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李守求 서울産業大學校 1986 논문집 Vol.23 No.1
This study was to investigate the water pollution for the industrial complex related to Pohang iron and steel foundry and to choose the right method for the prediction of wastewater flow rate and pollution load. To investigate the water pollution, the organic matters, nutriants and heavy metals were analyzed for the streams, seawater and sediments. Also, the effect of water reservoir in this area was evaluated for its treatment efficiency as the oxidation pond. To estimate the water pollution load, three methods which are based on the production, employees and plant area were used and compared with the field survey data. The method based on employees was evaluated as the best reasonable method and fitted well with the survey data.
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李壽久 고려대학교 의과대학 1975 고려대 의대 잡지 Vol.12 No.1
For the evaluation of the health of the shedding deciduous teeth in Korean, the author collected the shedding crowns which consisted of 2,157(male 1,162, female 995) in Seoul, 2,217 (male 1,170, female 1,047) in rural and observed d.f. teeth percentage and decayed degree in the crowns. The results obtained were as follows: 1. The d.f. teeth percentage in total examined teeth was 42.96 percent. a. There was no significant difference in d.f. teeth percentage between male and female. b. The d.f. teeth percentage was higher in rural than in Seoul. c. The d.f. teeth percentage on the anterior teeth was higher in maxilla than in mandible and higher in mandible than in maxilla on the molar teeth. d. The sequence of the caries frequency was following. 1st…… Upper 1st deciduous molar. 2nd…… Upper deciduous central incisor 3rd……Lower 2nd deciduous molar 4th……Lower 1st deciduous molar 5th……Upper 2nd deciduous molar 6th……Upper deciduous lateral incisor 7th……Upper deciduous canine 8th……Lower deciduous canine 9th……Lower deciduous central incisor 10th……Lower deciduous lateral incisor e. The filling teeth percentage in total examined teeth was only 0.23 percent and most of the filling teeth were observed in Seoul. 2. The decayed teeth classified by the Moller's method were 10.45 percent in degree 1, 10.06 percent in degree 2 and 22.22 percent in degree 3 in total examined teeth.
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