• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2012년도 학술발표논문집
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• pp.114-118
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• 2012

• Applied Biological Chemistry
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• 제17권2호
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• pp.125-137
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• 1974

Selenomonas ruminantium 균체(菌體)를 TCA로 가열(加熱) 분해(分解)한 후 chloroform : methanol (1 : 3)로 추출(抽出)한 당지질(糖脂質)을 분리(分離)하고 이 당지질(糖脂質)을 acetone가용부분(可溶部分) spot A화합물(化合物)과 acetone불용부분(不溶部分)에서 ether로 다시 가용부분(可溶部分)을 추출(抽出)한 spot B화합물(化合物)의 두 부분(部分)으로 분리(分離)하고 이 두 화합물(化合物)에 대(對)하여 각각(各各) 그 화학구조(化學構造)를 구명(究明)하며 당지질(糖脂質)의 구조(構造)를 추정(推定)한 바 다음과 같은 결과(結果)를 얻었다. 1. 두 화합물(化合物)의 적외선흡수분석결과(赤外線吸收分析結果) spot A는 amino당(糖)에 O-acyl 및 N-acyl지방산(脂肪酸)이 결합(結合)하였으며 spot B는 amino당(糖)에 O-acyl 및 N-acyl지방산(脂肪酸)이 결합(結合)하고 인(燐)을 함유(含有)하고 있음을 알았다. 2. 두 화합물(化合物)을 GLC에 의(依)하여 지방산조성(脂肪酸組成)을 조사(調査)한 바 spot A.B화합물중(化合物中)에 있는 O-acyl 및 N-acyl 지방산(脂肪酸)은 ${\beta}-OH\;C_{13:0}$지방산(脂肪酸)이 대부분(大部分)이 였는데 저급(低級)의 hydroxy지방산(脂肪酸) ${\beta}-OH\;C_{9:0}$도 특이적(特異的)으로 함유(含有)되여 있음을 알았다. 3. 두 화합물(化合物)을 hydrazine분해(分解)를 시킨 결과(結果)를 paper chromatography로 조사(調査)한 바 spot A화합물(化合物)은 glucosamine 이 2분자(分子) 결합(結合)하여 있는 chitobiose와 같은 Rf 치(値)를 나타냈음으로 2분자(分子)의 glucosamine이 결합(結合)됨을 확인(確認)하고 spot B 화합물(化合物)의 낮은 Rf치(値)는 glucosamine에 인(燐)이 결합(結合)되여 있음을 알았다. 4. spotA화합물(化合物)의 산분해물(酸分解物)을 다시 ninbydrine으로 산화분해(酸化分解) 시키면 arabinose만이 생기는 것으로 보아 glucosamine의 amino기(基)는 $C_2$의 위치(位置)에 결합(結合)하여 있음을 알았다. 5. N-acetyl화(化)한 spot A에 $NaBH_4$를 추리(處理)한 결과(結果) glucosamine의 전량(全量)이 반감(半減)하는 것으로 보아 2분자(分子)의 glucosamine이 결합(結合)되여 있는 것을 알 수 있고 Morgan-Elson반응(反應) 및 $NaIO_4$분해(分解)에 의(依)하여 2개(個)의 glucosamine은 1.6결합(結合)임을 확인(確認)하였다. 6. N-acetyl화(化)한 spot A.B화합물(化合物)에 ${\beta}-N-acetyl$ glucosarninidase를 반응(反應)시킨 결과(結果) spot A화합물(化合物)은 100% N-acetyl glucosamine으로 분해(分解)되고 spot B화합물(化合物)은 분해(分解)되지 않았으므로 spot A화합물(化合物)만이 ${\beta}$결합(結合)을 하고 있음을 알았다. 7. $^{32}P$함유(含有) spot B화합물(化合物)에 phosphodiesterase 및 phosphomonoesterase를 작용(作用)시킨 결과(結果) phosphodiesterase는 반응(反應)치 않고 phosphomonoesterase에 의(依)하여 100% $^{32}P$가 유리(遊離)되는 것으로 보아 glucosamine 2분자(分子)에 한계의 인(燐)이 monoester결합(結合)을 하고 있음을 알 수 있다. 8. spot A화합물(化合物)은 glucosaminiyl ${\beta}-1.6-glucosamine$의 결합(結合)을 하였고 O-acyl 및 N-acyl지방산(脂肪酸)이 결합(結合)되여 있으며 주지방산(主脂肪酸)은 ${\beta}-OH\;C_{13:0}$임을 알았다. 9. spot B화합물(化合物)도 glucosaminyl ${\beta}-1.6-glucosamine$의 결합(結合)을 하고 O-acyl 및 N-acyl지방산(脂肪酸)이 결합(結合)되여 있으며 주지방산(主脂肪酸)은 ${\beta}-OH\;C_{13:0}$이나 인(燐)이 monoester결합(結合)을 하고 있는 것이 spot A화합물(化合物)과 특이(特異)함을 알았다.

