The emission
spectra were collected in the range of 305–400 nm, 340–540 nm and
410–700 nm after fixing the excitation wavelength at 290, 322
and 382 nm, respectively. No sample preparation was used in this
study for the collection of spectra. The spectra of muscle samples
(2 cm × 1 cm × 0.5 cm), mounted between two quartz slides were recorded
directly on the surface of the meat sample. The measurements
were repeated twice on different test specimens for each muscle sample