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Plastic Deformations01:19

Plastic Deformations

230
Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
230
Plasticity00:58

Plasticity

2.6K
Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
2.6K
Plastic Behavior01:21

Plastic Behavior

326
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
326
Plasticizers01:31

Plasticizers

146
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
146

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Updated: Oct 23, 2025

Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis
10:12

Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis

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Plastic pollution: When do we know enough?

Alice A Horton1

  • 1National Oceanography Centre, European Way, Southampton SO14 3ZH, UK.

Journal of Hazardous Materials
|August 21, 2021
PubMed
Summary
This summary is machine-generated.

Immediate action is crucial to combat plastic pollution. Addressing misconceptions and promoting coordinated research and mitigation strategies are essential for reducing environmental harm from plastics.

Keywords:
ExposureHazardMicroplastics and nanoplasticsPrecautionary principleRisk

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Area of Science:

  • Environmental Science
  • Environmental Chemistry
  • Ecology

Background:

  • Plastic pollution presents a significant global environmental challenge.
  • Growing research enhances risk prediction and informs mitigation strategies.
  • Existing evidence mandates urgent, widespread action to curb plastic release.

Purpose of the Study:

  • To outline key considerations for advancing research on plastic pollution.
  • To recommend actionable strategies for mitigating plastic harm.
  • To address misconceptions surrounding plastic pollution and its solutions.

Main Methods:

  • This perspective article synthesizes current knowledge on plastic pollution.
  • It identifies critical areas for future research and policy development.
  • It emphasizes the need for a multi-stakeholder approach.

Main Results:

  • Sufficient evidence exists to warrant immediate, broad-scale interventions.
  • Contrasting opinions and knowledge gaps require careful consideration.
  • A coordinated effort is necessary to tackle the multifaceted issue of plastic pollution.

Conclusions:

  • Urgent and widespread action is imperative to reduce plastic pollution.
  • Addressing misconceptions and fostering collaboration are key to effective solutions.
  • Moving forward requires integrated research and mitigation efforts.