The crystal morphology and growth kinetic mechanisms of para-aminobenzoic acid
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چکیده
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Para-aminobenzoic Acid Production by Staphylococci
1. Strains of staphylococci produce diazotizable materials which can be converted to a dye, and the intensity of the color reaction can be quantitated in the same manner as p-aminobenzoic acid. The sulfonamide-resistant strains which we have studied produce more diazotizable substance than non-resistant strains. 2. The development of a color by the diazotizable substance can be inhibited by exp...
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Present knowledge of the function of para-aminobenzoic acid (PABA) has been derived almost exclusively from sulfanilamide (SAN) inhibition studies. Shive and Roberts (1946) have advanced the hypothesis that PABA is catalytically active in the synthesis of a number of metabolic products in Escherichia coli and that the enzyme systems concerned in their production are differentially sensitive to ...
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15 صفحه اولCrystal Growth, Optical and Thermal Studies of 4-Nitroaniline 4- Aminobenzoic Acid: A Fluorescent Material
The organic single crystals of 4-nitroaniline 4aminobenzoic acid (4NAABA) were grown from ethanol solvent. The grown crystals have been confirmed from single crystal XRD analysis. The UV absorption was carried out which shows the cutoff wavelength around 459 nm. The optical band gap of the crystal has been evaluated from the absorption spectra and absorption coefficient by extrapolation techniq...
متن کاملThe Isolation and Identification of Para-aminobenzoic Acid Produced by Staphylococci Resistant to Sulfonamide
Previous studies have shown that when Staphylococcus aureus becomes resistant to sulfonamides, an antisulfonamide substance is produced in the growth medium. Although these studies suggested that the substance was p-aminobenzoic acid (PABA), isolation and positive identification were not achieved. Because of the importance of these observations, unequivocal identification of the product was att...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations and Advances
سال: 2017
ISSN: 2053-2733
DOI: 10.1107/s2053273317092245