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이순복,Lee, Sun-Bok 한국기계연구원 1981 기계연구원소보 Vol.4 No.1
Fatigue, the birth and growth of cracks in metal parts subjected to repeated loading, has been a problem plaguing engineers since the Industrial Revolution and the advent of rotating or reciprocating machinery. Designing against metal fatigue was studied briefly in several aspects. Examples of fatigue failures were shown. Fatigue was classified by loading: uniaxial Fatigue, multiaxial fatigue, cumulative fatigue da¬mage. Fatigue design criteria were discussed: Infinite-Life Design, Safe-Life Design, Fail-Safe Design, and Damage Tolerant Design. Mitigation of notch effects by design, improvement of fatigue strength of metal parts by residual stress and surface finishing were discussed. Relative fatigue beha¬vior was studied under various environmantal conditions. Especially the effects of corrosion, temperature, fretting, and irradiation were covered.
이순복,김선구 ( S . B . Lee,S . K . Kim ) 한국축산학회 1986 한국축산학회지 Vol.28 No.11
This trial was carried out to investigate. the optimum feeding level of optimum concentrate level, when Korean native bulls were fed maize silage and water ad libitum. The level of concentrates in this trial were 1.0% (T₁), 1.5%(T₂) and 2.0%(T₃) of body weight, respectively. A total of nine Korean native bulls of average weight of 350㎏ with 3 heads per each treatment were fed for 90 days. The experimental design was a completely randomized design. The results obtained were summarized as follows: 1. Body weight gain of T₃ (122.6㎏) was significantly higher(P$lt;.05) than other treatments. 2. Daily intake of concentrate in T₃(7.8㎏) was significantly increased(P$lt;.05) and daily intake of maize silage was also significantly increased(P$lt;:.01) in T₁(27.5㎏). Feed conversion of DCP was higher in T₁(0.05㎏) and lower in T₂(0.79㎏). However, the differences were not statistically different(P$lt;.05). Feed conversion of TDN was higher in T₃(6.96㎏) without significant difference. 3. Rumen acetate concentration was the highest (P$lt;.05) in T₁(67.50%) and the lowest in T₃(62.35%). Rumen propionate concentration in T₁, T₂ and T₃ were 16.18%, 18.96% and 23.04%, respectively. 4. Dressing percent in T₃(58.90%) was significantly increased(P$lt;.05) and lean meat percent in T₁(47.4%) was significantly increased(P$lt;.05).
이순복(Soon Bok Lee),이선미(Sun Mee Lee),조태순(Tai Soon Cho),심성보(Sung Bo Shim),윤기욱(Ki Wook Yoon),이종찬(Jong Chan Lee) 한국응용약물학회 1998 Biomolecules & Therapeutics(구 응용약물학회지) Vol.6 No.2
The dose-response effect of polysaccharide extracts(PS-1) from Artemisia iwayomogi was investigated under various hepatic disease models. Silymarin, DDB and UDCA were used as reference compounds. We found that the maximal effective dose of PS-1 was 100 mg/kg b.wt. in CCl₄-induced hepatotoxicity, D-galactosamine-induced hepatitis, in ANIT-induced cholestasis and 300 mg/kg b.wt. in CCl₄-induced chronic liver disease, 30 mg/kg b.wt. in chronic bile duct ligation and chronic ethanol fatty liver. These Findings suggest that PS-1 fraction protects the hepatocyte against various hepatic injuries, and this fracton might be of therapeutic value.
목재의 사료화에 관한 연구 Ⅰ. 암모니아 처리 나무 사일리지의 화학적 조성 및 발효특성
이순복 ( S . B . Lee ) 한국축산학회 1989 한국축산학회지 Vol.31 No.10
Pseudo acacia, lespedeza spp., quercus spp. and pueraria tunbergiana of wild shrub in the mountainous area added with concentrate(50:50,W/W), and treated with 6% ammonia water. 1. Crude protein content of ammoniated wood silage, pseudo acacia, lespedeza spp., quercus spp. and pueraria tunbergina were 18.08,15.28,15.06 and 18.24% respectively, and ammoniated pueraria tunbergiana significantly increased(p $lt;.05). 2. ADF and NDF of ammoniated wood silage was significantly decreased because of ammonia treatment and concentrate. 3. PH of ammoniated wood silage was very good fermentation characteristics (pH 3.99∼4.23). Lactic acid of pueraria tunbergiana was significantly increased (1.95%, P $lt;.05), quercus spp. significantly decreased(1.11%, p $lt;.05). 4. IVDMD of ammoniated woods silage, pseudo acacia, lespedeza spp., puercus spp. and pueraria tunbergiana was 59.18, 61.11, 57.40 and 61.35% respectively pueraria tunbergiana significantly increased and quercus spp. decreased(p $lt;.05).
