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카드뮴을 투여한 랏드의 혈액 및 간조직 내의 카드뮴 농도의 문포형에 관한 연구
문재혁,박정덕,정규철 중앙대학교 의과대학 의과학연구소 1987 中央醫大誌 Vol.12 No.4
A group of 74 male rats of Sprague-Daweley strain was divided into serveral subgroups to which 0.1∼0.3% cadmium chloride soultions were adminsistered intraperitoneally by single injection of equivalent amount of 1∼32 ㎎/㎏ of body weight. the rats were sacrificed by decapitation at various intervals beinning from 3 hours to 14 days after a single injection. The cadmium concentrations in blood(㎍/l) and liver(㎍/g of tissue wet weight) were measured with atomic absorption spectrophotometer(Baird, Model A5100) by double beam flameless method. Cadmium concentrations in blood and those in liver were both log-normally distributed with logarithmic function on Y=-4.9204×1n Cd+27.7179 for the former and Y=-9.1557 1n Cd+40.7212 fot the latter. the frequency distribution of blood cadmium concentrations was also fitted to expoential and power function curves. Arithmatic means and standard deviations of cadmium concentrations in blood and those in liver were 78.6± 65.25㎍/l and 22.0 ±20.46㎍/g of tissue wet weight with coefficient of variations of 83.0% and 93.0%, repectively. On the other hand, geometric means and standard deviations were 57.0±2.90㎍/l and 15.1 ±2.42㎍/g of tissue wet weight for blood and liver, respectively. Skewness and kurtosis of distribution curves calculated on the basis of asithmatic frequency were 3.27 and 15.24 for the blood cadmium and 1,98 and 7,06 for the liver cadmium, whereas these valurs turned out to be 0.28 and 2.25 for the blood and 0.21 and 2.19 for the livrt when the log-transformed values of frequency were empolyed for calculation. Cummulative relative frequency of log-transformed cadmoum concentrations in blood and liver plotted on the normal probability paper showed a good linearity. The above findings indicate that the cadmium concentrations in blood and hepatic tissue are well fitted to the normal distribution curves when logarithmic transformations were made on these values.
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문재혁(Jae-Hyeok Moon),이명훈(Myeong-Hun Lee) 한국콘텐츠학회 2016 한국콘텐츠학회논문지 Vol.16 No.11
주거복지 증진을 위해 필요한 택지공급을 위해서는 많은 토지를 취득해야 한다. 토지는 다양한 개발압력과 토지이용규제로 지가 결정에 대한 이견이 크며, 이러한 견해의 차는 공익사업 시행에 있어 갈등의 단초가 되고 있다. 지가 결정에 대한 객관적 연구를 통해 견해의 차이를 좁히는 것은 갈등 해결의 실마리를 제공하는 일이 될 것이다. 본 연구는 공익사업의 하나인 공공주택지구를 사례지역으로 선정하고, 보상단가를 종속변수로, 선행연구 및 전문가 집중인터뷰를 통해 선정된 변수를 독립변수로 하여, 헤도닉모형을 적용하여 지가에 영향을 주는 요인 및 그 정도를 분석하였다. 용도지역 및 이용상황을 기준으로 구분한 그룹별 분석결과 영향요인의 유의성 여부에서는 건물부지여부가, 영향력의 크기에서는 접근성측면과 공법상 제한측면이 그룹별로 상이한 결과가 도출되어, 합리적인 결과로 해석된다. 또한 선행연구에서 제시되지 않은 건물부지 여부를 변수로 추가 선정한 것과 도로접면 변수에 대한 비율척도 적용으로 보상액 영향 분석에 있어서 설명력이 높아졌다. In order to supply the residential land for the promotion of public welfare, it must take a land of city suburb. That land have the difference in thinking is large for the determination of land prices to a variety of development pressure and land use regulations. In the process of executing a public project, the difference of these ideas has become a cause of conflict. Therefore, through objective study for the determination of land prices, to reduce the difference of ideas is going to be a clue of conflict resolution. This study selected the case area that is typical public district of many conflict, and then fix a compensation unit price like fair price as dependent variable. The selected variables through previous studies and expert consultation was an independent variable. To analyze the impact factors of land prices in the hedonic price model. The results were analyzed by distinguishing the group on the basis of the zoning and using, whether or not the site of the building in part that there is influence variable, the aspects of accessibility and regulation in part degree of influence variable came out different results for each group. It is analyzed that it reasonable results. Add selected site assimilation of the building that have not been presented in previous studies as a variable and which was applied at a rate to a variable of road have improved in more expliction of the influence of variables.
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정규철,문재혁,홍연표 중앙대학교 의과대학 의과학연구소 1991 中央醫大誌 Vol.16 No.2
Forced expiratory flow rates of 427 boys and 414 girls aged between 8∼19 years old who were attending primary, middle and high schools were measured with Collins Survey Spirometer with Eagle One Microprocessor (Warren E. Collins, Inc., U.S.A.). Spirograms and simultaneous flow-volume curves were recorded on a kymograph and on a X-Y recorder (HP 7044b/7045b, U.S.A.) attached to the spirometer, respectively. Simple indices for the forced expiratory flow rates were derived. The calculation of indices required minimal information on mean age, mean height, and mean values of each forced expiratory flow rates(PEER, FEF_25%, FEF_50%, FEF_75%, and FEF_25-75%) to compare those groups which were different by many criteria such as smoking habbits, degree of air pollution, occupation, ethnic classification, disease state, symptomatological state, etc. The proposed indices are : For Male For Female 1. Index PEFR = PEFR·Age^-0.64/Height ^1.49 ; = PEFR·Age^-0.10/Height^2.11 2. Index FEF_25% = FEF_25%·Age^-0.63/Height^1.35 ; = FEF_25%·Age^-0.16/Height^1.95 3. Index FEF_50% = FEF_50%·Age^-0.42/Height^1.76 ; = FEF_50%·Age^-0.25/Height^1.76 4. Index FEF_75% = FEF_75%·Age^-0.35/Height^2.29 ; = FEF_75%·Age^-0.34/Height^1.84 5. Index FEF_25∼75% = FEF_25∼75%·Age^-0.42/Height^2.00 ; = FEF_25∼75%·Age^-0.32/Height^1.81 Percentages of FEF_25%, FEF_50%, FEF_75%, FEF_25∼75% and PEFR in each age group were 90∼95 %, 65∼70 %, 35 % and 55∼60 % for males and 95 %, 75 %, 40∼45 % and 65∼70 % for females, respectively, indicating 5∼10 % higher values in female for indices.
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