• Title/Summary/Keyword: Glove-box

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Characteristic Feature of Inductively Coupled Plasma Atomic Emission Spectrometer/Shielding System and Evaluation of Its Applicability to Analysis of Radioactive Materials (유도 결합 플라스마 원자방출분광기/차폐 시스템의 특성 및 방사성 물질 분석에 대한 적용성 평가)

  • Lee, Chang Heon;Suh, Moo Yul;Choi, Kae Chun;Park, Yang Soon;Jee, Kwang Yong;Kim, Won Ho
    • Analytical Science and Technology
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    • v.13 no.4
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    • pp.474-483
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    • 2000
  • An inductively coupled plasma atomic emission spectrometer/shielding system was specially designed and built for the analysis of radioactive materials. Both of an inductively coupled plasma source and a sample transfer system to be contacted with radioactive materials was installed in a stainless steel glove box. In terms of analytical capability and radiation safety, characteristic feature of the system was investigated. Its applicability to the determination of fission products and corrosion products in the radioactive materials such as spent fuel dissolver solution and the primary coolant of nuclear power reactors was evaluated. In the concentration range $0.01-0.1mgL^{-1}$, the relative standard deviation was found to be less than 5%.

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Improvement of PLED Efficiency by Post-annealing Process

  • Seo, Jun-Seon;Kim, Jae-Hyun;Hong, Seok-Min;Kang, Byoung-Ho;Kim, Do-Eok;Kim, Hak-Rin;Kang, Shin-Won
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.846-849
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    • 2009
  • In this study, we manufactured polymer-LED using light emitting copolymer as the active layer. After cathode layer deposition, we did post-annealing at $150^{\circ}C$ during 10 min in $N_2$ glove box. Then, we confirmed that the efficiency of the device was significantly enhanced by post annealing process. Its value was increased from 0.18(cd/A) to 1.32(cd/A), approximately 7 times. This phenomenon is a result of improved stability between polymer and metal cathode for injection of electrons as the contact density increases.

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리튬고분자 이차전지의 전기적 전기화학적 특성

  • 박수길;박종은;손원근;류부형;이주성
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1998.06a
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    • pp.159-162
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    • 1998
  • The new type polymer electrolyte composed of polyacrylonitrile(PAN) baed polymer electrolyte contain LiClO$_4$-EC/PC and LiPF$\sub$6/-EC/PC were developed for the weightless and long or life time of lithium polymer battery system with using polyaniline electrode. The gel type electrolytes were prepared by PAN at different lithium salts in the glove box. We prepared for polymer electrolyte with knife casting method. The minimum thickness of PAN gel electrolyte for the slim type is about <400∼500$\mu\textrm{m}$. These gel electrolytes showed good compatibility with lithium electrode. The test cell of Li/polymer electrolyte/Lithium cobalt oxide solid state cell which was prepared by different lithium salt was researched by electrochemical technique. Resistance of polymer electrolyte which consist of LiClO$_4$ is more less than that of LiPF$\sub$6/ and cycle life is more longer than that of LiPF$\sub$6/.

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Electric and Electrochemical Characteristic of PMMA-PEO Gel Electrolyte for Rechargeable Lithium Battery

  • 박수길;박종은;이홍기;이주성
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.11 no.10
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    • pp.768-772
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    • 1998
  • The new type polymer electrolyte composed of polymethyl methacrylate(PMMA) - polyethy leneoxide(PEO) contain $LiClO_4$ -EC/PC was developed for the weightless and long or life time of lithium polymer batery system with using polyaniline electrode. the gel type electrolytes were prepared by PMMA with PEO at different lithium salts in the glove box. The minimum thickness of PMMA-PEO gel electrolyte for the slim type is about(400~450$\mu\textrm{m}$. These gel electrolyte showed good compatibility with lithium electrode. The test cell Li/polymer electrolyte/polyaniline solid state cell which was prepared by different lithium salt was researched by electrochemical technique.

