A mobile spectrometer cart was used to measure eye-level light exposures in 9 daylit and 4 non-daylit spaces.
Rapid light curve measurements in the presence of actinic illuminations (Schreiber et al. 1997) were obtained through the application of a series of 10-s light exposures with increasing irradiance from 1 to 1585 µmol photons m−2 s−1.
The mixtures were photo-activated by using an LED lamp excitation at 680 nm (10 mW cm−2), and the generation of 1O2 was measured by recording the fluctuation of ABDA fluorescence intensity after different amount of light exposures.
The cytotoxic effects of these low intensity light exposures on human cancer and normal cell lines were quantitatively determined by Lactate dehydrogenase (LDH) cytotoxic activity and PrestoBlueTM cell viability assays.
This study is a first step in addressing the need to measure and evaluate light exposures in biologically-meaningful units to better support the care of people living with dementia in long-term care facilities.
The LEDs-based exposure system was designed and constructed to irradiate the selected cancer and normal cells and evaluate the biological effects induced by light exposures in visible and infrared light range.
Procedures using annual, climate-based daylight modeling of eye-level light exposures are developed to analyze and map indoor environments in regard to spatial and seasonal changes in the availability of a circadian-effective daylight stimulus.
The results from this investigation have allowed establishing exhibition recommendations taking into consideration the sensitivity of each object, light levels in the museum building, and estimated light exposures based on the duration of the exhibit.
Propidium monoazide (PMA) treatment coupled with long-amplicon qPCR assays were assessed for their ability to quantify infectious MS2 in pure cultures and following inactivation by a range of UV light exposures and chlorine doses.
Papadakis classifies his artworks as a type of heliography, which a refers to a photographic process invented in the early 19th century that involved using hardened natural asphalt to capture different light exposures.
No significant differences between blue and green light exposures, and between violet and green light exposures were detected during task periods (Supplemental Tables S2).
