• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.265-265
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• 2017

This study was carried out to develop rice variety integrated with rice bacterial blight resistance gene and to know the information of major agronomic traits of developed variety. Advanced backcross Lines 21 having Xa3 and Xa21 gene cross from japonica cultivar Hwanggeumnuri and indica variety IRBB21. Days after seeding and culm length of ABLs21 were 108 days (Aug. 16) and 76 cm, respectively. Ripened grain rates was 87.4 %, which was similar to the parents. 1000 grain weight of brown rice of ABLs21 was 21.4g, which was lower than the donor parent. Milled rice yield of ABLs21 was 532 kg/10a, which was smaller than recurrent parent and higher than the donor parent. Grain length/width ratio of brown rice was form of japonica with short-ellipse and glossiness of cooked rice has japonica trait. Head rice rate showed a large difference compare to the donor parent and similar to the recurrent parent. ABLs21 would be useful genetic resources for resistance breeding program against bacterial blight.

• 한국응용곤충학회지
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• 제31권2호
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• pp.144-152
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• 1992

재래종 밤나무와 저항성 품종 밤나무(축파, 단택)에 기생하는 밤나무 혹벌의 유충에서 유약 호르몬과 유약호르몬 특이에스테라제의 활성도를 Gas liquid chromatohraphy (R ller et al.1965), Galleria cuticle wax 검사 (de Loof & van Loon 1981) 및 Liquid scintilation counter (Hammock & Sparks 1977)로 비교 측정한 결과는 다음과 같다. 유충에서 GLC로 분리한 유약호르몬은 양군 모두에서 유약호르몬 I(JH-I)로 동정되었다. 저항성 품종(축파, 단택)에 기생하는 밤나무 혹벌의 유약호르몬 함량은 35,800 GU/g와 30,900 GU/g이고, 재래종에 기생하는 밤나무 혹벌의 유약호르몬의 함량은 28,600 GU/g으로 나타났다. 유약호르몬 특이 에스테라제 활성도는 저항성 품종(축파, 단택)에 기생하는 밤나무 혹벌은 1.48 n mole/min/ml와 1.63 n mole/min/ml, 그리고 재래종에 기생하는 밤나무 혹벌은 1.89 n mole/min/ml로 측정되었다. 유약호르몬 함량은 재래종 밤나무에 기생하는 밤나무 혹벌보다 저항성 밤나무(축파, 단택)에 기생하는 밤나무 혹벌에서 더 높았으나, 유약호르몬 특이에스테라제 활성도는 저항성 밤나무(축파, 단택)보다 재래종 밤나무에 기생하는 혹벌에서 더 높게 나타나 서로 역비례 경향을 나타냈다.

• 화훼연구
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• 제18권4호
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• pp.303-307
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• 2010

A new spray chrysanthemum cultivar 'Snow Bowl' was released by National Institute of Horticultural & Herbal Science(NIHHS), Rural Development Administration (RDA), in 2008. The cross was made in 2005 between '03B1-230', breeding lines of NIHHS and 'Sei-Alps'. Trials were conducted from 2006 to 2008 for the evaluation and selection of this cultivar, including shading cultures in summer and retarding cultures in spring. The natural flowering time of 'Snow Bowl' is late October, but year-round flowering is possible by photo-periodic control. It has single type flowers with white petals. The growth of plant is very vigorous and it is resistant to white rust. The diameter of flower is 6.3cm. Number of flowers per stem and petals per flower are 12 and 31, respectively. Days to flowering under the short day treatment is about 59 and its vase life is 24.1 days in autumn season. 'Snow Bowl' was applied as No. 2009-179 on February 18, 2009 for variety protection and the plant variety protection rights have been registered as No. 3239 on August 3, 2010 at the Korea Seed and Variety Service.

