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Irena Beck
Researcher at L'Oréal
Publications - 12
Citations - 353
Irena Beck is an academic researcher from L'Oréal. The author has contributed to research in topics: Quenching (fluorescence) & Isomerization. The author has an hindex of 6, co-authored 12 publications receiving 341 citations.
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Antioxidant activity of flavonoids: Efficiency of singlet oxygen (1Δg) quenching
Cécile Tournaire,Sylvie Croux,Marie-Thérèse Maurette,Irena Beck,Michel Hocquaux,André M. Braun,André M. Braun,Esther Oliveros,Esther Oliveros +8 more
TL;DR: The results of a systematic study of the reactivity of 13 selected flavonoids (from the flavonol, flavone, flavanone and flavane families) with singlet oxygen (1O2(1 delta g)) in order to establish a structure-activity relationship were reported in this paper.
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Activité anti-oxydante de flavonoïdes : réactivité avec le superoxyde de potassium en phase hétérogène
TL;DR: In this paper, a mechanism for the reaction of flavonols by potassium superoxide (KO2) in heterogeneous aprotic media yields acids and aldehydes by opening of ring C, if the latter contains an ethylenic double bond substituted by an OH group.
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Study of the photochemical behaviour of sunscreens – benzylidene camphor and derivatives
TL;DR: Benzylidene camphor derivatives have been currently used as ultraviolet filters in sunscreen compositions and when solutions are exposed to the light from a solar simulator, a photoinduced cis‐trans isomerization is observed.
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N,N'-Bis-Dibenzyl Ethylenediaminediacetic Acid (Dbed): a Site-Specific Hydroxyl Radical Scavenger Acting as an “Oxidative Stress Activatable” Iron Chelator In Vitro
TL;DR: The results suggest that the iron chelate of DBED undergoes an intramolecular aromatic hydroxylation by HO, leading to 2-OH derivatives and hence that DBED is a site-specific HO scavenger.
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N,N'-bis-(3,4,5-trimethoxybenzyl) ethylenediamine N,N'-diacetic acid as a new iron chelator with potential medicinal applications against oxidative stress.
Jean-Baptiste Galey,Jacqueline Dumats,Sylvie Genard,Odile Destree,Patrick Pichaud,Philippe Cctroux,Laurent Marrot,Irena Beck,Bona Fernandez,Gilles Barre,Michel Seité,Georges Hussler,Michel Hocquaux +12 more
TL;DR: The protective effect of OR10141 in vitro against DNA single strand breaks, protein damage, and lipid peroxidation induced by Fenton chemistry suggests that this compound is able to compete for iron with biological molecules and, thus, that this strategy of protection against oxidative stress is feasible.