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- 저자 : Beynen, A.C. (검색결과 3 건)
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Effects of dietary essential oils on growth performance and cholesterol metabolism in chickens
Kyung Woo Lee,Anton C. Beynen,Bong Duk Lee 한국가금학회 2003 한국가금학회 정기총회 및 학술발표회 Vol.20 No.-
사료내 낮은 수준의 항생제 첨가는 가축의 성장능력을 향상시키는 목적으로 사용하고 있다. 그러나, 항생제 사용에 따른 내성균의 출현은 결과적으로 항생제 대체제 개발을 촉진하는 계기가 있었다. 본 논문은 식물유래 정유성분의 항생제 대체제로서의 그 가능성을 알아보고자 실시하였다. 식물 정유의 항균효과는 많이 보고되었으며 정유의 독성효과는 사료첨가량 수준에서는 미약한 것으로 사료된다. 또한, 정유급여는 가금의 혈중내 콜레스테롤을 감소시키며, 또한 소화작용에도 관여하여 소화를 촉진시키는 것으로 보여진다. 결론적으로 사료내 정유의 첨가는 가금의 성장을 향상시킬 수 있으며, 식물유래 정유성분은 항생제의 대체제로서 이용될 수 있는 잠재성을 내포한 것으로 사료된다. Dietary antibiotics at low, subtherapeutic levels have been shown to improve growth performance in farm animals. However, there is a trend to look for alternatives to dietary antibiotics, due to occurrence of antibiotic-resistance bacteria. The present review explored the essential oils as the possible alternative to dietary antibiotics. The antimicrobial activities of essential oils originating from plants have been well documented while their toxicological effects are seen only at very high doses. Hypocholesterolemic effect has been reported in chickens. Essential oils may stimulate the digestion process. In conclusion, dietary essential oils may be used as alternatives to antibiotics, but whether their effects on growth performance are a consequence of antimicrobial activity needs to be studied further.
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Nguyen, Linh Q.,Everts, Henk,Beynen, Anton C. Asian Australasian Association of Animal Productio 2003 Animal Bioscience Vol.16 No.7
The effect studied was that of the feeding of shrimp by-product meal, as a source of eicosapentaenoic and docosahexaenoic acid, on growth performance and fatty acid composition of adipose tissue in growing pigs kept on small holdings in Central Vietnam. Shrimp by-product meal was exchanged with ruminant meal so that the diets contained either 0, 10 or 20% shrimp byproduct meal in the dry matter. The diets were fed on 6 different small-holder farms. The farmers fed a base diet according to their personal choice, but were instructed as to the use of shrimp by-product and ruminant meal. The diets were fed to the pigs from 70 to 126 days of age. There were three animals per treatment group per farm. The diets without and with 20% shrimp by-product meal on average contained 0.01 and 0.14 g docosahexaenoic acid/MJ of metabolisable energy (ME). Due to the higher contents of ash and crude fiber, the shrimp by-product meal containing diets had lower energy densities than the control diets. Eicosapentaenoic acid was not detectable in adipose tissue; the content of docosahexaenoic acid was generally increased after consumption of shrimp by-product meal. In spite of the concurrent high intakes of ash and crude fiber, the feeding of shrimp by-product meal had a general stimulatory effect on growth performance of the growing pigs. The intake of docosahexaenoic acid or its content in adipose tissue was not related with average daily gain. It is suggested that shrimp by-product meal may contain an unknown growth enhancing factor.
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Mitchaothai, J.,Everts, H.,Yuangklang, C.,Wittayakun, S.,Vasupen, K.,Wongsuthavas, S.,Srenanul, R.,Hovenier, R.,Beynen, A.C. Asian Australasian Association of Animal Productio 2008 Animal Bioscience Vol.21 No.7
The influence of dietary beef tallow (BT) versus sunflower oil (SO) on meat quality and apparent digestibility and deposition of individual fatty acids in the whole carcass was investigated in pigs fed diets containing either BT or SO. The diets contained equal amounts of energy in the form of the variable fats and were fed on an iso-energetic, restricted basis. Crude fat in the SO diet was better digested (p<0.001) than in the BT diet. The dietary fat type had no effect on growth performance, physical properties of the carcass and meat quality. The pigs fed the BT diet showed lower (p<0.001) apparent digestibilities for palmitic and linoleic acid, but those of oleic and ${\alpha}$-linolenic acid were not affected. The ratio of deposition in the carcass to intake of digestible fatty acids for the whole feeding period was decreased (p<0.01) for oleic and linoleic acid in pigs fed the SO diet. The pigs fed the SO diet instead of the BT diet had a lower (p<0.05) deposition:intake ratio for mono-unsaturated fatty acids. The calculated minimum de novo synthesis of saturated fatty acids was increased for the SO diet, but that of mono-unsaturated fatty acids was not different. In conclusion, the iso-energetic replacement of BT by SO had a marked impact on the fatty acid composition of tissues, but did not affect carcass and meat quality traits in spite of the marked difference in the deposition of linoleic acid in adipose tissues, loin muscle and the whole body. In addition, it became clear that the type of dietary fat had marked, specific effects on the synthesis and oxidation of fatty acids.
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