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- 발행기관 : 강원대학교 동물생명과학연구소(구 강원대학교 동물자원공동연구소) (검색결과 351 건)
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이병오 강원대학교 동물생명과학연구소(구 강원대학교 동물자원공동연구소) 2005 동물자원연구 Vol.16 No.-
The Korean livestock industry has grown rapidly. Also the relative importance of livestock production in the total agricultural products has also increased very much. However, there are lots of problems to solve from now because of changing circumstances around Korea, such as increasing imports of low price livestock products, decreasing growth rate of domestic food consumption, and food safety problems. New directions for the animal resource industry are summarized as follows : Firstly, the business field of livestock industry must be enlarged to the animal resource area. Secondly, food safety and sustainable system are very important sectors to develop the animal resource industry in the future. Thirdly, new cooperative systems in the production field, such as integration, support system for calf raising and manure recycling are necessary. Fourthly, promotion and marketing strategies of brand products must be improved.
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이승형,정희태,양부근,김정익,박춘근 강원대학교 동물생명과학연구소(구 강원대학교 동물자원공동연구소) 2004 동물자원연구 Vol.15 No.-
This study was carried out to establish an effective system for embryo transfer techniques by educational-industrial complex. The embryos of Korean Cattle were transferred into a total of 79 recipients. The pregnancy rate were higher in Korean Cattle (38/53, 72%) than Holstein (17/26, 65%) in recipients. However, there were no significantly difference between Korean Cattle and Holstein in recipients. In embryo transfer using fresh embryos (28/39, 72%), the pregnancy rate was slightly higher than frozen-thawed embryos (68%, 27/40). In another experiment, the number of transferred embryos showed no difference in pregnancy rate, but when two embryos (75%, 21/28) transferred, the pregnancy rate was slightly higher than with one embryo (65%, 33/51). In summary, it will be useful to apply effective system for improvement of pregnancy rate and increase of the income in a farmhouse on embryo transfer of Korean Cattle by educational-industrial complex.
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사료용 비타민제의 피복을 위한 aerothermal fluidization spraying(ATFS) system의 개발
이무준,이준엽,김창혁,오상집 강원대학교 동물생명과학연구소(구 강원대학교 동물자원공동연구소) 2004 동물자원연구 Vol.15 No.-
Hybridization system, Spraying chamber coating system and aerothermal fluidization spraying (ATFS) system, were tested to find an economic and practical method for vitamin coating. Ae coating by hybridization was done by commercial hybridizer. But both spraying chamber and aerothermal fluidization spraying system were developed by authors for this test. Two vitamins, Vit. E and Vit. C, were employed for coating with four different coating materials, such as eudragit, corn zein, ethylcellulose and gelatin. Coating by hybridization was unsuccessful due to high intake velocity, temperature increase, and bridge formation between vitamin particles. Spraying chamber system was marginally successful to coat vitamins. But the quality of coated vitamin was poor possibly because of the failure of uniform mixing between vitamin and coating materials inside the chamber. Vitamin coating was successfully achieved by ATFS system. The system enables to give not only uniform mixing between coating material and vitamin, but also drying of coated vitamin and uniform diffusion of vitamin particles by thermal aeration. This result was also confirmed through surface micrograph by scanning electron microscope. Therfore, the ATFS system can be considered as a practical system for coating sensitive materials such as vitamins as well as other feed additives.
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조명현,박동헌,장현용,정희태,박춘근,김정익,양부근 강원대학교 동물생명과학연구소(구 강원대학교 동물자원공동연구소) 2004 동물자원연구 Vol.15 No.-
These studies were carried out to improve the reproductive efficiency through embryos transfer of Hanwoo IVM/IVF embryos. Following routine IVM/IVF procedure, Oocytes and zygotes were cultured for 40 to 44 h in CR1aa medium with BSA. Then 2 to 8-cell embryos were removed the cumulus cell and were cultured in CR1aa medium containing 10% fetal bovine serum and 2.5 mM taurine in 5% O2 and 5% CO2 at 38.5℃. The fresh and frozen thawed embryos of the morulae and blastocysts cultured for 6 to 9 days in vitro were transferred into recipients. The pregnancy rates of the blastocyst produced for 6, 7, 8, and 9 days in in vitro culture were 41.9, 48.6, 57.9 and 47.4%, respectively. In the developmental stage, pregnancy rates of early blastocysts (41.7%), blastocysts (57.6%) and expanded blastocysts (50.0%) were higher than that of morulae stage (00.0%). Fresh and frozen embryos on the pregnancy rates were 48.9 and 50.0%, respectively. These results indicate that the pregnancy rate after transfer were affected on embryonic stage of in vitro embryos and in vitro culture periods.
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