The Status and Prospect of Health Risk Assessment for the Environmental Pollutants

DongChun Shin 환경독성보건학회 2004 한국독성학회 심포지움 및 학술발표회 Vol.- No.-

Smoking Cessation : A Rational Approach

Shin, Dongchun,Won, Jongwook,Kim, Daehyun Medical Publications Korea 1997 Medical Progress Vol.19 No.2

음용수 중 소독부산물 발생현황에 관한 연구

신동천,정용,최윤호,김준성,박연신,금희정,전희경 한국환경독성학회 2001 환경독성보건학회지 Vol.16 No.1

The main purpose of applying the chlorination process during water treatment is for disinfection. Research results, however, indicate that disinfection by-products including trihalomethanes, haloacetic acids, haloacetonitriles, haloketones, and chloropicrin can be produced by chlorination process. Some of these disinfection by-products are known to be potential human carcinogens. This three-year project is designed to establish a standard analysis procedure for disinfection by-products in drinking water and investigate the distribution and sources of specific disinfection by-products. The occurrence level of DBPs in drinking water was below 50㎍/L in most cases. THMs in plant effluent accounted for 48% of all DBPs measured, whereas HAAs accounted for 24%, HANs 14%, haloketones 5%, chloral hydrate 7%, and chloropicrin 2%. Chloroform was found to be the major THMs compound (71%), followed by bromodichloromethane (21%), dibromochloromethane(7%), and bromoform (3%). The concentration of DBPs formed in distribution systems increased from those detected in plant effluent. Results would play an important role in exposure assessment as a part of the risk assessment process, and would give basic information for establishment of disinfection byproducts reduction and management procedures.

공단지역 주민에서 휘발성 유기오염물질의 호흡기 노출에 대한 생체지표 평가

신동천,박성은,임영욱,양지연,김명수 한국환경독성학회 2000 환경독성보건학회지 Vol.15 No.3

Residents who live near petrochemical industrial areas are exposed to a variety of petrochemicals, including benzene or benzene-containing liquids. It is a serious concern because some VOCs are carcinogens naturally present in petroleum and gasoline. The aim of this study was to assess the exposure to VOCs, measured by personal/indoor/outdoor air sampling, and to estimate the relationship between the air samples and biological monitoring data. Through biological monitoring, we investigated VOCs in blood and s-phenylmercapturic acid (s-PMA), minor urinary metabolites of benzene. The external benzene exposure of subjects was measured using passive dosimeters and urinary s-PMA and blood-benzene were determined by GC/MS. More than 80% of subjects were detected for m-xylene, ethylbenzene, and toluene in blood samples and not detected at all for chloroform, 1, 1, 1-trichloroethylene, and tetrachloroethane. The mean concentration of benzene in the breathing zone of residents was 6.3 ㎍/m³, personal, indoor and outdoor concentrations were strongly correlated to each other. s-PMA detected in all subject samples was affected by personal exposure (p<0.05) and the level was different by age (p<0.01). Blood benzene was not affected by external benzene during these periods.

수질오염과 건강

신동천,Shin Dongchun 한국산업간호협회 2001 한국산업간호협회지 Vol.8 No.2

Association between body composition parameters and non-specific low back pain in sedentary workers

Wondeuk Kim,Dongchun Park,Doochul Shin 물리치료재활과학회 2021 Physical therapy rehabilitation science Vol.10 No.1

Objective: In clinical practice, there are a lot of exercise to reduce body weight or reduce the amount of body fat in order to solve back pain. However, many studies have contradicted the relationship between back pain and weight or body fat mass. The purpose of this study was to investigate the relationship between fat mass, body mass index and low back pain of office worker. Design: Crossed-sectional study Methods: Among the white-collar workers diagnosed with non-specific back pain by doctors, subjects who were not included in the exclusion criteria were selected to measure the subject s body fat mass, body mass index, pain intensity, and disability index due to back pain. The NPRS was used for the intensity of back pain of office workers, and the ODI was used for the degree of disability due to back pain. A body composition analyzer was used to measure the body fat mass and body mass index of white-collar workers. Results: There was no significant difference between the two groups in the comparison between the normal group and the excessive group according to the criteria of fat mass and body mass index. In the correlation analysis of fat mass, body mass index, pain intensity, and disability index, it was found that there was a significant correlation between fat mass and body mass index. However, neither fat mass nor body mass index had a significant correlation with pain intensity and disability index. Conclusions: The fat mass and body mass index of office worker do not affect low back pain.

