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Tag: "daytime" at biology news

Robot-based system developed at Carnegie Mellon detects life in Chile's Atacama desert

...ble to capture a strong fluorescence signal during daytime exploration," said Shmuel Weinstein, project manager. During the mission, a remote science team located in Pittsburgh instructed the rover's operations. A ground truth team at the site collected samples studied by the rover to bring back for further...

Brain-mapping technique aids understanding of sleep, wakefulness

... people uncontrollably fall asleep, have excessive daytime sleepiness and experience sudden muscle weakness called cataplexy. Because orexin-producing neurons play such a key role in regulating sleep, determining how they are connected to other neurons in the brain is an important step toward understanding ...

New Research Shows Artificial Light at Night Stimulates Breast Cancer Growth in Laboratory Mice

...wth comparable to that seen with administration of daytime blood samples, when tumor activity is particularly high,?Blask said. According to the researchers, melatonin exerts a strong influence on the body’s circadian rhythm, an internal biological clock that regulates sleep ?wake cycle, body temperature, e...

New fruit fly protein illuminates circadian response to light

...ght, the animal associates the absence of TIM with daytime hours," explains Sehgal. The mutated JET protein reduces the light-dependent degradation of TIM and the circadian response to light. Sehgal and others were able to reverse the behaviors in the jetlag flies by genetically replacing the mutated gene s...

Food-crop yields in future greenhouse-gas conditions lower than expected

...ater than the current 380 parts per million, while daytime ozone levels during the growing season could peak on average at 80 parts per billion (now 60 parts per billion). Older studies, as reviewed by the Intergovernmental Panel on Climate Change, suggest that increased soil temperature and decreased soil ...

UCI scientists find chlorine may contribute to ozone formation

...he Irvine area over a two-month period showed that daytime chlorine gas levels typically measured five parts ...d as high as 15 parts per trillion. Observation of daytime chlorine is surprising because chlorine molecules break apart just minutes after entering the atmosp...

Negative effects of caffeine are stronger on daytime sleep than on nocturnal sleep

...ep are way stronger when taken at night prior to a daytime recovery sleep episode than in the evening before a nocturnal sleep episode." "Caffeine makes daytime sleep episodes too shallow to override the signal from the biological clock that tells the body it s...

Scientists map air pollution using corn grown in US fields

...nts provide a cost-effective way to record average daytime conditions over several months. Plants take in carbon dioxide gas, from both background and fossil fuel sources, during photosynthesis, and it becomes part of the plant tissue. In summer 2004, UCI scientists collected corn from farms and gard...

Sleep disturbances affect classroom performance

...requencies in adolescents and significantly affect daytime performance, as measured by GPA," said Pagel. Both restless legs and difficulty concentrating during the day are symptoms associated with the diagnosis of Attention Deficit Hyperactivity Disorder (ADHD), a diagnosis that can be associated with p...

Tracking sperm whales and jumbo squid

...sionally dive beyond 500 meters, especially during daytime when the squid were deep, and we assume these also represent foraging dives." Night and day During the day, whales and squid spent about 75 percent of the time at depths ranging from 600 to 1,300 feet, which is "consistent with the idea that ...

Longer treatment benefits sleep apnea patients

...ion of CPAP use needed to gain maximum benefit for daytime alertness and functioning. Researchers at seven ...ch night. In addition, patients were evaluated for daytime symptoms such as excessive daytime sleepiness using two widely accepted assessment tools, and for da...

Prenatal Stress Keeps Infants, Toddlers up at Night, Study Says

...detailing how long the child slept (a consolidated daytime and nighttime total), how often the child awoke, and if he or she exhibited any of seven common forms of sleep problems, such as having nightmares, refusing to go to bed or having trouble falling asleep. Surprisingly, babies born to mothers classi...

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