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울산지역 대기 중 아황산가스의 시공간적 오염특성(2005-2009)
이윤세 ( Yun Se Lee ),최성득 ( Sung Deuk Choi ),권혜옥 ( Hye Ok Kwon ),김철수 ( Chul Su Kim ),손희식 ( Hee Sik Son ),예진 ( Jin Ye ) 한국환경분석학회 2011 환경분석과 독성보건 Vol.14 No.4
We investigated the temporal and spatial distribution of SO2 measured at 14 air pollution monitoring sites in Ulsan, Korea. The levels of SO2 in Ulsan have continuously decreased since the 1990s, and a recent (2005-2009) annual average concentration of 8 ppb is lower than the national guideline of 20 ppb. However, Ulsan has higher levels of SO2 than any other mega-city in Korea. The average level of SO2 at industrial sites (13.7ppb) is 2.4 times higher than those at residential and commercial sites. According to the measurement data, meteorological condition, and former air dispersion modeling results, it was confirmed that SO2 emitted from the industrial complex was transported to the residential area by sea-land breeze and southeastern seasonal winds. For the improved air quality in Ulsan, the current environmental policy permitting the use of high-sulfur oil (<4%) should be carefully evaluated. The emission of greenhouse gases and hazardous air pollutants (HAPs) as well as SO2 from plants using the high-sulfur oil should be monitored. Furthermore, separated environmental policies for the industrial and residential areas are required for more effective pollution management.
우측 반회후두신경을 침범한 갑상선 유두상암 환자의 수술 후 발생한 양측 성대 마비의 회복 1예
문미진,왕수건,이윤세,임윤성,이진춘,강양호,손석만,김인주,Mun, Mi Jin,Wang, Soo Geun,Lee, Yoon Se,Lim, Yun-Sung,Lee, Jin Chun,Kang, Yang Ho,Son, Seok Man,Kim, In Joo 대한기관식도과학회 2011 大韓氣管食道科學會誌 Vol.17 No.1
Vocal cord paralysis (VCP) is a common complication after thyroidectomy despite the continuity of the recurrent laryngeal nerve (RLN) is preserved. Much efforts have been made into preventing VCP, but few of them focuses on the treatment strategies and prognosis after VCP take place. In this case, patient visited the clinic for papillary thyroid cancer in Rt. thyroid gland without VCP. She underwent total thyroidectomy with central neck dissection. During dissection, Rt main mass was encircling Rt. RLN. To make matters worse, Lt. RLN was severed due to tight attachment with Berry's ligament. After that, intratumoural dissection of Rt. RLN and end to end anastomosis of Lt. RLN were performed with microscopy to preserve the functions of RLNs as much as possible, otherwise permanent bilateral VCPs were inevitable. We report this case, since both vocal cords recovered from VCPs with symmetric, synchronous movements at postoperative follow up.
권혜옥 ( Hye Ok Kwon ),이윤세 ( Yun Se Lee ),예진 ( Jin Ye ),손희식 ( Hee Sik Son ),김철수 ( Chul Su Kim ),최성득 ( Sung Deuk Choi ) 한국환경분석학회 2012 환경분석과 독성보건 Vol.15 No.1
Indoor air quality is an important environmental issue especially for multi-use buildings because many people can be readily exposed to air pollutants. In this study, we collected air samples at eight indoor sites in a new library completed in 2009. Our target compounds were hazardous air pollutants (HAPs) such as formaldehyde (HCHO), 48 volatile organic compounds (VOCs), and 16 US-EPA priority polycyclic aromatic hydrocarbons (PAHs). Their concentrations were 17~124 μg/m3 (mean: 37 μg/m3), 41~90 μg/m3 (mean: 59 μg/m3), and 19.5~94.7 ng/m3 (mean: 37.4 ng/m3), respectively. The highest concentrations of HCHO and VOCs were measured at an auditorium, while the highest concentration of PAHs was measured at a supercomputer room. The main source of HCHO and VOCs in the auditorium seemed to be new furniture, and that of PAHs in the supercomputer room might be circuit boards and chips in computers. The spatial distribution of HAPs in this library suggested that ventilation was a key factor affecting the levels of HAPs in the building.
오주연 ( Joo Yeon Oh ),권혜옥 ( Hye Ok Kwon ),이윤세 ( Yun Se Lee ),박은정 ( Eun Jeong Park ),김철수 ( Chul Su Kim ),손희식 ( Hee Sik Son ),예진 ( Jin Ye ),최성득 ( Sung Deuk Choi ) 한국환경분석학회 2012 환경분석과 독성보건 Vol.15 No.2
In this study, wastewater sludge was collected at a chemical plant in Ulsan, Korea, and the effect of ultrasonic treatment on sludge reduction and heavy metal leaching was investigated. In lab-scale experiments, the amount of sludge decreased with increasing ultrasonic irradiation intensity (100~600 W) and time (0.5~30 min). A pilot-scale ultrasonic reactor made in this study showed the highest performance (i.e., 46.2% of sludge reduction) in a batch mode operation. These results demonstrated that the ultrasonic treatment was useful for the reduction of sludge. On the other hand, the levels of heavy metals (Cd, Pb, Cu, and Zn) in supernatants of the sludge samples after the ultrasonic treatment substantially increased, addressing the need for proper management of toxic chemicals after dehydration of sonicated sludge. The reason for the sludge reduction and heavy metal leaching after the ultrasonic treatment was the disintegration of sludge flocs and cell walls. Therefore, an advanced ultrasonic technology considering both sludge reduction and leaching of toxic chemicals should be developed for practical applications.
대도시의 다환방향족탄화수소 대기오염특성 규명을 위한 예비연구
정근식 ( Kuen Sik Jung ),권혜옥 ( Hye Ok Kwon ),이윤세 ( Yun Se Lee ),정새미 ( Sae Mi Jung ),오정은 ( Jeong Eun Oh ),최성득 ( Sung Deuk Choi ) 한국환경분석학회 2013 환경분석과 독성보건 Vol.16 No.4
Air pollutants are an important environmental concern particularly for the mega-city which has various pollutant sources. As a preliminary study, we investigated the levels of criteria air pollutants (SO2, CO, NO2, O3, PM2.5, and PM10) and polycyclic aromatic hydrocarbons (PAHs) in Busan, Korea during April~November 2010. Among the 16 US-EPA priority PAHs, 13 PAHs excluding naphthalene, acenaphthylene, and acenaphthene were quantified. The levels of gaseous and particulate PAHs were 1.58~9.52 ng/m3 (mean: 4.77 ng/m3) and 0.98~5.21 ng/m3 (mean: 2.84 ng/m3), respectively. PAHs were positively correlated with SO2, NO2, and PM2.5, suggesting that they had common emission sources. According to a pollution rose diagram, PAHs and criteria air pollutants seemed to be influenced by major wind directions, but this effect was not so significant due to geographical characteristics. On the basis of this study, the spatial distribution of PAHs can be simulated with those of criteria air pollutants.