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Related Concept Videos

The Contractile Ring02:15

The Contractile Ring

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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...
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In this lesson, we delve into the role of ring conformation and its stability, which determines the spatial arrangement and, consequently, the molecular symmetry and stereoisomerism of cyclic compounds. 1,2-Dimethylcyclohexane is used as a case study to evaluate the possible number of stereoisomers. Here, given the multiple (n = 2) chiral centers, there are 2n = 4 possible configurations that lack a plane of symmetry, as the ring skeleton exists in a non-planar chair conformation. In addition,...
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Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
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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...
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There are many research methods available to psychologists in their efforts to understand, describe, and explain behavior and the cognitive and biological processes that underlie it.
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Related Experiment Video

Updated: Mar 21, 2026

Directed Cellular Self-Assembly to Fabricate Cell-Derived Tissue Rings for Biomechanical Analysis and Tissue Engineering
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Directed Cellular Self-Assembly to Fabricate Cell-Derived Tissue Rings for Biomechanical Analysis and Tissue Engineering

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[When love becomes eternal: Two embedded rings, a case report].

A S Reguesse1, J D Szwebel1, T Schmitt1

  • 1Service de chirurgie plastique reconstructrice et esthétique, hôpital Saint-Joseph, 185, rue Raymond-Losserand, 75014 Paris, France.

Annales De Chirurgie Plastique Et Esthetique
|May 9, 2016
PubMed
Summary

This case study presents a rare instance of embedded ring injuries in a 69-year-old woman without prior psychiatric or neurological history. The non-invasive removal of the rings successfully resolved the condition without complications.

Keywords:
BaguesDigitalDigitaleEmbeddedEnchâsséesNerfNerveRaideurRingStiffness

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Area of Science:

  • Dermatology
  • Traumatology
  • Psychiatry

Background:

  • Embedded ring injury is a rare condition.
  • It is often associated with mental illness or cognitive disorders.
  • Clinical presentation can range from mild edema to severe neurovascular deficits.

Observation:

  • A 69-year-old woman presented with two embedded ring injuries.
  • The rings had been in place for over 20 years.
  • She had no past medical history of psychiatric or neurological disorder.

Findings:

  • A non-invasive approach was chosen for treatment.
  • The embedded rings were successfully removed by cutting them.
  • The patient's condition resolved without further morbidity.

Implications:

  • This case highlights that embedded ring injuries can occur in individuals without psychiatric or neurological history.
  • A non-invasive approach can be effective in managing such cases.
  • Early diagnosis and intervention are crucial to prevent complications.