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UV-ABC screens of luteolin derivatives compared to edelweiss extract.
J Photochem Photobiol B
April 2011
Institute of Life Technologies, HES-SO Valais, University of Applied Sciences Western Switzerland, Route du Rawyl 64, 1950 Sion, Switzerland.
Pure luteolin is a remarkably heat (200°C/6 days) and UV stable UV-A screen, however, native luteolin enriched to 37% in an edelweiss extract lost its UV-A screen properties upon UV irradiation (∼4MJm(-2)). This contrasting behavior led to the examination of a series of purified luteolin derivatives as UV screen candidates. 3',4',5,7-Tetralipoyloxyflavones were synthesized from luteolin (3',4',5,7-tetrahydroxyflavone) and fatty acid chlorides.
View Article and Find Full Text PDFThe examination of UV-absorbers in 2-coat metallic and non-metallic automotive paints.
Sci Justice
May 2000
KT 13 Forensic Science Institute, Bundeskriminalmt, Wiesbaden, Germany.
Contact sensitivity to Tinuvin P in mice.
Contact Dermatitis
April 1994
Division of Medical Devices, National Institute of Hygienic Sciences, Tokyo, Japan.
The contact sensitizing potential of 2-(2'-hydroxy-5'-methylphenyl)benzotriazole (Tinuvin P) was investigated using the murine local lymph node assay (LLNA) and the mouse ear swelling test with some modification in the induction procedure (modified MEST). Topical exposure of the ears to Tinuvin P in acetone:olive oil (AOO) for 3 consecutive days induced no increase in auricular lymph node weight and lymph node cell proliferation. In the LLNA, Tinuvin P was negative, and its sensitizing potential was determined as not strong.
View Article and Find Full Text PDFEvaluation of sunlight stability of polyurethane elastomers for maxillofacial use. I.
J Biomed Mater Res
May 1978
The evaluation of the efficiency of polymer additives with special emphasis on uv absorbers and antioxidants in polyurethane elastomers has been completed. Aliphatic polyurethanes were chosen for this study because their properties closely relate to the requirements of maxillofacial prosthesis. The polyurethane elastomers were either synthesized by ourselves or formulated according to the manufacturer's recommendation.
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