震中区电磁辐射异常的观测

用余震的活动性测定预报参数——在靠近震中区进行测量的可能性很小.震中区有何特点,越靠近震中区的这种效应越强的假设是否合理?直接靠近震中区进行测量是极少的.这些想法是1984年4月20日加兹利地震后余震活动期间在震源进行试验的基础.对电磁辐射异常的观测是在200—1000赫;3—9千赫和80.5千赫((?)f=100赫)3个频段上进行的.高频信号包络线的记录接到КГП—4多频道自动记录仪上,走纸速度为每小时60毫米,每72秒钟在每一通道上取样一次.1984年9月16日～10月18日观测地震活动时发现,余震活动性与前几个月相比呈衰减趋势;但有感地震在几天之内仍不少于1次.在弱震群中1984年9月27日当地时间     

cDNA cloning of an aryl hydrocarbon receptor from Baikal seals (Phoca sibirica)

Species differences in sensitivity to related planar halogenated aromatic hydrocarbons (PHAH) add significant uncertainty in assessing the ecological risk to aquatic mammals. To investigate mechanisms of PHAH sensitivity in aquatic mammals, we cloned and sequenced the cDNA of Baikal seal aryl hydrocarbon receptor (AHR), an intracellular protein that initiates PHAH-mediated effects. The Baikal seal AHR cDNA has an open reading frame of 843 amino acid residues with a predicted molecular mass of 94.6 kDa. Comparison of AHR amino acid sequences indicated a high degree of sequence conservation (98%) between Baikal and harbor seals. The high conservation of AHRs between Baikal and harbor seals indicates that these seals express AHR proteins closely related structurally. In our previous report (Kim & Hahn, 2002), the dioxin-binding affinity of the harbor seal AHR was at least as high as that of the AHR from a dioxin-sensitive strain of mice, suggesting that this seal species may be sensitive to PHAH effects. This implies that Baikal seal may also be sensitive to dioxin effects.