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여러 가지 첨가제가 맥주빅과 베지밀박의 부패방지에 미치는 영향
이현준(H.J. Lee),김현섭(H. S. Kim),전병순(B. S. Jeon),김상우(S. W. Kim),기광석(K. S. Ki),조훌단(K. K. Cho),조재순(J. S. Cho),이홍구(H. G. Lee),최윤재(Y. J. Choi) 유기성자원학회 2002 유기물자원화 Vol.10 No.3
고수분유기성 물질인 맥주박 베지밀박 등의 농산가공부산물들은상온에서 변패성이 강하여 가축의 사료로 이용하기위해서는 보관성증진을 위한 첨가제의 처리가 중요하다. 본 연구에서는 맥주박과 베지밀박을 소금,유기산,발효미생물 및 메치오닌수산화물(MHA)을 처리하여 고옹다습한 7 월중순경에 상온에서 20 일간 방치한 후 보관일수에 따른 시료의 표면연화현상과 곰팡이 발생양상,시료내부 pH, 암모니아태 질소 함량변화를 조사하여 각첨가제의 시료에 대한 변패방지효과를 비교한 결과 MHA 5%이상 처리구에서 특별한 효과가 있는 것으로 나타내었다. This experiment was carried our to evaluate supplemental effects of various prervatlves to preserve the Brewers grain and Soymilk from decay and degenerarion. The NaCl, organic acid(Ca-propionate), microbial fermenter(H/MF inoculant), and methionine hydroxy analogue(MHA) were used as additives in order to ∞mpare preservability of brewers grain and soymilk by-product during 20 days at July to August. Most treatments were appeared rapid decay and degeneration as soften and covered with molds on surface from the early days of experiment. However, MHA treatments showed any change until 20 days of storage. In terms of pH and NH3-N contents, only MHA treatment showed a stable and low value. The other treatments including Control showed high values as time flowed or unstable states. In conclusion, when high moisture agricultural by-product was treated by over 5% of MHA, there was no significant physicochemical changes in long term preseπation over 20 days at summer season
김현섭(H. S. Kim),이택민(T. M. Lee),김동수(D. S. Kim),최병오(B. O. Choi),김광영(K. Y. Kim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
The structures of airplane consist of sheet metal part, heavy machined part, and so on, which generate enormous amounts of cutting chip when these parts are machined. The cutting chip detoriorates the part quality and production efficiency. Therefore, cutting chip collecting apparatus is necessary for better quality and efficiency. In this study, blowing type cutting chip collecting apparatus was newly proposed and the concept design of the apparatus was examined through numerical analysis. Computations using the mass-averaged implicit 2D Navier-Stokes equations are applied to predict the nozzle flow field. The standard k-e turbulent model are employed to close the governing equations. Consequently, this study shows that the suggested blowing type cutting chip collecting apparatus can be alternative to existing expensive chip collecting apparatus.
고령지 지역 두과목초의 (荳科牧草) 적응성에 관한 연구 Ⅱ. 경사방향 및 파종시기가 서로 다른 혼파초지의 건물수량에 미치는 영향
김현섭(H . S . Kim),김무남(M . N . Kim) 한국축산학회 1989 한국축산학회지 Vol.31 No.12
This experiment was carried out to investigate the effect of slope exposure and sowing season on the dry matter yield of three different legume-grass mixtures at alpine area. The experiment was allocated as a split plot design with three replications on the south-and north-facing slope. The main plots were sowing season, spring and fall, and subplots were alfalfa-, red clover-, and white clover-grass mixture. The experiment was undertaken over a period of 35 months from April. 1986 to October. 1988. The results obtained are summerized as follows: 1. Total DM yield and DM yield of legume according to slope exposure were higher on the south-facing slope than on the north-facing slope. 2. Total DM yield and DM yield of legume according to sowing season were higher in spring than in fall. 3. Total DM yield according to mixture was the highest in redclover-grass sward regardless of slope expourse and sowing season, but DM yield of legume in white clover-grass sward.
김현섭(H. S. Kim),이동훈(D. H. Lee),김희동(H. D. Kim) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
This paper depicts the weak shock wave propagating inside some kinds of double pipe bends. Computational work is to solve the two-dimensional, compressible, unsteady Euler Equations. The second-order TVD scheme is employed to discretize the governing equations. For computations, the incident normal shock wave is assumed at 2D upstream of the pipe entrance. and its Mach number is changed between 1.1 and 1.5. The present computational results clearly show the shock wave reflection and diffraction occurring in the: double pipe bend. In particular, the vortex generation, which occurs at the edge of the bend, and its shedding. mechanism are discussed in detai1s
고령지 지역 두과목초의 (荳科牧草) 적응성에 관한 연구 Ⅰ. 경사방향 (傾斜方向) 및 파종시기가 (播種時期) 서로 다른 혼파초지의 (混播草地) 두과구성비율에 미치는 영향
김현섭(H . S . Kim),김무남(M . N . Kim) 한국축산학회 1989 한국축산학회지 Vol.31 No.12
This experiment was carried out to investigate the effect of slope exposure and sowing season on percentage of legume of three different legume-grass mixtures at alpine area. The experiment was allocated as a split plot design with three replications on the south-and north-facing slope. The main plots were sowing season, spring and fall, and subplots were alfalfa-, red clover-, and white clover-grass mixture. The experiment was undertaken over a period of 35 months from April, 1986 to October, 1988. The results obtained are summerized as follows: 1. The percentage of legume was far higher on the south-facing slope than on the north-facing slope. 2. The percentage of legume of fall-sown sward in 1988 considerably decreased compared with that in 1987, but that of spring-sown sward increased. 3. Spring-sown red clover and white clover could grow on the south-facing slope. 4. No selected legumes could grow on the north-facing slope regardless of sowing season.