• 한국동물위생학회지
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• 제32권1호
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• pp.27-32
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• 2009

We studied the seroprevalence of four respiratory pathogens in Korean swine farms located in Chungnam, Chungbuk, Gyeongnam and Gyeongbuk provinces during the period of spring of 2007 to winter of 2008. Serological tests were performed using commercial ELISA kits. A total of 530 serum samples were tested for the antibodies against porcine reproductive and respiratory syndrome virus (PRRSV), porcine circovirus type 2 (PCV2), Mycoplasma hyopneumoniae (M. hyo) and Actinobacillus pleuropneumoniae (APP). Seroprevalence for four respiratory pathogens were estimated by ELISA-positive rates of the submitted samples. The overall seropositive rates of PRRSV, APP, M. hyo and PCV2 were 32.6%, 10.6%, 38.4% and 88.5%, respectively. By production stage, the seropositive rate for PRRSV was highest in nursery pig populations (46.2%). In contrast, the highest seropositive rates of APP and M. hyo were observed in sow and growing pigs. However, the seroprevalence of PCV2 was ranged from 85.7% to 89.6%, showing no significant difference among the production stages. In the seroprevalence by season, PRRSV, APP and M. hyo infections revealed typical seasonal patterns that the peaks of the seropositive rates were observed between early winter and late spring. In case of PCV2, no particular seasonal patterns were noticed. The pig herds in Gyeongbuk province where PMWS was endemic during the period of survey showed the highest seropositive rates for PRRSV (44.6%), M. hyo (47.5%), and PCV2 (92.7%). Seropositive rates for APP of four provinces were approximately 10%. These results might be valuable for control and prevention of the respiratory diseases and helpful to define strategies related to vaccine applications.

• 식물병연구
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• 제12권2호
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• pp.119-121
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• 2006

2004년부터 2005년까지 경남농업기술원 약초연구팀과 합천군 가회면 농가포장에서 석류나무 과실이 심하게 부패되는 증상이 발생하였다. 병징은 과실의 끝부분이 갈색 또는 암갈색의 수침상으로 썩는다. 균총의 색깔은 감자한 천배지에서 회색이며 배지표면에 분홍색의 분생포자퇴를 형성하였다. 분생포자의 모양은 단세포, 방추형이며, 크기는 $8{\sim}16{\times}3{\sim}4{\mu}m$ 이었다. 부착기는 연한 암갈색이고 곤봉 상이며 크기는 $8{\sim}12{\times}4{\sim}6{\mu}m$ 이었다. 균사생육 적온은 $25^{\circ}C$였으며 유상접종에서 병원성이 잘 발현되었다. 이상의 결과로 보아, 이 병원균을 Colletotrichum acutatum에 의한 석류나무 탄저병으로 명명할 것을 제안한다.

• 식물병연구
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• 제12권2호
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• pp.125-128
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• 2006

2005년부터 2006년까지 진주시 초장동 농가육묘장에서 대목으로 사용한 박 (품종 : FR 커플)과 접수로 사용한 수박 (품종 : 삼복꿀수박) 에서 P. cubensis에 의한 노균병이 발생하였다. 병징은 갈색 또는 암갈색의 작은 반점이 생기고 진전됨에 따라 다각형의 병반이 형성되고 심할 경우 시들어 말라죽는다. 포자낭은 난형 또는 타원형으로 크기는 $20{\sim}32{\times}14{\sim}18{\mu}m$이었다. 포자낭경은 직립하여 나뭇가지 모양으로 끝부분에 포자낭을 많이 형성하며 크기는 $140{\sim}380{\times}4{\sim}8{\mu}m$이었다. 수박에서 병원성을 검정하였다. 대목으로 사용한 박과 접수로 사용한 수박에서 발생한 병원균의 균학적 특징을 조사한 결과, Pseudoperonospora cubensis에 의한 노균병으로 동정되었다.