• 한국미생물생명공학회:학술대회논문집
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• 한국미생물생명공학회 2000년도 Proceedings of 2000 KSAM International Symposium and Spring Meeting
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• pp.3-6
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• 2000

Antimicrobial resistance has been a well-recognized problem ever since the introduction of penicillin into clinical use. History of antimicrobial development can be categorized based on the major antibiotics that had been developed against emerging resistant $pathogens^1$. In the first period from 1940 to 1960, penicillin was a dominating antibiotic called as a "magic bullet", although S.aureus armed with penicillinase led antimicrobial era to the second period in 1960s and 1970s. The second stage was characterized by broad-spectrum penicillins and early generation cephalosporins. During this period, nosocomial infections due to gram-negative bacilli became more prevalent, while those caused by S.aureus declined. A variety of new antimicrobial agents with distinct mechanism of action including new generation cephalosporins, monobactams, carbapenems, ${\beta}$-lactamase inhibitors, and quinolones characterized the third period from 1980s to 1990s. However, extensive use of wide variety of antibiotics in the community and hospitals has fueled the crisis in emerging antimicrobial resistance. Newly appeared drug-resistant Streptococcus pneumoniae (DRSP), vancomycin-resistant enterococci (VRE), extended-spectrum ${\beta}$-lactamase-producing Klebsiella, and VRSA have posed a serious threat in many parts of the world. Given the recent epidemiology of antimicrobial resistance and its clinical impact, there is no greater challenge related to emerging infections than the emergence of antibiotic resistance. Problems of antimicrobial resistance can be amplified by the fact that resistant clones or genes can spread within or between the species as well as to geographically distant areas which leads to a global concern$^2$. Antimicrobial resistance is primarily generated and promoted by increased use of antimicrobial agents. Unfortunately, as many as 50 % of prescriptions for antibiotics are reported to be inappropriate$^3$. Injudicious use of antibiotics even for viral upper respiratory infections is a universal phenomenon in every part of the world. The use of large quantities of antibiotics in the animal health industry and farming is another major factor contributing to selection of antibiotic resistance. In addition to these background factors, the tremendous increase in the immunocompromised hosts, popular use of invasive medical interventions, and increase in travel and mixing of human populations are contributing to the resurgence and spread of antimicrobial resistance$^4$. Antimicrobial resistance has critical impact on modem medicine both in clinical and economic aspect. Patients with previously treatable infections may have fatal outcome due to therapeutic failure that is unusual event no more. The potential economic impact of antimicrobial resistance is actually uncountable. With the increase in the problems of resistant organisms in the 21st century, however, additional health care costs for this problem must be enormously increasing.

• 한국환경농학회지
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• 제21권2호
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• pp.156-161
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• 2002

냉해나 한발등의 환경스트레스에 대해 저항성을 유발하는 유전자를 환경스트레스에 강한 잡초성벼로부터 선발하고 이들 유전자를 재배벼에 도입하여 도입유전자 산물의 과량 발현을 통해 냉해나 한발 등에 대한 저항성이 향상된 벼를 선발하고자 하였다. 잡초성벼인 Bhutan 14Ad로부터 냉해 및 한발 저항성 유전자로 알려진 superoxide dismutase (SOD) cDNA를 분리하고자 mRNA를 분리하고 이 분리된 mRNA를 이용해 reverse transcriptase PCR방법으로 SOD cDNA를 cloning 하였다. 그 결과 2종의 SOD cDNA가 cloning되어 SOD-A, SOD-B로 명명하였다. 이들 cDNA의 염기서열을 결정한 결과 이들은 아미노산 서열 상동성이 88.4%를 나타내었으며, SOD-A는 Oryza sativa 계열의 Cu/Zn SOD유전자인 GenBank accession No. L36320와 99.3% 동일하였으며, SOD-B는 accession No. D01000과 100% 동일하였다. 이들 SOD-A와 SOD-B cDNA를 재배벼인 낙동벼에 형질전환하여 형질전환체 벼를 선발하였으며, 이들 형질전환체 벼의 냉해저항성및 한발저항성 검정을 통해 저항성이 향상된 형질전환체 벼를 선발하고 있다.

