scholarly journals Acute toxic effects of the cyanobacterium Microcystis aeruginosa on Daphnia magna 1

1986 ◽  
Vol 31 (3) ◽  
pp. 497-502 ◽  
Author(s):  
Shulamit Nizan ◽  
Chanan Dimentman ◽  
Moshe Shilo
Keyword(s):  
Daphnia Magna ◽  
Microcystis Aeruginosa ◽  
Toxic Effects ◽  
Acute Toxic

scholarly journals Eco-Safety Assessment of Glyoxal-Containing Cellulose Ether on Freeze-Dried Microbial Strain, Cyanobacteria, Daphnia, and Zebrafish

2017 ◽  
Author(s):  
Chang-Beom Park ◽  
Min Ju Song ◽  
Nak Woon Choi ◽  
Sunghoon Kim ◽  
Hyun Pyo Jeon ◽  
...  
Keyword(s):  
Daphnia Magna ◽  
Microcystis Aeruginosa ◽  
Aquatic Organisms ◽  
Toxic Effects ◽  
Toxicity Tests ◽  
Cellulose Ether ◽  
Zebrafish Embryos ◽  
Freeze Dried ◽  
Microbial Strains

The objective of this study is to investigate the aquatic-toxic effects of glyoxal-containing cellulose ether with four different glyoxal concentrations (0, 1.4, 2.3 and 6.3%) in response to global chemical regulations, e.g., European Union Classification, Labeling and Packaging (EU CLP). Tests of the aquatic-toxic effects of glyoxal-containing cellulose ether on 11 freeze-dried microbial strains, Microcystis aeruginosa, Daphnia magna and zebrafish embryos were designed as an initial stage for toxicity screening, and were performed with the standardized toxicity test guidelines. Glyoxal-containing cellulose ether showed no significant toxic effects in the toxicity tests for the 11 freeze-dried microbial strains, Daphnia magna and zebrafish embryos. Alternatively, 6.3% glyoxal-containing cellulose ether led to more than a 60% reduction of Microcystis aeruginosa growth after 7 days of exposure. Approximately 10% developmental abnormalities (e.g., bent spine) in zebrafish embryos were also observed in the group exposed to 6.3% glyoxal-containing cellulose ether after 6 days of exposure. These results imply that <6.3% glyoxal-containing cellulose ether results in non-toxic effects on the acute toxicity of aquatic organisms. However, ≥6.3% glyoxal-containing cellulose ether may affect the health of aquatic organisms with long-term exposure. In order to better evaluate the eco-safety of cellulosic products contained in glyoxal, further studies regarding the toxic effects of glyoxal-containing cellulose ether with long-term exposure are required. The results from this study allow us to evaluate the auatic-toxic effects of glyoxal-containing cellulosic products, under EU chemical regulations, on the health of aquatic organisms.

The acute toxic effects of 1-alkyl-3-methylimidazolium nitrate ionic liquids on Chlorella vulgaris and Daphnia magna

2017 ◽  
Vol 229 ◽  
pp. 887-895 ◽  
Author(s):  
Cheng Zhang ◽  
Shuai Zhang ◽  
Lusheng Zhu ◽  
Jinhua Wang ◽  
Jun Wang ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Daphnia Magna ◽  
Chlorella Vulgaris ◽  
Toxic Effects ◽  
Acute Toxic

Acute toxic effects of sodium selenate on the epiphyseal plate of the rat

1971 ◽  
Vol 7 (1) ◽  
pp. 318-330 ◽  
Author(s):  
Robert D. Campo ◽  
Robert J. Bielen
Keyword(s):  
Epiphyseal Plate ◽  
Toxic Effects ◽  
Sodium Selenate ◽  
Acute Toxic

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.

scholarly journals UJI TOKSISITAS AKUT MINUMAN PROBIOTIK SIRSAK GUNUNG (Annona montana Macf.) DENGAN METODE BSLT (Brine Shrimp Lethality Test)

2020 ◽  
Vol 1 (5) ◽  
pp. 941-948
Author(s):  
Ambar Fidyasari ◽  
Sentot Joko Raharjo ◽  
Melani Setyowati
Keyword(s):  
Acute Toxicity ◽  
Traditional Medicine ◽  
Brine Shrimp ◽  
Experimental Methods ◽  
Test Method ◽  
Toxic Effects ◽  
Brine Shrimp Lethality ◽  
Lc50 Value ◽  
A Value ◽  
Acute Toxic

Soursop fruit (Annona montana Macf.) is one of the plants can be used as as traditional medicine. This plant contains terpenoid and acetogenin which can cause toxicity. The fruit has a flavor that is tasteless so the innovation becomes probiotic drinks. This drink has been proven as an antioxidant, antibacterial, antihyperuricemia and antidiarrheal. The aim of this study was to know about acute toxicity of probiotic drink of soursop juice using brine shrimp lethality test method which will be indicated by LC50 value. This study used experimental methods conducted in the Laboratory of Farmakoknosi. There are several variations in concentration in this study, namely 10000 ppm, 20000 ppm, 30000 ppm, 40000 ppm, 50000 ppm, 60000 ppm, 70000 ppm, 80000 ppm and replication was done 3 times with total number of test animals used was 270. The results showed that probiotic drink of soursop juice can provide acute toxic effects on test animals with LC50 value of 29717,23 ppm. LC50 values ​​indicate that the mountain soursop probiotic drink is not potentially toxic because it has a value of >1000 ppm.

Environmental risks of ZnO nanoparticle exposure on Microcystis aeruginosa: Toxic effects and environmental feedback

2018 ◽  
Vol 204 ◽  
pp. 19-26 ◽  
Author(s):  
Yulin Tang ◽  
Huaijia Xin ◽  
Shu Yang ◽  
Meiting Guo ◽  
Tyler Malkoske ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Environmental Risks ◽  
Toxic Effects ◽  
Zno Nanoparticle ◽  
Nanoparticle Exposure ◽  
Environmental Feedback
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