The present study of the production and properties of an antibiotic was undertaken in the hope that some useful information could be contributed to a long-range investigation program being carried on at North Texas State Teachers College. This program is concerned with the production of a useful antibiotic from a variant of the Penicillium notatum-chysogenum group of molds.
Little is known concerning the production and significance of bacterial pigments. There is seemingly an open field for studying the effects produced by varying the nutritive content of culture media upon which organisms are grown. This has led to an especial interest in, and the purpose of this investigation.
This investigation had for its aim the determination of the effects of various materials, added to the basic culture medium, upon pigment production of the four chromogens Staphylococcus aureus, Sarcina lutea, Serratia marcescens, and Rhodococcus cinnabaris.
This investigation has for its aim the explanation of growth and pigment production of Micrococcus flavus, Micrococcus roseus, Micrococcus subvitreus, and Sarcina citrea by the addition of various nutrient test materials to a standard culture medium.
This study had for its aim the collection, identification, and listing of the spermatophytes growing upon the Austin Chalk formation of Collin County, Texas.
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