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Qu'est-ce (qui) est J-coupling - définition
J-coupling
![−CH<sub>2</sub>−]] hydrogens are coupling with each other, resulting in a triplet and quartet respectively.](https://commons.wikimedia.org/wiki/Special:FilePath/1H NMR Ethanol Coupling shown.svg?width=200 "−CH<sub>2</sub>−]] hydrogens are coupling with each other, resulting in a triplet and quartet respectively.")
In nuclear chemistry and nuclear physics, J-couplings (also called spin-spin coupling or indirect dipole–dipole coupling) are mediated through chemical bonds connecting two spins. It is an indirect interaction between two nuclear spins that arises from hyperfine interactions between the nuclei and local electrons.
Coupling
![An elastic coupling (for connecting a [[windsurfing]] sail rig to the board)](https://commons.wikimedia.org/wiki/Special:FilePath/Windsurfing equipment 2008 46.jpg?width=200 "An elastic coupling (for connecting a [[windsurfing]] sail rig to the board)")
 - Angular Misalignment.jpg?width=200 "Increasing number of coils allows for greater angular misalignment")
MECHANICAL CONNECTION BETWEEN TWO OBJECTS
Gear coupling; Oldham coupler; Oldham coupling; Oldham joint; Elastic coupling; Double-slider coupling; Slider coupling; Muff coupling; Beam coupling; Couplings; Shaft coupling; Tapered shaft lock; Power Lock; Keyless shaft locking device; Flexible coupling; Diaphragm coupling
·p.pr. & ·vb.n. of Couple.
II. Coupling ·noun The act of bringing or coming together; connection; sexual union.
III. Coupling ·noun A device or contrivance which serves to couple or connect adjacent parts or objects; as, a belt coupling, which connects the ends of a belt; a car coupling, which connects the cars in a train; a shaft coupling, which connects the ends of shafts.
Coupling
MECHANICAL CONNECTION BETWEEN TWO OBJECTS
Gear coupling; Oldham coupler; Oldham coupling; Oldham joint; Elastic coupling; Double-slider coupling; Slider coupling; Muff coupling; Beam coupling; Couplings; Shaft coupling; Tapered shaft lock; Power Lock; Keyless shaft locking device; Flexible coupling; Diaphragm coupling
The joining of cells of a galvanic battery, of dynamos or of other
devices, so as to produce different effects as desired.
157 STANDARD ELECTRICAL DICTIONARY
