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林土의 有機物의 分解速度와 無機養料의 垂直分布에 關한 考察
金遵敏,張楠基,鄭玩鎬 서울대학교 교육대학원 학술연구회 1966 論文集 - 서울대학교 교육대학원 Vol.3 No.-
Kim Choon Min, Chang Nam Kee and Chung Whan Ho: Decomposition rate of plant residue and the vertical distibution of mineral nutrients in the woodland soil. The relationship between decomposition rate of litter and the amount of mineral nutrients dispersed to the soil horizons were studied on the oak and pine forest stand. The results are as follows: 1. Decomposition rate of litter was highest in the F horizon of the oak stand, however in the pine stand it was highest in H horizon. 2. The correlation coefficients between decomposition rate and humus, organic carbon, moisture content, calcium, phosphorus, and nitrogen in the pine stand are; 0.90, 0.98, 0.76, 0.98, and 0.88, in oak stand; 0.97, 0.93, 0.92, 0.97, 0.74 and 0.73. 3. Factors which affect the decomposition rate of litter are humus, organic carbon, moisture content, calcium, phosphorus and nitrogen. 4. Among the variables, PH, moisture content and phosphorus under the oak and pine forest showed significant differences in each horizon. 5. C/N ratio of pine stands is higher than that of oak stands studied. 6. The vertical distribution of mineral nutrients is highly related with the amount of humus accumulated on top soil.
노시춘,방기천 남서울대학교 2011 남서울대학교 논문집 Vol.17 No.2
Economic crisis, efforts to overcome the digital contents industry development at home and abroad have been racing in the country's future lies in the digital contents industry. Therefore, the digital contents industry through vision, model identification knowledge-based global digital contents market-based deployment is required. For research purposes the digital contents industry to derive an alternative to national industrial development that will lay the groundwork. The deployment order for the first digital contents industry, SWOT analysis performed to derive the Korean-specific model. As a result, measures based on the advancement of digital content industry as a long-term vision and specific goals are presented as staged. The age of convergence of the u-media content markets in government, corporations, consumers, and these form the structure of a virtuous cycle distribution systems for energy by being active, synergistic effects are obtained. First of all internal and external content, industry-based to ensure that growth is key. Vision of the digital contents, the growth momentum of the national social development policies as a role model by changing the sequence of events need to go. Key Words :Digital Contents, Creative Industry, Digital Contents Policy, Vision Model
L_iF 紛末의 Exo-emission Parameter
李春鎬,李起芳 全北大學校 基礎科學硏究所 1978 基礎科學 Vol.1 No.1
We make use of a method for calculating the thermoluminescence(or T.L) parameters to deduce the activation energy and the frequency factor of Lif crystal powder from TSEE glow curve on the assumption that the second-order kinetics of TL is closely related to the exoemision of trapped electron. The activation energy, also, has been calculated by the method of Kelly and Laubitz for the calculation of the activation energy from two points of the glow peaks. The deduced values of the activation evergy and the frequency factor of LiF pawder at peak temperatures 120℃ and 225℃ are 1.34±0.12ev, 1.65±0.01ev, and 4.2×10 exp (-18) sec and 6.3×10 exp (-16). According to the result of the study, we may conclude that the exo-emission of LiF powder follows the second-order kinetics of thermoluminescence.
백일해 백신이 Streptozotocin 유발성 당뇨백서의 당대사에 미치는 영향
박상기,문경래,박춘호,김갑승,박영봉,이병래,양남웅 朝鮮大學校 附設 醫學硏究所 1991 The Medical Journal of Chosun University Vol.16 No.1
Streptozotocin(STZ) may produce a permanent form of insulin-dependent diabetes (IDD) in experimental animals. This STZ-induced diabetes has become an useful model to study the pathogenesis of IDD in man primarily because it approximate clinical findings and also because it lends itself easily to controlled manipulation. The diabetogenic activity of STZ, however, is known to be modified by several agents such as nicotinamide, diazoxide, adrenergic blockers and pertussis vaccine (PV). The present study was undertaken to observe the protective effect of PV or boiled pertussis vaccine(bPV; incubating the PV at 80℃ for 30 minutes) against the development of IDD induced by STZ in young rats, and also the effect of PV on the activities of glycolytic & gluconeogeneic enzymes in both liver and muscle of rat. PV at a dose of 1.2×10^(10) microorganism was administrated intrapntoneally on 3days before & 7days after a single injection of STZ (GO㎎/㎏ body wt). The blood glucose and insulin levels were measured at 1st wk, 2nd wk, 4th wk, 6th wk and 8th wk after STZ injection, and the enzyme activities were exemined at 8th wk. The following results were obtained. 1. No significant difference was noted in blood glucose levels between STZ group and STZ+PV or STZ+bPV groups (P>0.05). 2. Blood insulin levels in STZ group decreased significantly from 2nd wk(P<0.05). Compared with STZ group, blood insulin levels in STZ+PV & STZ+bPV groups were higher, but not a significant value except at 2nd wk in STZ+PV grouP (P<0.05). 3. Compared with STZ group, hepatic glycolytic enzyme activities were significantly increased in STZ+PV or STZ+bPV groups, and muscular glycolytic enzyme activities were significantly increased in STZ+PV or STZ+bPV groups. 4. Compared with STZ group, hepatic gluconeogeneic enzyme activities were significantly increased in STZ+PV or STZ+bPV groups. These results suggest that the PV has somewhat protective effects on blood insulin levels and tissue glycolytic enzyme activities in rats, but it could not reduced blood glucose levels significantly, probably because of excessive increase of hepatic gluconeogeneic enzymes.
