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To understand the biokinetics and potential risks of p,p'-dichlorodiphenyltrichloroethane (DDT) and its metabolites, p,p'-dichlorodiphenyldichloroethylene (DDE) and p,p'-dichlorodiphenyldichloroethane (DDD), in fish, we exposed the black sea breams (Acanthopagrus schlegeli) to aqueous and dietary DDTs and then evaluated the bioaccumulation, distribution,(More)
Daphnia magna were fed phosphorus-sufficient (+P) and P-deficient (2P) green algae Chlamydomonas reinhardtii (carbon : phosphorus ratio of C : P 5 90 and 930 in molar, respectively) for 5 d to produce different body C : P ratios. The dietary absorption as well as the elimination of body C and P were then quantified under contrasting dietary qualities (+P(More)
We demonstrate that a two-photon excitation fluorescence lifetime imaging technology can rapidly and noninvasively assess the cadmium (Cd)-induced toxic effects in a marine diatom Thalassiosira weissflogii. The chlorophyll, an intrinsic fluorophore, was used as a contrast agent for imaging of cellular structures and for assessment of cell toxicity. The(More)
Tibetan Plateau is located at a mountain region isolated from direct anthropogenic sources. Mercury concentrations and stable isotopes of carbon, nitrogen, and mercury were analyzed in sediment and biota for Nam Co and Yamdrok Lake. Biotic mercury concentrations and high food web magnification factors suggested that Tibetan Plateau is no longer a pristine(More)
Iron (Fe) is an essential trace element for marine fish. However, our knowledge of Fe requirements at different development stages of marine fish is still limited. Here, we reported the efficient Fe absorption strategies adopted by larval fish under different dietary Fe supplementary levels (i.e., 0-640 mg/kg). Biokinetically, the larval fish controlled(More)
We examined the Zn uptake in marine diatoms and its transfer to marine copepods under different nutrient-replete and-deplete conditions. Zn uptake, quantified by measurements of both total cellular and intracellular Zn accumulation in two coastal diatoms (Thalassiosira pseudonana and Thalassiosira weissflogii), was greatly dependent on the ambient nitrogen(More)
The strategies used by a coastal diatom, Thalassiosira pseudonana, for potentially different iron (Fe) requirements under different temperatures and irradiances were examined on the basis of three parameters: Fe uptake rate, cell-specific growth rate, and Fe efflux rate constant. These three variables determined the cellular Fe concentration, and they were(More)
The ability to eliminate (efflux) metals is a physiological trait that acts as a major driver of bioaccumulation differences among species. This species-specific trait plays a large role in determining the metal loads that species will need to detoxify to persist in chronically contaminated environments and, therefore, contributes significantly to(More)
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