아산시 호소들의 오염실태조사 및 그 대책

장봉기,이종화,박종범,민준호,박종안 순천향대학교 기초과학연구소 1997 순천향자연과학연구 논문집 Vol.3 No.2

The object of this study is to survey water quality of reservoirsin in Asan city. We also suggest some countmeasures for environmental preservation toward sustainable urban development of Asan city. We analyze water qualities (pH, DO, COD, SS, T-P, T-N and Chlorophyll-a) of reservoirs. The level of water quality of small reservoirs is in the range of level Ⅳ-Ⅴ higher than the level Ⅲ established by the Ministry of Environment. Especially, water quality of Sinchang, Youngin and Shinchung reservoirs is worser than that of other reservoirs. Water quality of Asan and Sapkyo lake is the range of level Ⅳ-Ⅴ. As the levels of T-P and T-N are level Ⅳ and level Ⅴ, respectively, eutrophication might be progressed. Reservoirs in Asan city were already serious polluted by inflow of wastewater from residents, animal husbandries and industries. Recently, Metropolitan Area Development Planning(MADP) for Asan bay-area was suggested by the Ministry of Construction. According to this plan, industrialization and urbanization of Asan area will rapidly progress. If sewage and wastewater treatment facilitiesare not provided, water quality of reservoirs in Asan city will be worse. In order to prevent of environment pollution, first, the impact of industrialization and urbanization of Asan area on the environment should be considered at the beginning of MADP. Second, total effluent regulation of water pollution, air pollution and soil wastes, based on the self-purification of the Asan city environment, should be enforced.

국립공원 아고산대 독립훼손지 복원식생 분포특성 및 관리방안

김종엽(Jong-Yup Kim),윤주웅(Ju-Ung Yun),한봉호(Bong-Ho Han),곽정인(Jeong-In Kwak),박석철(Seok-Cheol Park),박수영(Su Young Park),정원옥(Won-Ok Jeong) 국립공원연구원 2022 국립공원연구지 Vol.13 No.1

본 연구는 독립훼손지 중 아고산대에 위치한 지리산국립공원 세석평전과 노고단 복원식생지를 대상으로 현존식생 분석 및 식생분포 특성을 파악하여 중장기적인 모니터링 및 관리방안 수립을 위한 기초자료를 제공하고자 수행하였다. 현존식생 조사범위는 훼손지 일대 유역권분포 현황을 고려하여 설정하였으며, 세석평전 조사면적은 55,037㎡, 노고단 조사면적은 166,599㎡ 이었다. 세석평전은 초본층에 의한 식생피복도는 90% 이상 수준으로서 나지노출이 없었고, 관목층의 피복도가 60% 이상으로 안정화되어 있었다. 주요 출현수종은 구상나무, 사스래나무, 쇠물푸레나무, 철쭉, 털진달래, 붉은병꽃나무 등 식재수종과 자연적으로 이입한 자생수종이 생육하고 있었다. 노고단은 신갈나무, 호랑버들, 철쭉, 털진달래, 미역줄나무 등이 우점하는 관목식생지가 52%로 가장 넓게 분포하고 있었고, 전반적으로 식생활착 상태가 양호하였다. 노고단의 원식생은 신갈나무군락으로 추정되었고, 군부대철거지에는 귀화식물이 분포하고 있기 때문에 적극적인 관리가 필요하였다. 연구대상지는 장기적으로 주변 자연식생과 조화로운 식생경관으로 발달할 것으로 예측되었다. 향후 훼손지 복원모델은 인근 지역의 원식생을 고려하여 설정해야 할 것이지만, 복원 달성 목표는 실현가능한 수준의 목표를 설정해야 할 것이다. This study was conducted to provide basic data for mid-to long-term monitoring and establishment of management plans by analyzing the existing vegetation and identifying the vegetation distribution characteristics for the restored vegetation in Nogodan and Seseokpyeongjeon in Jirisan National Park located in the subalpine zone among the independent damaged areas. Actual vegetation survey range was established in consideration of the distribution of the watershed around the damaged area. The surveyed area of Seseokpyeongjeon was 55,037㎡, and the surveyed area of Nogodan was 166,599㎡. In Seseokpyeongjeon, the vegetation coverage by the herbaceous layer was almost 90% or more, there was no bare exposure, and the coverage of the shrub layer was stabilized at 60% or more. The main emerging tree species were planted species such as Abies koreana, Betula ermanii, Fraxinus sieboldiana, Rhododendron schlippenbachii, Rhododendron mucronulatum var. ciliatum, and Weigela florida as well as natively migrated native species. In Nogodan, the shrub vegetation dominated by Quercus mongolica, Salix caprea, Rhododendron schlippenbachii, Rhododendron mucronulatum var. ciliatum, and Tripterygium regelii was the most widely distributed with 52% of the area, and the overall diet was good. The native vegetation of Nogodan was presumed to be a cypress colony. Naturalized plants were distributed in the military base demolition site, so active management was required. The study site was predicted to develop into a vegetation landscape in harmony with the surrounding natural vegetation in the long term. In the future, the restoration model for damaged areas should be set in consideration of the native vegetation of the nearby area, but the goal to achieve restoration should be set at a feasible level.