Next Generation Mobile Business Model Creation based on Scenario-based Analysis

Seungwan Ryu,Dongchun Shin,Jinbae Kim,Donsung Oh 대한산업공학회 2006 대한산업공학회 추계학술대회논문집 Vol.2006 No.11

환경문제의 위해도 인식과 위해도 홍보 프로그램의 효과분석 : 라돈과 다이옥신을 중심으로

김진용,신동천,박성은,임영욱,황만식 한국환경독성학회 2002 환경독성보건학회지 Vol.17 No.4

Risk communication can he defined as the exchange of information about the nature, magnitude, significance, acceptability, and management of risk. The effect of risk communication on the perception and knowledge towards risk of environmental pollutants and it's related factors were investigated in this study. To investigate perception and knowledge of students and teachers towards risk of environmental pollutants, we conducted the survey using self-administrated questionnaire, The subjects were 574 for the first survey and 465 for the seconds survey from May to June, 2000. The main methods of transmission used in this study-through video tape, visual materials, question and answer, and participation in measuring pollutants-were not a one-way street. But an interactive process where information and opinions were exchanged among individuals, groups, and institutions. Environmental pollutants measured with participation of study subjects was Radon in the class room. The concentration of Radon was measured using E-PERM Device by installing it at each site for about 5 days. Subjects showed much interest in environmental pollution. Also, more than 98% of total subjects were perceived as Korea is seriously contaminated at present. By risk communication activity, risk perception of all subjects about Radon was increased, on the other hand, risk perception of Dioxin was decreased except for elementary student. Moreover, knowledge of all subjects about environmental risk was significantly increased(p= 0.0001) and effort of reducing environmental pollution was more increased (p<0.05). There is need to further develop, refine, and integrate these approaches environmental risk communication study, there is an even more pressing need to accelerate the diffusion of environmental risk communication practice into government and organizations.

스마트폰과 미세유체흐름칩 기반 발효 모니터링 센서

신원진 ( Wonjin Shin ),이동춘 ( Dongchun Lee ),박두산 ( Tusan Park ) 한국농업기계학회 2020 한국농업기계학회 학술발표논문집 Vol.25 No.1

발효식품은 간 기능 보호작용, 면역기능 강화, 항산화활성, 항암작용 등의 효과들로 수요가 증가하고 있음. 이러한 발효식품의 장점 때문에 이에 대한 관심도는 인간의 식품에서뿐만 아니라 축산업에서도 높음. 식품에서 젖산 발효를 진행할 수 있는 미생물에는 L. acidophilus, L. casei와 Bifid bacterium species등이 있음. 위의 언급된 미생물들은 대사과정의 결과물로서 젖산을 생산하게 됨. 발효가 진행되면서 L-lactate의 농도와 pH 값이 변화하게 됨. 그러나 발효의 조건을 잘 조절하여 진행한다고 하더라도 제품의 초기 조건들의 편차로 인해 항상 같은 수준의 발효 정도를 획득하기를 신뢰할 수 없음. 특히, 발효 중 불필요한 균의 유입 및 공기의 접촉을 통해 부패로 이어질 위험성이 높아짐. 그러므로 발효과정 중 젖산, pH의 변화량 추이를 모니터링하여 발효 제품의 품질 및 부패 여부를 사전에 예측하는 것이 중요함. 본 연구에서의 목적은 L-LDH 기반 젖산 센서 및 chemical dye를 이용하여 현장에서 즉각적으로 발효제품의 발효과정의 모니터링 및 젖산 정량 분석이 가능한 smartphone based on-chip platform 제작임. Methyl red는 대표적인 pH indicator 중 하나로 pH 분석에 있어 매우 강력한 장점이 있음. 빠른 반응속도와 선명한 색 변화는 분석 시간을 단축하는 동시에 정확도를 높여줌. 젖산을 정량분석하기 위해 L-lactate dehydrogenase(L-LDH)를 이용한 효소-기반 바이오센서를 사용하였음. L-LDH 효소는 L-lactate와 NAD+를 각각 L-pyruvate와 NADH+로 환원시킴. 이때, 발생한 NADH는 340 nm의 자외선 파장에서 여기되어 약 460 nm에서 형광을 발생시키는데 이것의 형광 세기를 분석하여 lactate의 농도를 정량 분석함. 3D 프린터를 이용하여 smartphone based on-chip platform을 제작하였음. 스마트폰 기반 광학 모듈은 NADH의 형광을 측정하기 위해 제작되었으며 아두이노 기반 항온기는 효소-기질 반응에 있어 최적의 온도 조건을 제공하기 위해 제작되었음. 이러한 플랫폼을 이용하면 현장에서 발효제품의 품질 및 발효과정을 현장에서 모니터링 할 수 있으며 더 나아가 보관 환경의 변화로 인한 부패를 예측할 수 있을 것으로 판단됨. 우리는 이 플랫폼을 이용하여 유산균 음료의 젖산 정량분석과 실제로 발효가 진행되는 TMR 사료의 발효과정을 모니터링 및 품질 예측을 시행하였음.

Health and Social Problems of Carbon Monoxide Poisoning from the Usage of Anthracite Coal in Korea

Chung, Yong,Shin, Dongchun,Lim, Youngwook 한국환경독성학회 1990 환경독성보건학회지 Vol.5 No.2