title: In vitro evaluation of UV opacity potential of Aloe vera L. gel from different germplasms.
abstract: In this study, lyophilized crude and methanolic extracts of aloe gel from different germplasms (S24, RM, TN, OR, and RJN) of Aloe vera L. were tested for their ultraviolet (UV) opacity potential. UV absorption profiles, sun protection factor (SPF), and percentage blocking of UVA and UVB were considered to test UV opacity potential. Both the extracts showed UV absorption and followed the same path in the wavelength range of 250-400 nm in all the germplasms. Methanolic extract showed a stronger absorptivity than the crude lyophilized extract. Among the tested germplasms, maximum UV opacity property with a SPF of 9.97% and 79.12% UVB blocking was obtained with RJN, whereas a poor response was evident in TN with a SPF of 1.37% and 28.5% UVB blocking at 4 mg/ml methanolic extract. To our knowledge the present work for the first time documents UV opacity properties of A. vera L. gel and opens up new vistas in Aloe gel characterization.
authors.affiliation: Department of Agricultural and Food Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India.
authors.forename: M Shyam
authors.initials: MS
authors.lastname: Kumar
authors.forename: P K
authors.initials: PK
authors.lastname: Datta
authors.forename: S
authors.initials: S
authors.lastname: Dutta Gupta
mesh_terms: D000504:Aloe / Q000737:chemistry* / Q000235:genetics; D005612:Freeze Drying; D005782:Gels; D000432:Methanol / Q000737:chemistry; D010936:Plant Extracts / Q000494:pharmacology*; D012997:Solvents / Q000737:chemistry; D013473:Sunscreening Agents / Q000302:isolation & purification / Q000494:pharmacology*; D014466:Ultraviolet Rays / Q000009:adverse effects*
chemical_list: D005782:Gels; D010936:Plant Extracts; D012997:Solvents; D013473:Sunscreening Agents; D000432:Methanol