카드뮴의 중추신경계 독성유발 기전

이종화,장봉기,박종안,박종영,김완종,우기민 한국환경독성학회 2004 환경독성보건학회지 Vol.19 No.3

Although numerous studies have shown that cadmium disturbs the normal biological processes in central nervous system the mechanism of toxicity is not well understood The present study has investigated the effect of cadmium on oxidative stress, Na+/K- ATPase activity and the aggregation of amyloid beta peptide(β-amylotd) in neuronal cell Ime, HT22 cell LC_(5) and LC_(50) of cadmium for HT22 cell resulted from MTT assay was 4 1 μM and 9 5 μM, respectively Cadmium(2 to 8 μM) dose-dependently increased the lipid peroxidation and decreased the content of glutathione Cadmium 4 μM showed a significant decrease in Na^(-)/K^(+) ATPase activity as compared with control group The aggregation of P-amyloid was accelerated in a dose-dependent manner by the treatment with 2 to 8 μM cadmium These results suggest that the neurotoxicity of cadmium can be mediated by the increase in oxidative stress and decrease in Na^(-)/K^(+) ATPase activity.

한국 정신장애의 역학 조사 연구[I] : 각 정신장애의 유병률

조맹제,함봉진,김장규,박강규,정은기,서동우,김선욱,조성진,이준영,홍진표,최용성,박종익,이동우,이기철,배재남,신정호,정인원,박종한,배안,이충경 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.4

Objectives : This study aims to estimate the prevalence of the DSM-IV psychiatric disorders in Korean population using the Korean version of Composite International Diagnostic Interview (K-CIDI). Methods : Subjects were selected by taking multi-stage, cluster samples of 7,867 adult household residents, 18 to 64 years of age, in ten catchment areas. Total 78 trained interviewers administered the K-CIDI to the selected respondents, from June 1 to November30,2001. Results : Total 6,275 respondents completed the interview. Some 33.5% of respondents reported at least one lifetime disorder, 20.6% reported at least one-year disorder, and 16.7% reported at least one-month disorder. The most common lifetime disorders were alcohol abuse/dependence (17.24%), nicotine dependence/withdrawal (11.19%), specific phobia (5.16%), and major de-pressive disorder (4.25%). The lifetime prevalence of substance abuse/dependence (0.25%) and schizophrenia (0.16%) was very low. Nicotine and alcohol use disorder showed very high male/female ratio. Mood disorder and anxiety disorder were more prevalent among female than male. Conclusion : The prevalence of psychiatric disorders was high. In comparison with other studies, remarkable differences in distributions of psychiatric disorders across the areas and times were observed.

老齡者의 建康을 위한 生活習慣 實態調査

申東敏,長鳳愚,李揆文,金賢俊,金昌範,崔宗洙,崔鍾晥,李鍾珏,金圭碩,趙庚旭,金鍾聲,朴鍾振 平生體育硏究所 論文集 1987 平生體育硏究所 論文集 Vol.2 No.-

