분만 전·후 사료급여 형태가 젖소의 생산성에 미치는 영향

기광석,김현섭,이왕식,이현준,김상범,정하연,은정식,김용국 충남대학교 농업과학연구소 2007 농업과학연구 Vol.34 No.2

This experiment was carried out to protect drops of feed intake should be plural prepartum and postpartum to reduce metabolic diseases after calving to know how feeding systems, which is divided as a low quility, a high quility and total mixed rations(TMR), affects on postpartum productivity of Holistein cows. Three diets (low or high quality forage separately fed with concentrate and TMR containing high quality roughage) were fed to 21 cows from 3 weeks prepartum to 8 weeks postpartum to examine their effects on the productivity of cows. DM intakes was noticed significantly higher with TMR (17.11kg/day) than low- quality (13.48 kg/day) and high-quality forage (13.10kg/day). TDN and CP intakes were also higher with TMR compared to other experimental diets. Mean daily milk yield was non-significant among the cows fed different diets. Blood non-esterified fatty acids(NEFA) content was higher in cows fed low-quality or high-quality forage separately with concentrate compared with those fed TMR. The results concluded that TMR feeding to transitional cows is better than feeding the low or high quality forage separately for their health and productivity. 본 시험은 분만 전 3주부터 분만 후 3주까지 전환기라고 지칭되는 시기의 젖소들에 대한 대사적 변화를 최소화하기 위한 방법으로 사료 섭취량 저하를 방지하고 분만 후 대사성 질병의 발생을 줄이기 위한 목적으로 수행되어졌다. 대사성 질병에 관여하는 주요 요인으로는 건물섭취량, 혈중 glucose 함량, NEFA 함량, 반추위 환경, 면역 등인데, 분만 전·후 Holstein 젖소에 사료급여 형태를 조·농분리(저질 조사료와 양질 조사료 급여구) 및 TMR로 다르게 하였을 때 사료섭취량 변화와 혈중 NEFA 및 glucose 함량 변화를 측정하고 분만 후 젖소의 생산성에 미치는 영향을 구명하기 위하여 수행하였다. 처리별 사료건물 섭취량은 저질 조사료 조·농 분리, 양질조사료 조·농 분리, TMR 급여구에서 각각 13.48, 13.10, 17.11kg으로 TMR 급여구에서 유의성 있게 높았으며(P〈0.05), TDN 섭취량은 처리구별 각각 7.35, 7.19, 5.66kg으로 처리간에 차이가 없었다(P〉0.05). 신체충실지수(BCS)는 저질조사료구에서는 3.03이였으며, 양질 조사료구와 TMR 급여구에서는 각각 3.19, 3.16이었다. 분만후 1주부터 5주까지 측정한 평균 산유량은 저질조사료 조·농 분리, 양질 조사료 조·농 분리, TMR 급여구에서 각각 34.1, 35.1, 35.6kg 였으며, 분만 후 4∼5주에 최고 비유기에 달했다. 처리별 평균 유지율은 저질 조사료 조·농 분리, 양질 조사료 조·농 분리, TMR 급여구에서 각각 3.74, 3.68, 3.95%였다. 혈청내 NEFA 함량은 저질 조사료 조·농 분리, 양질 조사료 조·농 분리, TMR 급여구에서 각각 744.4, 381.8,266.7μEq/L로 처리간에 큰 차이를 보여 양질 조사료 급여와 TMR 급여시 혈중 NEFA 함량이 저질 조사료 급여에 이해 유의성 있게 낮았다(P〈0.05). 혈청내 glucose함량은 저질조사료 및 양질 조사료 조·농 분리, TMR 급여구에서 각각 39.3, 56.3, 62.4mg/dl로 양질 조사료 급여와 TMR 급여시 혈중 glucose 함량이 저질 조사료급여에 비해 유의성 있게 높았다(P〈0.05). 이상의 결과들을 종합해 볼 때, 분만 전 3주부터 분만 후 3주까지의 전환기 동안 사료섭취량 증가와 대사성 질병의 지표로서 혈중 NEFA 및glucose 함량 변화를 살펴 본 결과 분만 전 3주부터는 양질의 조사료나 TMR 형태로 급여하는 것이 사료섭취량 증가와 대사성 질병의 발생을 감소시킬 수 있을 것으로 사료되었다.

