action of glutamate on the spectral absorbance of retina's fish

ABSTRACT

Perfusion of the isolated retina of the bulti [tilapia nilotica] A with Ringer's solution containing 5 mM glutamate is shown to cause changes in the optical density of the retina. The absorbance spectrum of these changes were recorded every 15 minutes up to 90 minutes after start of perfusion. The results indicate that there were polyphases changes over the spectrum of wavelength ranging from 350 to 650 nm. The maximum increase in optical density was found to be 25 percent at about 420 nm, while the maximum drop was 60 percent at 440-450 nm