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A. niger IMI 41873 was shake-cultured in Cassava starch medium, then mycelial dry weight and mycelial protein were measured. The effects of Cassava starch concentrations, various nitrogen sources and concentrations on the levels of mycelial production and mycelial protein were investigated. The results were as follows; In each medium containg 4%, 6%, 8% and 10% of Cassava starch, mycelial production was 13.35 ㎎/㎖, the medium containg 6% of Cassava starch was proved to be most effective. The levels of mycelial protein in shake culture with medium of 6% Cassava starch and NaNO₃(1.5g/ℓ) were the highest. Among nitrate, ammonium sulfate, and urea, the nitrate was the most effective on mycelial production.
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