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김태옥,조종수,윤승락 한국목재공학회 1992 목재공학 Vol.20 No.4
This study was carried out to improve the method of tapping sap from Betula platyphylla Sukatschev, Betula costata Trautv., Betula schmidtii Regel, Betula davurica Pallas, Betula ermanii Cham, Acer mono Maxim and Acer pseudo-sieboldianum Kom and to use it to natural drinks. The major results are as follows : 1. It is no difference of the amount of sap by tapping methods and species of trees. The larger D. B. H. is, the more amount of sap can be gotten. So we thought that the best tapping method is hole-drilling to prevent trees from damage. 2. Sap contains sugars and mineral materials. Birches have glucose and fructose, much more mineral materials than maples. Sugar of maples is mainly sucrose. 3. We assume that mineral materials of birches are effective to urination, to makea stong dody and sucrose of maples is effective to recover from one's fatigue by controlling the blood sugar. 4. In vacuum packing after sterilizing the sap in low temperature, it could be stared more 1 year. So, it is possible that sap will be commercialized.
미하일 박 소설에 투영된 고려인 주인공의 자아정체성 고찰: 『밤은 태양이다』를 중심으로
김태옥 한국슬라브․유라시아학회 2023 슬라브학보 Vol.38 No.4
Most of the domestic studies and discussions on Mikhail Park have centered on issues of subjectivity, diaspora, language, and the identity of the protagonist as a ethnic Korean writer. In Mikhail Park's works, we find a unique and special literary environment related to the Koryo-saram protagonist and the history of the Koryo-saram in Russia and Central Asia, but at the same time, the reality of the former Soviet Union and post-Soviet Russia and Central Asia and the universality and individuality of the author are secured, independent of region, ethnicity, and time. This paper comprehensively examines the spatial and temporal analysis of the works in Night is the Sun, the identity of the protagonist, and the ideas and beliefs about art that the author wants to show through such a protagonist. Mikhail Park is a author who consistently features Korean protagonists in his work, demonstrating an awareness of Korean history and roots. One of the things that must be considered with him is that he is a Russian artist who grew up and works in the former Soviet Union and Russia, so there is a need to expand the acceptance of his work and his world from Korean to global.
교반조에서 비혼화성 액상 ( n - 헥산 / 물 ) 계의 액 - 액분산
김태옥,김동욱,전종한 ( Tae Ok Kim,Dong Uk Kim,Jong Han Chun ) 한국공업화학회 1993 공업화학 Vol.4 No.3
N-헥산과 증류수로 이루어진 비혼화성 액상계에서 교반에 의한 액-액분산을 해석하였다. 교반기는 blade형태가 flat, 60mesh와 40mesh의 금망, 그리고 60mesh금망의 외부에 금속띠를 두른 4가지의 6-bladed turbine 교반기를 사용하였다. 실험결과, 동일한 교반속도에서 유기상의 분산정도와 교반기의 소요동력은 blade형태가 flat>solid edged>60mesh>40mesh의 순서이었으며 유기상의 부피비가 증가할수록 완전분산에 필요한 최소교반속도가 증가되었다. 또한 분산상의 액적의 평균직경은 교반속도의 증가에 따라 감소하였으며 동일한 교반속도에서는 solid edged<flat<60mesh<40mesh의 순서이었다. 완전분산에서 최소소요동력은 blade형태에 무관하게 거의 동일하였으나 금속띠를 두른 금망의 교반기가 가장 작고 균일한 크기의 액적으로 분산되어 우수한 액-액분산의 성능을 나타내었다. 이때 난류영역에서 Power number는 Reynolds number에 무관하게 일정하였고 액적의 Sauter평균직경(d_(32))은 다음과 같이 유기상의 부피비(Φ)와 Weber number(N_(We))의 함수로 나타낼 수 있었다. d_(32)/D=a(1+bΦ)N_(We)^(-0.6) The effect of agitation on liquld-liquid dispersion was investigated in an immisible liquid phase(n-hexane/water) system. Four different types of six-bladed turbine impellers were used: a flat blade, two screen blades and a solid edged 60 mesh screen blade. We found that the extent of dispersion of organic phase and power consumption of agitator were decreased in the order of flat, solid edged, 60 mesh, and 40 mesh blades at same agitation speed. And the minimum agitation speed for complete dispersion of organic phase was increased with increasing volume fraction of organic phase. Also, mean diameter of liquid droplets of dispersed phase was decreased with increasing agitation speed and it was increased in the order of solid edged, flat, 60 mesh, and 40 mesh screen blades at same agitation speed. At complete dispersion, the minimum power consumption was not vary significantly with impeller blade types, but the solid edged screen blade impeller gave the smallest and uniform sizes of liquid droplets, and it had a good performance for liquid-liquid dispersion. In this condition, Power number was not affected by Reynolds number and it was constant in turbulent flow region, and Sauter mean diameter(d_(32)) of liquid droplets was expressed as a function of volume fraction of organic phase(Φ) and Weber number(N_(We)) as follows: d_(32)/D =a(1+bΦ)N_(We)^(-0.6)