• Journal of The Korean Society of Clinical Toxicology
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• v.2 no.2
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• pp.101-105
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• 2004

Purpose: Paraquat is the most commonly used herbicide in Korea. Exposure to paraquat through the skin has resulted in local irritation or inflammation of varying degree, sometimes severe. The purpose of this study was to review the patients with paraquat poisoning by skin absorption. Methods: We analysed retrospectively the clinical and laboratory findings of 45 patients with paraquat poisoning after dermal exposure, who were admitted to Soonchunhyang University Cheonan Hospital from January 1999 to December 2003. Results: Among 870 cases of paraquat poisoning, 45 cases were exposed to paraquat through the skin. The peak incidence was the fifth decade($40\%$). The clinical symptoms were pain, pruritus, nausea, and vomiting. The major skin lesions were generalized vesicobullae and necrotic erosion in face, scrotum, trunk, upper and lower extremities and etc. All patients were survived after skin contact or inhalation of paraquat. Conclusion: This study illustrates the extreme toxicity of paraquat and demonstrates that lethal quantities of paraquat may be absorbed if repeated exposure to it. Stricter precautions, including the mandatory use of protective clothing, should be recommended whenever this material is used.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.11
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• pp.6884-6889
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• 2014

To understand the governing institutions' arrangement in an old city of the late Joseon dynasty, it is necessary to compare and weigh the detailed old map with regional geographical records Eupji. In particular, the investigation of 'Closure Land Registration Map' is indispensable, which was made in the period of the Japanese occupation. This study aims to restore the urban land lots arrangement of Cheonan-Gun's old center part in the initial period of the Japanese occupation, using the oldest 'Closure Land Registration Map(1940)' of Cheonan-Gun. The results of this study will be helpful in understanding the governing institutions' arrangement of Cheonan-Gun in the late Joseon dynasty.

• Journal of Korean Society for Atmospheric Environment
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• v.24 no.3
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• pp.367-375
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• 2008

To characterize atmospheric particles in Cheonan area, 5 monitoring sites representing highway area, commercial area, residential area, and industrial areas were selected, and the mass concentrations of PM10 and PM2.5 were monitored for 14 days at each site during 2007. The daily average PM10 and PM2.5 concentrations were in the range from 18.5 to $140.9{\mu}g/m^3$ and 8.2 to $116.6{\mu}g/m^3$, respectively, showing the highest mean concentrations at the commercial area site and the lowest concentration at the residential area site. The daily average PM 10 concentrations at Shinan (Commercial area) and Bakseok (Industrial area) sites were exceeded the current National Standard for 1 and 2 days during the monitoring periods. The fractions of PM2.5 in PM10 were above 70% for all sites, indicating fine particles are the major constituent of atmospheric particles in Cheonan. The results indicate that PM10 concentrations in Cheonan are at the concerning level, and the control strategy for fine particles is necessary to address this issue.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.23 no.2
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• pp.63-70
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• 1997

It has been observed that local increase in melanin synthesis or uneven distribution can cause local hyperpigmintation or spot. Pigmentary disorders are caused by various factors, including inflammation, imbalance of hormones, and genetic disorder. Recently the harmfulness of Ultraviolet radiation is increasing due to destruction of ozone layer. Excessive exposure to UV radiation caused post-inflammatory pigmentation. Most women want to avoid uneven skin pigmentation. To satisfy this desire many cosmetic companies have been developing melanogenesis inhibitors and finding promising active agents for use in cosmetic preparations for skin whitening. In cosmetic preparations, many inhibitors such as kojic acid, arbutin, ascorbic acid, and licorice extracts6 have been used as whitening purpose. Plant extracts having an inhibitory effect on melanin formation may be a good choice for cosmetic purpose because of their relatively lower side effects. Therefore, we screened 285 plant extracts for their inhibitory activity in tyrosinase. Of the plant extracts, ramulus mori extracts showed potent tyrosinase inhibition activity. We also identified the active compound in the extract.

