• 제목/요약/키워드: Basic Science

검색결과 15,685건 처리시간 0.047초

Cool-down test of HWR cryomodule for RAON

  • Kim, Y.;Lee, M.;Jo, Y.W.;Choi, J.W.;Kim, H.;Kim, W.K.;Kim, H.J.
    • 한국초전도ㆍ저온공학회논문지
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    • 제17권4호
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    • pp.43-46
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    • 2015
  • The heavy ion accelerator that will be built in Daejeon utilizes four types of superconducting cavities. Cryomodules holding the superconducting cavities in them supply thermal insulation for cavities operating in 4.3 K or 2.1 K. A Prototype of cryomodule which holds two HWR (Half Wave Resonator) cavities was fabricated and tested. Since the operating temperature of the HWR is 2.1 K, the superfluid helium was generated with warm vacuum pumping system. The cyromodule was successfully cooled down below lambda point temperature of helium and any detectable leak was not observed during the test. The static thermal load at 4.2 K was measured. The result and the experience for the cool-down below lambda point of helium are reported in this paper.

$^{19}F$ MR Imaging of 5-FU Metabolism in Mice

  • Chaejoon Cheong;Lee, Seung-C.;Jae-G. Seo;Kim, Sung W.;Lee, Chulhyun;Kim, Chul S.;Taegyun Yang
    • 한국자기공명학회논문지
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    • 제5권2호
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    • pp.110-117
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    • 2001
  • $^{19}$ F imaging of mice was carried out. For $^{19}$ F imaging, 5-flouro-uracil (5-FU) was injected into a mouse and in vivo detection of the catabolism of 5-FU to a-fluoro-P-alanine (FBAL) was carried out. The chemical shift selective (CHESS) imaging technique was employed. The 19F spectra and images give temporal and spatial information of the metabolism for 5-FU in mice.

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Cytotoxic Terpenoids from the Sponge Sarcotragus Species

  • Liu, Yong-Hong;Hong, Jong-Ki;Lee, Chong-O;Im, Kwang-Sik;Kim, Nam-Deuk;Park, Jae-Sue;Jung, Jee-Hyung
    • 대한약학회:학술대회논문집
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    • 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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    • pp.101.2-102
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    • 2002
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Furanosesterterpene and Lipids From Sarcotragus Sponge

  • Liu, Yong-Hong;Hong, Jong-Ki;Lee, Chong-O;Im, Kwnag-Sik;Kim, Nam-Deuk;Choi, Jae-Sue;Jung, Jee-Hyung
    • 대한약학회:학술대회논문집
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    • 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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    • pp.200.1-200.1
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    • 2002
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