Heavy metals enter into the food chain via anthropogenic and natural sources and are persistent, ubiquitous and non-biodegradable with long biological half- lives. They can enter into the birds through the food chain and are accumulated in various body organs/tissues, maternally transferred to their eggs. Heavy metals such as Fe, Cu, Cr, and Zn are essential for metabolic activities, but become toxic at higher concentrations and can cause teratogenic, mutagenic and carcinogenic effects in biological organisms. The book emphasis on the critical monitoring of heavy metals in poultry eggs. Это и многое другое вы найдете в книге Extent of Heavy Metals in Poultry Eggs in District Peshawar-Pakistan (Muhammad Shahid ul Islam and Mohsin Zafar)