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단백질 소수성 측정 방법에 관한 연구 형광법 및 소수성 분획법
김성구,이삼빈,이철호 ( Sung Koo Kim,K . B . Song,Y . C . Choi,S . K . Rhee,M . H . Han ) 생화학분자생물학회 1985 BMB Reports Vol.18 No.2
The effective hydrophobicity of different proteins, BSA, lysozyme, α-chymotrypsin, trypsin, β-lactoglobulin, myoglobin, ovalbumin, casein, soybean protein 7S and 11S fractions, rapeseed protein isolate, were determined by fluorometric method using ANS as chromophore and hydrophobic partitioning technique using polyethylene glycol) and PEG-palmitate bi-phasic system. The optimum excitation and emission wave lengthes for the measurement of relative fluorescence intensity of protein-ANS complex were 380 ㎚ and 465 ㎚, respectively. The relative intensity was influenced by the concentration indicating high level of hydorphobicity, whereas those of ovalbum and soybean protein 11S fraction were low. The hydrophobic partition coefficient (△logK) gave similar results as shown in fluorometric method. The △log K of BSA and casein were 1.625 and 1.660, respectively, while those of ovalbumin and soybean 11s fraction were 0.216 and 0.170. The changes in the effective hydrophobicity of proteins in solutions at different pH, ionic strength and heat treatment, could be related to the structural characteristic of the proteins.
액체로켓 엔진 연소장치 개발에 있어서의 전산유체역학 적용 사례
조미옥(M. Joh),김성구(S.-K. Kim),한상훈(S.H. Han),최환석(H.-S. Choi) 한국전산유체공학회 2013 한국전산유체공학회 학술대회논문집 Vol.2013 No.5
This paper provides a brief introduction to application examples of the computational fluid dynamics to development of combustion devices for domestic liquid-propellant rocket engines. It is demonstrated that multi-dimensional flow analysis and multi-disciplinary combustion/cooling performance analysis can be effectively applied to provide key information on some performance-related design issues for thrust chambers and gas generators. Efforts are being made to understand complex physical phenomena inside these combustion devices, especially near the injection plate, by resolving mixing/combustion characteristics of LOX/kerosene with taking the geometry of liquid-liquid coaxial swirl injectors into consideration.