2,5-diphenyloxazole

2,5-di·phen·yl·ox·a·zole (PPO),

(dī'fen-il-oks'ă-zōl),
A scintillator used in radioactivity measurements by liquid scintillation counting.

2,5-di·phen·yl·ox·a·zole

(PPO) (dī-fen'il-oks'ă-zōl)
A scintillator used in radioactivity measurements by scintillation counting.
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References in periodicals archive ?
Wei, "Two-component molecular materials of 2,5-diphenyloxazole exhibiting tunable ultraviolet/blue polarized emission, pump-enhanced luminescence, and mechanochromic response," Advanced Functional Materials, vol.
Specifically, Borexino is a scintillator detector [50] which employs as active detection medium a mixture of pseudocumene (PC, 1,2,4-trimethylbenzene) and PPO (2,5-diphenyloxazole, a fluorescent dye) at a concentration of 1.5 g/L.
leprae were suspended in 4.0 ml of acidified Middlebrook 7H12 BACTEC PZA media (Becton Dickinson) in a 5 ml glass vial with loosened cap which, in turn was inserted into a wide mouth liquid scintillation vial lined with filter paper impregnated with NaOH, 2,5-diphenyloxazole (Sigma) and Concentrate I (Kodak).
The scintillation cocktail was prepared by mixing 8 g PPO (2,5-diphenyloxazole) as a primary scintillant, 0.2 g POPOP [l,4-Di-{2-(4-methyl-5-phenyl-oxazolyl)}-benzene] as a secondary scintillant, 2000[cm.sup.3] toluene (solvent), and 1250[cm.sup.3] surfactant Triton-X 100 (Middleboe et al.
The PPO (2,5-diphenyloxazole) and MSB (1,4-Bis(2-methylstyryl) benzene) are used as a fluor and a wavelength shifter to downshift the ultraviolet light from the LS to the blue region of the spectrum where water has higher transparency.
Most dirty material used in the LS is PPO (C[.sub.15][H.sub.11]NO, 2,5-diphenyloxazole), which is a fluor used to produce light emission.
For a fluor, PPO ([C.sub.15][H.sub.n]NO, 2,5-diphenyloxazole, neutrino grade), Carbostyril 124 ([C.sub.10][H.sub.10][N.sub.2]O, 7-amino-4-methyl-2(1H)-quinolinol, CS-124), and Alexa fluor 350 (AF-350) were dissolved.

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