• Analytical Science and Technology
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• v.17 no.5
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• pp.410-415
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• 2004

In order to learn the emission characteristics of hazardous pollutants associated with environmental tobacco smoking (ETS), we measured the concentrations of major aromatic VOC and carbonyl compounds released from ETS. By acquiring the different smoke types of ETS, we were able to determine that the concentrations of those species range from ppb (normal exhaled air of smoker prior to smoking) to ppm levels (direct release of ETS without filter). Using these measurement data, we also evaluated the body-retaining rate of these compounds as the result of ETS. The results of our analysis indicated that predominant portion of them (e.g., > 99%) are retained as the result of cigarette smoking. To learn more about the potential impact of ETS, more extensive study may be required to assess the gross picture of pollutant deposition inside respiratory intake and their health-effects.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2008.11a
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• pp.571-574
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• 2008

계량 습식방법으로 실험한 결과 다른 처리 방법과는 달리, 물리성과 환경성 모든 항목에서 적합함을 나타내었다. 그러므로 원예농업용 폐비닐의 저급물리성과 중금속등의 유해 물질 검출의 우려로 인한 사용기피를 조금이나마 불식하고 기존에 유해성분 검출로 토양이나 작물에 문제가 됐던 원예농업용 자재를 대체할 수 있는 자재로서의 가능성을 보였다고 할 수 있다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.04a
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• pp.133-134
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• 2002

미량독성 유해물질은 크게 중금속 성분과 잔류성 유기오염물질 (POPs, persistent organic pollutants)로 나눌 수 있다. 아직은 우리 사회의 관심이 직접 주변에서 확인할 수 있는 국내 배출에 머물고 있으나 미량독성 유해물질로 분류되는 많은 물질들이 분해가 어렵고 대기 중 체류시간이 길어 장거리 이동의 가능성이 매우 크다. 실제 오염물질 배출이 거의 없는 북극의 북극곰, 물개, 물고기에서도 미량독성 유해물질 검출이 보고되고 있는데, 다른 지역에서 배출된 독성물질들이 침적과 휘발을 반복하며 이동하는 가운데 기온이 낮은 극지방에 축적됨으로써 나타난 현상이다. (중략)

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.10a
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• pp.851-853
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• 2014

현대 사회는 모든 분야에서 다양한 분야들의 기술들이 융합되는 사회이며, 이로 인해 각종 환경적 위험 요소 등이 존재한다. 그중 한가지는 유해 가스에 의한 피해이다. 산업이 발전하고, 편의 시설등이 늘어나면서 다양한 시설들이 설치되고 있다. 하지만 이와 함께 시설물들이 가지는 위험도 또한 높아지고 있다. 이에 본 연구에서는 센서를 이용한 위험요소 탐지와 환경측정 자료를 기반으로 일상 생활에 접할 수 있는 위험요소를 파악하고 개선하고자 하였다. 진행은 유해성분을 측정할 수 있는 센서를 이용한 시스템을 구성하고, 자료 분석을 통한 개선사항를 도출하는 방식을 취하였다.

• Journal of Ginseng Research
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• v.23 no.1 s.53
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• pp.44-49
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• 1999

Cu/Zn superoxide dismutase (SOD1) is a protective enzyme responsible for the dismutat ion of superoxide radicals within the cell by converting superoxide radicals to oxygen and hydrogen peroxide, which is in turn changed to oxygen and water by catalase. Previously, we reported that the panaxadiol (PD) and its ginsenoside $Rb_2$ induced the expression of SOD1 gene through AP2 binding site and its induction. Here, we examined the effect of subfractions of panaxadiol ginsenosides, which were extracted from different parts of ginseng root that possess various ratios of panaxadiol to panaxatriol, on the induction of SOD1 gene expression. To explore this possibility, the upstream regulatory region of SOD1 was linked to the chloramphenicol acetyl transferase (CAT) structural gene and introduced into human hepatoma HepG2 cells. We observed that the transcriptional activation of SOD1 was proportional to the contents ratio of panaxadiol ginsensides. Consistent with this results, the total extract portion prepared from the finely-hairy root, which contains the higher ratio of panaxadiol to panaxatriol about 2.6, increased the SODl transcription about 3 fold. This results suggest that the panaxadiol fraction could induce the SOD1 and total extract of the ginseng finely-hairy root would be a useful material as a functional food for the SOD1 inducer.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2008.11a
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• pp.277-282
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• 2008

We developed fixed aerosol auto fire-extinguishing systems which are different from fire suppression systems like powder extinguisher or halon extinguishing system, etc. Fixed aerosol auto fire-extinguishing substances which are including solid alkali salts generated by combustion of solid composition. It represents high fire suppression ability due to particle friendly auto fire-extinguishing systems for the reason of excluding toxic substances in it's composition.

• The Journal of the Convergence on Culture Technology
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• v.9 no.1
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• pp.565-570
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• 2023

There are people who are sensitive to cosmetic ingredients, such as pregnant women and skin disease patients. There are also people who experience side effects from cosmetics. To avoid this, it is cumbersome to search for harmful ingredients in cosmetics one by one when shopping. In addition, knowing and remembering functional ingredients that suit you is helpful when purchasing new cosmetics. There is a need for a system that allows you to immediately know the cosmetics ingredients in the field through photography. In this paper, we introduce an application for smartphones, <Hwa Ahn>, which allows you to immediately know the cosmetics ingredients by photographing the ingredients displayed in the cosmetics. This system is more effective and convenient than the existing system in that it automatically recognizes and automatically classifies the ingredients of the cosmetic when the camera is illuminated on the cosmetic ingredients or retrieves the photos of the cosmetic ingredients from the album. If the system is widely used, it is expected that it will prevent skin diseases caused by cosmetics in daily life and reduce purchases of cosmetics that are not suitable for you.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.8 no.2
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• pp.73-84
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• 1975

The present study was conducted to evaluate the effects of oil spill from the wastewater of Yeosu Refinery on water quality of hard clam culture beds in Taein-Ri, Kwang Yang Bay. Wastewater and oil spill may reach to the culture beds in 6-8 hours by tidal current movement. Water quality is nearly normal as unpolluted sea water except the concentration of n-hexane extractive chemicals which shows higher than unpolluted sea water in period of September to October in 1973. It may be caused by wastewater of Yeosu Refinery.

• Analytical Science and Technology
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• v.21 no.2
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• pp.65-83
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• 2008

It is noted that illegal hazardous foods containing unauthorized drugs or synthetic drung analogues are increasing. Especially, reported are unknown compounds that have the modified chemical structures of the anti-impotence drugs such as sildenafil, vardenafil, and tatalafil. In addition, it is very reserved, since illegal synthetic compounds having similar chemical structures modified from anti-impotence drug to avoid the government inspection are not proved their safety at all. This review in ulation to food safety, lists the illegal compounds added to foods and describes about the analytical methods to chanacterize 16 anti-impotence drug analogues such as homosildenafil, hongdenafil, pseudovardenafil, aminotadalafil, hydroxyhomosildenafil, hydroxyhongdenafil, dimethylsildenafil, xanthoanthrafil, hydroxyvardenafil, norneosildenafil, demethylhongdenafil, piperidinohongdenafil, carbodenafil, thiosildenafil, dimethylthiosildenafil, and acetylvardenafil.

• Environmental engineer
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• s.168
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• pp.82-85
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• 2000