EFFECT OF SOME NATURAL UV-ABSORBERS ON THE PHOTOSTABILIZATION OF ACTIVE INGREDIENTS IN GERMAN CHAMOMILLE FLORAL EXTRACTS: PART I

The effect of some natural UV absorbers on the photostabilization of spiroketal enol ethers (en-yn-dicycloethers) present in German Chamomille extracts pre-coated on glass plates (solid phase) was examined. Plates were exposed to sunlight radiation from a UV-sun radiation lamp, in the presence and a...

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Autores principales:	LUCERO,A, REBOLLEDO,C, BUONO-CORE,G.E
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2012
Materias:	spiroketal enol ethers German Chamomille photostabilization UV absorbers
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000300024
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spelling	oai:scielo:S0717-970720120003000242019-02-19EFFECT OF SOME NATURAL UV-ABSORBERS ON THE PHOTOSTABILIZATION OF ACTIVE INGREDIENTS IN GERMAN CHAMOMILLE FLORAL EXTRACTS: PART ILUCERO,AREBOLLEDO,CBUONO-CORE,G.E spiroketal enol ethers German Chamomille photostabilization UV absorbers The effect of some natural UV absorbers on the photostabilization of spiroketal enol ethers (en-yn-dicycloethers) present in German Chamomille extracts pre-coated on glass plates (solid phase) was examined. Plates were exposed to sunlight radiation from a UV-sun radiation lamp, in the presence and absence of gallic acid, cinnamic acid, caffeic acid, ferulic acid and aloin, all natural UV absorbers. At particular intervals the remaining concentration of the en-yn-dicycloethers was analyzed by HPLC. Using first-order kinetic equation, the dissipation half-life values (DT50) for the degradation of the en-yn-dicycloethers under UV-sun radiation were obtained. The results showed that the addition of cumaric acid and caffeic acid provided moderate degree of photostabilization of the en-yn-dicycloethers and that addition of ferulic acid provided the best photostabilization among the UV absorbers studied. Photostabilization effect appears to be due to a competitive energy absorption of UV photons by the absorber molecules.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.57 n.3 20122012-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000300024en10.4067/S0717-97072012000300024
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	spiroketal enol ethers German Chamomille photostabilization UV absorbers
spellingShingle	spiroketal enol ethers German Chamomille photostabilization UV absorbers LUCERO,A REBOLLEDO,C BUONO-CORE,G.E EFFECT OF SOME NATURAL UV-ABSORBERS ON THE PHOTOSTABILIZATION OF ACTIVE INGREDIENTS IN GERMAN CHAMOMILLE FLORAL EXTRACTS: PART I
description	The effect of some natural UV absorbers on the photostabilization of spiroketal enol ethers (en-yn-dicycloethers) present in German Chamomille extracts pre-coated on glass plates (solid phase) was examined. Plates were exposed to sunlight radiation from a UV-sun radiation lamp, in the presence and absence of gallic acid, cinnamic acid, caffeic acid, ferulic acid and aloin, all natural UV absorbers. At particular intervals the remaining concentration of the en-yn-dicycloethers was analyzed by HPLC. Using first-order kinetic equation, the dissipation half-life values (DT50) for the degradation of the en-yn-dicycloethers under UV-sun radiation were obtained. The results showed that the addition of cumaric acid and caffeic acid provided moderate degree of photostabilization of the en-yn-dicycloethers and that addition of ferulic acid provided the best photostabilization among the UV absorbers studied. Photostabilization effect appears to be due to a competitive energy absorption of UV photons by the absorber molecules.
author	LUCERO,A REBOLLEDO,C BUONO-CORE,G.E
author_facet	LUCERO,A REBOLLEDO,C BUONO-CORE,G.E
author_sort	LUCERO,A
title	EFFECT OF SOME NATURAL UV-ABSORBERS ON THE PHOTOSTABILIZATION OF ACTIVE INGREDIENTS IN GERMAN CHAMOMILLE FLORAL EXTRACTS: PART I
title_short	EFFECT OF SOME NATURAL UV-ABSORBERS ON THE PHOTOSTABILIZATION OF ACTIVE INGREDIENTS IN GERMAN CHAMOMILLE FLORAL EXTRACTS: PART I
title_full	EFFECT OF SOME NATURAL UV-ABSORBERS ON THE PHOTOSTABILIZATION OF ACTIVE INGREDIENTS IN GERMAN CHAMOMILLE FLORAL EXTRACTS: PART I
title_fullStr	EFFECT OF SOME NATURAL UV-ABSORBERS ON THE PHOTOSTABILIZATION OF ACTIVE INGREDIENTS IN GERMAN CHAMOMILLE FLORAL EXTRACTS: PART I
title_full_unstemmed	EFFECT OF SOME NATURAL UV-ABSORBERS ON THE PHOTOSTABILIZATION OF ACTIVE INGREDIENTS IN GERMAN CHAMOMILLE FLORAL EXTRACTS: PART I
title_sort	effect of some natural uv-absorbers on the photostabilization of active ingredients in german chamomille floral extracts: part i
publisher	Sociedad Chilena de Química
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000300024
work_keys_str_mv	AT luceroa effectofsomenaturaluvabsorbersonthephotostabilizationofactiveingredientsingermanchamomillefloralextractsparti AT rebolledoc effectofsomenaturaluvabsorbersonthephotostabilizationofactiveingredientsingermanchamomillefloralextractsparti AT buonocorege effectofsomenaturaluvabsorbersonthephotostabilizationofactiveingredientsingermanchamomillefloralextractsparti
_version_	1718445471889883136

EFFECT OF SOME NATURAL UV-ABSORBERS ON THE PHOTOSTABILIZATION OF ACTIVE INGREDIENTS IN GERMAN CHAMOMILLE FLORAL EXTRACTS: PART I

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