• 제목/요약/키워드: New host

검색결과 1,040건 처리시간 0.025초

Glomerella cingulata (Stonem.) Spauld. & Schrenk에 의한 스타티스 탄저병 (Anthracnose of Statice Caused by Glomerella cingulata (Stonem.) Spaulding & Schrenk in Chonbuk Province)

  • 최정식;정성수;김정만;소인영
    • 한국식물병리학회지
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    • 제10권2호
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    • pp.148-150
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    • 1994
  • Anthracnose of statice (Limonium sp. var. Misty Blue and L. sinuatum Mill. cv. Early Blue) occurred up to 20% in vinyl-houses at Buan, Imsil and Namwon from July to November, 1993. All isolates from the anthracnose symptoms were identified as Glomerella cingulata (Stonem.) Spauld. & Schrenk and its anamorph was Colletotrichum gloeosporioides (Pens.) Sacc. Pathogenicity of the isolates was ascertained on the statice host by artificial inoculation. The symptoms on leaves appeared as circular brown spots in early stage and developed to zonate spots. The spot aggregated and diseased leaves were blighted. The symptom also developed on the stems of severely infected plants and the infected branches were blighted. A lots of acervuli developed on the lesions of stems. Acervuli on necrotic lesions were setose, rounded and elongated. Setae variable in length, 1~4 septate, brown, slightly swollen at the base and tapered to the apex on which conidia were occasionally borned. Statice was revealed as the new host of G. cingulata.

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한국산 무당벌레붙이과(딱정벌레목: 머리대장상과)의 분류학적 검토 (Taxonomy of Endomychidae Leach (Coleoptera: Cucujoidea) in Korea)

  • 정부희
    • 한국응용곤충학회지
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    • 제53권1호
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    • pp.39-49
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    • 2014
  • 한국산 무당벌레붙이과(Endomychidae Leach)를 분류학적으로 검토하였다. 한국산 무당벌레붙이과에는 3아과, 7속, 10종이 포함되어 있는데, 그 중 Endomychus gorhami (Lewis) Eumorphus quadriguttatus pulchripes Gerstaecker, Lycoperdina castaneipennis Gorham, Mycetina ancoriger Gorham 등 4종을 국내에서 처음으로 보고한다. 또한 Lycoperdina castaneipennis의 숙주버섯을 처음으로 보고한다.

무선 랜에서 우선순위를 할당한 다중 버퍼 사용에 따른 성능 향상에 관한 연구 (The Study for Improvement Performance on Priority Multi-Buffer Scheme in Wireless LAN)

  • 김동옥
    • 정보통신설비학회논문지
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    • 제3권2호
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    • pp.42-50
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    • 2004
  • This paper describes a new approach to Internet host mobility. We argue that local mobility, the performance of existing mobile host protocol can be significantly improved. It proposes Fast Moving Detection schemethat based on neighbor AP channel information and moving detection table. And, it composes Local Area Clustering Path (LACP) domain that collected in AP's channel information and MN interface information. It stored the roaming table to include channel information and moving detection. Those which use the proposal scheme will need to put LACP information into the beacon or probe frame. Each AP uses scheme to inform available channel information to MN. From the simulation result, we show that the proposed scheme is advantageous over the legacy schemes in terms of theburst blocking probability and the link utilization.

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Latest Comprehensive Knowledge of the Crosstalk between TLR Signaling and Mycobacteria and the Antigens Driving the Process

  • Kim, Jae-Sung;Kim, Ye-Ram;Yang, Chul-Su
    • Journal of Microbiology and Biotechnology
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    • 제29권10호
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    • pp.1506-1521
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    • 2019
  • Tuberculosis, which is caused by Mycobacterium tuberculosis (Mtb), is among the most pressing worldwide problems. Mtb uniquely interacts with innate immune cells through various pattern recognition receptors. These interactions initiate several inflammatory pathways that play essential roles in controlling Mtb pathogenesis. Although the TLR signaling pathways have essential roles in numerous host's immune defense responses, the role of TLR signaling in the response to Mtb infection is still unclear. This review presents discussions on host-Mtb interactions in terms of Mtb-mediated TLR signaling. In addition, we highlight recent discoveries pertaining to these pathways that may help in new immunotherapeutic opportunities.

Ameliorative effects of ginseng and ginsenosides on rheumatic diseases

  • Yi, Young-Su
    • Journal of Ginseng Research
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    • 제43권3호
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    • pp.335-341
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    • 2019
  • Background: Inflammation is a host-defensive innate immune response to protect the body from pathogenic agents and danger signals induced by cellular changes. Although inflammation is a host-defense mechanism, chronic inflammation is considered a major risk factor for the development of a variety of inflammatory autoimmune diseases, such as rheumatic diseases. Rheumatic diseases are systemic inflammatory and degenerative diseases that primarily affect connective tissues and are characterized by severe chronic inflammation and degeneration of connective tissues. Ginseng and its bioactive ingredients, genocides, have been demonstrated to have antiinflammatory activity and pharmacological effects on various rheumatic diseases by inhibiting the expression and production of inflammatory mediators. Methods: Literature in this review was searched in a PubMed site of National Center for Biotechnology Information. Results: The studies reporting the preventive and therapeutic effects of ginseng and ginsenosides on the pathogenesis of rheumatic diseases were discussed and summarized. Conclusion: Ginseng and ginsenosides play an ameliorative role on rheumatic diseases, and this review provides new insights into ginseng and ginsenosides as promising agents to prevent and treat rheumatic diseases.

