Concept
Photoprotection
Publications associées (13)
Identifying the mediators of intracellular E. coli inactivation under UVA light: The (photo) Fenton process and singlet oxygen
César Pulgarin, Stefanos Giannakis
Solar disinfection (SODIS) was probed for its underlying mechanism. When Escherichia coli was exposed to UVA irradiation, the dominant solar fraction acting in SODIS process, cells exhibited a shoulder before death ensued. This profile resembles cell killi ...
PERGAMON-ELSEVIER SCIENCE LTD2022Common reef-building coral in the Northern Red Sea resistant to elevated temperature and acidification
Anders Meibom, Stéphane Laurent Escrig, Thomas Krüger, Maoz Fine, Julia Marie Jeanne Yvonne Bodin, Maria-Evangelia Giovani
Coral reefs are currently experiencing substantial ecological impoverishment as a result of anthropogenic stressors, and the majority of reefs are facing immediate risk. Increasing ocean surface temperatures induce frequent coral mass bleaching events—the ...
Royal Soc2017Kleptoplasty in a shallow water benthic foraminifer, Haynesina germanica
Anders Meibom, Charlotte Madeleine Nicole Lekieffre, Emmanuelle Geslin
Some benthic foraminifera have the ability to incorporate functional chloroplasts from diatoms (kleptoplasty). Our objective was to investigate kleptoplast cellular organisation, functionality (O2 flux, C and N incorporation), pigment composition and photo ...
2016A Pyridine-Based Ligand with Two Hydrazine Functions for Lanthanide Chelation: Remarkable Kinetic Inertness for a Linear, Bishydrated Complex
To study the influence of hydrazine functions in the ligand skeleton, we designed the heptadentate HYD ligand (2,2',2 '',2 ''-(2,2'-(pyridine-2,6-diyl)bis(2-methylhydrazine-2,1,1-triyl)) tetraacetic acid) and compared the thermodynamic, kinetic, and relaxa ...
American Chemical Society2015Determinants of disinfectant pretreatment efficacy for nitrosamine control in chloraminated drinking water
Utilities using chloramines need strategies to mitigate nitrosamine formation to meet potential future nitrosamine regulations. The ability to reduce NDMA formation under typical post-chloramination conditions of pretreatment with ultraviolet light from a ...
Elsevier20152D Fourier Transform Spectroscopy Setup and Ultrafast Dynamics of Porphyrins
The first section of the thesis discusses the development and implementation of a two dimensional Fourier transform spectroscopy setup, that permits the recording of electronic 2D spectra in the visible regime. A hollow core fiber was used to generate broa ...
EPFL2015Generalized receptor law governs phototaxis in the phytoplankton Euglena gracilis
Andrea Rinaldo, Andrea Giometto, Amos Maritan, Florian Altermatt
Phototaxis, the process through which motile organisms direct their swimming toward or away from light, is implicated in key ecological phenomena (including algal blooms and diel vertical migration) that shape the distribution, diversity, and productivity ...
Natl Acad Sciences2015Dynamics of UV-excited, protonated peptides in the gas phase
The scope of this thesis is the electronically excited state dynamics of protonated peptides and their photofragmentation mechanism. UV radiation induces fragmentation of biological molecules and might cause various diseases, such as cataracts or skin canc ...
EPFL2014Desymmetrizations of meso-tert-norbornenols by rhodium(I)-catalyzed enantioselective retro-allylations
Rhodium-catalyzed desymmetrizations of meso-tert-norbornenols, e.g. I, by retro-allylations generate allyl-rhodium species that allow for a rich and diverse downstream reactivity. ...
Royal Society of Chemistry2011Regulation of DHICA-mediated antioxidation by dopachrome tautomerase: Implication for skin photoprotection against UVA radiation
Dopachrome tautomerase (Dct) is a critical enzyme in the melanogenesis pathway that isomerizes the intermediate dopachrome to 5,6-dihydroxyindole-2-carboxylic acid (DHICA) and influences the proportion of DHICA monomer incorporated into the 5,6-dihydroxyin ...
Elsevier2010