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Ergonomic Evaluation of Some University Laboratories

  • Lee, Yun Keun;Lee, Ik Mo;Park, Jeongim;Yoon, Chung Sik;Rhie, Kwang Won;Park, Hee Sok
    • Journal of the Ergonomics Society of Korea
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    • v.32 no.4
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    • pp.397-403
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    • 2013
  • Objective: This article aims to report the results of ergonomic evaluation of some university laboratories. Background: Laboratory researchers are at risk for musculoskeletal injuries during routine laboratory procedures. However, little attention has paid to the working conditions of laboratory researchers, especially in Korea. Method: A checklist and questionnaire was developed and used to analyze the work conditions of 27 laboratories of chemistry, biology and pharmacy. Results: It was found that glove box, clean bench, and computer workstation are better than microscopy, and fume hood tasks, from ergonomic point of view. Conclusion: No domestic guideline is available for ergonomic intervention of laboratories. Further attention and studies are anticipated to improve the working conditions of laboratories.

Preparation of nanoparticles CuInSe2 absorber layer by a non-vacuum process of low cost cryogenic milling (저가의 cryogenic milling 비진공법을 이용한 나노입자 CuInSe2 광흡수층 제조)

  • Kim, Ki-Hyun;Park, Byung-Ok
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.23 no.2
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    • pp.108-113
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    • 2013
  • Chalcopyrite material $CuInSe_2$ (CIS) is known to be a very prominent absorber layer for high efficiency thin film solar cells. Current interest in the photovoltaic industry is to identify and develop more suitable materials and processes for the fabrication of efficient and cost-effective solar cells. Various processes have been being tried for making a low cost CIS absorber layer, this study obtained the CIS nanoparticles using commercial powder of 6 mm pieces for low cost CIS absorber layer by high frequency ball milling and cryogenic milling. And the CIS absorber layer was prepared by paste coating using milled-CIS nanoparticles in glove box under inert atmosphere. The chalcopyrite $CuInSe_2$ thin films were successfully made after selenization at the substrate temperature of $550^{\circ}C$ in 30 min, CIS solar cell of Al/ZnO/CdS/CIS/Mo structure prepared under various deposition process such as evaporation, sputtering and chemical vapor deposition respectively. Finally, we achieved CIS nanoparticles solar cell of electric efficient 1.74 % of Voc 29 mV, Jsc 35 $mA/cm^2$ FF 17.2 %. The CIS nanoparticles-based absorber layers were characterized by using EDS, XRD and HRSEM.

Effects of surface-treated boron powder using chemical solvents on MgB2 bulk superconductors

  • Lim, J.Y.;Ahn, J.H.;Ranot, M.;Oh, Y.S.;Kang, S.H.;Jang, S.H.;Hwang, D.Y.;Chung, K.C.
    • Progress in Superconductivity and Cryogenics
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    • v.20 no.3
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    • pp.11-14
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    • 2018
  • $MgB_2$ superconducting properties have been investigated with the surface-treated boron powders using the chemical solvents. Various solvents were used such as acetone, ethanol, methanol, and water to possibly modify the surface condition of raw boron powders as received. This treatment was done at an argon gas environment inside the glove box to reduce the further contamination during and after chemical treatments. It was found that $T_c$ values were increased to 37.58-37.73 K from the pure sample of 37.50 K when they were treated in inert environment. High- fields $J_c$ at both 5 & 20 K was all increased regardless of any kinds of chemical treatments mentioned above. It is also noted that the $J_c$ at low-fields were increased in the order of solvents: ethanol > acetone > pure $MgB_2$ = methanol > water.

