放線菌の生産する抗菌性物質に關する研究 : (第2報)<Streptomyces vinaceus>___→のX線照射變種について

概要

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Kelner has reported that by treating the saline suspensions of conidia of the A.flaveolus with doses ranging from 25.000 to 300.000. Rontogen units, the percentage of the survivors and mutants among them were investigated and about 24 per cent of the survivours of a suspension treated with 200.000τ units were mutants.1. In order to obtain more active cultures of St. vinaceus, it was treated with doses ranging from 50.000τ to 110.000τ, and the results were as follows.2,When taeated with 50.000τ, about 74 per cent of the survivors were mutants which lost the antibiotic power against E. coli, and other 26 per cent decrease the power in accordance with the gradual change of original properties.3. The greater part of conidia was killed by treating with 70.000 to 110.000τ, and all survivors were mutants without antibiotic properties.
公益社団法人日本生物工学会の論文
1949-05-15