Article
Environmental Sciences
Kristin A. Connors, Jessica L. Brill, Teresa Norberg-King, Mace G. Barron, Greg Carr, Scott E. Belanger
Summary: The study found no significant differences in acute or chronic sensitivity between D. magna and C. dubia in standard toxicity tests. The variability in acute D. magna and C. dubia regressions was similar to that in D. magna and D. pulex regressions. Slope and y-intercept values were also comparable.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2022)
Article
Environmental Sciences
Paige M. Krupa, Guilherme R. Lotufo, Erik J. Mylroie, Lauren K. May, Kurt A. Gust, Ashley N. Kimble, Michael G. Jung, Jonna A. Boyda, Natalia Garcia-Reyero, David W. Moore
Summary: Perfluorooctane sulfonic acid (PFOS) is a widespread and persistent contaminant in aquatic ecosystems. This study conducted chronic PFOS toxicity tests on four freshwater organisms, and found that the sensitivity to PFOS varied among different species. The midge was the most sensitive, followed by the zebrafish, while the water flea and amphipod showed higher tolerance to PFOS.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Environmental Sciences
Jaqueline P. Souza, Adrislaine S. Mansano, Francine P. Venturini, Valeria S. Marangoni, Paula M. P. Lins, Barbara P. C. Silva, Barbara Dressler, Valtencir Zucolotto
Summary: This study evaluated the toxic effects of gold nanorods (AuNRs) on aquatic organisms, finding decreases in neonate production and filtration rate in cladocerans after exposure. The toxic mechanism in cladocerans was attributed to increased reactive oxygen species (ROS) generation. Enzymatic biomarkers in fish showed recovery after exposure to AuNRs, indicating the impacts of this novel nanomaterial on aquatic biota.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Mark Ballentine, Alan Kennedy, Nicolas Melby, Anthony Bednar, Robert Moser, Lee C. Moores, Erik M. Alberts, Charles H. Laber, Rebecca A. Crouch
Summary: The accessibility and popularity of additive manufacturing (AM) has increased over the past decade, but research on environmental hazard assessment and safety data sheets for 3D printer feedstocks has not kept pace with technology development. Vat photopolymerization may pose unique risks due to mishandling of uncured monomers/oligomer feedstocks and the increasing residential use driven by its decreasing cost. This study explored the acute and chronic toxicity of six uncured resins to Ceriodaphnia dubia, revealing their potential risks and the need for better information dissemination to residential users regarding toxicity and proper handling and waste management procedures for uncured resins.
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2023)
Article
Environmental Sciences
Simon Pouil, Louise M. Stevenson, Leroy Gonez-Rodriguez, Teresa J. Mathews
Summary: This study assessed the chronic toxicity of an innovative Hg water treatment system using SnCl2 followed by air stripping on the freshwater cladoceran Ceriodaphnia dubia. The results showed that SnCl2 treatment effectively removed Hg from the water, without adverse effects on the growth and reproduction of C. dubia.
Article
Environmental Sciences
Christopher A. Mebane, Christopher D. Ivey, Ning Wang, Jeffery A. Steevens, Danielle Cleveland, Michael C. Elias, James R. Justice, Kathryn Gallagher, Robert N. Brent
Summary: The study found that there is a higher risk of delayed mortality for cladocerans and rainbow trout exposed to zinc at different concentrations in the short term. Small invertebrates are more sensitive to zinc than larger fish.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2021)
Article
Engineering, Environmental
L. C. Almeida, A. C. Mattos, C. P. G. Dinamarco, N. G. Figueiredo, D. M. Bila
Summary: Antiviral drugs, including acyclovir, efavirenz, lamivudine, and zidovudine, have been found to have chronic toxic effects on Ceriodaphnia dubia and Raphidocelis subcapitata. Efavirenz showed the highest toxicity levels, posing a significant ecological risk to these organisms. Monitoring of water sources should take into consideration the environmental risk posed by antivirals.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Ecology
Mohd Kotaiba Abugazleh, Hashim M. Ali, Jae A. Chester, Ahed M. Al-Fa'ouri, Jennifer L. Bouldin
Summary: Metal oxides, such as titanium dioxide and iron (III) oxide, are effective in reducing the chronic toxicity of hydroquinone and catechol in water treatment. Among them, iron (III) oxide shows better potential in reducing the toxic effects of these pollutants compared to titanium dioxide.
