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Su Hyun Yun(윤수현),Young Sun Moon(문용선),Seong Beom Jin(진성범),In-Kyu Kang(강인규),Dong Hoon Lee(이동훈) 한국생명과학회 2011 생명과학회지 Vol.21 No.4
감귤 ‘성전온주’( C. unshiuMarc)와 ‘병감’( C. reticulateBlanco)을 교배하여 얻은 다배성종자에서 교잡실생을 생육초기에 효과적으로 식별할 수 있는 방법 얻고자 PCR 기법에 바탕을 둔 RAPD와 SRAP 방법을 수행하였다. UBC (9, 27, 229, 230, 254) 프라이머와 SRAP (F4/R27, F7/R14, F12/R10, F44/R62) 프라이머 조합들을 사용하여 55개의 교배종자에서 얻은 실생들을 조사한 결과 37개의 종자에서 교잡실생을 식별할 수 있었다. F7/R14프라이머 조합에서는 45.5% (25/55)의 교잡실생을 식별할 수 있었고, UBC27 프라이머에서는 50.9% (28/55)의 식별효율을 보였다. 성전온주와 병감의 교배종자에서 UBC27 프라이머와 F7/R14 프라이머조합을 동시에 적용하였을 때에는 33개(60%, 33/55)의 종자에서 교잡실생을 식별할 수 있었다. 따라서 RAPD와 SRAP를 이용하였을 때 다배성 종자에서 교잡실생을 생육초기에 효율적으로 식별할 수 있었다. The purpose of this study was to evaluate the methods of identifying zygotic seedlings of crosses between ‘Morita unshiu’ (Citrus. unshiuMarc.) and ‘Ponkan’ (C. reticulataBlanco). In order to investigate the frequency and position of zygotic seedlings and to determine the efficiency of zygotic seedling identification, random amplified polymorphic DNA (RAPD) and sequence-related amplified polymorphism (SRAP) were performed using UBC (9, 27, 229, 230, and 254) primers and F4/R27, F7/R14, F12/R10, and F44/R62 primer sets, respectively. A total of 37 putative zygotic seedlings out of 55 individuals were selected by RAPD and SRAP. The F7/R14 primer pair showed a screening ability of 45.5% (25/55), whereas the primer UBC27 revealed the highest efficiency of zygotic seedling identification (50.9%, 28/55). When both UBC27 and F7/R14 were properly used for selection of hybridized seedlings of ‘Morita unshiu’ (C. unshiuMarc.) and ‘Ponkan’ (C. reticulataBlanco), screening efficiency was increased to 60% (33/55) for putative zygotic seedlings. Thus, it is possible to select putative hybrid zygotic seedlings in an accurate and effective manner by RAPD and SRAP.
Li[Ni<sub>0.3</sub>Co<sub>0.4</sub>Mn<sub>0.3</sub>]O<sub>2</sub> 양극물질의 Li-La-Ti-O코팅 효과
이혜진,윤수현,박보건,유제혁,김관수,김석범,박용준,Lee, Hye-Jin,Yun, Su-Hyun,Park, Bo-Gun,Ryu, Jea-Hyeok,Kim, Kwan-Su,Kim, Seuk-Buom,Park, Yong-Joon 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.10
Li(Ni, Co, Mn)$O_2$ has been known as one of the most promising cathode materials for lithium secondary batteries. However, it has some problems to overcome for commercialization such as inferior rate capability and unstable thermal stability. In order to address these problems, surface modification of cathode materials by coating has been investigated. In the coating techniques, selection of coating material is a key factor of obtaining enhanced properties of cathode materials. In this work, we introduced solid electrolyte (Li-La-Ti-O) as a coating material on the surface of $Li[Ni_{0.3}Co_{0.4}Mn_{0.3}]O_2$ cathode. Specially, we focused on a rate performance of Li-La-Ti-O coated $Li[Ni_{0.3}Co_{0.4}Mn_{0.3}]O_2$ cathode. Both bare and Li-La-Ti-O 2 wt.% coated sample showed similar discharge capacity at 0.5C rate. However, as the increase of charge-discharge rate to 3C, the coated samples displayed better discharge capacity and cyclic performance than those of bare sample.