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Noun

para aminobenzoic acid - a metabolic acid found in yeast and liver cells; used to make dyes and drugs and sun blockers

sun blocker, sunblock, sunscreen - a cream spread on the skin; contains a chemical (as PABA) to filter out ultraviolet light and so protect from sunburn

acid - any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt

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References in periodicals archive

Synthetic P2 medium had the following composition (in g/L): yeast extract, 1; K[H.sub.2][Po.sub.4], 0.5; [K.sub.2]HP[O.sub.4], 0.5; para aminobenzoic acid, 0.001; thiamin, 0.001; biotin, 1 x [10.sup.-5]; Mg[So.sub.4]*7[H.sub.2]O, 0.2; Mn[So.sub.4]*7[H.sub.2]O, 0.01; [Fe.sub.2][So.sub.4]*7[H.sub.2]O, 0.01; NaCl, 0.01; and ammonium acetate, 2.2 [15].

Enhanced butanol production by Clostridium acetobutylicum NCIMB 13357 grown on date fruit as carbon source in P2 medium

* Ethanol or ethanol containing 5% para aminobenzoic acid (PABA) was applied to pieces of human skin prior to exposure to 30 mJ [cm.sup.-2] solar simulated radiation.

Use of sunscreen and vitamin D production

* Para aminobenzoic acid (oldest sunscreen to be used, causes staining of clothes)

Photoprotection: a public awareness

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