목재의 사료화에 관한 연구 4 . 돈분첨가 나무사일리지의 화학적 특성 및 발효특성
이순복 ( S . B . Lee ) 한국축산학회 1992 한국축산학회지 Vol.34 No.1
Black locust, lespedeza, oaks and kudzu of wild shrub in mountainous area, Kang Won-Do province were mixed with both swine waste and commercial dairy feed (50:25:25, W/W) and treated with 6% ammonia water. Therefore, this experiment was conducted to test the practical use of wild shrub as a ruminant feed in terms of chemical composition, fermentation characteristic, in vitro dry matter digestibility (IVDMD) and energy value. The results obtained in this study are summarized as follows : The crude protein contents of shrub silage were 13.35-17.59% the content of crude protein was the highest in kudzu silage(P$lt;.05). Crude protein of black locust silage was 2.28 times higher than that of untreated black locust. The crude fiber contents of shrub silage, black locust, lespedeza, oaks and kudzu were 34.63, 34.77. 35.38 and 33.31%), respectively and they were significantly different(P$lt;.05). The ADF. NDF and NDS contents of shrub silage were 40.29-44.37. 48.23-55.44 and 44.56-51.77%. They were significantly different(P$lt;.05). The fermentation characteristics of shrub silage showed that the highest lactic acid accumulation was resulted from kudzu the lowest from lespedeza (1.38%. P$lt;.05). Therefore. the lowest pH was observed with kudzu(3.28%, P$lt;.05). The IVDMD of shrub silage. black locust. lespedeza, oaks and kudzu were 56.42, 55.42, 55.33, 52.19 and 62.69%, respectively. The content of IVDMD was the highest in kudzu(P$lt;.05), lowest in oaks(P$lt;.05). The lowest TDN was observed in oaks(52.63%), the highest in kudzu(61.10%, P$lt;.05). DE and ME contents of shrub silages were not significantly different(P$lt;,05)
이순복(Soon Bok Lee),이선미(Sun Mee Lee),조태순(Tai Soon Cho),정철(Cheol Jeong),정성학(Seong Hak Jeong),심성보(Sung Bo Shim) 한국응용약물학회 1997 Biomolecules & Therapeutics(구 응용약물학회지) Vol.5 No.2
The hepatoprotective activity of six extracts (BE, EE, HH, PS-1, PS-2, KP) from Artemisia iwayomogi was investigated against experimentally produced hepatic damages. Silymarin, DDB and UDCA were used as reference compounds. Treatment with PS-1 extract reduced hepatic demages induced by CCl₄, acetaminophen and ANIT but it did not alter ethionine-induced hepatotoxicity. In addition, PS-1 extract showed a protective effect against chronic CCl₄-induced hepatotoxicity as well as liver regeneration. PS-2 and KP extracts exhibited significant antihepatotoxic effects on D-galactosamine-induced hepatitis. Treatment with EE extract inhibited ethionine-induced fatty liver. These data indicate that the PS-1 extract is the most hepatoprotective constituent and rationalize the traditional use of this plant in hepatobiliary disorders.
이순복(S . B . Lee),정근기(K . K . Jung),배동호(D . H . Bae),정연후(Y . H . Chung) 한국축산학회 1991 한국축산학회지 Vol.33 No.2
This study was carried out to improve the quality and nutrive value of corn stover. Moisture content of corn stover was 30%o. Seven different corn stover silages added with rice bran(0, 5, 10, 15, 20, 25 and 30%) and 2% urea(DM basis) were made and moisture content of corn stover silage was 65%. After 40 days, corn stover silage added with rice bran were analyzed chemical composition, in vitro dry matter digestibility (IVDMD) and volatile fatty acid(VFA). The resurts obtained are as follow; l. When the rice bran levels were increased, crude protein and crude fat contents were increased(r-=.94**, .98**), ADF and CWC content decreased (r=-.88**, -.88**). 2. When the rice bran levels were increased in 0, 5, 10, 15, 20, 25 and 30%, lactic acids increased in 0.56a, 0.62a, 1.81b, 2.04b, 2.48bc, 3.29d%, but rice bran levels in 25 and 30% were not significant. 3. Above 5% rice bran level, NH₃-N and IVDMD were not significant. 4. When the rice bran levels were increased, propionic acids were significantly increased (p $lt;.01) but butyric acid significantly decreased (p $lt;.01). 5. Corn stover silage above 25% rice bran level result in better quality silage.
목재의 사료화에 관한 연구 3 . 계분첨가 나무 사일리지의 화학적 조성 및 발효특성
이순복 ( S . B . Lee ) 한국축산학회 1991 한국축산학회지 Vol.33 No.6
Pseudo acacia lespedeza spp.. quereus spp. and pueraria tunbergiana of wild shrub in mountainous area were added with both caged layer manure and commercial dairy Iced; (50:25:25, W/W) and treated with 6% ammonia water. 1. Crude protein contents of pseudo acacia. lespedeza spp., quereus spp. and pueraria tunbergina silage were 16,75. 13.19, 12.06 and 17.04% respectively and the content of crude protein was the highest in puerana tunbergiana silage(p$lt;.05). 2. Crude fiber of pseudo acacia. lespedeza spp., quereus spp.. and pueraria tunbergina silage were 36.47, 36.05, 37.22 and 36.96% respectively and quereus spp. had the highest amount but they did net show the significant difference(p$lt;.05). 3. pH of wood silage added with caged layer manure showed very good fermentation characteristies (pH 3.62-4.28) the content of lactic acid was the highest in pueraria tunbergiana(p$lt; .01). 4. IVDMD of wood silage added with caged layer manure, pseudo acacia. lespedeza spp., quereus spp. and pueraria tunbergiana were 58.11, 55.59, 55.14 and 60.62% respectively and the content of IVDMD was the highest in pueraria tunbergiana(p $lt;.05) and lowest in quereus spp.(p$lt;.05).