Neurospora sitophilaによる廢資源の利用 (第4報) : 稲藁酸糖化液に於ける培養試驗 (其の2)

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By using rice straw hydolysate as the culture medium of Neurospara sitophila, the following results were obtained.1) The amounts of (NH_4)_2SO_4,KH_2PO_4 and KNO_3 fitted for the growth of this fungus were 20〜40%, 4〜10% and 1〜2% of the sugar respectibely.2) To prevent the medium from decreasing of pH which is caused by the growth of fungus, addition of CaCo_3 to the medium is necessary.3) When this fungus was cultivated at 30℃ for 3 days in the hydrolysate added with 30% (NH_4)_2SO_4,7% KH_2PO_4,1% KNO_3,0.5% MgSO_4・7H_2O on the baseis of the sugar and CaCo_8,the yield of fungus to the sugar consumed was 60.87 %.4) The amount of peptone fitted for the growth of this fungus was 20 % of the sugar. When this fungus was cultivated at 30℃ for 3 days in the hydrolysate added with 20 % peptone, 7 % KH_2PO_4,1 % KNO_3 and 0.5 % MgSO_4・H_2O on the basis of the sugar, the yield of fungus to the sugar cosumed was 69.81%. In the medium containing a large amount of peptone, the pigment of this fungus was scarcely produced.5) The chemical composition of the mycelium, which was obtained from the culture in the hydrolysate added with 30 %(NH_4)_2SO_4,7 % KNO_3,0.5 % MgSO_4・7H_2O on the basis of the sugar and CaCO_3 was as follows : Moisture 12.96 %, ash 5.04 %, crude fat 7.65 %, crude protein 48.31 %, crude fiber 10.52 %, nitrogen-free extract 15.52%, reducing sugar 1.24 %.6) In the hydrolytic decomposition products of the mycelium obtained from the culture in the rice straw hydrolysate at 30℃ for 5 days, the following twelve amino acids were detected by the paper partition chromatography, i.e., glycine, alanine, valine, leucine, serine, cystine, arginine, phenyl alanine, tyrosine, asparagine, glutamic acid and aspartic acid.
社団法人日本生物工学会の論文
1952-11-15

Neurospora sitophilaによる廢資源の利用 (第4報) : 稲藁酸糖化液に於ける培養試驗 (其の2)

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