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Properties of Dispersion Casting of Y2O3 Particles in hypo,hyper and Eutectic Binary Al-Cu Alloys

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Journal of Materials science & Technology 2008年第1期24卷 57-59页

作者： J.J.Park G.h.Kim s.M.hong s.h.lee M.K.lee C.K.Rhee Nuclear Nano-Materials Development Lab. Korea Atomic Energy Research Institute （KAERI） 150 Deukjin-dongYuseong-gu Daejeon Korea

In the present work,the dispersion casting of Y-2O-3 particles in aluminum-copper alloy was investigated in terms of microstructural changes with respect to Cu contents of 20 （hypo）,33 （eutectic） and 40 （hyper） wt pct by scanning electron microscopy （sEM） and energy dispersive spectroscopy （EDs）.For the fabrication of Al-Cu alloy dispersed Y-2O-3 ceramic particles,stir casting method was *** case of Al-20 wt pct Cu alloy （hypoeutectic）,sEM images revealed that primary Al was grown up in the *** that,eutectic phase with well dispersed ceramic particles was *** case of eutectic composition,Y-2O-3 particles were uniformly dispersed in the *** the Cu is added into Al up to 40 wt pct （hypereutectic）,primary phase was grown up without any Y-2O-3 ceramic particles in the early stage of ***, eutectic phase was formed with well dispersed ceramic *** can be concluded that Y-2O-3 ceramic particles is mostly dispersed in case of eutectic composition in Al-Cu alloy.

关键词： Dispersion casting Y2O3 particles stir casting Al-Cu alloy

Evaluation of the virulence of entomopathogenic fungus, Isaria fumosorosea isolates against subterranean termites Coptotermes spp.(Isoptera:Rhinotermitidae)

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Journal of Forestry Research 2019年第1期30卷 213-218页

作者： J.J.Jessica T.L.Peng A.s.sajap s.h.lee s.A.syazwan Department of Forest Management Faculty of ForestryUniversiti Putra Malaysia (UPM) Faculty of Veterinary Medicine University Malaysia Kelantan Institute of Tropical Forestry and Forest Products Universiti Putra Malaysia (UPM) Mycology and Pathology Laboratory Forest Biodiversity Division Forest Research Institute Malaysia

The entomopathogenic fungus Isaria fumosorosea Wize, formerly known as Paecilomyces fumosoroseus is reported as a promising biocontrol agent for controlling subterranean termites, particularly those belonging to the family Rhinotermitidae. In Malaysia, the family Rhinotermitidae includes two species of subterranean termites with extremely high economic importance; namely Coptotermes curvignathus holmgren, and the Asian sLubterranean Termite (Coptotermes gestroi Wasmann). To comprehend the potential control of this soil-dwelling fungus against these subterranean termites in Malaysia, an investigation was carried out by testing the pathogenecity of 11 isolates against these termite species. All isolates showed pathogenic potential against the termite (Mortality rate of C. curvignathus:84.4%; C. gestroi:67.3%). IsolatePF49 was the most effective against both species of termites and was further tested for its virulence and *** LC_(50) values of PF49 against C. curvignathus and *** were 7.55×103 and 1.09×102 conidia/ml,respectively. The average number of days required to complete the mycosis process in C. curvignathus and *** were 4.7 and 8 days, respectively. These fungi are believed useful for protecting living trees, plants, wood,wood structures, and other cellulosic materials susceptible to termite infestation and damage.

关键词： Biological control Entomopathogenic fungus subterranean termites Lethal concentration

Direct Analysis of solid Rare Earth sample Using Isotope Dilution Laser Ablation ICP-Ms

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Direct Analysis of Solid Rare Earth Sample Using Isotope Dil...

第三十五届国际光谱会议

作者： J.K.suh s.h.lee Division of Chemical Metrology and Materials Evaluation KRIss P.O.Box 102YusungTaejon 305-600South Korea Department of Chemistry Kyungpook National University Taegu 702-701South Korea

＜正＞Rare earth compounds have attracted considerable practical interest and in some high- technology fields,their purity is of great *** the demand for high purity of REEs is increasing,the development of reliable analytical methods is *** ablation inductively coupled plasma isotope dilution mass spectrometry （LA-ICPIDMs） with a special laser ablation system was applied for direct determinations of rare earth elements in solid samples without sample *** target elements in this work

