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FeMn / NiFe에서 Laser 열처리에 의한 자구연구
최상대(S. D. Choil),김선욱(S. W. Kim),진대현(D. H. Jin),이미선(M. S. Lee),안진희(J. H. Ahn),주호완(H. W.O Joo),김영식(Y. S. Kim),이기암(K. A. Lee),이상석(S. S. Lee),황도근(D. G. Hwang) 한국자기학회 2004 韓國磁氣學會誌 Vol.14 No.6
We have studied local magnetization reversal by laser annealing in exchange biased NiFe/FeMn bilayer. Local magnetization reversal was performed by using the DPSS laser under external magnetic field of 600G. When the laser illuminated the patterned film with the power of above 300 ㎽ during 15 min, a magnetoresistance (MR) curve with symmetric peaks at the opposite field was obtained due to the local reversal of exchange biasing. The direction of exchange anisotropy in the locally reversed region can be restored by local laser annealing under alternating magnetic field, even if its MR peak was reduced by the damage and interdiffusion. The magnetic domain structure of the locally reversed region was measured by MFM. The new domains were generated by laser annealing near the exposed area.
Proteomic analysis of Salmonella pullorum infected liver tissue in chicken
Urantulkhuur.B,Baatartsogt.O,H. K. Lim,S.W Suh,Y.Y Kim,C.H Lee,P.K. Mandal,K. D. Choil 한국가금학회 2008 한국가금학회 정기총회 및 학술발표회 Vol.25 No.-
Salmonellosis in poultry is a significant health problem which causes substantial economic loss. One of the common causative agents of chicken salmonellosis is Salmonella pullorum (SP). The goal of this work was to characterize and identify gene expression profiles of chicken liver tissue after infected Salmonella pullorum. In particular, this report focuses on identification of the major proteins that could be identified in Salmonella infected liver. Hundred Hy-Line layer chicks of 10 days old were divided into 5 groups of 20 each. A1, A2, A3 group were infected with high dose(3×10⁹cfu/㎖) of S.P orally and A4, A5 group were kept as non-infected control. One chick was taken randomly from each group after 0, 3, 6, 9, and 12 days and liver was collected. Proteins were separated from 6 days chicks' liver. Two-dimensional electrophoresis was done and mass spectrometry(MS) will identify the protein spots. More than 289 protein spots were detected on silver stained 2DE gels. Three new proteins were found to be expressed in the infected chicken liver. Five proteins were found to have up regulated expression in infected chicken.