Date of Award

5-1934

Degree Type

Bachelors Essay

Degree Name

Bachelor of Science (BS)

Department

Chemistry

First Advisor

John R. Koch

Abstract

The subject of yeast has been widely studied from many viewpoints; we can find many bacteriological, physiological, and chemical papers on the subject. Besides the purely scientific work on yeast, there are numerous industrial investigations on this subject, since yeast growth and the products of yeast growth form the foundation for such important industries as the distilling, brewing, baking industries as well as commercial yeast manufacture. The effect of nitrogen fixation has been treated from all of these angles, scientific and industrial, and the investigations include the form in which the nitrogen is most easily assimilated, the manner of the assimilation, the utilization of the nitrogeneous matter in the yeast cell, and the effect of the nitrogen fixation upon the growth, the activity, and the formation of the excretion products by the various types of yeasts. However, almost no material is available which shows the effect of changing the concentration of the source of nitrogen and of utilizing a number of different salts containing nitrogen while keeping the concentrations of the other substance present in the sugar-salt culture medium constant and also showing the effect of aeration with oxygen upon the growth with the different sources of nitrogeneous material used. These then were chosen as the principal objects of this work.

Comments

A Thesis submitted to the Faculty of the College of Liberal Arts of Marquette University in Partial Fulfillment of the Requirements for the Degree of Bachelor of Science

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