• Title/Summary/Keyword: Chung-ryu

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In vitro neural differentiation of human embryonic stem cells

  • Park, Jae-Hyun;Shin, Hwa-Yean;Kang, Yun-Hee;Kang, Young-Kook;Lee, Jung-Bok;Yoon, Hyun-Soo;Ryu, Chun-Jeih;Myung, Pyung-Keun;Hong, Hyo-Jeong
    • Proceedings of the PSK Conference
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    • 2003.10b
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    • pp.164.2-164.2
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    • 2003
  • Human embryonic stem (ES) cell lines derived from the inner cell mass of human blastocysts have potential to differentiate into any cell types. We have established in vitro neural differentiation of human ES cells. After the formation of embroid bodies (EBs), the differentiating EBs formed neural tube-like rosettes in the presence of basic fibroblast growth factor (bFGF). The rosettes were selectively isolated by the treatment of dispase and cultured in a medium for human neural precursors in the presence of bFGF. (omitted)

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Artificial Cultivation of Phellinus linteus (Phellinus linteus의 인공재배)

  • Song, Chi-Hyun;Moon, Hye-Yeon;Ryu, Chung-Hyun
    • The Korean Journal of Mycology
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    • v.25 no.2 s.81
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    • pp.130-132
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    • 1997
  • Artificial cultivation of Phellinus linteus was studied. The best yield (B.E. $9.4{\pm}1.6$) of basidiocarps including basidiospore was obtained using Quercus acutissima among the logs of Morus alba, Quercus acutissima, Alnus japonica, Castanea crenata. Optimum temperature and required periods for the basidiocarps formation were $25^{\circ}C$ and about 10 months, respectively.

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ON CONVERGENCES FOR ARRAYS OF ROWWISE PAIRWISE NEGATIVELY QUADRANT DEPENDENT RANDOM VARIABLES

  • Ryu, Dae-Hee;Ryu, Sang-Ryul
    • Journal of applied mathematics & informatics
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    • v.30 no.1_2
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    • pp.327-336
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    • 2012
  • Let {$X_{ni}$, $i{\geq}1$, $n{\geq}1$} be an array of rowwise and pairwise negatively quadrant dependent random variables with mean zero, {$a_{ni}$, $i{\geq}1$, $n{\geq}1$} an array of weights and {$b_n$, $n{\geq}1$} an increasing sequence of positive integers. In this paper we consider some results concerning complete convergence of ${\sum}_{i=1}^{bn}a_{ni}X_{ni}$.

Antibacterial and Antifungal Activities of 1,4-Naphthoquinone Derivatives (1,4-나프토퀴논 유도체의 항균 및 항진균 작용)

  • Ryu, Chung-Kyu;Ryu, Jae-Chun;Chung, Sae-Young;Kim, Dong-Hyun
    • YAKHAK HOEJI
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    • v.36 no.2
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    • pp.110-114
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    • 1992
  • In order to evaluate the antimicrobial effect of 2, 3-substituted-1, 4-naphthoquinone derivatives, we newly synthesized several 2-chloro, 2-bromo and 2-hydroxy-1, 4-naphthoquinones and subjected to antibacterial and antifungal activities, in vitro, against Escherichia coli NIHJ, Staphylococcus aureus ATCC6538p, Candida albicans 10231, Aspergillus niger 1231 and Tricophyton mentagrophytes 6085. Among these derivatives 3, 9, 18 and 23 showed the potent antibacterial activities. 18, 23 and 28 have the antifungal activities. However, these compounds have no significant hemolytic activity at concentrations higher than that required for showing the antibacterial and antifungal activities.

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