With a view to examining the habit and method in which old people maintain and improve their health, we consulted 551 men and 444 women who were over 65 years old, and concluded as follows: 1. Habit of eating It's been revealed that most of the old people keep a regular eating hour, control the quantity of meal or eat a little food, and prefer vegetables to meat. 2. Mental health Old people feel the necessity for mental health and most of them (about 80%) keep good mental health without becoming pessimistic. Their chief concenrs have turned out to be about their sons and daughters and their own health and finance. 3. Managing Good Health It has been revelaed that old people do not possess any special kind of secret to keep good health but taking plenty of rest, regular meal, and proper exercise, and many of them (about 60%) have been shown to eat invigorant food that they can easily get around their living area. 4. Physical Functions It has been revealed that many old people are conscious of some symptoms about their parts of body and about to percent of them suffers from neuralgia. Some measures like medical aid especially for old people need to be taken as soon as possible. As we have found that the health-keeping method of old people consists plenty of rest, proper exercise, and appropriate nutrition, we can conclude that the recreatonal and culture facilities and programs for keeping old people in good health should be developed. It is also necessary to study food that contribute to their health and develop ways to get rid of the stresses to which they are exposed in their daily life. Presides, it is natural that government found an administrative department to deal with these matters effectively.

아산시 폐기물 처리현황

박종안,한성현,손부순,이종화,장봉기 순천향대학교 기초과학연구소 2001 순천향자연과학연구 논문집 Vol.7 No.1

This study was performed to investigates problem understanding correctly about all sorts present condition connected with current Asan city municipal solid wastes, and it wished to present way that can cope actively about predicted waste problem because establishing reasonable plan of wastes administration. The summarize result that examine from June, 1999 to May, 2000, is as following. 1.Until end of 1998 Asan city's number of total population being 180,224 people, is being low, but recently look sudden increase trend than our country average population increase rate 1.1% of 1994 years by yearly mean population increase rate 0.954% of past 21 years. Population size per generation was 5.4 people in 1978 but dropped to 3.0 people in 1998 because becoming low gradually. 2.Is high by 1998 years house self-support rate(93.95%) of Asan city, house form singleness house about 50% occupy, and the next time was 40.1% into apartment. 3.The average purity life wastes amount per 1 day including recycling is 164 tonnage in 1999, and more daytime expressed the occurrence amount than 0.963kg that life wastes amount of materials that 1 person comes forward in succession 1 day is national average of 1998 by 0.902kg in 1999. 4.The amount of Asan city's life wastes were higher than 59.3% that combustibility is national average by 64.8% in 1999, and was lower ratio than national average 28.7% by 26.5%. 5.The compositional weight fraction of food garbage, 42.3%, papers, 20%, in Asan city's wastes. 6.Occurrence amount of incombustibility ingredient appeared by thing which home which use briquet in heating yet because used briquet among them is higher than national average 17.2% by 27.2% being 14.7 ton/day is higher than national average. 7.Occurrence amount of recycling ingredient of Asan city life waste expressed the highest ratio by scrap iron kind 54.4% among two being 45.8 ton, and next many things occupied about 22% by paper kind. 8.The amount of landfill wastes except recycling in Asan city is 76.4 ton/day. 9.The purity landfill wastes amount that use volume-rate garbage disposal system envelope sale present condition (data 1997) is come to 66.6% of 76.4 ton that is normal that is carried to landfill 1 day and remainder 25.5 ton (33.4%) can presume that it occupies that unuse large size waste and partial volume-rate garbage disposal system envelope because whole Asan city gets into 50.9 ton/day by 0.280kg/day/person.

카드뮴이 마우스 뇌에서 아연의 항상성에 관여하는 유전자발현에 미치는 영향

박종안,여은영,남상훈,장봉기,이종화,김완종 한국환경독성학회 2004 환경독성보건학회지 Vol.19 No.4

Metallothionein (MT), a small protein molecule which can bind of release metal tons, is involved in the regulation of cellular metal homeostasis This study was investigated the accumulation of cadmium in blood, tissue (liver, kidney and brain), and the effect of cadmium on several key genes (MT-Ⅰ, MT-Ⅱ, ZnT-1) in zinc metabolism m the mouse Mouses weighing 20-25g were randomly assigned to control and cadmium treated group (Cd group) Cd group was intraperitoneally injected with cadmium 2, 4, 8 mg/kg and control group was administerd with saline Mouses of each group were sacrificed by decapitation 4 hours after the administration of cadmium Cadmium contents in blood, fiver, kidney and brain were increased by a dose-dependent manner Accumulation of cadmium was mainly occurred in liver and kidney Induction of MT-I and MT-11 protein was increased, but ZnT-1 expression was decreased to a dose-dependent manner by the treatment of 2~8mg/kg cadmium These results suggested that cadmium can be transported to brain and alter the expression of several key genes in zinc homeostasis.

