• Korean Journal of Veterinary Research
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• v.41 no.2
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• pp.173-176
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• 2001

The present study was conducted to examine the drug susceptibility of 57 strains of Microsporum canis isolated from dogs with dermatitis in Taegu, 1999. Antifungal susceptibility test was performed by the microdilution method, using 7 antifungal drugs as follows: itraconazole(I), terbinafine(T), ketoconazole(K), griseofulvin(G), amphotericin B(A), flucytosine(5-Fc)(F), tolnaftate(To). All tester strains of M canis were highly susceptible to T, I, K and To(geometric mean $MICs{\leq}0.007{\sim}0.155{\mu}g/ml$), while those were lowly susceptible to G, A and F(geometric mean MICs $0.285{\sim}26.430{\mu}g/ml$).

• Korean Journal of Plant Taxonomy
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• v.47 no.1
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• pp.46-50
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• 2017

The genus Lilium comprises about 100 species and is a major element of the family Liliaceae in temperate region of North Hemisphere. In the light of recent studies on the genus, we tried to examine the taxonomy of three Korean species (L. hansonii, L. tsingtauense, and L. distichum) belonging to section Martagon. The four available chloroplast regions (rbcL, matK, ndhF, and atpB) in Lilium species were selected and analyzed for a maximum likelihood phylogeny. As a results, three Korean species of section Martagon formed a monophyletic group. However, they nested within paraphyletic section Sinomartagon. Further, the discussions on taxonomic affinities of Korean species have made based on comparison between topology of phylogenetic tree and morphology.

• Nuclear Engineering and Technology
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• v.27 no.6
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• pp.911-917
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• 1995

로듐 자기 기전력형 중성자 계측기는 단위 중성자당 발생되는 전류 신호가 매우 커 계측성이 우수하나 연소율이 빨라 자주 교체해야 하므로 재장전 기간 연장 및 새로운 로듐계측기 구입 등의 문제점이 있다. 75% 연소에 해당하는 제5핵 연료 주기 기간 동안 영광 3, 4호기와 같은 C-E 원자로에 사용되고 있는 로듐 자기 기전력형 중성자 계측기의 연소 거동이 C-E에 의해서 연구되었다. 약 제3핵연료주기까지 분석한C-E의 초창기 연구에서는 중성자 방사화율 개념에 근거하여 약 66%연소시점까지 로듐계측기 연소특성곡선은 선형적임이 밝혀진 바 있다. ［l, 2］ 그 후 C-E의 연구에 의하면 약 75% 연소에 해당하는 제5핵연료 주기까지도 로듐계측기 연소 특성 곡선은 선형적임이 밝혀졌다. 그 결과로 C-E형 원자력발전소에서 사용되는 로듐 노내계측기의 수명을 약 60%연소에서 66%연소 시점까지 연장시킬 수 있게 되었다. ［3］이 정도의 계측기 수명 연장은 약 반년의 원자로 운전 기간에 해당되며 차기 핵연료주기에서 많은 로듐 노내계측기를 계속 사용할 수 있게 한다. 특히 영광 3, 4호기가 12개월 핵연료 주기에서 18개월 핵연료 주기로 재장전 전략을 바꿀 경우 로듐 노내계측기의 수명 이 연장되지 않으면 계측기 교체가 빈번해 질 것으로 사료되어 로듐 수명 연장과 관련된 기술 특히 C-E 및 B&W의 로듐 노내계측기 연소도 특성곡선 불확실도 평가 및 출력 측정 계통 오차 분석 기술을 소개하고자 한다. 영광3, 4호기에서 사용중인 로듐 노내계측기 수명을 현재 연소도 기준 66%내로 한정하고 있는데 C-E 및 B&W의 로듐 노내계측기연소 특성에 관한 연구 내용을 분석한 결과 노내계측기 수명을 연소도가 66%를 초과하는 계측기가 있어도 전체적으로 불확실도가 안전한계를 넘지 않으면 노내상주가 가능한 것으로 평가되었다.

• Korean Journal of Agricultural Science
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• v.27 no.2
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• pp.71-80
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• 2000

This study was carried out to find the botanical characters for 27 color rice genetic resources collected from domestic 17 lines (including three varieties) and exotic 10 lines. We could gain the major informations from these materials for development of color rice variety. These lines showed a various variations in characters measured. Especially, Denorado introduced from Philippine was longer in culm length, panicle length and 1,000 grains weight than others. Whereas grain length and width of Sinucninul line introduced from Japan were similar to check, Heukjinjubyo. Heterosis degree for major characteristics of Suwon#432 ${\times}$ Heukmi#940018 combination among $F_1$ hybrids superior to others in tillers per plant, panicle length and 1,000 grains weight. Therefore, these lines and their combinations were expected as color rice developing line through progeny test in the future.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.35 no.11
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• pp.1163-1168
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• 2011

Compared with the spark-ignition gasoline engine, the compression-ignition diesel engine has reduced fuel consumption due to its higher thermal efficiency. In addition, this reduction in the fuel consumption also leads to a reduction in $CO_2$ emission. Diesel engines do not require spark-ignition systems, which makes them less technically complex. Thus, diesel engines are very suitable target engines for using biofuels with high cetane numbers. In this study, the spray characteristics of biofuels such as vegetable jatropha oil and soybean oil were analyzed and compared with those of diesel oil. The injection pressures and blend ratios of jatropha oil and diesel oil (BD3, BD5, and BD20) were used as the main parameters. The injection pressures were set to 500, 1000, 1500, and 1600 bar. The injection duration was set to $500{\mu}s$. Consequently, it was found that there is no significant difference in the characteristics of the spray behavior (spray angle) in response to changes in the blend ratio of the biodiesel or changes in the injection pressure. However, at higher injection pressures, the spray angle decreased slightly.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.216-220
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• 2012

