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

Carbon Skeletons01:12

Carbon Skeletons

84.7K
Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
84.7K
The Carbon Cycle01:14

The Carbon Cycle

32.8K
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.
32.8K
Applications of the Ideal Gas Law: Molar Mass, Density, and Volume03:43

Applications of the Ideal Gas Law: Molar Mass, Density, and Volume

64.1K
The volume occupied by one mole of a substance is its molar volume. The ideal gas law, PV = nRT, suggests that the volume of a given quantity of gas and the number of moles in a given volume of gas vary with changes in pressure and temperature. At standard temperature and pressure, or STP (273.15 K and 1 atm), one mole of an ideal gas (regardless of its identity) has a volume of about 22.4 L — this is referred to as the standard molar volume.
64.1K
Phase Diagrams02:39

Phase Diagrams

45.6K
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
45.6K
Network Covalent Solids02:18

Network Covalent Solids

12.9K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
12.9K
Carbonation Shrinkage01:24

Carbonation Shrinkage

666
Atmospheric CO2 penetrates the concrete's pores and, in the presence of moisture, forms carbonic acid, which then reacts with calcium hydroxide in the hydrated cement, forming calcium carbonate. This process reduces the concrete's volume and is termed carbonation shrinkage.
The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction...
666

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Investigating the effect of progressive truncations at the ALS-linked protein TDP-43 RRM2 on its aggregation mechanism.

Frontiers in molecular biosciences·2026
Same author

Non-equilibrium phase transitions in hybrid Voronoi models of cell colonies.

Soft matter·2026
Same author

3D bone printing via ultrasound-mediated osteogenic differentiation of stem cells (3DBonUS).

Biofabrication·2026
Same author

α-Synuclein and γ-Tubulin Cooperatively Regulate Activity-Evoked Presynaptic Microtubule Nucleation to Gate Dopamine Release.

bioRxiv : the preprint server for biology·2026
Same author

Discovery of a low-density filled-ice phase in nitrogen hydrate at high pressure.

Communications chemistry·2026
Same author

Iloperidone treatment mitigates the Juvenile Huntington's Disease phenotype possibly via Sigma-1 Receptor Modulation.

The FEBS journal·2026

Video Experimental Relacionado

Updated: May 5, 2026

Preparing Silica Aerogel Monoliths via a Rapid Supercritical Extraction Method
06:54

Preparing Silica Aerogel Monoliths via a Rapid Supercritical Extraction Method

Published on: February 28, 2014

21.0K

Dióxido de carbono amorfo parecido a la sílice.

Mario Santoro1, Federico A Gorelli, Roberto Bini

  • 1LENS, European Laboratory for Non-linear Spectroscopy and INFM, Via N. Carrara 1, I-50019 Sesto Fiorentino, Firenze, Italy. santoro@lens.unifi.it

Nature
|June 17, 2006
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores sintetizaron una nueva forma amorfa de dióxido de carbono (a-CO2), llamada dióxido de carbono.

Más Videos Relacionados

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
09:31

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Published on: March 27, 2019

8.9K
Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
08:00

Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture

Published on: September 29, 2023

3.1K

Videos de Experimentos Relacionados

Last Updated: May 5, 2026

Preparing Silica Aerogel Monoliths via a Rapid Supercritical Extraction Method
06:54

Preparing Silica Aerogel Monoliths via a Rapid Supercritical Extraction Method

Published on: February 28, 2014

21.0K
Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
09:31

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Published on: March 27, 2019

8.9K
Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
08:00

Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture

Published on: September 29, 2023

3.1K

Área de la Ciencia:

  • Ciencia de los materiales Ciencia de los materiales.
  • Química Química es la química.
  • Física Física es la física de las cosas.

Sus antecedentes:

  • El dióxido de carbono (CO2) típicamente forma enlaces dobles con el oxígeno.
  • A diferencia de la sílice (SiO2) y la germania (GeO2), el CO2 amorfo no se ha sintetizado en condiciones ambientales.
  • Las anteriores formas amorfas de CO2 eran sólo teóricas, predichas por simulaciones.

Objetivo del estudio:

  • Para sintetizar y caracterizar una nueva forma amorfa, similar a la sílice, de dióxido de carbono (a-CO2).
  • Para investigar los cambios estructurales y de unión en el CO2 bajo alta presión y temperatura.
  • Para determinar si a-CO2 es estructuralmente homólogo a otros vidrios de dióxido de grupo IV.

Principales métodos:

  • Compresión de CO2 molecular (fase III) entre 40 y 48 GPa a temperatura ambiente.
  • Análisis utilizando espectroscopia infrarroja para observar la formación de enlaces y las firmas moleculares.
  • Caracterización utilizando espectroscopia Raman y difracción de rayos X de sincrotrón para la confirmación de la estructura amorfa.

Principales resultados:

  • Síntesis exitosa de una forma amorfa y no molecular de dióxido de carbono ("a-carbonia").
  • Transformación observada de enlaces dobles C=O a enlaces simples C-O bajo presión.
  • Se confirmó la estructura amorfa y la homología estructural con sílice amorfa y germania.

Conclusiones:

  • La clase de sistemas desordenados que forman redes ahora incluye el dióxido de carbono amorfo (a-CO2).
  • Este descubrimiento amplía nuestra comprensión de los dioxidos del grupo IV y sus fases amorfas.
  • a-CO2 representa un nuevo material con aplicaciones potenciales en la ciencia de los materiales.