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Related Concept Videos

Symmetry01:26

Symmetry

286
The equation of an ellipse centered at the origin defines all points whose distances from the center maintain a constant ratio between the horizontal and vertical axes. This equation results in a smooth, closed curve that extends further along the x-axis than the y-axis, giving it a horizontal orientation. Such an ellipse demonstrates three kinds of symmetry: across the x-axis, across the y-axis, and about the origin. These symmetries are essential in understanding the graph's structure and...
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Properties of Fourier series II01:21

Properties of Fourier series II

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Time scaling of signals is a crucial concept in signal processing that affects the Fourier series representation without altering its coefficients. The process modifies the fundamental frequency, thereby changing how the series represents the signal over time. This principle is essential in various applications, including audio and image processing, where signal manipulation is frequent. Understanding function symmetries is fundamental to simplifying the Fourier series.
A function f(t) is...
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Symmetry in Maxwell's Equations01:28

Symmetry in Maxwell's Equations

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Once the fields have been calculated using Maxwell's four equations, the Lorentz force equation gives the force that the fields exert on a charged particle moving with a certain velocity. The Lorentz force equation combines the force of the electric field and of the magnetic field on the moving charge. Maxwell's equations and the Lorentz force law together encompass all the laws of electricity and magnetism. The symmetry that Maxwell introduced into his mathematical framework may not be...
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Gauss's Law: Planar Symmetry01:27

Gauss's Law: Planar Symmetry

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A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
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Chirality02:25

Chirality

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Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
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Gauss's Law: Cylindrical Symmetry01:20

Gauss's Law: Cylindrical Symmetry

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A charge distribution has cylindrical symmetry if the charge density depends only upon the distance from the axis of the cylinder and does not vary along the axis or with the direction about the axis. In other words, if a system varies if it is rotated around the axis or shifted along the axis, it does not have cylindrical symmetry. In real systems, we do not have infinite cylinders; however, if the cylindrical object is considerably longer than the radius from it that we are interested in,...
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Related Experiment Video

Updated: Mar 23, 2026

Symmetric Bihemispheric Postmortem Brain Cutting to Study Healthy and Pathological Brain Conditions in Humans
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Symmetry matters.

Laila Moubayidin1, Lars Østergaard1

  • 1Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK.

The New Phytologist
|June 19, 2015
PubMed
Summary
This summary is machine-generated.

Organ development relies on precise symmetry establishment, crucial for multicellular organisms. This study explores genetic and hormonal signals driving an organ

Keywords:
Arabidopsis gynoeciumbilateral symmetryplant developmentradial symmetrysymmetry breakingsymmetry transition

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Area of Science:

  • Developmental biology
  • Cell signaling
  • Organogenesis

Background:

  • Multicellular organism development requires precise symmetry at organismal and tissue levels.
  • Cell communication over distances, likely via mobile morphogenic signals, is essential for establishing symmetry planes.

Purpose of the Study:

  • To elucidate the molecular mechanisms underlying symmetry establishment in developing organisms.
  • To describe the genetic and hormonal interactions governing an unusual symmetry transition in an organ.

Main Methods:

  • Analysis of genetic interactions.
  • Investigation of hormonal signaling pathways.
  • Observation of symmetry transitions in organ development.

Main Results:

  • Identification of key genetic and hormonal factors involved in symmetry.
  • Detailed description of a bilateral-to-radial symmetry transition in an organ.
  • Demonstration of how this transition promotes reproduction.

Conclusions:

  • Molecular data are now emerging to explain long-standing questions about symmetry in nature.
  • Specific genetic and hormonal interactions can dynamically alter organ symmetry.
  • Symmetry transitions play a role in reproductive strategies.