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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Environmental Health Sciences
Journal Basic Information
Journal DOI :
Korean Society of Environmental Health
Editor in Chief :
Volume & Issues
Volume 32, Issue 6 - Dec 2006
Volume 32, Issue 5 - Oct 2006
Volume 32, Issue 4 - Aug 2006
Volume 32, Issue 3 - Jun 2006
Volume 32, Issue 2 - Apr 2006
Volume 32, Issue 1 - Feb 2006
Selecting the target year
Characteristics of Nano-Particles Exhausted from Diesel Passenger Vehicle with DPF
Park, Yong-Hee ; Shin, Dae-Yewn ;
Korean Journal of Environmental Health Sciences, volume 32, issue 6, 2006, Pages 533~538
The nano-particles are known to influence the environmental protection and human health. The relationships between transient vehicle operation and nano-particle emissions are not well-known, especially for diesel passenger vehicles with DPF(Diesel Particulate Filter). In this study, two diesel passenger vehicles were measured on a chassis dynamometer test bench. The particulate matter (PM) emission of these vehicles was investigated by number and mass measurement. The mass of the total PM was evaluated using the standard gravimetric measurement method, and the total number concentrations were measured on a ECE15+EUDC driving cycle using Condensation Particle Counter (CPC). According to the investigation results, total number concentration was
and mass concentration was 0.71mg/km. About 99% of total number concentration was emitted during the
because of engine cold condition. In high temperature and high speed duration, the particulate matter was increased but particle concentration was emitted not yet except initial engine cold condition According to DPF performance deterioration, the particulate matter was emitted 2 times and particle concentration was emitted 32 times. Thus DPF performance deterioration affects particle concentration more than PM.
The Utility of Measuring Assimiliable Organic Carbon (AOC) as an Indicator of Biostability in Distribution Systems for Finished Water
Chang, Young-Cheol ; Toyama, Tadashi ; Jung, Kweon ; Kikuchi, Shitaro ;
Korean Journal of Environmental Health Sciences, volume 32, issue 6, 2006, Pages 539~542
The objective of this paper is to compare the applicability of assimilable organic carbon (AOC) or biodegradable dissolved organic carbon (BDOC) for quantifying biodegradable organic material (BOM) and bio-stability in distribution systems for a variety of finished waters. The study the data is derived from was part of an AWWARF and Tampa Bay Water tailored collaboration project to determine the effect of blending different waters on distribution system water quality. Seven different finished waters were produced from surface, ground, or brackish water on site and fed 18 independent pilot distribution systems (PDSs), either as single finished water or as a blend of several finished waters. AOC and BDOC have often been used as indicators of bacterial regrowth potential in distribution systems. In this study, AOC was the more useful assay of the two for the BOM concentrations observed in the PDSs. BDOC did not distinguish BOM while AOC did at the low BOM levels from many of the advanced treatments (e.g. RO,
). AOC in contrast allowed much more meaningful calculations of the consumption or production of AOC as the blends passed through the PDSs even for very low BOM blends. In addition, meaningful trends corresponding to changes in heterophic plate count (HPC) were observed for AOC but not for BDOC. Moreover, AOC stability was associated with waters produced from advanced membrane treatment.
Seasonal Size Distribution of Atmospheric Particles in Iksan, Korea
Kang, Gong-Unn ; Kim, Nam-Song ; Rhim, Kook-Hwan ;
Korean Journal of Environmental Health Sciences, volume 32, issue 6, 2006, Pages 543~555
During a twenty-day period in 2005, a nine-stage Andersen cascade impactor was used to determine the seasonal size distribution of atmospheric particles and its inorganic ion species sampled for 24hr in Iksan city, located southwest of the Korean peninsula. Samples were analyzed for major water-soluble ion species using Dionex-100 ion chromatograph. Average fine and coarse mass concentrations of atmospheric particles were, respectively, 31.4 and
in spring and 35.8 and
in fall-winter during the sampling period of 2005, while measurements of 69.8 and 9.9 were obtained in the sampling period of summer, The size distribution of particulate mass concentration during the non-Asian dust period was generally bimodal, whereas the size distribution of particulate mass concentration during the Asian dust period was unimodal due to the significant increase of coarse particles, which originated from long-range transport of soil dust particles from loess regions of the Asian continent. Among ionic species,
were mainly distributed in fine particles due to their characteristics of emission sources and gas-to-particle conversion, while
were dominantly in coarse particles. However,
were distributed in both coarse particles and fine particles. Although
was mainly distributed in fine particles, the size distributions of
in coarse mode were significantly increased during the Asian dust events compared to those during the non-Asian dust period.
showed the most abundant species in the atmospheric particles during the Asian dust period.
was found to mainly exist as
in fine particles.
A Survey on Some Heavy Metal Contents of Water and Rice in the Jeon-buk Area of Korea
Kim, Jong-Gyu ; Lee, In-Kyu ;
Korean Journal of Environmental Health Sciences, volume 32, issue 6, 2006, Pages 556~559
This study was performed to investigate the levels of cadmium (Cd), copper (Cu), lead (Pb), and zinc (Zn) in water and rice samples taken from five sites on a stream used for agricultural water in the Jeon-buk area, Korea. The water samples were randomly collected by the recommendations of the World Health Organization, and rice samples were randomly collected from rice paddy. The water and rice samples were analyzed by the recommendations of Food Code of Korea and using inductively coupled plasma spectrometer. Although there was variation between sampling sites, the levels of the metals in rice were on average much higher than those in water. The ratios of metal levels of rice to water were:
for Zn. These results suggest that there were transfer and bioaccumulation of the metals from the water to the rice taken place.
