They considered factors such as diet, patterns of light exposure, even the antibiotics they used.
Ultraviolet-light exposure potentially causes melanoma and contributes to the development of cataracts.
This activity remained significantly lower throughout the 48-minute light exposure.
While most researchers agree that light exposure and melatonin can help reduce the symptoms of jet lag after arriving at your destination, not everyone thinks it makes sense to switch sleep schedules before a trip, which can cut into social time with family and friends.
"The good news is that people who stay up late in front of the television and computer may be able to undo some of the harmful effects just by going back to a regular light-dark cycle and minimizing their exposure to artificial light at night, " Bedrosian says.
Light therapy (such as from exposure to the sun or another bright light) may also help get you back on track.
He left it on a fixed aperture, so that as the light faded, the exposure got ever longer.
Exposure to light increases the levels of dopamine in the eye and this seems to prevent elongation of the eyeball.
While researchers are continuously debating and fine-tuning their advice, they agree that exposure to light is one of the most effective ways to combat jet lag.
Exposure to light changes the shape of the phytochrome, which allows it to turn a gene on, so the gene will produce its particular protein.
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The prisoners had no exposure to natural light, making it impossible for them to tell if it was night or day.
Compared with darkness, exposure to red light boosted alertness: The EEGs showed a significant reduction in brain-wave activity associated with sleepiness after five minutes.
The result is expressive background defocusing and sophisticated bokeh, plus the flexibility to use short, blur-free exposure times in low light.
Nantucket red, for example, has the look of a red shirt that has been washed countless times and is faded to a light peachy pink from years of sun exposure, he says.
Vitamin D is a fat soluble vitamin that is mainly produced by exposure of the skin to ultraviolet light.
In our tests, exposure was spot on and low-light performance was spectacular -- white balance, despite being usually accurate, was sometimes off when snapping photos in artificial light (like under fluorescents).
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Light entering through a lens is focused through an aperture and exposure is controlled by a shutter.
In low-light, HDR Backlight Adjustment takes a collage of images at various exposure levels and blends them into one perfectly exposed photo.
Since aperture plays a part in exposure, it's important to understand "stops of light, " a measurement of the amount of light entering the camera.
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Their production is triggered by things besides light and nutrient deficiencies: drought, low temperatures, wounding, infection and exposure to ozone are all known to stimulate synthesis of these molecules.
So even if our exposure time is indeed nearly a trillionth of a second, to get sufficient light we must take an average.
Stops of light at first seems confusing and not as important to those who don't understand exposure, but if you ever plan to become a master at photography, learning the terminology is key.
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Symptoms typically develop within three to seven days of exposure and can include stiff neck, fever, headache, nausea, vomiting, increased sensitivity to light and an altered mental state, often confusion.
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