Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Plasticizers01:31

Plasticizers

156
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...
156
The Carbon Cycle01:14

The Carbon Cycle

42.2K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
42.2K
Plastic Deformations01:19

Plastic Deformations

235
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...
235
Plastic Deformations01:14

Plastic Deformations

216
It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
216
Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

2.4K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.4K
Environmental Applications of Microorganisms01:30

Environmental Applications of Microorganisms

524
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
524

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Warming substantially amplifies Antarctic coastal polynyas as key carbon sinks.

Proceedings of the National Academy of Sciences of the United States of America·2025
Same author

Contrasting Size Dependence of Photochemical Lifetimes of Polypropylene and Expanded Polystyrene Microplastics in Surface Waters.

Environmental science & technology·2025
Same author

The distribution of subsurface microplastics in the ocean.

Nature·2025
Same author

Warming-induced retreat of West Antarctic glaciers weakened carbon sequestration ability but increased mercury enrichment.

Nature communications·2025
Same author

Sunlight-Driven Photochemical Removal of Polypropylene Microplastics from Surface Waters Follows Linear Kinetics and Does Not Result in Fragmentation.

Environmental science & technology·2024
Same author

Molecular Signatures of Dissolved Organic Matter Generated from the Photodissolution of Microplastics in Sunlit Seawater.

Environmental science & technology·2023

Video Experimental Relacionado

Updated: Oct 30, 2025

Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
13:38

Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture

Published on: May 10, 2013

31.0K

El plástico en el sistema terrestre

Aron Stubbins1,2, Kara Lavender Law3, Samuel E Muñoz4

  • 1Department of Marine and Environmental Sciences and Department of Civil and Environmental Engineering, Northeastern University, Boston, MA 02115, USA. aron.stubbins@northeastern.edu.

Science (New York, N.Y.)
|July 2, 2021
PubMed
Resumen
Este resumen es generado por máquina.

Los plásticos son un importante contaminante ambiental, rivalizando con el carbono natural en algunos ecosistemas. Los geoquímicos deberían analizar los plásticos como geomateriales emergentes para comprender su impacto en los sistemas de la Tierra.

Más Videos Relacionados

Separation and Identification of Conventional Microplastics from Farmland Soils
14:10

Separation and Identification of Conventional Microplastics from Farmland Soils

Published on: March 21, 2025

2.3K
Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies
08:21

Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies

Published on: July 27, 2022

4.5K

Videos de Experimentos Relacionados

Last Updated: Oct 30, 2025

Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
13:38

Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture

Published on: May 10, 2013

31.0K
Separation and Identification of Conventional Microplastics from Farmland Soils
14:10

Separation and Identification of Conventional Microplastics from Farmland Soils

Published on: March 21, 2025

2.3K
Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies
08:21

Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies

Published on: July 27, 2022

4.5K

Área de la Ciencia:

  • Geoquímica
  • Ciencias del medio ambiente
  • Ciencias del Sistema Terrestre

Sus antecedentes:

  • La contaminación por plástico es un problema generalizado en todo el mundo.
  • La composición elemental de los plásticos, principalmente el carbono, es significativa.
  • Los análisis ambientales existentes a menudo pasan por alto el impacto geológico de los plásticos.

Objetivo del estudio:

  • Proponer la consideración de los plásticos como geomateriales emergentes.
  • Destacar la necesidad de incorporar los plásticos en los análisis geoquímicos.
  • Para explorar la utilidad de los plásticos como trazadores en la ciencia del sistema terrestre.

Principales métodos:

  • Análisis comparativo de las existencias y flujos de plástico y carbono.
  • Evaluación geoquímica de los plásticos en los ecosistemas.
  • Utilizando plásticos como trazadores a escala global.

Principales resultados:

  • Las cantidades de plástico en algunos ecosistemas son comparables al carbono orgánico natural.
  • Los plásticos representan una nueva entrada química en los sistemas de la Tierra.
  • Los plásticos ofrecen potencial como indicadores para los procesos del sistema de la Tierra.

Conclusiones:

  • Los plásticos deben ser reconocidos y estudiados como geomateriales.
  • Los enfoques geoquímicos son cruciales para comprender los plásticos en el sistema de la Tierra.
  • Los plásticos pueden servir como trazadores valiosos para el avance de la ciencia del sistema terrestre.