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.

Partitioning of aromatic molecules in aqueous biphasic systems

Abstract: Aqueous biphasic systems (ABS) may be suitable for the separation of aromatic molecules in industrial and environmental settings; hence it is invaluable to have predictive models of partitioning behavior in these systems for design and evaluation purposes. In a continuing study of the partition of small aromatic organic molecules, the distribution of several relatively hydrophilic substituted benzene species is reported. The partitioning behavior of five charged substituted benzene species (phthalic acid, 4-hydroxybenzoic acid, benzoic acid, salicylic acid, and p-toluic acid) and one uncharged species (1,3-dinitrobenzene) has been studied in ABS prepared from stock solutions of 40% (w/w) PEG-2000 and increasing concentrations of four water-structuring salts [K3PO4, K2CO3, (NH4)2SO4, and NaOH]. Comparison has been made with published data on the partitioning of these solutes in 1-octanol/water biphasic systems. In general, the partition of these species may be understood in terms of the free energ...

Volatile constituents of benzoin gums: Siam and Sumatra. Part 1

Abstract: The volatile extract composition of two different benzoin gums, Siam and Sumatra, were analysed by GC-MS. Twenty components representing more than 99.1% of the oil from Siam and 29 components representing more than 97.4% of the oil from Sumatra were analysed. The major components were benzyl benzoate (76.1-80.1%) for the two oils and benzoic acid (12.5%), methyl benzoate (1.5%) and allyl benzoate (1.5%) for Siam, and styrene (2.3%), cinnamic acid (3.5%) and benzyl cinnamate (3.3%) for Sumatra. Volatile compounds of oils and crushed benzoins were also studied using solid-phase microextraction (SPME) employing carboxen/polydimethylsiloxane and carbowax/divinylbenzene fibres. Copyright © 2003 John Wiley & Sons, Ltd.

The Action of Benzoic and Salicylic Acids on the Metabolism of Microorganisms

Abstract: Publisher Summary This chapter reviews investigations performed to elucidate the mechanism of action of benzoic and salicylic acids. The large amount of work on benzoic acid as a preservative has been discussed. It also discusses factors influencing inhibitor concentration at the place of action, with special reference to benzoic and salicylic acids. Benzoic and salicylic acids selectively inhibit various processes in intact bacterial cells. The chapter deals with the specific effectiveness of benzoic and salicylic acids in terms of their effects on various metabolic reactions. The chapter discusses experimental material which shows that benzoic and salicylic acids interfere with many enzymatic processes in microorganisms at concentrations that retard the growth rate. Both benzoic and salicylic acids are compounds with comparatively small possibilities to chemical specificity. The fact that they nevertheless show a certain selectivity in their action are related to their high lipoid solubility, which presumably cause them to accumulate on the cell membrane or on various structures and surfaces in the bacterial cell. It has been pointed out that many of the effects discussed in this chapter are due to an interference with the energy metabolism of the bacterial cell.