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RISS 인기검색어
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- 저자 : 이완옥 ( Wan-ok Lee ) (검색결과 55 건)
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참갈겨니 Zacco koreanus (Pisces: Cyprinidae)의 난 발생과 초기생활사
이완옥 ( Wan Ok Lee ),김경환 ( Kyeong Hwan Kim ),백재민 ( Jae Min Back ),송미영 ( Mi Young Song ) 한국어류학회 2013 한국어류학회지 Vol.25 No.4
We investigated developmental stages of egg and early life history of the Korean indigenous fish, Korean Chub Zacco koreanus from the South Han River in 2011 for phylogenetic study and conservation of this species. Eggs of Zacco koreanus were artificially fertilized by the dry method in the laboratory. The fertilized eggs were demersal, almost spherical in shape, transparent and unpigmented, with a pale yellow yolk, and no oil globule and average 3.09±0.07 mm (n=10) in diameter. The hatching of the embryo took place in about 68 hrs after fertilization under water tem-perature of 20.0~23.0℃ and the newly hatched larvae were average 10.30±0.40 mm (n=10) in total length (TL). Six days after hatching, the larvae grew up to 16.12±0.42 mm (n=8) in TL and york sac absorption, mouth and anus opening were shown postflexion larvae stage. 17 days after hatching, most of fin-rays appeared at 18.21±0.38 mm (n=6) in TL and brown spot appeared on the abdomen. 27 days after hatching, the larvae were brought up to 20.01±1.12mm(n=5) in TL and all their fin-rays were formed. 120 days after hatching, the larvae (juvenile) were 23.29±3.12 mm (n=10) in TL and their body shape and color pattern were similar to the adult fish.?
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HDPE / Polyaniline 전도성 복합체의 제조와 전기적 성질
정미옥(Mi Ok Jung),이완진(Wan Jin Lee) 한국공업화학회 1999 응용화학 Vol.3 No.1
The conducting composites were prepared by blending high density polyethylene (HDPE) as a matrix and polyaniline(PANI) as a conducting polymer in xylene. The PANI was protonated with dodecylbenznesulfonic acid(DBSA). The film of composite was prepared by compression molding. The electrical conductivity was measured by 4 probes method with the amount of PANI and temperature. When the content of PANI was 25wt%, the electrical conductivity of composite increased up to 2.62 S/cm. The percolation threshold showed at the vicinity of 15 wt% PANI content.
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NBR / Polypyrrole 전도성 복합체의 제조와 전기적 성질
정미옥(Mi Ok Jung),이완진(Wan Jin Lee) 한국공업화학회 2000 응용화학 Vol.4 No.1
The conducting composites were prepared by emulsion polymerization with poly(acrylonitrile-co-butadiene)(NBR) as a matrix and polypyrrole(PPY) as a conducting polymer. The film of composite was prepared by compression molding. The electrical conductivity was measured by 4 probes method with the amount of PPY and temperature. When the content of PPY was 25 wt%, the electrical conductivity of composite was increased up to 1.17 S/㎝. The percolation threshold showed in the vicinity of 15 wt% PPY content.
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전도성 고분자를 이용한 고분자 전해질형 연료전지의 전극 특성
정미옥(Mi Ok Jung),이무성(Moo sung Lee),김종호(Jong Ho Kim),양갑승(Kap Seung Yang),이완진(Wan Jin Lee) 한국공업화학회 2000 응용화학 Vol.4 No.2
A new supported catalyst was prepared by the chemical reduction of Pt compound in a polypyrrole/sulfonated polycarbonate (PPy/SPC) conducting composite. The proton and electron conductivity of the new catalyst was high. The cyclic voltammograms show electrical characteristics which redox reaction was good for new catalyst and conducting composite.
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Poly ( acrylonitrile - co - butadiene ) Rubber / Polypyrrole 전도성 복합체의 제조와 전기적 성질에 관한 연구
정미옥(Mi Ok Jung),허양일(Yang Il Huh),이완진(Wan Jin Lee) 한국고무학회 2000 엘라스토머 및 콤포지트 Vol.35 No.3
The conducting composites were prepared by emulsion polymerization with poly (acrylonitrile-co-butadiene) (NBR) as a matrix and polypyrrole (PPY) as a conducting polymer. Among several surfactants, the electrical conductivity of the composite which was polymerized by dodecyl sodium sulfate (DSS) was the best. The film of composite was prepared by compression molding. The electrical conductivity was measured by 4 probes method as a function of PPY and temperature. When the content of PPY was 25 wt%, the electrical conductivity of composite was increased up to 1.17 S/㎝. The percolation threshold showed at the vicinity of 15 wt% PPY content.
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