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We examined the effects of tributyltin (TBT) on aerobic and anaerobic energy metabolism of pen shell (Atrina pectinata japonica). We exposed pen shells to TBT at nominal concentrations of 0 (control) and 1.0microg/l for 72h under aerobic condition. At the end of the exposure, half of the pen shells in each treatment were wrapped in plastic wrap to simulate exposure to hypoxia and held at 25 degrees C for another 12h. The concentrations of the products of energy metabolism, namely lactate, pyruvate, fumarate and succinate, in adductor muscle were measured. The exposure to TBT under aerobic condition significantly elevated lactate, pyruvate and fumarate concentrations (p<0.001). After subsequent exposure to anaerobic condition, the mean concentration of succinate in the TBT treatment group was 64% of that in the control group, but there were no significant differences. Our results suggest that the energy metabolism of pen shell is disrupted by exposure to TBT. 相似文献
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Shibata Hideaki Galloway James N. Leach Allison M. Cattaneo Lia R. Cattell Noll Laura Erisman Jan Willem Gu Baojing Liang Xia Hayashi Kentaro Ma Lin Dalgaard Tommy Graversgaard Morten Chen Deli Nansai Keisuke Shindo Junko Matsubae Kazuyo Oita Azusa Su Ming-Chien Mishima Shin-Ichiro Bleeker Albert 《Ambio》2017,46(2):129-142
Ambio - Nitrogen (N) management presents a sustainability dilemma: N is strongly linked to energy and food production, but excess reactive N causes environmental pollution. The N footprint is an... 相似文献
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Kei Nakagawa Shin-Ichiro Wada Kazuro Momii Ronny Berndtsson 《Environmental Modeling and Assessment》2008,13(1):121-134
A compact model for evaluation of acid flushing of heavy-metal-contaminated soil in a small-scale on-site treatment plant
is proposed. The model assumes that the soil was re-packed in a container after excavation resulting in a soil structure with
heterogeneous and random physical and chemical properties. To evaluate the effects of heterogeneity on the efficiency of contaminant
removal by acid flushing, a numerical analysis of lead transport in the heterogeneous soil medium was performed. The model
examines cation exchange and surface complexation reactions involving three cations (Ca, Pb, and H) and one anion (Cl) in
both dissolved and exchangeable forms, two Pb surface complexes (SOPbCl and SOPbOH), and one Cl surface complex (SOH2Cl). The transport of these species during flushing with acid in a synthetically generated two-dimensional heterogeneous soil
was simulated in the model. Results indicated that the flushing fluid preferentially followed pathways with large permeability.
The heterogeneous cation exchange capacity (CEC) distribution and surface complexation sites had a significant effect on the
transport of dissolved species. Because the CEC was set to a relatively low value, Pb was adsorbed mainly as surface complexes
(SOPbCl and SOPbOH). Simulation results suggest that blocks of low hydraulic conductivity located in the upper part of the
model domain greatly impede solute transport. Ponding conditions did not significantly affect the efficiency of decontamination.
The model and its results are useful in the design of small-scale treatment plants for acid flushing. 相似文献
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