李吉春,沈基五 단국대학교 1995 論文集 Vol.29 No.-
A study on the effect of the angle between the channel and the bridge piers on the increase in water level in the case of a sloped channel was carried out and the following conclusions were made. When the angle between the channel and the piers of 0°was taken as reference, the percentage rise in water level with the incline exhibited a maximum at 45°. That is the grater the slope, the more intense was the percentage rise in the water level; 11%, 5%, 3% and 3% when the slope was 1/200, 1/300, 1/400 and 1/500 respectively. When the percentage rise in the water level with the magnitude of the angle between the channel and the piers was averaged over various slopes, the average increase was 2.3%, 4.5% and 5.5% for 15°, 30° and 45° showing a gradual increase. Application of the Froude number, which is a characteristic factor of an open channel, suggested that the flow of water was inferior when the slope was steeper, while the opposite condition was observed when no hydraulic structures (piers) were present. Since increases in the slope and the angle between the channel and the piers restrict the flow of water, care must be exercised in the design of hydraulic structures, especially those for urban small channels, when steep slopes and excessive angles between the channel and the piers are to be utilized.
Drosophila busckii의 韓國集團에서 있어서 同位酵素 多形現象
成耆昌,尙椿植,金彧,金大鎰 성균관대학교 기초과학연구소 1985 論文集 Vol.36 No.1
Genetic structure and variability were investigated in four Korean populations of Drosophila busckii. Eight allozyme loci were analysed by means of starch gel electrophoresis. The proportions of polymorphic loci and loci heterozygous per individual were estimated to be 0.25 and 0.051, respectively. The average genetic similarity between four populations was found to be S―=0.977. This value is similar to the other Drosophila populations reported. However, the gene variation of D. busckii in this study appeared to be the least variable among 28 Drosophila species reported. It is suggested that the low gene variation in D. busckii might be due to adaptation of this species to a narrow niche, but the possibility of occurrence of the random drift cannot be excluded.
崔春泰,李起芳 全北大學校 基礎科學硏究所 1980 基礎科學 Vol.3 No.1
The adsorption phenomena of the metal surface can be ascribed to the Van der Waals force. We estimated the Van der Waals interaction between inert gas and the crystal surface (100), (110), and(111) of the transition metal Ag and Cu employing the equation of Mahanty-Taylor. Calculating the adsorption energy, we assumed that as inert gas adsorbed on the metal surface has close-packed structure, the surface is non-activated unifrom, and there is no lateral interaction between adsorbed adspecies. It is found that the adsorption energy of an inert gas adsorbed on Cu almost equals to that of the same element on Ag surface, while the adsorption energy increases as the mass of inert gas element increases.
태양열 온수급탕 시스템에 관한 연구 : 아파트를 중심으로 With relevance to Apartment
송인춘,김기세,구현덕,김병수,나기태 忠南大學校 産業技術硏究所 1999 산업기술연구논문집 Vol.14 No.1
This work was carried out to propose a model of the most effective layout and installation for applying the Solar Hot Water system to apartment and to offer the basic data for promoting the destribution of this Solar Hot Water system in the country. For this purpose, the performed experiments are as followings: 1)Measurement and analysis of the amount of hot water adn the cost of water used in apartment of which the area is 30 to 40 pyung. 2)to esimate the efficiency of Solar Hot Water System in accordance with an angle of inclination. 3) Analysis of economical efficiency the annual expected saving cost produced by replacing the existing hot water system with the Solar Hot Water System. 4)Proposal of the best model for installing the Solar Hot Water System in apartment by considering the place and sunshine,and compaison of merit and demerit of this system.