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Regulation of hepatic function by brain neuropeptides

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World Journal of Gastroenterology 1998年第3期4卷 12-16页

作者： Masashi yoneda School of Medicine Hirosaki University Japan Postgraduate School Hirosaki University Japan University of California Los Angeles CA United States Second Department of Medicine Asahikawa Medical College Japan Department of Medicine Intl. Univ. of Health and Welfare Japan Japan. Society of Gastroenterology Japan Second Department of Medicine Asahikawa Medical College Asahikawa 078 Nishikagura 4-5-3 Japan

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关键词： liver/physiology thyrotropin releasing hormone corticotropin releasing factor neuropeptide Y central nervous system bombesin βendorphin DAlaMet enkepalinamide

Identification of Heat Transfer Coefficients by Use Conditions of Quenching Oil

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材料热处理学报 2004年第5期25卷 453-456页

作者： katsumi Ichitani Lubricants Research Laboratory Idemitsu Kosan Co. Ltd. Chiba Japan

Heat transfer coefficients of the quench medium are necessary for heat-treatment simulation. Cooling characteristics of quenching oil vary with kinds and usage greatly. Users are selecting oil solutions that come up to their desired hardness and quenching distortion requirements. In particular cooling performance rises by agitation and decompression. Therefore we identified a heat transfer coefficient by usage and kinds of quenching oil. Cooling characteristics are different greatly by a kind of quenching oil. A difference of a cooling characteristic by a kind of oil depends on a temperature range of a boiling stage and the maximum heat transfer coefficient mainly. On the other hand, in a convection stage, there are few changes in a boiling stage. Even if quenching oil temperature is changed, heat transfer coefficients do not change greatly. When quenching oil stirred, heat transfer coefficients of vapor blanket stage and a convection stage rise, but there are a few changes in a boiling stage. When quenching oil is decompressed a temperature range of a high heat transfer coefficient moves to the low temperature side. In addition, a heat transfer coefficient in a vapor blanket stage comes down. For precision improvement of heat-treatment simulation, it is important that the heat transfer coefficient is calculated in conformity to the on-site use reality.

关键词：传热系数淬火油热处理冷却曲线

Oxidation of antimony (Ⅲ) in soil by manganese (Ⅳ) oxide using X-ray absorption fine structure

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Journal of Environmental Sciences 2018年第11期30卷 31-37页

作者： Lei Fu katsumi Shozugawa Motoyuki Matsuo Graduate School of Arts and Sciences The University of Tokyo 3-8-1 Komaba Meguro-ku Tokyo 153-8902 Japan

The oxidation of antimony （Ⅲ） in soils was studied using X-ray absorption fine structure （XAFS） spectra. An andosol soft sample and artificial soil samples （SiO2 blended with iron （Ⅲ） hydroxide and manganese （Ⅳ） oxide） were used herein. After adding antimony （Ⅲ） oxide to all soil samples, the oxidation process was observed by recording the XAFS spectra of Sb K-edge, Fe Kedge, and Mn K-edge. The results indicated that manganese （Ⅳ） oxide played an important role in the oxidation of Sb（Ⅲ）; however iron （Ⅲ） hydroxide was not directly related to the reaction. During a 2-hr continuous Sb K-edge X-ray absorption near edge structure （XANES） measurement with an interval of I rain of one of the artificial soil samples （SiO2 ＋ MnO2 ＋ Sb2O3）, a pseudo-first-order reaction was determined with an average estimated rate of 0.52 ±0.04 hr-1. Compared to the lower oxidation rate of andosol, it is suggested that because of the low concentration of Mn（Ⅳ） in natural soils, the oxidation process of Sb（Ⅲ） might be relatively slow and require more time to convert Sb（Ⅲ） to Sb（V）.

