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Chinese Journal of Polymer Science 2008年第5期26卷 525-531页

作者： Bo-yong Xue Kenichi Ogata akinori toyota Graduate School of Engineering Tokyo University of Agriculture and Technology2-24-16 Naka-choKoganei-shiTokyo 184-8588Japan

Norbornene derivatives exo,endo-2-[2-(3,5-di-tert-butyl-4-hydroxyphenoxy)-acetoxy]methyl-5-norbornene(M1) and 3,3,5,5-tetramethyl-4-piperidinyl 5-norbornene-exo,endo-2-carboxylate(M2)were synthesized and polymerized by RuCl_2(=CHPh)(PCy_3)_2 to prepare a novel kind of bi-functional polymer bearing sterically hindered phenol(SHP)and hindered amine(HLAS)groups via ring-opening metathesis polymerization(ROMP).The resulting copolymers were characterized by gel permeation chromatography(GPC),~1H-NMR and differen...

关键词： Sterically hindered phenol Hindered amine Ring-opening metathesis polymerization(ROMP)

Stereoselective Total Synthesis of Mycalamides

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复旦学报（自然科学版） 2005年第5期44卷 813-814页

作者： Masahiro toyota Department of Chemistry Graduate School of Science Osaka Prefecture University Sakai Osaka 599-8531 Japan

Mycalamides A (1a) and B (1b) are potent antiviral compounds from a New Zealand sponge of the genus Mycale. Apart from their antitumor property, mycalamide A (1a) exhibits immunosuppressive action by blocking T-cell activation in mice and is significantly more potent than FK-506 and cyclosporine A. Because of their intriguing biological activity, unique structures and scarce supply of these natural products, mycalamides A (1a) and B (1b) have attracted considerable attention as target molecules for total synthesis, and total, formal, or partial syntheses of this family of compounds have been reported[1,2].

关键词：立体选择性微生物抗滤过性病原体抗癌抗菌素免役抑制

Performance Test and Flow Measurement of Contra-Rotating Axial Flow Pump

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Journal of Thermal Science 2007年第1期16卷 7-13页

作者： akinori Furukawa Toru Shigemitsu Satoshi Watanabe Division of Mechanical Engineering Science Kyushu University744 MotookaNishi-kuFukuoka 819-0395JAPAN

An application of contra-rotating rotors has been proposed against a demand for developing higher specific speed axial flow pump. In the present paper, the advantage and disadvantage of using contra-rotating rotors are described in comparison with conventional type of rotor-stator, based on theoretical and experimental investigations. The advantages are as follows：（1） The pump is inherently designed as smaller sized and at lower rotational speed. （2） A stable head-characteristic curve for flow rate with negative slope appears. （3） As the rear rotor rotational speed is varied as independent control of front rotor, the wider range of high performance operation is obtained by rear rotor speed control in addition to front rotor speed control. The disadvantages are as follows：（1） The structure of double shaft system becomes complex. （2） The pump performance is inferior at over flow rate as the rear rotor loading is weakened. （3） The blade rows interaction from rear rotor to front rotor more strongly appears. Then the rear rotor design is a key to achieve higher pump performance. Some methods to overcome these disadvantages will be discussed in more details toward wider usage of contra-rotating axial flow pump in various industrial fields.

关键词： axial flow pump contra-rotating rotors multiphase flow rotational speed control blade rows interaction

One-step phenol production from a water–toluene mixture using radio frequency in-liquid plasma

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Plasma Science and Technology 2017年第5期19卷 60-67页

作者： Muhammad AGUNG Shinfuku NOMURA Shinobu MUKASA Hiromichi toyota Otsuka KAZUHIKO Hidekazu GOTO Graduate School of Science and Engineering Ehime University Matsuyama 790-8577 Japan Faculty of Engineering Makassar State University Makassar 90-222 Indonesia Graduate School of Engineering Osaka University Suita 565-0871 Japan Author to whom any correspondence should be addressed.

The objectives of this research were to understand the process of converting toluene into phenol in a one-step process directly from a water–toluene mixture using the plasma in-liquid *** were conducted using 27.12 MHz radio frequency（RF） in-liquid plasma to decompose a solution of 30% toluene. Based on the experimental results as evaluated using gas chromatography–mass spectrometry（GC–MS）, along with additional analysis by the Gaussian calculation, density functional theory（DFT） hybrid exchange–correlational functional（B3LYP）and 6-311 G basis, the phenol generated from toluene was quantified including any *** the experiment, it was found that OH radicals from water molecules produced using RF inliquid plasma play a significant role in the chemical reaction with toluene. The experimental results suggest that phenol can be directly produced from a water–toluene mixture. The maximum phenol yields were 0.0013% and 0.0038% for irradiation times of 30s and 60s,respectively, at 120 W.

