<abstract xmlns="http://www.w3.org/1999/xhtml">Determining the value of a half-effective or half-life concentration or dose of toxicant is the main purpose of acute toxicity studies, and this is also the most commonly used value in the toxicity characteristics of substances. By conducting tests that meet the criteria and requirements for the determination of acute toxicity, due to the use of appropriate mathematical tools and concentrations resulting in complete lethal effects in the studied groups, considerably more important values can be achieved, which give a possibility for the analysis of the entire process’s dynamics, as well as determining the threshold values of the effect time and toxicant concentration. This was the purpose of our research, in which the research species were <italic>Daphnia magna</italic> and <italic>Cypris pubera</italic>. The effect of the conducted research allowed to determine and compare the two toxicants: ammonium and copper(II) ions by it’s: concentration limit values (<italic>C</italic><italic>th</italic>), internal toxicity of the receptor-ligand complex (<italic>α</italic>), apparent, constant disintegration of this complex (<italic>K</italic><italic>app</italic>) and different time values of the effect (<italic>Tt</italic>, <italic>Tin</italic>, <italic>MLT</italic>), which, along with concentration, is equally important determinant of the development of a toxic effect.</abstract>

Determining the value of a half-effective or half-life concentration or dose of toxicant is the main purpose of acute toxicity studies, and this is also the most commonly used value in the toxicity characteristics of substances. By conducting tests that meet the criteria and requirements for the determination of acute toxicity, due to the use of appropriate mathematical tools and concentrations resulting in complete lethal effects in the studied groups, considerably more important values can be achieved, which give a possibility for the analysis of the entire process’s dynamics, as well as determining the threshold values of the effect time and toxicant concentration. This was the purpose of our research, in which the research species were Daphnia magna and Cypris pubera. The effect of the conducted research allowed to determine and compare the two toxicants: ammonium and copper(II) ions by it’s: concentration limit values (Cth), internal toxicity of the receptor-ligand complex (α), apparent, constant disintegration of this complex (Kapp) and different time values of the effect (Tt, Tin, MLT), which, along with concentration, is equally important determinant of the development of a toxic effect.

Characteristics of Acute Toxicity Dynamics of Selected Toxicants on Aquatic Crustaceans

Institute of Biotechnology and Molecular Biology

Ecological Chemistry and Engineering S

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Determining the value of a half-effective or half-life concentration or dose of toxicant is the main purpose of acute toxicity studies, and this is also the...

Characteristics of Acute Toxicity Dynamics of Selected Toxicants on Aquatic Crustaceans

Published Online: Jul 18, 2019

Page range: 397 - 408

DOI: https://doi.org/10.1515/eces-2019-0028

Keywords
acute toxicity, copper and ammonium ions, threshold concentration,

© 2019 Olga Żuk et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Characteristics of Acute Toxicity Dynamics of Selected Toxicants on Aquatic Crustaceans

Published Online: Jul 18, 2019

Page range: 397 - 408

DOI: https://doi.org/10.1515/eces-2019-0028

Keywordsacute toxicity, copper and ammonium ions, threshold concentration,

© 2019 Olga Żuk et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
acute toxicity, copper and ammonium ions, threshold concentration,