Observing strategy for electromagnetic counterpart of gravitational wave source

  • Paek, Gregory SungHak;Im, Myungshin
    • 천문학회보
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    • 제44권1호
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    • pp.58.2-58.2
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    • 2019
  • Recent observation of the neutron star merger event, GW170817, through both gravitational wave (GW) and electromagnetic wave (EM) observations opened a new way of exploring the universe, namely, multi-messenger astronomy (MMA). One of the keys to the success of MMA is a rapid identification of EM counterpart through optical/NIR observations. We will present the strategy for prioritization of GW source host galaxy candidates to be observed with narrow-field optical telescopes. Our method relies on recent simulation results regarding plausible properties of GW source host galaxies and the low latency localization map from LIGO/Virgo. We will show the test results for both NS merger and BH merger events using previous events and possible future events and describe observing strategy with our facilities for GW events during the ongoing LIGO/Virgo O3 run.

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RNA Modification and Its Implication in Plant Pathogenic Fungi

  • Jeon, Junhyun;Lee, Song Hee
    • The Plant Pathology Journal
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    • 제37권6호
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    • pp.505-511
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    • 2021
  • Interaction of a pathogen with its host plant requires both flexibility and rapid shift in gene expression programs in response to environmental cues associated with host cells. Recently, a growing volume of data on the diversity and ubiquity of internal RNA modifications has led to the realization that such modifications are highly dynamic and yet evolutionarily conserved system. This hints at these RNA modifications being an additional regulatory layer for genetic information, culminating in epitranscriptome concept. In plant pathogenic fungi, however, the presence and the biological roles of RNA modifications are largely unknown. Here we delineate types of RNA modifications, and provide examples demonstrating roles of such modifications in biology of filamentous fungi including fungal pathogens. We also discuss the possibility that RNA modification systems in fungal pathogens could be a prospective target for new agrochemicals.

DYNAMICS OF AN IMPROVED SIS EPIDEMIC MODEL

  • Reza Memarbashi;Milad Tahavor
    • 한국수학교육학회지시리즈B:순수및응용수학
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    • 제30권2호
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    • pp.203-220
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    • 2023
  • A new modification of the SIS epidemic model incorporating the adaptive host behavior is proposed. Unlike the common situation in most epidemic models, this system has two disease-free equilibrium points, and we were able to prove that as the basic reproduction number approaches the threshold of 1, these two points merge and a Bogdanov-Takens bifurcation of codimension three occurs. The occurrence of this bifurcation is a sign of the complexity of the dynamics of the system near the value 1 of basic reproduction number. Both local and global stability of disease-free and endemic equilibrium point are studied.

Gravitational-wave EM Counterpart Korean Observatory (GECKO): Network of Telescopes and Follow-up Result for S190425z

  • Paek, Gregory SungHak;Im, Myungshin
    • 천문학회보
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    • 제44권2호
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    • pp.76.2-76.2
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    • 2019
  • Recent observation of the neutron star merger event, GW170817, through both gravitational wave (GW) and electromagnetic wave (EM) observations opened a new way of exploring the universe, namely, multi-messenger astronomy (MMA). One of the keys to the success of MMA is a rapid identification of EM counterpart. We will introduce the strategy for prioritization of GW source host galaxy candidates. Our method relies on recent simulation results regarding plausible properties of GW source host galaxies and the low latency localization map from LIGO/Virgo. We will show the test results for both NS merger and BH merger events using previous events and describe observing strategy with our facilities for GW events during the ongoing LIGO/Virgo O3 run. Finally, we report the result of follow-up observation on, the first neutron star merger event, S190425z, during LIGO/VIrgo O3 run.

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Gravitational-wave Electromagnetic Counterpart Korean Observatory (GECKO): Network of Telescopes and Follow-up Observation of GW190425

  • Paek, Gregory S.H.;Im, Myungshin
    • 천문학회보
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    • 제45권1호
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    • pp.36.3-37
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    • 2020
  • Recent observation of the neutron star merger event, GW170817, through both gravitational wave (GW) and electromagnetic wave (EM) observations opened a new way of exploring the universe, namely, multi-messenger astronomy (MMA). One of the keys to the success of MMA is a rapid identification of EM counterpart. We will introduce GW follow-up observation project in Korea for hunting GW EM counterpart rapidly and its strategy for prioritization of GW source host galaxy candidates. Our method relies on recent simulation results regarding plausible properties of GW source host galaxies and the low latency localization map from LIGO/Virgo. We will show a test result for both binary neutron star merger events using previous event and describe observing strategy with our facilities for GW events during the ongoing LIGO/Virgo O3 run. Finally, we report the results of optical/NIR follow-up observation of GW190425, the first neutron.

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