• 제목/요약/키워드: natural plant

검색결과 4,743건 처리시간 0.036초

Sequence Analysis of the Coat Protein Gene of a Korean Isolate of Iris Severe Mosaic Potyvirus from Iris Plant

  • Park, Won-Mok;Lee, Sang-Seon;Park, Sun-Hee;Ju;Ryu, Ki-Hyun
    • The Plant Pathology Journal
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    • 제16권1호
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    • pp.36-42
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    • 2000
  • The coat protein gene of iris severe mosaic potyvirus, which was isolated in Korea, ISMV-K, from iris plant was cloned and its nucleotide sequence was determined. The coat protein of the virus contained 252 amino acid residues, including five potential N-glyxosylation site motifs. The coat protein of ISMV-K has 99.1% and 98.4% sequence identities with those of the Netherlands isolate of ISMV (ISMV-Ne) form crocus for the nucleotide and amino acids, respectively. The coat protein of ISMV-K has 50.4% to 60.3% nucleotide sequence identities and 47.3% to 55.7% amino acid identities with those of other 21 potyviruses, indicating ISMV to be a distinct species of the genus. The coat protein of ISMV-K was closely related with bean yellow mosaic virus and clover yellow vein virus in the phylogenetic tree analysis among the potyviruses analyzed. ISMV was easily and reliably detected from virus-infected iris leaves by RT-PCR with a set of the virus-specific primers.

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몇 가지 자생 지피식물의 차광에 따른 생장반응 (Growth Reaction of Some Ground Cover Plant in Korean Native Greening according to Shading Levels)

  • 김귀순;이정식
    • 화훼연구
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    • 제17권2호
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    • pp.75-80
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    • 2009
  • 본 연구는 음지에서 잘 자라는 자생 지피식물 선발을 위해 7종의 자생식물을 대상으로 광 조건을 달리하여 생장반응을 조사하였다. 비비추는 자연광의 60% 차광에서 가장 좋은 생장을 보였으며, 맥문동은 90% 차광에서 생육이 매우 좋았다. 관중은 60% 차광에서 생육이 가장 우수 하였으며, 대사초는 40% 차광에서 초장과 초폭이 신장이 좋았고 엽수도 많았다. 비비추, 맥문동, 관중 및 수호초는 차광율이 높을수록 엽록소 함량이 점차 증가되었으며, 맥문동은 완전음지나 자연광에서는 개화되지 않았다.

진공 동결에 의한 건조 화훼류의 품질특성 평가에 관한 연구 (The Evaluation for Quality Characteristics of Drying Flowering Plant by Vacuum-Freeze)

  • 김재돌
    • 동력기계공학회지
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    • 제15권4호
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    • pp.5-10
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    • 2011
  • In case of using rapid vacuum-freeze drying for high quality dry flower of flowering plant, the morphological and physiological characteristics of dry rose showed as the following. The dry ratio of about 82% presented after 1 day in case of using rapid vacuum-freeze drying and it was reached that the optimum storage water content of general dry products was 18%. The dry ratio of about 89% presented after 4 days. This result indicates very short dry time comparing with natural dry time of 12 days. Also, the morphological characteristics of flowering plant in case of vacuum-freeze drying showed similar shape with real flower. The contraction decreased about 9% comparing with real flower under dry time of 72 hours. But the contraction in case of natural dry decreased 36% and showed noticeable difference. The brightness which affects physiological characteristics of dry flowering plant showed lower values according to the dry process and chromaticity was thick. After 4 days, natural dry was thick with about 2 times comparing with vacuum-freeze drying. In case of vacuum-freeze drying, the quantity of anthocyanin and chlorophyl which affect discoloration and bleaching of dry flowering plant showed the clear difference comparing with natural dry method due to the sublimation by vacuum after rapid freeze with short initial time.

동부품종의 국내 분포 뿌리혹선충 저항성 검정 (Resistance of Cowpea Cultivars to Meloidogyne arenaria and M. incognita in Korea)

  • 강헌일;전태환;권순욱;김선태;강항원;김용철;김동근;고형래;최인수
    • 한국환경과학회지
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    • 제27권12호
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    • pp.1241-1247
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    • 2018
  • This study was conducted to evaluate resistance of 10 different cowpea cultivars which were introduced from the United States against two major root-knot nematodes, Meloidogyne arenaria and M. incognita, that affect greenhouse crop cultivation in Korea. The results showed that the resistance of the tested cultivars to the root-knot nematodes varied with the cultivar. Texas Cream 40 showed moderate resistance to M. arenaria whereas the other cultivars were susceptible. Purple Hull Pinkeye and Texas Pinkeye Purple Hull were found to be resistant to M. incognita, whereas Mississippi Silver showed moderate resistance and the other cultivars were susceptible. As the cultivars exhibit resistance to M. arenaria and M. incognita, such cultivars resistant to root-knot nematodes should be considered during the cultivation of cowpea as a green manure crop.

천연가스/합성가스 이용 100 MWth 매체순환연소 복합발전 플랜트의 성능 및 경제성 평가 (Performance and Economic Analysis of Natural Gas/Syngas Fueled 100 MWth Chemical-Looping Combustion Combined Cycle Plant)

  • 박영철;이태용;박재현;류호정
    • Korean Chemical Engineering Research
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    • 제47권1호
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    • pp.65-71
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    • 2009
  • 본 연구에서는 상용모사기를 이용하여 100 MWth 매체순환연소(CLC) 복합발전 플랜트의 성능 및 경제성 평가를 수행하였다. 원료로는 천연가스와 합성가스를 고려하였으며 원료에 따른 성능 및 발전단가를 비교, 분석하였다. 천연가스와 합성가스를 사용하는 경우 모두 발전 효율은 53~54% 수준으로 평가되었으며 이는 기존 연구와 부합하는 결과임을 확인하였다. 경제성 분석을 위해서 Chemical Engineering Plant Cost Index와 Guthrie 방법을 사용하여 장치비를 산정하였으며 합성가스의 저위발열량이 천연가스보다 낮기 때문에 장치비가 다소 높은 것을 확인하였다. 연료의 종류에 따른 발전단가 계산 결과 합성가스의 가격이 5.3 $/GJ 정도 되는 경우에 천연가스를 이용하는 경우의 발전단가인 5.8 ¢/kWh보다 낮아지는 것으로 나타났다.