지방자치단체 중심의 아토피 예방관리 프로그램 효과 평가

서성철,조용민,류승훈,이승길,이지연,정지태,Seo, SungChul,Cho, YongMin,Ryu, SeungHun,Lee, Seung Kil,Lee, Ji Yeon,Choung, Ji Tae 한국환경보건학회 2013 한국환경보건학회지 Vol.39 No.4

Objectives: We evaluated the effects of an allergy control program on children with atopic dermatitis (AD) in five schools located within Gyeonggi-do. Methods: Based on the results of the 12-month prevalence of AD symptoms from an International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire of all students (n=2109; 1040 boys, 1069 girls) at five randomly selected schools, 227 students with AD symptoms were screened. Finally, 188 students with greater than 1 on SCORAD (SCORing Atopic Dermatitis) determined by a physician were selected. The allergy control program includes education related to allergic diseases, skin prick tests, and SCORAD evaluation, as well as keeping a daily journal to check the usage of moisturizer at least once a day. To determine the effectiveness of the allergy control program, SCORAD evaluation was performed again six weeks later. Results: The most common symptom for 12-month prevalence was rhinorrhea (33.9%), followed by atopic skin lesions (14.8%) and wheezing (4.0%). The 12-month prevalences of the three allergic diseases were higher for boys than for girls, and a significant difference was found for allergic rhinitis (P<0.001). The mean SCORAD index decreased significantly from 26.1 to 17.5 after the completion of the six-week control program (P<0.01). In particular, these differences were more pronounced for the group which used the daily journal (P<0.001). Conclusions: Our findings indicate that the allergy control program including usage of a daily journal as well as regular monitoring could be a promising tool for preventing and alleviating the symptoms of allergic diseases.

공공공사 설계변경 주요인자 도출을 위한 유클리드 거리 측정 기법 활용 연구

서성철(Seo, Sungchul),오다현(Oh, Dahyun),박형근(Park, Huyng-keun) 대한토목학회 2022 대한토목학회 학술대회 Vol.2022 No.10

지질 및 다양한 변수 기반의 라돈 잠재지도 작성

서성철(Sungchul Seo) 대한지질학회 2022 대한지질학회 학술대회 Vol.2022 No.10

곰팡이 노출에 따른 건강영향 및 민감 시설 내 곰팡이 분포 현황

서성철(SungChul Seo) 한국환경보건학회 2020 한국환경보건학회지 Vol.46 No.4

Objectives: Exposure to mold is strongly associated with adverse health effects (development or exacerbation of allergic diseases). We reviewed the health effects of mold exposure and explored to determine the annual distribution of indoor mold in facilities with susceptible populations. Methods: The health effects of mold exposure were mainly summarized by reviewing related papers and WHO research reports. We selected 10 facilities, including daycare centers, postpartum care centers, medical institutions, and elderly care facilities within the Seoul Metropolitan. Mold sampling was performed once every week or once every quarter from February 2016 to 2017. In addition, fungal species analyses was performed, and distribution status by month and facility was analyzed in the same manner as concentration. Results: Adverse health effects attributed to fungal exposure are largely divided into allergic symptoms, toxic effects, and infectious effects. Monthly mean concentrations of mold indoors and outdoors was 368.8 CFU/m3 (geometric mean 213.4 CFU/m3 ) and 496.0 CFU/m3 (327.9 CFU/m3 ), respectively. The indoor concentration has begun to increase in February, peaked in July, declined in August, increased again until October, and then decreased in November. About 36 genera of indoor fungal species were found in each facility. Cladosporium sp., Penicillium sp., Fusarium sp., Aspergillus sp., Alternaria sp., and Arthrinium sp. were observed as the dominant species. Conclusions: Our findings showed that the overall level of indoor mold was below the 500 CFU/m3 level recommended by the Ministry of Environment. The development of DNA-based assessment and expanding facilities to be monitored for mold would be necessary for preventive aspects.

