Environmental and Body Concentrations of Heavy Metals at Sites Near and Distant from Industrial Complexes in Ulsan, Korea

BACKGROUND: Industrial pollution may affect the heavy metal body burden of people living near industrial complexes. We determined the average concentrations of atmospheric heavy metals in areas close to and distant from industrial complexes in Korea, and the body concentrations of these heavy metals in residents living near and distant from these facilities. METHODS: The atmospheric data of heavy metals (lead and cadmium) were from the Regional Air Monitoring Network in Ulsan. We recruited 1,148 participants, 872 who lived near an industrial complex (“exposed” group) and 276 who lived distant from industrial complexes (“non-exposed” group), and measured their concentrations of blood lead, urinary cadmium, and urinary total mercury. RESULTS: The results showed that atmospheric and human concentrations of heavy metals were higher in areas near industrial complexes. In addition, residents living near industrial complexes had higher individual and combined concentrations (cadmium + lead + mercury) of heavy metals. CONCLUSION: We conclude that residents living near industrial complexes are exposed to high concentrations of heavy metals, and should be carefully monitored.

Modeling the effects of pollutant emissions from large industrial complexes on benzene, toluene, and xylene concentrations in urban areas

This study utilized the Community Multiscale Air Quality model to simulate the spatial distribution of benzene, toluene, and xylene (BTX) concentrations from large national industrial complexes (IC) located in the Ulsan metropolitan region (UMR). Through controlling pollutant emissions from major IC, this study performed a quantitative analysis of the influence of pollutant emissions on BTX concentrations in surrounding urban areas. The results showed that approximately 40% of the annual average BTX concentrations in nearby urban grids were directly influenced by pollutant emissions from the IC. Seasonal modeling results indicated that average BTX concentrations were high around petrochemical complexes, with higher concentrations in the surrounding urban areas during the summer (July). All three of the BTX pollutants showed similar seasonal differences. Daily contributions differed significantly throughout the modeling period, with some values reaching a maximum of 80% during July. Overall, when urban areas were located downwind of the IC, contributions rose. Moreover, this study compared the differences in BTX contributions at each measurement point within the IC and urban areas, which showed that the influence of the IC emissions decreased significantly with distance. The spatial distribution and direct influence of the IC on BTX concentrations in the UMR identified through this study could be used to provide input data in environmental epidemiological studies.

The Construction of the Faculty of Hamheung Medical College in North Korea, 1946-48: An Unrest Coexistence of Political Ideology and Medical Expertise / 의사학

This paper aims to reveal how Hamheung Medical College in North Korea kept up its faculty with the trend of a new political system. The time period consists of three series of evaluations that occurred between the start of a reformation action in 1946 and the establishment of the regime in 1948. At the time, it was difficult to secure college faculty in the medical field, because of a serious shortage of medical personnel. Moreover, the problem in the recruitment of faculty at the medical college grew bigger since the members were required to have a high level of political consciousness. Then how did Hamheung Medical College accomplish this ideal securing of faculty that possessed political ideology and medical expertise? For the first time, a faculty evaluation at the local level was carried out and got rid of a few pro-Japanese or reactionary factions but maintained most of the faculty. Although academic background and research career of the faculty were considered, securing of the manpower in terms of number was crucial for the reconstruction of a professional school level. At the second time, as the central education bureau's intervention tightened the censorship, most of the faculty were evaluated as unqualified. Indeed, it was difficult to satisfy the standard of professionalism which emphasized a high level of academic career and political thought that included affiliation of Workers' Party of North Korea. The Medical College could not find faculty that could replace those professors and therefore, most of them maintained their faculty positions. Since then, the faculty who received excellent evaluations led the school at the very front. At the third time, the Medical College itself led the evaluations and implemented more relaxed standards of political ideology and medical expertise. Faculty who were cooperative to the reformation actions that North Korea carried forward or had working experience at the hospital and health service received a high level of recognition. Accordingly, the Medical College expanded itself by securing many professors, but also embodied a large gap of academic and ideological levels between them. Hence, the political ideology and medical expertise, which were set forth as the requirements for faculty, were constructed in the space of political ideal and social reality. Despite the high criteria the North Korean Government made, Hamheung Medical College's faculty fell below the average in terms of ideological and academic standards. As a way to compensate this, professors who greatly satisfied the both virtues were placed as leaders and, for supporting them, professors who taught the general education curriculum were recruited largely. And also, it appointed a large number of medical doctors who accumulated experiences in the field as new professors. Nevertheless, the Medical College struggled to raise the quality of medical education and was unable to prevent a part of its faculty from leaving to South Korea in the time of the Korean War. Thus, the political and academic virtues of the faculty at that time were not just simply about the professor individuals but were interrelated with the medical education and health care system in North Korea.

