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Related Concept Videos

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...
Pharmaceutical Poisoning: Potential Scenarios01:26

Pharmaceutical Poisoning: Potential Scenarios

Pharmaceutical poisoning can occur through various channels, impacting an estimated 2 million hospitalized patients in the U.S. annually with serious adverse drug responses. These scenarios encompass both therapeutic uses, such as drug toxicity, where even standard dosages can lead to severe central nervous system depression, and non-therapeutic exposures, including accidental ingestion by children, and environmental and occupational exposures.Unintentional poisonings often involve exploratory...
Strategies for Assessing and Addressing Confounding01:25

Strategies for Assessing and Addressing Confounding

Confounding is a critical issue in epidemiological studies, often leading to misleading conclusions about associations between exposures and outcomes. It occurs when the relationship between the exposure and the outcome is mixed with the effects of other factors that influence the outcome. Given that, addressing confounding is of high importance for drawing accurate inferences in research.
Confounding can be addressed at both the design phase of a study and through analytical methods after data...
Gene-Environment Interactions01:20

Gene-Environment Interactions

Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
Toxic Reactions: Overview01:26

Toxic Reactions: Overview

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.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
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...

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Advanced 3D Liver Models for In vitro Genotoxicity Testing Following Long-Term Nanomaterial Exposure
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Published on: June 5, 2020

Environmental exposure scenarios: development, challenges and possible solutions.

Andreas Ahrens1, Theo P Traas

  • 1Institute for Environmental Strategies, Okopol GmbH, Nernstweg 32-34, Hamburg 22765, Germany. ahrens@oekopol.de

Journal of Exposure Science & Environmental Epidemiology
|November 15, 2007
PubMed
Summary

The EU's REACH regulation mandates safety assessments for chemicals, requiring companies to register substances and manage risks. This system aims to prevent or limit exposure to hazardous industrial chemicals, protecting human health and the environment.

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Area of Science:

  • Environmental Science
  • Chemical Safety
  • Regulatory Affairs

Background:

  • The Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) system imposes new obligations on companies.
  • Approximately 10,000 existing chemical substances in the EU market, exceeding 10 t/year, require registration and safety assessment.
  • Hazardous substances necessitate exposure assessment and risk characterization for all identified uses.

Purpose of the Study:

  • To explain the safety assessment concept under REACH, focusing on environmental exposure.
  • To define conditions for adequate risk control for workplace safety, consumer protection, and environmental health.
  • To highlight challenges and propose solutions for managing environmental exposure to chemicals.

Main Methods:

  • Registration of single chemical substances above 10 t/year.
  • Conducting hazard, exposure, and risk assessments for identified uses.
  • Communicating safety information via Extended Safety Data Sheets (eSDS).

Main Results:

  • REACH establishes systematic duties to prevent or limit exposure to dangerous industrial chemicals.
  • Safety assessments define conditions for controlling risks to health, safety, and the environment.
  • The study focuses on environmental exposure, detailing challenges and potential solutions.

Conclusions:

  • The REACH system aims to systematically prevent or limit exposure to dangerous industrial chemicals.
  • Effective communication of safety conditions down the supply chain is crucial.
  • Addressing environmental exposure challenges is key to the successful implementation of REACH.