A contribution to an investigation of nitrogen metabolism of some thermophilic and thermophilous soil fungi

The author has examined the assimilation of nitrogen on the basis of different sources of nitrogen and the secretion of nitrite to the substrate by some soil fungi. The following species of thermophilic and thermophilous fungi have been investigated: <i>Malbranchea pulchella</i> Saccardo et Penzig var. <i>sulfurea</i> Miehe, <i>Humicola lanuginosa</i> (Griffon et Maublanc) Bunce. <i>Sporotrichum thermophile</i> Apinis, <i>Thielavia sepedonium</i> Emmons, <i>Paecilomyces varioti</i> Bainier, <i>Aspergillus fumigatus</i> Fresenius, A. terreus Thom.