History of Fluorescence

Difference (from prior major revision) (minor diff)

Changed: 1c1

Fluorescence is the name given for the phenomenon whereby a molecule absorbs a high energy photon, and re-emits it as a lower energy (longer wavelength) photon; the energy difference between the absorbed and emitted photons ends up as molecular vibrations (heat). Usually the absorbed photon is in the ultra-violet, and the emitted light is in the viible range. Fluorescence is so named after the mineral Fluorspar? (Calcium Fluoride), which exhibits this phenomenon.

Fluorescence is the name given for the phenomenon whereby a molecule absorbs a high energy photon, and re-emits it as a lower energy (longer wavelength) photon; the energy difference between the absorbed and emitted photons ends up as molecular vibrations (heat). Usually the absorbed photon is in the ultra-violet, and the emitted light is in the visible range. Fluorescence is so named after the mineral Fluorspar? (Calcium Fluoride), which exhibits this phenomenon.

Changed: 6c6

The common fluorescent tube relies on fluorescence. Inside the glass tube is a partial vacuum and a small amount of mercury. An electric discharge in the tube caused the mercury atoms to emit light. This is in the ultraviolet range and is invisible, and also harmful to living organisms, do the tube is lined with a coating of a fluorescent material, called the phosphor, which absorbs the UV and re-emits visible light.

The common fluorescent tube relies on fluorescence. Inside the glass tube is a partial vacuum and a small amount of mercury. An electric discharge in the tube causes the mercury atoms to emit light. The emitted light is in the ultraviolet range and is invisible, and also harmful to living organisms, so the tube is lined with a coating of a fluorescent material, called the phosphor, which absorbs the UV and re-emits visible light.

Added: 12a13

* The DNA chip

Changed: 14c15,16

* something about that fluorescent compound that binds to Ca++ so that changes in calcium in the cell can be viewed in real time with a fluorescent microscope???

* something about that fluorescent compound that binds to Ca++ so that changes in intracellular calcium can be viewed in real time with a fluorescent microscope???
* FACS (Fluorescent activated cell sorting)

	Revision 5 . . (edit) November 30, 2001 6:16 pm by Malcolm Farmer [link to DNA chip]
	Revision 4 . . (edit) November 26, 2001 11:37 pm by Malcolm Farmer
	Revision 3 . . November 26, 2001 9:11 pm by Malcolm Farmer [initial entry, needs expanding]
	Revision 2 . . November 26, 2001 9:09 pm by Malcolm Farmer [semi-stub, needs expanding]
	Revision 1 . . November 26, 2001 9:08 pm by Malcolm Farmer [initial entry, needs expanding]