p-Hydroxybenzoic acid fromCentaurea polypodiifolia
نویسندگان
چکیده
منابع مشابه
p-Hydroxybenzoic acid synthesis in Mycobacterium tuberculosis.
Glycosylated p-hydroxybenzoic acid methyl esters and structurally related phenolphthiocerol glycolipids are important virulence factors of Mycobacterium tuberculosis. Although both types of molecules are thought to be derived from p-hydroxybenzoic acid, the origin of this putative biosynthetic precursor in mycobacteria remained to be established. We describe the characterization of a transposon...
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p-Aminobenzoic acid (PABA) exerts three metabolic effects on E. coli: it acts as a normal vitamin at low concentrations, as a source of another vitamin, p-hydroxybenzoic acid (POB), at moderate concentrations, and as a growth inhibitor at high concentrations (150 to 1600 microg./ml.). The inhibition is competitively reversed by POB in 1/100 the concentration of PABA. The inhibition is also reve...
متن کاملThe synthesis and biological evaluation of mycobacterial p-hydroxybenzoic acid derivatives (p-HBADs).
Mycobacterium tuberculosis establishes chronic infection and causes disease through manipulation of the host's innate and adaptive immune response. The bacterial cell wall is highly complex and contains a rich variety of glycosylated compounds that are secreted during infection and have been proposed as immunomodulatory molecules. Amongst the most important of these are the p-hydroxybenzoic aci...
متن کاملSynthesis of p-Hydroxybenzoic Acid and Salicylic Acid from Alkali Phenoxides in N,N-Dimethylformamide (1)
In a previous report, the synthesis of p-hydroxybenzoic acid and salicylic acid from alkali phenoxides and carbon dioxide in aprotic-polar solvents was reported. In the present study, the effects of reaction conditions on the yields and the rule of orientation under atmospheric pressure were examined in a typical aprotic-polar solvent, N,N-dimethylfomamide. Stabilities of the alkali salts of p-...
متن کاملGrowth of Azotobacter chroococcum in chemically defined media containing p-hydroxybenzoic acid and protocatechuic acid.
Growth and utilization of different phenolic acids present in olive mill wastewater (OMW) by Azotobacter chroococcum were studied in chemically defined media. Growth and utilization of phenolic acids were only detected when the microorganism was cultured on p-hydroxybenzoic acid at concentration from 0.01% to 0.5% (w/v) and protocatechuic acid at concentration from 0.01% to 0.3% (w/v) as sole c...
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ژورنال
عنوان ژورنال: Chemistry of Natural Compounds
سال: 1983
ISSN: 0009-3130,1573-8388
DOI: 10.1007/bf00575719