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Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
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Degree of Curvature and Radius of Curvature01:19

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The degree of curvature and the radius of curvature are fundamental concepts in determining the sharpness or smoothness of a curve. The degree of curvature is a measure of how steeply a curve bends and can be determined using the chord basis or the arc basis. In the chord basis method, the degree of curvature is defined as the central angle subtended by a chord of 30.48 meters, helping in the calculation of the radius of the curve. The arc basis method defines the degree of...
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Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

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Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
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Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

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Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
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Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
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Vertebral Column: Regions and Curvature01:16

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The vertebral column or spine is a flexible column that supports the head, neck, and body and  allows for their movements. It also protects the spinal cord.
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Programación ultrarrápida de gran curvatura basada en la metátesis dinámica de selenio y azufre.

Ruiyang Wen1, Chenglin Zhang1, Chaozheng Miao1

  • 1International Research Center for Photoresponsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, China.

Advanced materials (Deerfield Beach, Fla.)
|February 9, 2026
PubMed
Resumen

Los investigadores desarrollaron un método rápido para programar la curvatura en hojas de polímero 2D utilizando desajustes de tensión. Esta técnica logra una flexión ultra rápida de 180° y mejora las propiedades mecánicas de los metamateriales de origami avanzados.

Palabras clave:
La curvatura es la curvatura de la curvatura.enlaces covalentes dinámicos de enlaces dinámicos.El origami es el origami.La programación estructural es la programación estructural.

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Área de la Ciencia:

  • Ciencia de los materiales Ciencia de los materiales.
  • Química de Polímeros La Química de Polímeros es la química de los polímeros.
  • Nanotecnología La nanotecnología es la nanotecnología.

Sus antecedentes:

  • La programación de curvatura en materiales de chapa 2D es crucial para la estructura y la función.
  • Los métodos actuales para la programación de curvatura ultra rápida y escalable se enfrentan a desafíos significativos.

Objetivo del estudio:

  • Desarrollar un método rápido, escalable y eficiente para la programación de alta curvatura en hojas de polímero 2D.
  • Para mejorar las propiedades mecánicas y permitir arquitecturas 3D complejas utilizando módulos de origami.

Principales métodos:

  • Generación de grandes desajustes de tensión mediante la combinación de polímeros relajantes de tensión ultrarrápidos (poliuretano que contiene diselenido) y ultrabajos (poliuretano que contiene disulfuro).
  • Utilizando componentes modulares y compresión para cargas direccionales de alta tensión localizadas.
  • Empleando la irradiación UV para desencadenar la flexión rápida de las láminas de polímero 2D.

Principales resultados:

  • Se logró una flexión de 180° en láminas de polímero 2D en 10 segundos de irradiación UV, un aumento de 15 veces en la tasa de programación de curvatura.
  • Escalabilidad demostrada y eficiencia en la generación de alta curvatura.
  • Produjo módulos de origami con una mejora de 37 veces en el rendimiento de compresión a través de la producción en masa.

Conclusiones:

  • La estrategia desarrollada ofrece una programación rápida y de alta curvatura con eficiencia, robustez mecánica y escalabilidad.
  • Este enfoque avanza en la aplicación práctica de los metamateriales basados en el origami.
  • El método permite el ensamblaje de complejas arquitecturas 3D a partir de módulos de origami producidos en masa.