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Articles by T Mukai
Total Records ( 3 ) for T Mukai
  S Yoshimura , M Koga , K Toyoda , T Mukai , B. H Hyun , M Naganuma , K Nagatsuka and K. Minematsu

SUMMARY: The frontal bone window (FBW) is a promising approach in evaluating the anterior cerebral artery. The goal of the present study was to determine the rates of detection of the basal cerebral arteries by using the FBW alone and a combination of the FBW with the temporal bone window (TBW) in 163 patients. The combined application improved detection rates of A1 (58.6% versus 46.0%, P = .001) and A2 (43.6% versus 6.7%, P < .001) compared with the TBW alone.

  M Hirose , T Mukai , D Hwang and K. Iida

Hirose, M., Mukai, T., Hwang, D., and Iida, K. 2009. The acoustic characteristics of three jellyfish species: Nemopilema nomurai, Cyanea nozakii, and Aurelia aurita. – ICES Journal of Marine Science, 66: 1233–1237.

Reports about jellyfish damaging nets and reducing fish catches are increasing, and data on the abundance and distribution of various jellyfish species are needed to forecast where and when their blooms will happen. Acoustic techniques can be used to obtain this information if the acoustic characteristics of the targets are known. This is a study of acoustic scattering from three jellyfish species: Nemopilema nomurai (order Rhizostomeae), Cyanea nozakii (Semaeostomeae), and Aurelia aurita (Semaeostomeae). Target strength (TS) at 38, 120, and 200 kHz, specific density, and sound speed were measured with live specimens. Specific densities were measured using the displacement–volume–weight and the dual-density methods. The sound speeds were estimated using the time-of-flight method. The reduced TS (RTS), i.e. the TS normalized by bell area, was smaller for N. nomurai (bell diameter range 19–38 cm) than for C. nozakii (bell diameter range 30–40 cm), and the differences in RTS between the species were 17.8, 12.6, and 5.8 dB at 38, 120, and 200 kHz, respectively. The respective sound-speed contrast h and density contrast g were 1.0008 ± 0.009 (mean ± s.d.) and 1.004 ± 0.015 for N. nomurai; 1.038 and 1.073 for one C. nozakii; and 1.0001 ± 0.025 and 0.989 ± 0.019 for A. aurita.

  K Joh , H Yatsuki , K Higashimoto , T Mukai and H. Soejima

The Commd1 gene is imprinted in the adult mouse brain and is predominantly expressed from the maternal allele. A paternally expressing imprinted gene, U2af1-rs1, resides in the first intron of Commd1 in an antisense orientation. We found that RNA polymerase II phosphorylated at serine 2 of the carboxyl-terminal domain repeats, a marker of transcription elongation, is enriched on the paternal allele than on the maternal allele in the Commd1 promoter. The Commd1 promoter harbours no allelic differences in DNA methylation and histone modifications. These results strongly suggested that imprinting of Commd1 is generated by interference with paternal Commd1 transcription by the oppositely directed U2af1-rs1 transcription.

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