Article
Environmental Sciences
John D. Stark, Mu Qiao, John E. Banks
Summary: This study determined the toxicity of the insecticide chlorantraniliprole and its formulated product Altacor(R) on Cladoceran Ceriodaphnia dubia. The results showed that both compounds had equal toxicities on C. dubia, contrary to previous studies. Therefore, assuming the toxicity of formulated and unformulated products is ill advised.
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2022)
Article
Biodiversity Conservation
Jacob M. Hutton, Steven J. Price, Stephen C. Richter, Christopher D. Barton
Summary: Changes in land use, such as mountaintop removal mining with valley fills, often lead to headwater streams with elevated specific conductivity (SC), which affects stream salamanders. Increased SC indirectly impacts stream salamander populations by altering the composition of their diet, reducing food availability and ultimately leading to reduced population occupancy and abundance.
GLOBAL ECOLOGY AND CONSERVATION
(2021)
Article
Marine & Freshwater Biology
Claire Duchet, Chelsea J. Mitchell, Jenifer K. McIntyre, John D. Stark
Summary: Neonicotinoid insecticides, widely used in agriculture and pest control, have significant impacts on aquatic organisms. This study investigated the toxicological effects of a mixture of imidacloprid, clothianidin, and thiamethoxam on two species of water fleas. The results demonstrate that traditional toxicological approaches may underestimate the negative impacts of pesticide mixtures on the environment.
AQUATIC TOXICOLOGY
(2023)
Article
Toxicology
Akira Okamoto, Shigeki Masunaga, Norihisa Tatarazako
Summary: The chronic toxicity of 50 metals on water flea,Ceriodaphnia dubia, was investigated, revealing a wide range of IC20 values for different metals and unknown data for some. The study showed that the IC50 values of different metals were not significantly correlated with factors such as electronegativity and atomic weight.
JOURNAL OF APPLIED TOXICOLOGY
(2021)
Article
Environmental Sciences
John M. Besser, Chris D. Ivey, Jeffery A. Steevens, Danielle Cleveland, David Soucek, Amy Dickinson, Eric J. Van Genderen, Adam C. Ryan, Chris E. Schlekat, Emily Garman, Ellie Middleton, Robert Santore
Summary: The study investigated biotic ligand model (BLM) predictions of nickel and zinc toxicity in natural waters from Illinois and Minnesota, USA. It was found that pH, hardness, and dissolved organic carbon had significant impacts on the toxicity of these metals, with zinc showing greater variation in toxicity across different test waters. Recalibrating the nickel BLM to be more responsive to pH changes was crucial for improving toxicity predictions.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Gianluca Selvestrel, Giovanna J. Lavado, Alla P. Toropova, Andrey A. Toropov, Domenico Gadaleta, Marco Marzo, Diego Baderna, Emilio Benfenati
Summary: The risk characterization of chemicals depends on the determination of repeated-dose toxicity (RDT), which involves the identification of the no-observed-adverse-effect level (NOAEL) and the lowest-observed-adverse-effect level (LOAEL). In vivo tests for RDT are time-consuming and expensive, making in silico models an attractive and challenging alternative. This study developed and validated eight in silico models for predicting NOAEL and LOAEL, focusing on systemic and organ-specific toxicity.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Medicine, General & Internal
Yun-Chen Chang, Ta-Jen Lee, Chi-Che Huang, Po-Hung Chang, Yi-Wei Chen, Chia-Hsiang Fu
Summary: This study aimed to investigate the role of serum Af-sIgG levels in patients with primary chronic rhinosinusitis (CRS). The results showed that the T2 CRS group had significantly higher serum Af-sIgG levels compared to the non-T2 CRS group. Serum Af-sIgG level was found to be an independent factor for early disease recurrence within one year in primary CRS patients. The optimal cutoff value of serum Af-sIgG level to predict postoperative recurrence was 27.1 mg/L.
INTERNATIONAL JOURNAL OF MEDICAL SCIENCES
(2023)