Article
Marine & Freshwater Biology
Ferry Saputra, Michael Edbert Suryanto, Gilbert Audira, Cao Thang Luong, Chih-Hsin Hung, Marri Jmelou Roldan, Ross D. Vasquez, Chung-Der Hsiao
Summary: This study presents a simple and automatic method to analyze the cardiac performance of Daphnia using DeepLabCut software. The use of macro scripts in data summarization and comparison with manual methods further enhances the efficiency of analysis. The study also demonstrates the potential cardiotoxic effects of imidacloprid and pendimethalin on D. magna, highlighting the importance of this method for fast and accurate cardiotoxicity measurements.
AQUATIC TOXICOLOGY
(2023)
Article
Environmental Sciences
Qingzhu Jia, Junli Wang, Fangyou Yan, Qiang Wang
Summary: A quantitative structure-toxicity relationship (QSTR) model based on norm descriptors was established in this study to predict the toxicity of pesticides to Daphnia magna. The model showed good predictability, stability, and reliability, indicating that norm descriptors might be universally applicable in describing the relationship between the toxicity and structures of pesticide compounds.
Article
Engineering, Environmental
Aaron Boyd, Ivy Luu, Devang Mehta, Sunil P. Myers, Connor B. Stewart, Karthik R. Shivakumar, Katherine N. Snihur, Daniel S. Alessi, Maria Camila Rodriguez Gallo, Heather Veilleux, Marin E. Wiltse, Thomas Borch, R. Glen Uhrig, Tamzin A. Blewett
Summary: Hydraulic fracturing uses water and proppants to extract oil and gas, but the resulting wastewater, called flowback and produced water (FPW), contains toxic compounds. Previous research has shown the toxicity of FPW to Daphnia magna (D. magna). This study found that D. magna was unable to recover from a 48-hour exposure to FPW, and the toxicity persisted for at least 19 days post-exposure. The study highlights the importance of considering long-term effects of FPW remediation in spill scenarios.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Beatriz Salesa, Javier Torres-Gavila, Encarnacion Sancho, Maria Dolores Ferrando
Summary: In this study, the ecotoxicological effects of Pyriproxifen, an insecticide, on the crustacean Daphnia magna were evaluated. Acute toxicity tests, feeding behavior tests, and chronic toxicity tests were conducted on the parental daphnid generation (F0). The results showed that exposure to Pyriproxifen led to a decrease in reproductive parameters and population growth rate in the F0 generation, while the survival rate remained unaffected. Offspring from the F0 generation also exhibited abnormalities in morphology and a decrease in reproductive parameters. Additionally, the appearance of males among the F0 offspring was observed.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Siliang Yuan, Chengqian Liang, Wen Li, Robert J. Letcher, Chunsheng Liu
Summary: The study aimed to develop a method using D. magna swimming behavior for toxicity assessment of environmental chemicals. It found that the 48-well plate was the most suitable chamber for behavioral monitoring, and identified D. magna's sensitivity to methylmercury-chloride. The results confirmed the reliability and practicability of the monitoring method.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Marine & Freshwater Biology
Eunjin Byeon, Min-Sub Kim, Duck-Hyun Kim, Yoseop Lee, Haksoo Jeong, Jin-Sol Lee, Sung-Ah Hong, Jun Chul Park, Hye-Min Kang, Alaa El-Din H. Sayed, Yasuhiko Kato, Sangsu Bae, Hajime Watanabe, Young Hwan Lee, Jae-Seong Lee
Summary: In this study, the genome of the water flea Daphnia magna NIES strain was assembled using Oxford nanopore sequencing tool, and gene targeting was successfully demonstrated using CRISPR/Cas9 technology with the glutathione S-transferase omega 2 (GST-O2) gene as an example. Mutant lines were efficiently created and compared to wild type for their response to arsenic exposure. This research contributes to the future construction of deletion mutants in D. magna for further study of gene functions related to pollutant resistance.
AQUATIC TOXICOLOGY
(2022)
Article
Environmental Sciences
Peng Wang, Qin-Qin Li, Jin Hui, Qian-Qian Xiang, Hui Yan, Li-Qiang Chen
Summary: The study showed that exposure to MPs-20 and MPs-30 resulted in significant accumulation of microplastics in the gut of D. magna, decreased survival and heart rate. Metabolomics analysis revealed that both MPs-20 and MPs-30 induced significant changes in numerous metabolites in D. magna.
