반추가축의(反芻家畜) 사료섭취량 조절과 반추에(反芻) 관한 문헌적 고찰

배동호,육종륭 한국낙농학회 1981 韓國酪農學會誌 Vol.3 No.2

The subject is reviewed with respect to the regulatory of feed intake in the ruminants. The importance of physical and physiological or metabolic regulatory mechanisms are discussed in relation to their effects upon the formation of various metabolites known to be rebated to feeding. Also, reviewed the role of rumination as a physical regulatory mechanisms.

농후사료와 볏짚을 주사료로 하는 착유우에 섬유질 사료의 보충급여가 젖생산량 및 유조성분에 미치는 영향

배동호,신정남,고기환 ( Dong Ho Bae,Jung Nam Shin,Ki Hwan Goh ) 한국낙농학회 1993 韓國酪農學會誌 Vol.15 No.1

사과박을 포함한 완전혼합사료의 착유우에 대한 효과

배동호,신정남,고기환 한국낙농학회 1994 韓國酪農學會誌 Vol.16 No.4

경북지역에서 생산된 사과박을 착유우 TMR의 38.7%로 이용했을 때 사료섭취량, 젖생산량, 유조성분 등에 미치는 영향을 알기 위하여 관행 사료를 대조구로 한 60일간의 사양시험을 실시하였다. 최고 비유기가 지난 Holstein 12두를 2구로 나누어 완전 임의 배치하였다. 사과박-TMR을 급여한 젖소의 진물 섭취량은 21.8㎏으로서 대조구의 16.5㎏에 비하여 32% 증가(P<.01)했으며, 젖생산량은 사과박-TMR 급여구가 22.4㎏으로서 대조구의 19.7㎏에 비하여 13.8%증가(P<.01)하였다. 유단백질 함량은 사과박-TMR구가 뚜렷이 증가(P<.01)했으나 유당의 함량은 감소(P<.01)했다. 유지방과 무지고형분(SNF)함량은 시험 구간에 차이 (P>.05)가 없었다. 사과박 TMR을 급여한 구의 체중은 대조구에 비하여 증가(P<.05)하였으며, 젖 ㎏ 생산당 사료비는 사과박-TMR을 급여한 것이 많이 소요되었으나, 생산된 총 유대에서 총 사료비를 제한 조수익은 사과박-TMR급여구가 많았다. Twelve Holstein milking cows were used to determine the effect of the total mixed ration that was formulated with fresh apple pomace(AP-TMR) as a major ingredient(39%, as fed basis) on dry matter intake, milk yield and milk chemical composition. AP-TMR was compared to conventional feeds (control). Dry matter intake and milk yield of the cows fed AP-TMR increased(P<.01) 32% and 13.8%, respectively, compared to those fed control diet. The dry matter intake and milk yield of the AP-TMR were 21.8㎏ and 22.4㎏, respectively. The cows fed AP-TMR increased (P<.01) their milk protein content, but decreased (P<.01) their lactose content in milk, compared to those of the control. The milk fat content and solids-non-fat in milk showed no significant differences(P>.05) with treatments. The body weight gain increased in the cows fed AP-TMR compared to that of the control. The feed cost per ㎏ milk production was higher with AP-TMR, but the gross income (caculated as total milk cost minus total feed cost) was higher with AP-TMR than the control.

젖소 육성비육우에 (育成肥育牛) 대한 가성소다처리 볏짚 펠렛 이용 및 사료가치에 관한 연구

배동호,탁태영,강태홍,김강식 ( Dong Ho Bae,Tae Young Tak,Tae Hong Kang,Kang Sik Kim ) 한국낙농학회 1981 韓國酪農學會誌 Vol.3 No.1