关键词： phenol toluene radio frequency in-liquid plasma Gaussian calculation

Characteristic of organic aerosol in a remote area of Okinawa Island

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Journal of Environmental Sciences 2009年第10期21卷 1371-1377页

作者： LUN Xiaoxiu TAKAMI akinori MIYOSHI Takao HATAKEYAMA Shiro Beijing Forestry University Beijing 100083 China National Institute for Environmental Studies Tsukuba 305-8506 Japan Tokyo University of Agriculture and Technology Tokyo 183-8538 Japan

A continuous investigation of aerosol pollutants in Cape Hedo, Japan was conducted from October 2005 to August 2006 by Aerodyne aerosol mass spectrometer （AMS）. This article focused on the analysis of long-range transport of organic aerosol from continental origin to the remote island. Based on the transport distance and air mass origin, four main air mass origins were considered, including North China, South China, Japan and Korea. Although the mass concentration and air mass origin were quite different during study period, the mass spectrum and size distribution of organic matter and oxidized organics were similar, which showed uni-modal distribution with modal diameter of around 500 nm. The loss rate of organics was （5.15 ± 0.55） × 10^-6 s^-1 obtained by plotting the concentration against the transport time. Conversion rate of SO2 to sulfate and oxidation rate of organics were （1.07 ± 0.15） × 10^-5 and （1.09 ± 0.52） × 10^-6 s^-1, respectively.

关键词： long-range transport Okinawa organics loss rate

Disruption of ectoplasmic specializations between Sertoli cells and maturing spermatids by anti-nectin-2 and anti-nectin-3 antibodies

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Asian Journal of Andrology 2008年第4期10卷 577-584页

作者： Yoshiro Toyama Fumie Suzuki-toyota Mamiko Maekawa Chizuru Ito Kiyotaka Toshimori Department of Anatomy and Developmental Biology Graduate School of Medicine Chiba University Chiba 260-8670Japan

Aim： To understand the biological functions of the ectoplasmic specializations between Sertoli cells and maturing spermatids in seminiferous epithelia. Methods： In order to disrupt the function of the ectoplasmic specializations, nectin-2, which is expressed at the specialization, was neutralized with anti-nectin-2 antibody micro-injected into the lumen of the mouse seminiferous tubule. Anti-nectin-3 antibody was also micro-injected into the lumen in order to neutralize nectin-3, which is expressed at the specialization. Results： The actin filaments at the specialization disappeared, and exfoliation of maturing spermatids was observed by electron microscopy. Conclusion： Nectin-2 was neutralized by anti-nectin-2 antibody and nectin-3 was neutralized by anti-nectin-3 antibody, respectively. Inactivated nectin-2 and nectin-3 disrupted the nectin-afadin-actin system, and finally the actin filaments disappeared. As a result, the specialization lost the holding function and detachment of spermatids was observed. One of the functions of the specialization seems to be to hold maturing spermatids until spermiation.

关键词： ectoplasmic specialization Sertoli cell spermatogenic cell testis actin nectin mice

Long-range transport of organic aerosol to Cape Hedo,Japan

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Particuology 2014年第2期12卷 35-41页

作者： Xiaoxiu Lun akinori Takami Weifang Ma Akio Shimono Shiro Hatakeyama Beijing Forestry University National Institute for Environmental Studies Onogawa 16-2Tsukuba 305-8506Japan Sanyu Plant Service Co. Ltd.Hashimotodai 1-8-21Kanagawa 229-1132Japan Tokyo University of Agriculture and Technology 3-8-IHarumi-choFuchu-shiTokyo 183-8538Japan

An investigation at Cape Hedo, Japan, from 2005 to 2006, focused on the long-range transport of organic aerosol （OA） from the Asian continent. An Aerodyne aerosol mass spectrometer was used to investigate the OA data collected over the study. OA concentrations were low from July to September and peaked during March and April. Based on air mass origins, four OA source regions were identified： northern China, southern China, Japan, and Korea. OA concentrations measured at Cape Hedo from the four sources did not exhibit large differences. Conversely, the frequencies of the air masses reaching Cape Hedo from the different regions varied considerably. Northern China was identified as the primary source of organic aerosols at Cape Hedo. Examination of variations in the ratio of m/z 44 to OA concentrations with transport time showed that OAs were partially oxidized during transport

关键词： Long-range transportOrganic aerosolSource contributionOkinawa

Pressure Measurement on Casing Wall and Blade Rows Interaction of Contra-Rotating Axial Flow Pump

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Journal of Thermal Science 2005年第2期14卷 142-149页

