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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.
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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).
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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.
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Dienes 염색법을 이용한 마이코플라스마성 식물병의 진단과 몇가지 염색방법의 개선
신현동,나용준 한국응용곤충학회 1984 한국응용곤충학회지 Vol.23 No.4
Dienes 염색법을 국내에 발생하는 마이코플라스마성 식물병의 진단에 적용해 보면서 본 염색법의 보다 효과적인 이용을 위한 실험에서 얻어진 결과를 요약하면 다음과 같다. 1 Dienes 염색법을을 통한 식물 마이코플라스마병의 진단방법은 일일초와 뽕나무에서만 지정적이었고, 대추나무, 오동나무 및 붉나무에서는 부정적이었다. 2. Dienes 염색액의 와 수용액이 일일초와 뽕나무에 각각 적합했으며, 염색시간은 분 그리고 탈색시간은 분이 좋았다. 3. 정확한 현미경적 관찰이나 선명한 사진을 위해서 절편의 두께는 가 적당하였다. 4. 공시식물의 각 부위중에서 줄기 정부 바로 밑의 부위가 좋은 결과를 나타냈으며, 엽병이나 중륵도 거의 동등한 결과를 나타냈다. 5. 이병식물에서 염색반응의 정도는 병세와 비례했으며, 병징발견 초기의 시료는 건전시료와 염색반응에 있어서 쉽게 구별되지 않았다. 6. 시료를 종절할 경우 대부분의 관요소들이 상처를 받지 않을 뿐만 아니라 정확한 관찰이 용역하므로 시료를 횡절할 경우보다 효과적이었다. 7. 염색된 시료를 현미경 관찰할 경우 filter를 사용하지 않고 텅스텐 적색광을 그대로 사용하면 사관요소와 도관요소 간의 색갈 대비를 증가시키며 정확한 해석에 도움을 주었다. 8. 시료를 고정액에 고정시키면 염색반응이 방해되었으며, 시료는 신선한 것일수록 염색반응이 뚜렷하였다. Mulberry dwarf, paulownia witches' broom, jujube witches' broom, and sumach witches' broom are known to be associated with mycoplamalike organisms(MLO) in Korea. Simple microscopic detection of MLO infection in these plants was attempted. Periwinkle plant was also tested. Application of solution of Dienes' stain gave diagnoatic value for MLO-induced diseases of periwinkle and mulberry. Among the various plant parts examined, young herbaceous stem just below the apical part gave the best result. Density of staining reaction was proportional to disease severity. Longitudial sections were superior to transverse sections in confirming MLO infection by staining. Light source without blue filter was useful for increasing the color contrast between sieve tube and xylem vessel and for eliminating misinterpretation. Paulownia, jujube, and sumach samples gave no clear difference in staining reaction between healthy and diseased sections even when various modifications of Dienes' staining procedure were tried.
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LPG-톨루엔 겸용 저온 촉매버너의 연소특성에 관한 실험적 연구
서용석,강성규,류인수,신현동 공주대학교 자원재활용 신소재 연구센터 1999 1차년도 센터 성과집 Vol.1999 No.-
The aim of this study is to investigate the characteristics of the catalytic burner to burn LPG and toluene alternately which can be applied to the dryer of an acryl coating process of textile. It was difficult to obtain complete conversion when the catalytic bumer was installed to downward direction. The catalytic bumer was improved by introducing the forced diffusion combustion air and the premixing air. The optimal operating conditions for the newly improved catalytic burner were obtained. The catalytic bumer for toluene mixture was also investigated to incinerate toluene mixture exhausted from drying process. Results showed that the catalytic bumer could oxidize toluene mixture completely at the proper operating conditions. Finally, the catalytic burner to burn LPG and toluene alternately was applied to the dryer of acryl coating. By using the catalytic burner, benefits of energy savings and environmental protection were obtained.
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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.
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