수치사진측량기법을 이용한 문화재의 3차원 모델링에 관한 연구

문두열,이봉재,신문섭,오상용 동의대학교 산업기술개발연구소 2005 産業技術硏究誌 Vol.19 No.-

고해상도의 디지털 카메라는 근거리 수치사진측량에서 널리 유용하게 사용되고 있으며 점차 활용도가 증가하고 있다. 또한 사진측량 장비의 급속한 발전으로 정밀도가 많이 향상되었고 컴퓨터를 이용한 지형공간정보체계기술의 발달로 더욱 정밀한 3차원 지형의 재현과 면적 및 토공량 산정이 가능하게 되었다. 본 연구에서는 휴대가 간편하고 수치영상의 자체저장능력을 지닌 디지털 카메라를 이용하여 촬영조건의 다양한 변화에 따른 위치오차를 분석하였으며 광속조정을 통하여 높은 정확도의 화소 좌표를 획득하여 3차원 지형의 모니터링을 위한 기초 자료로 사용할 수 있도록 하였다. 또한 근거리수치사진측량기법의 국부지역모형생성과 문화재의 보존과 복원을 보다 효율적으로 하기 위해 수치정보 분석에 관한 연구를 수행하여 봉분의 3차원 구현에 대한 활용방안을 모색하였다. Digital high resolution cameras are widely available, and are increasingly use in digital close-range photogrammetry. And photogrammetry instruments are developing rapidly and the precision is improving continuously. The building of 3D terrains of high precision are possible and the calculation of the areas or the earthwork volumes have high precision due to the development of the technique of the spatial information system using computer. Using the digital camera which has capacity of keeping numerical value by itself and easy carrying, we analyze the positioning error according to various change of photographing condition. Also we try to find a effective method of acquiring basis data for 3D monitoring of high-accuracy in pixel degree through digital close-range photogrammetry with bundle adjustment for local terrain model generation and 3D embodiment of tumulus. In the study is about to efficient analysis of digital information data for conservation of cultural properties.

Efficacy of a Cue-Mate Intravaginal Insert and Injection of Prostaglandin F2α for Synchronizing Estrus in Hanwoo Cattle

Sang-Rae Cho,Kuldeep Kumar,Seong-Heum Yeon,Sung-Hwan Lee,Ui-Hyung Kim,Ki-Yong Chung,Hyeon-Shup Kim,Myeung Sik Lee,Chang-Seok Park,Byoung-Chul Yang 한국수정란이식학회 2014 한국동물생명공학회지 Vol.29 No.4

The present study was performed on farm animals to test the effectiveness of progesterone-releasing intravaginal device (Cue-Mate® 1.56 g) and injection of prostaglandin F2α (PGF2α) for synchronization estrus in Hanwoo cattle. The cattle were at random stage of the estrus cycle. The cows were artificially inseminated at day 7 after Cue-Mate withdrawal, using commercial semen from Korean native bulls. There was a season effect on the estrus synchronization rate. It was higher in spring (94.3%) followed by winter (93.3%), autumn (90.4%) and summer (67.2%). In summary, The results of this study revealed that season has influences on estrus behavior of cattle with no significant effect on pregnancy rate. In summary, we suggest summer reproductive management to alleviate the effects of heat stress. It should be based on intensive cooling combined with hormonal treatment. Given that different subgroups of cows benefit differently from the treatments, selective hormonal administration should be considered.

