• 제목/요약/키워드: host

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한국산 미기록 백섭병균류에 관한 연구 (Unrecorded causal organisms of Korean Powdery)

  • 이호준;이배함
    • 미생물학회지
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    • 제5권1호
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    • pp.24-33
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    • 1967
  • Fifty-two specimens of the infected plants were collected from areas through the country during the year of 1965. We report here 14 unrecorded specoes which were identified in this work. The results are as follows: 1. Erysiphe cichoracearum DC. (Host: Artemisia princeps PAMPAN. var. orien-talls HARA.) 2. Erysiphe cichoracearum DC. (Host: Plantago sp.) 3. Erysiphe cichoracearum DC. (Host: Sonchus oleraceus L.) 4. Erysiphe pisi DE CANDOLLE. (Host: Lespedeza sp.) 5. Erysiphe polygoni DE CANDOLLE. (Host: Clematis patens MORR et DECAIS.) 6. Microsphaera alphitoides GRIFFITHS et MAUBLANCE (Uncinula bifurcata GERARD.) (Host: Quercus serrate GERARD) 7. Microsphaera baumleri MAGNUS. (Host: Robinia pseud-acacia L.) 8. Microsphaera coryli HOMMA. (Host: Corylus heterophylla FISCH. var. japonica KOIDZUMI) 9. Podosphaera tridactyla (WALLROTH) DE BARY. (Host: Prunus leveilleana KOEHN. var. typica NAKAI) 10. Sphaerotheca fuliginea (SCHLECHTENDAHL) POLLACI. (Host: Impatiens balsamina L.) 11. Sphaerotheca fuliginea (SCHLECHTENDAHL) POLLACI. (Host: Zinnia elegans JACQ) 12. Uncinula aceris SACCARDO (Host: Acer negundo L.) 13. Uncinula fraxini MIYABE(U. salmon SYDOW) (Host: Fraxinus rhynchophyllus HANCE.) 14. Uncinula salicis (DE CANDOLLE) WINTER. (Host: Salix gracilistyla MIQ.)

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Host and Non-Host Disease Resistances of Kimchi Cabbage Against Different Xanthomonas campestris Pathovars

  • Lee, Young-Hee;Hong, Jeum-Kyu
    • The Plant Pathology Journal
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    • 제28권3호
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    • pp.322-329
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    • 2012
  • This study was conducted to investigate host and non-host disease resistances of kimchi cabbage plants to bacterial infection. Kimchi cabbage leaves responded differently to infections with a virulent strain of Xanthomonas campestris pv. campestris (Xcc) 8004 and two strains (85-10 and Bv5-4a.1) of non-host bacteria X. campestris pv. vesicatoria (Xcv). Non-host bacteria triggered a rapid tissue collapse of the leaves showing as brown coloration at the infected sites, highly increased ion leakage, lipid peroxidation and accumulation of UV-stimulated autofluorescence materials at the inoculated sites. During the observed interactions, bacterial proliferations within the leaf tissues were significantly different. Bacterial number of Xcc 8004 progressively increased within the inoculated leaf tissues over time, while growths of two non-host bacteria Xcv strains were distinctly limited. Expressions of pathogenesis-related genes, such as GST1, PR1, BGL2, VSP2, PR4 and LOX2, were differentially induced by host and non-host bacterial infections of X. campestris pathovars. These results indicated that rapid host cellular responses to the non-host bacterial infections may contribute to an array of defense reactions to the non-host bacterial invasion.

한국산(韓國産) 충생균류(蟲生菌類)에 대한 연구(硏究) (I) (Studies on the Laboulbeniomycetes in Korea (I))