Article
Environmental Sciences
Simona Mondellini, Matthias Schott, Martin G. J. Loder, Seema Agarwal, Andreas Greiner, Christian Laforsch
Summary: This study found that exposure to water soluble synthetic polymers can cause life history changes and altered levels of reactive oxygen species in the freshwater key species D. magna, although acute mortality was not observed. These sublethal effects may result in cascading effects that can impact the entire food web.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Cristian Gomez-Canela, Ferran Esquius, Carlos Barata
Summary: The role of serotonin in the phototactic and locomotor behavior of Daphnia magna was examined through genetic and pharmacological approaches. The study found that animals lacking serotonin exhibited increased negative phototaxis and locomotor activity, as well as reduced responses to fish kairomones. Exogenous serotonin restored the phototactic and locomotor behavior of individuals lacking serotonin, but had no effect on the response to fish kairomones. Surprisingly, fluoxetine altered locomotor activity and phototactic behavior in serotonin-deficient individuals, and also increased acethylcholine and GABA concentrations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Sabrine Afsa, Madalena Vieira, Ana Filipa Nogueira, Hedi Ben Mansour, Bruno Nunes
Summary: Hospital wastewater (HWW) poses a potential threat to freshwater crustaceans, with findings suggesting that HWW can disrupt the antioxidant defense system and key pathways in Daphnia magna larvae at certain concentrations, without causing oxidative damage.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Chahrazad Belaid, Ibtissem Sbartai
Summary: Thiram is able to induce oxidative damage in the aquatic organism Daphnia magna, depleting antioxidants, increasing lipid peroxidation, and leading to oxidative stress and ultimately death. The study highlights the importance of assessing the effects of Thiram on non-vertebrate organisms.
Article
Microbiology
Kathrine Obrestad, Sigurd Einum, Olav Vadstein
Summary: Stochastic processes impact gut bacterial composition, which alters the reproductive rate of Daphnia magna.
FEMS MICROBIOLOGY ECOLOGY
(2022)
Article
Environmental Sciences
Zihang Wang, Yixiang Wang, Shanshan Qin, Zhou Yang, Yunfei Sun
Summary: Polystyrene microplastics are found widely in freshwater ecosystems and have significant impacts on freshwater organisms. Stable interspecific relationships play a crucial role in maintaining the health of aquatic ecosystems. This study investigated the effects of polystyrene microplastics on the predator-induced defenses of Daphnia magna, a zooplankton, exposed to predation risks from Rhodeus ocellatus, a zooplanktivorous fish. Results showed that polystyrene microplastics weakened the predator-induced defenses of D. magna, including morphology, reproduction, and behavior.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Vanessa Wirzberger, Michelle Klein, Marion Woermann, Holger Lutze, Bernd Sures, Torsten C. Schmidt
Summary: Micropollutants in wastewater treatment plants may form transformation products (TP) through ozonation, which can have ecotoxicological concerns. This study investigated the acute toxicity of parent substances and TPs on Daphnia magna, showing that complex water matrices can influence the toxicity of TPs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Katerina Savva, Marinella Farre, Carlos Barata
Summary: This study investigates the toxicity of microplastics (MPLs) from two widely used bioplastics, polylactic acid (PLA) and polyhydroxybutyrate (PHB), on the aquatic species Daphnia magna. The results show that bioplastic microplastics are more toxic than plastic additives alone and more toxic than fossil plastics.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Daniel Escalera-Lopez, Zhiheng Lou, Neil V. Rees
ADVANCED ENERGY MATERIALS
(2019)
Article
Engineering, Multidisciplinary
Adamu Musa Mohammed, Mustafa Iqbal, Neil Rees, Alessio Alexiadis
APPLIED MATHEMATICAL MODELLING
(2019)
Article
Chemistry, Analytical
Azrul Azhar, Tshiamo Manyepedza, Abiola Oladeji, Ruba Hendi, Neil Rees
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2020)
Article
Energy & Fuels
Mehmet Fatih Kaya, Nesrin Demir, Neil Rees, Ahmad El-Kharouf
Article
Chemistry, Analytical
Laura K. Allerston, David Hodgson, Christopher Gibbs, Dan J. L. Brett, Neil V. Rees
Article
Green & Sustainable Science & Technology
Daniel Escalera-Lopez, Kim D. Jensen, Neil Rees, Maria Escudero-Escribano
Summary: The study proposed a method of decorating IrOx thin films with amorphous tungsten sulphide to enhance OER stability in acidic conditions. The research showed that this decoration method could improve specific activity metrics for OER and minimize roughening of the Ir surface.