음식찌꺼기의 발효사료화시 수분조절제와 발효방법이 화학적 조성분 및 소화율에 미치는 영향

배동호,Bae, Dong-Ho 유기성자원학회 2000 유기물자원화 Vol.8 No.4

음식찌꺼기의 사료화를 위한 발효처리시 수분조절제로 이용되는 재료 (톱밥, 버섯폐재, 밀기울, 야자박 등)와 발효방법 (호기성파 혐기성)및 발효기간이 음식찌꺼기 사료의 사료가치에 미치는 영향을 구명하기 위한 일련의 시험을 실시하였다. 본 연구의 시험설계는 농가 지도자료로 활용 될 수 있도록 하였다. 참나무 톱밥과 소나무 톱밥의 NDF(중성세제 불용성 섬유)함량은 각각 건물기준 93.5%와 95.4%로써 사료로 이용하기는 어려운 재료라고 할 수 있다. 톱밥을 수분조절제로 50% 혼합하여 $30^{\circ}C$에서 2일간 호기성발효를 했을때 NDF 함량은 발효 전 재료에 비하여 12% 증가했고 in vitro DDM (인공반추위 건물소화율)은 48% 감소했다. 참나무 톱밥은 소나무 톱밥에 비하여 양호하였으며, 버드나무 톱밥(80%)과 밀기울(20%)을 혼합하여 팽이버섯재배의 배지로 이용된 후의 폐재는 톱밥류에 비하여 사료가치가 우수한 것으로 나타났다. 발효된 사료의 NDF함량과 건물소화율은 이용된 수분조절제의 NDF함량에 주로 관계된다는 것을 알 수 있었다. 버섯폐재를 밀기울로 대체 했을때 밀기울의 대체율이 증가함에 따라 발효된 사료의 NDF함량은 직선적으로 감소했고 소화율은 직선적으로 증가했다. NDF함량이 높은 수분조절제를 이용한 호기성발효는 발효기간이 길어질수록 NDF함량은 증가되었고 건물소화율은 감소되었다. 그러나 밀기울 만을 이용하거나 밀기울이 함유된 수분조절제는 발효기간이 연장됨에 따라 조단백질 함량이 증가되었다. 혐기성발효는 호기성 발효에 비해 전 처리구에서 NDF함량은 감소되었고 건물소화율은 향상되었다. 버섯폐재와 밀기울을 수분조절제로 이용하여 실온에서 30일간 혐기적으로 발효한 사료를 유기산 조성과 pH가를 기준으로 발효상태를 판정할 때 우수한 것으로 나타났다. Studies were conducted to know effects of the bulking agents (saw dusts, mushroom waste, wheat bran coconut meal, rice hulls) adding o moisture control, fermentation methods (aerobic and anaerobic) and periods (1 to 20 days) of food waste fermentation for animal feeds on chemical compositions and in vitro DDM (digestibility of dry matter). Experiment designs were focussed basically to obtain extension service data. The NDF (neutral detergent fiber) composition in the oak and pine saw dust were 93.5% and 95.4% (DM basis) in respectively. Thus, the fermented food waste feeds using saw dust (50%) increased NDF(12%), and decreased in vitro DDM(48%) compared to those of raw materials before aerobic fermentation. The oak saw dust showed higher DDM compared to pine. Mushroom wastes which is a residues of mushroom culture mixed originally willow saw dust (80%) and wheat bran (20%) showed quite higher feed value compared to both saw dusts. It was found that an in vitro DDM and NDF composition in fermented feeds appeared highly dependent or the NDF composition in bulking agents. With an increase wheat bran ratio substitute mushroom waste showed linearly decreased NDF, and increased in vitro DDM in the fermented food waste feeds. The fermented feeds added bottling agents composed higher NDF resulted in higher NDF and lower in vitro DDM with prolonged fermentation time. The feeds from anaerobic fermentation appeared lower NDF and higher in vitro DDM compared to those of aerobic fermentation.