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韩国I号多用途卫星介绍

气象科技 1999年第1期27卷 49-53页

作者： h.Y.Paik h.s.Youn s.h.lee 谷松岩江吉喜韩国宇航研究所卫星应用部

韩国宇航研究所（ＫＡＲＩ）正在研制韩国Ｉ号多用途卫星（ＫＯＭＰＳＡＴ－Ｉ），这颗卫星的有效载荷包括光电摄像机（ＥＯＣ），海洋多光谱扫描成像仪（ＯＳＭＩ），以及空间物理传感器（ＳＰＳ）。卫星重约５００ｋｇ，沿高度为６８... 详细信息

韩国宇航研究所（ＫＡＲＩ）正在研制韩国Ｉ号多用途卫星（ＫＯＭＰＳＡＴ－Ｉ），这颗卫星的有效载荷包括光电摄像机（ＥＯＣ），海洋多光谱扫描成像仪（ＯＳＭＩ），以及空间物理传感器（ＳＰＳ）。卫星重约５００ｋｇ，沿高度为６８５ｋｍ的太阳同步轨道运行，上午１０：５０过境韩国，卫星预计１９９９年发射，设计寿命将超过３年。

关键词：韩国多用途卫星 KOMPsAT-I 卫星系列

垂直排水法中非织造布土工袋和机织土工袋的比较研究

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产业用纺织品 2000年第11期18卷 14-17,22页

作者： M.Chung s.D.Cho s.h.lee J.M.Koh 韩国建筑技术研究院韩国铁路研究院阳光土工管线公司

传统的网袋排水法是先将套管在可压缩土壤中打入一定深度以形成排水道 ,然后将圆筒状鱼网机织袋放置入套管中 ,并用砂填充网袋 ,最后将套管取出。通过对 4种不同规格的机织袋和非织造布袋进行现场试验 ,研究其在施工中的性能。采用砂石... 详细信息

传统的网袋排水法是先将套管在可压缩土壤中打入一定深度以形成排水道 ,然后将圆筒状鱼网机织袋放置入套管中 ,并用砂填充网袋 ,最后将套管取出。通过对 4种不同规格的机织袋和非织造布袋进行现场试验 ,研究其在施工中的性能。采用砂石、轮胎碎料、石屑和煤灰作填充材料。文章探讨了不同网袋的适用性 ,介绍了一种旨在防止网袋在套管中发生扭曲并保证排水道畅通的革新技术。这种方法的特点是采用专门设计的导板和直接接触套管管壁的抗扭曲杆 ,最后通过与传统网袋排水法的比较来验证其有效性。

关键词：非织造布土工袋机织土工袋垂直排水法排水道比较研究施工

Flow Injection Chemiluminescence Determination of L-dopa Using Potassium Permanganate-sodium sulfite system

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Flow Injection Chemiluminescence Determination of L-dopa Usi...

乳腺超声造影检查中乳腺组织成分和乳腺癌风险

第三十五届国际光谱会议

作者： s.M.Alam h.Y.Chung h.W.Park s.M Wabaidur C.W.Jeon s.h.lee Department of Chemistry Kyungpook National University Daegu 702-701Korea Department of Chemistry Kyungpook National University Daegu 702-701Korea Department of Chemistry Kyungpook National University Daegu 702-701Korea Department of Chemistry Kyungpook National University Daegu 702-701Korea Korea Institute of Geoscience ＆ Mineral Resources Daejon-305-350 Korea Department of Chemistry Kyungpook National University Daegu 702-701Korea

＜正＞A simple,rapid and precise flow injection chemiluminescence （FI-CL） method is proposed for the determination of L-dopa by combining the flow injection technique and its sensitizing effect on the weak chemiluminescence reaction between sulfite and acidic *** graph showed a linear response for L-dopa concentration in

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国际医学放射学杂志 2021年第6期 733-734页

作者： s.h.lee h.s.Ryu M.J.Jang A.Yi s.M.ha s.Y.Kim 何博

乳腺X线摄影中的乳腺密度是乳腺癌一个确定的风险因素,但不能用于区分腺体组织和纤维组织。目的评估乳腺超声筛查时女性乳腺腺体组织成分(GTC)与乳腺致密病

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COVID-19疫苗接种后腋窝淋巴结肿大的超声评估：前瞻性纵向研究

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国际医学放射学杂志 2022年第6期45卷 733-734页

作者： s.M.ha A.J.Chu J.B.lee Y.lee s.Y.Kim s.h.lee 郭慧敏

摘要新型冠状病毒肺炎（COVID-19）疫苗接种后，超声检查淋巴结肿大特征的时间变化和影像学上明显淋巴结肿大的预期持续时间仍不确定。目的采用超声纵向评估信使

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superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

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Journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： h.T.Jeong s.W.lee W.J.Kim Department of Materials science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

The superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the hCPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the heating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-Mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy superplasticity severe plastic deformation Grain size Grain growth