본 연구는 경기도 용인시에 위치한 공공하수처리장을 대상으로 소수력발전 성능특성을 예측하고 경제성을 분석하여 소수력발전소의 건설타당성을 제시하였다. 방류구에서의 수준측량 조사에 따르면 실제 유효 낙차는 4.3m로 나타났다. 최근 5년간 방류량 자료를 살펴보면 일평균 실제 처리량은 약 $30,000m^3/day$로 나타났으며, 우수 유입과 물 사용량이 증가하는 여름 및 가을에 처리량이 증가하였다. 설계유량은 유량변화에 따른 누적 확률밀도와 유량지속곡선에 근거해 산정하였으며, 시간빈도로 보았을 때 17%의 유량이 지속되는 $0.35m^3/sec$가 설계유량으로 나타났다. 예상되는 수차 발전용량은 11kW급이며, 시스템 가동율은 74%, 그리고 계통선에 송출될 수 있는 연 전력생산량은 71.3MWh로 나타났다. 경제성 평가는 신재생에너지 경제성 분석 도구인 RETScreen 프로그램을 사용하여 B/C ratio, IRR, 개발투자비 등의 경제성 평가지표들을 산정하였다. 편익(Benefit) 산정시 전력기준단가는 133.67원/kWh, 할인율 7%를 적용하였으며, 비용(Cost) 산정시 유지관리비는 초기 건설비의 1%, 사용연한 30년을 적용하였다. 경제성 분석결과 기흥레스피아의 소수력발전소 건설시 초기 건설공사비가 $165,000 일 때, B/C 1.0, NPV $3,534, 투자회수기간 15.1년으로 산정되었고 따라서 초기 건설비용이 $165,000 이하일 때 가장 경제적인 것으로 파악되었다.

• Korean Journal of Plant Tissue Culture
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• v.22 no.4
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• pp.229-234
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• 1995

Anthers of hybrids and inbred lines of Chinese cabbage (Brassica campestris ssp. pekinensis) were inoculated on the modified solid or liquid B$_{5}$ medium after several pre-treatments. Anthers were then maintained at 25 $^{\circ}C$ after being subjected to various post-treatment. Somatic embryos began to appear 9 days after inoculation and ended at 13th days. Low temperature pre-treatment did not increase embryoid production whereas high post-treatment temperature of 4$0^{\circ}C$ or 45$^{\circ}C$ enhance the production. There were considerable levels differences in embryogenesis between lines used, but not between the culture methods. Somatic embryo yield was also increased by subjecting anthers to one day at 35$^{\circ}C$ and then another one day at 3$0^{\circ}C$ after plating. Histological observations showed several stages in haploid development ranging from a few celled to large multiple-celled embryoids.s.

• Korean Journal of Breeding Science
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• v.41 no.4
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• pp.591-594
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• 2009

A new gerbera variety "Red Line" was released by the National Institute of Horticultural & Herbal Science (NIHHS) in 2008. A cross was made between "Mirage" with orange and double and "Rose" with red and semi-double in 2005. After investigation of the characteristics for four years (from 2005 to 2008), it was selected specially for the use of cut flower. "Red Line" is a vigorous cultivar with red (RHS R44B), black center and semi-double. The average flower diameter is 12.7 cm, large flower. And inner ray floret and disc diameter are 8.10 cm and 2.80 cm, respectively. It produces a large yield with continuous supply of flowers and has adequate peduncle height. We believe that "Red Line" has a great potential for expanding cultivated area of domestic gerbera cultivars and increasing farmers-income.

• FLOWER RESEARCH JOURNAL
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• v.16 no.3
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• pp.218-221
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• 2008

A new cultivar of Rosa hybrida 'Wooami Salmon' was developed by crossing 'Silver 87' and 'Lambada' at Gumi Floricultural Experiment Station in 2001. Characteristics trials were conducted three times from 2003 to 2006. This cultivar showed pale salmon flower color (RHS, Orange group 27-B) and standard type with good flower shape. The flower diameter is 10.8cm and the number of petals per flower is 46. Vase life of 'Wooami Salmon' could be as long as 12.8 days. The yearly mean yields of 'Wooami Salmon' was $129stems/m^2$. 'Wooami Salmon' has good quality of cut flower and strong vigor in plant growth. This cultivar is appropriate for both soil and solution(hydroponics) cultures.

• Journal of the Korean Society for Railway
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• v.11 no.5
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• pp.477-481
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• 2008

This paper dealt with a detection method of series arc existence which is a symptom of electric fires in low-voltage system. The proposed detection circuit consists of a high-pass filter with a low cut-off frequency of 3kHz to attenuate power frequency voltage by 80 dB and an active band-pass filter with a center frequency of 4kHz to detect only the series arc signals. The performance of the circuit was evaluated in a phase-controlled incandescent lamp as a non-linear load and an inverted-fed induction motor as a high frequency load by using the arc generator specified in UL1699. From the experimental results, it was confirmed that the proposed method solved the detection error, which is being the most problem, by discriminating the series arc signal even in non-linear and high frequency loads.