한국산 가시톡토기과의 분류학적 검토

이병훈,이원구,김학렬 全北大學校 生物學硏究所 1984 生物學硏究年報 Vol.5 No.-

A preliminary test concerning variabilities of some Tomoceridae species of collembola has been made using scanning electron microscopy and enzyme analysis. No definite taxono mical characters were detected in the integument of 6 species belonging 2 subgenera of Tomocerus genus. The zymograms obtained by electrophoresis, however, revealed that th subgeneric characters at times should be questioned for its monophyletic meaning as suggested by those of Tomocerus (Tomocerus) kinoshitai showing a particular pattern and Tomocerus (Tomocerina) liliputanus for its apprectable variability. The distinctive zymograms of T.laxalamella might also justify the creation of a new subgenus when considered in combination with the morphological characteristics of mucron. Neither population nor interspecific difference were observed, however, in and between T. cuspidatus and T. ocreatus, which would remain problematic and necessitate further works to confirm. Tomocerus laxalamella and T. liliputanus showed more of less variabilites whereas Homidia koreana of Entomobryidae, used as out-group for comparison, displayed a prominent individual variations in a few loci.

被陰이 韓國잔디의 生長에 미치는 영향에 관하여

李一球,金仁澤,裵秉鎬 건국대학교 1977 學術誌 Vol.21 No.2

For the evaluation of shade tolerance of the garden plant, the growth of Zoysia, japonica Steudel was anlyzed by varing the light intensities. Light level semployed in Exp. 1 were 5, 10, 15, 20, 25, 30, and 100% daylight; and those in Exp.]2 were 7, 15, 30, 60, 70, and 100% daylight. The varing light intensities were obtaind in both case with reed screens and nylon nylon screens supported on wooden frames (1.2m 1.2m 0.6m). 1. The growth of total plant dry weight showed high value in proportion to the increase of light intensity and was depressed markedly by deeper shading. 1) The growth in total plant dry weight : The depressive effect of shading (5 and 10% plots) on the growth of total weight was conspicuously marked. Afterwards, the total plant decreased in weight and finally failed to survive after 150 days of shading. 2) The growth in root dry weight (less than 25% plot) decreased gradually until it reach almost zero after 115 days of shading. 3) The growth in leaf dry weight (less than 20% plot) decreased gradually until it reached almost zero after 115 days of shading. But the later growth condition of the leaves in the 23 and 30% plots was roughly similar to the earlier period of growth. 2. In heavy shade (5, 10, 15, 20, 25, and 30%), the depression of grwoth by sahding was conspicuoulsy marked, while the growth of the lightly shaded plants (60 and 70%) showed the same effect as the growth in full light. 3. At first the relative value of each plant organ was extraordinarily similar between 25, 30% plots and 100% daylight. However the value markedly decreased at later periods. The relative value of 60 and 70% plots was roughly the same as in the 100% plot (control plot).

집중하중을 받는 변단면 보의 정적거동해석

이병구,모정만 圓光大學校大學院 1992 論文集 Vol.10 No.-

An analytical method was developed to tapered beams subjected to concentrated loads. The rectangular cross-section with constant width and variable depth, so-called depth taper, was chosen. The differential equation of deflected beams based on the small deflection theory was derived and solved by indefinite integration. The unknown parameters and integral constants were calculated by the boundary conditions. The hinged-hinged. hinged-clamped, clamped-clamped and clamped-hinged beams were considered in the numerical examples. As the results of this study, the reaction moments of left ends, the vertical reactions of left ends, the maximum deflections and the maximum stresses versus nondimensional position of concentrated load were presented in figures. Also both typical bending moment diagrams and deflection curves were presented in figures. It is expected that the results of this study including both all equations and figures can be used in design of the tapered beams.

완두의 忌地現象에 관한 硏究

李一球,裵秉鎬,李京淳 建國大學校附設 應用科學硏究所 1976 理學論集 Vol.2 No.-

In the growth of plants, they are under considerable, various influences of the atmospheric temperature, the amount of rainfall and the conditions of soil with which they have come in direct contact. It may be safely said that these influences are indispensably essential to plants. The phenomenon of soil sickness, however, is complelled to be noticed to a certain extent. The object of this work is to study the phenomenon of soil skckness-that is, a kind of allelopathy. In order to verify its importance in the first place, peas(Pisum sativum)were applied to the experimental materials. Their roots and stems collected last year(1974)were dried and reduced to powder. Some Soil, which was mixed with the powder in different quantity respectively, was put into pots for the purpose of cultivation peas. As peas grew higher, their own rates of growth were attentively examined and compared with one another. In the other kind of experiment, some water was provided a group of pots with peas that has already grown to a certain degree. Oozed out through the holes of the pots, some liquid was caught with care. On the second stage the liquid was mingled with water, to make its density different. This liquid was after offered other groups of peas. Under these differential conditions, aspects of the plants were likewise measured and compared. In this experiment, all peas, however, were cultivated under the same living condition of soil, water and sunlight, except these inhibitory substances. As the result, their growth rates evidenced characteristically a variety of distinctions, indicating the fact that the soil sickness should have remarkable effects upon plants.

