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성성숙 후 거세가 한우 거세우의 성장 및 도체형질에 미치는 효과
이성수(S . S . Lee),박노형(N . H . Park),원유석(Y . S . Won),이장헌(J . H . Lee),양일석(I . S . Yang) 한국축산학회 1999 한국축산학회지 Vol.41 No.1
8 steers and 22 bulls were employed to investigate the effects of castration after puberty on the growth performance and carcass traits of Hanwoo (Korean cattle). Even though the steers castrated at 16 months of age had a 12.9% reduction and 15.9% reduction in average daily gain (ADG) compared to bulls during the period of 16 to 25 months of age, the steers only had a 3.4% reduction in gain (P = 0.26) from birth to 25 months of age, and there was no difference in ADG during this period. Longissimus dorsi area and dressing percentage of bulls were larger and higher than those of steers (P$lt;0.05). Steers showed a superior (P$lt;0.01) marbling score to bulls (Steers : 4.8±0.32, Bulls : 1.8 ± 0.19). Therefore the castration after puberty improves meat quality and has little effect on growth performance.
로짓모형을 적용한 호텔산업 종사자의 성인지 분석을 통한 양성평등 결정요인 및 성 주류화 확산방안
원유석 ( Won Yoo Seok ),이용철 ( Yong Chul Lee ),한학진 ( Han Hag Chin ) 대한관광경영학회 2014 觀光硏究 Vol.29 No.5
본 연구는 호텔산업 종사자의 성인지와 관련하여, 양성을 위한 직업분야의 제한 및 직업선택의 자유제한, 직장 내 승진기회의 부족, 성별 급여 차이 등에 호텔산업 전반에 대한 성별에 영향을 미치는 결정요인을 분석하고자 하였다. 본 연구의 자료는 서울 및 지방에 소재하고 있는 특급호텔 및 관광호텔을 대상으로 호텔종사원을 대상으로 실시하였으며, 400부의 설문이 배포되었으며, 실증분석에는 총309부를 활용하였다. 빈도분석 및 기술통계량을 분석하였고, 남녀 간의 인식차이를 파악하기 위해 t-검증과 요인분석 및 성별영향을 분석하기 위해 로짓모형을 활용한 회귀분석을 실시하였다. 분석결과 첫째, 남녀 간의 인식차이를 파악하기 위해 t-검증을 한 결과 남성에 비하여 여성의 평균값이 낮은 것으로 파악되어 남성 종사원보다는 여성종사원이 전반적으로 양성평등에 차이를 느끼고 있는 것으로 분석되었다. 둘째, 20개 문항이 2개의 요인으로 구분되었는데, 요인1은 ‘경력개발제도 및 기회’로 요인2는 ‘인사 및 임금’으로 명명하였다. 셋째, 남녀 간의 성인지에 영향을 미치는 요인을 로지스틱 회귀분석한 결과, 성별영향에 영향을 미치는 변수는 고용형태, 직위, 요인2인(임금과 인사), 그리고 만족도가 유의적인 영향을 미치고 있는 것으로 나타났고, 승진소요기간 및 결혼 상태로 유의(P<0.1)한 것으로 분석되어 환대산업 내에서 임금과 승진에 관한 남녀 간의 성인지차이가 여전히 존재하고 있는 것으로 판단된다. 본 연구를 통해 환대산업 전 분야에서 양성 평등한 방향으로 나아가기위한 정책적이고 실무적인 대안과 성 주류화 확산방안을 제시하고자 하였다. This research tries to investigate gender mainstreaming and gender equality through gender impact assessment among hospitality industry employee. The data was collected from 309 employee who is working at seoul and local hotels from May to July, 2014. Several statistical analysis such as frequency, t-test, regression analysis using logit model were conducted. Results of this paper are as follows. First, there was a slight difference between two groups as a result of t-test for gender equality perception. Second, as a result of factor analysis using gender equality perception, two factors such as ``career development system and opportunity`` and ``personnel and salary`` were verified. Third, logit regression analysis showed that factors influencing the gender equality perception among hotel employee on employee types, position, personnel and salary(Fac 2), satisfaction. This means there is still a big difference between two groups as for salary and promotion. Practical implications including policy suggestions were discussed conclusion section.