  • 이용보;이지열
    • 한국균학회지
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    • 제9권4호
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    • pp.177-192
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    • 1981
  • 한국산(韓國産) 충생균류(蟲生菌類)에 관(關)한 연구(硏究)가 저자(著者)들에 의해서 채집(採集)된 많은 곤충(昆蟲)들 중에서 여러 종(種)들이 발견(發見)되었다. 이 논문(論文)에서 Carabidae, Endomychidae, Staphyinidae과(科)들의 곤충(昆蟲)들 중에서 발견(發見)된 이 균류(菌類)의 4속(屬) 7종(種)은 한국에서 처음으로 기록(記錄)된 것이며, 그것들은 다음과 같다. Dichomyces biformis Thax. (host: Philonthus micanticolis), D. furcifer Thax. (host: Philonthus sp.), Enathromyces indicus Thax. (host: Pheropsophus jessoensis), Laboulbenia exigua Thax. (host: Chlaenius varricornis Bates.), L. flagellata Peyr. (host: Anisodactylus punctatipennis Moraw.), L. vularis Peyr. (Host: Bembidion oxyglimma, Bates. B. thermarum Mostchulsky.) Rickia ancylopi Thax. (Ancylopus melanocephalus Oliv.)이다. 연구(硏究)된 모든 표본(漂本)들은 조선대학교사범대학생물학(朝鮮大學校師範大學生物學) 연구실(硏究室)에 보관되어 있다.

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Respiratory Syncytial Virus (RSV) Modulation at the Virus-Host Interface Affects Immune Outcome and Disease Pathogenesis

  • Tripp, Ralph A.
    • IMMUNE NETWORK
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    • 제13권5호
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    • pp.163-167
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    • 2013
  • The dynamics of the virus-host interface in the response to respiratory virus infection is not well-understood; however, it is at this juncture that host immunity to infection evolves. Respiratory viruses have been shown to modulate the host response to gain a replication advantage through a variety of mechanisms. Viruses are parasites and must co-opt host genes for replication, and must interface with host cellular machinery to achieve an optimal balance between viral and cellular gene expression. Host cells have numerous strategies to resist infection, replication and virus spread, and only recently are we beginning to understand the network and pathways affected. The following is a short review article covering some of the studies associated with the Tripp laboratory that have addressed how respiratory syncytial virus (RSV) operates at the virus-host interface to affects immune outcome and disease pathogenesis.

Improved Performance of White Phosphorescent Organic Light-Emitting Diodes through a Mixed-Host Structure

  • Lee, Jong-Hee;Lee, Jeong-Ik;Chu, Hye-Yong
    • ETRI Journal
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    • 제31권6호
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    • pp.642-646
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    • 2009
  • Highly efficient white phosphorescent organic light-emitting diodes with a mixed-host structure are developed and the device characteristics are studied. The introduction of a hole-transport-type host (N, N'-dicarbazolyl-3-3-benzen (mCP)) into an electron-transport-type host (m-bis-(triphenylsilyl)benzene (UGH3)) as a mixed-host emissive layer effectively achieves higher current density and lower driving voltage. The peak external quantum and power efficiency with the mixed-host structure improve up to 18.9% and 40.9 lm/W, respectively. Moreover, this mixed-host structure device shows over 30% enhanced performance compared with a single-host structure device at a luminance of 10,000 $cd/m^2$ without any change in the electroluminescence spectra.

기생충 감염에 의한 안질환과 예방 (Ophthalmic diseases caused by parasitic infections and its prevention)

  • 주경복;노병의
    • 한국안광학회지
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    • 제7권2호
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    • pp.223-228
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    • 2002
  • 기생충의 감염에 의하여 기생충증(parasitosis)이 유발하게되며 특히 안질환을 유발할 수 있는 기생충에는 원충류(Protozoa), 선충류(Nematodes), 조충류(Cestodes) 등이 있으며 이들 기생충들은 기생충과 매개체(Vector), 기생충과 숙주(Host), 숙주(Host)와 숙주(Host)의 연결고리가 있으며 이들의 관계가 오염이 되었거나 환경이 불량하여 숙주(Host)인 사람에게 기생하게되면 기생충의 독성, 숙주(Host)의 저항성 등에 따라 조직의 파괴나 염증, 알레르기 반응 등을 일으켜 질환을 일으키며 심하면 실명까지 유발케 한다. 이를 예방하려면 깨끗한 환경과 청결을 생활하여야 한다.

