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강세란,김영우,황덕기,김시영,이민규,주창식 한국환경과학회 2003 한국환경과학회지 Vol.12 No.6
A recycling process for the waste FRP from boats was developed. The recycling process is composed of decomposition of waste FRP with propylene glycol and synthesis of recycled unsaturated polyester resin from the decomposed liquid material. Prior to the decomposition, waste FRP was cut into 2cm × 5cm segments and mechanical impact was applied by press roller to give gaps between cumulated laminates. Propylene glycol effectively decomposed the waste FRP segments and glass fibers were easily separated from decomposed liquid material. Recycled unsaturated polyester resin could be made from the decomposed liquid material by reaction with maleic anhydride and phthalic anhydride.
AP2/EREBP Transcription Factors in Rice
Kim, Yun-Ju,Jung, Eui-Whan,Hwang, Seon-Hee,Go, Seong-Joo,Hwang, Duk-Ju The Korean Society of Plant Pathology 2004 Plant Pathology Journal Vol.20 No.1
Plants have the ability to defend themselves against pathogens by activating a series of defense responses. SA is known to be a signal molecule in plant defense responses. Nevertheles, SA is not the only one signal mediating defense responses. In addition to SA, ethylene and jasmonic acid have also been known to mediate plant defense responses against pathogens. The activation of a series of plant defense responses is known to be through varieties of transcription factors. Specially AP2/EREBP transcription factors are involved in ethylene mediated defense signaling. In this review, recent progress on AP2/EREBP transcription factors in arabidopsis, tomato and tobacco and a few of AP2/ EREBP transcription factors in rice related to biotic stresses will be discussed.
Charactrization of OsNAC69 gene related to bacterial leaf blight resistance
Eun-Shil Kwak,Eun-Mi Cha,Duk-Ju Hwang,Il-Pyung Ahn,Shin-Chul Bae,SangRyeol Park 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Plant specific gene family, NAC (NAM, ATAF, and CUC) transcription factors have been characterized for their roles in plant growth, development, and stress tolerance. In this study, we isolated OsNAC69 gene and analysed expression level by inoculation of bacterial leaf blight pathogen, Xanthomonas oryzae pv. oryzae (Xoo). NAC transcription factor family can be divided into five groups (I–V). On the basis of phylogenetic analysis, OsNAC69 was fall into group II. OsNAC69 was strongly induced 1 hr after infected with Xoo. To investigate its biological function in the rice, we constructed vector for overexpression in rice, and then generated transgenic rices. Gene expression of OsNAC69-overexpressed transgenic rice lines were analyzed by northern blot. Analysis of disease resistance to pathogen Xoo, nine OsNAC69-overexpressed transgenic rice lines showing high expression level of OsNAC69 were shown more resistant than wild type. These results suggest that OsNAC69 gene may play regulatory role during pathogen infection.
Generation of bacterial blight resistance rice with OsNAC58-overexpressing
Eun-Shil Kwak,Ga-Hee Park,Duk-Ju Hwang,Il-Pyung Ahn,Shin-Chul Bae,Beom-Ki Kim,Sangryeol Park 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07
Plant specific gene family, NAC (NAM, ATAF, and CUC) transcription factors have been characterized for their roles in plant growth, development, and stress tolerance. In this study, we isolated OsNAC58 gene from rice and analysed expression level by inoculation of bacterial leaf blight pathogen, Xanthomonas oryzae pv. oryzae (Xoo). NAC transcription factor family can be divided into five groups (I–V). On the basis of phylogenetic analysis, OsNAC58 was fall into group III. 35S::OsNAC58-GFP fusion protein was localized on the nuclei. To investigate its biological function in the rice, we constructed vector for overexpression in rice, and then generated transgenic rices. Gene expression of OsNAC58-overexpressed transgenic rice lines were analyzed by northern blot. Analysis of disease resistance to pathogen Xoo, twelve OsNAC58-overexpressed transgenic rice lines showing high expression level of OsNAC58 were shown more resistant than wild type. These results suggest that OsNAC58 gene may play regulatory role during pathogen infection.
유류고형화제에 의한 유함유 폐수 중의 유류 제거 공정 개발
주창식,홍성수,황덕기,김영일,박흥재,정성욱 한국환경과학회 2001 한국환경과학회지 Vol.10 No.6
For the purpose of developing a new process for the elimination of oil components from oily waste water, experimental researches using oil gelling agent were performed. The process is composed of three units, that is, decantator, gelling column and adsorption column. l0g of gelling agent in the gelling column could effectively absorb 15.65g of oil from ship washing waste water and 16.93g of oil from steel industry waste water. COD in waste waters dramatically diminished not in the gelling column but in the adsorption column. The gelling is hindered by other organic components in waste water, and the optimum space time for the gelling column is 20min. lg of gelling agent absorbed 3.7-4.0g of oil from waste waters with 25 min in the batch operation.
유기추출제를 이용한 산화아연 폐기물로부터 아연의 선별 침출 및 산화아연 제조
주창식,천재기,이석희,하홍두,정갑섭,황덕기 한국환경과학회 1998 한국환경과학회지 Vol.7 No.3
An experimental research was preformed for the development of an effective process for zinc oxide waste(zinc ash) reuse. Zinc was selectively leached from zinc ash by 30 vol.% D_2EHPA in kerosine solution, and the leaching velocity was quite fast. Zinc leached was stripped by sulfuric acid solutions, and the amount of zinc stripped was linearly increased with the amount of sulfuric acid used. Zinc oxide fine particles were obtained by dropwise adding of sodium hydroxide solution to the resultant aqueous zinc solution at 85℃.