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

Catalysis02:50

Catalysis

27.6K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
27.6K
Electron Transport Chains01:28

Electron Transport Chains

102.7K
The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
102.7K
Phase I Oxidative Reactions: Overview01:19

Phase I Oxidative Reactions: Overview

379
Phase I biotransformation, or functionalization, is a crucial chemical process that converts drugs and other xenobiotics into more water-soluble forms, facilitating expulsion from the body. It involves oxidative, reductive, and hydrolytic reactions that add or unveil polar functional groups on lipophilic substrates. Key players in phase I reactions are the mixed-function oxidases. Situated in liver cell microsomes, these enzymes predominantly carry out drug metabolism. They require molecular...
379
Oxygenic Photosynthesis01:26

Oxygenic Photosynthesis

187
Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate...
187
Oxidative Cleavage of Alkenes: Ozonolysis01:46

Oxidative Cleavage of Alkenes: Ozonolysis

11.2K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
11.2K
Chemiosmosis and ATP Synthesis01:22

Chemiosmosis and ATP Synthesis

254
The electron transport chain is a critical component of cellular respiration, occurring in the inner mitochondrial membrane. It facilitates the transfer of high-energy electrons from reduced cofactors NADH and FADH₂ to molecular oxygen, the final electron acceptor. This transfer of electrons through a series of protein complexes is tightly coupled to the translocation of protons across the membrane, generating a proton gradient essential for ATP synthesis.Electron Flow and Proton...
254

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Radiological and clinical outcomes of transcatheter thrombolysis via superior mesenteric artery vs percutaneous mechanical thrombectomy in patients with anticoagulation-refractory acute mesenteric venous thrombosis.

Annals of vascular surgery·2026
Same author

Fluctuating Immune Reconstitution and Delayed HIV-1 DNA Decline in People Living with HIV with Low CD4 on Bictegravir-Based Therapy.

AIDS research and human retroviruses·2026
Same author

R4ST: a reference-guided graph-generative model for robust reconstruction of spatial transcriptomic profiles.

Bioinformatics (Oxford, England)·2026
Same author

Dynamic Risk Profiling of Polylactic Acid-Based Food Packaging: From Migration-Derived Toxicity Biomarkers to Green Technology-Driven Safety Optimization.

Comprehensive reviews in food science and food safety·2026
Same author

Upcycling grapefruit peel pectin, curcumin, and Zn-CD into a high-performance biodegradable film for meat preservation and colorimetric freshness tracking.

Food research international (Ottawa, Ont.)·2026
Same author

Growth-Coupled Assembly of Hydrogen-Bonded Organic Framework Membranes on Cell Surfaces.

Journal of the American Chemical Society·2026

Video Experimental Relacionado

Updated: Sep 13, 2025

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
10:21

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Published on: October 5, 2019

8.5K

Transferencia de protones acelerada por soporte para catálisis de evolución de oxígeno mejorada

Wenrui Li1, Jianning Lv1, Xianchun Chen1

  • 1Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science, Ministry of Education, Frontiers Science Center for High Energy Material, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.

Journal of the American Chemical Society
|August 2, 2025
PubMed
Resumen

Los soportes de catalizadores pueden acelerar activamente las reacciones. Los soportes funcionalizados con grupos hidroxilo mejoran la transferencia de protones en las reacciones de evolución del oxígeno (OER), aumentando significativamente la eficiencia catalítica.

Más Videos Relacionados

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

7.9K
Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells
06:39

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells

Published on: October 20, 2023

3.2K

Videos de Experimentos Relacionados

Last Updated: Sep 13, 2025

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
10:21

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Published on: October 5, 2019

8.5K
Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

7.9K
Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells
06:39

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells

Published on: October 20, 2023

3.2K

Área de la Ciencia:

  • Electroquímica y ciencias de los materiales

Sus antecedentes:

  • Los soportes de catalizadores se consideran tradicionalmente como materiales inertes para dispersar las especies activas.
  • Los catalizadores de ingeniería para participar activamente en las reacciones, en particular la transferencia de protones, siguen siendo un área poco explorada.

Objetivo del estudio:

  • Demostrar que los soportes de catalizadores pueden ser diseñados para participar activamente en las reacciones catalíticas.
  • Investigar el papel de los soportes funcionales en la aceleración de la transferencia interfacial de protones durante la reacción de evolución del oxígeno (OER).

Principales métodos:

  • Síntesis de racimos de óxido de iridio (IrO2) en soportes de fosfato de zirconio funcionalizados con hidroxilo y metilo (IrO2/OH-ZrP e IrO2/CH3-ZrP).
  • Espectroscopia in situ, mediciones electroquímicas y cálculos teóricos para elucidar los mecanismos de reacción.
  • Estudios de actividad OER dependientes de la rotación y mediciones de pH locales para proporcionar evidencia de la transferencia de protones mediada por el soporte.

Principales resultados:

  • Los grupos hidroxilo en el soporte IrO2 / OH-ZrP participan directamente en el OER al bajar la barrera de desprotonación OOH, facilitando la transferencia de protones.
  • Esto conduce a un mecanismo de transferencia de protones acelerado por soporte (SAEM, por sus siglas en inglés), distinto del mecanismo convencional de evolución de adsorbados (AEM, por sus siglas en inglés) observado para IrO2/CH3-ZrP.
  • IrO2/OH-ZrP muestra una frecuencia de rotación 2,99 veces mayor que IrO2/CH3-ZrP a 300 mV de sobrepotencial.

Conclusiones:

  • Los soportes de catalizador se pueden diseñar activamente para mejorar el rendimiento catalítico facilitando la transferencia de protones.
  • La ingeniería de soporte es crucial para las reacciones limitadas de transferencia de protones, ofreciendo un nuevo paradigma más allá de la optimización activa del sitio.
  • El mecanismo SAEM pone de relieve el potencial de los soportes funcionalizados para avanzar en el diseño de electrocatalisadores para OER y otras reacciones.