The document discusses isolating and characterizing exopolysaccharides produced by Aspergillus niger fungus. A. niger was isolated from soil and screened for polysaccharide production. It was grown in media containing different carbon sources and pH levels, and maximum polysaccharide production of 86.9 mg/100ml was achieved at pH 7 over 15 days. Chromatographic and colorimetric analysis was used to analyze the polysaccharides. Exopolysaccharides have various applications including use in foods, medicines, cosmetics and industrial products.