... associated with the increased activity of carbonic anhydrase, improving the quality of egg shell and the presence of manganese has an activator influence on the calcification and resistance of ... www.arpnjournal.com Arias, J.L., D .A Carrino, M.S Fernandez, J.E Rodrigues, J.E Denis and A. I Capln, 1992 Partial biochemical and immunological characterization of avian eggshell extracellular matrices Arch ... by-products and waste materials that may be a problem to dispose Eggshells are waste materials from hatcheries, homes and fast food industries (Phil and Zhihong, 2009; Amu et al., 2005) and disposal contributes...