• 한국의류학회지
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• 제34권7호
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• pp.1065-1077
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• 2010

This study researchers the libretto and the original novel of the opera to propose fashion styles and stage costumes for the opera, "La $boh\grave{e}me$." This article studied the meanings of the $boh\grave{e}me$ in the 1830's France and the characteristics of the $boh\grave{e}me$ that appeared in the original novel, "$Sc\grave{e}nes$ de la vie de $boh\grave{e}me$." The characteristics of bohemian fashion styles in the $Sc\grave{e}nes$ de la vie de $boh\grave{e}me$ were not normal, not related with trends, and not new. Before presenting the new fashion styles, this study examined the stage costume problems of La $boh\grave{e}me$ with five existing performance materials. In conclusion, this study proposed new stage costume designs that reflect more dramatic fashion expressions of the characters, expression on the passage of time, and contemporary fashion records.

• 한국표면공학회지
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• 제46권2호
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• pp.87-92
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• 2013

Viscosities of $LaCl_3$-CsCl binary melts were measured by the capillary method over the range of their liquidus temperatures to about 1200 K. The cell constant were determined by using pure water. The results obtained are summerized as follows: Viscosities of melted $LaCl_3$ were decreased with the content of CsCl for all over the composition range of binary melts. Composition versus viscosity relation for the binary melt showed a non-linear relationship from the additivity line and the deviations showed a maximum value at about 60 mol% CsCl. This suggest the existence of the complex ion of $LaCl_4{^-}$ in the melt. Activation energy for the viscous flow of the binary melts decreased monotonously with the increasing content of CsCl after a few increasement till 40 mol% CsCl. All of these results were the resemble with the viscosities of $LaCl_3$-NaCl binary melts.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1985년도 추계학술대회 논문집
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• pp.21-23
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• 1985

By adding La$_2$O$_3$ to optical multicomponent glass composition, after making mother glass and core fiber that enable to enlarge the infrared transmittance region, then surveyed the optical properties. Through thermal analysis of the glass abstained by melt-quenching after selecting stable basic composition on devitrification and replace SiO$_2$ by 4-12wt% La$_2$O$_3$. As La$_2$O$_3$ increases up to l2wt% transition temperature, refractive index, density, deformation temperature increased, whereas thermal expansion coefficient decreased. As a result of inspectig transmittance in UV/VIS/IR region, visable region indicated the decrease of transmittance by increasing the La$_2$O$_3$ and transmittance region was enlarged by increasing the La$_2$O$_3$ in IR region. Also, fabricate core fiber at 820$^{\circ}C$ and severy the optical loss we could fact that La$_2$O$_3$ composition added 12wt% showed the minimum optical loss.

• 미생물학회지
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• 제36권4호
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• pp.312-315
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• 2000

논꽃동충하초(Paecilomyces tenuipes DGUM 32001)의 자실체를 메탄올로 추출하여 인간 암세포주에 대한 세포독성을 조사하였다. 메탄올 추출물의 암세포주에 대한 세포독성은 매우 우수하였다. 메탄올 추출물의 용매 분획 중, 에틸아세테이트 분획에서 가장 우수한 세포독성을 나타내었으며, HeLa, HeLa S3 및 A-431 암세포주에 대한 $IC_{50}$ 값은 각각 13, 35 및 30 $\mu$ g/ml이었다. 그러나, 이 분획의 HeLa 암세포주에 대한 세포독성은 apoptosis에 의하지 않음을 알 수 있었다. 배양 균사체의 메탄올 추출물은 A-431 암세포주에 대해 우수한 세포독성을 보여주었다.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part2
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• pp.1114-1115
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• 2006

The preparation of single-phase $CuLaO_2$ with delafossite-type structure by means of the solid-state reaction method was investigated using X-ray diffraction. The results showed that notwhistanding the fact that there was a trace of metallic copper, nearly single-phase $CuLaO_2$ was obtained by using $La(OH)_3$ as a lanthanum source and by firing the mixed powder with nonstoichiometric composition ratio of $La(OH)_3:Cu_2O=1:1.425$ in a vacuum at 1273 K for 10 h. The measurement of electrical conductivity and Seebeck coefficient showed that $CuLaO_2$ thus obtained was a p-type semiconductor and had a Seebeck coefficient of approximately $70{\mu}V/K$.

