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Pathogenicity of Salmonella typhimurium and S enteritidis isolated from domestic animals in Gyeongbuk province (경북지역 가축에서 분리된 Salmonella typhimurium과 S enteritidis의 병원성 시험)

  • Kim, Sang-Yun;Lee, Hee-Moo;Kim, Sin;Hong, Hyon-Pyo;Kwon, Heon-Il
    • Korean Journal of Veterinary Service
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    • v.24 no.1
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    • pp.69-82
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    • 2001

  • The result of studying the pathogenicity of Salmonella typhimurium and S enteritidis isolated from domestic animals in Gyeongbuk province were summarized as follows. In Congo-red binding test, S typhimurium had much more rough types than S enteritidis. In colicin production test, 4 strains of S typhimurium were positive but all of S enteritidis were negative. In hemolysin production test, all of S typhimurium and S enteritidis were negative. In Guinea pig serum resistant test, all of S typhimurium and S enteritidis were positive. As a result of pathogenicity test to mice, 54.4% of mice were died. Therefore, S typhimurium and S enteritidis were considered as highly pathogenic. S typhimurium DT104 and S enteritidis PT4 were more pathogenic to mice than other phage types of same serovar. S typhimurium and S enteritidis were considered not so pathogenic for 6-day-old chickens. The recovery rates of Salmonella stains from mice and chickens inoculated were 96.8%, and 54%, respectively. In chickens, proportional to the time from 2 weeks after challenge inoculation, the recovery rates were noticeably decreased.

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The Study on Properties of Surface Degradation of Silicone Rubber for Outdoor Use (옥외용 실리콘 고무의 표면 열화 특성 연구)

  • Seo, K.S.;Kim, J.H.;Song, W.C.;Moon, J.S.;Park, Y.K.;You, Y.S.
    • Proceedings of the KIEE Conference
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    • 1999.07e
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    • pp.2302-2304
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    • 1999

  • The application of polymeric insulators for outdoor use has been increasing as a new replacement of overhead line in abroad. In domestic case, it is actively going on the research of polymeric insulators. The Silicone rubber among polymeric insulators have a good electrical properties, due to surface hydrophobicity. This paper is concentrated on the recovery of surface hydrophobicity and the change of surface construction after electrical stress. The feature of silicone rubber, a good hydrophobicity, is demanded the improvement method as the estimation of the non-ceramic insulators like it.

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NONLINEAR MIXED *-JORDAN TYPE n-DERIVATIONS ON *-ALGEBRAS

  • Raof Ahmad Bhat;Abbas Hussain Shikeh;Mohammad Aslam Siddeeque
    • Communications of the Korean Mathematical Society
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    • v.39 no.2
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    • pp.331-343
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    • 2024

  • Let ℜ be a *-algebra with unity I and a nontrivial projection P1. In this paper, we show that under certain restrictions if a map ψ : ℜ → ℜ satisfies $$\Psi(S_1{\diamond}S_2{\cdot}{\cdot}{\cdot}{\diamond}S_{n-1}{\bullet}S_n)=\sum_{k=1}^nS_1{\diamond}S_2{\diamond}{\cdot}{\cdot}{\cdot}{\diamond}S_{k-1}{\diamond}{\Psi}(S_k){\diamond}S_{k+1}{\diamond}{\cdot}{\cdot}{\cdot}{\diamond}S_{n-1}{\bullet}S_n$$ for all Sn-2, Sn-1, Sn ∈ ℜ and Si = I for all i ∈ {1, 2, . . . , n - 3}, where n ≥ 3, then ψ is an additive *-derivation.

  • https://doi.org/10.4134/CKMS.c230213 인용 PDF

ON THE TAYLOR-BOWDER SPECTRUM

  • Jeon, In-Ho;Lee, Woo-Young
    • Communications of the Korean Mathematical Society
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    • v.11 no.4
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    • pp.997-1002
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    • 1996

  • In this paper we extend the Zemanek's characterization of the Browder spectrum for a commuting n-tuple operators in $L(H)$ and show that if $T = (T_1, \cdots, T_n)$ is Browder then there exists an n-tuple $K = (K_1, \cdots, K_n)$ of compact operators and an invertible commuting n-tuple $(S_1, \cdots, S_n)$ for which $T = S + K$ and $S_i K_j = K_j S_i$ for all $1 \leq i, j \leq n$.

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