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대전 3, 4 공단지역의 대기 중 PM 2.5내 미량금속의 특성
임종명,이현석,이진홍 忠南大學校 環境問題硏究所 2003 環境硏究 Vol.21 No.-
This study centered on the quantitative analysis of about 27 trace metals including toxic ones of airborne PM 2.5 in the 3rd and 4th industrial complex area of Daejeon city, Korea. For analytical quality control, the certified reference material (NIST, the National Institute of Standards and Technology, U.S.A., SRM 2783, Air particulate on filter media) was used. The errors relative to SRM values of Sb, Mn, V, Ca, Mg, Na, K, Ti, Co, Zn, and Sm fell below 5%, while those of Cr, Fe, Ba, Th, Ce, Al, and Cu were less than 10%. From the results of the quantitative analysis using INAA, the concentxation of toxic metals such as As, Mn, Se, V, and Zn were 2.40±1.99ng/m^(3), 6.54k3.15 ng/m^(3), 1.17±0.66 ng/m^(3), 1.1150.58 ng/m^(3), 52.31±25.92 ng/m^(3), respectively. If compared in terms of enrichment factors, it was found that certain elements (e.g., In, Cu, Zn, As, C1, I, Br, Sb, and Se) are enriched in PM 2.5 samples of the study site. The results of factor analysis by SPSS shows that 70.0% of total variance is well explained.
ICP-AES를 이용한 대기분진 중 중금속 분석에 대한 정도관리
임종명,이현석,이진홍 忠南大學校 環境問題硏究所 2003 環境硏究 Vol.21 No.-
In this study, factors of quality control such as laboratory environment, capability of instrument/equipment, method of analysis, calibration, and standard solution were investigated to obtain quality assurance when analyzing airborne heavy metals (e.g., Pb, Cr, Cd, Cu, Mn, Ni, Fe) using ICP-AES. A procedure of quality assurance and evaluation method of uncertainty are also suggested by applying ISO Guide. The suggested process of quality assurance will be helpful for the national monitoring network to produce better data.
임종명,이현석,이진홍 忠南大學校 環境問題硏究所 2002 環境硏究 Vol.20 No.-
Using INAA, which has been thought to be one of the best analytical techniques for airborne particulate matters, this study centered on the quantitative analysis of 32 metal elements within Asian Dust aerosols. Concentrations of REEs of crustal origin, such as Ce, Cs, Dy, La, Sc, and Sm were more than 8.5 times higher in Asian Dust aerosols. In addition, major crustal elements, such as Al, Ca, Co, Fe, K, Mg, Mn, and Ti showed more than 3 times higher concentrations in those aerosols, which made PM 10 and all metal concentrations be also about 3.0 and 4.8 times higher, respectively. However, concentrations of anthropogenic origin, such as As, Br, Ci, I, In, Sb, Se, and Zn were increased to be a little higher, which means no great effect of Asian Dust on these elements.
액체크로마토그래피/질량분석법을 이용한 랫트 혈장내의 Surfactin C의 정량법에 관한 연구
임종환,김명석,이동연,이상훈,백경진,김태원,정두순,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-
Surfactin isolated from Bacillus subtilis has a strong surface tension-lowering activity, together with antiviral, antitumor, fibrinolytic and hypocholesterolemic activities. LC/MS is a simple, rapid and effective technique for the determination of surfactin C in rat serum. The separation of surfactin was achieved on reverse phase column. The mobile phase consisted of 0.1% trifluoracetic acid in water (A) and acetonitrile (B). As a result of analysis of blank rat serum samples, matrix interference was not shown. The values of precision and accuracy were satisfied w the guideline. A newly developed LC/MS method for the determination of surfactin C was successfully applied in its pharmacokinetic analysis.
