p-aminobenzoic acid

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p-aminobenzoic acid

 (PAB) (PABA) [ah-me″no-ben-zo´ik]
a substance required for the synthesis of folic acid by many organisms; it is included in the B vitamin complex, although it is not an essential nutrient for humans. It is synthesized by many bacteria; sulfonamides act by blocking its synthesis; it also absorbs ultraviolet light, specifically UVB rays, and is used as aminobenzoic acid as a topical sunscreen.

p-a·mi·no·ben·zo·ic ac·id (PABA),

(ă-mē'nō-ben-zō'ik as'id),
4-aminobenzoic acid, a factor in the vitamin B complex, required for biosynthesis of folate; neutralizes the bacteriostatic effects of the sulfonamides because it furnishes an essential growth factor for bacteria; elevated concentrations of the sulfonamides interfere with use of this agent and of folates; used as an ultraviolet screen in lotions and creams. It is produced in a test of pancreatic function.

p- aminobenzoic acid

/p- ami·no·ben·zo·ic ac·id/ (PABA) (-ben-zo´ik) a substance required for folic acid synthesis by many organisms; it also absorbs ultraviolet light (UVB rays) and is used (called also aminobenzoic acid ) as a topical sunscreen.

p-ami·no·ben·zo·ic acid

(PABA) (ă-mē'nō-ben-zō'ik as'id)
A factor in the vitamin B complex, a part of all folic acids and required for its formation; neutralizes the bacteriostatic effects of the sulfonamides because it furnishes an essential growth factor for bacteria, with the use of which sulfonamides interfere; used as an ultraviolet screen in lotions and creams.

p-aminobenzoic acid

see para-aminobenzoic acid. Called also PABA.
References in periodicals archive ?
Pristine graphenes were prepared from graphite powder by chemical method and the amine-functionalized graphenes were prepared successfully via treating them with 4-aminobenzoic acid in polyphosphoric acid.
4-nitrophenol, 2-aminobenzoic acid, benzamide, 4-aminobenzoic acid, resorcinol, obromonitrobenzene and 2-nitroaniline were used as active aromatic coupling compounds for the second step.
Summary: A series of Schiff bases of pyridine-4-carbaldehyde with 3-aminobenzoic acid, 2- aminobenzoic acid, 4-aminobenzoic acid, 1,3-phenylenediamine, 1,2-phenylenediamine, 2- aminothiophenol, 4-aminoantipyrene, 2-aminophenol and naphthalene-1-amine was synthesized and compounds were characterized by FTIR, NMR and mass spectrometry.
All the chemicals, including 4-aminobenzoic acid, ferrocene, hexadecyltrimethyl ammonium bromide and sodium nitrite were purchased form Sigma Aldrich and were used without purification while tribenzyltin chloride and dibenzyltin chloride was prepared by the literature method [29].