Publications by authors named "Myungsup Lee"
Article Synopsis
- The study analyzed atmospheric concentrations and patterns of organochlorine pesticides (OCPs) in South Korea over one year, focusing on 22 types using advanced sampling and measurement techniques.
- Key findings revealed that three primary OCPs—pentachlorobenzene, hexachlorocyclohexane, and endosulfan—constituted over 87% of total OCPs, with significant concentration differences noted across different sites, especially Seosan.
- Seasonal variations indicated higher OCP levels in summer due to temperature effects and long-range transport of pollutants, highlighting the influence of local industrial activities and contamination sources on air quality.
Oxidation behavior of nanocomposite films is very important characteristics for application of machining and cutting tools. In this study, Ti-Al-Si-N-O nanocomposite films were fabricated onto WC-Co and Si wafer substrates. The composition of the Ti-Al-Si-N-O films was analyzed by X-ray photo-electron spectroscope (XPS).
View Article and Find Full Text PDFFunctional graded Ti-Al-Si-N-O nanocomposite films were deposited onto WC-Co substrate by a filtered arc ion plating system using TiAl and TiSi composite targets under N₂/Ar atmosphere. XRD and XPS analyses revealed that the synthesized Ti-Al-Si-N-O films were nanocomposite consisting of nanosized (Ti, Al, Si)N crystallites embedded in an amorphous Si₃N₄/SiO₂ matrix. The hardness of the Ti-Al-Si-N-O films exhibited the maximum hardness values of ~47 GPa at a Si content of ~5.
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