312 A MANUAL OF THE ASPERGILLI 



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bearing on the sulfur and zinc metabolism of the fungus in an optimum solu- 

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nitrate nitrogen by Aspergillus niger. Jour. Agr. Res. 55: 891-902. 

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niger and Rhizopus nigricans. Univ. Kansas Sci. Bull. 25: 85-112. 

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Jour. Agr. Res. 58: 717-732. 

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growth of Aspergillus niger. Jour. Agr. Res. 59: 731-748. 

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of amino acids as the only source of carbon and nitrogen. Acta Phytochim. 



(Japan) 11: 261-98 (in German). 

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by Aspergillus niger. Compt. Rend. Soc. Biol. 135: 508. 

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Pigments and Coloting Substances 



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