• Proceedings of the Membrane Society of Korea Conference
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• 1993.10a
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• pp.63-64
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• 1993

레독스-흐름 2차전지는 발전소의 잉여전력, 태양전지 및 전기자동차 등 응용 분야가 넓은 유망한 에너지 저장 방법의 하나이다[1,2]. Fe-Cr계 2차전지와 비교하여 수소 가스의 발생이 없고 양쪽 액의 확산에의한 혼합으로 전지의 용량이 떨어지지 않고 rebalance의 필요가 없는 등 많은 장점을 가지고 있으며 조작이 간단하며 기전력 (1,4 V)과 에너지 밀도가 높기 때문에 compact화가 가능하다[1].

• The Science & Technology
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• v.19 no.2 s.201
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• pp.79-84
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• 1986

- 환경내의 유전물질 빈도를 모니터 하기 위한 DNA 탐지장치 - RRV1 및 RRV2 로보트 - 기능적 특성을 예견하기 위한 비천연 단백질의 설계와 합성 - 고분해능의 주사 이온 미세탐침 - 에크타켐 DT60 혈액분석기 - 뇌일혈 치료시스템 - 레일건 - 소프트스트립 - 고수준 핵폐기물 저장용 납-철-인산염 유리공정 - 단백질과 DNA의 합성 및 분석 - 물의 광전해용 전극 - 애버트 비루스용 고급휴지 - 3480 자기테이프 서브시스템

• Proceedings of the Optical Society of Korea Conference
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• 2003.02a
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• pp.178-179
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• 2003

단일기본모드 수직공진표면광레이저(VCSELs)는 광네트워크, 광연결, 광저장 및 레이저 프린팅 등 다양한 분야에 응용이 가능한 소자로서 많은 관심과 연구가 증대되고 있다. 일반적으로 VCSELs은 공간홀버닝(spatial hole burning)과 열 렌즈효과(thermal lensing)로 인하여 단일기본모드로 동작하기가 쉽지 않다. 지금까지 여러 가지 연구가 진행되고 있는데 대표적인 예로서 VCSEL의 공진기를 길게 하거나 출력경 표면을 정교하게 식각하는 방법, 그리고 이온 주입구경과 산화막을 함께 사용한 것들이 있다. (중략)

• Proceedings of the Membrane Society of Korea Conference
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• 1998.10a
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• pp.31-36
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• 1998

1. 서론 : 산업이 고도로 발달함에 따라 야기되는 환경오염의 심각성이 날로 더해가고 있다. 특히 원자력 관련시설중 핵연료 재활용 공정에서 발생되는 방사성 폐기물의 처리기술에 대한 개발이 무엇보다도 시급한 실정이다. 핵연료 재활용 조작은 고준위 및 중준위 방사능 액체 폐기물을 발생시키며 이러한 방사능 액체 폐기물의 주요핵종은 긴 반감기를 갖는 것들이다. 이러한 방사능 액체 폐기물의 무해한 저장을 위해서 세계적으로 노력해 왔으며 고준위 폐기물은 유리화한후 심층매립을 하는 것이 가장 안전한 방법으로 고려되고 있다.(생략)

• Food Science and Preservation
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• v.11 no.4
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• pp.478-484
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• 2004

Freshness maintenance of polyethylene packaging film containing surface-modified zeolite was investigated depending on the nature of substituted cations and cationic surfactants. Freshness maintenance was designed to work by cation or cationic surfactant adsorbed onto the zeolite surface by ion-exchange method. Cationic surfactants such as DODAB (n-dodecyltrimethylammonium bromide), CTAB (n-cetyltrimethylammonium bromide), and DHAB (n-dihexadecyldime-thylammonium bromide), and cations ($Ce^{3+},\;Al^{3+},\;Mg^{2+},\;Ca^{2+},\;Ag^{3+},\;Na^{1+}\;and\;Cu^{3+}$) were used. Surface-modified zeolite powder was compounded with LDPE to produce $20\;wt\%$ zeolite masterbatch (M/B), and the M/B was again blended with LDPE to get zeolite-containing LDPE films with 3, 5, $10\;wt\%$ of zeolite (width: 40 cm, thickness: $40\;{\mu}m$). Mechanical properties of zeolite-containing LDPE films generally decreased with increasing zeolite content. However, cationic surfactant-modified zeolite film showed the better mechanical properties compared to cation-modified zeolite film. As for the freshness maintenance, the zeolite-containing films modified with cationic surfactants or cations ($Al^{3+},\;Ag^{3+}$) showed the best performance.

