Part IV.- Quantitative examination by the carbon balance sheet method of the types of products formed from glucose by species of Penicillium (including Citromyces )

Abstract

The work described in Part III of this series, dealing with the preparation of carbon balance sheets for species of Aspergilus , was continued on exactly the same lines, using species of Penicillium as the organisms for study. The methods used were exactly the same as those described in Parts II and III, the same medium being used, the same temperature of incubation, 23°-25° C. and the same methods of cultivation and analysis. The results obtained are given in the following pages and are arranged in groups according to the classification of the Penicillia adopted by Thom in his recent book ‘ The Penicillia ’ (The Williams and Wilkins Co., 1929). The whole of the cultures of Penicillium, amounting in all to about a hundred species, were sent to Dr. Thom and were examined by him. In some cases these cultures are described in his book and in all cases Dr. Thom gave his opinion as to the correct names to be applied to the different species. The history of the species used and Dr. Thom’s comments on them will be found in an Appendix at the end of this paper. We desire to take this opportunity of thanking Dr. Thom for his very kind co-operation.