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Identification of sources of lead in the atmosphere by chemical speciation using X-ray absorption near-edge structure(XANES) spectroscopy

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Journal of Environmental Sciences 2014年第2期26卷 343-352页

作者： Kohei Sakata Aya Sakaguchi Masaharu Tanimizu Yuichi Takaku Yuka Yokoyama Yoshio takahashi Department of Earth and Planetary Systems Science Hiroshima University Kochi Institute for Core Sample Research Japan Agency for Marine-Earth Science and Technology Institute for Environmental Sciences

Sources of Pb pollution in the local atmosphere together with Pb species, major ions, and heavy metal concentrations in a size-fractionated aerosol sample from Higashi-Hiroshima （Japan） have been determined by X-ray absorption near-edge structure （XANES） spectroscopy, ion chromatography, and ICP-MS/AES, respectively. About 80% of total Pb was concentrated in fine aerosol particles. Lead species in the coarse aerosol particles were PbC204, 2PbCO3-Pb（OH）2, and Pb（NO3）2, whereas Pb species in the fine aerosol particles were PbC204, PbSO4, and Pb（NO3）2. Chemical speciation and abundance data suggested that the source of Pb in the fine aerosol particles was different from that of the coarse ones. The dominant sources of Pb in the fine aerosol particles were judged to be fly ash from a municipal solid waste incinerator and heavy oil combustion. For the coarse aerosol particles, road dust was considered to be the main Pb source. In addition to Pb species, elemental concentrations in the aerosols were also determined. The results suggested that Pb species in size-fractionated aerosols can be used to identify the origin of aerosol particles in the atmosphere as an alternative to Pb isotope ratio measurement.

关键词： lead lead speciation XAFS spectroscopy size-fractionated aerosol sample

Site-Pairing of Electron in Doped C_(60)

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Chinese Physics Letters 1995年第8期12卷 453-456页

作者： ZHANG Guoping FU Rongtang SUN Xin Y.takahashi T.D.Lee Laboratory and Department of Physics Fudan UniversityShanghai 200433 National Laboratory of Infrared Physics Shanghai 200083 Department of Material Science Fudan UniversityShanghai 200433 Department of Physics University of AlbertaEdmonton T6G 2J1Canada 不详

Going beyond both a simple perturbative theory and Hartree-Fock treatment,the Gutzwiller variational scheme is employed to clarify the possibility of electron site-pairing in doped C_(60).It is shown that this pairing can be induced by electron-phonon interaction rather than electron-electron *** results are supported by EPR experiments.

关键词： interaction. Electron Hartree

Experimental Studies on Thermal and Electrical Properties of Platinum Nanofilms

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Chinese Physics Letters 2006年第4期23卷 936-938页

作者：张兴张清光曹炳阳 FUJII Motoo takahashi Koji IKUTA Tatsuya Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Tsinghua University Beijing 100084 Institute for Materials Chemistry and Engineering Kyushu University Kasuga 816-8580 Japan Graduate School of Engineering Kyushu University Fukuoka 812-8581 Japan

We experimentally studied the in-plane thermal and electrical properties of a suspended platinum nanofilm in thickness of 15 nm. The measured results show that the in-plane thermal conductivity, the electrical conductivity and the resistance-temperature coefficient of the studied nanofilm are much less than those of the bulk material, while the Lorenz number is greater than the bulk value. Comparing with the results reported previously for the platinum nanofilm in thickness of 28 nm, we further find that the in-plane thermal conductivity, the electrical conductivity and the resistance-temperature coefficient decrease with the decreasing thickness of the nanotilm, while the Lorenz number increases with the decreasing thickness of the nanofilm. These results indicate that strong size effects exist on the in-plane thermal and electrical properties of platinum nanofilms.

关键词： TRANSPORT CONDUCTIVITY SUPERLATTICES PHONON

Neoadjuvant therapy for resectable pancreatic cancers

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Hepatobiliary Surgery and Nutrition 2022年第4期11卷 583-585页

作者： Yosuke Inoue Hiromichi Ito Yu takahashi Division of Hepato-Biliary-Pancreatic Surgery Cancer Institute HospitalJapanese Foundation for Cancer ResearchTokyoJapan

Pancreatic cancer(PC)is a potentially systemic disease with more diverse biology than generally *** present,surgical resection is the only curative therapy available for patients with PC,and its indications have long been discussed based on anatomical resectability.A recent consensus recommends neoadjuvant therapy(NAT)for anatomically borderline resectable(BR)cancers(1)as well as induction therapy for unresectable locally advanced(UR-LA)or metastatic(UR-M)cancers.

关键词： cancers therapy curative

NUMERICAL AND EXPERIMENTAL STUDY OF LURE MOVING IN WATER

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Transactions of Nanjing University of Aeronautics and Astronautics 2013年第3期30卷 257-259页

作者： Wataru Sekiguchi Naoya takahashi Shigeho Noda Ryutaro Himeno Graduate School of Engineering Tokyo Denki University Department of Engineering Tokyo Denki University Advanced Center for Computing and Communication

The motion of a lure in water is investigated experimentally and *** lure motion in water of apassing water tank is observed,and the periodic motion is *** the Fourier analysis,it is found that the frequency with the largest amplitude in the lateral direction depends on the lip width of the *** understand the lure dynamics,a numerical simulation of the flow field around the lure is *** shape is measured using an X-ray computer tomography and converted into a voxel *** visualization,it is found that vortex sheds from its lip correspond to the vibration frequency of the lure.