• 미생물학회지
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• 제15권4호
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• pp.159-169
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• 1977

The bacteria of red colonies isolated from soil were identified as Serratia marcescens. The best solvent for pigment extraction was n-buthanol and the pigment was identified as prodigiosene. The extracted pigment was stable on temperature and light but not on acidity. The redpigment color changed into red in alkaline solution. The maximum absorbancy of pigment was 466 nm in alkaline condition and 540 nm in acid condition. And the pigment formed single spot on the TLC(starch). By the result of infra red spectrum, the red pigment has the same absorption pattern comparing with, the prodigisin produced by S. marcescens strain Nima. It was confirmed that the pigment was secondary metabolite and that the maximal peak of production appeared at 30 hrs after the inoculation, when the bacterial growth was in statinary state. Referring to the effect of temperature, the pigment was not formed at $36^{\circ}C$ and the optimal temperature for both of bactrial growth and pigmentation was $30^{\circ}C$. The optimal range of pH for pigmentation was 5.0 and under the condition the bacterial growth was not affected at all. Examining the effects of light, the bacterial pigment ation was more increased in darkness than in visible light.

• 한국미생물학회:학술대회논문집
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• 한국미생물학회 2002년도 추계학술대회
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• pp.22-26
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• 2002

There are a number of ways in which environmental microbiology and microbial ecology will benefit from DNA micro array technology. These include community genome arrays, SSU rDNA arrays, environmental functional gene arrays, population biology arrays, and there are clearly more different applications of microarray technology that can be applied to relevant problems in environmental microbiology. Two types of the applications, bacterial identification chip and functional gene detection chip, will be presented. For the bacterial identification chip, a new approach employing random genome fragments that eliminates the disadvantages of traditional DNA-DNA hybridization is proposed to identify and type bacteria based on genomic DNA-DNA similarity. Bacterial genomes are fragmented randomly, and representative fragments are spotted on a glass slide and then hybridized to test genomes. Resulting hybridization profiles are used in statistical procedures to identify test strains. Second, the direct binding version of microarray with a different array design and hybridization scheme is proposed to quantify target genes in environmental samples. Reference DNA was employed to normalize variations in spot size and hybridization. The approach for designing quantitative microarrays and the inferred equation from this study provide a simple and convenient way to estimate the target gene concentration from the hybridization signal ratio.

• Journal of Chest Surgery
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• 제49권5호
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• pp.408-412
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• 2016

A 50-year-old female patient with visual disturbances was referred for further evaluation of a heart murmur. Fundoscopy revealed a Roth spot in both eyes. A physical examination showed peripheral signs of infective endocarditis, including Osler nodes, Janeway lesions, and splinter hemorrhages. Our preoperative diagnosis was subacute bacterial endocarditis with severe aortic regurgitation. The patient underwent aortic valve replacement and was treated with intravenous antibiotics for 6 weeks postoperatively. The patient made a remarkable recovery and was discharged without complications. We report this case of subacute endocarditis with all 4 classic peripheral signs in a patient who presented with visual disturbance.

• The Plant Pathology Journal
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• 제32권4호
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• pp.290-299
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• 2016

Strawberry bacterial angular leaf spot (ALS) disease, caused by Xanthomonas fragariae has become increasingly problematic in the strawberry agro-industry. ALS causes small angular water-soaked lesions to develop on the abaxial leaf surface. Studies reported optimum temperature conditions for X. fragariae are $20^{\circ}C$ and the pathogen suffers mortality above $32^{\circ}C$. However, at the nursery stage, disease symptoms have been observed under high temperature conditions. In the present study, results showed X. fragariae transmission was via infected maternal plants, precipitation, and sprinkler irrigation systems. Systemic infections were detected using X. fragariae specific primers 245A/B and 295A/B, where 300-bp and 615-bp were respectively amplified. During the nursery stage (from May to August), the pathogen was PCR detected only in maternal plants, but not in soil or irrigation water through the nursery stage. During the cultivation period, from September to March, the pathogen was detected in maternal plants, progeny, and soil, but not in water. Additionally, un-infected plants, when planted with infected plants were positive for X. fragariae via PCR at the late cultivation stage. Chemical control for X. fragariae with oxolinic acid showed 87% control effects against the disease during the nursery period, in contrast to validamycin-A, which exhibited increased efficacy against the disease during the cultivation stage (control effect 95%). To our knowledge, this is the first epidemiological study of X. fragariae in Korean strawberry fields.

