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Related Concept Videos

The Periodic Table and Organismal Elements01:27

The Periodic Table and Organismal Elements

Elements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally occurring, and only a few of them are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.
Periodic Table Provides Information...
The Periodic Table and Organismal Elements00:57

The Periodic Table and Organismal Elements

OverviewElements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally-occurring, and fewer still are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.The Periodic Table Provides Information...
Types of Toxins01:36

Types of Toxins

Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Toxicity Testing in Animals01:23

Toxicity Testing in Animals

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...
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...
Sources of Food Contamination01:29

Sources of Food Contamination

Contamination of food by microbial agents and natural toxins poses significant risks to public health. These hazards can be introduced at various points across the food supply chain, ranging from environmental sources to processing and storage stages. Understanding these contamination pathways is critical for developing strategies to ensure food safety.Seafood is particularly vulnerable to contamination through both environmental exposure and microbial colonization. Toxins from harmful algal...

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Related Experiment Video

Updated: May 30, 2026

Rearing the Cabbage White Butterfly (Pieris rapae) in Controlled Conditions: A Case Study with Heavy Metal Tolerance
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Rearing the Cabbage White Butterfly (Pieris rapae) in Controlled Conditions: A Case Study with Heavy Metal Tolerance

Published on: August 18, 2023

Heavy metals: Implications associated to fish consumption.

M I Castro-González1, M Méndez-Armenta

  • 1Depto. Nutrición Animal, Instituto Nacional de Ciencias Médicas y Nutrición SZ, Mexico.

Environmental Toxicology and Pharmacology
|July 28, 2011
PubMed
Summary
This summary is machine-generated.

Heavy metals like mercury and lead pose health risks. While fish is healthy, its heavy metal content complicates dietary recommendations, necessitating further research into toxic metal effects.

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An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium
09:33

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

Published on: December 17, 2018

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Last Updated: May 30, 2026

Rearing the Cabbage White Butterfly (Pieris rapae) in Controlled Conditions: A Case Study with Heavy Metal Tolerance
08:08

Rearing the Cabbage White Butterfly (Pieris rapae) in Controlled Conditions: A Case Study with Heavy Metal Tolerance

Published on: August 18, 2023

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium
09:33

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

Published on: December 17, 2018

Area of Science:

  • Environmental Health
  • Toxicology
  • Nutritional Science

Background:

  • Heavy metals (mercury, cadmium, lead, arsenic) are widely used in industry and agriculture.
  • These metals pose significant threats to human health due to various adverse effects.
  • Fish consumption is encouraged for omega-3 fatty acids but can be a source of heavy metal exposure.

Purpose of the Study:

  • To review recent evidence on the health effects of toxic heavy metals.
  • To examine the implications of heavy metal contamination in fish for human consumption.
  • To clarify the role of fish consumption in a healthy diet amidst heavy metal concerns.

Main Methods:

  • Literature review of recent scientific evidence.
  • Analysis of toxicological data on heavy metals.
  • Evaluation of nutritional data concerning fish consumption.

Main Results:

  • Documented adverse health effects linked to mercury, cadmium, lead, and arsenic exposure.
  • Identification of fish as a potential dietary source of these toxic metals.
  • Uncertainty regarding the net health benefits of fish consumption due to contamination.

Conclusions:

  • Heavy metal contamination in fish presents a complex challenge for dietary guidelines.
  • Understanding the balance between omega-3 benefits and heavy metal risks is crucial.
  • Further research is needed to assess the overall impact of fish consumption on human health in contaminated environments.