Effect of Anti Browning Agents on Partial Purified Polyphenol Oxidase of Hawthorn (Crataegus Spp) Journal title: International journal of Advanced Biological and Biomedical Research Authors: Shahriar Saeidian| Assistant professor of Biochemistry, Department Of Biology, Payame Noor Universit... Subject(s): Biological Sciences, Biochemistry, Microbiology, Molecular Biology, Anatomy, Physiology