한우 후보종모우에 selenium과 vitamin E 투여가 정액성상에 미치는 영향
이성수,박노형,원유석,박동헌,김종복,양부근,Lee, Seoung-soo,Park, No-hyoung,Won, You-seog,Park, Dong-heon,Kim, Jong-bok,Yang, Boo-keun 대한수의학회 2000 大韓獸醫學會誌 Vol.40 No.2
To improve the semen production, the selenium(Se) and vitamin E(Vit. E) were administrated into Hanwoo young sire for intensification an antioxidant system and the taurine were supplemented into semen extender for improving the semen characteristics. The 16 heads ranging from twenty to thirty two months of age were randomly assigned to control group, Se-admistrated group(Se-group), Vit. E-administrated group(Vit. E-Group) and Se and Vit. E administrated group(Se and Vit. E-group). Se and Vit. E dministrated 3 times every 30 days by intramuscular injection. The administration of Se, Vit. E, and Se and Vit. E didn't affect on semen volume, sperm concentration, and total sperm number among all groups(p>0.05). Adiministration of Se improved sperm motility and viability. Motility of Se-group and control were 26.01% and 19.20%, respectively(p<0.05). Viability of Se-group(47.07%) was higher than control group(35.73%), Vit. E group(36.55%)(p<0.05). The administration of Se and Vit. E didn't affect sperm capacitation and acrosome reaction. The 100mM taurine supplement into semen extender increased the motility of frozen/thawed semen in the Vit. E-group(p<0.05) and had a beneficial effects on decreasing abnormality of frozen/thawed semen in all groups(p<0.05). These results indicate that Se administration improve sperm motility and viability, and the taurine supplement into semen extender decrease abnormality in Hanwoo young sire.
이성수,정재경,박노형,원유석 ( S . S . Lee,J . K . Jung,N . H . Park,Y . S . Won ) 한국축산학회 1997 한국축산학회지 Vol.39 No.2
Twenty steers and 20 bulls averaging 7 Mo. of age were employed to investigate the effects of casrration on the carcass characteristics, serum metabolites and hormones of Korean cattle from 7 Mo. to 25 Mo. of age. Dressing percent(P$lt;0.05), cold carcass weight(P$lt;0.01) and longissimus dorsi area(P$lt;0.01) of bulls and steers were 57.6±0.44; 58.6±0.36%, 306.9±0.97; 344.9±0.51Kg and 74.3±0.97; 84.7±0.15㎠, respectively. Steers had more marbling score than bulls(4.4±0.11 vs 1.5±0.22; P$lt;0.01). Differences between bulls and steers in serum insulin-like growth factor-1(IGF-1) concentrations and testosterone, stimulate protein synthesis and growth, were large(P$lt;0.01) after 15 Mo. and 9 Mo. of age, respectively. Serum cortisol concentrations had increased rapidly at 19 Mo. of age both in bulls and steers. Steers had higher cortisol concentrations, stimulate lipid metabolism and deposit of intermuscular lipid, than bulls. These results suggested that castration would be extended after 15 Mo. of age to increase beef quality and to conpensate the loss of weight gain due to castration.
영양수준 , 연령 및 체중이 한우 정액성상에 미치는 영향
이성수,김진호,장윤호,박노형,원유석 ( S . S . Lee,J . H . Kim,Y . H . Jang,N . H . Park,Y . S . Won ) 한국축산학회 1998 한국축산학회지 Vol.40 No.4
Thirty proven Hanwoo sires, ranging from 5 to 9 years old, were used to investigate the effects of dietary nutrition level, age and body weight on semen characteristics which were analyzed using CASA(Computer-aided sperm analyzer) and to determine the proper nutritive level, age and body weight for production of high quality semen. The groups fed a diet meeting the NRC requirements for maintenance(NRC) had more semen volume than the groups fed at additional 10% level(NRC + 10%). However, tendencies were the opposite in sperm concentration and motion characteristics. Sperm concentrations of 9 years old sires had lower than those of others and the sires below 800㎏ body weight were better than the sires over 800㎏ body weight in sperm motion characteristics[curvilinear velocity(VCL), straight-line velocity(VSL), beat-cross frequency(BCF)] and viability. Although the interaction of age and the nutrition level had not be significant on semen characteristics, VCL, VSL and ALH(amplitude of lateral head displacement) of the groups fed at NRC + 10% were better than those of the grops fed at NRC in every age. The sperm concentration of 9 years old sires with below 800kg of body weight were the lowest. The sperm motion characteristics of 7-8 and 9 years old were best in below 700㎏ and over 700㎏ of body weight, respectively. But individual difference of sperm motion characteristics were large in 9 years old sires. In every body weight except 700∼800㎏, the semen characteristics of groups fed at NRC + 10% were better than the those of groups fed at NRC. But the semen characteristics of the group of 700∼800㎏ body weight fed at NRC was the best among the those of others. Therefore, the proper age and body weight of Hanwoo sire for production of high quality semen would be 5∼8 years old with below 800㎏ of body weight. Feeding plane of sire below and over 700㎏ body weight would be fed at NRC + 10% level and NRC, respectively.