作者： Toru SHIGEMITSU Tomoya TAKANO akinori FURUKAWA Kusuo OKUMA Satoshi WATANABE Division of Mechanical Engineering Science Kyushu University 6-10-1HakozakiHigashi-kuFukuoka 812-8581JapanDivision of Mechanical Engineering Science Kyushu University6-10-1HakozakiHigashi-kuFukuoka 812-8581JapanDivision of Mechanical Engineering Science Kyushu University6-10-1HakozakiHigashi-kuFukuoka 812-8581JapanDivision of Mechanical Engineering Science Kyushu University6-10-1HakozakiHigashi-kuFukuoka 812-8581JapanDivision of Mechanical Engineering Science Kyushu University6-10-1HakozakiHigashi-kuFukuoka 812-8581Japan

An application of contra-rotating rotors has been proposed against a demand for developing higher specific speed axial flow pump. The blade rows interaction between front and rear rotors should be clarified for its stable operation and reduction of unsteady losses. In this paper, the static pressure distributions on casing wall are provided by measuring with the phase locked sampling method. The measurements are carried out for two types of the rear rotors with different blade number and chord length, and it is found that, for both types of rotors, the unsteady pressure fluctuations are more remarkable in the front rotor than in the rear rotor and they are caused by the rear rotor pressure field. The effects of pressure fluctuations will be discussed in more details toward understanding the blade rows interaction in the contra-rotating axial flow pump.

关键词：涡轮机逆旋转转子压力场叶栅交感测量方法

Photochemical production of ozone in marine boundary layer in the sea of Japan:Results of the Rishiri Fall Experiment campaign

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Science China Chemistry 2009年第12期52卷 2366-2372页

作者： QI Bin WANG ZhuQing TAKAMI akinori HATAKEYAMA Shiro School of Chemistry and Materials Sciences Shaanxi Normal UniversityXi’an 710062China National Institute for Environmental Studies 16-2 OnogawaTsukubaIbaraki 305-8506Japan

The Rishiri Fall Experiment (RISFEX ) campaign was performed in September 2003 at Rishiri island (45.07 N,141.12 E,and 35 m asl) in the sea of Japan to investigate photochemical production of ozone in the marine boundary layer. Total peroxy radicals ROx (HO2 + RO2) and NOx (NO + NO2) were measured together with other chemical species and physical parameters relevant to ozone production. The ozone production rate (P(O3)) was estimated from measured peroxy radicals and was found to be highly variable between days,with 30-min averaged midday values varying from 0.2 to 1.7 ppbv/h (ppbv refers to part per billion by volume). The daytime mean P(O3) for the air masses from relatively clean NE sector is close to zero,but significantly higher for air masses from more polluted W and SE sector,suggesting the impact of transport of pollutants on the remote local ozone production. The experimentally determined P(O3) is compared with those derived from a time-dependent box model based on Regional Atmospheric Chemistry Modeling (RACM),and both the methods give the results generally in agreement. The model calculation shows that HO2 + NO reaction contributes most to ozone production,ca. 60% at midday,followed by the reactions of CH3O2 and ISOP (peroxy radicals formed from isoprene) with NO which account for ca. 13% and 10% to ozone production,respectively,at noon. Sensitivity analysis indicates that the ozone production during the measurement period is within NOx-limited regime.

关键词： atmosphere ocean boundary layer O3 production rate photochemistry

Experimental Analysis of Flow Structure in Contra-Rotating Axial Flow Pump Designed with Different Rotational Speed Concept

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Journal of Thermal Science 2013年第4期22卷 345-351页

作者： Linlin Cao Satoshi Watanabe Toshiki Imanishi Hiroaki Yoshimura akinori Furukawa Graduate School of Engineering Kyushu University Department of Mechanical Engineering Kyushu University Oita National College of Technology

As a high specific speed pump, the contra-rotating axial flow pump distinguishes itself in a rear rotor rotating in the opposite direction of the front rotor, which remarkably contributes to the energy conversion, the reduction of the pump size, better hydraulic and cavitation performances. However, with two rotors rotating reversely, the significant interaction between blade rows was observed in our prototype contra-rotating rotors, which highly affected the pump performance compared with the conventional axial flow pumps. Consequently, a new type of rear rotor was designed by the rotational speed optimization methodology with some additional considerations, aiming at better cavitation performance, the reduction of blade rows interaction and the secondary flow suppression. The new rear rotor showed a satisfactory performance at the design flow rate but an unfavorable positive slope of the head - flow rate curve in the partial flow rate range less than 40% of the design flow rate, which should be avoided for the reliability of pump-pipe systems. In the present research, to understand the internal flow field of new rear rotor and its relation to the performances at the partial flow rates, the velocity distributions at the inlets and outlets of the rotors are firstly investigated. Then, the boundary layer flows on rotor surfaces, which clearly reflect the secondary flow inside the rotors, are analyzed through the limiting streamline observations using the multi-color oil-film method. Finally, the unsteady numerical simulations are carded out to understand the complicated internal flow structures in the rotors.

关键词： Contra-rotating rotors Internal flow Limiting streamlines Tip leakage vortex Corner separation