Some reasons include: as a symbol of Sturm und Drang; modulation; and for characterisation.

Other areas of study include modulation, enharmonic notes, ornaments, diatonic chords, and jazz chord symbols.

This includes 5-HT3 and Substance P antagonism, modulation of gastrointestinal motility, and antioxidant properties.

The science of photonics includes the generation, emission, transmission, modulation, signal processing, switching, amplification, and detection/sensing of light.

Effects include vasodilatation, neurotransmission (see gasotransmitters), modulation of the hair cycle, production of reactive nitrogen intermediates and penile erections (through its ability to vasodilate).

Schenker's theory is monotonal: the Ursatz, as the unfolding of the tonic triad, by definition cannot include modulation.

There is a brief developmental section (bar 69) that includes modulation on the primary theme as well as inversions of the oboe lament.

Redox signaling also includes active modulation of electronic flows in semiconductive biological macromolecules.

The science of photonics includes the emission, transmission, amplification, detection, modulation, and switching of lightwaves over a broad range of frequencies and wavelengths.

These spatial properties include local modulation of stiffness and the generation of contractile force.