scholarly journals Toxicity Assessment of Titanium (IV) Oxide Nanoparticles Using <i>Daphnia magna</i> (Water Flea)

2011 ◽  
Vol 26 ◽  
pp. e2011002 ◽  
Author(s):  
Seung Hyuck Bang ◽  
Thai-Hoang Le ◽  
Sung Kyu Lee ◽  
Pil Kim ◽  
Jong Soo Kim ◽  
...  
Keyword(s):  
Daphnia Magna ◽  
Toxicity Assessment ◽  
Oxide Nanoparticles ◽  
Water Flea

Acute and chronic toxicity of metal oxide nanoparticles in chemical mechanical planarization slurries with Daphnia magna

2018 ◽  
Vol 5 (7) ◽  
pp. 1670-1684 ◽  
Author(s):  
Sarah Karimi ◽  
Meiline Troeung ◽  
Ruhung Wang ◽  
Rockford Draper ◽  
Paul Pantano
Keyword(s):  
Metal Oxide ◽  
Daphnia Magna ◽  
Chronic Toxicity ◽  
Chemical Mechanical Planarization ◽  
Metal Oxide Nanoparticles ◽  
Toxicity Assessment ◽  
Oxide Nanoparticles ◽  
Acute And Chronic Toxicity

This work reports the first toxicity assessment with Daphnia magna of model chemical mechanical planarization (CMP) slurries containing specialized nanoparticles used in CMP slurry formulations.

scholarly journals Application of Biotests in Cyanobacterial Extract Toxicity Assessment

2014 ◽  
Vol 40 (3) ◽  
pp. 115-121 ◽  
Author(s):  
Anna Sierosławska ◽  
Anna Rymuszka ◽  
Tadeusz Skowroński
Keyword(s):  
Acute Toxicity ◽  
Daphnia Magna ◽  
Microcystis Aeruginosa ◽  
Tetrahymena Thermophila ◽  
Toxicity Assessment ◽  
Taxonomic Identification ◽  
Dam Reservoir ◽  
Extract Concentration ◽  
Initial Extract ◽  
Toxicity Unit

Abstract The aim of the study was to determine the toxicity of the extract obtained from the cyanobacterial cells derived from the waters of Zemborzycki dam reservoir with use of a battery of biotests. The taxonomic identification of the bloom-forming cyanobacteria revealed high abundance of Aphanizomenon flos-aquae and Dolichospermum spp. (Anabaena spp.) and in a lower degree of Microcystis aeruginosa and Planktothrix agardhii. In the extract obtained from concentrated cyanobacterial cells, hepatotoxin microcystin-LR at a concentration of 22.89 ± 3.74 μg/L and neurotoxin Antx-a at 13.02 ± 0.01 μg/L have been detected. Toxicity of the extract was evaluated with the following assays: Daphtoxkit F magna with the crustacean Daphnia magna, Thamnotoxkit F with the crustacean Thamnocephalus platyurus, Rotoxkit F with the rotifer Brachionus calyciflorus and Protoxkit F with ciliate Tetrahymena thermophila. The most sensitive organism among all studied was T. platyurus for which EC50 was estimated to be 1.2% of the initial extract concentration. On the basis of the highest obtained value of the toxicity unit (TU = 83) the studied sample was classified to the IV class, which is of high acute toxicity. Additionally, it was found that reactivity on cyanobacterial products differs greatly among organisms used in bioassays, which indicate the need for using a set of biotests.

Prediction of acute toxicity of emerging contaminants on the water flea Daphnia magna by Ant Colony Optimization–Support Vector Machine QSTR models

2017 ◽  
Vol 19 (3) ◽  
pp. 438-448 ◽  
Author(s):  
Reza Aalizadeh ◽  
Peter C. von der Ohe ◽  
Nikolaos S. Thomaidis
Keyword(s):  
Support Vector Machine ◽  
Acute Toxicity ◽  
Ant Colony Optimization ◽  
Daphnia Magna ◽  
Emerging Contaminants ◽  
Ant Colony ◽  
Support Vector ◽  
Water Flea

Prediction of acute toxicity towardsDaphnia magnausing Ant Colony Optimization–Support Vector Machine QSTR models.

Acute toxicity assessment of textile dyes and textile and dye industrial effluents using Daphnia magna bioassay

2008 ◽  
Vol 24 (7) ◽  
pp. 491-500 ◽  
Author(s):  
Y Verma
Keyword(s):  
Acute Toxicity ◽  
Daphnia Magna ◽  
Aquatic Toxicity ◽  
Industrial Effluents ◽  
Toxicity Assessment ◽  
Textile Dyes ◽  
Textile Mill ◽  
Golden Yellow ◽  
Excellent Method ◽  
High Degree

Aquatic toxicity of textile dyes and textile and dye industrial effluents were evaluated in an acute toxicity study using Daphnia magna as an aquatic experimental animal model. The 48-h EC50 value for the azo dyes, Remazol Parrot Green was 55.32 mg/L and for Remazol Golden Yellow was 46.84 mg/L. Whereas 48-h EC50 values for three dye industrial effluents (D1, D2, and D3) were 14.12%, 15.52%, and 29.69%, respectively. Similarly, EC50 value for three textile mill effluents (T1, T2, and T3) were >100%, 62.97%, and 63.04%, respectively. These results also showed linear relationship with high degree of confidence ( r2 = >0.84 to >0.99) between immobility and test concentrations. The ratio of 24 to 48-h EC50 remains to be in between 1.1 and 1.2. The general criteria of toxicity classification showed that both dyes were minor acutely toxic having 48-h EC50 in between 10 and 100 mg/L. Of the six textile and dye industrial effluents tested, one was not acutely toxic (48-h EC50 > 100%) and five were minor acutely toxic (48-h EC50 > 14.12–29.69%). The toxicity classification of effluent based on toxic unit (TU) showed that of the six effluents tested five were found toxic (TU = >1) and one was non-toxic (TU = <1). Thus, dye effluents showed highest toxicity and textile effluents lowest toxicity. The study also suggested that the assay with D. magna was an excellent method for evaluation of aquatic toxicity of dyes and dyes containing industrial effluents.

Comparative Evaluation of Effects of .GAMMA.-Rays and Heavy Metals on Mobility of the Water Flea Daphnia magna

RADIOISOTOPES ◽  
2003 ◽  
Vol 52 (7) ◽  
pp. 319-326 ◽  
Author(s):  
Shoichi FUMA ◽  
Nobuyoshi ISHII ◽  
Nobuyuki TANAKA ◽  
Hiroshi TAKEDA ◽  
Kiriko MIYAMOTO ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Daphnia Magna ◽  
Gamma Rays ◽  
Comparative Evaluation ◽  
Water Flea

scholarly journals Uptake and impacts of polyvinylpyrrolidone (PVP) capped metal oxide nanoparticles on Daphnia magna: role of core composition and acquired corona

2018 ◽  
Vol 5 (7) ◽  
pp. 1745-1756 ◽  
Author(s):  
S. M. Briffa ◽  
F. Nasser ◽  
E. Valsami-Jones ◽  
I. Lynch
Keyword(s):  
Metal Oxide ◽  
Daphnia Magna ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Core Composition

A key hypothesis in nanosafety assessment is that the NP core chemistry and eco-corona are primary factors controlling toxicity.

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