Analysis of Fra-X Gene Using Hair Root DNA
Lee, Ju-Young ; Choi, Won-Chul ;
Korean Journal of Environmental Health Sciences, volume 32, issue 6, 2006, Pages 560~565
Extract of DNA for analysis of fragile X syndrome is usually performed by blood, the researches using hair root as specimen have been gradually spread. In this study, analyze fra X gene of the patients in mentally retarded children facilities was conducted using hair root DNA with molecular biologic test (PCR). The number of total subjects was 24, boys were 12, the average age was
, and girls were 12, the average age was
. In girls, normal size of band of 222 bp appeared in all lanes. Also, in all lanes except control in 517 bp, micro band appeared. Moreover, with appearance of band of 1198bp in lanes 2, 3, 4, 5, it is estimated that it is the band of full mutation whose CGG repeated sequences are more than 200. But it showed the peculiarity that it appeared with normal band in all the same lanes, thus it is not reasonable to judge it is the band of full mutation and further studies are needed. These results appeared in 50%, 6 of 12 mentally retarded girls. As the result of mentally retarded boys, normal band appeared in about 222 bp in control, however in experiment group, normal band did not appear. In 43%, 7 out of 12 boys, band did not either appeared in 1198bp, which showed different patterns from that of girls.
Effects of Natural Extracts on COX-1 and COX-2 mRNA Expression on UVB-induced Skin Inflammation in C57BL/6 Mouse
Ahn, Ryoung-Me ;
Korean Journal of Environmental Health Sciences, volume 32, issue 6, 2006, Pages 566~570
Exposure to ultraviolet B(UVB) radiation causes skin inflammation such as pigmentation and the induction of cyclooxygenase-2(COX-2) gene expression. In this study, we investigated the effect of natural extracts from Tea, EGb 761 and Korean red ginseng(KRG), on the pigmentation and expression of COX-1 and COX-2 mRNA in UVB-irradiated C57BL/6 mice. Before UVB irradiation, the skin color was significantly showed the lightening effect by topical application of natural compounds (p<.05). In the case of UVB irradiated mice, we observed a decrease in pigmentation by compounds (p<.05). In irradiated skin, COX-1 mRNA expression is not changed following UVB irradiation, but COX-2 gene increases. Also, natural compounds lowered mRNA levels of COX-2. Therefore, these results suggest that COX-2 mRNA increases by UVB irradiation. Also, Tea, EGb 761 and KRG as a topical application may inhibit skin pigmentation and modulate COX-2 mRNA level.
Assessing the Health Benefits of the Seoul Air Quality Management Plan Using BenMAP
Park, Jeong-Im ; Bae, Hyun-Joo ;
Korean Journal of Environmental Health Sciences, volume 32, issue 6, 2006, Pages 571~577
Health benefits from implementing air quality control measures were assessed using the Environmental Benefits Mapping and Analysis Program (BenMAP). BenMAP developed by US EPA is a GIS-based software tool that estimates the health impacts and associated economic values connected with changes in ambient air pollution. Once a set of BenMAP-required data was collected, the health benefits from implementing Seoul Air Quality Management Plan (SAQMP), an official AQ improvement plan for Seoul Metropolitan Area, was assessed using BenMAP. The PM10 concentrations assuming the SAQMP implemented successfully were predicted with the MM5 (Mesoscale Meteorological model version 5)/CMAQ (Community Multiscale Air Quality) model. A PM 10 exposure related premature mortality function was adopted trom a well-known epidemiology study. Economic valuation functions driven from benefit transfer methods were utilized. Through the SAQMP, PM10 concentrations were estimated to be lowered by
depending on air quality modeling grids. 5,569 premature deaths (95% CI
deaths) could be avoided in the Seoul Metropolitan Area. The economic value of the deaths avoided was estimated to $13.2 billion
using the benefit transfer value. BenMAP could be a useful tool for developing effective air quality improvement policy, enabling the policy makers to anticipate the effects of regulatory changes on people's health and the economy.
Effect of C/N Ratio on Composting Treatment of TNT-Contaminated Soil
In, Byung-Hoon ; Park, Joon-Seok ; NamKoong, Wan ;
Korean Journal of Environmental Health Sciences, volume 32, issue 6, 2006, Pages 578~584
This research was conducted to estimate the effect of C/N ratio control on composting of TNT (2,4,6 trinitrotoluene)-contaminated soil. Glucose or acetone was selected to control C/N ratio of the contaminated soil. The C/N ratios of the controlled experiment and no controlled one were 26.0 and 6.6, respectively. During 45days, the degradation efficiency (96.0 or 91.8%) of acetone or glucose C/N ratio controlled soil was higher than that (78.4%) of no C/N ratio controlled case. The first order degradation rate constant of glucose or acetone C/N ratio control was 0.0641 or 0.0820/day. This constant was over twice 0.0356/day of no C/N ratio control. The C/N ratio control with glucose or acetone also showed a rather high
evolution than that without C/N ratio control. It was proven that C/N ratio control for composting of TNT-contaminated soil improved the treatment efficiency.