hydroxybenzoic acid


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Noun1.hydroxybenzoic acid - a crystalline derivative of benzoic acid
hydroxy acid - any acid that has hydroxyl groups in addition to the hydroxyl group in the acid itself
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Phenolic acids are divided into 2 types: 1-) Benzoic acid and derivates, 2-) Cinnamic acid and derivates a)Benzoic acid and derivates: The concentration of hydroxybenzoic acid in plants is usually very small, a certain amount of it is found in red fruits, onion and black radish (4).
It is a well-known fruit because of its high antioxidant activity for the presence of anthocyanins (delphinine, peonidin, malvidin, and cyanidin) and other phenolic compounds (quercetin, myricetin, gallic acid, ellagic acids, hydroxycinnamic and hydroxybenzoic acid derivatives, and others) in very high concentrations.
Phenolic acids can be subclassified as hydroxybenzoic acid and hydroxycinnamic acid, which are, respectively, derived from the phenolic molecules benzene and cinnamic acid [16].
The coumaric acid and the hydroxybenzoic acid potentiate the IAA oxidase system, responsible for its inactivation, causing the roots inhibition (Souza Filho & Alves, 2002).
Also, they are characterized by a high phenolic acid content, especially hydroxycinamic and hydroxybenzoic acid derivates [5, 6].
After 42 h <5% of 1e was converted and only hydroxybenzoic acid 7 was identified by HPLC (Figure 7).
This family of compounds includes derivatives of hydroxycinnamic acid (HCA), the most widely distributed group of phenolic compounds, and hydroxybenzoic acid (HBA).
The enzyme was incubated with derivatives of hydroxycinemic acid such as ferulic acid (0.02-0.08 [micro]M), caffeic acid (1.0-4.5 [micro]M), a hydroxybenzoic acid derivative like protocatechuic acid (1.0-4.5 [micro]M) and growth hormones like indol 3-acetic acid (1.04.5 [micro]M) with fixed enzyme concentrations.
Some of these compounds were ferulic acid (4-hydroxyl-3-methoxy-cinnamic acid), p-coumaric acid (4-hydroxy-cinnamic acid), and vanillic acid (hydroxybenzoic acid).
On one hand, alkaline hydrolysis of the cell walls of infected foliar tissue or potato tubers releases two types of phenolic compounds, derivatives of hydroxybenzoic acid and amides of hydroxycinnamic acid (Friend, 1985).
Occurrence and content of hydroxycinnamic and hydroxybenzoic acid compounds in foods.
Of the three isomers of hydroxybenzoic acid, only 2-hydroxybenzoic acid (salicylic acid) is an analgesic.