토끼에서 Etofenprox와 Spinosad 합제의 국소자극성 시험
황윤환,김명석,송인배,박병권,양승호,임용현,송치용,안성한,남현수,임정교,정상일,명노일,윤효인 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2008 動物醫科學硏究誌 Vol.15 No.1
This study was performed to evaluation the skin and eye irritation of etofenprox 8% and spinosad 4% combination in male New Zealand White rabbits. In skin irritation test, the combination of etofenprox and spinosad did not showed any change of body weight but caused slight skin irritation with the P.I.I. (primary irritation index) value 0.25. The etofenprox and spinosad combination showed severe eye irritation 1 h, 24 h, 48 h, and 72 h after ocular treatment, having the A.O.I. (acute ocular irritation) value of 37.3. Therefore, these result indicated that the combination of etofenprox and spinosad might be irritant formulation on eye and skin.
ICR계 마우스에서 홍화씨 에탄올 추출물의 급성독성시험
황윤환,박병권,임종환,김명석,송인배,명노일,정상일,윤효인 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2008 動物醫科學硏究誌 Vol.15 No.1
The present study was carried out to investigate the potential acute toxicity of safflower seed by a single oral dose in ICR mice. Twenty animals of each sex were randomly assigned to four groups of 5 rats each and were administered singly by gavage at dose levels of 0, and 2,500 mg/kg bodyweight. Mortalities, clinical findings, and body weight changes were found and complete gross postmortem examinations were performed. Throughout the study period, no treatment-related deaths were observed. There were no adverse effects in clinical signs, body weight, and gross findings at any dose tested. The results showed that the single oral administration of safflower seed did not cause any toxic effect at the dose levels of 2,500 mg/kg in rats and the minimal lethal dose was considered to be over 2,500 mg/kg body weight for both sexes.
Pyriminobac-methyl과 azimsulfuron 합제의 신규제형인 분산형 정제에 대한 독성 평가
백경진,이동연,이상훈,김태원,정두순,임종환,김명석,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-
Dispersible tablets disintegrate either to form a stabilized suspension rapidly in water, or to disperse instantaneously in the rice field without the aid of water. In this study, the newly formulated dispersible tablet form of herbicidal combination, pyriminobac-methyl and azimsulfuron, was evaluated the safety for human and animals in the toxicological viewpoints. The LD_(50) value of dispersible tablet form for pyriminobac-methyl and azimsulfuron was above 2,500 mg/kg for the oral route and above 2,000 mg/kg for the dermal route. It is considered to have low acute oral and dermal toxicity based on the findings of the present studies. In addition, the combination of pyriminobac-methyl and azimsulfuron showed mild skin irritant under the conditions of this study and conjunctival redness and slight opacity on cornea appeared from 1 hour after application.
신규개발된 제초제 metamifop 현탁농축액제에 대한 급성독성평가
이동연,이상훈,백경진,김태원,정두순,임종환,김명석,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-
Metamifop, (R)-2-[4-[(6-chloro-2-benzoxazolyloxyphenoxy]-N-(2-fluorophenyl)-N-methyl propanamide, was newly developed by Dongbu Hannong Chemicals in Korea. In the present study we conducted acute oral toxicity and acute dermal toxicity test. The values of LD_(50) of metamifop was found to be over 5,000 mg/kg for ICR mice. On the other hand, metamifop showed no acute dermal toxicity to SD rats.
Carbosulfan의 피부자극성, 안점막 자극성 및 피부감작성등의 알러지성 효과에 관한 연구
이상훈,이동연,백경진,김태원,정두순,임종환,김명석,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-
Many studies have been published on the human health effects of carbosulfan toxicity. Carbosulfan used as an insecticide can produce an irritating and allergenic effect when acting on the skin. In this study, a sensitization test on albino guinea pigs and intradermal reactivity and occular irritation test on albino rabbits were carried out with carbosulfan. Signs of acute skin inflammation appeared along with the clinical symptom of chronic dermatosis caused by the solution irritating characteristics. Moreover, carbosulfan showed severe eye irritation with conjuctival redness and severe opacity on cornea. Preventive measures should involve workers' obligatory instructions on the noxious impact on human skin and strict observance of industrial safety rules.