para-aminobenzoic acid

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par·a-a·mi·no·ben·zo·ic acid

 (păr′ə-ə-mē′nō-bĕn-zō′ĭk, -ăm′ə-)
n.
See PABA.

para-aminobenzoic acid

n
(Biochemistry) biochem an acid present in yeast and liver: used in the manufacture of dyes and pharmaceuticals. Formula: C6H4(NH2)COOH

par′a-a•mi•no•ben•zo′ic ac′id

(ˈpær ə əˌmi noʊ bɛnˈzoʊ ɪk, -ˌæm ə noʊ-)

n.
a yellowish, crystalline solid, C7H7NO2, that is a component of the vitamin B complex. Abbr.: PABA
[1905–10]
References in periodicals archive ?
Note that the two substances that did not meet the OECD EC ranges (lactic acid and 4-aminobenzoic acid) were correctly classified but due to the top doses used it was not possible to meet the specified EC ranges.
[alpha]-D-galactose, 4-aminobenzoic acid and all fatty acids were purchased from Sigma-Aldrich and used as purchased without further purification.
Benzocaine (ethyl ester of 4-aminobenzoic acid) was purchased from Changzhou Sunlight Pharmaceutical Co., Ltd., China.
4-Aminobenzoic acid ethyl ester (98%) and 4-nitroaniline (98%) were purchased from J&K chemicals, Beijing, China.
Goto, "Reversed-phase high-performance liquid chromatography of disaccharides labeled by 4-aminobenzoic acid ethyl ester," Der Pharma Chemica, vol.
4-Aminobenzoic acid hydrazide (ABAH), O-dianisidine, and NaOCl were purchased from Sigma-Aldrich (St.
The 4-aminobenzoic acid, 4-aminothiophenol, sodium nitrite (NaN[O.sub.2]), 3-thiopheneethanol, and L-cysteine (L-cys) were purchased from Sigma-Aldrich (USA), while 1,4-phenylenediamine and 4-aminophenol were purchased from Tokyo Chemical Industry Co., Ltd.
To amine-functionalize the pristine graphenes by one step [17, 18], 1 g of the pristine graphenes was treated in a solution composed of 4-aminobenzoic acid (0.5 g), polyphosphoric acid (84% [P.sub.2][O.sub.5] assay, 40 g) and [P.sub.4][O.sub.10] (5 g) for 2 h at 130[degrees]C.
In order to introduce the conjugated aromatic polymer and carboxylic acid group onto the surface of MWNTs, 4-carboxyphenyl diazonium salts were first synthesized by the diazotization reaction of 4-aminobenzoic acid (5.0 mmol) and sodium nitrite (NaN[O.sub.2], 5.0 mmol) in 0.5 mol HCl solution (10 mL).
We also investigated how the cellular effects of BT were modified by hydrogen peroxide (H202) scavenger catalase, hypochlorous acid (HOCl) scavenger methionine, and 4-aminobenzoic acid hydrazide (ABAH), a myeloperoxidase (MPO)-specific inhibitor.