Auswahl der wissenschaftlichen Literatur zum Thema „Crèmes solaires“
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Zeitschriftenartikel zum Thema "Crèmes solaires"
Kiefer, Bertrand. „Le mythe des crèmes solaires“. Revue Médicale Suisse 14, Nr. 607 (2018): 1056. http://dx.doi.org/10.53738/revmed.2018.14.607.1056.
Der volle Inhalt der QuelleZghal, M., A. Bhouri, A. E. Jellouli, S. Triki und B. Fazaa. „Sommes-nous protégés par les crèmes solaires ?“ Annales de Dermatologie et de Vénéréologie 140, Nr. 12 (Dezember 2013): S502—S503. http://dx.doi.org/10.1016/j.annder.2013.09.320.
Der volle Inhalt der QuelleDoré, Élisa. „La crème solaire nuit aux coraux“. Pour la Science N° 537 – juillet, Nr. 7 (08.07.2022): 15a. http://dx.doi.org/10.3917/pls.537.0015a.
Der volle Inhalt der QuelleMbanga, L. „Antioxidant Properties of Some Plants Extracts Used As Natural Sunscreen in the Formulated Cream“. Revue Congolaise des Sciences & Technologies 02, Nr. 01 (28.02.2023): 185–90. http://dx.doi.org/10.59228/rcst.023.v2.i1.23.
Der volle Inhalt der QuelleBadaoui, A. „Eczéma de contact à l’aluminium contenu dans une crème solaire « bio »“. Revue Française d'Allergologie 64 (April 2024): 103866. http://dx.doi.org/10.1016/j.reval.2024.103866.
Der volle Inhalt der QuelleMariko, Aichata B. A., Mahamane Haidara, Rasmané Semdé und Rokia Sanogo. „Caractéristiques physicochimiques, constituants chimiques et anti radicalaires de 10 plantes médicinales pour la préparation d’une crème de protection de personnes atteintes d’albinisme“. Journal Africain de Technologie Pharmaceutique et Biopharmacie (JATPB) 2, Nr. 3 (20.12.2023). http://dx.doi.org/10.57220/jatpb.v2i3.149.
Der volle Inhalt der QuelleDissertationen zum Thema "Crèmes solaires"
Catalano, Riccardo. „Evaluer et anticiper les risques associés aux UV filtres nanoparticulaires employés dans les crèmes solaires : une étude orientée vers le cycle de vie“. Thesis, Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0140.
Der volle Inhalt der QuelleSunscreens are increasingly questioning their potential environmental impact, because the specific ingredients they contain, such as UV filters, surfactants, thickeners, can reach rivers, lakes, sea shore, and/or sewage treatment plants when the product is removed from the skin during bathing or daily cleansing. Nanomaterials (NMs) used in sunscreen formulation as UV filters may impact these systems. Knowledge gaps remain regarding the safety of these NMs, as few studies have been conducted on actual UV filters or on the life cycle of sunscreens to date. This thesis work aimed to contribute to filling these gaps by focusing on several key stages of the sunscreen life cycle: the characterization of nano-TiO2 UV filters and the optimization of their concentration in the product, the exposure and marine ecotoxicity to these mineral UV filters; with the aim of proposing some new strategies to anticipate and minimize these risks through an eco-design approach
Cotinat, Pauline. „Étude de la capacité de réponse au stress à l'échelle cellulaire du Cnidaire symbiotique Anemonia viridis“. Electronic Thesis or Diss., Université Côte d'Azur, 2023. http://www.theses.fr/2023COAZ6003.
Der volle Inhalt der QuelleThe objective of this thesis was to characterize the response of the cells of a symbiotic Cnidaria, the sea anemone, Anemonia viridis, to extrinsic stresses related to the anthropic pressure of coastal areas, and intrinsic stresses related to the constraints of living in symbiosis. Indeed, the evolutionary success of symbiosis in Cnidaria is based on the photosynthetic activity of the symbiont (a microalga of the Symbiodiniaceae family), which also presents constraints, such as a daily exposure of the animal tissue to pro-oxidant conditions due to the production of O2 during photosynthesis.We were first interested in the response capacity of cultured A. viridis cells to a stress related to pollution by solar products. An innovative in vitro marine ecotoxicology assay based on the monitoring of cell parameters, such as viability and growth, allowed us to evaluate the ecotoxicity of several types of sunscreen products, namely: 1) raw materials, namely the UV filters Avobenzone and Benzophenone-3, with EC50 values in agreement with the literature; 2) formulation blocks and 3) finished products with a wide range of responses, validating the sensitivity of this approach to assess the toxicity of sunscreen products on the coastal marine ecosystem. Thanks to this test and by combining a preventive strategy of eco-design within the company SO.F.I.A Cosmétiques, we participated in the formulation of a range of more eco-responsible sunscreen products.Subsequently, we analyzed the ability of A. viridis to respond to pro-oxidant conditions by in vivo and in vitro approaches. Whole specimens and cell cultures were subjected to 200 and 500μM H2O2 for 7 days, and then we measured global health parameters (symbiotic status, cell viability and growth) and stress biomarkers (antioxidant capacity, protein damage). At the whole organism level, both H2O2 concentrations did not affect survival and no bleaching was observed. Only the symbiont compartment exhibited oxidative protein damage after a 7-day exposure to 500μM H2O2, despite an increase in overall antioxidant capacity. The in vitro approach showed a high intrinsic capacity of animal cells to cope with pro-oxidative conditions, although we observed differences in tolerance: 200μM H2O2 induced only a decrease in cell growth with complete resilience, whereas 500μM H2O2 induced a stress state characterized by a decrease in cell viability, a drastic arrest of cell growth after 7 days of treatment, and partial resilience.Finally, we observed an absence of irreversible senescence phenotype (lysosomal ß-galactosidase activity) in cultured A. viridis cells following continuous (from 24 hours to 28 days) or repeated H2O2 treatments, as well as following resilience periods of several weeks. Similarly, an ionizing treatment up to 50 Gy did not induce senescence.During this work, we validated the use of a symbiotic Cnidaria cell culture as an experimental biological model to address fundamental and applied issues. This work paved the way for i) the development of an entrepreneurial project based on the commercialization of the in vitro marine ecotoxicity assay and ii) the characterization of molecular and cellular mechanisms related to the stress resistance capacity of symbiotic Cnidaria. These future investigations at the cellular scale will be major assets for the understanding of the longevity processes of Cnidaria
Ignasiak, Marta. „Study of the mechanism of radiation- and photo-induced oxidation of methionine containing peptides“. Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112098/document.
