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Related Concept Videos

Formation of Intermediate Filaments00:57

Formation of Intermediate Filaments

Intermediate filaments are cytoskeletal proteins with higher tensile strength and flexibility than microfilaments and microtubules. Unlike the other two cytoskeletal proteins, intermediate filament formation lacks the enzymatic activity to hydrolyze nucleotides like ATP and GTP to generate energy for polymerization. Therefore, the formation of intermediate filaments is multistep self-assembly. The involvement of any accessory proteins in intermediate filament formation has not yet been reported.
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Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also regularly...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

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Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
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The Structure of Intermediate Filaments01:19

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The intermediate filaments are one of three widely studied cytoskeletal filaments. They are so named as their diameter (10 nm) is in between that of microfilaments (7 nm) and the microtubules (25 nm).  These filaments are highly stable and can remain intact when exposed to high salt concentrations and detergents. These filaments are responsible for providing stability and mechanical support to the cells. They also help in cell adhesion and maintaining tissue integrity.
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A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move perpendicular to it. If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of motion, a charged particle follows a curved path. The particle continues to follow this curved path until it forms a complete circle. Another way to look at this is that the...

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Related Experiment Video

Updated: May 10, 2026

Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas
07:54

Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas

Published on: April 3, 2018

Helical structures in vertically aligned dust particle chains in a complex plasma.

Truell W Hyde1, Jie Kong, Lorin S Matthews

  • 1Center for Astrophysics, Space Physics, and Engineering Research (CASPER), Baylor University, Waco, Texas 76798-7310, USA. truell_hyde@baylor.edu

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|June 18, 2013
PubMed
Summary
This summary is machine-generated.

Charged dust particles self-assemble into complex 1D, 2D, and 3D structures, including helical chains and spindles. These self-organized patterns depend on confinement, particle number, and radiofrequency power.

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Area of Science:

  • Plasma physics
  • Condensed matter physics
  • Complex systems

Background:

  • Dusty plasmas exhibit complex phenomena due to inter-particle interactions.
  • Understanding self-assembly in confined systems is crucial for materials science.

Purpose of the Study:

  • To experimentally investigate the self-assembly of charged dust particles into ordered structures.
  • To analyze the transition pathways and symmetries of self-organized dust structures.

Main Methods:

  • Experimentally produced and examined structures from vertically aligned, charged dust particle bundles.
  • Utilized a Gaseous Electronics Conference radiofrequency reference cell.
  • Analyzed system evolution from 1D chains to 3D helical structures.

Main Results:

  • Observed self-organized formation of 1D chains, 2D zigzag, and 3D helical structures with various symmetries.
  • Demonstrated system evolution through distinct structural phases.
  • Identified dependence of stable configurations on confinement, particle count, and radiofrequency power.

Conclusions:

  • Structural phase transitions are repeatable and independent of hysteresis.
  • Experimental findings align with theoretical minimum energy configurations predicted by molecular dynamics simulations.