【摘 要】
:
To investigate the effects of polycyclic aromatic hydrocarbons (PAHs) and metals on the population reproduction, antioxidative defense system and cell ultrastru
【机 构】
:
River and Coastal Environment Research Center
【基金项目】
:
国家重点基础研究发展计划(973计划)
论文部分内容阅读
To investigate the effects of polycyclic aromatic hydrocarbons (PAHs) and metals on the population reproduction, antioxidative defense system and cell ultrastructure of the marine diatom, fluoranthene and Cu2+ were selected to test their toxicity to Phaeodactylum tricorntum, in the laboratory. The results indicated that both fluoranthene and Cu2+ inhibited population reproduction of P. tricorntum.When the algal cells were exposed to fluoranthene or Cu2+ for 72 h, ultrastructure damage in the cells was observed under a Transmission Electron Microscope (TEM). The chloroplast was a sensitive organelle and the membrane system was very sensitive to the toxicity of fluoranthene or Cu2+. The normal metabolic process might be affected due to cell ultrastructural impairment. However, it needed further investigation to discern whether the ultrastructural damage was responsible for the inhibition of population reproduction.Malondialdehyde (MDA) content indicating oxidative stress was a sensitive index to both fluoranthene and Cu2+ toxicity. Superoxide dismutase (SOD) activity was also a sensitive index to Cu2+ and could be considered as a reference factor in a Cu2+ pollution event, but not in a fluoranthene pollution event.
其他文献
During the last ice age,CO2 concentration (CO2 ) was 180-200 μmol/mol compared with the modern value of 380 μmol/mol,and global temperatures were ~8 ·°C cooler.Relatively little is known about the res
Primary and secondary benzylic alcohols were oxidized to the corresponding carbonyl compounds in good to high yields by environmentally friendly and green oxida
Organic micropollutants, with high toxicity and environmental concern, are present in the landfill leachate at much lower levels than total organic constituents
Our understanding of the effects of elevated atmospheric CO2, singly and In combination with other environmental changes,on plant-soil interactions is incomplet
Biosorption can be an effective process for the removal of heavy metals from aqueous solutions. The adsorption of Cu(Ⅱ) from aqueous solution on the extracellu
Increased water clarity associated with zebra mussel (Dreissena polymorpha) populations may favor benthic algal primary production in freshwater systems previou
Plants grown under elevated atmospheric [CO2] typically have decreased tissue concentrations of N compared with plants grown under current ambient [CO2]. The ph
Methamidophos (Met) is a broad spectrum organophosphorus insecticide and acaricide. Even a trace of its residue is harmful to humans and many animals. In this s
Reclamation of clean water from filter backwash water was studied through pilot-scale experiments. The pilot plant consisted of clarification, sand-filtration,
Toxicity identification evaluation (TIE) can be used to determine the specific toxicant(s) in industrial effluents. In the current study,the authors have attemp