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대전입자를 이용한 고성능 Guest-Host 액정 디스플레이 모드 (High performance guest-host liquid crystal display mode using the charged particles)

  • 문병준;윤성호;이기동
    • 한국정보통신학회논문지
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    • 제16권7호
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    • pp.1512-1517
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    • 2012
  • 본 논문에서는 Guest-Host 디스플레이의 문제점인 낮은 명암대비비를 해결하기 위해서 음전하로 대전 된 흑색입자를 이용한 고성능 하이브리드 Guest-Host 디스플레이를 제안하였다. 우리는 패턴 된 전극구조의 설계로 전압에 따른 입자의 스위칭을 고려하였으며, 염료 및 입자의 혼합비를 최적화하여 전기광학특성을 향상 시켰다. 따라서 기존 Heilmeier Guest-Host 디스플레이에 비교하여 dark 특성을 80%이상 향상시켰으며, 명암대비비를 비교분석함으로써 제안 된 모드의 성능 우수성을 검증하였다.

Systems biology of virus-host signaling network interactions

  • Xue, Qiong;Miller-Jensen, Kathryn
    • BMB Reports
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    • 제45권4호
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    • pp.213-220
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    • 2012
  • Viruses have evolved to manipulate the host cell machinery for virus propagation, in part by interfering with the host cellular signaling network. Molecular studies of individual pathways have uncovered many viral host-protein targets; however, it is difficult to predict how viral perturbations will affect the signaling network as a whole. Systems biology approaches rely on multivariate, context-dependent measurements and computational analysis to elucidate how viral infection alters host cell signaling at a network level. Here we describe recent advances in systems analyses of signaling networks in both viral and non-viral biological contexts. These approaches have the potential to uncover virus- mediated changes to host signaling networks, suggest new therapeutic strategies, and assess how cell-to-cell variability affects host responses to infection. We argue that systems approaches will both improve understanding of how individual virus-host protein interactions fit into the progression of viral pathogenesis and help to identify novel therapeutic targets.

Mobile Host 제어를 위한 Routing Protocol 성능 비교 (A Performance Comparison Routing Protocols for control Mobile Host)

  • 김탁근;이광재;김동일
    • 한국정보통신학회:학술대회논문집
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    • 한국해양정보통신학회 2001년도 추계종합학술대회
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    • pp.129-132
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    • 2001
  • Mobile host들로 이루어진 망을 Ad hoc 망이라고 한다. 이러한 환경에서는 각 mobile node host들의 무선 전송 전파 범위의 한계 때문에 하나의 mobile host로 패킷을 목적지에 전달하기 위해서는 다른 host들간의 협력이 필수적이다. 또한 고정된 라우터가 없이 mobile host들이 라우터로 동작하므로 기존의 라우팅 프로토콜 알고리즘들은 Ad hoc 망에서는 효율적일 수 없다. 본 논문에서는 기존에 제시된 Ad hoc 망 라우팅 프로토콜들을 시뮬레이션을 통해 그 성능을 비교 분석 하고자 한다.

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Diffserv Network에서 Host 간의 QoS 보장에 관한 연구 (A Study on a QoS Provisioning for Host-to-Host in Diffserv Network)

  • 김정윤;박재성;유인태;변옥환
    • 한국정보과학회:학술대회논문집
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    • 한국정보과학회 2003년도 봄 학술발표논문집 Vol.30 No.1 (C)
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    • pp.202-204
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    • 2003
  • 변화하는 인터넷 환경에서의 005 보장은 빼놓을 수 없는 중요한 과제로 각종 제안들이 나오고 있다. 본 논문에서는 IETF(Internet Engineering Task Force)에서 제안한 Diffserv 네트워크에서 Host-to-Host의 QoS 보장에 관하여 다루었으며, DSCP(Differentiated Service Codepoint)값의 설정을 Edge Router가 아닌 Host에서 수행하여 경계라우터의 Traffic 부하를 줄이고, MWRR2(Modified Weighted Round Robin Mode2) 방식의 스케줄링을 통해 더욱더 향상된 Diffserv network에서의 Host-to-Host QoS를 제공하는 것이 목적이다. 본 논문은 IETF에서 제안된 Diffserv 방식과 본 논문에서 제안된 Diffserv 방식의 효율성 입증을 위하여, ns2 시뮬레이션을 사용하여, 비교 분석하였다.

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