Der volle Inhalt der QuelleSeveral factors (radiation, metabolism, pollutants) lead to the generation of oxidizing free radicals in living organisms that damage all biomolecules and especially proteins. One of the protein targets is Methionine (Met). Its oxidation causes highly damaging effects, such as Alzheimer’s or prion disease. The aim of this work was to investigate the transient species and the stable products formed after radiolytic and photolytic oxidation of Met-containing peptides. The reaction of hydroxyl radicals (•OH) and 3-carboxybenzophenone triplet state with Met-residue in peptides was investigated for model compounds (Met-dipeptides) and for longer peptides (e.g. Bradykinin). Laser flash photolysis and pulse radiolysis were used to characterize short-lived transient species, while gamma radiolysis and steady-state photolysis were used for quantitative and qualitative characterization of stable products. The structural modifications induced by oxidation have been characterized by the HPLC coupled with mass spectrometry and Infrared Multi Photon Dissociation Spectroscopy (IRMPD, CLIO Free electron laser). The oxidation of investigated Met-containing compounds by •OH or 3CB* led to the formation of S-centered radical cation >S•+ on Met-residue, that were further stabilized by formation of two-centered three-electron bond (S∴Y)+ or underwent the deprotonation reaction yielding the α-(alkylthio)alkyl radicals (α-S). The oxidation of Met-containing dipeptides by •OH radicals yielded the formation of Met sulfoxide (MetSO) as a main product. Undoubtedly, the identification and characterization of MetSO in deoxygenated solutions containing catalase was a milestone in investigation of stable products. However, in some cases, other products were identified. The stable products of photolysis were adducts with 3-carboxybenzophenone moiety, resulting from radical recombination reaction. Another identified product formed during photolysis was 3CB-3CB benzpinacol photoadduct, which has similar structure to the product of BP irradiations. Identified products (MetSO and the photo-adduct) were formed from the α-S via disproportionation or reaction with 3CBH•/3CBH•⁻. The oxidation of Met-Lys-Bradykinin (MKBR) yielded formation of similar photo-adducts via sensitized reaction with the 3CB*. The •OH induced oxidation of MKBR yielded several products, e.g. the sulfoxide and hydroxylated phenylalanine. In addition, other derivatives of benzophenone (oxybenzone (OXB) and sulisobenzone (SB)) were investigated due. They are widely used in commercial sun-protecting products dp to their unique photophysical properties. However the application of sunscreens awakes controversies because some epidemiological studies indicated an increased risk of malignant melanoma for their users. Photo-instability of sunscreen filters would result in reduced protection and may produce reactive free radicals or mutagens. In addition, the reactions of the sunscreens with oxygen free radicals e.g. hydroxyl radicals are likely to arise and they were not yet sufficiently documented. Finally, the radiolytic and photolytic properties of SB and OXB were investigated using femto-and nanosecond laser flash photolysis. Pulse radiolysis studies of the oxidation of those molecules by •OH radicals were performed. The results obtained for SB and OXB were compared to several other benzophenone derivatives. The results shown the formation of excited singlet state that was deactivated efficiently via the Excited State Intramolecular Proton Transfer (ESIPT). In case of polar solvent, the formation of trace amounts phenoxyl radicals was identified, while for nonpolar media those radicals were not observed. The reactivity of UV-excited sun filters towards simple derivatives of Met was also investigated, however, this topic requires further and more detailed investigations
Bücher zum Thema "Crèmes solaires"
Henshaw, John M. Le théorème de la fourmi géante : Crème solaire, vitesse de la lumière et arnaques financières: Les équations sont partout. Belin, 2016.
Den vollen Inhalt der Quelle findenBuchteile zum Thema "Crèmes solaires"
Bährle-Rapp, Marina. „crème solaire“. In Springer Lexikon Kosmetik und Körperpflege, 133. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_2525.
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