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Magnetic Property of a Single Crystal of Spin-1/2 Triple-chain Magnet Cu3(OH)4SO4
Yutaka Fujii,Yuya Ishikawa,Hikomitsu Kikuchi,Yasuo Narumi,Hiroyuki Nojiri,Shigeo Hara,Hirohiko Sato 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
The spin-1/2 triple-chain magnet Cu3(OH)4SO4 (mineral name: antlerite) is a candidate ‘idlespin’system. In order to study the phase transitions in this compound in detail, we have performedspecific-heat measurements under magnetic fields up to 10 T and in the temperature range downto 1.9 K and proton nuclear magnetic resonance (1H-NMR) experiments with single crystals. Wefound at least three successive phase transitions at zero field around 5 K which strongly dependon the value and the direction of the applied field. Another transition around 3 K was also found. 1H-NMR spectra in a low-temperature and low-field ordered phase indicated an antiferromagneticcommensurate spin structure with at least four sublattices, which is discussed in connection withthe idle-spin state. Phase diagrams show a richness of magnetic phases for this compound.
이은송,Mohammad Musharraf Uddin Bhuiyan,Hiroyuki Watanabe,Kohji Matsuoka,Yoshihiro Fujise,Hajime Ishikawa,Yutaka Fukui 대한수의학회 2009 Journal of Veterinary Science Vol.10 No.4
In this study, we examined the feasibility of using subzonal cell injection with electrofusion for interspecies somatic cell nuclear transfer (iSCNT) to produce sei whale embryos and to improve their developmental capacity by investigating the effect of osmolarity and macromolecules in the culture medium on the in vitro developmental capacity. Hybrid embryos produced by the electrofusion of fetal whale fibroblasts with enucleated porcine oocytes were cultured in modified porcine zygote medium-3 to examine the effects of osmolarity and fetal serum on their in vitro developmental capacity. More than 66% of the whale somatic cells successfully fused with the porcine oocytes following electrofusion. A portion (60∼81%) of the iSCNT whale embryos developed to the two- to four-cell stages, but no embryos were able to reach the blastocyst stage. This developmental arrest was not overcome by increasing the osmolarity of the medium to 360 mOsm or by the addition of fetal bovine or fetal whale serum. Our results demonstrate that sei whale-porcine hybrid embryos may be produced by SCNT using subzonal injection and electrofusion. The pig oocytes partly supported the remodeling and reprogramming of the sei whale somatic cell nuclei, but they were unable to support the development of iSCNT whale embryos to the blastocyst stage.