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볏짚의 사료가치 증진을 위한 적정 알카린 H2O2 처리 수준에 관한 연구
문양수(Y . S . Moon),하종규(J . K . Ha),고종열(J . Y . Ko),최연호(Y . H . Choy),조경훈(G . H . Cho),최윤재(Y . J . Choi),한인규(I . K . Han) 한국축산학회 1990 한국축산학회지 Vol.32 No.10
This study was carried out to determine the adequate levels of alkaline hydrogen peroxide treatment for the improvement of nutritive value of rice straw. In vitro digestibility and chemical analysis after several treatments were measured. Treatment variables were soaking time(12, 24, 48 and 96 hrs), temperature(5, 25, 50 and 75℃) of alkaline H₂0₂ solution, H₂0₂ concentration (0.5, 1, 2, 3 and 4%) and substrate /solution ratio (1, 2, 3, 4 and 5g/ml). The results obtained were summarized as follows. 1. The DM digestibilities or rice straw treated with H₂O₂ for 24 and 48 hours were higher than those of the others(p$lt;0.05). There was no differ ences when the rice straw was treated for 12, 72 or 96 hours. Cell wall contents were not affected by the time of treatment. 2. The DM digestibilities were higher at pH 11.5 or above(p$lt;0.05) and was decreased as pH declined. When rice straw was treated with H₂O₂ at pH 11.5 or higher, NDF, ADF and cellulose contents were increased. However, lignin content and DM recovery percentages were decreased. 3. The DM digestibilities were not influenced by the ratio of straw versus liquid. The contents of NDF and cellulose were not affected up to the ratio of 4g rice straw/50m1, but were decreased at 5g rice straw/50m1. Lignin content and DM recovery percentages, however, were increased at 5g rice straw /50m1. 4. The DM digestibilities were not different among treatments at 5, 25 and 50℃. However, the rice straw treated at 75℃ showed lowest digestibility of all treatment (p$lt;0.05). The content of NDF, ADF and cellulose was increased by increasing temperature. However, lignin content and DM recovery percentages were decreased by increasing temperature. 5. The AHP treated rice straw had higher content of ADF and cellulose, and lower content of hemicellulose and lignin as the concentration of H₂O₂, increased. But hemicellulose, lignin and DM recovery percentages were decreased. The NDF content was not different among five different concentrations of H₂0₂ solution. In conculsion, based upon the results of present experiments the most desirable method is to soak rice straw in 1% alkaline H₂0₂ solution at pH 11.5, at room temperatrve (25℃), for 24∼48 hours and at the ratio of 4g rice straw /50m1 solmtion.
대두박 , 대두유 , 생대두 및 Extrusion 처리대두 급여가 면양에 있어 반추위내 대사와 영양소의 장내이동에 미치는 영향
고종열(J . Y . Ko),하종규(J . K . Ha),이남형(N . H . Lee),성기승(K . S . Sung) 한국축산학회 1992 한국축산학회지 Vol.34 No.3
This experiment was conducted to study the effect of feeding soybean meal (SBM), soybean oil plus SBM, raw soybean (RSB) and extruded soybean (ESB) on the nitrogen (N) metabolism in the rumen, organic matter (OM) and nitrogen flow to the abomasum in lambs. Results obtained from the present study are summarized as follows: 1. Ruminal pH, NH₃-N and total volatile fatty acid (VFA) were not affected by soybean sources. Isobutyrate (P$lt;0.01), isovalerate and valerate (P$lt;0.05) were highest for RSB and lower the heat processed diets. There was no dietary effect on ruminal OM digestion and flow to the abomasum, but a consistent trend for higher OM flow with ESB diet was observed compared with RSB diet. Nitrogen retention (% intake) was not affected by treatments and ranged from 39 to 42%, and urinary N excretion was lower for ESB diet. Soybean oil supplementation to the SBM diet tended to decrease N retention. Nitrogen flow and non ammonia nitrogen (NAN) flow to the abomasum were similar among soy-bean sources. Nitrogen composition of rumen bacteria was highest for SBM diet (P$lt;0.05) and levels of essential amino acid, notably lle, Met and Phe, were tended to be higher for SBM diet. Ether extract content in abomasal whole digesta was lowest (P$lt;0.05) with SBM diet, and Met and Asp were highest (P$lt;0.05) with ESB diet.
신경망 외란관측기와 파라미터 보상기를 이용한 PMSM의 정밀 위치제어
고종선(J.S.Ko),이태훈(T.H.Lee) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
This paper presents neural load torque observer that used to deadbeat load torque observer and regulation of the compensation gam by parameter estimator. As a result, the response of PMSM follows that of the nominal plant The load torque compensation method is compose of a neural deadbeat observer To reduce of the noise effect, the post-filter, winch is implemented by MA process, is adopted. The parameter compensator with RLSM (recursive least square method) parameter estimator is adopted to increase the performance of the load torque observer and main controller The parameter estimator is combined with a high performance neural torque observer to resolve the problems As a result, the proposed control system becomes a robust and precise system against the load torque and the parameter variation. A stability and usefulness, through the verified computer simulation, are shown In This paper.