• 한국세라믹학회지
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• 제36권1호
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• pp.50-54
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• 1999

양이온 결손 La0.970Mn0.970O3의 x-ray photoemission spectroscopy를 온도를 함수로 측정하였다. 온도의 변화에 따라서 Mn 2p와 3d core level의 화학적 변동 및 이동이 관측되었다. 즉 Mn 2p 3/2와 1/2 및 La 3d core 스펙트럼은 온도의 증가와 함께 저 결합 에너지 측으로 이동이 관측되었다. 이러한 XPS 관측 결과는 Mn3+의 localization의 강도 변화에 의한 것으로 사료되며, Mn3+에 의한 Jahn-Teller효과 이외에도 conventional random potential 효과 역시 La0.790Mn0.970O3의 전도 carrier의 localization에 기여하는 것으로 사료된다.

• 대한화학회지
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• 제33권1호
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• pp.82-89
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• 1989

염화산화란탄(LaOCl) 결정속에서 La와 치환된 $Eu^{3+}$와 $Tb^{3+}$의 형광성질을 연구하였다. 자외선으로 들뜬 LaOCl의 형광세기를 활성제인 $Eu^{3+}$와 $Tb^{3+}$의 농도에 따라 고찰하였고, 이 현상을 활성제들 사이의 에너지 전달 과정으로 설명하였다. LaOCl 결정속에 $Eu^{3+}$와 $Tb^{3+}$를 같이 분포시키면 흡수된 에너지가 $Tb^{3+}$에서$Eu^{3+}$로 전달됨을 보았다. 치환된 활성제의 양에 따른 형광세기의 변화와 쇄잔시간의 측정으로부터 이 사실을 확인하였다.

• Advances in materials Research
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• 제4권2호
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• pp.77-85
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• 2015

The influence of rare earth lanthanum (La) on solidification cooling range, microstructure of aluminum-magnesium (Al-Mg) alloy and mechanical properties were investigated. Five kinds of Al-Mg alloys with rare earth content of La (i.e., 0, 0.5, 1.0, 1.5 and 2.0 wt.%) were prepared. Samples were either slowly cooled in furnace or water cooled. Results indicate that the addition of the rare earth (RE) La can significantly influence the solidification range, the resultant microstructure, and tensile strength. RE La can extend the alloy solidification range, increase the solidification time, and also greatly improve the flow performance. The addition of La takes a metamorphism effect on Al-Mg alloy, resulting in that the finer the grain is obtained, the rounder the morphology becomes. RE La can significantly increase the mechanical properties for its metamorphism and reinforcement. When the La content is about 1.5 wt.%, the tensile strength of Al-Mg alloy reaches its maximum value of 314 MPa.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
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• pp.232-233
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• 2007

We manufactured Liquid Crystal Polymer (LCP) and (1-x)CaTiO3-xLaAlO3 (CT-LA) ceramic composites and investigated dielectric properties to use as embedded capacitor in printed circuit boards and replace LTCC substrate. The dielectric properties of these composites are varied with volume fraction of CT-LA and ratios of CT/LA. Dielectric constants are in the range of 3~15. In addition, we could get low TCC and High Q value that could not achieve in other ceramic-polymer composites. Especially, in composite with x=0.01 and 30 vol% CT-LA, the dieletric constant and Q-value are 10 and 200, respectively. And more TCC is $-28{\sim}300ppm/^{\circ}C$ in the temperature range of $-55{\sim}125^{\circ}C$. We think that this composites can be used high-Q substrate material like LTCC and embedded temperature compensation capacitor in printed circuit boards.

• Membrane and Water Treatment
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• 제12권2호
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• pp.75-82
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• 2021

This study aimed to prepare a W/O nonionic microemulsion system(MEs) consisting of OP-4[polyoxyethylene(4) nonylphenol], OP-7[polyoxyethylene(7) nonylphenol], 1-hexanol, D2EHPA, kerosene and HCl solution and applied to the extraction of La(III) from chloride aqueous solution within the polysulfone hollow fiber contactor (HFC),laboratory-scale experiments were carried out to investigate the recovery of La(III) using as-prepared microemulsion from the simulation wastewater containing La(III),Al(III) and Fe(III). The right weight ratio(Rs) of OP-4 to OP-7 was firstly confirmed through determination of the solubilization capacity of HCl solution(W0,HCl) in microemulsion, the effect of several factors such as the HCl concentration, temperature and effective extraction time on the extraction efficiency of La(III) was discussed. Results showed that the acceptable Rs was 4:6 to prepare the W/O MEs. The extraction yield of La(III) increased with the increasing of HCl concentration, temperature and effective extraction time and reaches to 97.3% while using five-stage modules. The recovery yield of La(III) from simulation La-bearing wastewater was 90.6%.