• Journal of The Korean Society of Clinical Toxicology
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• v.4 no.2
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• pp.151-154
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• 2006

Acute toxic methemoglobinemia is an infrequent complication of the use of various drugs. Severe methemoglobinemia is very often fatal. Methylene blue is an effective drug in the treatment of methemoglobinemia patients. However, failure to respond to methylene blue has been described in patients with sulfhemoglobinemia, chlorate poisoning, and glucose-6-phosphate dehydrogenase deficiency. It is even possible that hemolysis may occur due to methylene blue treatment itself. We encountered a case of a 71-year-old woman who developed methemoglobinemia caused by alprazolam intoxication. She presented with hemolytic anemia and did not respond to methylene blue. In spite of concerted N-acetylcysteine therapy, the hemolytic anemia became aggravated and the patient died eleven days after intoxication.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.27 no.1
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• pp.73-81
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• 2001

For an attempt to develop safe materials protecting UV-induced skin damage, plant extracts were evaluated for their antioxidative and free radical scavenging activities. From the results of these screening procedures, the ethanol extract of the flowers of Prunus persica was selected for further study. It was found that Prunus persica (50-200 $\mu\textrm{g}$/㎖) inhibited UVB-induced DNA damage measured by tail moment in the Single Cell Gel Electrophoresis(COMET assay) and inhibited UV-induced lipid peroxidation, expecially against UVB-induced peroxidation at higher than 10 $\mu\textrm{g}$/㎖. Also P.persica(100∼1,000 $\mu\textrm{g}$/㎖) inhibited the amount of $\^$14/C-arachidonic acid metabolites release from UVB-irradiated keratinocytes and it possessed the protective activity against UV-induced cytotoxicity of keratinocytes. All these results indicate that the flowers of P. persica extract may be beneficial for protection UV-induced skin damage when topically applied.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.17 no.6
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• pp.39-50
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• 2014

This study was conducted to establish inventory and propose conservation strategy of 'village wetlands' in Cheonan. As results, the village wetlands are defined as such places as palustrine wetland, village embankment, agricultural reservoir or small reservoirs located in or near the village and related to everyday life or farming. Firstly 791 provisional village wetlands were identified in Cheonan by using Arc-GIS 10.1, then 104 wetlands were defined as village wetlands and listed the inventory of Cheonan Village Wetlands after being validated through their area (greater than $1,000m^2$), satellite images, Korea Land Information System, land use map, land coverage map and field survey. Finally the 49 wetlands were selected for detailed surveying, and function assessment. As the result of the wetland function assessments, 11 wetlands were found to have 'high' wetland function (conservation) 30 wetlands were 'average' (enhancement) and 8 wetlands were 'low' (restoration or enhancement). Enhancing biodiversity and ecosystem services through ecological management of wetlands in Cheonan and connecting with an ecological network were proposed.

• Journal of Chest Surgery
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• v.40 no.5 s.274
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• pp.376-379
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• 2007

A 51-year-old male was admitted three month previously with a cardiac stab injury and he underwent direct cardiac repair He had no problem after this event. He complained of dyspnea that stalled 2 months after the original injury. Echocardiography showed severe tricuspid regurgitation and so, chordac replacement and ring annuloplasty was performed. Herein we report on a case of tricuspid valve repair for treating tricuspid insufficiency following a cardiac stab injury.

• Journal of Chest Surgery
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• v.43 no.2
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• pp.232-234
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• 2010

Primary xanthoma of the bone is a rare benign neoplasm, and it is extremely rare to find this in the ribs. It is most commonly reported in soft tissue and it associated with hyperlipoproteinemia. A 54-years-old male who complained of left chest pain had an X-ray taken. It revealed a left 3rd rib tumor. The blood examinations for lipid and protein were normal. A resection was done for tissue examination. The mass was histolopathologically diagnosed as a xanthoma.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.16 no.3
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• pp.19-30
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• 2013

This study was proposed to adaptable species according to climate change using warmth index(WI) in Cheonan-Si. RCP 8.5 was used to estimate change of warmth index(WI) depending on climate change in Cheonan-Si. Climatic change of Cheonan-Si was estimated to change from cool temperate forest central zone to warm temperate forest zone. The following plant species will survive within WI change of Cheonan-Si from 2010 to 2050 : 18 species in the tree layer including Quercus serrata, Q. variabilis, Pinus densiflora, Q. acutissima etc.; 28 species in the shrub layer including Rhus trichocarpa, Lindera obtusiloba, Zanthoxylum schinifolium etc.; 24 species in the herb layer including Oplismenus undulatifolius, Carex lanceolata, etc.; 12 species in the vine plants including Smilax china, Cocculus trilobus, etc.