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41.
1991-1992年对重庆市郊若干酸化水体的生物待正与理化参数进行综合研究的结果表明,藻类的种类数、细胞密度、生物量和叶绿素a含量以及浮游动物的种类数等均与呈正相关,但与H+和总Al浓度呈负相关。浮游动物的个体密度在酸化水体中明显下降,但是鱼的捕食作用掩盖了其与上述化学参数之间的相关性。水体中H+和总Al浓度的增加在很大程度上对浮游生物产生了不利影响,水体的透明度、总Al.TP和SO与pH的相关性十分明显,r值分别为-0.6375、-0.6868、0.7561和0.7323。 相似文献
42.
Many observations are reported that organic mercury compounds are involved in increasing intracellular Ca2+ levels. However, the issue of which substances on the cell membrane participate in the Ca2+ uptake that is induced by ethyl mercury is unclear. The findings of this study suggest that the P2X receptor participates in this process. The uptake of Ca2+ by C8-B4 cells was induced in the presence of ethyl mercury. Ca channels in the cell membrane were not affected in this process. In contrast, pretreatment with suramin, an antagonist of the P2X receptor, inhibited the Ca2+ uptake induced by ethyl mercury, and also brilliant blue G, a nonselective antagonist of P2×4, P2×5, and P2×7 receptors. In addition, A438079 and A740003, selective antagonists of P2×7 receptor, reduced Ca2+ uptake, while 5-BDBD, a selective antagonist of P2×4 receptor, did not. Furthermore, the mRNAs of both the P2×4 and P2×7 receptors were expressed in the presence of ethyl mercury, but the P2×5 receptor mRNA was not. These findings suggest that ethyl mercury may induce Ca2+ uptake through the P2×7 receptor of the cell membrane. 相似文献
43.
Kondo Monami Sakamoto Yasuhide Kawabe Yoshishige Nakamura Kengo Watanabe Noriaki Komai Takeshi 《Environmental Modeling and Assessment》2022,27(2):251-273
Environmental Modeling & Assessment - This work developed a model for predicting the volatilization flux from the unsaturated soil contaminated by volatile chemical substances (VCSs) such as... 相似文献