title: Effect of some ultraviolet light absorbers on photo-stabilization of azadirachtin-A.
abstract: The effect of photo-stabilization of Azadirachtin-A (Aza-A) was examined when exposed to sunlight and ultraviolet light in the presence of four structurally different ultraviolet stabilizers namely 4-aminobenzoic acid, 2,4-dihydroxybenzophenone, 4,4'-dihydroxybenzophenone and phenyl salicylate. The percentages of Aza-A recovered at different time intervals from slides exposed to different light conditions with and without UV stabilizers as well as kinetic studies indicated that the addition of phenyl salicylate in methanolic solution of Aza-A (in 1:1 mole ratio) provides the best photo-stabilization of Aza-A molecule among the four UV stabilizers studied.
authors.affiliation: Department of Applied Chemistry, Faculty of Technology & Engineering, M.S. University of Baroda, Vadodara, India. deotapt@yahoo.com
authors.forename: P T
authors.initials: PT
authors.lastname: Deota
authors.forename: P R
authors.initials: PR
authors.lastname: Upadhyay
authors.forename: K B
authors.initials: KB
authors.lastname: Patel
authors.forename: K J
authors.initials: KJ
authors.lastname: Mehta
authors.forename: A K
authors.initials: AK
authors.lastname: Varshney
authors.forename: M H
authors.initials: MH
authors.lastname: Mehta
mesh_terms: D031601:Azadirachta / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D004355:Drug Stability; D008027:Light; D036701:Limonins / Q000737:chemistry* / Q000528:radiation effects*; D015394:Molecular Structure; D010782:Photolysis / Q000528:radiation effects; D012639:Seeds / Q000737:chemistry; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D036701:Limonins; C010329:azadirachtin