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The toxicological effects of nanometer titanium dioxide (nano-TiO 2 ) on a unicellular green alga Chlamydomonas reinhardtii were assessed by investigating the changes of the physiology and cyto-ultrastructure of this species under treatment. We found that nano-TiO 2 inhibited photosynthetic efficiency and cell growth, but the content of chlorophyll a content in algae did not change,...
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