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

Design Example: Forces in Sluice Gate01:11

Design Example: Forces in Sluice Gate

In hydraulic engineering, sluice gates are essential for managing water flow through channels, reservoirs, and irrigation systems. Sluice gates, acting as vertical barriers, regulate water by adjusting the gate's opening height, which changes the velocity and pressure of water flowing beneath the gate. Understanding the forces involved is crucial to designing sluice gates that can withstand dynamic pressure differences, especially when the gate is closed or partially open.
Key variables in...
Properties of the z-Transform I01:17

Properties of the z-Transform I

The z-transform is a fundamental tool in digital signal processing, enabling the analysis of discrete-time systems through its various properties. It is an invaluable tool for analyzing discrete-time systems, offering a range of properties that simplify complex signal manipulations. One fundamental property is linearity. For any two discrete-time signals, the z-transform of their linear combination equals the same linear combination of their individual z-transforms. This property is essential...
Biasing of FET01:22

Biasing of FET

Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the gate...
Underflow Gates01:30

Underflow Gates

Underflow gates are vital for controlling water flow in irrigation canals. The three main types of underflow gates — vertical, radial, and drum gates — serve different purposes while ensuring effective flow management. Vertical gates move up and down, generating a free-flowing water jet; radial gates pivot to regulate the flow; and drum gates rotate for precise adjustments. The flow through these gates is influenced by downstream conditions, resulting in free or drowned outflow.Free and Drowned...
Characteristics of JFET01:21

Characteristics of JFET

Junction Field Effect Transistors (JFETs) exhibit specific operational characteristics based on the relationship between the drain current (id) and the drain-source voltage (Vds), along with varying gate-source voltages (Vgs).
The core of a JFET's operation is controlling drain current by modulating the gate-source voltage. When the drain and gate voltage are set to zero, the JFET exhibits no net current flow, representing a state of equilibrium. The drain current increases linearly as the...
Ligand-Gated Ion Channel Receptor: Gating Mechanism01:30

Ligand-Gated Ion Channel Receptor: Gating Mechanism

Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Shock measurements of alternative tamper materials YAG and GGG.

Optics letters·2025
Same author

Adult life-course trajectories of psychological distress and economic outcomes in midlife during the COVID-19 pandemic: evidence from the 1958 and 1970 British birth cohorts.

Social psychiatry and psychiatric epidemiology·2023
Same author

Can Real-world Data and Rapid Learning Drive Improvements in Lung Cancer Survival? The RAPID-RT Study.

Clinical oncology (Royal College of Radiologists (Great Britain))·2022
Same author

Safe provision of elective endocrine surgery operations amid the COVID-19 crisis.

Annals of the Royal College of Surgeons of England·2021
Same author

Evaluation of a lateral-flow nanoparticle fluorescence assay for TB infection diagnosis.

The international journal of tuberculosis and lung disease : the official journal of the International Union against Tuberculosis and Lung Disease·2021
Same author

Machine learning to predict early recurrence after oesophageal cancer surgery.

The British journal of surgery·2020

Video Experimental Relacionado

Updated: Jun 2, 2026

The Zebrafish Tol2 System: A Modular and Flexible Gateway-Based Transgenesis Approach
10:00

The Zebrafish Tol2 System: A Modular and Flexible Gateway-Based Transgenesis Approach

Published on: November 30, 2022

Abrir la puerta: la flexibilidad del marco en ZIF-8 explorada por experimentos y simulaciones.

D Fairen-Jimenez1, S A Moggach, M T Wharmby

  • 1Institute for Materials and Processes, School of Engineering, The University of Edinburgh, United Kingdom. David.Fairen@ed.ac.uk

Journal of the American Chemical Society
|May 11, 2011
PubMed
Resumen

El marco-8 de imidazol zeolítico (ZIF-8) exhibe flexibilidad estructural, permitiendo que las moléculas grandes se adsorban. Esta flexibilidad, impulsada por los columpios de la izquierda, permite el ajuste de membranas avanzadas de separación de gases.

Más Videos Relacionados

Electric Cell-Substrate Sensing for Real-Time Evaluation of Metal-Organic Framework Toxicological Profiles
04:53

Electric Cell-Substrate Sensing for Real-Time Evaluation of Metal-Organic Framework Toxicological Profiles

Published on: May 26, 2023

Confocal Microscope-Based Laser Ablation and Regeneration Assay in Zebrafish Interneuromast Cells
11:17

Confocal Microscope-Based Laser Ablation and Regeneration Assay in Zebrafish Interneuromast Cells

Published on: May 20, 2020

Videos de Experimentos Relacionados

Last Updated: Jun 2, 2026

The Zebrafish Tol2 System: A Modular and Flexible Gateway-Based Transgenesis Approach
10:00

The Zebrafish Tol2 System: A Modular and Flexible Gateway-Based Transgenesis Approach

Published on: November 30, 2022

Electric Cell-Substrate Sensing for Real-Time Evaluation of Metal-Organic Framework Toxicological Profiles
04:53

Electric Cell-Substrate Sensing for Real-Time Evaluation of Metal-Organic Framework Toxicological Profiles

Published on: May 26, 2023

Confocal Microscope-Based Laser Ablation and Regeneration Assay in Zebrafish Interneuromast Cells
11:17

Confocal Microscope-Based Laser Ablation and Regeneration Assay in Zebrafish Interneuromast Cells

Published on: May 20, 2020

Área de la Ciencia:

  • Ciencia de los materiales Ciencia de los materiales.
  • Ingeniería Química Ingeniería Química.
  • Nanotecnología La nanotecnología es la nanotecnología.

Sus antecedentes:

  • El marco-8 de imidazol zeolítico (ZIF-8) posee una estructura única con grandes cavidades conectadas por ventanas estrechas, lo que teóricamente permite el tamizado molecular de gases como H2 y CH4.
  • La adsorción observada de moléculas más grandes en ZIF-8 indica una flexibilidad estructural inherente, lo que desafía las suposiciones iniciales sobre la accesibilidad de sus poros.

Objetivo del estudio:

  • Investigar la flexibilidad estructural de ZIF-8 utilizando una combinación de técnicas experimentales y simulaciones moleculares.
  • Comprender el mecanismo detrás de los cambios estructurales en ZIF-8 tras la adsorción de gas.

Principales métodos:

  • Técnicas experimentales (por ejemplo, isotermas de adsorción de gas, difracción de rayos X in situ).
  • Simulaciones moleculares (por ejemplo, Gran Canónico de Montecarlo, dinámica molecular).
  • Análisis del efecto de oscilación en los enlaces de imidazolato.

Principales resultados:

  • La estructura de ZIF-8 se modifica por la absorción de adsorción de gas, reflejando los cambios observados a presiones extremadamente altas (14.700 bar).
  • Se identifica un "efecto de oscilación" en los enlaces de imidazolato como el mecanismo responsable de los cambios estructurales y la accesibilidad de los poros.
  • El estudio demuestra que ajustar la flexibilidad de ZIF-8 afecta su rendimiento en aplicaciones de tamiz molecular.

Conclusiones:

  • ZIF-8 exhibe una flexibilidad estructural significativa, lo que permite la adsorción de moléculas más grandes que sus estrechas aberturas de ventana.
  • La flexibilidad se atribuye a un movimiento oscilante de los enlaces de imidazolato, que puede desencadenarse por la absorción de gas o la alta presión.
  • Controlar esta flexibilidad es crucial para diseñar membranas avanzadas basadas en ZIF-8 para una separación eficiente de gases.