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RISS 인기검색어
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- 저자 : 박대영(D. Y. Park) (검색결과 19 건)
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박대영(D. Y. Park),남궁환(H. Nam Kung),백인기(I. K. Paik) 한국축산학회 2002 한국축산학회지 Vol.44 No.3
A broiler experiment was conducted to investigate the effect of supplementing yeast culture(Saccharomyces cerevisiae, Pichia pastoris) on the growth performance, small intestinal microflora and immune response in broiler chicken. One thousand hatched broiler chickens(Ross^??) were assigned to 6 treatment; control (basal diet), CTC; chlorotetracycline 100ppm, YC-SC; yeast culture(Saccharomyces cerevisiae) 0.3%, YC-PP; yeast culture(Pichia pastoris) 0.3%, RPPC-0.1; refined Pichia pastoris culture 0.1%, RPPC-0.3; refined Pichia pastoris culture 0.3%. There were no significant differences in growth, feed intake, feed efficiency and mortality among the treatment. However, chickens fed diets with yeast cultures showed numerically higher weight gain than those fed the control diets. Supplementation of yeast cultures and CTC improved feed efficiency and decreased mortality compared to control. Nutrient digestibilities were not affected by the dietary treatment. Total number of Lactobacilli in small intestine was higher while that of Cl. perfringens was lower with yeast culture treatments than control. Small intestine E. coli population of RPPC-0.3 treatment was significantly lower than that of the control. The serum IgG concentration tended to be higher in broilers fed yeast cultures than those fed the control and CTC diet. In conclusion, the supplementation of yeast culture products showed, although not significant but, numerical advantages in productivity and profile of microbial flora and serum IgG compared to the control and CTC supplementation.
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단위가축영양 : Yeast Culture ( Saccharomyces cerevisiae , Pichia pastoris ) 의 급여가 산란계의 생산성에 미치는 영향
박대영(D . Y Park),남궁환(H . Namkung),백인기(I . K Paik) 한국축산학회 2001 한국축산학회지 Vol.43 No.5
1n order to investigate the effect of feeding yeast culture (Saccharomyces cerevisiae, Pichia pastoris) on the performance of laying hens, a feeding trial was conducted with nine hundred sixty 32-wk-old ISA-Brown layers for 10 wk. The experiment consisted of six dietary treatments: T1, (control) basal diet; T2, chlorotetracycline(CTC) 50ppm; T3, yeast culture(Saccharomyces cerevisiae) 0.3%; T4, yeast culture(Pichia pastoris) 0.3%: T5, refined Pichia pastoris culture 0.1%; and T6, refined Pichia pastoris culture 0.3%. Birds in T3 or T4 showed significantly higher(P$lt;0.05) egg production and feed intake than those fed the other diets. T1, T3 and T4 had lower feed conversion compared to the other treatments. Egg weight was highest in T4 but lowest in T3 and T6. Haugh unit was lowest in T3. Eggshell strength was highest in T1 and lowest in T4. Dietary yeast culture slightly increased the chromaticity of eggshells but did not affect the color tone of eggshells. The hens fed yeast culture tended to produce less soft-shell and broken eggs compared to the birds of control groups, but the differences were not significant. Nutrient digestibilities were not affected by the dietary treatments. The results of this experiment indicated that supplementing yeast culture (S. cerevisiae culture 0.3%, P. pastoris culture 0.3% ) to the diets of laying hens improved the egg production and reduced soft or broken eggs, but supplementing refined P. pastoris culture had no beneficial effects.
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주조용 White베어링메탈의 Bonding strength에 관한 연구
최원식(W.S.Choi),박대영(D.Y.Park),신미정(M.J Sin),최선미(S.M Choi),이창주(C.J Lee),김민규(M.K Kim) 한국산학기술학회 2014 한국산학기술학회 학술대회 Vol.- No.-
본 논문에서는 원심주조법을 사용하여 주조용 White metal의 Bonding strength에 관한 연구와 Ansys를 이용하여 주조시 최적의 주조 방법에 대해 연구하고자 한다.
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