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신현동 한국식물병리학회 1994 Plant Pathology Journal Vol.10 No.3
Occurrence of diseases in economic resource plants in Korea is poorly known. This paper reports short descriptions on symptom, occurrence condition, pathogen, and some phytopathological notes for each 10 fungal plant diseases new to Korea; leaf spot of Rosa multiflora with Seimatosporium discosioides causing leaf spot and defoliation, leaf blight of Equisetum arvense with Titaeospora equiseti causing leaf spot to leaf blight, leaf blight of Setaria viridis with Phyrenochaeta setariae causing leaf spot of Aster tataricus with Septoria astericola causing leaf spot and black spot, powdery mildew of Clematis fusca var. coreana with Erysiphe ranunculi causing powdery mildew and dwarfing, powder mildew of Ligularia stenocephala with Erysiphe galeopsidis causing powdery mildew and dwarfing, powdery mildew of Phlox subulata with Erysiphe cichoracearum causing powdery mildew and defoliation tar spot of Lonicera japonica with Rhytisma lonicericola causing tar spot and dwarfing, white rust of Pharbitis nil with Albugo ipomoeae-pandulatae causing white rust and deformation, and white rust of Achyranthes japonica with Albugo achyranthis causing white rust and defoliation.
White Blister Rust Caused by Albugo candida on Oilseed Rape in Korea
신현동,최영준,박미정,박지현 한국식물병리학회 2011 Plant Pathology Journal Vol.27 No.2
Oilseed rape, Brassica napus ssp. oleifera (DC.) Metzger, is grown worldwide for the production of vegetable oil for human consumption,animal feed, and biodiesel. In Korea, this crop has also been used as an important vegetable by harvesting the leaves in late winter or early spring or by picking the main flowering shoots just before the first flowers open. Since May 2004, typical symptoms of white blister rust disease on oilseed rape have been continuously found in several localities of Korea. Leaves of infected plants had whitish sori mostly on the lower surfaces and reddish violet blotches on the corresponding upper leaf surfaces (Fig. 1A-C). Representative samples were deposited in the herbarium (KUS-F20204, F22717,F24893).
밀폐공간에서 가스폭발에 의한 개구발생 후의 압력변화에 대한 해석
신현동,윤재건,조한창 한국산업안전학회 1999 한국안전학회지 Vol.14 No.3
A numerical study on gaseous explosion was carried out to predict the transient pressure behavior with the partial rupture in confined vessels. Equations, assumptions and solutions for central ignition of premixed gases in closed spherical vessels are proposed with various equivalence ratios of gas fuel, as CH₄ and C₃H_8, vent areas and vent opening pressures. Given vent opening pressure in a vessel, the magnitude of second peak pressure results from the vent areas and burning velocity, varied by equivalence ratio of gas fuel. In a living room of an apartment, the higher second peak pressure than the vent pressure is not appeared due to its large window areas. As vent opening pressure is higher, the larger damage by gaseous explosion is expected and the larger vent area is necessary for relieving the damage. In the same concentration, the gaseous explosion by propane rather than methane shows the larger damage due to its higher adiabatic flame temperature and equivalence ratio.
거대억새(Miscanthus saccagiflorus Geodee-Uksae 1)로 부터 고수율 셀룰로오스 제조를 위한 탈리그닌 최적화
정소연(So-Yeon Jeong),황인덕(In-Deok Hwang),이재원(Jae-won Lee) 한국산림바이오에너지학회 2019 산림바이오에너지 Vol.29 No.1
본 연구에서는 거대억새로부터 고수율 셀루로오스 제조를 위해 시료의 분쇄 사이즈와 반응시간 및 고액비에 따른 탈리그닌화를 수행하였다. 거대억새 탈리그닌화 시, 고액비 증가 및 분쇄 사이즈 감소, 탈리그닌화 반응시간 증가에 따라 리그닌의 감소가 뚜렷하였다. 가장 낮은 리그닌 함량 (8.52%)은 거대억새 3mm 사이즈로 고액비 1:20, 12시간 탈리그닌화 반응조건에서 확인하였다. 결정화도 분석을 통해 탈리그닌 후 고형바이오매스에서 결정화도 증가를 확인하였다. 퓨리에 변환 적외선 분광법으로 바이오매스 구성성분의 작용기를 분석한 결과, 탈리그닌화에 의한 셀룰로우스 제조를 위한 최적 조건은 고애비 1:20, 3 mm 거대억세 분쇄 사이즈, 12시간 탈리그닌 반응조건으로 확인되었다. In this study, the delignification of Miscanthus sacchariflorus Geodae-Uksae 1 was performed under different conditions of particle size, reaction time, and solid/liquid ratio to achieve high-yield cellulose production. The efficiency of lignin removal from biomass increased as the increasing of solid/liquid ratio, decreasing of particle size, and increasing of reaction time. The lowest lignign content measured was 8.52% when delignification of biomass was performed with a 3 mm particle size for 12 h with a solid/liquid ration of 1:20. The crystallinity index was increased by delignification, which was confirmed by X-ray diffraction analysis. In the Fourier-transform infrared spectroscopy (FTIR) showed that the spectral peaks corresponding to cellulose and hemicellulose were increased by delignification of biomass. According to the results of chemical and structural analyses, the optimum conditions for high-yield of cellulose production were a particle size of 3 mm. reaction time of 12 h, and solid/liquid ratio of 1:20.
신현동 高麗大學校自然資源科學硏究所 1997 自然資源科學硏究 Vol.5 No.-
This paper presents a list of the powdery mildew fungi and their respective host plants recorded up to date in Korea. Powdery mildew fungi belong to 13 genera and 110 species. The host plants species count 338 dispersed in 63 families, which comprises about 11.7% of angiosperms in Korea. Most of the plants were infected with one species of powdery midew fungus, but 24 plant species with two or three different midews. The flora of powdery mildew fungi is far from complete and additional investigation is necessary.