• Proceedings of the Korean Radioactive Waste Society Conference
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• 2007.05a
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• pp.196-197
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• 2007

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2009.06a
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• pp.275-276
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• 2009

• Proceedings of the Safety Management and Science Conference
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• 2007.04a
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• pp.323-333
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• 2007

This paper presents contents of certificates, and use for reference materials. This study also introduces general requirements for the competence of reference material producers. Lastly this paper shows general and statistical principles for certification of reference materials.

• Analytical Science and Technology
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• v.26 no.1
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• pp.80-85
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• 2013

The sixty nine accident preparedness substances (APS) having high probability of chemical accident are controlled under the Toxic Chemicals Control Act (TCCA). Around the world, there has been a growing interest in the analysis of chemical warfare agent (CWAs). When a chemical accident occurs, it is generally required to detect and identify APS. However, the quantitative analytical data remain limited in Korea. In this study, an analytical method using GC/MS for volatile organic chemicals was established and a quantitative analysis method was studied. The calibration curve for 25 chemicals were obtained and 21 chemicals showed higher coefficient of determination ($r^2$ >0.998).

• Analytical Science and Technology
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• v.26 no.1
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• pp.91-98
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• 2013

Interested in NOA (Naturally Occurring Asbestos), Korea as well as the USA has been making geologic maps of asbestos distributed mines and surrounding areas, restoring mines, evaluating hazard, and so on. The result can be used to improve the reliability of analysts and analysis institutions by judging the amount of asbestos and set up PLM(Polarizing Light Microscope) information by analyzing in soil. The certification value of 2 kinds of CRM(Certified Reference Material) was performed by counting total 400 points with EPA 600-R-93-116 method using by PLM. The following is the result of homogeneity and stability of 2 kinds of manufactured CRM analyzed by ANOVA (Analysis of variance) and Regression Analysis. Based on the analyzation, the results are satisfied with homogeneity and long-term stability. The analyzed certification value of CRM includes the range of minimum and maximum value of point counting result for chrysotile; low concentration-1% (range, 0.25~3.00), high concentration-4% (range, 2.25~5.50).

• Korean Journal of Medicinal Crop Science
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• v.12 no.1
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• pp.24-30
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• 2004

The immune activities of Ganoderma lucidum Mycelium added garlic extracts (GAM), Ganoderma lucidum Mycelium (GM), garlic extracts (GS) and standard $({\beta}-glucan)$ were compared. GAM enhanced the growth of human immune T cell up to $1.25{\sim}1.46$ times, compared to control group. GAM showed relatively lower cytotoxicity in using normal human lung cell, while GAM showed the most potent inhibitory effect on the human lung carcinoma, compared to GM and GS. The selectivity of GAM was also higher than that of GM and GS. GAM increased the secretion of cytokines, IL-6 and TNF- from human B cell as well as the growth of human immune cells. It can imply that GAM has higher immune activity than GM or GS.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.37 no.4
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• pp.377-382
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• 1992

This study was conducted to obtain basic informations on the lignan components from sesame seed. Two major lignans, sesamin and sesamolin, were isolated and identified by means of spectral methods, and quantitative analysis was by HPLC from sesame variety Danbaeggae. Separation was achieved by isocratic elution and reversed phase chromatography Develosil ODS column. The content of the major lignan components were about 0.42% and 0.30% for sesamin and sesamolin, respectively.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2005.05a
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• pp.183-185
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• 2005

영산강 유역 생활하수처리장의 방류수의 분석 결과, 일일 처리량이 타지점들에 비해 다량이며 인구수가 많고 산업이 발달되어 있는 광주지역에 위치해 있는 광주 하수처리장과 송대 하수처리장에서 다종의 유기화합물이 검출되었다. 특히 polycyclic compounds, phenols, phthalates, pesticides는 여름철에 다종 고농도로 검출되어 여름철 영산강 유역 방류수의 주 오염물질로 판단된다. 이들 광주 하수처리장 방류수와 송대 하수처리장 방류수에서는 내분비계 장애물질인 diethylph thalate와 bis(2-ethyhexyl)phthalate가 4회 이상 검출되었다. 또한 송대, 장성 하수처리장에서 고농도로 검출된 물질이 대부분 산업용 화학물질이나 반응에 의해 2차로 생성되는 화학물질들이 다종으로 검출되었다. 따라서 이들 지점의 영향은 산업폐수에 의한 것으로 판단된다. 현재 각 하수처리장에서 실시하는 표준활성오니법, 회전원판접촉식 처리공정으로는 본 연구에서 검출된 물질과 같이 생태계나 인간의 건강에 유해한 유기화합물을 처리하기에는 역부족이라고 판단된다. 따라서 영산강 유역 수질 안정성을 확보하기 위해서는 polycycli compounds, phenols, phthalates, pesticides와 같은 난분해성 유기 화합물질을 처리할 수 있는 고도산화처리 시스템 도입이 필요하다.

• Journal of the Korean Society for Marine Environment & Energy
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• v.14 no.3
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• pp.163-175
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• 2011

Though polycyclic aromatic hydrocarbon compounds (PAHs) in marine sediment has been produced by many colleges and institution in Korea, it is difficult to compare PAHs data in a study area with those in other areas due to the lack of confidence for the quality of data from the other organization. Therefore, we suggested the protocol for PAHs analysis in marine sediment through examining the method of PAHs analysis described in over twenty scientific papers and reports. When a known amount of 23 PAHs were spiked into a sediment and anlyzed following this new protocol, very good recoveries were obtained. In addition, for college and institution with their own method to analyze PAHs can keep producing PAHs data without exchanging to this new PAHs protocol, the method to get a full confidence through the QA/QC for the PAHs data produced by these organization is included to the protocol.

• Applied Chemistry for Engineering
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• v.17 no.5
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• pp.509-516
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• 2006

The solid-liquid mass transfer coefficients $k_L$ in a gas-liquid-solid three phases agitated vessel were measured with conventional impellers (e.g. Rushton turbine, paddle, and propeller). For the conventional impellers the rotational speed for the complete suspension $N_{js}$ changes with the impeller height and gas flow rate. Mass transfer coefficient of the Rushton turbin impeller, for which the particle suspension was independent of the aeration, is correlated only with Pgv. Mass transfer coefficients $k_L$ for the Rushton turbine, paddle and propeller impellers were affected by the impeller position.