1. Abd El Rahman HH (1996) Constraints and possibilities for their alleviation to improve utilization of desert natural range plants for grazing ruminants. Ph.D. thesis, Faculty of Agriculture Cairo University, Egypt
2. Abd El-Halim AM (2003) Studies of some anti-nutritional factors affecting forage utilization by ruminants. Ph.D. thesis, Faculty of Science Ain Shams University, Egypt
3. Acamovic T (2005) Biochemistry of plant secondary metabolites and their effects in animals. Symposium on ‘plants as animal foods: a case of catch 2?’ Symposium on ‘plants as animal foods: a case of catch’. Proc Nutr Soc 64:403–412
4. Aengwanich W, Suttajit M, Srikhun T, Boonsorn T (2009) Antibiotic effect of polyphenolic compound extracted from Tamarind (Tamarindus indica L.) seed coat on productive performance of broilers. Int J Poult Sci 8(8):749–751
5. Agostini-Costa Tânia da S, Vieira RF, Bizzo HR, Silveira D, Gimenes MA (2012) Secondary metabolites, chromatography and its applications. In: Dr. Sasikumar Dhanarasu (eds) ISBN: 978-953-51-0357-8, InTech. Available from: http://www.intechopen.com/books/chromatography-and-itsapplications/secondary-metabolites