Chronic Toxicity Testing Articles & Analysis
38 articles found
Acute and chronic bioassays were carried out with a battery of test organisms. The acute toxicity was assessed using Daphnia magna (crustacea) and Vibrio fischeri (luminescent bacteria). The chronic toxicity was tested with Selenastrum capricornutum (green algae) and Lepidium sativum (a higher ...
For Cu and PCP, the sensitivity of B. calyciflorus compared favourably to chronic toxicity tests with Daphnia magna, while for the other two compounds B. calyciflorus proved to be rather insensitive. Considering the increasing need for relatively short toxicity tests, the two described ...
Based on structure-activity relationship (SAR) analysis of test data on analogous carbon nanotubes and other respirable poorly soluble particulates, EPA identified potential lung effects and skin penetration and toxicity induction from inhalation and dermal exposure to the PMN substance. Further, EPA predicts toxicity to aquatic organisms via ...
Acute tests (96h) were performed with juvenile and adult snails, in both media, to assess lethality, and egg mass chronic tests, with APW medium only, to assess embryo viability and mortality, carried out until reaching 90% hatching success in the control. ...
We investigated the univariate effects of Ca, pH and DOC on chronic (48h) Pb toxicity to the freshwater rotifer Brachionus calyciflorus. ...
While standardized sediment toxicity testing methods have been developed for the amphipod Hyalella azteca, no standardized chronic water‐only toxicity testing methods have been established. Furthermore, optimal feeding and water quality conditions for culturing and toxicity ...
Risk assessment procedures for metals currently lack a framework to incorporate chronic metal mixture toxicity. Here, the toxicity of binary and ternary mixture combinations of Ni, Zn, and Pb was investigated in three large‐scale experiments using the standard chronic (7d) C. dubia reproductive toxicity ...
Chronic toxicity test methods for assessing the toxicity of contaminants to tropical marine organisms are generally lacking. A 96‐h chronic growth rate toxicity test was developed for the larval stage of the tropical dogwhelk, Nassarius dorsatus. ...
Both individual and mixture toxicities of 10 APIs were evaluated using three short‐term chronic toxicity tests using the alga Pseudokirchneriella subcapitata, daphnid Ceriodaphnia dubia, and zebrafish Danio rerio. ...
Laboratory chronic toxicity tests with plankton, benthos, and fish early life stages were conducted with total dissolved solids (TDS) at an ionic composition specific to Snap Lake (NWT, Canada), which receives treated effluent from the Snap Lake Diamond Mine. ...
The acute and chronic toxicity of sulfate (tested as sodium sulfate) were determined in diluted well water (hardness of 100 mg/L and pH 8.2) with a cladoceran (Ceriodaphnia dubia; 2‐ and 7‐d exposures), a midge (Chironomus dilutus; 4‐ and 41‐d exposures), a unionid mussel (pink mucket, Lampsilis abrupta; 4‐ and 28‐d exposures), and a fish ...
In this study, a metadataset of daphnid chronic toxicity tests was compiled to analyze strength and significance of NOEC:EC10 and NOEC:EC20 relationships. ...
Previous studies focusing on the relationship between the size or variation of ACRs to substance classes and QSAR‐models were often based on data for standard test organisms, such as daphnids and fish. For the present study, we performed acute and chronic toxicity tests with the nematode Caenorhabditis elegans for a total of 11 ...
While insects occur in nearly all freshwater ecosystems, few sensitive insect models exist for use in determining the toxicity of contaminants. The objectives of the present study were to adapt previously developed culturing and toxicity testing methods for the mayfly Neocloeon triangulifer (Ephemeroptera: Baetidae), and to further develop a ...
At the same time, and partly in response to legislative drivers, there has been an increase in the use of chronic (long‐term) toxicity tests, and alternative methods for assessing the quality of effluent discharges. ...
There is a shortage of established chronic toxicity test methods for assessing the toxicity of contaminants to tropical marine organisms. We tested the suitability of the tropical microalga Isochrysis galbana for use in routine ecotoxicology and assessed the effects of 72‐h exposures to copper (Cu, a reference ...
Water hardness, chloride and alkalinity were tested as possible toxicity modifying factors for fluoride using acute toxicity tests with Hyalella azteca and Oncorhynchus mykiss. Chloride appeared to be the major toxicity modifying factor for fluoride in these acute toxicity tests. ...
However, the chronic toxicity of AMPA to aquatic animals has not been evaluated before this study. ...
To incorporate metal mixture toxicity effects into risk assessment procedures, more information is needed about combined and interactive effects of metal mixtures during chronic exposure. Here, the authors investigated the toxicity of binary Ni‐Zn mixtures in two independent full‐factorial experiments using standard chronic ...