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In this work, experiments have been carried out to study the impact of various stress factors present in the culture medium on the growth and bio-compound production for the microalgae species Porphyridium purpureum. Samples of microalgae have been grown under various stress conditions in a thermostated incubator under mixing and artificial light. Biomass production was determined by removing the cells through centrifugation followed by lyophilization. For exopolysaccharides isolation, the precipitation method wit...