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밀짚 기본사료 급여시 HCHO 처리 Alfalfa 엽(葉) 분미의 보충이 면양의 반추위액(反芻胃液) 성장에 미치는 영향
강희신,R. H. Weston 한국낙농학회 1985 韓國酪農學會誌 Vol.7 No.2
밀짚 基本飼料로 飼育되는 緬羊에게 HCHO 4.37% 水準의 處理 Alfalfa 葉 粉末 및 無處理 粉末의 補充時 反芻胃液의 性狀을 調査하여 다음과 같은 結果를 얻었다. 1. 處理 Alfalfa 葉 粉末의 補充은 反芻胃內 NH₃態 窒素濃度를 約 17% 相當 減少시키며, 蛋白質의 減成化를 充分히 抑制하고 있음을 알게 되었다. 2. Alfalfa 葉 粉末의 HCHO處理效果는 飼料攝取后 1.5時問 以內 또는 그 直前后까지 持績되나 2.5時間까지는 維持되지 않는다. 3. 反芻胃液中 總酸 및 個別脂肪酸의 濃度는 n-Valerate의 경우 飼料 攝取后 0.5時間 Isovalerate의 경우 2.5時間 境遇를 除外하고 差異가 없다. 卽 n-Valerate는 HCHO處理로서 減少되나 Iso-Valerate는 오히려 增加된다. 4. 反芻胃液中 NH₃-N 및 VFA에 對한 時差別 變異(增減)에 對한 回歸分析의 結果로서 數個의 同歸方程式을 誘導하고 그 可能性에 對하여 討論되었다. To study the ruminal status of the sheep fed the basal diet of wheaten chaff mixture supplemented with and without HCHO treated alfalfa leaf meals at the level of 4.37% of the crude protein content of the meal, four Border Leicester x Merino male sheep fitted with ruminal cannulae were kept in the metabolism cages and fed by using continuously rotating feeder for three hours intervals according to the switch over design. The results obtained were summarized as follows; 1. The ruminal ammonia N concentration (mg N) of sheep supplemented with the HCHO treated alfalfa leaf meal was significantly (p<0.05) reduced by about 17.0% compared to that of untreated group. 2. The reduction in ammonia N concentration was lasted for up to 1.5 hours after feeding with HCHO treated meal supplementation, but this effect was not found by 2.5 hours after feeding. 3. The effect of HCHO treated alfalfa leaf meal supplement on the ind. VFAs of ruminal fluid showed that there was a significant (p<0.05) reduction in the n-valerate concentration at 0.5 hours after feeding, whereas the iso-valerate was increased at 2.5 hours after feeding. 4. Several regression equations were derived from the concentration of ammonia N and volatile fatty acids by hour intervals after feeding. Possible reasons for these were discussed in some details.
3차원 레이저 스캐너를 이용한 인쇄롤 가공에 관한 연구
강희신,노지환,손현기,Kang, Heeshin,Noh, Jiwhan,Sohn, Hyonkee 한국레이저가공학회 2013 한국레이저가공학회지 Vol.16 No.4
The research for the development of roll-to-roll printing process is actively underway on behalf of the existing semiconductor process. The roll-to-roll printing system can make the electronic devices to low-cost mass production. This study is performed for developing the manufacturing technology of the printing roll used in the printing process of electronic devices. The indirect laser engraving technology is used to create printable roll and the printable roll is made out of the chrome coated roll after coating copper and polymer on the surface of steel roll, ablating the polymer on the surface of roll and etching the roll. The 3 dimensional laser scanner and roll rotating systems are constructed and the system control program is developed. We have used the fiber laser of 100 W grade, the 3 dimensional laser scanner and the 3 axes moving stage system with a rotating axis. We have found the optimal conditions by performing the laser patterning experiments and can make the minimum line width of $24{\mu}m$ by using the developed 3 dimensional laser scanner system.
In vitro 방법에 의한 Alfalfa 엽 분미의 HCHO 처리 효과 실험
강희신,John R. Ashes 한국낙농학회 1985 韓國酪農學會誌 Vol.7 No.2
三年餘 貯藏되었던 Alfalfa 葉 粉末에 ^(14)C-HCHO를 其 合有 蛋白質의 0, 0.5, 1.0 및 2.0% 水準으로 處理하였을 때의 in vitro 減成化度를 測定하였는 바 다음과 같은 結果를 얻었다. (1) In vitro 蛋白質 減成化度는 12.7∼1.1%의 範圍에 있었으며 HCHO處理 水準 0, 0.5, 1.0, 및 2.0% 水準에 따라 각각 12.7, 12.0, 7.9 및 1.1%의 減成化度를 나타내었다. (2) HCHO의 處理는 醱酵 Tube內 溶液中의 揮發性 脂肪酸 濃度에 影響을 미치지 않았다. (3) ^(14)C-HCHO의 回收率은 平均 72.3%로서 基質의 蛋白質과 HCHO가 잘 結合되고 있음을 알게 되었다. In order to test the efficacy of HCHO treatment on alfalfa leaf meal for protecting its protein from degradation in in vitro fermentation, aged alfalfa leaf meal for about three years was treated by ^(14)C-HCHO at the level of 0, 0.5, 1.0 and 2.0% of protein content of the raw material and the protein degradability was measured with the amount of NH₄-N (㎎) over the total nitrogen presented per test tube after 24 hours incubation by using and incoculum collected from the sheep fed alfalfa pellet. The results obtained were summarized as follows; 1. The protein degradabilities measured were 12.7, 12.0, 7.9 and 1.1% for the ^(14)C-HCHO levels of 0, 0.5, 1.0 and 2,0% respectively. 2. No differences between treatments were found in the VFA concentration of the fermentation fluids in the tubes. 3. The recovery rates of protein bound formaldehyde from the treated alfalfa leaf meals were averaged 72.3%.