para-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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

para-aminobenzoic acid

(păr′ə-ə-mē′nō-bĕn-zō′ĭk, -ăm′ə-)
n.
See PABA.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
References in periodicals archive ?
Other organic compounds (such as coenzyme Q10, beta carotene, taurine, choline, inositol, lecithin and para-aminobenzoic acid) and trace minerals (such as chromium, copper, zinc and selenium) may also be supplemented above the recommended daily requirements for age and size when the child has a mitochondrial disorder.
PABA (para-aminobenzoic acid), once the most common ingredient, often caused itching or rashes.
During the first 12 weeks, patients also took two ASE capsules daily between meals, containing 300 mg extracts of avocado, soybean, vitamin E, para-aminobenzoic acid, and phytosterols.
US 7,326,408 B2: A method for increasing the compliance in the use of topical sunscreens comprising a photostable, chemically stable and physically stable formulation for topical application to the skin for treating acne vulgaris and protecting skin from the harmful effects of chronic exposure to the sun comprising a vehicle, one or more sunscreen agents dissolved or suspended in the vehicle, which sunscreen agent is selected from the group consisting of titanium dioxide, zinc oxide, bisoctrizole, anisotriazine, para-aminobenzoic acid (PABA) and derivatives has been assigned to Dow Pharmaceutical Sciences, Petaluma, CA.