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Naoto Metoki,Hironori Sakai,Yasunori Haga,Tatsuma D. Matsuda,Shugo Ikeda 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
The magnetic excitation of a narrow gap semiconductor β-US2 was studied by means of neutronscattering. At low temperatures, clear crystalline electric-field (CEF) excitations were observed,indicating the localized character of 5f electrons. The pseudo-doublet state at an excitation energyof 7 meV is consistent with the level scheme based on the 5f2 configuration of U4+ ions, whichreproduces the magnetic susceptibility, magnetization, and specific heat. At elevated temperatures,the conductivity recovers, with the excitation of 5f carriers being beyond the conduction gap of 90K. Simultaneously, the CEF excitation becomes weak and broad, and is replaced by a quasi-elasticresponse of magnetic origin, indicating a crossover of the 5f character from localized to itinerant.
Tetsutaro Yamaguchi,Akira Kawaguchi,Yong-Il Kim,Shugo Haga,Koshu Katayama,Hajime Ishida,Soo-Byung Park,Koutaro Maki,Ryosuke Kimura 대한치과교정학회 2014 대한치과교정학회지 Vol.44 No.2
Objective: A recent study suggested that rs6504340, a polymorphism within the homeobox B (HOXB) gene cluster, is associated with the susceptibility for malocclusions in Europeans. The resulting malocclusions require orthodontic treatment. The aim of this study was to investigate the association of rs6504340 and other dentition-implicated polymorphisms with dental and occlusal traits in Korean and Japanese populations. Methods: The study participants included 223 unrelated Koreans from the Busan area and 256 unrelated Japanese individuals from the Tokyo metropolitan area. DNA samples were extracted from saliva specimens. Genotyping for rs6504340 and four single nucleotide polymorphisms (SNPs) that have been shown to be associated with the timing of first tooth eruption and the number of teeth at 1 year of age (rs10506525, rs1956529, rs9674544, and rs8079702) was performed using TaqMan assays. The Index of Orthodontic Treatment Need (IOTN), overjet, overbite, arch length discrepancy, crown sizes, and length and width of the dental arches were measured. Spearman’s correlation coefficients were calculated to evaluate relationships between rs6504340 and these dental/occlusal traits. Results: We evaluated the aesthetic components and dental health components of the IOTN in the Korean and Japanese populations and found that neither rs6504340 nor the other four SNPs showed any association with dental and occlusal traits in these East Asian populations. Conclusions: These negative results suggest that further research is needed to identify the genetic determinants of malocclusions in order to reach a consensus.