Protective Effect of β-Carotene Extracted From the Cyanobacterium Oscillatoria brevis Against Stress-Induced Alterations of Circadian Behavior and Oxidative Markers rhythms in Rat Journal title: IOSR Journal of Pharmacy (IOSRPHR) Authors: Alaa El-Din Sallam , Menatallah M. Mohammed , Aida A. Hussein , Zohour I. Nabil Subject(s):