アモルファス Ｇｄ67Ｎｉ33 ゴウキン ノ キョクショ コウゾウ : シンクロトロン ホウシャコウ ニヨル EXAFS ソクテイ

We report studies on an amorphous Gd67Ni33 alloy using extended X-ray absorption fine structure(EXAFS)measurements The following results about the local structure around a Gd atom are obtained from analysis for EXAFS spectra of LIH absorption edge of Gd. The Gd atom has 13.6 nearest neighbor atoms which consist of 9.2 Gd atoms and 4.4 Ni neighbors. The number of neighbors is slightly larger than 12 atoms in the face centered cubic structure. Two sorts of Ni atoms, wich show different inter atomic distance, are located around Gd

Studies on magnetism and structure of materials for more than forty years

I present my research history that I have investigated the magnetism and the structure of electronic materials for more than forty years since entering graduate school. They are the 3d transition metals and alloys, especially Invar alloys in crystalline and amorphous phases, 4f rare earth alloys and diluted magnetic semiconductor oxides. I have used a lot of techniques such as magnetization,XRD, XAFS, XMCD and mechanical milling. I also tell much of the stories of that time in my life

Sequencing and cloning of the cDNA of guinea pig eosinophil major basic protein

AbstractMajor basic protein (MBP) purified from guinea pig eosinophils elicited histamine release from rat peritoneal mast cells at concentrations higher than 3 μg/ml both in the presence and in the absence of extracellular Ca2+. After reverse-phase high-performance liquid chromatography, it was revealed that MBP was composed of two different proteins with quite similar molecular weights and pl values, although the amino acid compositions were slightly different. The partial amino acid sequence of one of these MBPx was determined and the primers for the polymerase chain reaction (PCR) were synthesized according to the partial amino acid sequence. Using these primers and the cDNAs obtained from guinea pig eosinophils, the PCR was carried out in order to synthesize the hybridization probe of MBP for screening the cDNA library. After screening with 8 × 103 clones, a positive clone, which encoded a full length of pre-proMBP, was obtained. According to the sequencing data of this clone, it was revealed that pre-proMBP was composed of 3 domains; signal peptide, acidic domain and mature MBP. The predicted pI value of mature MBP was 11.7, though that of proMBP was 7.8. The homology in the amino acid sequence between guinea pig proMBP and human proMBP was 49.4%, while guinea pig mature MBP was more homologous (58%) to human mature MBP