• 제목/요약/키워드: laboratories

검색결과 2,742건 처리시간 0.033초

Physicochemical Evaluation of Oil in Water Microemulsions (수중유형 마이크로에멀젼의 물리화학적 평가)

  • Chung, Myung-Hwa;Jheong, Yeoub;Jheong, Dae-Sik;Kwon, Jong-Won;Yang, Joong-Ik;Min, Shin-Hong
    • Journal of Pharmaceutical Investigation
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    • 제18권1호
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    • pp.9-13
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    • 1988
  • Physicochemical properties of oil in water microemulsions containing soybean oil and egg phosphatide were observed for 3 weeks under the storage condition of $4^{\circ}C$ refrigerator. Changes in major fatty acid content, particle size distribution, rheogram, acid value and pH value were measured by gas chromatograph, laser particle sizer, Coulter counter and rheometer. From above experiments following conclusions were obtained; 1) Mean particle diameter was shifted from 240 to 266mm. 2) No significant changes were observed in the content of major fatty acids of soybean oil, rheogram, acid value and pH value.

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The illumination system design of Integrated Screen 3D Display

  • Lin, Chu-Hsun;Lin, Chun-Chuan;Lo, Hsin-Hsiang;Chung, Shuang-Chao;Chen, Tian-Yuan;Wang, Chy-Lin
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.1379-1382
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    • 2009
  • The 3D display has been used in optical projection technology to connect twenty mini- projectors with seamless image tiling. In this way, we can improve the projected resolution by reducing each project screen and increase projected area by connect several mini-projectors. In this article, the illumination system uses the LED light source, non- telecentric structure and LCOS panel, and it's total length is less than 10 centimeter. It can build a seamless large display by tiling multiple projectors.

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Comparison of CYP 3A4 metabolism between DA-8159 and Sildenafil in vitro and in vivo

  • Park, Kyung-Jin;Youn, Hae-Sun;Shim, Hyun-Joo;Kim, Soon-Hoe;Yoo, Moo-Hi;Kim, Won-Bae
    • Proceedings of the PSK Conference
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    • 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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    • pp.253.1-253.1
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    • 2002
  • DA-8159 is a new PDEV inhibitor, synthesized by Dong-A Pharm, as an oral agent to treat male erectile dysfunction. DA-8159 and sildenafil are mainly metabolized by cytochrome P450 enzyme CYP 3A4. In this study. we compared the metabolism of DA-8159 with sildenafil in vitro and in vivo. First, we quantified the remaining gatio of original compound, DA-8159 and sidenafil., after we incubated drugs for 30 minutes with human liver microsome cytochrome P 450 3A4. (omitted)

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RF Dosimetry for Mobile Telephone Handsets

  • Balano, Q.;Chou, C.K.;Joyner, K.
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 한국전자파학회 1999년도 제3회 전자장의 생체영향에 관한 워크숍
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    • pp.3-8
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    • 1999
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Summary of 2014 JCOMM Pilot Inter-Comparison Project for Seawater Salinity Measurements (2014년 JCOMM 해수 염분 측정 국제 상호비교실험 결과 보고)

  • Lee, Jung-Han;Kim, Eun-Soo;Lee, Yong-Kuk
    • Ocean and Polar Research
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    • 제38권3호
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    • pp.247-257
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    • 2016
  • The inter-comparison project for seawater salinity measurements, in which 25 laboratories from 16 countries took part, was conducted by JCOMM (Joint WMO/IOC Technical Commission for Oceanography and Marine Meteorology) for the first time in 2014. Two seawater samples of different salinity values ranging from 30-35 and 20-25 for Sample A and Sample B respectively and which had sufficient homogeneity and stability were distributed to all participants. Participants measured the salinity in their own laboratories at least 3 times and reported the results. Statistical treatments were applied to the results to assess discrepancies among laboratories. 20 out of the 25 laboratories used laboratory salinometers and statistics for this group were denoted as belonging to group ${\alpha}$; while 5 out of the 25 laboratories used hand-held measuring instruments and statistics for this group were denoted as belonging to group ${\beta}$. Bias described as discrepancy among laboratories in group ${\alpha}$ was within ${\pm}0.001$ and expanded uncertainty (k = 2) was in the vicinity of 0.002. The bias and the uncertainty of Korea Institute of Ocean Science and Technology (KIOST), in group ${\alpha}$, were 0.000 and 0.002, respectively. The biases of group ${\beta}$ were greater than group ${\alpha}$ because of constraints related to instrument accuracy. Biases from 3 laboratories in group ${\beta}$ exceed the accuracy specification of the corresponding instruments. Considering that the uncertainty of Standard Seawater (SSW) is of the order 0.001 to 0.002, the inter-comparison results show that 16 laboratories among the 25 laboratories made high quality measurements, largely indistinguishable from one another.