적층각 변화에 따른 복합재료 회전익의 구조적 연성에 관한 연구

변창환,유용석,오택열 경희대학교 산학협력기술연구원 1997 산학협력기술연구논문집 Vol.3 No.-

This study is made allowance for using one dimensional modeling method that extracts equivalent stiffness matrix used the reduction of degree of freedom in order to sufficiently express the cross section of rotor blade and the material properties of composite. Modern helicopter rotor blade which are made from anisotropic material is very important a subject on the tailoring based on coupling tearms by changing of ply angle. In basing on this, we have searched for coupling terms by changing of ply angle of composite rotor blade and the dynamic behaviour of rotor blade for each coupling term.

재발성 가와사끼병의 임상양상과 검사소견

유승택,최은정,이창우,오연균,박승택,윤향석 圓光大學校 醫科學硏究所 2003 圓光醫科學 Vol.18 No.2

고령화 사회를 위한 노인의 영양서비스 요구도 조사

오유진;장유경;원선임;서종려 한양대학교 2005 韓國 生活 科學 硏究 Vol.25 No.1

The survey conducted by individual interviews. Subjects were adults aged 60 and over, recruited from three elderly schools in N city in Kyung-gi province(n=95). In the survey, subjects were interviewed for general characteristics, interesting nutrition topics, preferred methods of nutrition service. Subjects were interested in topics such as ‘anything about nutrition’(41%), ‘healthy eating’(31%), ‘diet with taking medicine’(17%), and ‘nutrition counseling’(12%). As methods of nutrition service, Subjects wanted primarily to use lectures in school(27%). Nutrition education program(29%), booklets(25%) were other commonly cited methods. These results provide baseline information for developing nutrition service and methods for elderly.

Nitrilotriacetatonickelate(Ⅱ)와 Copper(Ⅱ)간에 금속이온 치환반응속도

吳相牛,朴裕哲,金昌洙 경북대학교 교육대학원 1974 논문집 Vol.5 No.-

The reactions between copper (Ⅱ) and nitrilotriacetatonickelate (Ⅱ) have been studied from pH 2.6 to 3.5 at an ionic strength of 1.0 and a temperature of 50℃. The reaction order in copper (Ⅱ) concentration is first order. The pseudo-first order rate constant is given by the expression k_0=k_1+k_1'[H^+]+k_2'[H^+]/[Ni^+2]. The expression is similiar to that for metal-exchange reaction between metal ion and polyaminocarboxlylate. The values of rate constants k_1, k_1' and k_2' were 1.02×10 exp(-3) sec^-1, 0.43 mole^-1 ℓ sec^-1 and 4.41×10 exp(-3) sec^-1, respectively. And also the mechanisms of copper (Ⅱ) and nickel (Ⅱ) exchange-reaction are discussed. The equation of the exchange reaction can be expressed by three pathways.

자성포착제를 이용한 폐수중의 중금속 이온처리에 관한 연구

吳相午,朴裕哲,金昌洙 慶北大學校 1978 論文集 Vol.25-26 No.-

The contaminants, such as As, Pb, Cr, Hg, and Cd are chemically associated with magnetic seeding material and subsequent removal of this seed sweeps the pollutants from the waste water containing the heavy metal. The principle of operation of high gradient magnetic separation devices is the interaction between magnetic forces and competing gravitional hydrodynamic and interparticle forces within the magnetic separator. The advantage of treatment by high gradient separation over conventional techniques is the high speed and large capacity of magnetic filtering device. Ferrite and δ-FeOOH have been found to be especially efficient for removing the heavy metal from waste water containing the heavy metal. The heavy metal is easily removed by high gradient magnetic separation. Mechanism for removing the heavy metal from the waste water have been proposed to be adsorbed on the surface of magnetite and substituted iron of Ferrite or δ-FeOOH by the other metal.

Chromium picolinate가 고지방, 고설탕 식이를 섭취한 흰쥐의 체내 포도당, 지질 농도에 미치는 영향

오유진,진윤경,장유경 漢陽大學校 韓國生活科學硏究所 2001 韓國 生活 科學 硏究 Vol.- No.19

This study was carried out to investigate the effect of chromium picolinate supplementation on the metabolism of rats. Male Sprague-Dawley rats were divided into 3 groups and each group had 16 rats. Three experimental diets of CT(control), HS(high sucrose) and HF(high fat) were fed for 10 weeks and then chromium picolinate were supplemented to HS and HF groups for 6 weeks. Eight rats from each group were sacrificed after 10 weeks and another 8 rats from each group were sacrificed after 16 weeks. The results from this experiment were summarized as follows: The change of calorie intake and body weight was not significantly different among three groups after chromium picolinate supplementation. The plasma glucose and insulin concentration in CT group tended to increase after 16 weeks but those in HS and HF groups tended to decrease after chromium picolinate supplementation. The plasma triglyceride and cholesterol concentration of CT group tended to be higher than those of HS and HF groups which were supplemented by chromium picolinate. Our results indicate that chromium picolinate tend to reduce blood glucose, insulin, triglyceride, and cholesterol level but increase HDL-cholesterol level.

