Ecological risk assessment of petroleum hydrocarbons on aquatic organisms based on multisource data.

From the perspective of ecological risk, this study uses a multisource data method to search for global data, uses the acute and chronic ratio method to process the data, uses the species-sensitive distribution method to evaluate the ecological risk that petroleum hydrocarbons pose to aquatic organisms, and evaluates the ecological risk of the water environment in five Chinese water bodies. The results are as follows. First, in an aquatic ecosystem, the toxicological effects of petroleum hydrocarbons were found to be more obvious on consumers, and the sensitivity of fish was found to be higher than that of crustaceans. Second, the acutely lethal effects of petroleum hydrocarbons, fluorene, and benzo [a] pyrene on aquatic ecosystems were fitted by using the documentary method of multisource data collection and a Log-logistic curve. Third, in the case study evaluation of five Chinese water bodies, the ecological risks of polycyclic aromatic hydrocarbons were ranked (from low to high) as fluorene < benzo [a] pyrene. The ecological risk values of benzo [a] pyrene were all greater than 1. These risks should not be underestimated, and prevention and control work should be performed.

[Antitumor effect of phlomio1 in vivo and in vitro].

To study the antitumor effect of phlomiol extracted from Phlomis younghusbandii in vivo and in vitro. The inhibitory effect of phlomiol on two kinds of human tumor cells proliferation was assayed by MTT method. Transplant tumor models of S180 and H22 were used. After transplantation, different doses of phlomiol were given to the mice for 14 days. The inhibitory rates were calculated. MTT method was used to assess the proliferation of T spleen lymphocyte cells and the activity of NK cells in tumor-bearing mice with S180. Phlomiol (50-100 mg x L(-1)) inhibited the proliferation of three kinds of tumor cells in vitro, antitumor effect of phlomiol was in a dose-dependent manner (r = 0.989, P < 0.05). The inhibitory rates of phlomiol (2.5, 5, 10 mg x kg(-1)) were 28.5%-65.0% and 35.0%-74.5% in tumor-bearing mice with S180 and H22 respectively, It could stimulate the spleen T-cells in tumor-bearing mice with S180 and increase the activity of the NK cells. Phlomiol could inhibit the proliferation of three kinds of tumor cells in vitro, present antitumor effect on the tumor-bearing mice, and improve the immunological function.