• 제목/요약/키워드: applied research

검색결과 38,575건 처리시간 0.061초

Studies on the Lipid Classes of Nicotiana tabacum L. Seed Oil

  • Waheed, Amran;Mahmud, Shahid;Javed, Muhammad Akhtar;Saleem, Muhammad
    • Natural Product Sciences
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    • 제7권4호
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    • pp.110-113
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    • 2001

  • The lipid classes constituents; hydrocarbons, wax esters, sterol esters, triacylglycerols, free fatty acids, 1,3-diacylglycerols, 1,2-diacylglycerols, free sterols, 2-monoacylglycerols, 1-monoacylglycerols, phosphatidylethanolamines, phosphatidylcholines, lysophosphatidylethanolamines and phosphatidylinositols of Nicotiana tabacum L. seeds oil were investigated by thin layer and gas chromatography. Palmitic, oleic and linoleic acids were the major components in all lipid classes studied.

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PLD 법에 의한 YBCO 박막의 증착 조건에 따른 특성 (Study on deposition conditions of YBGO films grown by pulsed laser deposition)

  • 최수정;정준기;박유미;고락길;송규정;박찬;유상임
    • 한국초전도저온공학회:학술대회논문집
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    • 한국초전도저온공학회 2003년도 학술대회 논문집
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    • pp.109-112
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    • 2003

  • The high temperature superconducting YBCO films were deposited on the SrTiO$_3$(100) single crystals to find out the proper deposition conditions of YBCO on biaxially-textured metal substrates. Different sets of the substrate temperature, oxygen partial pressure and laser fluence were used to investigate the effect of deposition conditions on the superconducting properties. The new apparatuses for measuring critical temperature (Tc) and critical current (Ic) were designed and manufactured, which were used to obtain Tc's and Ic's of the deposited films. The accuracy of the new apparatus was confirmed by comparing the results with those from SQUID magnetometer. The results on the YBCO films deposited on single crystal substrates which will be used to get the optimum deposition conditions of YBCO films in the coated conductor, are summarized in this report.

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Swelling Behavior and Mechanical Strength of Crosslinked Dextran Hydrogel

  • Kim, Byung-Hoon;Kim, Do-Man;Jung, Yong-Sik;Kim, Hoon;Cho, Dong-Lyun
    • Macromolecular Research
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    • 제11권4호
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    • pp.291-295
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    • 2003

  • Dextran as a candidate material for colon-specific drug delivery has been studied. Crosslinked dextran hydrogels were prepared by mixing dextran, $MgCl_2$, glutaraldehyde (GA) and polyethyleneglycol (PEG 400) in water. The dextran hydrogels were characterized by measuring equilibrium swelling ratios and mechanical strengths. Response surface methodology (Central Composite Design) was used to evaluate the swelling behaviors and mechanical strengths as functions of concentrations of $MgCl_2$, GA, and PEG 400, which was found to be useful for the evaluation. It showed that the swelling behavior and mechanical strengths were influenced significantly by PEG 400 and $MgCl_2$ concentrations.

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