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생약제 혼합 발효물의 급여가 육계의 생산성과 육질에 미치는 영향
양일영 ( Il Yung Yang ),정복기 ( Bock Gie Jung ),고재형 ( Jae Hyung Ko ),이진아 ( Jin A Lee ),서국현 ( Guk Hyun Su ),이봉주 ( Bong Joo Lee ) 한국예방수의학회(구 한국수의공중보건학회) 2011 예방수의학회지 Vol.35 No.2
Our previous study demonstrated that fermented four-herb combination (Ulgum, Yagmomil, Maesil and Bokbunja) with probiotics (Saccharomyces cerevisiae, Lactobacillus acidophilus, Bacillus subtilis) (hence, this additives was designated PFH) have immune enhancing and antibacterial effects in broiler chickens. The aims of the present study were to investigate the effects of PFH on growth performance and meat quality of broiler chickens. Twenty-day-old Ross broiler chickens were fed with or without PFH for 2 weeks. Body weight gain of the 2% PFH-fed group was significantly increased compared with those of the control group (*P<0.05). Moreover, body weight gain of the 1% PFH-fed group was also showed a increased tendency compared with the control group, although the difference was not significant (P=0.06). However, no significant difference in feed intake was observed among the groups. Feed conversion ratio of the 2% PFH-fed group was significantly decreased compared with those of the control group (*P<0.05). In addition, feed conversion ratio of the 1% PFH-fed group was also showed a slightly decreased tendency compared with the control group, although the difference was not significant (P=0.07). However, no significant differences in the proximate composition (moisture, crude fat, crude protein and crude ash) and the physico-chemical index (cooking loss, shearing force, water holding capacity and pH) were found among the groups. In addition, succulence, tending and flavor in meat of all 3 groups were also not different. Taken together, these findings suggest the possibility that PFH could be used as the alternative of antibiotic growth promoters by improving the performance of broiler chickens.
서동환(Donghwan Seo),강태엽(Tae Yeob Kang),민준기(Joonki Min),이강영(Kang Young Lee),구영권(Young Gwon Gu),이강영(Kang Yung Lee),양일영(Il Young Yang),홍정표(Jeong Pyo Hong),김성규(Sung Kyu Kim),유상우(Sang Woo Yu) 한국신뢰성학회 2019 신뢰성응용연구 Vol.19 No.2
Purpose: Nowadays, it is necessary to ensure that defense systems, which have become very complex and modernized, are highly reliable. To prove the reliability of defense systems, reliability demonstration tests are usually required. The present study develops a method to design reliability demonstration tests for missiles stored in ammunition igloos without maintenance. Methods: The procedure followed herein is as follows. (1) Analysis of operation environments and effective stresses; (2) classification of fault mechanisms and their causes; (3) derivation of an accelerated factor (AF); (4) design of an accelerated test. Results: The reliability target of the missile is B10 : 10 years. Conditions for the test plan are as follows: shape parameter = 1, number of samples = 5, AF = 48.544, and confidence level = 60%. Finally, the test period according to the designed accelerated test plan was 3,139 h. Conclusion: We proposed a method to design reliability demonstration tests for missiles in the development period. The results of this study are expected to contribute to the development of reliable missiles that can be stored for long periods.