关键词： Soil Antimony Oxidation Manganese (Ⅳ) oxide X-ray absorption fine structure (XAFS)

Wavefront control of subcycle vortex pulses via carrier-envelope-phase tailoring

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Light(Science & Applications) 2023年第12期12卷 2711-2722页

作者： Yu-Chieh Lin katsumi Midorikawa Yasuo Nabekawa Attosecond Science Research Team RIKEN Center for Advanced Photonics2-1 HirosawaWakoSaitama 351-0198Japan

The carrier-envelope phase(CEP)of an ultrashort laser pulse is becoming more crucial to specify the temporal characteristic of the pulse's electric field when the pulse duration becomes shorter and attains the subcycle regime;here,the pulse duration of the intensity envelope is shorter than one cycle period of the carrier field *** this subcycle pulse involves a structured wavefront as is contained in an optical vortex(OV)pulse,the CEP has an impact on not only the temporal but also the spatial characteristics owing to the spatiotemporal coupling in the structured optical ***,the direct observation of the spatial effect of the CEP control has not yet been *** this study,we report on the measurement and control of the spatial wavefront of a subcycle OV pulse by adjusting the *** generate subcycle OV pulses,an optical parametric amplifier delivering subcycle Gaussian pulses and a Sagnac interferometer as a mode converter were integrated and provided an adequate spectral *** pulse duration of the generated OV pulse was 4.7 fs at a carrier wavelength of 1.54μ*** confirm the wavefront control with the alteration of the CEP,we developed a novel f-2f interferometer that exhibited spiral fringes originating from the spatial interference between the subcycle OV pulse and the second harmonic of the subcycle Gaussian pulse producing a parabolic wavefront as a reference;this resulted in the successful observation of the rotation of spiral interference fringes during CEP manipulation.

关键词： interferometer amplifier cycle

Troubleshooting of reinterventions after stent-by-stent placement for malignant hilar biliary obstruction(with videos)

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Hepatobiliary & Pancreatic Diseases International 2022年第5期21卷 500-502页

作者： Tadahisa Inoue Rena Kitano Masashi yoneda Department of Gastroenterology Aichi Medical University1-1 YazakokarimataNagakuteAichi 480-1195Japan

To the Editor:Biliary drainage is essential for controlling cholangitis and/or jaundice in patients with malignant hilar biliary obstruction,and endoscopy is the first choice of approach due to its less *** unresectable cases,placement of self-expandable metal stents(SEMSs)has been recommended over that of plastic stents due to their longer patency,and bilateral placement is also recommended to achieve higher clinical success and patency rates[1].

关键词： obstruction malignant stent

Ultrasonic measurements of single-crystal gold under hydrostatic pressures up to 8 GPa in a Kawai-type multi-anvil apparatus

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Chinese Science Bulletin 2007年第12期52卷 1600-1606页

作者： SONG MaoShuang Akira yoneda Eiji ITO Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Institute for Study of the Earth Interior Okayama University Misasa Tottori-ken 683-0193 Japan

Ultrasonic measurements were conducted on single-crystal gold at ambient condition and hydrostatic pressures up to 8 GPa at room temperature in a Kawai-type multi-anvil apparatus. The P-wave velocities measured at high pressures were in good agreement with Daniels and Smith’s ultrasonic study. The three independent elastic constants of gold at ambient condition were determined to be C11=192.7 GPa, C12=162.9 GPa, and C44=42.4 GPa. On the basis of an analysis of previous elastic data and the present ultrasonic data, the pressure derivatives of three elastic constants were estimated to be C1 ′1= 7.12,C 1′2 = 6.24,and C4′4 = 1.82. The calculated values of isothermal bulk modulus (KT0) and its pressure derivatives ( KT ′0) are KT0 = 166.44 GPa and KT ′0= 6.56. This indicates that Anderson et al.’s model of equation of state of gold might underestimates pressure about 1 GPa at pressure around 23 GPa and ambient temperature. Our results explained the discrepancies among the models of equation of state of gold proposed previously.