关键词： fishing lure passing water channel voxel model X-ray computer tomography computational fluid dynamics(CFD)

Russell body duodenitis in a patient with retroperitoneal metastasis of ureteral cancer

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World Journal of Gastroenterology 2013年第1期19卷 125-128页

作者： Yoshihisa takahashi Seiichiro Shimizu Koji Uraushihara Toshio Fukusato Department of Pathology Teikyo University School of MedicineTokyo 173-8605Japan Department of Pathology Showa General HospitalTokyo 187-8510Japan Department of Gastrointestinal Medicine Showa General HospitalTokyo 187-8510Japan

Russell bodies are globular and eosinophilic inclusion bodies in the cytoplasm of mature plasma *** cells whose cytoplasm is filled with Russell bodies are designated as Mott *** body duodenitis(RBD) is a unique form of chronic duodenitis that is characterized by infiltration of numerous Mott *** is very rare;only two cases have been reported to *** this paper,we report a case of RBD in a patient with retroperitoneal metastasis of ureteral cancer.A 77-year-old man was admitted to our hospital complaining of appetite loss,vomiting,and upper abdominal *** had undergone left nephroureterectomy for ureteral cancer 4 years *** digestive tract endoscopy revealed edema,stenosis,and punctate redness of the mucosa of the duodenum,and a biopsy was *** analysis showed that numerous Mott cells had infiltrated the lamina propria mucosae,and the condition was diagnosed as RBD.A mass lesion in the retroperitoneum adjacent to the duodenum was detected by abdominal computed tomography,and was diagnosed as metastatic urothelial carcinoma by *** is possible that chemokines produced by tumor cells caused RBD in this case.

关键词： Russell body Duodenitis Ureteral cancer Mott cells Plasma cells

Non-Fourier heat conduction study for steady states in metallic nanofilms

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Chinese Science Bulletin 2012年第24期57卷 3239-3243页

作者： WANG HaiDong LIU JinHui GUO ZengYuan takahashi Koji Key Laboratory for Thermal Science and Power Engineering of Ministry of Education School of AerospaceTsinghua UniversityBeijing 100084China Graduate School of Engineering Kyushu UniversityFukuoka 819-0395Japan

As a fundamental theory of heat transfer, Fourier's law is valid for most traditional conditions. Research interest in non-Fourier heat conditions is mainly focused on heat wave phenomena in non-steady states. Recently, the thermomass theory posited that, for steady states, non-Fourier heat conduction behavior could also be observed under ultra-high heat flux conditions at low ambient temperatures. Significantly, this is due to thermomass inertia. We report on heat conduction in metallic nanofilms from large currents at low temperatures; heat fluxes of more than 1×1010 W m 2 were used. The measured average temperature of the nanofilm is larger than that based on Fourier's law, with temperature differences increasing as heat flux increased and ambient temperature decreased. Experimental results for different film samples at different ambient temperatures reveal that non-Fourier behavior exists in metallic nanofilms in agreement with predictions from thermomass theory.

关键词：非傅立叶热传导非稳定状态纳米薄膜金属低环境温度 Fourier 傅立叶定律高热通量

Measurement of the Electron Bernstein Wave Emission with One of the Power Transmission Lines for ECH in LHD

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Plasma Science and Technology 2011年第4期13卷 405-409页

作者： Hiroe IGAMI Hiroshi IDEI Shin KUBO Yasuo YOSHIMURA Takashi SHIMOZUMA Hiromi takahashi National Institute for Fusion Science Research Institute for Applied Mechanics Kyushu University

Possibility of the measurement of radiated waves derived from the thermally emitted electron Bernstein wave （EBW） is numerically investigated based on the assumption of the super dense core （SDC） plasma generated in LHD. EBW that is thermally emitted in the electron cyclotron resonance （ECR） layer may couple with the electromagnetic wave and be emitted to the vacuum via the EBW-extraordinary-ordinary （B-X-O） mode conversion process. We consider the use of one of the transmission lines for electron cyclotron heating （ECH） in LHD as a receiving system of the emission. It is derived that the waves in the fundamental cyclotron frequency range are emitted as the EBW near their upper hybrid resonance （UHR） layer outside the last close flux surface （LCFS）. On the other hand, waves in the second harmonics cyclotron frequency range are emitted in the core region. It means that successful measurement of waves of the second harmonic frequency range emitted from extremely high dense core plasma with setting an aim angle for receiving indicates a possibility of the second harmonic ECH by EBW in the core region with setting the same aim angle and the same polarization for launching.

关键词： LHD electron cyclotron heating (ECH) electron Bernstein wave (EBW) high density plasma

Optimization of Nonlinear Vibration Characteristics for Seismic Isolation Rubber

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Computer Modeling in Engineering & Sciences 2017年第1期113卷 1-15页

作者： A.takahashi T.Shibata K.Motoyama K.Misaji Nihon University College of Industrial TechnologyDept.of Mathematical Information EngineeringJapan. Mississippi State University U.S.A.

A method for reducing the damage to a structure caused by an earthquake namely,using laminated rubber for seismic isolation is proposed,and the vibration characteristics of the rubber(which minimizes the seismic response of the structure during an earthquake)is optimized.A method called“Equivalent Linear System using Restoring Force Model of Power Function Type”(PFT-ELS)is applied to nonlinear vibration analysis of the *** that analysis,a building with 15 layers of the laminated rubber is *** seismic response of the building is analyzed,and the usefulness of the laminated rubber is demonstrated by comparing the seismic responses in the cases with and without the laminated *** addition,the hysteresis restoring-force characteristic of the laminated rubber,which minimizes the seismic response of the building,was optimized by using a genetic algorithm(GA).Based on these results,the optimum restoring-force characteristic for different earthquakes was *** a result,it was clarified that the developed optimization method can determine the vibration characteristics of the laminated rubber for minimizing the damage to the structure in the design phase.

关键词： Seismic-isolation laminated rubber high-rise-building structure PFT-ELS seismic-response analysis long-period earthquake