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Broad Bean Wilt Fabaviruses and Their Specific Ultrastructures
최홍수,조점덕,이금희,김정수,Choi, Hong-Soo,Choi, Jeom-Deog,Lee, Keum-Hee,Kim, Jeong-Soo Korean Society of Electron Microscopy 2001 Applied microscopy Vol.31 No.3
잠두위조바이러스(broad bean wilt virus) 5종의 분리주에 대하여 명아주 등 29종의 지표식물반응에 의한 병원성을 분류하였다. 이들 분리주에 감염된 세포에서 3종류의 서로 다른 특이한 미세구조가 관찰되었다. 첫번째 구조는 바이러스입자로 된 $1\sim2$층의 원형관(tube)이고, 둘째는 6각형의 벌집구조(comb)로서 이것은 외부모양이 원형 또는 각으로 된 구조로 구분되었으며, 셋째는 세포원형질 내에 존재하는 다량의 막구조(membrane proliferation)이었다. Pathogenicities of the five BBWV isolates were differentiated by the reactions on the 29 host plants including Chenopodium amaranticolor. Three specific ultrastructures were observed in cells infected with BBWV The first ultrastructure was the tube made of $1\sim2$ layers of virus particles. The second one was the comb structure consists of round and angled structures. The last one was the membrane proliferation in the cytosol.
최홍수,이수헌,김미경,곽해련,김정수,조점덕,최국선 한국식물병리학회 2010 식물병연구 Vol.16 No.1
Among the plant specimens requested from agricultural actual places of farmers, Agency of agricultural extension services and so forth for the diagnosis of plant virus diseases in 2009, the rate of crop types was 87.5% for vegetables, 4.0% for upland crops and 3.5% for orchids. In vegetables, the crops damaged severely by viral diseases were red pepper and tomato by the infection rate of 51.6% and 26.5%, orderly. Virus species occurring vegetables were 19 and the economically important viruses were Cucumber mosaic virus (CMV),Tomato spotted wilt virus (TSWV), Tomato yellow leaf curl virus (TYLCV), Pepper mild mottle virus (PMMoV)with the infection rate of 33.2%, 16.9%, 16.1% and 7.4%, respectively. Rice stripe virus (RSV) occurred at the whole areas of west coast in Korea in 2009, and its incidence was 14.2% mainly on the susceptible cultivars and yield loss was estimated up to 50%. TYLCV was spread at 34 areas of Si and/or Gun, 22 areas in 2009and 12 in 2008. Distribution of TSWV was expanded newly in 6 areas of Si and/or Gun including Gangryung,Gangwondo in 2009, and its occurrence areas were 23 Si and/or Gun after first incidence at Anyang area in 2004. Tomato bushy stunt virus (TBSV) was incited newly at Gimcheon area in 2009 with the infection rate of 65.2%, and its soil transmission rate was 55.0% in average.
Bimodal 입도분포를 보이는 AlN 분말의 테이프캐스팅 성형을 위한 분산효과
최홍수,이상진,Choi, Hong-Soo,Lee, Sang-Jin 한국세라믹학회 2010 한국세라믹학회지 Vol.47 No.6
Dispersion behavior of the slurries consisted of bimodal-type AlN powders was examined in non-aqueous solvent system. Azotropic solvent system and copolymer acidic dispersant were applied to the slurries. Measurements of the sedimentation height and the viscosity of the each slurry, and the test of particle size distribution of the each powder sample were conducted as examinations for the dispersion behavior at the various dispersant contents. The bimodal-type particle size distribution was continued after addition of the dispersant and small particle portions were increased as the dispersant content increases. The density of the green sheet was also increased as the dispersant content increases and a green density of $2.114\;g/cm^3$ was obtained at the sample prepared from 2.4 wt% dispersant content. The increase of large particle portions resulted in the surface defects of the green sheets.