• Parasites, Hosts and Diseases
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• 제53권2호
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• pp.169-175
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• 2015

The relationship between anti-Plasmodium vivax circumsporozoite protein (CSP) antibody levels and the prevalence of malaria in epidemic areas of South Korea was evaluated. Blood samples were collected from inhabitants of Gimpo-si (city), Paju-si, and Yeoncheon-gun (county) in Gyeonggi-do (province), as well as Cheorwon-gun in Gangwon-do from November to December 2004. Microscopic examinations were used to identify malaria parasites. ELISA was used to quantitate anti-circumsporozoite protein (CSP) antibodies against P. vivax. A total of 1,774 blood samples were collected. The overall CSP-ELISA-positive rate was 7.7% (n=139). The annual parasite incidences (APIs) in these areas gradually decreased from 2004 to 2005 (1.09 and 0.80, respectively). The positive rate in Gimpo (10.4%, 44/425) was the highest identified by CSP-ELISA. The highest API was found in Yeoncheon, followed by Cheorwon, Paju, and Gimpo in both years. The positive rates of CSP-ELISA were closely related to the APIs in the study areas. These results suggest that seroepidemiological studies based on CSP may be helpful in estimating the malaria prevalence in certain areas. In addition, this assay can be used to establish and evaluate malaria control and eradication programs in affected areas.

• Korean Journal of Geomatics
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• 제2권1호
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• pp.37-46
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• 2002

Accurate classification of water area is an preliminary step to accurately analyze the flooded area and damages caused by flood. This step is especially useful for monitoring the region where annually repeating flood is a problem. The accurate estimation of flooded area can ultimately be utilized as a primary source of information for the policy decision. Although SAR (Synthetic Aperture Radar) imagery with its own energy source is sensitive to the water area, its shadow effect similar to the reflectance signature of the water area should be carefully checked before accurate classification. Especially when we want to identify small flood area with mountainous environment, the step for removing shadow effect turns out to be essential in order to accurately classify the water area from the SAR imagery. In this paper, the flood area was classified and monitored using multi-temporal RADARSAT SAR images of Ok-Chun and Bo-Eun located in Chung-Book Province taken in 12th (during the flood) and 19th (after the flood) of August, 1998. We applied several steps of geometric and radiometric calculations to the SAR imagery. First we reduced the speckle noise of two SAR images and then calculated the radar backscattering coefficient $(\sigma^0)$. After that we performed the ortho-rectification via satellite orbit modeling developed in this study using the ephemeris information of the satellite images and ground control points. We also corrected radiometric distortion caused by the terrain relief. Finally, the water area was identified from two images and the flood area is calculated accordingly. The identified flood area is analyzed by overlapping with the existing land use map.

• Food Science and Biotechnology
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• 제17권4호
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• pp.888-891
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• 2008

Twenty-three fungal strains were isolated from meju that had originated from the Sunchang province, the famous location for making fermented soybean foods in Korea. The restriction fragment length polymorphism (RFLP) of the internal transcribed spacer (ITS) region of the rDNA (ITS-RFLP) was applied to differentiate the isolated fungal strains. First, the ITS region by polymerase chain reaction (PCR) with specific primers was amplified and then cleaved the products with different restriction enzymes. Cleavage of the amplified fragments with the restriction enzymes AluI, HaeIII, HhaI, and TaqI revealed extensive polymorphisms. The ITS-RFLP results highly correlated with ITS sequence analysis. All of the 23 fungal strains were classified into 5 groups by ITS-RFLP analysis. Aspergillus oryzae was the major fungal strain isolated from Sunchang meju (12 out of 23), while Aspergillus fumigatus was the next most frequently isolated strain (7 out of 23). In contrast, it was found that Fusarium asiaticum, Aspergillus sydowii, and Arthrinium sp. were the minor fungal strains in meju.

• 한국임상수의학회지
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• 제36권6호
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• pp.330-335
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• 2019

Apharyngostrigea ibis (Trematoda: Strigeidae) were obtained from the small intestine of two black-crowned night herons (Nycticorax nycticorax) and three grey herons (Ardea cinerea jouyi) between July 2006 and September 2018 in Daejeon metropolitan city and Kangwon province, Republic of Korea. The body is covered with a relatively thick cuticle, devoid of spines, and bipartite. The body measures at 2.3-3.33 × 0.86-1.20 mm, and the fore-body is ventrally concave. The oral sucker leads into a short esophagus that is devoid of a muscular pharynx. The worm was studied with a scanning electron microscope for the first time resulting in the detection of a pair of lappets located at the bilateral portion of the oral sucker. This is the first record of A. ibis in the Republic of Korea.

