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폐쇄순환 양식장에서의 생물여과기 (biofilter) 및 자외선살균기 (ultra-violet disinfector)효과에 대한 연구
강청근 ( Chong Keun Kang ),노기완 ( Ki Woan Ro ),류시영 ( Si Young Rhyu ),조충희 ( Chung Hee Cho ) 한국가축위생학회 1999 韓國家畜衛生學會誌 Vol.22 No.4
The most harmful nitrogenous compounds in fish-breeding place using are ammonia and nitrate. Excessively high total nitrogen concentration is the signal of unbalance for breeding fishes in seawater and may result overfeeding or overstocking without seawater treatment system. The failure of elimination for the organic ingredients or nitrogen compounds can also cause the consequence of inadequate oxygen concentration in seawater, either. The study shows the effect of biofilter and UV disinfector of seawater in the fish-breeding place. In the results, these tools had ammonia, nitrite, nitrate and decreased 71.8%, 27.6% and 1%, respectively, and the total number of microorganisms decreased up to 81.9%.
Latex 응집반응 및 polymerase chain reaction을 이용한 돼지톡소플라즈마병 감염실태 조사
심항섭 ( Hang Sub Shim ),최경묵 ( Gyeong Muk Choi ),전오숙 ( Oh Sook Jeon ),이수진 ( Su Jin Lee ),우종태 ( Jong Tae Woo ),노기완 ( Ki Woan Ro ) 한국가축위생학회 2008 韓國家畜衛生學會誌 Vol.31 No.1
Between March and October 2007, a total of 516 blood samples from pigs in the Gyeonggi province were examined for seroprevalence against toxoplasmosis by latex agglutination test (LAT) and the detection of antigenic particles among seropositive samples by PCR. In the LAT, 118 (22.8%) were positive, and the unadjusted percentage of seroprevalence rates of breeding and fattening pigs were significant difference. Positive rate (14.1%) in the breeding pigs was much lower than that (27.8%) of the fattening pigs (p<0.001, Pearson`s Chi-square test). The antibody detection rate of sows was lower than fattening pigs, i.e., 15.8% (25/158) and 26% (93/358), respectively (P=0.011, Pearson`s Chi-square test). Among 118 seropositive samples by LAT, 68 (57.6%) were positive in PCR for the detection of the toxoplasma specific-DNA. There was a statistical difference in the positive PCR reaction between the raising pigs(63/93 67.7%) and sows (5/25, 20%) (P<0.01).