레이저프린터에서 배출되는 공기 중 오염물질 조사

서성철(SungChul Seo),조용민(YongMin Cho),김미나(Mina Kim),이승길(Seungil Lee),김해준(HaeJoon Kim),이동현(Donghyun Lee),최재욱(Jae-Wook Choi) 한국실내환경학회 2011 한국실내환경학회지 Vol.8 No.4

The aim of this study was to compare the concentrations of airborne pollutants (i.e., PMs, TVOC, and ozone) released from a laser printer with a new and/or a refilled toner cartridge. Also we compared the concentrations before and after attaching a HEPA filter at the outlet of exhausted air for each printer. PMs, TVOC, and ozone were released from all three different branded printers with both toner cartridges in accordance with their both a brand new and a used condition. For PMs, there were generally significant differences of concentrations between a brand new and used toner (p<0.05). Ozone level differences were found between a new and a refilled toner, but were not significant (p>0.05). For TVOC, there were significant differences of concentrations among brands, and toluene (3.46 ㎎/㎥) only was identified. The overall 70% of reduction for PMs' concentrations occurred after attaching a HEPA filter(p<0.05), and these results were pronounced for TSP. These results showed that similar levels of airborne pollutants were released from a laser printer with a new and a refilled toner cartridge. Also, these results indicate that the usage of a HEPA filter may be an effective method for reducing the released pollutants from a laser printer.

chl-a농도가 1일 pH와 DO 농도 변화에 미치는 영향분석

전지홍 ( Ji-hong Jeon ),서성철 ( Seo Sungchul ),최필성 ( Pilsung Choi ),임경재 ( Kyoung-jae Lim ),김이형 ( Lee-hyung Kim ) 한국물환경학회(구 한국수질보전학회) 2016 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2016 No.-

가정 내 부유 진균의 농도와 관련 요인

조용민,류승훈,최민석,서성철,정지태,최재욱,Cho, YongMin,Ryu, SeungHun,Choi, Min Seok,Seo, SungChul,Choung, Ji Tae,Choi, Jae Wook 한국환경보건학회 2013 한국환경보건학회지 Vol.39 No.5

Objectives: This study was performed in order to determine airborne fungi levels in homes and find related factors that may affect airborne fungi concentration. Methods: Fifty homes were study subjects for measuring airborne fungi. For sampling airborne fungi, the impaction method on agar plates was used and samples were counted as colony forming units per cubic meter of air ($CFU/m^3$). In addition, information regarding housing characteristics and atopic disease in each home were collected via questionnaire. Results: The geometric means (GM) of airborne fungi concentrations in fifty living rooms and bedrooms were 68.03 and 62.93 $CFU/m^3$, respectively. The GM of airborne fungi concentration in atopy homes was 78.42 $CFU/m^3$. This was higher than non-atopy homes' 54.34 $CFU/m^3$ (p-value=0.051). In the results of the multiple regression analysis, outdoor airborne fungal concentration proved a strong effective factor on indoor airborne fungal concentration. Also, construction year, floor area of house, indoor smoking and frequency of ventilation were factors that showed a significant association with indoor airborne fungi concentration. Conclusions: The results of this study show that some housing and living characteristics may affect the development and increase of airborne fungi. In addition, exposure to airborne fungi may be a risk factor for the prevalence of childhood atopic diseases.

지하철 내 공간모델일을 통한 라돈 농도 변화 예측 연구

김도형(Dohyeong Kim),서성철(Sungchul Seo) 대한지질학회 2022 대한지질학회 학술대회 Vol.2022 No.10

지방하천 홍수피해 저감 방안

맹승진 ( Seungjin Maeng ),김다예 ( Daye Kim ),박지원 ( Jiwon Park ),서건 ( Geon Seo ),서성철 ( Sungchul Seo ) 한국농공학회 2023 한국농공학회 학술대회초록집 Vol.2023 No.0

