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May 26, 1928


JAMA. 1928;90(21):1723-1724. doi:10.1001/jama.1928.02690480045022

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A New Method of Sterilizing Cultures of Micro-Organisms  Dr. Philibert, agrégé professor and head of microbiologic research at the Faculté de médecine de Paris, with the collaboration of MM. Courtier and Risler, heads of research departments at the Sorbonne, have discovered a method of sterilizing cultures of micro-organisms. A new electric lamp with very slender filaments of aluminum is employed. Under the action of a strong current, the filaments burn with a disruptive discharge and with volatilization of the aluminum. In this short space of time, radiations are produced that are more penetrative than ultraviolet rays and approach the penetration of roentgen rays. These radiations have a highly destructive action on cultures of micro-organisms. The staphylococcus is, destroyed in one twenty-fifth of a second, or 150 times more rapidly than with a mercury vapor lamp, which generates ultraviolet radiations of 3,500 candle power. Other micro-organisms besides the staphylococcus have been

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