• 한국압력기기공학회 논문집
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• 제10권1호
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• pp.51-55
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• 2014

Based on the results of Probabilistic Safety Assessment(PSA) for a Nuclear Power Plant (NPP), Common Cause Failure(CCF) events have been recognized as one of the main contributors to the risk. Also, the CCF data and estimation method used in domestic PSA models have been pointed out as an issue with respect to the quality. The existing method of MGL and non-staggered testing even widely used were considered conservative in estimating the safety and had a limited capability in uncertainty analyses. Therefore, this paper presents the CCF estimation using a new generic data source and Alpha factor method. The analyses showed that Alpha factor and staggered method are effective in estimating the CCF contribution and risk insights of reference plant. This method will be a common bases for the optimization of new design for the construction plants as well as for the updating of safety assessment on the operating nuclear power plants.

• The Plant Pathology Journal
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• 제29권4호
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• pp.451-453
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• 2013

Common root rot caused by Cochliobolus sativus is a serious disease of barley. A simple and reliable method for assessing this disease would enhance our capacity in identifying resistance sources and developing resistant barley cultivars. In searching for such a method, a conidial suspension of C. sativus was dropped onto sterilized elongated subcrown internodes and incubated in sandwich filter paper using polyethylene transparent envelopes. Initial disease symptoms were easily detected after 48h of inoculation. Highly significant correlation coefficients were found in each experiment (A, B and C) between sandwich filter paper and seedling assays, indicating that this testing procedure was reliable. The method presented facilitates a rapid pre-selection under uniform conditions which is of importance from a breeder's point of view.

• 한국식물병리학회지
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• 제14권5호
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• pp.551-554
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• 1998

Bacterial specs isolated from common scab lesion on potato (Solanum tuberosum L. c.. Dejima) tuber was identified as Streptomyces turgidiscabies. This organism had flexuous spore chains and grey spore mass color, produced melanin pigment on ISP 7, but did not produce on ISP 6. S. turgidiscabies grew on agar media at pH 4.5, used L-arabinose, D-fructose, D-glucose, D-mannitol, raffinose, rhamnose, sucrose, D-xylose and meso-inositol as carbon sources, and was susceptible to 7% NaCl, thallium acetate (10 $\mu\textrm{g}$/ml, 100$\mu\textrm{g}$/ml), crystal violet (0.5 $\mu\textrm{g}$/ml), phenol (0.1%, wt/vol), oleandomycin (100 $\mu\textrm{g}$/ml), and streptomycin (20 $\mu\textrm{g}$/ml).

• 식물병연구
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• 제28권4호
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• pp.248-251
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• 2022

2022년 10월 충청남도 예산군(36°40'12.7"N, 126°51'36.4"E)에서 좀돌팥 흰가루병을 조사하였다. 병징은 주로 잎의 앞면에 발생하였으며 뒷면에는 흰가루병이 약하게 발병하였다. 흰가루병의 자낭구는 잎의 뒷면에서 확인하였다. 흰가루병균 무성세대 및 유성세대의 형태적 특징과 더불어 internal transcribed spacer rDNA, 28S large subunit 염기서열을 계통분석한 결과, 흰가루병균은 Podosphaera xanthii로 동정되었다. 이는 한국에서 Podosphaera xanthii에 의한 좀돌팥 흰가루병을 처음으로 보고한다.

• 한국환경복원기술학회지
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• 제15권6호
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• pp.79-89
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• 2012

This study was compared to the differences in the habitat, species composition and community structure of revegetation and nature area in Korea. Plant number in plot of revegetation and nature area was 10.3 and 15.0 taxa, respectively, and coverage was 90.6 and 88.1%, respectively. Revegetation and nature area was very heterogeneous, due to low similarity index (0.38) and less common plants. Festuca arundinacea frequency (56.7%) was highest in revegetation area, and Oplismenus undulatifolius frequency (66.7%) was highest in nature area. Plant appearing of revegetation and nature area was 111 and 136 taxa, respectively. Herb appearing of revegetation and nature areas was 93 (83.3%) and 72 (52.9%) taxa, respectively, tree was 18 (16.2%) and 64 (47.1%) taxa, respectively. Plant communities of revegetation area was classified into Lespedeza bicolor, Indigofera amblyantha, Alnus sibirica, Festuca arundinacea, Eragrostis curvula, Miscanthus sinensis, Humulus japonicus, Setaria faberii, Rudbeckia bicolor, Pueraria lobata community. Plant communities of nature area was classified into Pinus densiflora, Quercus aliena, Quercus acutissima, Quercus variabilis, Quercus serrata, Castanea crenata, Pinus rigida, Robinia pseudoacacia, Populus tomentiglandulosa, Phyllostachys bambusoides community. Habitat, species composition and community structure of revegetation and nature area showed a large difference.