• Fisheries and Aquatic Sciences
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• 제22권2호
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• pp.5.1-5.9
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• 2019

Background: Live fish import may lead to the unintended introduction of pathogens. We examined the monthly distribution of microbial pathogens in ornamental finfish imported into South Korea over a 6-month period. Results: Vibrio alginolyticus was detected in one lemon damsel in June and July; V. vulnificus was detected in one lemon damsel, one caerulean damsel, and one pearl-spot chromis and one ocellaris clownfish in July, April, and May, respectively; Photobacterium damselae was detected in one ocellaris clownfish and one caerulean damsel in June and July, respectively; V. anguillarum was detected in one pearl-spot chromis in February; V. harveyi was detected in one ocellaris clownfish and two mandarin fish in February and April, respectively; Yersinia ruckeri was detected in a pearlscale goldfish group in June and July and in two colored carp groups in July; and Lactococcus garvieae was detected in a lemon damsel group and a sutchi catfish group in July and May, respectively. European catfish virus, the only viral pathogen detected, was found in two sutchi catfish groups in May. Conclusion: This study is the first to identify pathogenic species and the presence or absence of pathogens (non-quarantine diseases) in imported ornamental finfish. These results demonstrate that various pathogens with the potential to harm indigenous fish populations can accompany ornamental finfish imported into South Korea.

• 농약과학회지
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• 제19권2호
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• pp.119-124
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• 2015

공주와 논산 육묘장에서 Pseudomonas syringae pv. syringae에 의한 세균점무늬병이 애호박에 심각한 피해를 주고 있지만, 점무늬병을 방제하기 위한 방제법이 개발되어 있지 않다. 종자처리와 방제약제를 선발하기 위하여 살균제 6종을 선택하여 병원균의 생장억제효과, 유묘에서 병 방제효과, 종자처리에 의한 병원균 및 병 방제효과를 각각 조사하였다. King's B배지에서 병원균 생장억제효과는 oxytetracycline 170 ppm, oxytetracycline 15 ppm + Streptomycin sulfate 188 ppm, oxolinic acid 200 ppm, streptomycin 200 ppm 처리 순으로 효과가 높게 확인되었다. Oxytetracycline 1.5% + streptomycin sulfate 18.8% WP와 oxytetracycline 17% WP의 유묘처리 시 방제가는 각각 71.4%, 49.4%이었다. Oxytetracycline 1.5% + streptomycin sulfate 18.8% WP를 인위적으로 감염된 종자에 처리하였을 때, 병원균의 생장을 완전히 억제하였으며, 유묘 발아실험에서 96% 방제효과를 나타내었다. Oxytetracycline 17% WP 2,000배 처리구에서 인위 감염 종자로부터 80 cfu/g의 병원균이 검출되었으며, 유묘발아실험에서 90%의 방제효과를 보였다. Streptomycin 20% WP의 2,000배액을 종자 처리하였을 때 병원균이 280 cfu/g으로 검출되었으며, 유묘발아실험에서 60% 방제효과를 나타내었다. 이러한 결과 oxytetracycline 1.5% + streptomycin sulfate 18.8% WP가 Pseudomonas syringae pv. syringae 에 의한 세균점무늬병의 방제와 종자처리를 위한 최적의 살균제로 판단된다.

• 농약과학회지
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• 제13권1호
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• pp.45-53
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• 2009

KLF01으로 명명된 세균이 토마토의 뿌리에서 분리 되었고 생화학적, 유전학적 검증을 통해 Lactobacillus sp.로 동종 되었다. In vitro 실험에서 식물성 세균인 Ralstonia solanacearum를 비롯하여, Xanthomonas axonopodis pv. citri, Xanthomonas campestris pv. vesicatoria, Eriwinia pyrifoliae, Eriwinia carotovora subsp. carotovora group에게도 저해 효과를 나타내는 것으로 확인되었다. 고추와 토마토를 이용한 in vivo 실험에서는 특히 R. solanacearum에 대해 대조구와 비교 시들음병의 진행을 저해하는 것으로 관찰되었다.

• 식물병연구
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• 제11권2호
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• pp.146-151
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• 2005

2000년 수원, 홍천, 연천 지역의 참깨 포장에서 새로운 병해가 발견되었다. 처음에는 잎에 수침상의 작은 점무늬를 형성하다가 점점 커져 괴사가 일어나고 주위로 황화되었다. 심하게 감염된 경우는 병든 잎은 떨어졌다. YDC 배지에서 병원세균을 순수 분리 하였을 때 Xanthomonas 속 세균의 전형적인 특징인 노란색 색소를 띤 세균이 형성되었다. 분리된 세균을 $10^{8}cfu/ml$로 현탁한 후 3주 동안 자란 참깨 잎에 분무 접종하였을 때 처음과 같은 증상이 재현되었다. 분리된 세균은 대조균주 X. campestris pv. sesami LMG865와 지방산 조성 및 다양한 탄소원 이용정도를 이용하여 비교하였을 때 $100\%$의 가능성으로 X. campestris pv. sesami로 동정되었다. 분리된 병원균은 $18\~36^{\circ}C$에서 생장이 양호하였으며, $27^{\circ}C$에서 가장 우수하였다. 이 보고는 국내에서 참깨의 세균성잎마름병 최초 보고이며, P. syringae pv. sesami에 의한 세균성점무늬병과 외부적인 병징으로 구별하기가 매우 어렵다.