Studies on bacterial catalase are diversifying.

Studies on the Effect of Temperature on the Catalase Reaction. Ii. Loss of Catalase Activity

In the preceding paper (1) the possibility of spontaneous inactivation of the enzyme by heat has been mentioned as a factor responsible for the diminished catalase activity, especially at temperatures above 20°C. To determine to what extent this may have played a r61e in the experiments at different temperatures, the activity of catalase subjected for various lengths of time to the influence of...

Studies on Bacterial Localization

THE RESULTS OF GROSS AND MICROSCOPIC OBSERVATIONS AND SURVIVAL TESTS AFTER SUBCUTANEOUS INFECTION OF MICE WITH TYPE I PNEUMOCOCCI CAN BE SUMMARIZED AS FOLLOWS: Normal mice possessed no adequate means of protection against this organism. The bacteria disseminated freely through the tissue spaces in the presence of widespread inflammation, and were not ingested by significant numbers of host cell...

Studies on Bacterial Nutrition

1. Certain anaerobic bacteria grow under aerobic conditions in plain broth in the presence of sterile unheated plant tissue. 2. Aerobic growth of anaerobic bacteria under the above conditions may be related to the presence of growth-accessory substances, and to the action of oxidizing-reducing systems of plant tissue in the destruction of toxic peroxides of bacterial origin.

Studies on Bacterial Enzymes

The meningococcus cell contains a peptonase enzyme which hydrolyzes the peptides and similar constituents of commercial "peptone." The activity of this enzyme is independent of the presence of the formed bacterial cell. The peptonase enzyme is more resistant to heat and to oxidation than is the maltase enzyme of the same bacteria.

Studies on the Inactivation of Catalase Iii. Destruction of Catalase by Hydrogen Peroxide by Sergius Morgulis