鐵이온에 衣한 Hemoglobin의 酸化

李民化,梁誠烈,朴昞柱,姜亨求 全南大醫大 1986 전남의대학술지 Vol.23 No.2

우리나라 數學敎育過程의 變遷과 새 數學 運動(New Math.Movement)의 관계에 대해서

李炳守,具魯美 慶星大學校 1992 論文集 Vol.13 No.2

Views on the mathematical education are dependent on the views of the nature of mathematics. Accordingly the views of the nature of mathematics influences on the organization of the school curricula of mathematical education. In this paper we researched how the curricula of mathematical education in our country changed in connection with the new-math. movement and Back-to-basics movement about 1950 to about 1990.

복합재를 이용한 구조물의 균열보수 대책에 관한 연구

李晟熙,韓秀贊,韓秉基,具秉俊 弘益大學校 科學技術硏究所 1997 科學技術硏究論文集 Vol.8 No.-

Recently, composite materials have widely become available to engineers. This paper briefly explains the applications of these materials and shows how these materials can be used to repair structures with damages such as crack, notch, etc. Before the fatigue test, notched and repaired specimens with thin laminate composite are prepared. Also, test apparatus is designed to perform four point fatigue test of specimens. From the experimental result, it was found that present repair technique could be used to enhance the life of damaged structures.

크론병에 대한 CoPPLX의 방어효과에 대한 연구

이호학,김유림,문창기,이재일,양병윤,김종수,이정민,정재혁,안석진,박상준,김윤권,김소연,김영중,조민구,최영자,장성조 圓光大學校 醫科學硏究所 2005 圓光醫科學 Vol.20 No.1

성형조건에 따른 무연탄계 활성탄의 세공특성

이송우,나영수,김도한,류동춘,최동훈,류병순,송승구 한국화학공학회 2002 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.40 No.1

본 연구는 무연탄으로 활성탄을 제조할 경우 성형이 세공특성에 미치는 효과를 고찰한 것이다. 3가지 다른 방법으로 활성탄(파쇄형 활성탄, 압축성형 활성탄, 압축성형 활성탄)을 제조하여 특성을 비교했다. 이중에서 25%의 콜타르와 7%의 물을 혼합하여 압출 성형한 활성탄이 비표면적, 세공부피, 그리고 경도에서 가장 좋은 물성을 나타내었다. 압축 및 압출 성형체의 표면은 무연탄 원탄과는 달리 무연탄 분말이 바인더와 혼합되어 있으므로 매우 거친 상태를 나타내었고, 활성화시 거칠게 형성되어 있는 입자사이로 활성화제인 수증기가 쉽게 침투하여 많은 세공을 형성시킴을 알 수 있었다. 이렇게 형성된 세공을 통해 수증기 활성화반응이 잘 일어나 직경 3,000-50,000Å 범위의 거대세공이 발달하였다. 파쇄형 활성탄에 비해 약 2배의 거대세공(macropore)부피를 가지고 있었으며 경도도 30%에서 95% 이상으로 상승되었다. This study was to investigate the effect of granulation process on pore characteristics in manufacturing anthracitebased activated carbons. The activated carbons were made by three different methods to compare characteristics: the crushed activated carbon, the compressed activated carbon, and the extruded activated carbon. Among these activated carbons, the extruded activated carbon using a binder that consists of 25% coal tar and 7% water showed the best characteristics in specific surface area, pore volume, and hardness. Since the compressed and the extruded substances had coarser surfaces than a raw material, steam could penetrate easily through particles and produce macropores especially in the diameter ranges of 3,000-50,000Å during activation process. The extruded activated carbon showed about twice more macropore volumes than the crushed activated carbon and the hardness was increased from 30% up to 95%.

菊花의 忌地性과 이에 미치는 生長物質의 影響에 관한 硏究

李一球,張秉旭 건국대학교 1968 學術誌 Vol.9 No.1

The chrysanthemum, as a perannual plant, are propergated and transplanted by root division through years. This is because of causes that chrysanthemum are inhibited in growth and development at same places, In this work we researched the soil sick and effect of growth regulators in chry-santhemum plant, supposed that such bad growth of CHRY will have a same causes in the water washing of root through CHRY in Artificial methods. The results getted through this work are as following. (1) The water washing of root inhibited clearly the growth and become a cause of soil sick in chrysanthemum. (2) The much and less of inhibitors in chrysanthemum were influenced by the environment factors (day-length), especially the inhibitor resulted in short-day treatment inhibited the growth in Chrysanthemum (3) The growth regulators increased the resistances to soil sick, and its incorporation into CHRY controlled and inhibited the action of inhibitors (TAA of these is most effective). A sample variety of the same white small line of Chrysanthemum moliforium was used for the effects of W.W.R. on the growth and rooting of treated plant were observed, and effects of G.R in relation to sick soil of Chrysanthemum was measured to inhibit and remove the unfavorable actions of W.W.R on their growth and development. In all cases the W.W.R. of chrysanthemum inhibited the growth and rooting of their self-plant and the W.W.R. resulted under short-day inhibited all growth and rooting of than the other day-length. The G.R. increased the resistances to the soil sick in chrysanthemum and their incorporation into the leaves could moderate and inhibit the effectiveness of W.W.R.