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Asama火山冰冻灰积物的瑞利波速

地质科学译丛 1997年第3期14卷 57-59页

作者： ryoji sakurada 徐蓉 Akita National College of Technology AkitaOllJapan

在火山碎屑物沉积地区,道路的冻胀破坏大多与当地的水文地质条件相关。主要研究在道路的冻胀破坏中层状土的效应。在 Asama 火山山麓的灰积物上运用地质勘探中的瑞利波方法,将与地质条件相关的冰冻破坏归纳为两种形式:(1)冰冻破坏受厚... 详细信息

在火山碎屑物沉积地区,道路的冻胀破坏大多与当地的水文地质条件相关。主要研究在道路的冻胀破坏中层状土的效应。在 Asama 火山山麓的灰积物上运用地质勘探中的瑞利波方法,将与地质条件相关的冰冻破坏归纳为两种形式:(1)冰冻破坏受厚覆盖高胀土控制;(2)冰冻破坏受低胀土路床的排泄条件控制,低胀土层在地下水流入后易变为中胀土层。

关键词：瑞利波法冻胀火山灰冰冻破坏灰积物

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下水道用低强度垫层砂浆的力学性能

国外建材科技 2000年第4期21卷 19-22页

作者：涂成厚 ryoji sakurada 武汉理工大学材料学院 430070

坑砂一直被用于制作下水管的密实填充料。然而这类密实砂质填料易被渗漏流所冲蚀,从而导致路基下沉并使冲出的砂石流入下水道中,另外,酸性土壤和渗透到地下的氯化物也会引起下水管的腐蚀。因此开发一种新型的流动性好的填料以取代传统... 详细信息

坑砂一直被用于制作下水管的密实填充料。然而这类密实砂质填料易被渗漏流所冲蚀,从而导致路基下沉并使冲出的砂石流入下水道中,另外,酸性土壤和渗透到地下的氯化物也会引起下水管的腐蚀。因此开发一种新型的流动性好的填料以取代传统砂石很有必要。在美国,受控低强度材料,即人们所熟知的易流动填料、控制密度填料等,已经证明可适用于管道垫层、填隙和控制侵蚀等。与传统砼相比,这些易流动填料的抗压强度较低,因而混合物的耐久性就不能和砼相提并论,但作为回填料还是能满足预期要求的。

关键词：下水道垫层砂浆密实填充料力学性能

RAYLEIGH WAVE VELOCITY FOR FROST SUSCEPTIBLE VOLCANIC ASH DEPOSITS IN ASAMA VOLCANO

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RAYLEIGH WAVE VELOCITY FOR FROST SUSCEPTIBLE VOLCANIC ASH DE...

Evaluation of Expansion Process to Improve Corrosion Resistance of Copper Tubes with High Residual Carbon on the Inner Surface

岩石力学与环境岩土工程国际会议

作者： ryoji sakurada Hideo Miyaguchi Ichiro Kuroshima Akita National College of Technology Akita 011 Japan Civil Engineers Co. Ltd.Tokyo 110 Japan Mitsui Construction Co. Ltd.Tokyo 110 Japan

＜正＞In the regions covered with pyroclastic fall deposits,most of the frost-heave damages of road relates to hydrogeological conditions of a location.In this study,emphasis is given to the effect of soil stratification on the frost damages of road.As a geological exploration Rayleigh wave method was employed for the ashy deposits in the foot of Asama volcano.The frost damages attributed to geological conditions can be summarized as following two forms:（1）Frost damages dominated by the thickly covered,high-heaving soils,（2）Frost damages dominated by drainage conditions of roadbed formed by low-heaving soils.The low-heaving soils easily become mid-heaving soils if once groundwater flows into the soils.

