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Systematic Propagation of High Quality Garlic (Allium sativum L.) Through Shoot Apical Meristem Culture III. Micropropagation by Involucre Culture (생장점배양에 의한 우량 마늘의 체계적 증식 III. 총포배양에 의한 무병주 대량증식)

  • Lee, Eun-Mo;Lee, Young-Bok
    • Korean Journal of Plant Tissue Culture
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    • v.21 no.5
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    • pp.277-280
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    • 1994

  • This study was conducted to obtain some basic information needed for the propagational system of high quality garlic trough the culture of healthy tissues. non shoot-tips of bulbil obtained in mid May were cultured on MS medium containing 8% sucrose supplemented with 0.1 mg/L NAA, in vitro bulbli were formed, but the shoots were formed at the early to middle in June. Multiple shoots were induced by the culture of receptacles on MS medium supplemented with 0.1 mg/L NAA and 10mg/L BA..Among the flower bud, bulbil and receptacle, receptacle showed most suitable in terms of shoot formation efficiency, More than 50 shoots per single involucre were produced under the optimum condition. Results indicate that in vitro culture of involucre has a high potential for the micropropagation of high quality seed bulbs.

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SPECIAL ORTHONORMAL BASIS FOR L2 FUNCTIONS ON THE UNIT CIRCLE

  • Chung, Young-Bok
    • Bulletin of the Korean Mathematical Society
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    • v.54 no.6
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    • pp.2013-2027
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    • 2017

  • We compute explicitly the matrices represented by Toeplitz operators on the Hardy space over the unit circle with respect to a special orthonormal basis constructed by author in terms of their symbols. And we also find a necessary condition for the matrix generated by the product of two Toeplitz operators with respect to the basis to be a Toeplitz matrix by a direct calculation and we finally solve commuting problems of two Toeplitz operators in terms of symbols. This is a generalization of the classical results obtained regarding to the orthonormal basis consisting of the monomials.

  • https://doi.org/10.4134/BKMS.b160697 인용 PDF KSCI

Studies on the Constituents of Impatiens noli-tangere L. (노랑물봉선의 성분에 관한 연구)

  • Choi, Bok-Ja;Kim, Chong-Won
    • Korean Journal of Pharmacognosy
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    • v.33 no.4 s.131
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    • pp.263-266
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    • 2002

  • From the herbs of this plant, six compounds were isolated and their structures were characterized as dieicosyl ether (1), scopoletin (2), ${\alpha}-spinasterol-3-O-{\beta}-D-glucopyranoside$ (3), kaempferol (4), quercetin (5), and quercetin 7, 3', 4'-trimethylether-3-O-rutinoside (6) by chemical and spectroscopic evidences. These compounds were isolated for the first time from this plant and compound 6 was first isolated from nature.

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A NOTE ON SIMPLE SINGULAR GP-INJECTIVE MODULES

  • Nam, Sang Bok
    • Korean Journal of Mathematics
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    • v.7 no.2
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    • pp.215-218
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    • 1999

  • We investigate characterizations of rings whose simple singular right R-modules are GP-injective. It is proved that if R is a semiprime ring whose simple singular right R-modules are GP-injective, then the center $Z(R)$ of R is a von Neumann regular ring. We consider the condition ($^*$): R satisfies $l(a){\subseteq}r(a)$ for any $a{\in}R$. Also it is shown that if R satisfies ($^*$) and every simple singular right R-module is GP-injective, then R is a reduced weakly regular ring.

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