우리나라 초기의 하천정비 및 관리는 근대화라는 가치 아래 경제개발과 매년 반복적으로 겪는 홍수와 가뭄피해, 그리고 자연재해로 인한 식량 자급의 문제를 근본적으로 해결하기 위한 정부 정책으로 추진되기 시작하였으며 생 · 공 · 농업용수 전용 댐을 비롯하여 대규모 다목적 댐 개발에 의한 수자원의 개발에 집중하였다. 하천의 이수 및 치수 기능은 확보하였지만 상대적으로 취약했던 하천 생태계 보전, 보호와 친수 기능 등 하천환경 기능 강화와 삶의 질적인 향상을 추구하면서 물 문화에 대한 재인식 측면에서 하천환경 변화에 대한 관리의 필요성이 점점 확대되고 있다. 최근에는 국지성 집중호우로 대규모 홍수피해가 발생하고, 각종 개발사업의 증가로 인해 도시의 내배수시스템에 과부하가 발생하여 강우시 하수 역류, 유수지 침수, 그리고 펌프의 과다배수로 인해 하류부 수위가 증가하는 현상이 빈번하게 발생하고 있다. 지방하천의 과거 홍수피해 사례를 조사하고, 홍수피해의 주된 원인이 무엇인지 문헌 등을 통해 제시한 결과 구조적, 비구조적 대책을 제시하였다. 구조적 대책으로는 댐·홍수조절지 건설, 하천 및 제방정비, 천변저류지 설계에 대한 방안을 제시하였으며, 비구조적 개선 방안으로는 홍수터 관리, 풍수해(홍수) 보험, 유역관리, 실시간 홍수예경보시스템 구축을 제시하였다. 하천의 이용 및 운영 개선 방안으로 하천구역 내 토지관리를 조성목적 또는 계획상에 포함된 확정된 장래의 용도를 분명히 해야 할 필요가 있다고 제안하였다. 지방하천 정비로서는 치수 및 하천 환경 보전을 위한 자연형 하천공법을 채택하는 것을 제안하였다. 또한 지방하천(중소하천)을 도시하천, 농어촌지역, 유원지 지역 등으로 구분하여 각각의 이용목적과 특성에 맞게 정비 방향을 설정하였다. 하천관리 조직의 정비는 하천 관리 조정기구의 상설화와 수계별 하천관리 조직을 정비하여 지역 현장 전문가와 실무자로 구성된 통합물관리위원회를 신설하고 활성화하여 지방하천의 관리기능 업무를 수행토록 제안하였다.

어린이활동공간에서의 바이오에어로졸 포집 전략

조정흠 ( Jungheum Jo ),박준식 ( Jun-sik Park ),김성연 ( Sung-yeon Kim ),권명희 ( Myung Hee Kwon ),김기연 ( Ki Youn Kim ),최정학 ( Jeong-hak Choi ),서성철 ( Sungchul Seo ) 한국산업보건학회 (구 한국산업위생학회) 2016 한국산업보건학회지 Vol.26 No.3

Objectives: We aimed to compare the sampling performance of different flow-based impactor samplers for collecting fungal spores and bacteria and to explore the association of the level of bioaerosols with activity patterns of occupants in daycare center settings. Methods: For comparison of sampling performance, two different flow-based samplers (greater than 100 L/min or not) were selected; a low flow-based sampler (one-stage Andersen sampler) and two high flow-based samplers (DUO SAS SUPER 360 sampler, BUCK bio-culture sampler). We collected airborne mold and bacteria in 30 daycare centers with various levels of contaminated air. Three repeat samplings per each sampler were performed. Mold and bacteria were grown for 96 hours at 25±1℃ and 48 hours at 35±1℃, respectively. The Andersen and SAS samplers were used for investigating the association between the level of bioaerosols and the activity patterns of occupants in daycares. Particular matters 10(PM10), temperature, and relative humidity were monitored as well. Samplings were carried out with one-hour interval from 9 to 5 O’clock. For statistical comparisons, Kruskal-Wallis test, Wilcoxon’s signed rank test, and multiple regression analysis were carried out. Results: The airborne level of molds by the low flow-based sampler were significantly higher than that of high flow-based samplers (indoor, P=0.037; outdoor, P=0.041). However, no statistical difference was observed in the airborne level of bacteria by each sampler. Also the level of bioaerosols varied by the time, particularly with different activity patterns in daycare centers. The higher level of mold and bacteria were observed in play time in indoor. Similarly, the concentrations of PM10 were significantly associated with the level of bioaerosols (P<0.05). Conclusions: Our findings indicate that the flow rate of sampler, rather than total air volume, could be able to affect the results of sampling. Also, the level of airborne mold and bacteria vary behavior patterns of occupants in indoor of daycare settings. Therefore, different samplers with other flow rate may be selected for mold or bacteria sampling, and activity patterns should be considered for bioaerosol sampling as well.