ADVANCED SUSTAINABLE SYSTEMS
(2021)
Article
Chemistry, Physical
Mehmet Fatih Kaya, Nesrin Demir, Neil V. Rees, Ahmad El-Kharouf
Summary: The production of green hydrogen using proton exchange membrane water electrolysis technology is efficient but expensive. By modifying the electrocatalyst for oxygen evolution reactions to improve bubble separation, the performance of the catalyst is enhanced.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Abiola V. M. Oladej, James Courtney, Neil V. Rees
Summary: This study demonstrates the possibility of depositing metals onto low-metal content particles using impact electrochemistry. Copper deposition on fly-ash cenospheres as well as silver and gold nanoparticles was achieved through electrochemical impacts. The correlation between impact signals and deposition potentials was confirmed. The electrochemical activity of cenospheres was shown to facilitate copper deposition, which was confirmed through SEM/EDX and ICP-MS analysis.
ELECTROCHIMICA ACTA
(2022)
Article
Nanoscience & Nanotechnology
Ravi K. Biroju, Patrick Harrison, Wolfgang Theis, Neil Rees, Rahul Sharma, Tharangattu N. Narayanan, Myung Gwan Hahm
Summary: This study synthesized hybrid materials composed of platinum nanoclusters and tungsten disulfide 2D atomic layers, revealing the interaction between nanoclusters and the 2D material using high-resolution scanning transmission electron microscopy and micro-Raman spectroscopy. The findings provide a new route for the controlled incorporation of size-selected nanoclusters on the 2D tungsten disulfide basal plane, offering potential applications in catalysis and energy harvesting devices.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Tshiamo Manyepedza, James M. Courtney, Abigail Snowden, Christopher R. Jones, Neil V. Rees
Summary: In this study, nano-particulate MoS2 was explored as a hydrogen evolution reaction (HER) catalyst. The onset potential at pH 2 was found to be -0.10 V (vs RHE), which was confirmed to be due to HER. XPS and XRD analysis were used to categorize the materials and confirm their chemical composition and crystal structure. The early onset of HER was postulated to be due to the presence of nanoplatelets.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Abiola V. Oladeji, James M. Courtney, Marcos Fernandez-Villamarin, Neil V. Rees
Summary: This study demonstrates the generation of carbon-supported palladium catalysts from waste solutions using nanoimpact technique, and shows their catalytic properties in synthesis and electrocatalysis. Direct evidence of palladium modification was obtained through various characterization methods.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Molly E. Keal, James M. Courtney, Neil V. Rees
Summary: The field of impact electrochemistry has recently been applied to the recovery of commercially important metals, where electrochemical processes occur at nanoparticles during collisions with a substrate electrode. In this study, the reduction and oxidation of solution Mn(II) were observed on carbon black particles during nanoimpacts, with the onset potentials of the reduction and oxidation processes in good agreement with solution voltammetry. The formation of Mn(0) and MnO2 was confirmed through SEM/EDX analysis and XPS analysis.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Klaudia Englert, Ruba Hendi, Peter H. Robbs, Neil Rees, Alex P. G. Robinson, James H. R. Tucker
NANOSCALE ADVANCES
(2020)
Article
Energy & Fuels
Alan J. Stephen, Neil Rees, Iryna Mikheenko, Lynne E. Macaskie
FRONTIERS IN ENERGY RESEARCH
(2019)
Article
Chemistry, Multidisciplinary
James S. Walker, Neil V. Rees, Paula M. Mendes
JOURNAL OF EXPERIMENTAL NANOSCIENCE
(2018)
