Issue 12, 2006

Light absorbed by a carotenoid initiates energy and electron transfer to an attached fullerene, converting photons to chemical potential energy.
DOI: 10.1039/b613971j

Issue 11, 2006

3-Hydroxyquinolone dyes exhibit two emission bands due to excited state intramolecular proton transfer. The ratio of the two bands is sensitive to the polarity and basicity of the dye environment.

Issue 10, 2006

The photochemistry and photophysics of all-trans-1,4-diindanylidenyl-2-butene, a rigid analogue of all-trans-1,6-diphenyl-1,3,5-hexatriene
DOI: 10.1039/B608065K

Issue 9, 2006

Scanning electron micrograph by Shunzo Kondo showing the cell surface of ciliated protozoan Tetrahymena thermophila with its anterior end and oral apparatus at the top.

Issue 8, 2006

Photographic representation of chlorophyll fluorescence in leaves. Insets: (1) overlap between absorption and emission spectra leading to fluorescence re-absorption, (2) illustration of both the spectral distribution of fluorescence recorded experimentally and that obtained after correction by re-absorption processes through physical models.

Issue 7, 2006

Water content in the solvent controls the sites of formal excited state intramolecular proton transfer (ESIPT) for the compound shown, from oxygen to carbon and from oxygen to pyridine nitrogen.

Issue 6, 2006

Asymmetric double-well potential that illustrates the energetics of proton (H⁺) transfer from a donor molecule (D) to an acceptor (A). The height of the transition state (D···H⁺···A) determines the rate of proton transfer. As an example, proton transfer from the retinal Schiff base of bacteriorhodopsin (donor) to the terminal carboxylate of Asp-85 (acceptor) via an intervening water molecule (red sphere) is depicted on the top.

Issue 5, 2006

Production of reactive oxygen species in the thylakoid membrane.

Issue 4, 2006

Radical ions of tetraphenylporphycene could be important reactive intermediate species in photoinduced electron transfer processes, e.g. in photodynamic therapy.

Issue 3, 2006

A sandwich of a microplate containing skin cells (bottom) and a quartz microplate filled with sunscreen solutions (top) for screening of sunscreens for their cellular protection properties in vitro.

Issue 2, 2006

Intrinsic and extrinsic skin ageing in the same individual. Intrinsically aged skin is pale and smooth with fine wrinkles. In contrast, photoaged skin exhibits fine and deep wrinkles, is rough and may be hyperpigmented.

Issue 1, 2006

Laguna Los Juncos, a shallow freshwater lake in Patagonia, Argentina; the habitat of the copepod Boeckella antiqua