The Effects of Vitamin A Administration to Heifer and Pregnant Cow on the Changes of Hormonal and Body Weight

Sang-Rae Cho,Ui-Hyung Kim,Kuldeep Kumar,Seung-Hwan Lee,Myeung-Sik Lee,Hyeon-Shup Kim,Hyun-Jae Lee,Byoung-Chul Yang 한국수정란이식학회 2014 한국동물생명공학회지 Vol.29 No.4

The objective of this study was to investigate the interrelationship of weight and hormonal changes through the administration of vitamin A to first time pregnant heifers. A total of 28 Korean heifers was used for this study. The heifers were divided into two groups - with vitamin A (n=14) and without vitamin A (control) (n=14) in the feed. Body weight increased in vitamin A treated heifers starting 9 months until 15 months. After pregnancy, vitamin A treated heifers were found to maintain higher body weights than the control group. Pre-pregnancy and post pregnancy progesterone levels were not different between the two groups. Serum estradiol levels of heifers at different growth stages showed relatively higher E2 levels than the control. Also, the control during pregnancy may show higher serum E2 levels than the vitamin A treated heifers. The growth phase serum estradiol levels in heifers may be relatively higher than the control. During pregnancy it showed a similar trend. Serum levels of vitamin A treated heifers did not differ from pregnant heifers at 5 months of age. However, after 5 months from conception until 8 months of treatment it showed a high level. Serum cholesterol in pregnant cows was higher in the control group than the treatment from beginning until the end of pregnancy. This is considered to be related to fetus development during pregnancy, as well as the mother's health.

Production of Iron-Binding Peptides from Colostral Whey by Enzymatic Hydrolysis

Sang Bum Kim,Myoung Soo Nam,Kwang Seok Ki,Hyeon Shup Kim,Min Jung Ku,Won Mo Cho 한국축산식품학회 2010 한국축산식품학회지 Vol.30 No.6

Colostral whey prepared from colostrum (pooled from first six post-partum milkings) was heated for 10 min at 100oC. Heated colostral whey was incubated with 1% enzymes (protein equivalent basis) for 15, 30, 60, 90, and 120 min at 50oC. Papain, pepsin, trypsin, and alcalase produced different degrees of hydrolysis (DH), 10.66%, 12.42%, 10.83%, and 25.31%, respectively, at an incubation time of 120 min. The SDS-PAGE reveals that significant amounts of bovine serum albumin (BSA), β-lactoglobulin (β-LG), and α-lactalbumin (α-LA) survived papain digestion. In contrast, pepsin completely removed BSA but not β-LG present in heated colostral whey. Alcalase completely eliminated BSA, β-LG, and α-LA. This differential hydrolysis was confirmed by reversed-phase HPLC analysis. Using ion-exchange chromatography, fraction-1 (F-1) was obtained from alcalase hydrolysate at a NaCl gradient concentration of 0.25 M. Reversed-phase HPLC chromatograms of alcalase F-1 showed numerous small peaks, which probably indicate that a variety of new peptides were produced. Iron content of alcalase F-1 was 28.94 ppm, which was the highest among all enzyme fractions, whereas iron content of colostral whey was 36.56 ppm. Main amino acids contained in alcalase F-1 were Thr (15.45%), Glu (14.12%), and Ser (10.39%). Therefore, alcalase can be used to generate good iron-binding peptides in heated colostral whey, and the resulting iron-binding peptides could be suitable as a value-added food ingredient for food supplements.

Effect of HAM-12 Treatment on Cellular Morphology of Bovine Ovary in In Vitro

Sung Jai Park,Jun Kyu Son,Kwang Soo Baek,Soo Bong Park,Byeong Soon Jeon,Hyeon Shup Kim,Tai Young Her,Byoung Ho Park,Seok Jin Kang,Joong Hui Lee,Wang Shik Lee,You Lim Choi 한국동물생명공학회(구 한국동물번식학회) 2008 발생공학 국제심포지엄 및 학술대회 Vol.2008 No.1

MCP로 제조된 황화물 첨가에 의한 분말소결재료의 가공특성

배승열(Sung Yeal Bae),안인섭(In Shup Ahn),조권구(Kwon Koo Cho),김기원(Ki Won Kim),박동규(Dong Kyu Park) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-

Metal sulfide(MeS)is well-known and widely used an additive for enhancing machinability, but the problems is extremely sensitive to reaction with moisture and thermal decomposition during sintering. In this study, micron or nano size compound powders of FeS were produced by mechano-chemical process. The machinability was also evaluated at the metal sulfide added sintered steel. Compared with the MnS additive, addition of the FeS powders to the iron resulted the formation of the sintering materials containing a spherical shape of pore, partly remained FeS rich-phase in iron matrix. Relative machinability behavior of sintering materials was investigated by the lathe manufacturing. Mechanical properties of sintering material with 1.2%FeS powders were improved rather than its using MnS powders.

