7Cr andα-Al-（12）Mn3-Si-2 dispersiod particles are found in the homogenized microstructure of the Cr/Mn-added *** the semi-solid microstructures,the smallestα-Al grains are obtained in the 60% cold-rolled *** prolonged holding time,theα-Al grain size of the Cr/Mn-added alloy is smaller than that of the Cr-added *** deformation by cold-rolling accelerates spheroidization of theα-Al *** D-SSF process is found to be useful to modify the microstructures of both the Cr-added and Cr/Mn-added Al-Mg-Si alloys.

关键词： D-SSF process Semi-solid processing Thixoforming AI-Mg-Si alloy

Topological Polymer Chemistry for Designing New Macromolecular Architectures

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复旦学报（自然科学版） 2005年第5期44卷 844-845页

作者： Y. tezuka Department of Organic and Polymeric Materials Tokyo Institute of Technology Tokyo 152-8552 Japan

The precise control in polymer architectures has been an ongoing challenge in synthetic polymer chemistry, since new polymer topologies will realize unprecedented properties and functions in polymeric *** particular, topologically unique macromolecules comprising single cyclic and multicyclic polymer units have gained growing interests due to their distinctive behaviors from linear and branched counterparts[1-4]. See Fig. 1.

关键词：遥爪聚合体拓扑结构静电自组合大分子结构合成方法

Fabrication of Co2Fe（Al,Si） and Co2Fe（Al,Si）/MgO on Ge（111） Substrate and Its Magnetic Properties

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Journal of Electronic Science and Technology 2019年第2期17卷 109-115页

作者： Kohei Kataoka Nobuki tezuka Masashi Matsuura Satoshi Sugimoto Graduate School of Engineering Tohoku University

We investigated the interfacial effects on magnetic properties in Co2Fe(Al,Si)/Ge (CFAS/Ge) and CFAS/MgO/Ge systems to demonstrate the effects of the interface structure on magnetic properties. CFAS and CFAS/MgO were deposited on the i-Ge(111) substrate. In-situ reflection high energy electron diffraction (RHEED) patterns showed epitaxially grown CFAS and MgO on Ge(111). According to the X-ray diffraction (XRD)φ-scan of CFAS(220), we determined that the crystallographic orientation relationships were CFAS(111)//Ge(111) and CFAS(111)//MgO(111) Ge(111). The magnetic properties were measured by the vibrating sample magnetometer (VSM) and the saturation magnetization Ms value of CFAS with 2-nm thick MgO reached the value of L21 ordered one. A uniaxial magnetic anisotropy behavior was observed both in CFAS/Ge and CFAS/MgO/Ge structures after annealing. We confirmed the behavior did not only originate from the CFAS/Ge interface but also CFAS/MgO and the ordering structure.

关键词： Co2Fe(Al,Si) full-heusler alloy magnetic anisotropy

Dispersoid Formation and Recrystallization Behavior in an Al-Mg-Si-Mn Alloy

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Journal of Materials Science & Technology 2010年第3期26卷 237-243页

作者： Rong Hu Tomo Ogura Hiroyasu tezuka Tatsuo Sato Qing Liu Department of Materials-Science and Engineering Tsinghua University Beijing 100084 China Department of Metallurgy and Ceramics Science Tokyo Institute of Technology Tokyo Japan

The nucleation and precipitation of Mn-containing dispersoids in an Al-Mg-Si-Mn alloy （6082） have been studied by optical microscopy,EPMA （electron probe microanalysis） and TEM （transmission electron microscopy）.The influence of Mn-containing dispersoids on the recrystallization behavior was also *** size and distribution of dispersoids were strongly affected by both the homogenization process and the alloying element distribution formed in the direct chill cast *** Mn-containing dispersoids were observed to nucleate preferentially on the β-Mg 2 Si phase and to be aligned along the 〈100〉 direction of the *** cold deformation,the morphology of dispersoids greatly influences the recrystallization and grain growth behavior in the annealing process.

