Photoacclimatory responses of the seagrass Zostera marina in the intertidal and subtidal zones were investigated by measuring chlorophyll a fluorescence parameters, photosynthetic pigments, leaf δ13C values, and shoot morphology in two bay systems. Intertidal plants had higher carotenoid concentrations than subtidal plants to avoid photodamage under excess light conditions during the day. The m...

Our earlier studies have demonstrated that exposure of Caucasoid skin to longwave uv light after the application of psoralens resulted in an increase in the average size of the melanosomes and changes in the distribution pattern of melanosomes within the keratinocytes. The photobiologic mechanism responsible for the changes in the size of melanosomes is still not clear. However, the action spec...

Abstract Optical imaging has the potential to reveal high-resolution information with minimal photodamage. The recent renaissance of super-resolution, widefield, ultrafast, and computational methods broadened its horizons even further. However, a remaining grand challenge is at depth over widefield high spatiotemporal resolution. This achievement would enable observation fast collective biologi...

Proteins exposed to UV radiation are subject to irreversible photodamage through covalent modification of tryptophans (Trps) and other UV-absorbing amino acids. Crystallins, the major protein components of the vertebrate eye lens that maintain lens transparency, are exposed to ambient UV radiation throughout life. The duplicated beta-sheet Greek key domains of beta- and gamma-crystallins in hum...