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The Periodic Table and Organismal Elements01:27

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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.
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Antidotes01:17

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Antidotes are medicinal substances used to counteract the harmful effects of toxins or drugs in the body. They function in various ways, each uniquely designed to combat specific toxic compounds.
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Chronic liver disease significantly impacts drug metabolism due to alterations in hepatic blood flow and enzyme accessibility. This disruption affects the body's pharmacokinetics—the movement and processing of drugs within the system. Key enzymes crucial for metabolizing medications become less accessible, changing how drugs are processed and utilized. Furthermore, liver disease influences the synthesis of plasma proteins, such as albumin and globulins, which play critical roles in drug...
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Extraction: Advanced Methods00:56

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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...
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Anticholinesterases, also known as cholinesterase inhibitors, work by blocking the breakdown of acetylcholine, leading to its accumulation in the synaptic cleft. This accumulation indirectly enhances both muscarinic and nicotinic actions. These agents are classified as reversible or irreversible based on their mechanism of action.     
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When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
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Updated: Oct 16, 2025

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Copper Toxicity in Horses: Does it Exist?

Carla Bargi Belli1, Wilson Roberto Fernandes1, Luciana Neves Torres2

  • 1Department of Internal Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo - SP, Brazil.

Journal of Equine Veterinary Science
|October 21, 2021
PubMed
Summary
This summary is machine-generated.

Copper toxicity is an emerging concern in horses, particularly in Brazil. This condition, often linked to environmental copper exposure, requires veterinary attention and preventive strategies.

Keywords:
FoodHeinz bodiesHemoglobinuriaHemolysisHorse

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Area of Science:

  • Veterinary Medicine
  • Toxicology
  • Equine Health

Background:

  • Copper toxicity is historically considered rare in horses.
  • Recent case numbers are increasing in Brazil, prompting further investigation.

Observation:

  • Five cases of copper toxicity were reported across four properties, affecting at least 15 horses.
  • Clinical signs included hemolytic anemia, hemoglobinuria, Heinz bodies, and elevated liver enzymes (AST, GGT).

Findings:

  • Diagnosis involved clinical signs, laboratory results, copper level analysis in feed/soil, and histopathology.
  • Excess copper exposure was linked to poultry litter soil fertilization and copper-based agricultural products.
  • Recurring episodes were noted in two horses, an unusual presentation for copper toxicity.

Implications:

  • Copper toxicity in horses is a growing concern with diverse potential causes.
  • The condition warrants inclusion in differential diagnoses for affected horses.
  • Preventive measures for equine diets and pasture management are crucial to mitigate risks.