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Many types of calcite and amber will fluoresce under shortwave UV, longwave UV and visible light. Rubies, emeralds, and diamonds exhibit red fluorescence under long-wave UV, blue and sometimes green light; diamonds also emit light under X-ray radiation. Fluorescence in minerals is caused by a wide range of activators. In some cases, the ...
Same region showing Chlorophyll A autofluorescence with 440 nm laser excitation and far red emission (below). Microscopic images of a moss leaf from Plagiomnium undulatum. Bright-field microscopy at the top and fluorescence microscopy at the bottom. The red fluorescence is from the chlorophyll in the chloroplasts.
Also it can be used in microscopy as a tag known by Green Fluorescent Protein (GFP) to track development and movement of structures within the cell when shined under UV emitting lightbulbs. [6] Ultraviolet light has positive effects such as vitamin-D production in skin tissue and negative effects of sunburn damage and inflammation in the same ...
Fluorescence of different substances under UV light. Green is a fluorescein, red is Rhodamine B, yellow is Rhodamine 6G, blue is quinine, purple is a mixture of quinine and rhodamine 6g. Solutions are about 0.001% concentration in water. Fluorophore molecules could be either utilized alone, or serve as a fluorescent motif of a functional system.
Benitoite fluoresces under short wave ultraviolet light, appearing bright blue to bluish white in color. The more rarely seen clear to white benitoite crystals fluoresce red under long-wave UV light. It was discovered in 1907 by prospector James M. Couch in the San Benito Mountains roughly halfway between San Francisco and Los Angeles.
One fluorescent variety of fluorite is chlorophane, which is reddish or purple in color and fluoresces brightly in emerald green when heated (thermoluminescence), or when illuminated with ultraviolet light. The color of visible light emitted when a sample of fluorite is fluorescing depends on where the original specimen was collected; different ...
Other explanations are physiological, with bright color being a side-product of a defense from UV (e.g. the protein sandercyanin, [17] and UV protection of genes in pollen [9]). Bright red fluorescence in the larvae of Acropora millepora coral correlates with the activation of a diapause -like state that may aid in conserving energy and ...
Furthermore, fluorescent molecules have a tendency to generate reactive chemical species when under illumination which enhances the phototoxic effect. [citation needed] Unlike transmitted and reflected light microscopy techniques, fluorescence microscopy only allows observation of the specific structures which have been labeled for fluorescence.
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