List of Articles هتروسیست Open Access Article Abstract Page Full-Text 1 - The determination of N: P ratio in Cyanobacterial bloom of Anabaena flos- aquae in the Caspian Sea, Iran in situ Maryam Fallahi S.Mohammad Reza Fatemi Ali Mashinchian Atoosa Noori Koupaei Open Access Article Abstract Page Full-Text 2 - The effect of continuous illumination and photoperiods on growth and heterocyst frequency of cyanobacterium Fischerella ambigua from Golestan province Fereshte Vakili Kayvan Ghorchibeigi Neda Soltani Shadman Shokravi 10.30495/iper.2006.690227 Open Access Article Abstract Page Full-Text 3 - Identification of some heterocystous cyanobacteria isolated from rice fields of Mazandaran province with emphasis on multi-genic approach Sara Kabirnataj Ghorban Ali Nematzadeh Ahmad Farhad Talebi Meisam Tabatabai Prashant Singh