I havent got a clue about chemicals etc but thought I would share this to see what you think. I live in France amongst vineyards and keep free range chickens who frequently go into the vineyards. Tonight I shut them up in the dark and cracked an egg which I then threw on the floor (mainly because I was cross with myself as I only get one a day!) but then a weird thing happened. It glowed in the dark in patches on the floor. It was pitch black so I couldnt see without a torch but I could clearly see where the broken egg splattered with a green luminous glow. By the time I had walked a few yards to the compost and back it had dimmed considerably and then disappeared.
Any ideas what could have caused this? I did a quick search and came up with a possible connection with Zinc sulphate.