Construct · 3 fields · 4 citations

Where does twist collide?

One name. Different field. Different construct. One map.

● jingle · one word, three constructs Nearest construct by meaning·not indexed
twist3 CONSTRUCTSPlot twistARISTOTLE · PERIPETEIATwist boundaryREAD–SHOCKLEY · BOUNDARYDNA twistLk = Tw + Wr

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1950Twist boundary1971DNA twist1996Plot twist
2026

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Narrative theory

A sudden reversal in a plot

In narrative theory, a twist is a sudden reversal in a story that overturns what the audience expected, re-casting earlier events in a new light. Aristotle's Poetics named the device peripeteia, the change of fortune to its opposite, and prized the reversal that arrives together with recognition as the engine of a well-made plot. The referent is a structural turn in a narrative, judged by how it is prepared and how it reshapes meaning, and it shares nothing with a crystal boundary or a coiled helix but the everyday word for turning.[1]

Unit
A reversal in the direction of a narrative
Recovery means
Not applicable
Measured by
Analysed qualitatively by its setup, surprise, and the way it re-reads prior events

Crystallography

a grain boundary where two crystals are related by rotation about an axis perpendicular to the boundary plane.

In crystallography, a twist boundary is a grain boundary at which the two crystals are related by a rotation about an axis perpendicular to the boundary plane, so the interface is a mesh of screw dislocations, in contrast to a tilt boundary rotated about an in-plane axis. Read and Shockley's 1950 Dislocation models of crystal grain boundaries derived how the boundary energy depends on this misorientation angle, the classic dislocation account of such interfaces. The referent is a specific misorientation geometry between crystal grains, measured by the twist angle and boundary energy, and it is unrelated to a story's reversal or a helix's winding beyond the shared idea of rotation.[2]

Unit
The rotation angle relating two grains about the boundary normal
Recovery means
Not applicable
Measured by
Specified by the misorientation (twist) angle and the dislocation spacing and energy of the boundary

Molecular biology

the number of times the two strands of the DNA double helix wind around each other.

In DNA topology, twist is the number of times the two strands of the double helix wind around each other, one of the two ways a closed circular molecule can take up its linking number in the relation linking number equals twist plus writhe. Fuller's 1971 The writhing number of a space curve supplied the geometric basis, and Crick's 1976 Linking numbers and nucleosomes applied the partition to how DNA wraps on its spools. The referent is a measurable winding of a molecule, counted in helical turns and traded against writhe when the DNA supercoils, and it is a different construct from a grain boundary's rotation or a plot's reversal.[3][4]

Unit
The number of helical turns of one DNA strand about the other
Recovery means
Not applicable
Measured by
Partitioned from the topological linking number as twist versus writhe, via gel electrophoresis and topoisomer analysis

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Nearby collisions

audience3 fields · 7 citationsjingle · one word, three constructsaxis1 fields · 1 citationsanchor · a standalone constructbasis3 fields · 5 citationsjingle · one word, three constructs

References

  1. Aristotle. (1996). Poetics (M. Heath, Trans.). Penguin Books. (Original work published ca. 335 BCE) ISBN 9780140446364
  2. Read, W. T., & Shockley, W. (1950). Dislocation models of crystal grain boundaries. Physical Review, 78(3), 275–289. https://doi.org/10.1103/PhysRev.78.275
  3. Fuller, F. B. (1971). The writhing number of a space curve. Proceedings of the National Academy of Sciences, 68(4), 815–819. https://doi.org/10.1073/pnas.68.4.815
  4. Crick, F. H. C. (1976). Linking numbers and nucleosomes. Proceedings of the National Academy of Sciences, 73(8), 2639–2643. https://doi.org/10.1073/pnas.73.8.2639

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