Objective: to observe the inhibitory effect of anti-streptococcus mutants Hen egg yolk (IgY) on production of acid by streptococcus mutants.

The unfolding of hen egg white lysozyme induced by urea and guanidine hydrochloride (GuHCl) has been studied by "phase diagram" method of fluorescence.

The Hen Egg, as it became known was crafted from gold, its opaque white enameled 'shell' opening to reveal its first surprise, a matte yellow gold yolk.