In order to investigate the endocrine toxicity of B(a)p to marine polychaete P erinereis aibuhitensis, vitellogenin(VTG) cDNA from the P. aibuhitensis was isolated, recombinated and expressed for the first time. The full length P. aibuhitensis vitellogenin gene(PaVTG) was 5 325 bp, and encoded 1 692 amino acids. It contained the vitellogenin_N domain of unknown function(DUF1943), a von Willebrand factor type D domain, as well as a conserved KALGNAG motif. The expression of VTG gene and protein were mainly up-regulated after exposed to B(a)p at transcriptional and translational levels. PaVTG gene expression did not change significantly at day 4. At day 7 PaVTG expression was up-regulated in 0.5 μg/L and 5 μg/L B(a)p group. At day 14 PaVTG was significantly up-regulated in 0.5–10 μg/L B(a)p. The protein expression of PaVTG in 0.5 μg/L and 10 μg/L B(a)p group was up-regulated with time prolonging, but the expression in 5 μg/L and 50 μg/L B(a)p group exhibited first increased and then decreased trend. With the increasing of B(a)p concentration PaVTG mRNA and protein expression both firstly increased then decreased. In contrast to B(a)p exposure, estradiol did not induce PaVTG gene and protein expression, until late times of exposure(14 d). Overall, the results in this study indicate that PaVTG could be used as a potential indicator of the effects environmental estrogenic compounds.
根据海洋监测规范中沉积物中油类的检测方法(GB 17378.5—2007),应用超生萃取滩涂石油污染土壤中的石油烃,研究萃取剂、萃取时间、萃取次数、萃取温度以及液固比的影响。结果表明,超生萃取滩涂石油污染土壤的最佳条件为:萃取剂为二氯甲烷,萃取温度30℃,萃取时间15 min,液固比为6∶1 m L/g,萃取次数为2次。在此条件下,2%,1%,0.5%和0.1%的石油污染滩涂底质的萃取率分别达到90.09%,88.86%,82.65%和85.71%。
