Estimation of growth rate, biosilica, protein and lipid content in locally isolated fragellaria vaucheria

الملخص AR

The study was conducted in Mosul city, northern Iraq to obtain a local isolate of the algal, Fragellaria vaucheria (Bacillariophycophyta) .

Maximum biomass (58 mg/l) was obtained after seven days of incubation.

The ratio of precipitated biosilica in the cellular walls ranged between 30 to 35 % of the dry weight of the biomass.

The amount of biosilica increased with progress of incubation period.

The infra red spectrum test showed the high purity of isolated silica.