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한국산 물두꺼비(Bufo stejnegeri : 무미목 , 두꺼비과)염색체의 인형성부위에 대한 개체간 및 개체내 변이
이혜영,박창신 한국유전학회 1989 Genes & Genomics Vol.11 No.3
The distribution of the nucleolus organizer regions (NORs) on the chromosomes of 10 individuals of Bufo stejnegeri (Anura, Bufonidae) was investigated by conventional and NORs-staining analysis. 1. Seven individuals exhibit one pair of NORs on the long arm of the chromosome pair 6 (standard form). 2. The one individual had a pericentric inversion on chromosome bearing NORs, whereby a large part of the NORs translocated in an telomeric position on the short arm. Therefore, a trace of original NORs remained an original terminal position on the long arm. Only one of the largest homologues had additional small NORs in the interstitial region of short arm. The possible explanation is the mechanism of translocation and segmentation (or fragmentation) in the NORs cluster (varied form I). 3. The two individuals exhibit inter- and intraindividual variation in number, position and size of the NORs. The mechanisms of these variation were explained by translocation and segmentation (or fragmentation) of NORs (varied form II).
Structural and Electronic Properties of an Alkali Fulleride, $Rb_1C_{60}$
이혜영,정동운,Lee, Hye Yeong,Jeong, Dong Un Korean Chemical Society 1996 Bulletin of the Korean Chemical Society Vol.17 No.1
Structural and electronic properties of an alkali metal fulleride, Rb1C60, was studied. In spite of the chain structure with shortdistance between balls along the crystallographic a-direction, the electronic structure calculation study with the X-ray defined crystal structure shows that Rb1C60 is a three-dimensional metal at room temperature. This result is different from the magnetic experiments in which the compound was found to behave as a quasi-one-dimensional metal. Partial Fermi surface nesting is supposed to be the reason for the metal-insulator transition found in Rb1C60 at ∼50 K.