三、FRET原理 受激发后的荧光团（供体）将受激发的静能转移到一个光吸收分子（受体）。 这种能的转移是非放射性的，其主要原因是供体和受体之间的偶极-偶极间的相互作用。 通过双偶极反应，一个 …

FRET is analogous to near-field communication, in that the radius of interaction is much smaller than the wavelength of light emitted. In the near-field region, the excited chromophore emits a virtual photon …

Fret comes from the Old English verb fretan, “to devour,” which shares an ancestor with another verb, etan, the ancestor of eat. In centuries past, animals—or monsters, in the case of Grendel —were …

Mar 28, 2024 · Fluorescence resonance energy transfer (FRET) is a powerful spectroscopic method for measuring distances in the 2–8 nm range.

The donor, FRET, and acceptor filter sets are designed to isolate and maximize three specific signals: donor fluorescence, acceptor fluorescence attributable to FRET, and the directly excited acceptor …

fret noun [C] (RAISED BAR) a thin, slightly raised metal bar, several of which are positioned across the neck (= long, narrow part) of some musical instruments, such as a guitar

FRET definition: to feel or express worry, annoyance, discontent, or the like. See examples of fret used in a sentence.

If you fret about something, you worry about it. I was working all hours and constantly fretting about everyone else's problems. [V + about/over] But congressional staffers fret that the project will …

1. to feel or express worry, annoyance, discontent, or the like. 2. to cause corrosion; gnaw into something: acids that fret at the strongest metals.

Jan 18, 2026 · Noun fret (plural frets) (music) One of the pieces of metal, plastic or wood across the neck of a guitar or other string instrument that marks where a finger should be positioned to depress …