• The Plant Pathology Journal
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• 제20권2호
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• pp.110-114
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• 2004

Through in vitro screening for biocontrol agents (BCAs) against Streptomyces scabiei causing potato (Solanum tuberosum) common scab, 19 streptomycete and 17 fungal isolates with antagonistic activity were selected as BCA candidates. For the selection of BCA candidates which are highly resistant to 10 kinds of antibiotics or pesticides, chemical susceptibility testing was initially performed in vitro. A remarkable degree of variation in susceptibility to antibiotics or pesticides was observed among the isolates tested. Streptomycete A020645 isolate was highly resistant to all the tested chemicals except neomycin up to 5,000 ppm. On the other hand, out of 36 antagonistic microbes subjected to in vivo pot tests using cultivar Daejima, four streptomycete isolates namely, A020645, A010321, A010564, and A020973, showed high antagonistic activity with >60% and 55% control value, respectively, and high chemical resistance to 10 kinds of chemicals. Therefore, these isolates were selected as potential BCAs for the control of potato common scab.

• 한국자원식물학회지
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• 제23권3호
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• pp.214-222
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• 2010

Many research results have indicated that many kinds of useful ingredients are rich in buckwheat, which have high nutritional values and medicinal properties, so, buckwheat has been cultivated around Asia and Europe. In this paper, genetic diversity of common and tartary buckwheat germplasms were studied based on morphological and molecular markers in order to provide useful information for conservation and utilization of buckwheat genetic resources. The length, width, thick, value and weight of the seed of the common and tartary buckwheat were measured and analyzed by the statistics methods. The result has shown that there are morphological variation both in common buckwheat and tartary buckwheat seeds collected from different regions. It also has shown that the morphological variation of tartary seeds was significantly correlated to geographical regions. The nuclear ribosomal internal transcribed spacers (ITS) of the tartary buckwheat collected from different countries were cloned, sequenced and statistically analyzed. The data showed that ITS sequences were informative to analyze the phylogeny of the tartary buckwheat and the data also showed that the genetic distances varied among different tartary buckwheat seeds collected from different countries.

• 식물조직배양학회지
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• 제27권1호
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• pp.63-69
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• 2000

Buffalo gourd의 기내배양 체계를 확립하기 위하여, 기내 발아, 증식, 발근에 적합한 생장조절제와 배양환경 조건을 구명코자 본 실험을 수행하였다. Buffalo gourd의 종자는 암상태가 명상태 보다 더 높은 발아율을 얻을 수 있었다. BA 1.0 mg/L에 IAA 0.3-0.6 mg/L가 혼용처리된 MS 배지에서 신초증식 및 생육이 가장 양호했고 kinetin과 2iP는 신초증식에 큰 영향을 미치지 않았다. 증식을 위한 적정배양 온도는 22-$25^{\circ}C$ 였다. 기내발근은 오옥신 첨가로 쉽게 유도되었는데 특히 IBA 1.0-2.0mg/L 및 IAA 2.0mg/L 단용처리가 기내 발근에 가장 효과적이었으며, 지상부 생장도 양호하였다. 발근된 신초를 포장에 이식한 결과, 생존율이 90%이상에 달하였다. Common milkweed의 종자를 기내 파종하여 명상태에서 발아시킨 결과, 발아율이 71.2%로 비교적 높았다. 전반적으로 BA가 다른 사이토키닌 보다 기내생장에 더 효과적이었으나, 농도에 따라 효과는 달랐다. BA 3.0mg/L에 IAA 0.3 mg/L 혹은 0.6mg/L 혼용처리하는 것이 신초 생체중, 마디수의 증가에 효과적이었고 2iP는 신초신장에 효과적이였다. Com-mon milkweed의 기내생장은 온도에 아주 민감하였는데, 22 $^{\circ}C$에서 생장이 양호한 반면 $25^{\circ}C$ 이상에서는 생존율이 감소하였다. Common milkweed의 경우 기내 발근율이 매우 저조하였는데 배양전 신초를 IBA 10.0~100.0 mg/L용액에 30~120분간 처리 후 MS배지에 접종하였을 경우 발근율이 4~5%로 매우 낮았다.

• Plant Resources
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• 제4권2호
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• pp.107-110
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• 2001

Many ascomycetes were collected at Mt. Moak, Mt.Jiri, Wanju and Mt.Manduckfrom September 1995 to September 1997. They were identified . According to the reusulting, Caloscypha fulgens, Geoglossum peckianum, Dasyschyphus sulfurous, Cudoniella acicularis and Biatorella resinae are newly to Korea. They weredesigned Korean common names by author.

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2004년도 생명공학 실용화를 위한 비젼
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• pp.105-105
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• 2004