PWM을 利用한 空壓Cylinder의 位置制御에 關한 硏究

朴鍾奉,盧尙鉉 慶一大學校 1990 論文集 Vol.6 No.1

A pneumatic position control system must have the velocity and acceleration feedback devices to improve the performance of the system, but theses devices cause not only to complicate the structure of a system but also to raise the cost of one. In this paper, the pneumatic position control system consisting of a microcomputer, a solenoid valve, a sing-rod cylinder, a PWM circuit, and an encoder which used as a position sensor is developed. The step input response of the developed system is measured experimentally.

일부 생산직 근로자의 소음과 사회심리적 요인이 혈압에 미치는 영향

박종구,강명근,차봉석,고상열,장세진,고상백 大韓産業醫學會 1997 대한직업환경의학회지 Vol.9 No.2

This study was conducted to assess the effects of noise exposure and psychosocial factor on blood pressure in manufacturing workers. The study subjects are 414 workers(243 males, 171 females) employed at the noisy department. The mean age of low exposed group(<85dB) was 34.65±9.53 years, and that of high exposed group(≥85dB) was 36.37±11.15 years. The difference in mean age was not significant. The mean and distribution of working duration, smoking status, drinking status were not significantly different between two groups. The mean systolic blood pressure of the low exposed group was 120.01±12.06 mmHg, and that of high exposed group was 126.27±13.84mmHg. The mean diastolic blood pressure of the low exposed and the high exposed group were 77.18±10.83 mmHg, and 83.46±11.22mmHg respectively. These differences of blood pressure were statistically significant(p<0.05). The workers in noisy department have significantly less work environmental satisfaction, higher job demand, and higher social support. The mean values of psychosocial distress were higher in the workers of the noisy department, but the difference was not statistically significant. This study was to speculate whether the work environmental satisfaction and social support modify the association between the noise exposure level and the blood pressure. The result showed that work environmental satisfaction could not modify the association between the blood pressure and the noise exposure. Social support at work did not modify the association. Furthermore, we evaluated the high job strain from a combination of ratio of the high job strain group for hypertension in diastolic blood pressure were statistically significant, but not in systolic blood pressure. Hierarchical multiple regression analysis was used to determine whither the independent variables contributed to explaining the blood pressure. After controlling for possible confounders, we found that the noise exposure level was a correlated of the diastolic blood pressure. But no association between the noise exposure level and the systolic blood pressure. No significant result was found for psychosocial factor.

아산시 신정호소의 수질오염 현황 및 부영양화 저감 방안

박종안,이종화,장봉기 순천향대학교 기초과학연구소 1998 순천향자연과학연구 논문집 Vol.4 No.1

This study was conducted to estimate the amount of water pollution load, water quantity and quality of inflow stream, status of water pollution and reduction of eutrophication in the Sinjung lake in Asan city. Inflow of branch to Sinjung lake have two streams, one is Cho-sa stream which are Ki-san bridge and Cho-sa bridge and the other is Hwang-san stream. Number of sampling points for water quality are 23 in the Sinjung lake and it's sediment of bottom from March to July, 1997. Water quality had been tested pH, dissolved oxygen(DO), chemical oxygen demand(COD), suspended solid(SS), total nitrogen(T-N), total phosphorus(T-P), E.coli group, and spring out test for sediment are total nitrogen, total phosphorus and heavy metals(Fe, Pb, Cd). The results were as follows; Amounts of pollution load were highest at Cho-sa stream. The ratio of livestock wastewater was occupied with the above 90% of total water pollution load. Mean daily inflow of Cho-sa stream and Hwang-san stream were 34,092㎥ and 25,524㎥, respectively. In mean level of inflow water quality, COD, SS, T-N, T-P and E. coli group were 16.96㎎/ℓ, 50.3㎎/ℓ, 5.85㎎/ℓ, 0.51㎎/ℓ and 4,096/100㎖, respectively. Water quality of inflow was worst at the point of Ki-san bridge in Cho-sa stream. Mean level of DO, COD, SS, T-N, T-P and E. coli group were 6.43㎎/ℓ, 17.11㎎/ℓ, 194.0㎎/ℓ, 5.96㎎/ℓ, 0.56㎎/ℓ and 2,191/100㎖, respectively at Sinjung lake. These are higher than class V by environmental water quality standards for lake. Spring out level of T-N, T-P, Fe and Pb in sediment of Sinjung lake were 326.6ppm, 17.9ppm, 624.2ppm and 2.65ppm, respectively.