Proceedings of the Japan Academy, Series B

HCN in a Hydrogen-deficient Carbon Star, HD 137613

Yoshio FUJITA

1990 Volume 66 Issue 5 Pages 85-90
Published: 1990
Released on J-STAGE: October 13, 2006

DOIhttps://doi.org/10.2183/pjab.66.85

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In the spectral region from λ7870 to λ8000 of HD 137613, a hydrogen-deficient carbon star, some lines of the 3ν₁+2ν₃, 4ν₃, and ν₂+4ν₃-ν₂ Sequences of HCN were identified without any blending effects. These observational results seem to be in agreement with the theoretical work by Jørgensen.

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Formation of Boron-mannitol Complex in the Hydrofluoric Acid Solution and a Possibility of the Use of Acids in the Separation of Boron from the Natural Rock Samples

Tsuyoshi ISHIKAWA, Eizo NAKAMURA

1990 Volume 66 Issue 5 Pages 91-95
Published: 1990
Released on J-STAGE: October 13, 2006

DOIhttps://doi.org/10.2183/pjab.66.91

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Volatilization and mass fractionation of boron during evaporation of the hydrofluoric and hydrochloric acid solutions were investigated with varying mannitol/boron ratios. The degree of volatilization and mass fractionation decreases with increasing mannitol/boron mol ratio and the boron volatilization is completely suppressed when the ratio is more than unity. These results indicate that the final stable compound of boron-mannitol complex is an equimolar complex of boron and mannitol. The formation of this complex allows the use of hydrofluoric and hydrochloric acids for the dissolution of silicate rock samples and for separation of boron from the samples adopting anion exchange chromatography in F^- form.

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Molecular Shape of Dystrophin Purified from Rabbit Skeletal Muscle Myofibrils

Takashi MURAYAMA, Osamu SATO, Sumiko KIMURA, Teruo SHIMIZU, Hajime SAW ...

1990 Volume 66 Issue 5 Pages 96-99
Published: 1990
Released on J-STAGE: October 13, 2006

DOIhttps://doi.org/10.2183/pjab.66.96

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Dystrophin, the product of Duchenne muscular dystrophy (DMD) gene, was purified to 70-80% homogeneity from rabbit skeletal muscle myofibrils by hydroxylapatite, wheat germ agglutinin-agarose, and DE 52 column chromatography. Rotary shadowed image of dystrophin molecules was dumpbell-shaped dimer, 100-120nm long. There were frequently linear aggregates of the dumpbell dimer.

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