关键词： Rayleigh wave method frost heave volcanic ash

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Materials Sciences and Applications 2023年第2期14卷 45-52页

作者： Yuma Kano Itaru Ikeda Takashi Iyasu Yuna Yamaguchi Yutaka Yamada Osamu sakurada Department of Chemistry and Biomolecular Science Faculty of Engineering Gifu University Gifu Japan Dai-Dan Co. Ltd. Saitama Japan Kurita Water Industries Ltd. Tokyo Japan Daiwa Techno Co. Ltd. Gifu Japan

Residual carbon on the inner surface of copper tubes is known to be a cause of pitting corrosion. We showed previously that the rapid filling test was useful to evaluate the pitting corrosion resistance of copper tubes. Immersion tests using the rapid evaluation test solution showed that corrosion occurs on the entire surface of copper tubes with low residual carbon amounts, while those with high residual carbon amounts show pitting corrosion. Therefore, it is necessary to improve the corrosion resistance of copper tubes with high residual carbon amount, which are expected to undergo pitting corrosion. As pitting corrosion occurs when anodes are locally concentrated on part of the metal surface, it has been suggested that anodes be dispersed over the entire surface by the processing of the metal surface. Metal processing methods have various purposes, including changing the shape and properties of metals, and in this case, leading to desirable surface properties (such as expansion and drawing processes). Here, we focused on the expansion process and its effects on corrosion resistance of copper tubes. The results showed that hydraulic expansion has a significant effect on the inner copper surface by improving corrosion resistance as the anode area increases.

关键词： Expansion Process Carbon Film Pitting Corrosion Corrosive Anion the Pitting Corrosion Resistance Test

Relationship between Corrosion Form and Elution Behavior of Copper Tubes Surfaces with Different Residual Carbon Amounts

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Materials Sciences and Applications 2022年第12期13卷 595-602页

It was well known that residual carbon on the inner surface of copper tubes was a cause of pitting corrosion, and copper tube surfaces with different residual carbon amount were different corrosion forms. In this study, the relation between corrosion form and elution of copper in immersion tests by accelerated corrosion test solutions was examined. Generally, pitting corrosion that occurs in actual machines was reported to observe chloride ion at the bottom of the pitting corrosion of copper tubes. Energy dispersive X-ray (EDX) mapping analysis indicated that chlorine was concentrated in the upper layer of the samples where copper was not detected under conditions of low residual carbon amount, while chlorine was concentrated under part of the micromounds (including the bottom of the pits) under conditions of high residual carbon amount. It was also suggested that the amount of copper eluted was related to the amount of residual carbon.

关键词： Carbon Film Residual Carbon Amount Pitting Corrosion Corrosive Anion The Pitting Corrosion Resistance Test

双空心阴极灯交替辐射火焰原子吸收分光光度计同时测定银和铜

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有色矿冶 1991年第5期7卷 49-53页

作者： Osamu sakurada 王敏蕾

本文描述了一种用火焰原子吸收分光光度计同时测定银和铜的方法。被采用的银(328.07nm)和铜(327.40nm)的共振灵敏线均在相同的单色信通带内。因此,当银和铜的空心阴极灯交替辐射时,能够同时地测出银和铜的吸收信号。用计算机控制,使辐... 详细信息

本文描述了一种用火焰原子吸收分光光度计同时测定银和铜的方法。被采用的银(328.07nm)和铜(327.40nm)的共振灵敏线均在相同的单色信通带内。因此,当银和铜的空心阴极灯交替辐射时,能够同时地测出银和铜的吸收信号。用计算机控制,使辐射和吸收数据的获得同步进行。由于要把试样引入火焰中,试验了一种分立喷雾的方法,以减少所需试样的体积并节省分析的时间。

关键词：空心阴极灯光度法银焊条银铜

Local Peripheral Effects of <i>β</i>-Caryophyllene through CB<sub>2</sub>Receptors in Neuropathic Pain in Mice

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Pharmacology & Pharmacy 2012年第4期3卷 397-403页

作者： Hikari Kuwahata Soh Katsuyama Takaaki Komatsu Hitoshi Nakamura Maria Tiziana Corasaniti Giacinto Bagetta Shinobu sakurada Tsukasa sakurada Kazuo Takahama Department of Clinical Pharmaceutics Tohoku Pharmaceutical University Sendai Japan Department of Environmental and Molecular Health and Sciences Graduated School of Pharmaceutical Sciences Kumamoto University Kumamoto Japan Department of Pharmacobiological Sciences University of Magna Gracia of Catanzaro Catanzaro Italy Department of Pharmacobiology and University Consortium for Adaptive Disorders and Headach (UCADH) Section of Neuropharmacology of Normal and Pathological Neuronal Plasticity University of Calabria Arcavacata di Rende Italy Department of Pharmacology Daiichi College of Pharmaceutical Sciences Fukuoka Japan Department of Physiology and Anatomy Tohoku Pharmaceutical University Sendai Japan.