• Korean Chemical Engineering Research
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• v.57 no.4
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• pp.539-546
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• 2019

Global warming has mentioned as one of the international problems and these researches have conducted. Carbon Capture, Utilization and Storage (CCUS) technology has improved due to increasing importance of reducing emission of carbon dioxide. Among of various CCUS technologies, mineral carbonation can converted $CO_2$ into high-cost materials with low energy. Existing researches has been used ions extracted solid wastes for mineral carbonation but the procedure is complicated. However, the procedure using seawater is simple because it contained high concentration of metal cation. This research is a basic study using seawater-based wastewater for mineral carbonation. 3 M Monoethanolamine (MEA) was used as $CO_2$ absorbent. Making various concentrations of seawater solution, simulated seawater powder was used. Precipitated metal carbonate salts were produced by mixing seawater solutions and $rich-CO_2$ absorbent solution. They were analyzed by X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Thermogravimetric Analysis (TGA) and studied characteristic of producing precipitated metal carbonate and possibility of reusing absorbent.

• Journal of the Korean Electrochemical Society
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• v.14 no.4
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• pp.201-207
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• 2011

Supercapacitor has been studied actively as one of the most promising electrochemical energy storage system for a wide range of applications. To increase the energy density of supercapacitor, the introduction of ionic liquids is required. In this study, two types of EMI-$BF_4$ based on quaternary imidazolium salt were prepared with quaternary reaction and anion exchange. The structural characterization and thermal stability were analyzed by nuclear magnetic resonance($^1H$-NMR) and thermogravimetric analysis(TGA), respectively. Thermal stability of the EMI-$BF_4$ using TGA confirmed that, after heat treatment, the decomposition temperature of EMI-$BF_4$ was increased. Supercapacitors were fabricated with synthesized and commercial ionic liquids, and charge/discharge characteristics were also investigated. The capacity of supercapacitor, for synthesized and commercial EMI-$BF_4$ were determined to be 0.067 F and 0.073 F respectively, by means of charge/discharge test.

• Korean Chemical Engineering Research
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• v.51 no.6
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• pp.671-676
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• 2013

Recently, there are many efforts focused on development of Redox Flow Battery (RFB) for large energy storage system. Economical hydrocarbon membranes alternative to fluorinated membranes for RFB membrane are receiving attention. In this study, characteristics of poly(arylene ether sulfone) (PAES) were compared with expensive fluorinated membrane at VRB (Vanadium Redox Flow Battery) operation condition. Permeability of vanadium ion through membrane, ion exchange capacity (IEC), change of OCV, swelling, charge-discharge curves and energy efficiency were measured. PAES membrane showed lower permeability of vanadium ion, higher IEC and then higher energy efficiency compared with Nafion 117 membranes.

• Applied Chemistry for Engineering
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• v.31 no.5
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• pp.509-513
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• 2020

The performance of TiO₂ microcones/CNT composites as an anode material for lithium ion batteries was investigated. TiO₂ microcones/CNT composites were prepared by the polarization followed by electrophoretic deposition approaches on anodic TiO₂ microcones, which were composed of individual nanofragments resulting in a large surface area where lithium ion can be stored. Compared to pristine TiO₂ microcones, TiO₂ microcones/CNT composite electrodes showed higher areal capacity with a stable cyclability due to an enhanced electrical and lithium ion conductivity. Furthermore, TiO₂ microcones/CNT composite electrodes exhibited good cycle life characteristics and excellent rate retention under a high current density of up to 20 C.

• Journal of the Korean Society of Food Science and Nutrition
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• v.31 no.3
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• pp.399-404
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• 2002

The fermented fruit and vegetable mixed broth was prepared by using bacteriocin-producing lactic acid bacteria to evaluate the possibility of developing isotonic beverage with anticariogenic activity. Optimum conditions were also established to produce bacteriocin by a mixed culture system consisting of Lc. lactis and Leu. mesenteroides in a fruit and vegetable mixture. Production of bacteriocin was not observed when both strains were simultaneously innoculated, but pH adjustment of the broth fermented by Leu. mesenteroides to nearneutral pH stimulated the production of bacteriocin by Lc. lactis. The concentration of sodium of the fermented broth was higher than those of commercial products. Color change of the fermented broth was not observed during storage. The fermented broth showed strong inhibitory effect against Streptococcus mutans which is an oral inhabitant with a cariogenic activity. Bacteriocin activity in the fermented broth was retained very stable for 4 weeks at 4$\^{C}$. The results indicated that bacteriocin-producing lactic acid bacteria can be used for the preparation of a Korean style thirst-quenching beverage containing bacteriocin.