Adaptive Coloration, Phosphorescence, &c

Observations upon Tropical Fishes and Inferences from their Adaptive Coloration.

tribution and more or less evanescent in continuity, to the streams that flowed constantly in one direction and eventually into an unnatural habitat, the sea. They needed a more direct and quicker embryonic development, requiring, it would seem, the abandonment of the nauplius stage. It may therefore well be that the trilobites retaining the nauplius stage did not give rise to these stocks, as ...

Metal-enhanced phosphorescence (MEP)

We report the first observation of metal-enhanced phosphorescence (MEP) at low temperature. Silver island films (SiFs) in close proximity to Rose Bengal, significantly enhance the phosphorescence emission intensity. The enhanced phosphorescence intensity is 5-fold brighter from SiFs as compared to a glass control sample at 77 K. In addition, enhanced fluorescence emission and spectral narrowing...

Chiral discrimination by phosphorescence

Phosphorescence in Bacillus Spores

The rapid classification and identification of bacteria and bacterial spores by non-invasive means remains largely unsolved. U.V. fluorescence is becoming an accepted method for detecting the presence of biological aerosols. In other studies, auto fluorescence of bacteria has been shown to be useful in identifying bacteria in a medical application. Our present work attempts to build on this app...

Phosphorescence of pyridoxal.

The effect of pH on the relative distribution of pyridoxal structures in aqueous solution was examined by fluorescence spectroscopy. The hemiacetal structure, which is the predominant species at neutral pH, exhibits a symmetrical emission band at 378 rnp and is characterized by a quantum yield of 0.08. Luminescence studies at low temperature (77” K) have permitted the analysis of the phosphores...