**4.2 Estimation of exopolysaccharides (EPS) yield from supernatant of**  *phormidium tenue* **under varying concentration of extracting solvents**

EPS yield in terms of released polysaccharides (RPS) in both the cyanobacterial species using different extraction solvents viz. acetone, ethanol, and EDTA respectively taken in varying ratios with respect to the supernatant. All the three solvents gave a higher yield of EPS under supernatant: solvent ratio of 1:2 with acetone emerging out to be the best extraction solvent for cyanobacteria the test organisms.