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Dive into the research topics where Jean Dufrenoy is active.

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Featured researches published by Jean Dufrenoy.


Cellular and Molecular Life Sciences | 1951

Antagonism between streptomycin and para-aminosalicylic acid

Kshitish J. Divatia; Grace Gardner; Jean Dufrenoy; Robertson Pratt

Ein gegen Streptomycin empfindlicher Stamm vonEscherichia coli kann durch tägliches mehrfaches Überimpfen in eine Nährlösung mit steigendem Gehalt an Antibiotikum gegenüber Streptomycin resistent gemacht werden. Dieser Stamm wächst — wenn genügend Zeit gelassen wird — in einer Lösung, die 300 mg Streptomycin pro Liter enthält. Er zeigt auch normales Wachstum in Agar ohne Streptomycin und im gleichen Medium, das 0 bis 100 × 10−8 Molep-Aminosalizylsäure per cm3 enthält. Die Bakterien wachsen hingegen nicht bei einer Konzentration von 1000 × 10−8 Mole PAS pro cm3, wenn nicht Streptomycin hinzugefügt wird. In diesem Fall scheint Streptomycin die wachstumshemmende Wirkung großer PAS-Konzentrationen zu neutralisieren.


Journal of The American Pharmaceutical Association | 1951

Report on Antibiotic Activity of Seaweed Extracts

Robertson Pratt; Henry G. Mautner; Grace Gardner; Yi-Hsien Sha; Jean Dufrenoy


Journal of The American Pharmaceutical Association | 1950

Vitamin K5 as an antimicrobial medicament and preservative.

Robertson Pratt; Jean Dufrenoy; Peter P. T. Sah; John Oneto; Donald C. Brodie; Sidney Riegleman; Virginia L. Pickering


American Journal of Botany | 1948

Histo-Physiological Localization of the Site of Reducing Acitivity in Stalks of Sugar Cane

Jean Dufrenoy; Robertson Pratt


Journal of Bacteriology | 1948

The Enhancement of Penicillin Effectiveness in Vivo by Traces of Cobalt

Robertson Pratt; Jean Dufrenoy; Louis A. Strait


Bacteriological Reviews | 1948

CYTOCHEMICAL INTERPRETATION OF THE MECHANISM OF PENICILLIN ACTION

Robertson Pratt; Jean Dufrenoy


Journal of Bacteriology | 1947

Cytochemical Mechanisms of Penicillin Action: III. Effect on Reaction to the Gram Stain in Staphylococcus aureus.

Jean Dufrenoy; Robertson Pratt


Journal of Bacteriology | 1947

Cytochemical Mechanisms of Penicillin Action: I. Oxidation-Reduction Levels.

Jean Dufrenoy; Robertson Pratt


Journal of Bacteriology | 1947

Cytochemical Mechanisms of Penicillin Action. II. Changes in Reactions of Staphylococcus aureus to Vital Dyes.

Robertson Pratt; Jean Dufrenoy


Proceedings of the National Academy of Sciences of the United States of America | 1948

Vitamin K5 as an Inhibitor of the Growth of Fungi and of Fermentation by Yeast

Robfrtson Pratt; Peter P. T. Sah; Jean Dufrenoy; Virginia L. Pickering

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Frank M. Goyan

University of California

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Grace Gardner

University of California

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