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김근수,추고연,김태환,성재석,이용택,오숭호,이민수,최호상 한국공업화학회 2003 응용화학 Vol.7 No.1
Zeolite membrane was produced by hydrothermal synthesis on α ̄alumina substrate using clear solution method. Zeolite membrane can separate liquid phase reactants like a water/mehtanol system. The compogition ratio of raw materials. 90 Na_2O : 1 Al_2O_3 : 9 SiO_2 : 5760 H_2O was used for preparation of zeolite membrane. The deposition states of zeolite crystal on alumina substrate by change of aging time were analysed through XRD and SEM.
Hien, T.B.D.,Maeng, J.H.,Lee, B.H.,Seong, G.H.,Choo, J.,Lee, E.K. Elsevier Science Publishers 2012 Journal of biotechnology Vol.161 No.3
Phage display was performed against human IgG (hIgG) through five rounds of 'biopanning'. Each round consisted of: (1) incubating a library of phage-displayed 12-mer peptides sequences on hIgG-coated magnetic beads, (2) washing the unbound phages, and (3) eluting the bound phages. The eluted phages were either amplified to enrich the pool of positive clones or subjected to the next round without amplification. Through ELISA, four clones (F9, D1, G5, and A10) showing specific binding affinity to hIgG were identified. Among these, F9 had the highest affinity (K<SUB>d</SUB>=6.2nM), only one order of magnitude lower than the native anti-hIgG antibody (0.66nM). Following the DNA sequences of the selected clones, four 12-mer peptides were chemically synthesized. Among them, D1 peptide showed the highest binding affinity to hIgG via SPR biosensor measurements. This peptide was conjugated to biofunctionalized magnetic beads, and its immuno-binding ability was compared with that of the native antibody immobilized to magnetic beads. The mol-to-mol binding efficacy of the peptide-coated magnetic beads was approximately 1000-fold lower than that of the antibody-coated magnetic beads. Our results suggest a feasibility of using antibody-mimicking peptides identified by phage display technique for immuno-magnetic separation of an antigen.
레이저 플리즈마에서의 연엑스선 레이저의 이득에 관한 연구
이태동,추한태,김규욱 금오공과대학교 2006 論文集 Vol.27 No.-
티타늄 플라즈마 속의 Ne 형 이온에 대하여 충돌여기 방식에 의한 3p→38 전이 엑스선 레이저의 이득의 시간에 따른 변화를 총이온밀도, 전자온도 및 온도 상승시간 등의 다양한 값에 대하여 수치계산 하였다. 얻을 수 있는 최대 이득은 총이온 밀도가 높을수록, 전자온도가 높을수록 증가하였다. 총이온밀도 5x10^(18) cm^(-3) 이상, 최고 온도 200eV 이상인 조건에서 10 이상의 이득을 얻을 수 있었다. 온도의 상승시간이 주는 영향은 그리 크지 않은 것으로 나타났다. 이 수치계산에는 플라즈마의 밀도 및 온도의 공간적 구배가 고려되지 않았다는 점에서 실제 엑스선레이저의 실험적 상황과는 다르다는 한계를 지니지만, 결과로 얻은 국소적 온도 및 밀도와 순간이득 사이의 관계는 엑스선 레이저 실험 설계에 참고자료로 활용될 수 있으리라 사료된다. The collisionally pumped soft X-ray laser gain In laser-produced Ne-like Titanium plasma was studied by numerical computation. The achievable laser gain increases with the total ion density and peak electron temperature. To obtain the gain value greater than 10, the total ion density should be greater than 5x10^(18) cm^(-3) and the peak electron temperature should be higher than 200eV. The gain increases as the risetime of electron temperature increases, but the effect is not significant.