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Kim, Y.I.,Park, S.J.,Kwon, H.I.,Kim, E.H.,Si, Y.J.,Jeong, J.H.,Lee, I.W.,Nguyen, H.D.,Kwon, J.J.,Choi, W.S.,Song, M.S.,Kim, C.J.,Choi, Y.K. Elsevier Science 2017 INFECTION GENETICS AND EVOLUTION Vol.53 No.-
<P>During the outbreaks of highly pathogenic avian influenza (HPAI) H5N6 viruses in 2016 in South Korea, novel H5N8 viruses were also isolated from migratory birds. Phylogenetic analysis revealed that the HA gene of these H5N8 viruses belonged to clade 2.3.4.4, similarly to recent H5Nx viruses, and originated from A/Brk/Korea/Gochang1/14(H5N8), a minor lineage of H5N8 that appeared in 2014 and then disappeared. At least four reassortment events occurred with different subtypes (H5N8, H7N7, H3N8 and H10N7) and a chicken challenge study revealed that they were classified as HPAI viruses according to OIE criteria. (C) 2017 Elsevier B.V. All rights reserved.</P>
Park, S.D.,Kim, H.J.,Park, B.J.,Han, Y.H.,Jun, B.H.,Lee, J.S.,Kim, C.J. North-Holland 2011 Physica. C, Superconductivity Vol.471 No.21
The effect of calcium doping on the superconducting properties of top seeded melt growth (TSMG) processed Y<SUB>1.5</SUB>Ba<SUB>2-x</SUB>Ca<SUB>x</SUB>Cu<SUB>3</SUB>O<SUB>y</SUB> superconductors was studied in terms of calcium content (X<SUB>ca</SUB>). YBa<SUB>2-x</SUB>Ca<SUB>x</SUB>Cu<SUB>3</SUB>O<SUB>7-δ</SUB> (X<SUB>ca</SUB>=0, 0.005, 0.01, 0.02, 0.04, 0.1, 0.3) powders were synthesized by the powder calcination method. YBa<SUB>2-x</SUB>Ca<SUB>x</SUB>Cu<SUB>3</SUB>O<SUB>7-δ</SUB> powders were mixed with 0.25mole Y<SUB>2</SUB>O<SUB>3</SUB> powder and 1wt.% CeO<SUB>2</SUB> as Y<SUB>2</SUB>BaCuO<SUB>5</SUB> (Y211) refiner, and finally made into Y<SUB>1</SUB>.<SUB>5</SUB>Ba<SUB>2-x</SUB>Ca<SUB>x</SUB>Cu<SUB>3</SUB>O<SUB>y</SUB> (Y1.5)+1wt.% CeO<SUB>2</SUB> composition. The single Y123 growth on the top surface was observed up to X<SUB>ca</SUB>=0.1, while the multiple Y123 growth was observed at X<SUB>ca</SUB>≥0.1. The superconducting transition temperature (T<SUB>c</SUB>) and critical current density (J<SUB>c</SUB>) of TSMG processed Y1.5 samples were inversely proportional to X<SUB>ca</SUB>. The Y211 size increased with increasing X<SUB>ca</SUB> due to the enhancement of Y211 coarsening by calcium doping. No Y211 refining effect by CeO<SUB>2</SUB> was observed in the calcium doped samples. The T<SUB>c</SUB> and J<SUB>c</SUB> decrease by calcium doping are likely to be due to the calcium incorporation with the Y123 lattice and formation of coarse Y211 particles.
Rat H - Y 항체에 의한 생쥐 Embryo 의 성 조절에 관한 연구 Ⅲ. H - Y 항혈청에 의한 BALB c 생쥐 상실배의 성 판별
정장용(J . Y . Jeung),박충생(C . S . Park),박희성(H . S . Park) 한국축산학회 1989 한국축산학회지 Vol.31 No.10
This experiment was carried out to develop a new technique by identifying XX-bearing embryos prior to implantation by immunological method. H-Y antiserum was prepared in inbred Wistar female rats by repeated immunization with spleen cells from males of the same strain. The reactivity of H-Y antibody was confirmed by culturing mouse embryos in the medium containing H-Y antiserum and complement obtained from the guinea pig. The optimal condition for the activity of H-Y antibody was also investigated by culturing embryos under the various conditions of equilibration times, complement concentrations and various media. The results obtained in this experiment are as follows: When the embryos were cultured in the medium of H-Y antiserum and complement which was given the equilibration time of less than 30 minutes in CO₂ incubator, the lysis-rate of embryo was 89.3%. The embryo lysis-rates in the equilibration time of 1-1.5, 3-3.5, or 24-26 hours were 48.1, 47.7 and 48.2%, respectively. When the concentration rate of complement to H-Y antiserum varied from 0.25 - 4.0, the lysis-rate of embryo was 43.2 to 52.7%. The concentration rate of complement did not influence the lysis-rate of embryos. The meda of D-PBS + 0.3% BSA, D-PBS + 20% FCS, Ham`s F-10 + 0.3% BSA and Ham`s F-10 + 20% FCS showed the embryo lysis-rate of 46.4, 57.4, 49.3 and 49.1%, respectively. The culture media used in this experiment did not show any significant difference in the embryo lysis-rate. After the embryos were cultured to the late blastocyst in the media of D-PBS + NGPS + H-Y antiserum or D-PBS + NGPS + normal female rat serum the normally developed embryos were selected and transferred to the pseudo pregnant recipients. The percentages of their female offspring were 82.3%(14/17) in H-Y antiserum treatment and 53.6%(15/28) in normal serum treatment and showed a significant difference between the two treatments(p $lt;0.001).