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DOUBLE PEAKED OUTBURSTS OF THE BLAZAR OJ 287 IN 1994 - 1996
ARIMOTO JUN'ICHI,SADAKANE Kozo,HONDA SATOSHI,TANABE KAZUHITO The Korean Astronomical Society 1996 Journal of The Korean Astronomical Society Vol.29 No.suppl1
VRI bands CCD photometric observations of the BL Lac object OJ 287 have been carried out during the period from October, 1994 to May, 1996. OJ 287 underwent two major outbursts during our observations. The first peak (V14.0 mag.) occurred in the first half of November, 1994 and faded out to 16.5 mag within 150 days. The second peak (14.0 mag.) was observed in late December, 1995. The latter peak continued at nearly the same brightness until May, 1996. Such a long lasting outburst has never been reported for OJ 287. Color indices (V - R and V-I) remained nearly constant during the outbursts.
Kanezaki, Hiroshi,Nishimoto, Sei-Ichi,Tanabe, Kazuhito Korean Society of Photoscience 2014 Rapid communication in photoscience Vol.3 No.4
We characterized the one-electron reduction of oligodeoxynucleotides with a 2-oxopropyl group on a thymine base ($d^{oxo}T$) and applied the reaction to the radiolytic activation of DNAzyme function. We designed a system in which the DNAzyme function of cleaving mRNA was suppressed by introduction of $d^{oxo}T$ into the strand of DNAzyme. Hypoxic X-irradiation led to recovery of the cleavage ability because the 2-oxopropyl group was removed to form unmodified DNAzyme. We characterized the DNAzyme function by monitoring the fluorescence change of fluorophore- and quencher-labeled target strands. We confirmed that the DNAzyme function could be regulated by hypoxic X-irradiation and the reaction of $d^{oxo}T$.