• 한국육종학회지
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• 제49권3호
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• pp.224-229
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• 2017

간식용 대립 땅콩의 선호도가 높음에 따라 단경 대립 다수성 신품종 육성을 위하여 단경 다분지성인 '익산 31호'와 소분지 직립 초형의 대립종인'다광'을 인공교배하여 육성한 '다안'의 주요 특성을 요약하면 다음과 같다. '다안'은 신풍 초형으로 개화기가 '대광'에 비해 1일 늦으나 주경장은 44cm로서 11cm 더 작고 분지수는 13개 정도인 단경 직립 소분지성이다. '다안'은 주당 성숙협수는 34개로서 '대광' 땅콩에 비해 10개 더 적으나, 협실비율(75%), 협당립수(1.93개), 100립중(127g)등 수량구성 요소가 우수한 대립 박피종이다. 병해저항성으로 갈반병은 '대광'과 같이 포장저항성이 있으며 흑반병, 그물무늬병, 흰비단병은 '대광' 보다 양호한 수준이다. '다안'은 단백질이 28.3%, 기름함량이 47.8%이고 지방산비율은 불포화 지방산인 올레산이 43.1%, 리놀산이 40.9%인 특성을 가지고 있다. '다안'은 3년간 4개소 지역적응시험 결과 전국 평균 5.00ton로서 대광땅콩에 비하여 16% 증수되었다. '다안'은 직립성 소분지 초형으로 생육후기 낙엽병류인 흑반병과 그물무늬병 방제가 중요하며 충분한 성숙을 위하여 경기북부와 강원도 산간 고랭지를 제외한 이남 지역에서 적응성이 높은 품종이다.

• 한국응용곤충학회지
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• 제5_6권
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• pp.47-54
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• 1968

벼의 줄무늬잎마름병 방제에 보다 능률적이고 완전한 실효를 얻기 위해 우선 본병에 대한 저항성 검정방법을비교검토하고 장려 품종 중에서 저항성품종을 선발하여 장래 저항성품종 육성의 모체를 제공할 목적으로 410품종에 대하여 저항성검정을 실시하였다. (1) 집단접종과 개체접종법을 비교 검토한 결과 발병률은 집단접종법이 다소 높은 경향이 있어 차이가 있음을 알 수 있다. (2) 발병지수에서 Lacrose는 두 방법이 모두 S였고 Zenith$\cdot$St. No.1$\cdot$St. No. 2$는 R, 나머지는 M로 나타나 같은 경향을 보여 주었다. (3) 병징형은 이병성품종에서는 모두 감수성형인 A형이 많고 저항성품종에서는 반대로 저항성병징형인 C형이 많아 두 방법이 같은 경향을 보여 주였다. (4) 410품종의 저항성검정에서 저항성이(12품종) St. No.1$\cdot$St. No. 2$\cdot$ 신 2호$\cdot$Gulfrosebonnet$\cdot$Arkroe$\cdot$Sunbonnet$\cdot$Zenith$\cdot$이천칠일찰$\cdot$농림 24호$\cdot$오백조계$\cdot$양주밭찰$\cdot$농림나 1호 등이고 남선97$\cdot\;149\cdot\;159\cdot\;216\cdot\265$호, 이황 $243\cdot\;265$, 간척 $5\cdot\;7\cdot\;8\cdot\;10\cdot\;41\cdot\;43\cdot\;47\cdot\;50$호 수원 $56\cdot$77호$\cdot$농림 22호$\cdot\;Cod-4\cdot\;Lacrose\cdot\;$적나 등은 이병성이며, 중간성이 377품종이었다. (5) 숙기별로 볼 때 큰 차이는 없으나, 만생$\cdot$조생$\cdot$중생종의 순으로 저항성이 컸다. (6) 장려품 중에서는 신 2호 외는 거의 중간성이었다.

