In this study, an oxygen plasma treatment was used as a low temperature debinding method to form a conductive copper feature on a flexible substrate using a direct printing process. To demonstrate this concept, conductive copper patterns were formed on polyimide films using a copper nanoparticle-based paste with polymeric binders and dispersing agents and a screen printing method. Thermal and oxygen plasma treatments were utilized to remove the polymeric vehicle before a sintering of copper nanoparticles. The effect of the debinding methods on the phase, microstructure and electrical conductivity of the screen-printed patterns was systematically investigated by FE-SEM, TGA, XRD and four-point probe analysis. The patterns formed using oxygen plasma debinding showed the well-developed microstructure and the superior electrical conductivity compared with those of using thermal debinding.

본 연구는 한국산 녹슬은방아벌레아과(방아벌레과)의 분류학적 연구를 위하여 1984년 4월부터 1986년 9월까지 경기도 수원근교와 남해안지역(해남, 완도, 목포, 남해), 강원 충북지역(춘천, 충주)과 제주도에서 채집한 표본과, 서울대학교 농과대학 및 농촌진흥청 농업기술연구소 소장표본을 분류, 동정하였다. 아울러 문헌상의 기록을 종합, 정리한 결과 2속 10종 1아종이 밝혀졌으며, 그중 3종 (Agrypnus setigera, A. miyamotoi, A. hypponicola)은 한국 미기록종으로 기재한다.

Miscanthus is one of the important crops for bioenergy feedstock. Applicable molecular makers would be useful for development of valuable cultivar with enhanced biomass. Microsatellites as a co-dominant are widely useful for many applications in plant genetics and breeding such as genetic diversity analysis, cultivar identification, and marker-assisted selection. In order to develop novel EST-SSR markers for genetic improvement, we obtained the EST sequence data from the constructed cDNA libraries using a leaf and rhizome organs in the M.sinensis and M.sacchariflorus. SSR motifs were identified by SSR search-module program SciRoKo software. The number of SSR motifs was 1,724 in M.sinensis (leaf: 948, rhizome: 776) and 1,158 in M.sacchariflorus (leaf: 549, rhizome: 609). The most common repeat was tri-nucleotide followed by tetra-, di-, penta-nucleotide. CCG and AGC motifs were detected the most abundant repeat type in tri-nucleotide. We used an ORF Predictor program to screen the SSR location in the genome. The majority of the motifs were located in the ORF regions than the untranslated regions (UTRs). Especially, the tri-nucleotide was localized in the ORF regions, whereas di- and tetra-nucleotide were frequent in UTR regions. Based on SSR-containing sequence of the M.sinensis (leaf), 228 primer pairs were designed using Primer3 program. Randomly selected 20 primer pair was firstly screened using genomic DNA for their effectiveness to amplify SSR fragments of the expected size and to detect allele polymorphism. Fourteen out of total twenty primer pairs (70%) were successfully amplified. The remaining SSRs will be further screened and reported. When confirmed, those SSRs will be used for studying genetic diversity of the collected Miscanthus germplasm.