They give very steady illumination on fluorescent screens.
Stokes to occur in fluorescent bodies.
We may notice that ethyl oxalosuccinonitrile is the first case of a fluorescent aliphatic compound.
The pigment itself may be soluble in water, as is the case with the blue-green fluorescent body formed by B.
Fluorescens and a whole group of fluorescent bacteria.
It crystallizes in needles or prisms, and dissolves in alcohol to form a bright blue fluorescent liquid, which on the addition of ferric chloride becomes and A4 Tetraiiydro< cherry red.
This helix is presented or held near to the antenna, and the length of it shortened until oscillations of the greatest intensity are produced in the helix as indicated by the use of an indicator of fluorescent paper.
Certain crystals from Cumberland are beautifully fluorescent, appearing purple with a bluish internal haziness by reflected light, and greenish by transmitted light.
Clear amber is found beside the Buzeu and its affluents, with brown and grey clouded amber, and a blue fluorescent variety, of considerable value.
Wiedemann and Schmidt' that the vapours of sodium and potassium are fluorescent, important as it was from an experimental point of view, caused no surprise.
This solution is of a deep violetred colour, and is somewhat fluorescent; it decomposes on exposure to light, or when heated.
A tetrabromresorufin is used as a dye-stuff under the name of Fluorescent Resorcin Blue.
A fluorescent amber is said, however, to occur in some abundance in Southern Mexico.
The fluorescent bands in this case appear to shift rapidly when the period of the incident vibration is altered, though the change may be small.
The same happenchance brought us the learning that children in schools with fluorescent lights get fewer cavities than those in schools with incandescent lighting.
Fluorescent lighting increases the body's production of saliva, which helps prevent cavities.
Fluorescent lighting overhead morphed to an expansive blue sky and brilliant sunlight that made him squint.
A cathode discharge is projected through two small holes in plates in the narrow part of the tube on a fluorescent screen at the end of the enlarged end, and the cathode ray or pencil depicts on it a small bright greenish patch of light.
Such bodies are said to be fluorescent, the degradation of motion towards that determined by its temperature gives rise to the law of Stokes, the fluorescent light being in nearly all cases of lower frequency than the incident light.
The bark of the horse-chestnut contains a greenish oil, resin, a yellow body, a tannin, C26 H 24012, existing likewise in the seeds and various parts of the tree, and decomposable into phloroglucin and aesciglyoxalic acid, C 7 H 6 O 3, also aesculetin hydrate, and the crystalline fluorescent compound aesculin, of the formulaC21H24013 (Rochleder and Schwarz), with which occurs a similar substance fraxin, the paviin of Sir G.
The acid solution of sulphate of quinine is fluorescent, especially when dilute; and it is laevo-rotatory.
The oxide is a black or brown powder according as it is prepared from the exalate or sulphate, and when pure it is non-fluorescent, but mixed with gadolinia or alumina it possesses this property.
This theory explains the fluorescence of anthranilic acid (o-aminobenzoic acid), by regarding the aniline residue as the luminophore, and the carboxyl group as the fluorogen, since, apparently, the introduction of the latter into the non-fluorescent aniline molecule involves the production of a fluorescent substance.
The residues from petroleum distillation have been shown to contain very dense solids and liquids of high specific gravity, having a large proportion of carbon and possessed of remarkable fluorescent properties.
Showed that the vibrating system of the fluorescent light seems identical with that observed by absorption in the fluted band spectrum, Wood excited the fluorescence by homogeneous radiation and discovered some remarkable facts.