Production of Iron-Binding Peptides from Colostral Whey by Enzymatic Hydrolysis

Kim, Sang-Bum,Ku, Min-Jung,Cho, Won-Mo,Ki, Kwang-Seok,Kim, Hyeon-Shup,Nam, Myoung-Soo Korean Society for Food Science of Animal Resource 2010 한국축산식품학회지 Vol.30 No.6

Colostral whey prepared from colostrum (pooled from first six post-partum milkings) was heated for 10 min at $100^{\circ}C$ Heated colostral whey was incubated with 1% enzymes (protein equivalent basis) for 15, 30, 60, 90, and 120 min at $50^{\circ}C$. Papain, pepsin, trypsin, and alcalase produced different degrees of hydrolysis (DH), 10.66%, 12.42%, 10.83%, and 25.31%, respectively, at an incubation time of 120 min. The SDS-PAGE reveals that significant amounts of bovine serum albumin (BSA), ${\beta}$-lactoglobulin (${\beta}$-LG), and ${\alpha}$-lactalbumin (${\alpha}$-LA) survived papain digestion. In contrast, pepsin completely removed BSA but not ${\beta}$-LG present in heated colostral whey. Alcalase completely eliminated BSA, ${\beta}$-LG, and ${\alpha}$-LA. This differential hydrolysis was confirmed by reversed-phase HPLC analysis. Using ion-exchange chromatography, fraction-1 (F-1) was obtained from alcalase hydrolysate at a NaCl gradient concentration of 0.25 M. Reversed-phase HPLC chromatograms of alcalase F-1 showed numerous small peaks, which probably indicate that a variety of new peptides were produced. Iron content of alcalase F-1 was 28.94 ppm, which was the highest among all enzyme fractions, whereas iron content of colostral whey was 36.56 ppm. Main amino acids contained in alcalase F-1 were Thr (15.45%), Glu (14.12%), and Ser (10.39%). Therefore, alcalase can be used to generate good iron-binding peptides in heated colostral whey, and the resulting iron-binding peptides could be suitable as a value-added food ingredient for food supplements.

Synthesis of Titanium Carbide by Thermo-Chemical Methods with TiH2 and Carbon Black Powders

( In Shup Ahn ),( Tek Kyoung Sung ),( Sung Yeal Bae ),( Ho Jung Cho ),( Dong Kyu Park ) 대한금속재료학회 ( 구 대한금속학회 ) 2006 METALS AND MATERIALS International Vol.12 No.3

A new synthesizing method for producing submicron TiC powders was studied by using TiH2 and carbon black powders. It is well known that hydrogen absorption transforms titanium from metal (h.c.p.) to brittle hydride (f.c.c.) powders by ball-milling. This research focused on obtaining submicron-sized TiC powders from the ball-milled mixture of TiH2 and carbon black by thermal treatment. The hydrogen, carbon, iron, and oxygen composition changes in the mixed powders were analyzed. Thereafter, a differential thermal analysis (DTA) test was performed to observe change of phase with ball-milling time. The TiC powders were obtained by heat treating the powders milled for 5 h at various temperatures (600-1200℃). The phase microstructure was investigated via DTA, X-ray diffraction (XRD), and scanning electron microscope (SEM). The mixture milled for 2 h had an f.c.t. structure containing 66.73 at.%H transformed to f.c.c. by milling for 4 h. After 5h of ball-milling, submicron-sized particles of 273 nm were obtained. At the isothermal heat-treating temperature of 500℃, the Ti single phase was formed completely, and the TiC phase of lattice parameter 0.310 nm was completely formed over the temperature of 1000℃.

2010 봄 부산 거가대교 건설현장과 진해해군 기지 현장견학을 다녀와서…

신상섭(Sang-Shup Shin),박재원(Jae-Won Park) 대한토목학회 2010 대한토목학회지 Vol.58 No.9