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이청산,곽학구,박경재,장환,Lee, Cheong-San,Kwak, Hak-Koo,Park, Kyung-Jae,Jang, Hwan 한국동물위생학회 1998 韓國家畜衛生學會誌 Vol.21 No.1
This study was carried out to investigate the prevalence of antibody against Toxoplasma gondii in the dog by Latex agglutination test and Indirect fluorescent antibody test. Two month-old dogs were infected intraperitoneally with T gondii to observe histopathological and immunohisto-chemical changes. Results obtained through this experiment were summarized as follows ; 1. Among the serum samples of 163 heads of the dog, 10 samples(6.1%) were positive. 2. In the sex, 6 heads (7.1%) out of 84 female dogs and 4 heads(5.1%) out of 79 male dogs were positive. However, there were no significant differences between the male and female. 3. Overall proportion of agreement between indirect fluorescent antibody and Latex agglutination test in 163 sera of dogs was 97.5%. 4. When 2 month-old dogs were infected intraperitoneally with T gondii, main clinical signs were intermittent fever, dyspnea, diarrhea. In general, the infected dogs recovered closely on the 11th day of post-inoculation. 5. At necropsy, petechial and ecchymotic hemorrages and swelling in small intestine, lung, spleen, liver and kidney were observed. 6. In histopathological observation, interstitial pneumonia, hyperemia and hemorrhages in lung were observed. Focal necrosis of hepatocytes, the neutrophil and basophil in the renal tubular epithelium were observed. 7. By immunohistochemical staining using Vectorstain ABC kit, the positive cells were recognized in the lung and the liver. 8. By indirect fluorescent antibody test, the Toxoplasma antibodies in the infected dogs were detected on the 15th day of postinoculation.
도축한우에서 난소낭종의 감별진단 및 기능성에 관한 연구
이청산 ( Chung San Lee ),류대열 ( Dae Yeol Rhu ),윤호규 ( Ho Kyu Yun ),송종한 ( Jong Han Song ),이종인 ( Jong In Lee ),서국현 ( Guk Hyun Suh ),김일화 ( Ill Wha Kim ),강현구 ( Hyun Gu Kang ) 한국가축위생학회 2004 韓國家畜衛生學會誌 Vol.27 No.1
To establish the differential diagnosis and functional status in ovarian cystic cows, progesterone(P4) and estrogen(E2) level of cystic follicular fluid, ultrasonography for measuring the cystic diameter and thickness of cystic wall, and histological findings were investigated in cystic ovaries from slaughtered Korean native cows. Ovarian follicles were classified as systic if the diameter was greater than 25 mm by ultrasonography. Ovarian cysts < 3 mm of cystic wall thickness, < 10 ng/ml P4 concentration and >10 ng/ml E2 concentration were classified follicular cyst, ovarian cysts > 3 olin of cystic wall thickness, 10 ng/ml P4 concentration and <10 ng/ml E2 concentration non-functional ovarian cyst, respectively. Also ovarian cysts were classified 8 types by anatomical and hisctological findings. Ovarian cysts with corpus luteum were 3 of 73 cows and ovarian cysts without corpus luteum were 70 cows. The incidence rates of 8 various types of ovarian cysts were as follows; 2Aa 56.2%, 2Ba 20.5% and 2Ab 15.1%, respectively. The incidence rates of ovarian cysts without corpus luteum were follicular cyst 76.7% and luteal cyst 19.2%. The thickness of cystic wall were lAb 3.9 mm, 2Ab 3.3 mm and 2Bb 3.2 mm, and the cystic fluid P4 concentrations were above 10.0 ng/ml in lAb, 2Ab and 2Bb, respectively. There was significantly correlations between the thickness of cystic wall and cystic fluid P4 concentration in ovarian cysts(p<0.05). The ovarian cyst was classified follicular cysts, luteal cyst and non-functional ovarian cyst by hormone analysis. The luteal cyst was accuratly dignosed by cystic wall thickness. But follicular cysts was misdiagnosed 13 cows of 56 cystic cows. The 13 cystic cows was determined as had non-fuctional ovarian cysts. The cystic fluid P4 concentration was 3.3 ng/ml in follicular ovarian cysts and 30.1 ng/ml luteinized ovarian cysts. There was significantly positive correlations between thickness of cystic wall and serum P4 concentration in follicular(r2 = 0,59, p<0.001) and luteal cysts(r2 = 0.65, p<0.001). These results indicated that ovarian cysts had various stages of degeneration and luteal cyst was accuratly diagnosed measurement of cystic wall thickness by ultrasonography, but follicular cysts was not diagnosed only cystic diameter and cystic wall thickness. In conclusion, it is suggest that ovarian cysts was diagnosed by combination of clinical sign and anatomical cystic features.
이청산(Chung-San Lee),이덕희(Duck Hee LEE),서정철(Jung-Chul Seo) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
LED의 광특성은 LED 칩의 온도에 민감하게 반응한다. 우리는 LED의 칩 온도를 조절하며 광 효율과 밀접한 관련이 있는 전광선속을 측정하고 비교하였다. 사용한 LED는 Lamp Type White LED와 1W White LED 두 종류다. 측정 결과, Lamp type white LED는 공급 전류 70[㎃], 온도 19[℃]에서 4.79[lm], SMD white LED는 공급 전류 320[㎃], 온도 25[℃]에서 22.26[lm]으로 가장 높은 전광선속과 효율이 나오는 것을 알 수 있었다.
이청산(Chung-San Lee),이덕희(Duck Hee LEE),서정철(Jung-Chul Seo) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.5월
우리는 전광선속을 측정할 수 있는 장치를 구성하고 white LED의 전광선속을 측정하였다. 이 장치는 적분구, 광도 배렬, 전원 공급 장치, 온도 컨트롤러, 분광기, 광전송 광섬유, CCD 광 검출기, 신호처리기 등으로 구성되어 있다. 안정도 특성 측정을 통해 얻는 LED의 전광선속은 고정전류 70 [㎃]에서 10246.39 [mlm] ± 1[%]이다. 이 측정 결과는 외부 기관을 통하여 신뢰성을 얻을 계획이며, 이LED는 본 실험실에서 기준물질(Reference material, RM)로 사용하고 있다.