Topic
Benzoic acid
About: Benzoic acid is a research topic. Over the lifetime, 11832 publications have been published within this topic receiving 167127 citations. The topic is also known as: Retardex & E210.
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TL;DR: In this article, four hyperbranched resins having fatty acid residues were synthesized and the physical and mechanical properties of the resins were determined by FTIR spectroscopy and DSC.
58 citations
TL;DR: Pyridinium-grafted-cellulose nanocrystals were prepared by a simple one-pot reaction using 4-(1-bromoethyl/bromomethyl)benzoic acid, pyridine and cellulose Nanocrystals (CNCs), which simplifies existing cationization methods, which leads to a higher grafting density while retaining the CNC crystallinity.
Abstract: Pyridinium-grafted-cellulose nanocrystals were prepared by a simple one-pot reaction using 4-(1-bromoethyl/bromomethyl)benzoic acid, pyridine and cellulose nanocrystals (CNCs). The grafting consists of an esterification reaction between 4-(1-bromoethyl/bromomethyl)benzoic acid and CNCs and a nucleophilic attack on the C–Br bond of 4-(1-bromoethyl/bromomethyl)benzoic acid by pyridine. This reaction simplifies existing cationization methods, which leads to a higher grafting density while retaining the CNC crystallinity.
58 citations
TL;DR: In this paper, a binary W18O49/holey ultrathin g-C3N4 nanosheets (HU-CNS) was prepared via a solvothermal method and it exhibited excellent photocatalytic activity for the selective oxidation of benzyl alcohol in an aqueous medium under room temperature and atmospheric pressure.
Abstract: Synthesis of intermediates and fine chemicals for the selective oxidation of alcohols to corresponding aldehydes and carboxylic acid is an extremely significant chemical reaction. Herein, a binary W18O49/holey ultrathin g-C3N4 nanosheets (HU-CNS) nanocomposite was prepared via a solvothermal method and it exhibited excellent photocatalytic activity for the selective oxidation of benzyl alcohol in an aqueous medium under room temperature and atmospheric pressure. The as-synthesized W18O49/HU-CNS composites showed higher selectivity and conversion efficiency compared to pure g-C3N4, which was mainly ascribed to the moderate adsorption capacity of benzaldehyde on the composite. The high conversion originates primarily from the following: (1) the W18O49/HU-CNS nanocomposite possessing a stronger ability to chemisorb alcohol than g-C3N4; (2) the oxygen vacancies on W18O49 nanowires not only supplied active centers for the activation of O2 to O2•– but also extended the range of light response from the visible t...
58 citations
TL;DR: The broad specificity of the anaerobic demethylation system suggests that it probably is significant in the degradation of lignoaromatic molecules in an aerobic environments.
Abstract: Vanillic acid (4-hydroxy-3-methoxybenzoic acid) supported the anaerobic (nitrate respiration) but not the aerobic growth of Pseudomonas sp. strain PN-1. Cells grown anaerobically on vanillate oxidized vanillate, p-hydroxybenzoate, and protocatechuic acid (3,4-dihydroxybenzoic acid) with O(2) or nitrate. Veratric acid (3,4-dimethoxybenzoic acid) but not isovanillic acid (3-hydroxy-4-methoxybenzoic acid) induced cells for the oxic and anoxic utilization of vanillate, and protocatechuate was detected as an intermediate of vanillate breakdown under either condition. Aerobic catabolism of protocatechuate proceeded via 4,5-meta cleavage, whereas anaerobically it was probably dehydroxylated to benzoic acid. Formaldehyde was identified as a product of aerobic demethylation, indicating a monooxygenase mechanism, but was not detected during anaerobic demethylation. The aerobic and anaerobic systems had similar but not identical substrate specificities. Both utilized m-anisic acid (3-methoxybenzoic acid) and veratrate but not o- or p-anisate and isovanillate. Syringic acid (4-hydroxy-3,5-dimethoxybenzoic acid), 3-O-methylgallic acid (3-methoxy-4,5-dihydroxybenzoic acid), and 3,5-dimethoxybenzoic acid were attacked under either condition, and formaldehyde was liberated from these substrates in the presence of O(2). The anaerobic demethylating system but not the aerobic enzyme was also active upon guaiacol (2-methoxyphenol), ferulic acid (3-[4-hydroxy-3-methoxyphenyl]-2-propenoic acid), 3,4,5-trimethoxycinnamic acid (3-[3,4,5-trimethoxyphenyl]-2-propenoic acid), and 3,4,5-trimethoxybenzoic acid. The broad specificity of the anaerobic demethylation system suggests that it probably is significant in the degradation of lignoaromatic molecules in anaerobic environments.
58 citations
Journal Article•
TL;DR: Rhodotorulic acid, a hydroxamic acid produced by and isolated from cultures of Rhodotorula pilimanae, was the most effective of all the compounds studied in inducing iron excretion and was more than twice as potent as desferrioxamine.
Abstract: 2,3-Dihydroxybenzoic acid has been identified as a potentially useful iron-chelating drug. Accordingly, we have evaluated a series of derivatives of hydroxylated benzoic acids for their ability to induce iron excretion in the iron-overloaded rat. In addition, we have examined a number of hydroxamic acids and some other naturally occurring iron-chelating agents. Of the 26 benzoic acid derivatives studied, none appeared to be more effective than 2,3-dihydroxybenzoic acid, for reasons which are discussed. Rhodotorulic acid, a hydroxamic acid produced by and isolated from cultures of Rhodotorula pilimanae, was the most effective of all the compounds studied in inducing iron excretion. When administered parenterally, rholotorulic acid induced iron excretion via both the urinary and the fecal routes and was more than twice as potent (on a weight basis) as desferrioxamine. Two ferrous chelators, alpha, alpha-dipyridyl ad 1,10-phenanthroline, induced a moderate amount of iron excretion, suggesting that a pool of ferrous iron may be available for chelation.
58 citations