A Study on the Separation of Long-lived Radionuclides and Rare Earth Elements by a Reductive Extraction Process (환원추출에 의한 장수명핵종과 희토류 원소의 분리 연구)

  • 권상운;안병길;김응호;유재형
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • 2003.11a
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    • pp.421-425
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    • 2003
  • The reductive extraction process is an important step to refine the TRU product from the electrorefining process for the preparation of transmutation reactor fuel. In this study, it was studied on the reductive extraction between the eutectic salt and Bi metal phases. The solutes were zirconium and the rare earth elements, where zirconium was used as a surrogate for the transuranic(TRU) elements. All the experiments were performed in a glove box filled with a argon gas. Li-Bi alloy was used as a reducing agent to reduce the high chemical activity of Li. The reductive extraction characteristics were examined using ICP, XRD and EPMA analysis. The reduction reaction was equilibrated within 3 hours after the Li addition. Three eutectic salt systems were compared and Zr was successfully separated from the rare earth elements in all the three salt systems.

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Isolation and Identification of an Anaerobic Dissimilatory Fe(III)-Reducing Bacterium, Shewanella putrefaciens IR-1

  • Hyun, Moon-Sik;Kim, Byung-Hong;Chang, In-Seop;Park, Hyung-Soo;Kim, Hyung-Joo;Kim, Gwang-Tae;Kim, Mi-a;Park, Doo-Hyun
    • Journal of Microbiology
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    • v.37 no.4
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    • pp.206-212
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    • 1999
  • In order to isolate a Fe(III)-reducer from the natural environment, soil samples were collected from various patty fields and enriched with ferric citrate as a source of Fe(III) under anaerobic condition. Since the enrichment culture was serially performed, the Fe(III)-reduction activity was serially diluted and cultivated on an agar plate containing lactate and ferric citrate in an anaerobic glove box. A Gram negative, motile, rod-shaped and facultative anaerobic Fe(III)-reducer was isolated based on its highest Fe(III)-reduction activity, Bacterial growth was coupled with oxidation of lactate to Fe(III)-reduction, but the isolate fermented pyruvate without Fe(III), The isolate reduced an insoluble ferric iron (FeOOH) as well as a soluble ferric iron (ferric citrate). Using the BBL crystal enteric/non-fermentor identification kit and 16S rDNA sequence analysis, the isolate was identified as Shewanella putrefaciens IR-1.

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Bonding Characteristics of GaAs Surface after Wet Cleaning (습식세정에 따른 GaAs표면 결합상태의 연구)

  • Gang, Min-Gu;Park, Hyeong-Ho;Seo, Gyeong-Su;Lee, Jong-Ram;Gang, Dong-Gyu
    • Korean Journal of Materials Research
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    • v.6 no.4
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    • pp.379-387
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    • 1996
  • 본 연구에서는 GaAs 소자제작 및 epi-layer 성장 공정에 있어 이용되어지는 HCI, H3PO4, 탈이온수(de-ionized water:DIW)를 통한 습식제정후 공기중 노출에 따른 오염을 최소화하여 표면상태 변화를 진성적(intrinsic)으로 관찰하고자 모든 세정처리를 아르곤 가스(argon gas)로 분위기가 유지되는 glove box에서 수행하였으며, 표면조성 및 결합상태 변화에 대한 관찰은 X-선 광전자 분광기(X-ray photoelectron spectroscopy)를 통해 이루어졌다. 고진공하에서 GaAs를 벽개하여 관찰함으로써 Ga이 대기중 산소이온과 우선적으로 결합함을 알 수 있었고, 이런 GaAs 표면의 반응성에 대한 고찰을 바탕으로 습식세정에 따른 화학반응 기구가 제시 되어졌다. HCI 및 H3PO4/DIW/HCI처리후 CI-이온의 Ga 이온과의 반응에 의한 Ga-CI결합의 형성과 As 산화물의 높은 용해도에 따른 As 산화물의 완전한 제거 및 식각전 초기(bare)GaAsvyaus에 존재하는 원소(elemental)As 상태의 식각후 잔류가 관찰되어졌다. 또 HCI, H3PO4/DIW/HCI 처리하고 DIW로 세척후 표면상태 변화를 관찰한 결과, DIW처리에 의해 elemental As 상태가 증가함을 알 수 있었다.

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