light exposure

light exposure

[′līt ik‚spō·zhər]
(optics)
A measure of the total amount of light falling on a surface; equal to the integral over time of the luminance of the surface. Also known as exposure.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
It should be noted that, in order to better model human light exposure, the rats used in this study were diurnal, meaning awake during the day and asleep at night, rather than the typical nocturnal laboratory rats which are awake during nighttime hours.
He said animal studies back the theory that light exposure at night may lead to weight gain by directly affecting signals from the sleep-inducing LAND OF Peaceful hormone melatonin and circadian rhythms, the body clock.
As part of the study, the researchers enlisted 36 healthy adults age 18 to 39 to stay for two weeks in a laboratory, where their food intake, light exposure and sleep were monitored.
Among the updates is the promise of PDT delivered by means of an ultrashort incubation time of 10-20 minutes, followed by prolonged blue light exposure time of 1 hour.
Summary: TEHRAN (FNA)- Scientists have succeeded in developing a chemical process to convert visible light into infrared energy, allowing innocuous radiation to penetrate living tissue and other materials without the damage caused by high-intensity light exposure.
Schreiner MediPharm, a Germany-based provider of specialty pharmaceutical labeling solutions, has introduced labels designed to protect liquid medicines in transparent glass containers from damaging UV and light exposure. The new portfolio includes three protective labels at various safety levels designed to safeguard against UV and light, while also ensuring the liquid inside is in its intended, original condition.
Participants who mounted device on themselves recorded multiple forms of light exposure during outdoor activities, even in the water.
Researchers were able to determine how much sunlight the babies had been exposed to thanks to dosimeters wearable devices designed to record individual direct UV light exposure which were worn by some of the babies across both groups.
Ultraviolet light exposure from either the sun or tanning beds was linked to a whopping 96% of skin cancers in men and 94% in women.
Although studies show that exposure to blue light inhibits melatonin secretion, which disrupts sleep and can affect quality of life, physical and mental health and susceptibility to illness, local experts confirmed the impact depends on the intensity and duration of light exposure.
Scientists tested the association between melatonin suppression body clock disruption in participants who received either continuous or intermittent bright light exposure at night.