Becoming Medical Doctors in Colonial Korea: Focusing on the Faculty of Medical Colleges in Early North Korea / 의사학

This paper traces how Koreans of north area became medical doctors in colonial Korea. Most of the past research have focused only on the well-known medical doctors, or even when they discussed a great number of doctors, many research tended to only pay attention to the explicit final results of those doctors. This research, on the other hand, includes ordinary medical doctors as well as the renowed ones, and adjusts the focus to the lifetime period of their growth and activities. As a result, the misunderstanding and obscurity about the Korean medical doctors of north area during this period have been cleared. The new characteristics of the Korean medical doctors of this period have been found, along with their embodiment of historical significance. At the time, Koreans had to get through a number of qualifications in order to become doctors. First is the unique background of origin in which the family held interest in the modern education and was capable of supporting it financially. Second is the long-term status of education that the education from elementary to high school was completed without interruption. Third is the academic qualification that among various institutions of higher education, medical science was chosen as a major. Fourth is the condition of career in which as the career as a doctor had consistently continued. Thus, in oder to become a modern medical doctor, Koreans had to properly complete these multiple steps of process. The group of Korean medical doctors in north area, which was formed after getting through these series of process, possessed a number of characteristics. Firstly, as the upper-middle classes constituted the majority of medical doctors in Korea, the societal status of doctors rose and the foundation for the career as a doctor to be persisted as the family occupation settled. Secondly, the research career and academic degree became the principal method to escape from the discrimination and hierarchy existed between doctors. A PhD degree, especially, was the significant mark for clearly displaying the abilities and outcomes of the doctors. Lastly, the research career, education experience, clinical training and such that the Korean doctors of the period had built up were weak at the time, however, they were important sources for the future medical science development. Indeed, after Liberation, the rapid settlement and growth of Korea's medical science field were largely beholden to thus. Therefore, the growth of the Koreans as doctors did not cease in colonial Korea, but instead continued onto the history of future generations. In spite of the fact that the Korean doctors's growth and activities were greatly limited under the forceful policy of colonial domination of the era, the efforts the Korean doctors had put were not in vain. Likewise, if we do not fix our attention at the dominating policy and system, but rather put together the actors' correspondence and struggles of the period, then the Korean doctors will be a part of the living history. Hereby, the clue to the paradox between the suppression of medical science in colonial Korea and its leap after Liberation can be untied.

Spatial analysis of PM10 and cardiovascular mortality in the Seoul metropolitan area

OBJECTIVES: Numerous studies have revealed the adverse health effects of acute and chronic exposure to particulate matter less than 10 mum in aerodynamic diameter (PM10). The aim of the present study was to examine the spatial distribution of PM10 concentrations and cardiovascular mortality and to investigate the spatial correlation between PM10 and cardiovascular mortality using spatial scan statistic (SaTScan) and a regression model. METHODS: From 2008 to 2010, the spatial distribution of PM10 in the Seoul metropolitan area was examined via kriging. In addition, a group of cardiovascular mortality cases was analyzed using SaTScan-based cluster exploration. Geographically weighted regression (GWR) was applied to investigate the correlation between PM10 concentrations and cardiovascular mortality. RESULTS: An examination of the regional distribution of the cardiovascular mortality was higher in provincial districts (gu) belonging to Incheon and the northern part of Gyeonggido than in other regions. In a comparison of PM10 concentrations and mortality cluster (MC) regions, all those belonging to MC 1 and MC 2 were found to belong to particulate matter (PM) 1 and PM 2 with high concentrations of air pollutants. In addition, the GWR showed that PM10 has a statistically significant relation to cardiovascular mortality. CONCLUSIONS: To investigate the relation between air pollution and health impact, spatial analyses can be utilized based on kriging, cluster exploration, and GWR for a more systematic and quantitative analysis. It has been proven that cardiovascular mortality is spatially related to the concentration of PM10.