The wavelengths, intensities, and identifications of about 5, 000 lines in the spectrum of the coolest Ball star HD 121447 from 4215A to 6720A have been completed. Radial velocities were determined for ten spectrograms of HD 121447. HD 121447 seems to be a radial velocity variable, and may be a binary.
The wavelengths, intensities, and identifications of about 3, 700 lines in the spectrum of the CS star R CMi from 4180A to 6720A have been completed. Atomic lines are predominant in R CMi. The molecular bands observed in R CMi are not different but much weaker than in the cool carbon stars.
Isotopic compositions of Pb, Sr and Nd have been determined for island arc basalts from northeastern Japan. The Sr and Pb isotopic ratios decrease, and Nd isotopic ratios increase from the volcanic front towards the back-arc side. The isotopic compo sition sat the most back-arc side are nearly identical to those of MORB, indicating that the across-arc isotopic variations were caused by a two-component mixing between MORB-type wedge mantle and oceanic sediments with different degrees of sediment involvement which depend on the depth of subducting oceanic slab. The abundance ratios among Pb, Sr and Nd in the subducted oceanic sediment were estimated from the mixing relationships in the isotope compositions. The estimated Sr/Pb ratio of subducted sediments does not change during subduction, while the Nd/Sr and Nd/Pb increase towards the back-arc side. These observations suggest that the subduction component was added to the wedge mantle as a fluid through the dehydration of subducted oceanic sediment and the degree of dehydration decreases with increase in the depth of slab, and that the subducting oceanic slab does not melt beneath northeastern Japan.
Three-week-old male rats were given 2.7mEq Li2CO3/kg/day orally for 1 or 3 weeks, and the level of IP3 in the brain was estimated. Although the level of IP3 was not affected by the administration of Li2CO3, IP3 was further fractionated to I-1, 3, 4-P3 and I-1, 4, 5-P3 by HPLC. The relative percentages of I-1, 3, 4-P3 and I-1, 4, 5-P3 were 95.8 and 4.2 in controls and 69.6 and 30.4 in brains of rats treated with lithium. Since I-1, 4, 5-P3 is known to be a messenger inside the cells to regulate cell-to-cell communication compared with I-1, 3, 4-P3, this increase in the relative level of I-1, 4, 5-P3 in the brain might be relevant for the treatment of manic-depressive disorders.
With immunohistochemical staining using polyclonal antibodies against the carboxyl terminus of a dystrophin molecule, the surface membranes of fetal and denervated adult muscle fibers and the neuromuscular junctions in dystrophin deficient mdx mice showed positive immunoreactivity. The behavior of the positively stained protein was similar to that of the acetylcholine receptor. We conclude that this immunoreactive protein, probably a dystrophin-related protein, plays a role in the assembly of junctional proteins.