• The Bulletin of The Korean Astronomical Society
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• v.32 no.2
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• pp.59.2-59.2
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• 2007

• Bulletin of the Korean Chemical Society
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• v.31 no.8
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• pp.2413-2415
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• 2010

• Bulletin of the Korean Chemical Society
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• v.31 no.8
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• pp.2416-2418
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• 2010

• Proceedings of the Korean Ceranic Society Conference
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• 2000.04a
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• pp.16.1-16.1
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• 2000

• Journal of the Korean institute of surface engineering
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• v.29 no.6
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• pp.640-643
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• 1996

The vapor phase hydrogen trancefer reaction between acrolein and isopropyl alcohol has been investigated over $Ag_2O$-Cao catalyst. A high selectivity of allyl alcohol was obtained at 88.7% with conversion of 75.4%.

• Proceedings of the Korean Ceranic Society Conference
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• 2002.10a
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• pp.171.1-171
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• 2002

• Proceedings of the Materials Research Society of Korea Conference
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• 2006.11a
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• pp.10.2-10.2
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• 2006

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.109.4-109
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• 1998

• Economic and Environmental Geology
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• v.46 no.5
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• pp.425-444
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• 2013

This study was carried out in order to determine the remediation of total petroleum hydrocarbons (TPHs), trichloroethylene (TCE), perchloroethylene (PCE), benzene, toluene, ethylbenzene and xylenes (BTEX) compounds for non-aqueous phase liquids (NAPLs) using in-situ air sparging (IAS) / vapor extraction (VE) with the marine sediments of Mandol, Hajeon, Sangam and Busan, South Korea. Surface sediment of Mandol area had sand characteristics (average particle size, 1.789 ${\Phi}$), and sandy silt characteristics (average particle size, 5.503 ${\Phi}$), respectively. Sangam surface sediment had silt characteristics (average particle size, 5.835 ${\Phi}$). Sediment characteristics before experiment in the Busan area showed clay characteristics (average particle size, 8.528 ${\Phi}$). TPHs level in the B1 column of Mandol, Hajeon, Sangam, and Busan sediments were 2,459, 6,712, 4,348, and 14,279 ppm. B2 (3 L/min) to B5 (5 L/min) columns reduced 99.5% to 100.0% of TCE and 93.2% to 100.0% of PCE. Removal rates of TCE, PCE, and BTEX are closely correlated (0.90-0.99) with particle sizes and organic carbon concentrations. However, TPHs (0.76) and benzene (0.71) showed the poorer but moderate correlations with the same parameters.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.9
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• pp.536-542
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• 2018

Tin dioxide, $SnO_2$, is a well-known n-type semiconductor that shows change in resistance in the presence of gas molecules, such as $H_2$, CO, and $CO_2$. Considerable research has been done on $SnO_2$ semiconductors for gas sensor applications due to their noble property. The nanomaterials exhibit a high surface to volume ratio, which means it has an advantage in the sensing of gas molecules. In this study, SnO nanoplatelets were grown densely on Si substrates using a thermal CVD process. The SnO nanostructures grown by the vapor transport method were post annealed to a $SnO_2$ phase by thermal CVD in an oxygen atmosphere at $830^{\circ}C$ and $1030^{\circ}C$. The pressure of the furnace chamber was maintained at 4.2 Torr. The crystallographic properties of the post-annealed SnO nanostructures were investigated by Raman spectroscopy and XRD. The change in morphology was confirmed by scanning electron microscopy. As a result, the SnO nanostructures were transformed to a $SnO_2$ phase by a post-annealing process.