关键词：单晶体黄金超声波测量高温高压实验流体静力学状态方程

Determination of ammonium on an integrated microchip with LED-induced fluorescence detection

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Journal of Environmental Sciences 2012年第3期24卷 564-570页

作者： Shuhua Xue katsumi Uchiyama Hai-fang Li Department of Chemistry Tsinghua UniversityBeijing 100084China College of Chemistry and Chemical Engineering Fuzhou UniversityFuzhou 350108China Department of Applied Chemistry Graduate School of Urban Environmental SciencesTokyo Metropolitan UniversityMinamiohsawaHachiojiTokyo 192-0364Japan

A simply fabricated microfluidic device integrated with a fluorescence detection system has been developed for on-line determination of ammonium in aqueous samples. A 365-nm light-emitting diode （LED） as an excitation source and a minor band pass filter were mounted into a polydimethylsiloxane （PDMS）-based microchip for the purpose of miniaturization of the entire analytical system. The ammonium sample reacted with o-phthaldialdehyde （OPA） on-chip with sodium sulfite as reducing reagent to produce a fluorescent isoindole derivative, which can emit fluorescence signal at about 425 nm when excited at 365 nm. Effects of pH, flow rate of solutions, concentrations of OPA-reagent, phosphate and sulfite salt were investigated. The calibration curve of ammonium in the range of 0.018- 1.8 μg/mL showed a good linear relationship with R2 = 0.9985, and the detection limit was （S /N = 3） 3.6 × 10 4 μg/mL. The relative standard deviation was 2.8% （n = 11） by calculating at 0.18 μg/mL ammonium for repeated detection. The system was applied to determine the ammonium concentration in rain and river waters, even extent to other analytes fluorescence detection by the presented device.

关键词： microfluidic chip light emitting diode o-phthaldialdehyde fluorescence ammonium

Natural purification effects in the river in consideration with domestic wastewater pollutant discharge reduction effects

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Journal of Environmental Sciences 2010年第6期22卷 892-897页

作者： Yoshiaki Tsuzuki Masato Fujii Yasuo Mochihara Kouki Matsuda Minoru yoneda Research Center for Coastal Lagoon Environments Shimane University Ministry of Land InfrastructureTransportation and Tourism Environmental Engineering Graduate School of EngineeringKyoto University

The first social experiment program in Japan to reduce domestic wastewater pollutant discharge by ＂soft interventions＂ in households has been conducted in the Yamato-gawa River drainage area since 2005. The Yamato-gawa River has been listed as one of the worst water quality rivers in Japan because of the larger annual average BOD. ＂Hard interventions＂ including deployment of wastewater treatment facilities and artificial installation of natural purification facilities in the river has been conducted in these years to improve river water quality. At the first Yamato-gawa River social experiment program （YR-SEP） in March 2005, BOD at the monitoring point near the river mouth decreased about 6% during the Program. Natural purification effect along the river was evaluated in this article with one-dimensional water quality model for the six river sections. Larger biological oxygen consumption rate, kb, was estimated in the sections with artificially installed natural purification facilities. The effect of ＂soft interventions＂ in households in the YR-SEP was estimated as 25% BOD decrease in the nearest monitoring point to the river mouth, when all the households participate in the Program and BOD discharge reduction rate with ＂soft interventions＂ in households was 40%.

关键词： Yamato-gawa River "soft interventions" in households one-dimensional water quality model

An EPR Study on Intramolecular Spin Exchange and Rotational Mobility of Nitroxides Linked by a Long-chain

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Chemical Research in Chinese Universities 1999年第2期15卷 82-89页

作者： Yoshimi Sueishi katsumi Noritake LIU Yingjin Department of Chemistry Faculty of ScienceOkayama UniversityTsushima Naka 311Okayama 7008530Japan

The effects of pressure and solvent on the intramolecular spin exchange of biradicals having two nitroxide fragments linked by a long flexible chain were studied by means of highpressure EPR *** was found that the intramolecular exchange interaction between nitroxides of biradical took place through the direct contact between *** analyzing the observed EPR spectra,we have estimated the ratio(in/out)value of the average lifetime of the radical fragments inside a cage(in)to that outside the cage(out).The in/out values decreased with decreasing temperature and increasing *** results suggest that the nearly cyclic conformation in a cage is favorable in ***,the rotational correlation time of individual nitroxide was estimated from the anisotropic EPR signal,and the information on the segmental motion of the nitroxide group in biradical was obtained.

关键词： EPR Spin exchange Pressure effect Rotational correlation time exchange, Pressure effect, Rotational correlation time