AA6061-T6의 NaCl 수용액중에서의 S.C.C.연구

배동호,최용식 成均館大學校 科學技術硏究所 1983 論文集 Vol.34 No.1

Stress corrosion cracking may be defined as the spontaneous failure of a metal resulting from the combined effect of corrosion and stress. Particularly, under the specific corrosive environments contained chloride and sulphide, high strength steels and alloys are very susceptible to stress corrosion cracking. Accordingly, in this investigation, the stress corrosion cracking characteristics in the aluminum alloy AA6061-T6 sheet for the various percents NaCl solution environments wens studied. Experiments were conducted with the symmetric double edge cracked specimens at 80℃ and the various percentages of 5%, 10%, 15% and 20% in experimental room temperature. In order to accelerate the tests, 0.35% H_2O_2 was added to the NaCl solutions. The results obtained are as follows: (1) AA6061-T6 sheet in 5%, 10%, 15% and 20% NaCl solutions at 80℃, S.C.C. was occurred and according to rise the percents of NaCl solutions, incubation period was delayed and the crack growth rats was accelerated. In all cases, the crack propagation in the directions approximately perpendicular to the applied tensile stress. (2) S.C.C. behaviors in rte Log d(2a)/dt vs. K_1 relation curves provide a full representation ion I , region II and region III. (3) K_1S. c.c. value is defined around 39kg·mm^-3/2 for the AA6061-T6 sheet. (4) K_1c value is defined around 50kg·mm^-3/2 for the AA6061-T6 sheet. (5) The relation of d(2a)/dt vs. K_1 for region II is as follows: d(2a)/dt = C·10^mk1. The value of constant m is found 8.19 x 10 exp(-2).

표면처리 박강판 spot용접 이음재의 응력분포와 부식피로강도 평가

배동호,임동진 대한용접접합학회 1996 대한용접·접합학회지 Vol.14 No.2

Fatigue strength of the spot welded lap joint is considerably influenced by corrosive environments. Particularly, the chloride and the sulfide are most injurious to strength of the spot welded lap joint. Therefore, there is a need to evaluate its effect to corrosion fatigue strength for safe life design of spot welded structures. In order to evaluate their corrosion fatigue strength, corrosion fatigue tests on the spot welded lap joints of the uncoated and the coated high strength steel sheets were conducted in air and in 10% NaCl solution. Corrosion fatigue strength of the uncoated specimens were entirely lower than the coated one in NaCl solution, but those of the coated specimens in NaCl solution were lower than in air. And stress distribution in single spon welded lap joint subjected to tension-shear load was investigated by the finite element method. Using these results, we tried to evaluate corrosion fatgue strength of the various spot welded lap joints with maximum stress $\sigma_{max}$ at edge on loading side of the spot welded lap joint. We could find that corrosion fatigue strength could be quantitatively and systematically rearranged by $\sigma_{max}$.

점용접 결합부재의 파괴역학적 피로강도 평가

배동호,J.Niisawa,H.Kitagawa,최용식 한국자동차공학회 1988 한국자동차공학회 학술강연초록집 Vol.- No.-

Study on the nutritive Value of the Miscanthus sinensis in relation to its maturity

배동호 한국축산학회 1978 한국축산학회지 Vol.20 No.5

억새의 숙기별 영양가 변화에 관한 연구

배동호,J . G . 웰츠 ( Dong Ho Bae,James G . Welch ) 한국축산학회 1979 한국축산학회지 Vol.21 No.6

Transplanted Miscanthus sinessis was studied for the evaluation of nutritive value in relation to the stage of maturity. Plants were cut at eight stages of maturity beginning on June 9, and at ten-day intervals until August 23. The dry matter content of the plant was approximately constant until July 19, which was the early boot stage, and increased rapidly until August 23. The protein content decreased uniformly with each delay in cutting until July 29 which was the prebloom stage, and leveled off until August 23. The protein content until the prebloom stage was similar to that of timothy hay. The CWC and ADF contents increased fast in earlier stages of maturity and leveled off in later stages. While lignification accelerated in later stages of maturity. Until the early bloom stage, the CWC content of Miscanthus sinensis was not high compared to other grass hays. But after the midbloom stages, it was the same or a little higher `than coastal Bermuda grass pellets. A linear relationship (Y=-0.473x+94.3, R²= 0.986) between the in vitro DDM (Y) and cutting date (x) was found. The DDM declined at a rate of 0.47% per day for each day`s delay in harvesting after June There was no relationship between calcium and phosphorous content and cutting date. The average calcium content was lower than in the early bloom stage of timothy hay, and phosphorous content was similar to that of timothy hay.