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. 2008 Mar 1;39(1):115–121. doi: 10.1590/S1517-838220080001000025

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Supplementation of nitrogen sources. 1 yeast extract, 2 peptone, 3 urea, 4 corn steep solids, 5 (NH₄)₂HPO₄, 6 KNO₃, 7 NH₄HCO₃, 8 NH₄Cl, 9 (NH₄)₂SO₄, 10 control (without nitrogen supplement). The culture conditions were particle size of wheat bran: 500-1000 μm; moisture: 70%; pH of the mineral salt solution: 6.0; inoculum size 5 mL and temperature 30°C with 1% pectin as carbon supplement. The mineral salt solution used for the experiment was devoid of (NH₄)₂SO₄.