11. To allow treatment of deeper tumours some researchers are using internal chemiluminescence to activate the photosensitiser. 12. However, in the presence of a fluorescer, light can be generated ( chemiluminescence ). 13. In some cases these enzymes are exposed to reagents which cause them to produce light or Chemiluminescence . 14. Hence the application of fluorescent proteins such as Green fluorescent protein is not a biological application of chemiluminescence . 15. The reverse process to photoinduced electron transfer is displayed by light emitting diodes ( LED ) and chemiluminescence . 16. He studied chemiluminescence during the late 1940s-early 1950s, which led him to discover the electroluminescence. 17. So it is the pyrophoricity of the phosphine that makes it glow; not the chemiluminescence of the phosphorus. 18. The efficiency was only about 0.1 %, but it was the foundation from which sprang modern chemiluminescence . 19. Phosphorus, the chemical element named for its light-emitting behavior, emits light due to chemiluminescence , not phosphorescence. 20. The detection of horseradish peroxidase by enzymatic chemiluminescence ( ECL ) is a common method of detecting antibodies in western blotting.