Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Dose Response Curve: Conventional Versus Nonmonotonic01:21

Dose Response Curve: Conventional Versus Nonmonotonic

371
The correlation between a drug's dosage and its impact on a biological system is a cornerstone of pharmacology and toxicology. Conventional dose–response curves, which include graded and quantal relationships, are key to this understanding. Graded dose–response curves depict the spectrum of a biological reaction to different doses within an individual, indicating that as the drug dosage increases, so does the intensity of the response. On the other hand, quantal dose–response...
371
Toxicity Testing in Animals01:23

Toxicity Testing in Animals

204
Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...
204
Biological Effects of Radiation02:59

Biological Effects of Radiation

15.4K
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
15.4K
Dose-Response Relationship: Overview01:03

Dose-Response Relationship: Overview

5.2K
Agonists can bind with and activate receptors, resulting in the formation of drug-receptor complexes. Once formed, these complexes catalyze many biochemical processes at the cellular level and subsequently induce a pharmacologic response. The degree of response is directly proportional to the fraction of activated receptors, which in turn, depends on the concentration of the drug at the receptor site as well as the sensitivity of the receptor. An increase in the administered dose contributes to...
5.2K
Dose-Response Relationship: Potency and Efficacy01:22

Dose-Response Relationship: Potency and Efficacy

6.8K
The potency of a drug is the measure of its ability to produce a biological response and can be compared by looking at the half-maximum effective concentration or EC50 values of different drugs. A lower EC50 value indicates higher potency of the drug. In the dose–response curve of two antihypertensive drugs, candesartan and irbesartan, a significant difference is observed in their EC50 values. A lower EC50 value for candesartan indicates that it is more potent than irbesartan, as it...
6.8K
Dose-Response Relationship: Selectivity and Specificity01:25

Dose-Response Relationship: Selectivity and Specificity

10.2K
Drugs exert their therapeutic effects by interacting with receptors, enzymes, or ion channels that are present throughout the human body. The strength and duration of the interaction between a drug and its target receptor are characterized by the selectivity and specificity of the drug. Selectivity refers to a drug's strong preference for its intended target over other targets. For instance, isoprenaline, a non-selective β-adrenergic agonist, interacts with both β1- and...
10.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Correlating Quantitative Measurements of Radical Production by Photocatalytic TiO<sub>2</sub> with Daphnia magna Toxicity.

Environmental toxicology and chemistry·2021
Same author

Toward Sustainable Environmental Quality: Priority Research Questions for North America.

Environmental toxicology and chemistry·2019
Same author

Bioavailability of Carbon Nanomaterial-Adsorbed Polycyclic Aromatic Hydrocarbons to Pimphales promelas: Influence of Adsorbate Molecular Size and Configuration.

Environmental science & technology·2017
Same author

Trophic transfer of microplastics in aquatic ecosystems: Identifying critical research needs.

Integrated environmental assessment and management·2017
Same author

Toxicological effects of fungicide mixtures on the amphipod Austrochiltonia subtenuis.

Environmental toxicology and chemistry·2017
Same author

Effect of natural organic matter on the photo-induced toxicity of titanium dioxide nanoparticles.

Environmental toxicology and chemistry·2016
Same journal

From laboratory to the field: the role of microplastics as vectors of per- and polyfluoroalkyl substances (PFAS) in the environment.

Environmental toxicology and chemistry·2026
Same journal

Polychlorinated biphenyl (PCB) exposure assessment of Carolina wren (Thryothorus ludovicianus) and barn swallow (Hirundo rustica) eggs and nestlings collected along Snow Creek and Choccolocco Creek watersheds near Anniston, Alabama, USA.

Environmental toxicology and chemistry·2026
Same journal

Domestic dog exposure to glyphosate in Australia.

Environmental toxicology and chemistry·2026
Same journal

Toxicity of green energy by-products beryllium and tungsten to temperate freshwater species from a Global Biodiversity Hotspot.

Environmental toxicology and chemistry·2026
Same journal

Biomagnification of Mercury in Wolves and Their Prey in the Northwest Territories, Canada.

Environmental toxicology and chemistry·2026
Same journal

Can forensic aggregate exposure pathways support exposure evaluation in toxic torts?

Environmental toxicology and chemistry·2026
See all related articles

Related Experiment Video

Updated: May 5, 2026

Irradiator Commissioning and Dosimetry for Assessment of LQ &#945; and &#946; Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
06:20

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Published on: March 11, 2021

7.4K

Testing the individual effective dose hypothesis.

Hung T Vu1, Stephen J Klaine

  • 1Clemson University, Department of Biological Sciences, Institute of Environmental Toxicology, Pendleton, South Carolina, USA; Department of Zoology, The University of Melbourne, Parkville, Victoria, Australia.

Environmental Toxicology and Chemistry
|December 10, 2013
PubMed
Summary
This summary is machine-generated.

This study tested whether individual effective dose or stochasticity better explains toxicological responses. Stochasticity, not individual effective dose, accurately described Daphnia magna survival and reproduction when exposed to copper sulfate pulses.

Keywords:
Aquatic InvertebratesCopperIEDStochasticToxic Effects

More Related Videos

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation
10:33

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation

Published on: September 4, 2017

19.7K
Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator
07:31

Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator

Published on: May 9, 2014

13.1K

Related Experiment Videos

Last Updated: May 5, 2026

Irradiator Commissioning and Dosimetry for Assessment of LQ &#945; and &#946; Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
06:20

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Published on: March 11, 2021

7.4K
Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation
10:33

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation

Published on: September 4, 2017

19.7K
Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator
07:31

Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator

Published on: May 9, 2014

13.1K

Area of Science:

  • Environmental Toxicology
  • Aquatic Toxicology
  • Ecotoxicology

Background:

  • The probit method, widely used in toxicology, assumes individual effective dose (IED) or innate tolerance.
  • Stochasticity offers an alternative, proposing random processes influence mortality in similar individuals.
  • The validity of the IED assumption in dose-response analysis remains largely untested.

Purpose of the Study:

  • To rigorously test whether the individual effective dose (IED) or stochasticity assumption better explains Daphnia magna responses.
  • To evaluate these assumptions using copper sulfate (CuSO4) exposure data in a controlled experimental setting.

Main Methods:

  • Daphnia magna were exposed to pulsed copper sulfate (CuSO4) over 24 days.
  • Age-dependent 24-h median lethal concentrations (LC50s) and copper depuration rates were determined.
  • Organisms were exposed to four 24-h copper exposures with recovery periods in copper-free media.

Main Results:

  • Median lethal concentrations (LC50s) for copper decreased with increasing organism age.
  • Copper depuration in Daphnia magna was independent of age and copper concentration, with 5 days sufficient for recovery.
  • Stochasticity provided a more appropriate explanation for survival and reproduction data compared to the IED assumption.

Conclusions:

  • The study challenges the universal applicability of the individual effective dose (IED) assumption in toxicological dose-response analysis.
  • Stochasticity effectively explains the observed survival and reproduction patterns in Daphnia magna under pulsed copper exposure.
  • Findings suggest a need to reconsider the underlying assumptions of common toxicological models.