Luminescence causes

All of the luciferases cause the emission of a bluish light when they catalyze the oxidation of coelenterazine. However, there are some marked differences between the decapod shrimp luciferases and the cnidarian luciferases (Matthews et al., 1977a,b). For example, the luminescence caused by the former (Amax about 452 nm) is bluer than that caused by the latter (7max 470-480 nm), and the optimum pH of the former, about 8.5, is significantly higher than that of the latter (Renilla, 7.4 Ptilosarcus, 7.0). The optimum temperature of the decapod shrimp luciferases (35°C) is higher than those of Ptilosarcus (23°C) and Renilla (32°C). 

Kieffer et al., in 1971, observed a temperature-independent luminescence caused by the recombination of electron and hole centres in irradiated vitreous organic matrices [6], The authors suggested that the recombination proceeds via electron tunneling. 

Excitation with various wavelengths revealed different Fe-related centres in semi-insulating samples [8,12], In addition to the 1.3 eV luminescence caused by Fe3+, we observe further NP lines at 1.268 eV and 1.286 eV (FIGURE 2). The long decay time of 2.6 ms for the 1.268 eV line indicates a spin-forbidden transition. It has tentatively been assigned to an Fe complex with a nearby donor [8,12]. 

Dy(III) salts are characterized by line luminescence caused by transitions of 4f-electrons. In crystallophosphors, line luminescence of ions is caused by transitions from the partially filled 4f-shell of the lanthanides from Ce(III) to Yb(III). The crystallophosphor luminescence spectra of Ce(III) are in the far infrared, those of Gd(III) in the ultraviolet and those of Ln(III) in the visual and near infrared regions. Complexes of Sm(III), Eu(III), Tb(III), Dy(III), and Tm(III) with organic ligands exhibit line sensitized luminescence (Fig. 4C). 

Finally, an obvious question arose as to the possibility that the reversible inhibition of luminescence caused by drugs or other chemical agents might be... 

The specific volumes and coefficients of refraction have been calculated for aqueous solutions of sucrose at several temperatures. Self-diffusion coefficients have been reported for sucrose, sodium D-glucuronate, and 2-amino-2-deoxy-D-glucose hydrochloride in aqueous solution. The triboluminescence (i.e. luminescence caused by mechanical stress) of crystalline mono- and di-saccharides has been studied this phenomenon was shown by some sugars (e.g. sucrose and D-glucose) but not by others (e.g. cellobiose and D-mannose). An e.s.r. spectroscopic study of D-glucose, D-mannose, D-galactose, D-fructose, and methyl... 

What is the distinction between chemiluminescence and luminescence caused when light is absorbed by a molecule or atom ... 

The main luminescence bands found in cBN crystals are summarized in Table 8 and Fig. 34. In most cases, the luminescence is excited by electron beams (cathodoluminescence, CL) (185-198). Luminescence caused by recombination of electrons and holes in pn junctions (injection luminescence, IL) has been observed (189,199). The origin of any of the luminescence bands is unknown at present, although there are discussions in the literature. 

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