• Title/Summary/Keyword: $J_c$

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Inhibitory Effect of the Culture Broth of Cordyceps longissima and C. scarabaeicola on Nitric Oxide Production (제주긴뿌리동충하초와 풍뎅이동충하초 배양액의 Nitric Oxide 생성 저해)

  • Lee, Ki-Man;Lee, Geum-Seon;Shim, Hong;Nam, Sung-Hee;Kang, Tae-Jin
    • The Korean Journal of Mycology
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    • v.40 no.1
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    • pp.69-71
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    • 2012

  • During search for novel bioactive materials from natural resources with the potential as health food and alternative medicine, the culture broth of Cordyceps longissima (CL) J106, J144 and C. scarabaeicola (CS) J94, J123 were prepared, and their effect on cytotoxicity and nitric oxide (NO) production in RAW 264.7 cells were investigated. Whereas the culture broth of CL J144 and CS J123 had cytotoxicity in RAW 264.7 cells, that of CL J106 and CS J94 did not. The culture broth of CL J106 and CS J94 suppressed NO production in RAW 264.7 cells activated with lipopolysaccharide (LPS) at a dose-dependent manner. These results suggest that culture broth, a by-product of Cordyceps, may have active compounds with anti-inflammatory effect. In addition, it appears that their biological activity is dependent on the strains in spite of the same species.

  • https://doi.org/10.4489/KJM.2012.40.1.069 인용 PDF KSCI

Features and Properties of $YBa_2$$Cu_3$$O_{7-x}$ Films Grown on SrTi$O_3$ by High Frequency PLD

  • Shi, D.Q.;Ko, R.K.;Song, K.J.;Chung, J.K.;Choi, S.J.;Park, Y.M.;Shin, K.C.;Yoo, S.I.;Park, C.
    • Progress in Superconductivity
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    • v.5 no.1
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    • pp.75-79
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    • 2003

  • YBCO films were deposited with various thicknesses from 100nm to 1.6$\mu\textrm{m}$ on single crystal $SrTiO_3$ substrates by pulsed laser deposition (PLD). The effects of different deposition conditions, especially different deposition rates by means of changing the pulsed laser frequency up to 200Hz, on the J$_{c}$ value were studied. For YBCO film with the thickness of 200nm, the $J_{c}$ value of $2.1MA/\textrm{cm}^2$ has been achieved under the high deposition rate of 3.2nm/s (190nm/min). The $J_{c}$ can be maintained greater than $1M/\textrm{cm}^2$ with the thickness less than 1$\mu\textrm{m}$. The X-ray analysis was used to examine the texture, crystallization and surface quality. The SEM was employed to analyze the surface of YBCO, and it was shown the surface of YBCO film became rougher with increasing the thickness. There were many large singular outgrowths and networks of outgrowths on the surface of YBCO films which lowered the density of thick YBCO film. The outgrowth network was probably the a-axis YBCO corresponding to XRD $\theta$-2$\theta$scan and $\chi$-scan which were used to characterize a-axis orientation of YBCO film. The reason for J$_{c}$ declining with increasing the thickness was studied and discussed.sed.

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Microclimate of Greenhouses Covered with Functional Film (기능성 연질필름 온실의 미기상)

  • Chun, Hee;Choi, Young-Jun;Choi, Young-Ha;Kim, Hark-Joo;Lee, Si-Young;Jeong, Du-Seok;Shin, Yong-Seub;Choi, Chung-Don
    • Journal of Bio-Environment Control
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    • v.16 no.2
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    • pp.96-100
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    • 2007

  • There was no difference in total light transmissivity of covering materials. But the light transmittance of J-2 in greenhouse was by 78.25 which was higher than any other film. The high light transmittance of J-2 was come from low water condensation and dust attached in film surface. The ultraviolet light of J-3 was completely intercepted. The ultraviolet transmittance rate of others was from 62 to 76%. In no heating oriental melon cultivation, the air temperature in tunnel was 15 to $21^{\circ}C$ higher than outer, and the soil temperature in tunnel was 20 to $25^{\circ}C$ higher than outer. Air temperature and soil temperature of J-2 were higher than any other film.

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