• The Plant Pathology Journal
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• 제18권4호
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• pp.179-186
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• 2002

Four newly developed cotton mutants (M-111, M-7662, M-358 and M-218) were compared for their resistance against Cotton leaf curl virus(CLCuV) together with commercial resistant (CIM-443, CIM-482, CIM-473, FH-900 and FH-901) and susceptible (5-12) varieties by artificial inoculation through grafting and under natural field conditions. Infectivity and success of grafting were 100% in all cases. None of the grafted plants were found immune or asymptomatic. All the grafted mutants and most of their single plant progeny rows (SPPRs) showed highly resistant responses as the symptoms displayed by these mutants were milder than the commercial cultivars. Grafted mutants also had delayed disease reactions as they took more time (25-30 days) to produce disease symptoms, as compared with resistant commercial varieties that produced disease 18-22 days after inoculation. Growth of the grafted SPPRs of tested mutants was normal, which is an indication that there will be no production losses. Observations under natural infestation of whitefly showed that two SPPRs of M-ll/CE and M-7662-1/2 and one resistant variety CIM-443 exhibited slight incidence of disease, while one SPPR of M-l1/59 and S-12 were moderately susceptible and highly susceptible with 21％ and 97.l％ disease incidence, respectively. This study also showed that plants displaying more disease symptoms through grafting were easily infected under natural conditions. These results suggest that preference should be given to those plants that exhibited highly resistant responses after artificial inoculation.

• Journal of Microbiology
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• 제45권4호
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• pp.358-363
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• 2007

Multi-drug resistant Pseudomonas aeruginosa has been implicated in a variety of serious therapeutic problems in clinical environments. Among the 968 P. aeruginosa isolates obtained from two hospitals in Daegu, Korea, we acquired 17 isolates that were resistant to all available tested antimicrobial agents, with the exception of colistin (colistin-only sensitive). We characterized the antimicrobial susceptibilities, $metallo-{\beta}-lactamases$, and epidemiological relatedness among the colistin-only sensitive P. aeruginosa isolates. All colistin-only sensitive isolates were positive in the modified Hodge test and imipenem-EDTA synergy test, thereby indicating the production of $metallo-{\beta}-lactamases$. 11 isolates from the secondary hospital and six isolates from the tertiary teaching hospital harbored $bla_{VIM-2}$ and $bla_{IMP-1}$, respectively. The pulsed-field gel electrophoretic analysis of the SpeI-digested DNA from P. aeruginosa isolates indicated that two different clones of colistin-only sensitive P. aeruginosa originated from each hospital, and had spread within the hospital environment. Overall, colistin-only sensitive P. aeruginosa was detected in Korea for the first time, but no pan-drug resistant bacteria were identified. Nationwide surveillance is required in order to monitor the emergence of colistin-only sensitive or pan-drug resistant bacteria.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 추계학술대회 논문집 전기물성,응용부문
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• pp.102-105
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• 2002

ADSS(All Dielectirc Self-Supporting) cable installed under high voltage power cable line suffers a variety of environmental influence, rain, wind, snow fall, chemical pollution, salt fog and electrical stress. Its lifetime is required to be at least 20 years with this harsh weathering condition. The electrical stress under high voltage power line gives rise to dry band arcing and tracking, the severest damage, on the outer sheath of cable. Finally tracking might penetrate sheath and cause the break-down of ADSS cable. Tracking resistant sheath material, therefore, should be used to protect the core of ADSS from dry band arcing and to be sure long lifetime. In this work, we discuss various commercial tracking resistant material to investigate the way of track resistance and compare their mechanical, electrical, weathering and tracking properties through serial experiments. We found track resistant material is categorized into two main type : polyethylene with metal hydroxide and polyethylene with reduced carbon black. The Liquid contaminant, Inclined plane Tracking and Erosion test says the time to track of tracking resistant material with metal hydroxide has a little longer time to track in the high applied voltage than that with carbon black, but mechanical and weathering properties were inferior to.