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엄병헌,김주선,안병태,강삼식,Um, Byung-Hun,Kim, Ju-Sun,Ahn, Byung-Tae,Kang, Sam-Sik 한국생약학회 1997 생약학회지 Vol.28 No.1
From the Evodiae Fructus, four flavonoids were isolated and identified as cacticin, limocitrin $3-0-{\beta}-D-galactoside$, hyperin and diosmin by means of chemical and spec-troscopic methods.
明日葉(神仙草)의 幼苗生長 및 化學成分에 대한 基礎的인 硏究
嚴秉憲,林雄圭 서울대학교 농과대학 농업개발연구소 1994 서울대농학연구지 Vol.19 No.2
The germination ratio at 35 days after sowing under contineous light was 30-40% higher than that under dark condition, and the highest at 25℃ and 20℃ with 65-75% germination percentage. The germination in GA solutions increasd gernimation rate. GA treatment on leaves increased plant height(30%) at 10ppm, 50ppm of GA. Brassinolide tretment on leaves increased fresh weight of roots at 1 ppm. But chemical fertilizer treatment decreased plant height. Germanium contents were analyzed by ICP(Inductively Coupled radiol frequency Plasma) method after igniting and dissolving samples by HCI. Leaflet(1143 ppb, fresh) contained Ge 2-3 times more than periole did. Ge contents in samples which has grown for 21 month were 20-30% higher than those for 9 months. On the basis of these results, A keiskei was considered to have the capacity of Ge accumulation. Upper root which was near shoot had more Ge than other parts of root, and this was the same phenamonon as ginseng root. Crude saponin content(dry w.t.) was 1.32% in leaflet, 0.86% in petiole. According to HPLC chromatogram, most saponins(above 90%)of A keiskei leaf were indentical with ginseng saponis, but some saponins was different with ginseng saponins. One saponin peak in HPLC chromatogram of leaflet saponins did not exist in that of petiole saponins of A keiskei. It was showed that most saponins(above 95%) of A keiskei leaf were triol saponins. The HPLC operation condition at which peaks of vitamin B₁, B₂, B??, B?? were separated well on one coulumn was set up by using Bonda-pak C?? coulumn. General chemical components of A keiskei leaf were determined. Water was 87.6g, crude protein 2.5g, crude fat 0.3g, crude fiber 1.3g, total sugars 7.09g, calorie 34 kcal, ash 12.3g, Ca 253㎎, P 53㎎, Fe 4.0㎎, Vitamin A 1076 I.U., vitamin B₁0.12㎎, vitamin B₂ 0.23㎎, niacin 1.0㎎ and vitamin C 25㎎ in fresh leaf 100g. It is expected that more studies on chemical components and product developments of A keiskei will be conducted in Korea.
장기유출(長期流出)의 수문적(水文的) 모형개발(模型開發)을 위한 주요(主要) 수계별(水系別) 단위도(單位圖) 유도(誘導)
엄병헌 ( Um Byong Hoyn ),박근수 ( Park Keon Su ) 한국농공학회 1984 韓國農工學會誌 : 전원과 자원 Vol.26 No.4
In general precise estimation of hourly of daily distribution of the long-term run-off should be very important in a design of source of irrigation. However, there have not been a satisfying method for forecasting of stationary long-term run-off in Korea. Solving this problem, this study introduces unit-hydrograph method frequently used in short-term run-off analysis into the long-term run-off analysis, of which model basin was selected to be Sumgin-river catchment area. In the estimation of effective rainfall, conventional method neglects the Soil moisture condition of catchment area, but in this study, the initial discharge (q<sub>b</sub>) occurred just before rising phase of the hydrograph was selected as the index of a basin soil moisture condition and then introduced as 3rd variable in the analysis of the reationship between cumulative rainfall and cumulative loss of rainfall, which built a new type of separation method of effective rainfall. In next step, in order to normalize significant potential error included in hydrological data, especially in vast catchment area, Snyder's correlation method was applied. A key to solution in this study is multiple correlation method or multiple regress-ional analysis, which is primarily based on the method of least squres and which is solved by the form of systems of linear equations. And for verification of the change of characteristics of unit hydrograph according to the variation of a various kind of hydrological charateristics (for example, precipitation, tree cover, soil condition, etc),seasonal unit hydrograph models of dry season(autumn, winter), semi-dry season (spring), rainy season (summer) were made respectively. The results obtained in this study were summarized as follows; 1. During the test period of 1966-1971, effective rainfall was estimated for the total 114 run-off hydrograph. From this estimation results, relative error of estimation to the ovservation value was 6%, -which is mush smaller than 12% of the error of conventional method. 2. During the test period, daily distribution of long-term run-off discharge was estimated by the unit hydrograph model. From this estimation results, relative error of estimation by the application of standard unit hydrograph model was 12%. When estimating by each seasonal unit bydrograph model, the relative error was 14% during dry season 10% during semi-dry season and 7% during rainy season, which is much smaller than 37% of conventional method. Summing up the analysis results obtained above, it is convinced that q<sub>b</sub>-index method of this study for the estimation of effective rainfall be preciser than any other method developed before. Because even recently no method has been developed for the estimation of daily distribution of long-term run-off dicharge, therefore estimation value by unit hydrograph model was only compared with that due to kaziyama method which estimates monthly run-off discharge. However this method due to this study turns out to have high accuracy. If specially mentioned from the results of this study, there is no need to use each seasonal unit hydrograph model separately except the case of semi-dry season. The author hopes to analyze the latter case in future sudies.