Effects of Dietary Fatty Acids on Serum Lipids and Fatty Acid Composition of Serum Phospholipids in Men

Oh,Eun-Joo,Kwon,Jong-Sook,Chang,Yu-Kyung 韓國營養學會 1997 Journal of Nutrition and Health Vol.30 No.4

Purge & Trap-GC를 이용한 의약품 필름코팅 정제 중 잔류용제에 관한 연구

장준식,이명자,소유섭,문춘선,이주헌,박희라,김진숙,강경모,이선옥,방성연,유미자,유문균,금오성,이병욱 식품의약품안전청 2000 식품의약품안전청 연보 Vol.4 No.-

의약품은 약물을 생체에 적풋하기 위하여 유효성분의 효과가 언제나 일정하게 확보되고 사응에 편리하도록 만들어지는 것이므로 유효썽분 이외에 약효에 영향을 주지 않는 성분이 첨가되는 경운가 많다. 이 때 사용되는 용매들은 제피의 광택 및 건쪼시간의 단축 등을 위하여 휘발점이 낮을 용매들이 주로 사용되어진다. 본 연구는 의약품 필름코팅정제 중 잔류용매 4종(chlorofonr benzen, trichloro ethylen, 1,4-dioxane)에 대한 변형된 pirge & trap-GC 장치를 이용한 동시분석방법을 개발하였으며, 각 표준품의 RSD 값은 chloroform 3.03%, benzen 3.17%, trichloroethylen 3.69% and 1,4-dioxane 3.41%였다. 또한 시중 유통중인 의약품 50종에 대하여 잔류웅매 양을 측정하였으며, 검출되는 잔류용매는 한 건도 없었다. This study nras carried out to develope the analytical method for the mixture of chlorefonn, benzen, trichloroethylen and 1,4-dioxane simultaneously and determine the remainingorgauic solvents in coating tablets by Purge & Trap-GC. The results were as follouFs ; 1. Chloroform, benzen, trio:tloroethylen and 1,4-dioxane separated by tenax #5 trap by HP-624GC column by terrlperature programming. The peaks were separated completely at retentiontime of 6.88min for chloroform, 8.21min for benzen, 10.38miu for trichloroethylen and 11.95minfor 1,4-dioxane. 2. Standard RSD were individually chloroform 3.03%, benzen 3.17%, trichloroethylen 3.69%and 1,4-diorane 3.41%. 3. 60 samples were not detrcted chloroform, benzen, trichloroethylen and 1,4-dioxane.

자동차 배기정화용 촉매에 관하여 : NO와 CO제거를 위한 촉매제

박유철,오상오,김창수,구본권 경북대학교 교육대학원 1980 논문집 Vol.12 No.-

The reactions of nitric oxide with hydrogen, carbon monoxide and hydrogen-carbon monoxide mixture have been investigated over the catalysts supported on alumina. In NO-H_2 System the relative activity of catalysts was decreased in the order as Pd>Ru>Pt>Os, while it was Ru>Pd<Pt<Os in NO-CO system. The relative activity sequence of catalysts in NO-H_2-CO system was similiar to that in the mixture of nitric oxide and carbonmonoxide. The inverstigation on the effectiveness of air-fuel ratio for the purification of exhaust gases has also been carried out over alumina supported ruthenium and palladium. Of exhaust gases the nitric oxide conversions were decreased slowly with increasing the air-fuel ratio, while the carbon monoxide conversions were increased slowly under the same condition. In this experiment the best value of air-fuel ratio was 14.5. In the nitric oxide conversions, the ruthenium and palldium of catalysts used were not so much inhibited by carbon monoxide.

식사관리와 영양지식에 관한 연구

이효지,장유경,오은주,유차숙 漢陽大學校 韓國生活科學硏究所 1989 韓國 生活 科學 硏究 Vol.- No.7

The purpose of this study was to investigate meal management and nutrition knowledge of the housewives according to their region, age, educational level, income and occupation. The subjects consisted of 2082 housewives residing in big city, middle or small city and agricultural and fishing villages. The portion of housewives living in the middle or small city was 44.1% and the major portion of age distribution was 30's(34.2%). More than half of the housewives(58.5%) had a job. Meal management included in this sutdy was their attitude for meal, nutritional balance in their dishes and harmonizing nutrition knowledge in the life. The meal attitude of the housewives who had no job was the lowest score. Dishes arrangement and harmonizing nutrition knowledge in the life were shown the highest score at the age of 60's. They had experience of nutritional education(63.8% ), The source of nutritional information were in order of TV., radio, relatives & neighbors, newspapers and magazines. The average score of nutrition knowledge was 7.07 out of possible 10 point. Nutrition knowledge had significant correlation with region, age, educational level and income. With increasing educational level, income and decreasing age, the score of nutrition knowledge was getting higher. Also, the housewives of urban was the higher in the nutrition knowledge score than those of rural. The frequency of food intake appeared at the higher in fruits, milk & products than meats & fishes, fishes of eatable bone, yellow green vegetables, and frying and parching food etc.