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Chrysaster ostensackenella (Fitch, 1859) (Lepidoptera: Gracillariidae) New to Korea
구준모,김슬기,조수원,Koo, Jun-Mo,Kim, Seulki,Cho, Soowon Korean Society of Applied Entomology 2019 한국응용곤충학회지 Vol.58 No.3
Chrysaster Kumata, 1961는 Gracillariidae (나비목: 가는나방상과)의 Lithocolletinae에 속해 있으며 우리나라에는 Chrysaster hagicola Kumata, 1961 한 종만이 알려져 있다. 본 연구에서는 동속의 국내 미기록종인 Chrtsaster ostensackenella (Fitch, 1859)를 처음으로 소개한다. 본 종의 유충과 성충은 Robinia pseudoacacia L. (콩목: 콩과)에서 채집되었다. 종 동정을 위한 특징과 간략한 기재를 제시하고, 성충과 수컷 및 암컷 생식기의 사진을 제공하였다. 최근 중국에서 양봉업에 매우 중요한 아까시나무의 심각한 해충으로 보고된 바 있어 본 종에 대해 조속한 추가 연구가 필요한 상황이다. The genus Chrysaster Kumata is one of the members in Lithocolletinae of Gracillariidae (Lepidoptera: Gracillarioidea). Chrysaster hagicola Kumata, 1961 has been the only known species of the genus in Korea so far. In this study, we report another species, Chrysaster ostensackenella (Fitch, 1859) for the first time from Korea. The samples of C. ostensackenella were collected as larvae and adults on Robinia pseudoacacia L. (Fabales: Fabaceae). Diagnostic characteristics with a brief description are given, as well as, photographs of adults and genitalia of both sexes are provided. A further study on C. ostensackenella is strongly recommended, especially for the business of honey, as this species is recently known to be a serious pest on acacias (black locust) in China.
이온교환과 제조 방법에 따른 Zeolite13X의 이산화탄소 흡착성능 연구
구준모(Jun-Mo Koo),박성권(Sung-Kwon Park),김형택(Hyung-Teak Kim) 한국에너지기후변화학회 2010 에너지기후변화학회지 Vol.5 No.2
??During the gasification of waste materials, syngas (mainly CO, H₂) can be used to convert to electricity by gas engine. However, it is not suitable for generating electricity because syngas has low heating value; 3,500~4,000 ㎉/㎏ in the gasification process. So incombustible CO₂ among the syngas is selectively required to separate for increasing heating value of syngas. This study is focused on developing CO₂ adsorbent which can adsorb selectively.<br/> ??Especially it is laid emphasis on elevating CO₂ adsorption performance using the commercial zeolite 13x adsorbent by ion-exchange of aqueous solutions.<br/> ??At the experiment for elevating CO₂ absorption performance, it is selected for ion-exchange solution such as NaCI, KCI, LiCI(univalent ion) and CaCl₂(bivalent ion).<br/> ??As 1M of four aqueous solutions hold zeolite l3x with 1hr ion-exchange, zeolite 13x with NaCI ion-exchange shows the highest adsorption quantity.<br/> ??Then it was certificated that ion-exchange structure and ion concentration of CO₂ adsorbent are respectively analyzed by XRD, XRF, ICP. also adsorbent is that add organic binder and inorganic binder, CO₂ adsorption performance is measured by on-line gas analysis.
습식법으로 제조된 BN 중간층을 가진 C<SUB>f</SUB>/SiC 복합재의 제조 및 물성 평가
구준모(Jun-mo Koo),김경호(Kyung Ho Kim),한윤수(Yoonsoo Han) 한국표면공학회 2017 한국표면공학회지 Vol.50 No.6
In this study, we developed the h-BN interphase for ceramic matrix composites (CMCs) through a wet chemical coating method, which has excellent price competitiveness and is a simple process as a departure from the existing high cost chemical vapor deposition method. The optimum condition for nitriding an h-BN interphase using boric acid and urea as precursors were derived, and the h-BN interphase coating through a wet method on a carbon preform of 2.5 D was conducted to apply the optimum conditions to the CMCs. In order to control the coating property via the wet coating method, four parameters were investigated such as dipping time of the specimen in the precursor solution, the ratio of boric acid and urea in the precursor, the concentration of solution where the precursor was dissolved, and the cycle of dipping and dry process. The CMCs was fabricated through polymer impregnation and pyrolysis (PIP) processes and a three-point flexural strength test was conducted to verify the role of the coated h-BN interphase.