수문지역별 최적확률강우강도추정모형의 재정립 -영·호남 지역을 중심으로 -
엄병헌 ( Um Byong Hyun ),박종화 ( Park Jong Hwa ),한국헌 ( Han Kuk Hon ) 한국농공학회 1996 韓國農工學會誌 : 전원과 자원 Vol.38 No.2
This study was to introduced estimation model for optimum probabilistic rainfall intensity on hydrological area. Originally, probabilistic rainfall intensity formula have been characterized different coefficient of formula and model following watersheds. But recently in korea rainfall intensity formula does not use unionize applyment standard between administration and district. And mingle use planning formula with not assumption model. Following the number of year hydrological duration adjust areal index. But, with adjusting formula applyment was without systematic conduct. This study perceive the point as following : 1) Use method of excess probability of Iwai to calculate survey rainfall intensity value. 2) And, use method of least squares to calculate areal coefficient for a unit of 157 rain gauge station. And, use areal coefficient was introduced new probabilistic rainfall intensity formula for each rain gauge station. 3) And, use new probabilistic rainfall intensity formula to adjust a unit of fourteen duration-a unit of fifteen year probabilistic rainfall intensity. 4) The above survey value compared with adjustment value. And use three theory of error(absolute mean error, squares mean error, relative error ratio) to choice optimum probabilistic rainfall intensity formula for a unit of 157 rain gauge station.
韓國에서 달맞이꽃에 關한 硏究(Ⅴ報) : 基礎的인 硏究
洪在善,吳壽亨,嚴秉憲,林雄圭 서울대학교농과대학농업개발연구소 1989 서울대농학연구지 Vol.14 No.1
This experiment was conducted to obtain germination rate, weight of 1,000 grains, yield, and fatty acid contents of the evening primrose in Korea. The gremination rate, weight, yield and fatty acid contents of the seeds were found significantly different depending on the collection sites.
판철호,김은선,엄병헌,이재권 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.4
Flavonoids have biological activities including anti-allergic, anti-inflammatory, antimicrobial and anticancer activities shown from in vitro studies. Of these biological activities, the antiinflammatory capacity of flavonoids has long been emphasized in Chinese medicine. In this study, I investigated that what flavonoid can be applied to the suppression of lipopolysaccharide (LPS)-induced inflammatory responses in macrophages among the four similar structure flavonoids. Eriodictyol was found to reduce nitric oxide (NO) production from LPS-stimulated Raw 264.7 cells in non-cytotoxic concentrations. Moreover, eriodictyol strongly suppressed the phagocytic activity of activated macrophages. Pre-treatment of Raw 264.7 cells with eriodictyol reduced the expression of mRNA and the secretion of pro-inflammatory cytokines. These inhibitory effects were found to be caused by blockage of nuclear factor kappa-light-chainenhancer of activated B cells (NF-κB) activation and phosphorylation of p38 mitogen-activated protein kinase (MAPK), extracellular signal-regulated kinases 1 and 2 (ERK1/2) and c-Jun Nterminal kinase (JNK).