关键词： Mn-containing dispersoids Homogenization Recrystallization Grain refinement

Potent water extracts of Indonesian medicinal plants against PTP1B

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Asian Pacific Journal of Tropical Biomedicine 2016年第1期6卷 38-43页

作者： Azis Saifudin Tepy Usia Subehan Ab Lallo Hiroyuki Morita Ken Tanaka Yasuhiro tezuka Faculty of Pharmacy Universitas Muhammadiyah Surakarta Research Center of National Drug and Food Control Faculty of Pharmacy Hasanuddin University Division of Natural Products Chemistry Institute of Natural Medicine University of Toyama Department of Pharmacognosy College of Pharmaceutical Science Ritsumeikan University Faculty of Pharmaceutical Sciences Hokuriku University

Objective:To examine the potent of water as a solvent agent in the preparation of traditional herbal ***:Water extracts of 18 plants were prepared through reflux and examined(25μg/mL) to evaluate their possibility for inhibiting protein tyrosine phosphatase 1B(PTP1B).The determination of IC50 values was performed for the samples possessing more than 80%***,those exhibiting IC50 values more than 7.0 μg/mL were further profiled for their chemical constituents through nuclear magnetic resonance(NMR) ***:About 44%(8) of the examined samples showed more than 80%inhibition against PTP1 *** water extracts of Elephantopus scaber,Helicteres isora aerial parts,Elaeocarpus grandiflorus(***) fruits,Melaleuca leucadendron leaves,and Quercus infectoria gum had IC50 values ranging from 2.05 to 6.90 μg/***,Andropogon nardus and Centella asiatica were at the area of δ 3.0-4.0 ***,the13 C NMR observation of samples possessing the most intensive signals in their proton NMR Cinnamomum burmannii and *** showed the peaks at the area of δ 60-90 ppm as the supportive evidence for sugar group ***,a disaccharide from *** could be an active inhibitor towards PTB1 ***:In contrast to the mainstream solvents currently used in modern herbal manufactures especially Jamu medicine in Indonesia,pure-water-extracted materials should be reconsidered and could be reemerged for future studies and for the manufacture of herbal *** addition,the activity of Jamu components should be confirmed that their antidiabetes and antiobesity activities could be through the inhibition of PTP1 B.

关键词： Water extract Indonesian medicinal plants PTP1B inhibitor Diabetes Carbohydrate Nuclear magnetic resonance

Pancreatic schwannoma:Case report and an updated 30-year review of the literature yielding 47 cases

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World Journal of Gastroenterology 2012年第13期18卷 1538-1544页

作者： Toshiyuki Moriya Wataru Kimura Ichiro Hirai Akiko Takeshita Koji tezuka Toshihiro Watanabe Masaomi Mizutani Akira Fuse First Department of Surgery Yamagata University Faculty of Medicine2-2-2 Iida-NishiYamagata 990-9585Japan

Pancreatic schwannomas are rare *** briefly describe a 64-year-old female patient with cystic pancreatic schwannoma mimicking other cystic tumors and review the *** for PubMed were searched for English-language articles from 1980 to 2010 using a list of keywords,as well as references from review *** 41 articles,including 47 cases,have been reported in the English *** mean age was 55.7 years(range 20-87 years),with 45%of patients being *** tumor size was 6.2 cm(range 1-20 cm).Tumor location was the head(40%),head and body(6%),body(21%),body and tail(15%),tail(4%),and uncinate process(13%).Thirty-four percent of patients exhibited solid tumors and 60%of patients exhibited cystic *** included pancreati-coduodenectomy(32%),distal pancreatectomy(21%),enucleation(15%),unresectable(4%),refused opera-tion(2%)and the detail of resection was not specified in 26%of *** patients died of disease with a mean follow-up of 15.7 mo(range 3-65 mo),although 5(11%)patients had a *** tumor size was significantly related to malignant tumor(13.8±6.2 cm for malignancy vs 5.5±4.4 cm for benign,P=0.001) and cystic formation(7.9±5.9 cm for cystic tumorvs 3.9 ±2.4 cm for solid tumor,P=0.005).The preoperative diagnosis of pancreatic schwannoma remains *** pancreatic schwannomas should be considered in the differential diagnosis of cystic neoplasms and *** our case,intraoperative frozen section confirmed the diagnosis of a *** enucleation may be adequate,if this is possible.

关键词：英文文献神经胰腺病例报告 PubMed数据库恶性肿瘤复习平均年龄

Evaluation of power market designs on investment incentives and capacity adequacy

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Engineering Sciences 2008年第2期6卷 61-68,77页

作者： Tetsuo tezuka Graduate School of Energy Science Kyoto University Kyoto 606-8501 Japan

Electricity industry restructuring should not sacrifice supply security to pursue economic efficiency. Till now there is no academic consensus on which electricity market design provides the least distorting investment incentives. Alternative approaches that have been adopted around the world for ensuring the appropriate level of investment in electric generation capacity are discussed, and much attention is devoted on the evaluation of capacity payment systems. The finding is that on one hand, capacity payment systems have good effect on reducing spot market price volatility and increasing the volume of generating capacity at the costs of relatively high total electricity prices; on the other hand, however, they are not robust against either the abuse of market power in the energy market or being manipulated.

关键词：发电能力电力市场投资设计奖励评价行业结构调整支付系统