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Related Concept Videos

Toxicity Testing in Animals01:23

Toxicity Testing in Animals

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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...
222

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[Analysis performance of biological toxicity testing MTOXPlate using microplate].

Yi-Yun Lin1, Guo-Xia Zhang, Li-Ping He

  • 1Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou 510070, China. linyiyun2006@163.com

Huan Jing Ke Xue= Huanjing Kexue
|November 7, 2013
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Summary

The MTOXPlate effectively measures the biological toxicity of heavy metals and phenolic compounds using dehydrogenase activity inhibition. This method accurately assesses the toxicity of surface water, sewage, and dyeing wastewater.

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Area of Science:

  • Environmental Science
  • Toxicology
  • Microbiology

Background:

  • Heavy metals and phenolic compounds pose significant environmental and health risks.
  • Assessing the biological toxicity of various water types is crucial for environmental protection.

Purpose of the Study:

  • To evaluate the performance of the MTOXPlate for determining the biological toxicities of heavy metals (Hg2+, Cd2+, Cr6+, Pb2+) and phenolic compounds (2,4-DCP, 2-CP, 4-CP, 2-NP, 4-NP).
  • To assess the MTOXPlate's capability in analyzing the toxicity of surface water, sewage, and dyeing wastewater.

Main Methods:

  • Utilized the MTOXPlate assay with 11 genetically diverse microorganisms.
  • Measured the endpoint of dehydrogenase activity inhibition to determine toxicity.
  • Calculated EC50 values for individual contaminants and assessed inhibition percentages for water samples.

Main Results:

  • The MTOXPlate demonstrated good performance in toxicity analysis for heavy metals and phenolic compounds.
  • Specific EC50 values were determined for Hg2+, Cd2+, Cr6+, Pb2+, 2,4-DCP, 2-CP, 4-CP, 2-NP, and 4-NP.
  • Surface water showed <20% dehydrogenase activity inhibition, while sewage and dyeing wastewater had EC50 values of 62.19% and 16.42%, respectively.

Conclusions:

  • The MTOXPlate is a reliable technology for biological toxicity testing.
  • This method accurately reflects the actual toxicity of surface water, sewage, and dyeing wastewater.