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

The Evidence for Evolution02:55

The Evidence for Evolution

48.3K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
48.3K
Subatomic Particles03:37

Subatomic Particles

113.5K
Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom.
113.5K
The Nucleosome Core Particle02:10

The Nucleosome Core Particle

14.5K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
14.5K
The Nucleosome Core Particle01:12

The Nucleosome Core Particle

2.4K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
2.4K
Air-entraining Agents01:27

Air-entraining Agents

276
Air-entraining agents improve the durability and workability of concrete in climates with frequent freezing and thawing. These agents prevent cracks by introducing small air bubbles into the mix, creating spaces accommodating water expansion when temperatures drop. The air-entraining agents lower the surface tension of water, forming stable, small air bubbles. This method is more effective than having accidental large voids, as the intentional, smaller, and evenly distributed air voids improve...
276
Effects of Air-entrainment in Concrete01:28

Effects of Air-entrainment in Concrete

394
Air entrainment in concrete significantly enhances the material's durability, especially in environments subjected to freeze-thaw cycles. Introducing small air bubbles into the concrete mix acts as internal voids that accommodate the expansion of water when it freezes, thereby alleviating internal stress and preventing structural cracks. This function is crucial in climates with significant freezing and thawing, as it protects the concrete from repeated stresses that could lead to premature...
394

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Tooth-bone attachment tissue is produced by cells with a mixture of odontoblastic and osteoblastic features in reptiles.

Journal of anatomy·2025
Same author

Impact of Heatwaves and Declining NO<sub>x</sub> on Nocturnal Monoterpene Oxidation in the Urban Southeastern United States.

Journal of geophysical research. Atmospheres : JGR·2024
Same author

Treatment adherence to olfactory training: a real-world observational study.

Rhinology·2023
Same author

Predictors of mortality, ICU hospitalization, and extrapulmonary complications in COVID-19 patients.

Infectious diseases now·2021
Same author

Methodology and applications of elemental mapping by laser induced breakdown spectroscopy.

Analytica chimica acta·2021
Same author

Coordinated labio-lingual asymmetries in dental and bone development create a symmetrical acrodont dentition.

Scientific reports·2020

Video Experimental Relacionado

Updated: Feb 8, 2026

Author Spotlight: Advancing Place-Based Biochar Production for Ecosystem Restoration and Soil Health
03:42

Author Spotlight: Advancing Place-Based Biochar Production for Ecosystem Restoration and Soil Health

Published on: April 5, 2024

1.6K

La contaminación del aire. La evidencia se acumula de que las partículas diminutas pueden matar.

J Kaiser

    Science (New York, N.Y.)
    |August 6, 2000
    PubMed
    Resumen

    Un nuevo estudio confirma que la contaminación por partículas finas (PM) está relacionada con el exceso de muertes, lo que respalda las anteriores regulaciones de la Agencia de Protección Ambiental (EPA). Esta investigación proporciona pruebas sólidas que implican a los contaminantes del aire en la mortalidad prematura.

    Área de la Ciencia:

    Más Videos Relacionados

    Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India
    09:33

    Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India

    Published on: December 23, 2022

    3.0K
    Studying Neurobehavioral Effects of Environmental Pollutants on Zebrafish Larvae
    07:06

    Studying Neurobehavioral Effects of Environmental Pollutants on Zebrafish Larvae

    Published on: February 5, 2020

    6.6K

    Videos de Experimentos Relacionados

    Last Updated: Feb 8, 2026

    Author Spotlight: Advancing Place-Based Biochar Production for Ecosystem Restoration and Soil Health
    03:42

    Author Spotlight: Advancing Place-Based Biochar Production for Ecosystem Restoration and Soil Health

    Published on: April 5, 2024

    1.6K
    Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India
    09:33

    Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India

    Published on: December 23, 2022

    3.0K
    Studying Neurobehavioral Effects of Environmental Pollutants on Zebrafish Larvae
    07:06

    Studying Neurobehavioral Effects of Environmental Pollutants on Zebrafish Larvae

    Published on: February 5, 2020

    6.6K
    • Ciencias de la salud ambiental Ciencias de la salud ambiental.
    • Epidemiología La epidemiología.
    • Toxicología Toxicología.

    Sus antecedentes:

    • La Agencia de Protección Ambiental de los Estados Unidos (EPA, por sus siglas en inglés) estableció previamente estándares de calidad del aire para las partículas en suspensión (PM, por sus siglas en inglés) basándose en pruebas que la vinculaban con resultados adversos para la salud.
    • Estas regulaciones se enfrentaron a una oposición significativa de grupos industriales y algunos científicos que cuestionaron la conclusividad de los datos subyacentes con respecto a la mortalidad.
    • Se produjo un polémico debate sobre el impacto en la salud pública del polvo fino y las partículas de hollín.