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When SAD concentration 8f 1 0-3 mol / L was used the transcription activity of rRNA genes was completely suppresed and SCE frequency was increased to as 4.8 times high as normal, leading to that the birth percentage dropped to 4% from 100% .
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当SAD浓度增至10-3mol/L时,此时rRNA基因转录活性完全被抑制,而且SCE频率增加为正常值的4.;8倍,幼鼠出生率从正常值100%25降为4%25。
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