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崔榮善,牟壽美 대한보건협회 1977 대한보건연구 Vol.3 No.1
A dietary survey of 153 preschool children ranging in age from one to five years among slum population in Seoul, was carried out from July to August of 1976. The survey involved the food intake, nutritional and anthropometric data. The food intakes of individuals were analyzed using the 24-hour recall method through the family interview with the mothers or the family members responsible for the child care. The survey revealed the following: SOCIO-ECONO STATUS The average family size of household was 8.5 persons and nearly 26% of families had more than four children. Seventy per cent of fathers were ranged in age of 31 to 40 years and over 70% of mothers were in age of 26 to 35 years. About 78% of mothers and 50% of fathers received primary school education or less. Sixty five per cent of fathers were wage earners or vendors. The average duration of residence in this area was five years and two months. The average monthly income of surveyed groups were in the range of ₩30,000 to ₩60,000 indicating the majority of families are living in poverty. Engel index was 67%. DIETARY INTAKE The general patterns of their diets were shown, cereals and vegetables contributing the, major shares to the intakes of both energy and protein. On the whole the energy and all nutrient intakes were found lower than the recommened dietary allowance. Only one fourth of the daily protein intake was derived from animal sources. The intakes of calcium and riboflavin decrease with age increase due to presumably decreased consumptions of milk. The total energy intakes of protein and fat were 9.9 to 11.9% and 9.5 to 15.7%, respectively. FAO protein scores were shown 72.5 to 87.4. The first limited amino acid was lysine in all age groups. Generally, the diets of 2-and 3 year-old children were poor. As to nutrient intakes by birth order, the first and second born children were, in general, of higher intake, as compare to those of the third and later born children, but its difference was not statistically significant. PHYSICAL STATUS In the physical status, the observed heights and weights of the children were expressed as a percentage of Korean standards of 1975 report. All of the subjects were shown above 80% height for age of Korean standards, and nearly 24% of the subjects lower than 90% weight for age, and 8.5% of the children lower than 80% of the standards. The data of arm circumference for age showed that 24.8% of the subjects were lower than 85% of Jelli-ffe's standards and 8.5% of the children lower than 80% of the standards. Thus, 8.5 to 23.5% of the sujects could be classified as protein calorie maluntrition.
崔英鮮 忠州大學校 1998 한국교통대학교 논문집 Vol.33 No.2
The composition of optical rotatory dispersion came is utilized as a technique to determine wheather or not an optical active ligand is complex having absorption bands at wave lengths different form those of ligand. It is also noted that the rotatory strength(magnitude of optical rotation) of a complex containing an optically active substance which behaves as a bidentate ligand is noticeably greater than the rotatory strength observed when the same substance behaves as a monodentate ligand.
A型 Zeolite에 依한 n-Alkane의 吸收 影響에 關한 硏究
崔英鮮 忠州大學校 1989 한국교통대학교 논문집 Vol.23 No.-
Selection of the adsorbent is the decisive factor in processes of molecular-sieve separation of Hydrocarbon mixtures in accordance with molecular structure, this is especially important for isolation of n-alkanes from middle and heavy petroleum fractions, as the diffusion coefficients of hydrocarbons decrease with increasing molecular weight, and the Zeolite loses its activity relatively rapidly owing to filling of its cavities with condensation products and cokes. Therefore, correct choice of adsorbents requires study of their static, kinetic, and dynamic characteristics.
崔英鮮 충주대학교 1993 한국교통대학교 논문집 Vol.27 No.-
The specific surface areas of sub-bituminous coking coal and their carbonization product have been evaluated from the adsorption isotherms of methanol, benzene and cyclohexane. The specific surface area increases with cabonization temperature and reaches maximum at about 600˚C. Cokes prepared at temperature above 800˚C possess much lower surface area due probably to sealing off of the microsystem. The coals and cokes exhibit molecular sieve effect, the specific surface area calculated from the adsorption data of methanol being much higher than area derived from the adsorption and cyclohexane, except for cokes prepared above 900˚C. Zinc chloride activation produces cokes of much greate specific surface area.
崔英鮮 충주대학교 1990 한국교통대학교 논문집 Vol.24 No.-
This critical evaluation of the B.E.T. and Cumulative Surface Area techniques for measuring specific surface areas. The Cumualtive Surface Area technique which calcualtes the surface areas for different carbon black which contatins no pores of less than 20A?? diamter, the agreement between the two techniques is good. With MPC which has some pores between 10A and 20A??, the nitrogen B.E.T. value is higher but if the isitherm is corrected for nitrogen condensed in small pores, the recalculated B.E.T. value agrees with the cumulative surface Area value, with sample having some pores less than 10A?? diameter, which is the case for most air-oxidized blacks, the agreement is poor. The nitrogen B.E.T. area is higher than the true value, and the Cumulative Surface Area is lower. This statement is supported by additional B.E.T.areas using neopentane, a large has molecule, as the absorbate.