bioassay Articles
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Joint Toxicity of Cadmium and Phenanthrene in the Freshwater Amphipod Hyalella azteca
Abstract The joint toxicity of combined metals and polynuclear aromatic hydrocarbons is poorly understood and may deviate from the summed concentration responses of the individual pollutants. The freshwater amphipod Hyalella az-teca was exposed to sediment-amended Cd and phenanthrene (Phen) individually and in combination using United States Environmental Protection Agency 10-day sediment ...
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Cadmium accumulation and toxicity in the unicellular alga Pseudokirchneriella subcapitata: Influence of metal‐binding exudates and exposure time
Predicting metal availability and toxicity for chronic (several hours or days) metal exposure scenarios, even for unicellular algae, is a major challenge to existing toxicity models. This is because several factors affecting metal uptake/toxicity, such as the release of metalbinding exudates, changes in the kinetics of metal uptake/toxicity over time and algal physiological acclimation to ...
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Effects of climate change on the toxicity of soils polluted by metal mine wastes to Enchytraeus crypticus
The present study aimed to assess the effects of climate change on the toxicity of metal‐polluted soils. Bioassays with Enchytraeus crypticus were performed in soils polluted by mine wastes (mine tailing, forest and watercourse) and under different combinations of temperature (20 and 25 °C) and soil moisture content (50 and 30% of the soil water holding capacity). Survival and reproduction ...
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Identifying the causes of sediment‐associated toxicity in urban waterways in South China: Incorporating bioavailabillity‐based measearuments into whole‐sediment toxicity identification evaluation
Sediments in urban waterways of Guangzhou, China were contaminated by a variety of chemicals and showed prevalent toxicity to benthic organisms. A combination of whole‐sediment toxicity identification evaluation (TIE) procedure and bioavailability‐based extraction approaches were used to identify the causes of sediment toxicity. Four of the six sediment samples collected caused 100% mortality ...
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A robust bioassay to assess the toxicity of metals to the antarctic marine microalga Phaeocystis antarctica
Despite evidence of contamination in Antarctic coastal marine environments, no water‐quality guidelines have been established for the region because of a paucity of biological effects data for local Antarctic species. Currently, there is limited information on the sensitivity of Antarctic microalgae to metal contamination, which is exacerbated by the lack of standard toxicity testing protocols ...
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Toxicity Determination of the Sediments of the River Seine in France by Application of a Battery of Microbiotests
Abstract : This study reports on the potential of the Toxkit microbiotests and the bacterial luminescence test Microtox®, to detect and quantify the toxicity of the sediments of the river Seine and a few tributary rivers in France. The objective of the research was to try to identify a minimum test battery for routine toxicity screening of river sediments. Attempts were also made to correlate ...
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