• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.362-363
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• 1999

1995년 12월 환경부는 대기환경보전법 개정법 제28조 2항에 "휘발성 유기화합물의 규제"에 관한 규정을 신설하고 1999년 1월1일부터 시행한다고 명시한 바가 있다. 그리고 환경부는 1996년 9월과 1997년 7월에 악취민원이 빈번했던 전남 여천시 여천국가공업단지와 울산의 국가공업단지 지역을 특별대책으로 지정하여 이 두 지역에 대해서는 서둘러 VOC에 대한 규제를 시작하였다.(중략)

• Journal of the Korean Magnetic Resonance Society
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• v.11 no.2
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• pp.115-121
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• 2007

A new quantitative analysis of chloride by the HERETIC NMR method which does not need internal or external references was described. The results showed that the use of HERETIC peak corresponding $500\;{\mu}g/mL$ of chloride calibration showed less than 4 % standard deviations from 50 to $5000\;{\mu}g/mL$ range of chloride concentrations.

• Bulletin of the Korean Chemical Society
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• v.29 no.1
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• pp.47-50
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• 2008

The diastereoselectivity of Diels-Alder reactions were studied on the silica surface supported with different concentrations of cerium ion as efficient Lewis acid catalysts under solvent-free conditions. The results showed that the diastereoselectivity of reaction was highly improved in these conditions. The cerium ion was grafted on silica surface by using ion exchange method.

• Bulletin of the Korean Chemical Society
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• v.35 no.8
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• pp.2241-2242
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• 2014

• Transactions of the Korean Society of Automotive Engineers
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• v.7 no.5
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• pp.73-80
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• 1999

To decrease NOx and SOx using PPCP(Pulse-induced Plasma Chemical Process). This study is tried to obtain the relation and the basic data under the various conditions such the initial concentrations of NOx and SOx. The additional amount of hydrocarbon gases. The concentration of oxygen and input power etc. Especially, this study is focused on the effects of the additional hydrocarbon gases on the decrease of NOx and SOx.

• Proceedings of the Optical Society of Korea Conference
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• 1999.08a
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• pp.220-221
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• 1999

Single crystals of Yttrium Calcium Oxyborate (YCOB) doped with different concentrations of Er3+ and Yb3+ ions were growth by Czochralski method. High qualities of crystals in morphology and transparency were obtained . Analysis on crystal structure and lattice parameters were performed by X-ray diffraction method. It was found that congruent melting composition is YCA4.2O1.2(BO3)3. Absorption and fluorescence properties of grown crystals were also reported.

• Journal of the Korean Chemical Society
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• v.13 no.4
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• pp.249-261
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• 1969

Studies of photochemical reactions of the pure oxygen atmosphere are made using reaction rate constants and atmospheric data available in the latest literature. The daytime and nighttime variations in atomic oxygen and ozone are computed, based on three different conditions: 1) photochemical equilibrium, 2) direct integrations of the rate equations with modifications and approximation to the equations, and 3) by numerical integrations. The departure from the photochemical equilibrium concentrations during day and nighttime are discussed by comparing the results obtaind from the three conditions.

• Journal of the Korean Chemical Society
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• v.14 no.3
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• pp.237-242
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• 1970

Effect of Added 1-hexene on the yield of hydrogen produced from Co-60 gamma radiolysis of methanol was investigated at room temperature. The results indicated that the yield of hydrogen decreased rapidly with increasing 1-hexene concentrations. Effect of added methyl borate on the radiolysis of methanol was also studied in the presence of oxygen. The results revealved that methyl borate acted as a less effective scavenger than oxygen towards the precursors of the radiolysis products. Experimental data previously obtained on the systems with oxygen added were treated more quantitatively to re-examine mechanism of the radiolysis of methanol in detail.

• Bulletin of the Korean Chemical Society
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• v.25 no.6
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• pp.878-880
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• 2004

Revered-phase LC-electrospray ionization mass spectrometry was used to selectively determine enalapril from plasma with minimal sample preparation. Detection limit of the method was 1 ng/mL. Precision (within day and between days) and accuracy of the method at various concentrations were acceptable. The analytical technique was used for pharmacokinetic studies after administration of enalapril to human test subjects.

• Bulletin of the Korean Chemical Society
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• v.34 no.5
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• pp.1454-1456
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• 2013

The fluctuations in concentrations of reactants dominate the long-time dynamics of the single (A + A ${\rightarrow}$ 0) and two species (A + B ${\rightarrow}$ 0) diffusion-influenced annihilation reactions. Although hierarchical Smoluchowski approaches can provide a systematic and flexible framework to deal with the fluctuation effects, their results are too complicated to be analytically solved. For the efficient numerical calculation of the complicated fluctuation effect terms, we show that the presented point particle approximation is not only practical but also quite accurate for most conditions in diffusion-influenced reaction systems.