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Videos de Conceptos Relacionados

The Contractile Ring02:15

The Contractile Ring

Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
The Contractile Ring02:15

The Contractile Ring

Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
Chair Conformation of Cyclohexane02:02

Chair Conformation of Cyclohexane

The chair conformation is the most stable form of cyclohexane due to the absence of angle and torsional strain. The absence of angle strain is a result of cyclohexane’s bond angle being very close to the ideal tetrahedral bond angle of 109.5° in its chair conformer. Similarly, the torsional strain is also absent owing to the perfectly staggered arrangement of bonds.
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this staggered...
Toroids01:27

Toroids

A toroid is a closely wound donut-shaped coil constructed using a single conducting wire. In general, it is assumed that a toriod consists of multiple circular loops perpendicular to its axis.
When connected to a supply, the magnetic field generated in the toroid has field lines circular and concentric to its axis. Conventionally, the direction of this magnetic field is expressed using the right-hand rule. If the fingers of the right hand curl in the current direction, the thumb points in the...
Circular Orbits and Critical Velocity for Satellites01:16

Circular Orbits and Critical Velocity for Satellites

The Moon orbits around the Earth. In turn, the Earth (and other planets) orbit the Sun. The space directly above our atmosphere is filled with artificial satellites in orbit. One can examine the circular orbit, the simplest kind of orbit, to understand the relationship between the speed and the period of planets and satellites with respect to their positions and the bodies that they orbit.
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...

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Video Experimental Relacionado

Updated: Jun 3, 2026

The Assembly and Application of 'Shear Rings': A Novel Endothelial Model for Orbital, Unidirectional and Periodic Fluid Flow and Shear Stress
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The Assembly and Application of 'Shear Rings': A Novel Endothelial Model for Orbital, Unidirectional and Periodic Fluid Flow and Shear Stress

Published on: October 31, 2016

El curioso y corrugado anillo C de Saturno.

M M Hedman1, J A Burns, M W Evans

  • 1Department of Astronomy, Cornell University, Ithaca, NY 14853, USA. mmhedman@astro.cornell.edu

Science (New York, N.Y.)
|April 2, 2011
PubMed
Resumen

Saturno Saturno es Saturno.

Área de la Ciencia:

  • Ciencias planetarias Ciencias planetarias.
  • La astronomía es la astronomía.
  • Dinámica del anillo Dinámica del anillo

Sus antecedentes:

  • El anillo C de Saturno exhibe una sutil corrugada.
  • Anteriormente se había observado una estructura similar en el anillo D.

Objetivo del estudio:

  • Para investigar el origen y las características de la corrugada de anillo C.
  • Para determinar la naturaleza del evento que causó la inclinación del anillo.

Principales métodos:

  • Análisis de la iluminación de los anillos de Saturno en agosto de 2009.
  • Examen de las tendencias radiales en la longitud de onda de corrugado.

Principales resultados:

  • Se detectó una corrugada con una amplitud de 2-20 metros y una longitud de onda de 30-80 km a través del anillo C.

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The Assembly and Application of 'Shear Rings': A Novel Endothelial Model for Orbital, Unidirectional and Periodic Fluid Flow and Shear Stress
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Directed Cellular Self-Assembly to Fabricate Cell-Derived Tissue Rings for Biomechanical Analysis and Tissue Engineering

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  • Las características de la estructura sugieren la formación de una regresión nodal diferencial de un anillo inclinado.

    • Conclusiones:

    • La inclinación del anillo, que lleva a la corrugado, probablemente fue el resultado de un impacto por desechos interplanetarios dispersos.
    • La masa de la nube de escombros se estima entre 10^11 y 10^13 kilogramos.