• 아시안잔디학회지
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• 제23권2호
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• pp.361-368
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• 2009

Cenangium ferruginosum 은 소나무류의 피목가지마름병의 원인균으로 알려져 있다. 한국에서 이 병은 1989년 처음 보고가 된 이래 2007년 봄 서울, 경기, 강원과 충북지역에서 대발생하였다. 병원균인 C. ferruginosum은 병원성이 약한 내생균으로 알려져 있으나 나무가 상처나 가뭄, 극심한 추위나 온난한 겨울 기후 등으로 인한 스트레스를 받게 되면 병 발생을 유발하게 된다. 본 연구에서는 기후변화에 따른 병 발생 동향을 이해하고자 국 내외 피목가지마름병 발생 현황 및 병원균의 특성을 설명하였다. 또한 경기, 충청, 경상지역의 발병한 잣나무 및 소나무의 병든 가지를 수집하여 병원균의 발달 과정을 관찰하였으며, 병원균을 분리하여 이들의 형태학적인 특성과 분자수준에서의 특성을 분석한 결과 C. ferruginosum 임을 확인할 수 있었다.

• Parasites, Hosts and Diseases
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• 제59권5호
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• pp.519-522
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• 2021

The Chinese edible frogs, Hoplobatrachus rugulosus (n=20), and the striped snakehead fish, Channa striata (n=34), were purchased from local markets in 3 administrative regions of Cambodia (Phnom Penh, Pursat, and Takeo Provinces) from May 2017 to April 2019, and their infection status with Gnathostoma sp. larvae was investigated. The frogs and fish were transported to the laboratory with ice and examined using the artificial digestion method. Advanced 3rd-stage larvae (AdL₃) of Gnathostoma spinigerum, 24 in total number (1-6 larvae/frog), were detected from 6 (60.0%) out of 10 frogs purchased from Phnom Penh. No gnathostome larvae were detected in 10 frogs purchased from Takeo Province and 34 snakeheads from Phnom Penh, Pursat, and Takeo Provinces. AdL₃ isolated from the frogs were 2.55-3.90 mm long and 0.31-0.36 mm wide. They had a characteristic head bulb (0.081×0.191 mm in average size) with 4 rows of hooklets, a muscular long esophagus (0.950-1.230 mm long), and 2 pairs of cervical sacs (0.530-0.890 mm long). The average number of hooklets in the 1st, 2nd, 3rd, and 4th rows was 41, 45, 48, and 51, respectively. These features were consistent with G. spinigerum AdL₃. By the present study, it has been first confirmed that the Chinese edible frog, H. rugulosus, from Phnom Penh serves as a second intermediate host for G. spinigerum, although their intensity of infection was not so high compared to other previously reported localities.

• 한국콘텐츠학회논문지
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• 제21권9호
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• pp.24-33
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• 2021

본 연구는 대구·경북지역 대학 총장 인사말에 나타난 의미론적 관계와 대학의 방향성을 탐색하였다. 2020년 9월 기준, 각 대학 웹사이트에서 인사말을 수집하였다. 분석 결과, 머리말엔 긍정적인 인상의 '여러분', '환영하다', '방문하다' 등이 자주 사용되었고 본문엔 '대학'과 '교육'이 주요 단어 쌍을 이뤘다. 연결망 중심성 분석에는 '세계'와 '글로벌'이 높은 값을 보였다. 텍스트 내에 존재하는 의미 구조의 하위 차원을 찾기 위해 군집 분석을 실시한 결과, 중심 집단 3개와 보조 집단 3개가 나타났다. 핵심 군집엔 대학의 사회적 책임과 지역발전, 그리고 세계화를 의미하는 단어들이, 보조 군집엔 사업, 꿈, 인사와 관련한 단어들이 출현하였다. 전문대학과 4년제를 비교하면 전문대학은 산업과 기술적 역량에, 4년제는 교육 역량과 학문적 연구 성과에 중점을 뒀다. 본 연구는 학령인구 감소와 변화하는 사회적 환경 속, 대구·경북 대학들이 내세우는 지향점을 파악한다는 점에서 가치를 가진다.