• Title/Summary/Keyword: $S_{y}$

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Chromosome Studies on Several Wild Sepcies of Drosophilidae (야생 초파리 수종의 염색체에 관한 연구)

  • 강영선;김영진;방규환
    • The Korean Journal of Zoology
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    • v.7 no.2
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    • pp.13-18
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    • 1964

  • The chromosomes of thirteen wild forms of Drosophila obtained from Kwangnung in Kyunggi Province, Korea were investigated with the ganglion cells of both male and female larvae using the aceto-lactic orcein squashed method. The male chromosome patterns of the species observed in the present study are summarized as follows:

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A Study on the Dielectric, Electrical Properties of the PZN-BT-PT Ceramics (Y2O3가 첨가된 PZN-BT-PT 세라믹의 유전 및 전기적 특성에 관한 연구)

  • 유주현;이두희;홍재일;강원구;박창엽
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.41 no.3
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    • pp.253-260
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    • 1992

  • In this study, the dielectric, structural and electrical properties of Pb(ZnS11/3TNbS12/3T)OS13T-BaTiOS13T-PbTiOS13T system ceramics were investigated with respect to the variation of YS12TOS13T addition amount. As the YS12TOS13T addition amount is increased, the resistivity at 100$^{\circ}C$ and the resonant/antiresonant frequencies and the frequency constant are slowly increased, and the grain growth is restrained until 0.4 wt% YS12TOS13T addition amount but continuously increased with the addition amount more than 0.4 wt% YS12TOS13T. As the YS12TOS13T addition amount is increased, the density, the diffuseness of dielectric constant and the induced polarization are increased until 0.4 wt% YS12TOS13T addition.

Classification and Identification of Streptomyces Isolated from Soil of Middle Part of Korea (한국(韓國) 중부(中部) 지방(地方)의 토양(土壤)에 분포되는 Streptomyces의 분류(分類))

  • Yun, Bong Sik;Shin, Gwan Chull;Choi, Jae Eul
    • Korean Journal of Agricultural Science
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    • v.16 no.1
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    • pp.44-55
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    • 1989

  • Out of 826 isolates of Streptomyces isolated from different soils, 65 isolates were selected and identified according to their morphological and physiological characters. A total of 46 species of Streptomyces were identified, and the following 38 species were newly recorded in Korea. 1) Melanoid pigments producing group; S. lavendulae, S. purpurascens, S. violarus, S. lateritius, S. olivochromogenes, S. purpeofuscus, S. fulvoviolaceus, S. gallilaeus, S. naganishii, S. hygroscopicus subsp. ossamyceticus, S. nevagawaensis, S. anandii, S. phaeopurpureus, S. mirabilis, S. arenae, S. massasporeus, S. eurythermus, S. tuirus. 2) Melanoid pigments non-producing group; S. fellus, S. flavidovirens, S. exfoliatus, S. fumanus, S. termitum, S. glomeroaurantiacus, S. luteofluorescens, S. prunicolor, S. fradiae, S. tauricus, S. griseolus, S. misakiensis, S. poonensis, S. antimycoticus, S. diastaticus subsp. ardesiacus, S. nigrifaciens, S. tendae, S. narbonensis subsp. josamvceticus, S. atroolivaceus, S. chrysomallus subsp. fumigatus.

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ON LOCAL SPECTRAL PROPERTIES OF RIESZ OPERATORS

  • JONG-KWANG YOO
    • Journal of applied mathematics & informatics
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    • v.41 no.2
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    • pp.273-286
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    • 2023

  • In this paper we show that if T ∈ L(X) and S ∈ L(X) is a Riesz operator commuting with T and XS(F) ∈ Lat(S), where F = {0} or F ⊆ ℂ ⧵ {0} is closed then T|XS(F) and T|XT(F) + S|XS(F) share the local spectral properties such as SVEP, Dunford's property (C), Bishop's property (𝛽), decomopsition property (𝛿) and decomposability. As a corollary, if T ∈ L(X) and Q ∈ L(X) is a quasinilpotent operator commuting with T then T is Riesz if and only if T + Q is Riesz. We also study some spectral properties of Riesz operators acting on Banach spaces. We show that if T, S ∈ L(X) such that TS = ST, and Y ∈ Lat(S) is a hyperinvarinat subspace of X for which 𝜎(S|Y ) = {0} then 𝜎*(T|Y + S|Y ) = 𝜎*(T|Y ) for 𝜎* ∈ {𝜎, 𝜎loc, 𝜎sur, 𝜎ap}. Finally, we show that if T ∈ L(X) and S ∈ L(Y ) on the Banach spaces X and Y and T is similar to S then T is Riesz if and only if S is Riesz.

  • https://doi.org/10.14317/jami.2023.273 인용 PDF

Studies on the Isolation and Identification of Genus Strptomyces (Streptomyces속의 분리 및 동정에 관한 연구)

  • 이민재;하영칠;안정선
    • Korean Journal of Microbiology
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    • v.14 no.1
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    • pp.25-35
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    • 1976

  • A taxonomical sutdy was made on the Streptomyces species isolated from soils in this country, most of which were collected during the period from April, 1974 to July 1975. J.S.P. Methods (1966), I.S.P. Descriptions (1968-1972) and Bergy's Manual of Determinative Bacteriology (1974) were used for most of the experimental methods and identifications. As a result, 24 species were identified as follows ; S. albolongus, S galticri.S. Nashvillensis. S. showdoensis. S.norbonensis. S. flacocirens. S. resistomycificus. S> reshiriensis. S. chromofuscus. S. parvullus. S, chibaensis. S.canus. S. albulus. S. amlachiticus. S.griseoflavus. S. griscoincarnotus. .S. rubiginosus. S. bacillaris. S. setonill. S.intermedius. S. griseinus. S.subrutilus. S.reseosporus.

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MORITA EQUIVALENCE FOR HOMOGENEOUS C*-ALGEBRAS OVER LOWER DIMENSIONAL SPHERES

  • Park, Chun-Gil
    • Journal of the Chungcheong Mathematical Society
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    • v.19 no.2
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    • pp.111-121
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    • 2006

  • All d-homogeneous $C^*$-algebras $T^d$ over $\prod^{s_4}S^4{\times}\prod^{s_2}S^2{\times}\prod^{s_3}S^3{\times}\prod^{s_1}S^1$ are constructed. It is shown that $T^d$ are strongly Morita equivalent to $C(\prod^{s_4}S^4{\times}\prod^{s_2}S^2{\times}\prod^{s_3}S^3{\times}\prod^{s_1}S^1)$.

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