β-Caryophyllene (BCP) is known as a common constitute of the essential oils of numerous food plants and primary component in Cannabis. In this study, we investigated the effect of local intraplantar (i.pl.) injection of BCP on mechanical hypersensitivity induced by partial sciatic nerve ligation (PSNL) in mice. Relative to sham operation controls, mice with the PSNL displayed a maximum level of hyperresponsiveness to von Frey metallic filament on post-operative day 7. PSNL-induced allodynia was seen in the ipsilateral side of nerve ligation, but not in the contralateral side. The i.pl. injection of BCP into the ipsilateral hindpaw to PSNL attenuated mechanical allodynia in a dose-dependent manner. BCP injection into the contralateral hindpaw did not produce anti-allodynic effects, suggesting a local peripheral anti-allodynic effect of BCP. Anti-allodynic effects induced by i.pl. injection of BCP were prevented by pretreatment with the cannabinoid (CB2) receptor antagonist AM630, but not by the CB1 receptor antagonist AM251. These data suggest that i.pl. injection of BCP could produce anti-allodynia by activating peripheral CB2 receptors, but not CB1 receptors in a mouse model of neuropathic pain. Taken together, these results suggest that peripheral CB2 receptors may contribute to the effectiveness of BCP in the treatment of neuropathic pain disorders.

关键词： β-Caryophyllene (BCP) Neuropathic Pain Partial Sciatic Nerve Ligation (PSNL) Peripheral Cannabinoid (CB) Receptor

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柴油机用高性能阀座材料的开发

粉末冶金技术 2011年第4期29卷 308-312页

作者： Hanata K Sakai M Shigeeda T sakurada T 韩凤麟三菱材料公司三菱汽车公司

近年来,汽车发动机都要求较高使用性能来说,阀座的使用环境日益严酷。一般而言,设计的阀座材料的耐磨性,都是用实际发动机耐久试验评定的,试验时间都需要许多小时。在这项研究中,为柴油发动机排气阀座选择的材料制定了一个评定方法。这... 详细信息

近年来,汽车发动机都要求较高使用性能来说,阀座的使用环境日益严酷。一般而言,设计的阀座材料的耐磨性,都是用实际发动机耐久试验评定的,试验时间都需要许多小时。在这项研究中,为柴油发动机排气阀座选择的材料制定了一个评定方法。这种评定方法是根据模拟试验和发动机耐久试验间的关系研制出的。通过对硬度与磨损间关系的多变量分析,开发出了一种耐磨性优异的、成本低廉的阀座材料。

关键词：柴油发动机零件排气阀座评定方法

Study of Corrosion on Film Properties of High Strength Cu-Sn-Zr Alloys in Tap Water

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Materials Sciences and Applications 2020年第1期11卷 70-80页

作者： Itaru Ikeda Noriyuki Tanaka Motoki Kuratani Yutaka Yamada Osamu sakurada Yanagido Gifu-Shi Gifu University Gifu Japan Kitanagai Miyoshi-Machi Iruma-Gun Technical Research Laboratory DAI-DAN Co. Ltd. Saitama Japan

Corrosion has been reported to occur in the copper tubes of heat ex-changers in multiple-circulation hot water supply systems. We have been investigating the applicability of high-strength Cu-0.65 mass% Sn-0.014 mass% Zr-0.020 mass% P alloy to counteract this corrosion. Immersion tests, electrochemical measurements, and field tests were performed. Excellent corrosion resistance of the alloy was established under conditions with flowing water due to the formation of composite films containing tin. The alloy is expected to be better than copper as a corrosion-resistant material for heat exchanger tubes.

关键词： Cu-Sn-Zr Alloy Corrosion Resistance Heat Exchanger Hot Water Supply System Flow Condition