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아연의 공급형태와 첨가수준이 이유자돈의 생산성에 미치는 영향
안성호,엄재상,김대환,백인기 ( S . H . Ahn,J . S . Um,D . H . Kim,I . K . Paik ) 한국축산학회 1998 한국축산학회지 Vol.40 No.1
An experiment was conducted to study the effects of sources and levels of dietary Zn on the performance of the weanling pigs. Twenty four, 12 in each sex, 5 wks old 3-way crossbred (Y × L × D) pigs were assigned to 4 treatments of a 2 × 2 factorial design (Zn source × level). Zn sources were ZnO or methionine-Zn chelate (Met-Zn) and supplemental levels of Zn were 100 or 200ppm. Two pigs of each sex were housed in the raised floor pen and 3 pens were assigned to each treatment. Individual pig weight and feed intake of each pen were recorded weekly for 5 wks. Average daily feed intakes (ADFI) and average daily gains (ADG) were significantly (P$lt;0.01) different among treatments. ADFI and ADG were highest in Met-Zn-200 followed by ZnO-200, Met-Zn-100 and ZnO-100. The effects of supplemental Zn sources and levels and their interaction on ADFI were not significant. The effect of supplemental Zn level on ADG was significant (P$lt;0.05), but those of supplemental Zn source and interaction were not significant. There were no significant differences in feed conversion ratio and alkaline phosphatase activity in serum among treatments. IgG concentrations in serum were significantly (P$lt;0.05) influenced by the source, Met-Zn treatments being higher than ZnO treatments. The effects of level and interaction were not significant on serum IgG, however. The levels of Zn in serum were significantly (P$lt;0.01) different among treatments. Met-Zn-200 showed the highest level followed by ZnO-200, Met-Zn-100 and ZnO-100 in serum Zn level. The effects of source and level of supplemental Zn were significant (P$lt;0.01) on serum Zn. The levels of Zn in the feces were significantly (P$lt;0.01) affected by the level of supplemental Zn. The levels of Fe and Cu in serum and feces were not significantly affected by treatments. In conclusion, the source and level of supplemental Zn influence the performance of weanling pigs. Zn availability from Met-Zn is higher than that from ZnO. High serum IgG in Met-Zn treatments indicates improvement in the immune function. These may affect the performance of weanling pigs.
최승한,설동명,안성호,이경희,Choi, S.H.,Seol, D.M.,Ahn, S.H.,Lee, K,H. 한국전자통신연구원 2006 전자통신동향분석 Vol.21 No.1
X 서버는 개발된 지 20년 동안 그리 큰 변경이 이루어지지 않았다. 하지만, 그래픽 하드웨어는 사양은 3D 그래픽 고성능으로 변화되었다. X 서버는 2D 그래픽을 처리하기위한 그래픽 시스템으로 설계되었다. 3D 그래픽 처리를 위해서 OpenGL 라이브러리를X 서버와 연동하는 작업을 해왔지만 구조적으로 3D 그래픽 드로잉을 처리하는 것은 X서버이기 때문에 성능에 한계를 드러내게 되었다. 마이크로소프트사 DirectX 구조처럼직접 그래픽 하드웨어를 제어해서 3D 그래픽 처리를 구현하고 있으며 리눅스 진영은X 서버와 공존하면서 3D 그래픽 처리를 향상시키기 위한 연구를 진행하고 있다. 본 고에서는 리눅스 진영에서 현재 진행중인 향상된 3D 그래픽 처리에 대한 기술 동향을 설명한다.
아연의 공급원과 수준이 이유자돈의 생산성과 혈청 및 분의 성상에 미치는 영향
엄재상,백인기,안성호 한국축산학회 1998 한국축산학회지 Vol.40 No.6
An experiment was conducted to study effects of the sources and levels of dietary Zn on the performances and characteristics of serum and feces in weanling pigs. Thirty six, 18 of each sex. 4 wks old. 3-way cross bred (Y x L x D) pigs were assigned to 6 treatments in a 2 x 3 factorial design (Zn sources x levels). The supplemental In sources and levels were ZnO or Zn-methionine chelate (Zn-Met) at 100, 1,000 or 2,000 ppm Zn, respectively. Three pigs were housed in a raised floor pen and 2 pens were assigned to each treatment. Individual pig weight and feed intake of each pen were recorded weekly for 4 wks. ADFI and ADG were significantly (P$lt;0.05) different among the treatments, in which Zn-Met-100 (100 ppm Z.n) were the highest. The lowest ADFI and ADG were shown in ZnO-100 (100 ppm Zn) and Zn-Met-2,000 (2.000 ppm Zn). respectively. There were no significant differences in feed conversion ratio and serum IgG concentrations among the treatments. APase activity in serum and Zn level in serum and feces showed significant (P$lt; 0.01. P$lt; 0.05 and P$lt; 0.01, respectively) differences among the treatments and were significantly (P$lt; 0.01) influenced by the Zn level. The highest APase activity and Zn level in serum were shown in Zn-Met-2000 and the highest Zn level in the feces was shown in ZnO-2000 (2,000 ppm Zn). Effects of Zn source on Zn level in serum and feces were significant (P$lt;0.01 and P$lt;0.02, respectively). Zn-Met treatments had higher serum Zn level and lower fecal Zn levels than In0 treatments. Digestibility of dry matter, crude protein and crude fiber were significantly lower in Zn-Met-2000 than in the other treatments. In conclusion, the availability of Zn from Zn-Met was higher than that from ZnO. Zn-Mct-100 showed equal or better performance and lower Zn excretion than ZnO-2000. However, the use of Zn-Met-2000 had an adverse effect on the performances of weanling pigs.