Tag: "darkness" at medical news

Mood lighting: Penn researchers determine role of serotonin in modulating circadian rhythm

...sensitivity to light and that exposure to constant darkness leads to a decrease in serotonin levels in the bra...tion of serotonin levels in flies kept in constant darkness may provide scientists with insight into the etiology and treatment of SAD, a mood disorder related ...

South Polar ozone hole makes big comeback

...y low temperatures, and in the cold and continuous darkness of this season, polar stratospheric clouds are formed that contain chlorine. The stratospheric ozone layer that protects life on Earth from harmful ultraviolet (UV) radiation is vulnerable to the presence of certain chemicals in the atmosphere such ...

Artificial light at night stimulates breast cancer growth in laboratory mice

...udy also showed that extended periods of nighttime darkness greatly slowed the growth of these tumors. The stu...-rich blood collected from subjects while in total darkness severely slowed the growth of the tumors. "These results are due to a direct effect of the melatonin...

Not so different after all: Mysterious eye cells adapt to light

...igger responses when the cells had been sitting in darkness than when they were exposed to bright background light. These adjustments persisted when ipRGC synapses were chemically blocked, indicating that the changes in sensitivity were indeed happening within these cells....

Darkness more than triples EMS helicopter crash fatality risk

Post-crash fires, darkness or bad weather greatly decrease the likelihood of ... Injury Research and Policy. "Our study found that darkness more than triples the risk of fatalities when EMS helicopters crash and that bad weather increases t...

New fruit fly protein illuminates circadian response to light

...ss, constant light, and equal periods of light and darkness (a light-dark cycle). During exposure to constant ...oral differences during their exposure to constant darkness and the light-dark cycle. However, when the fruit flies were shifted from one light-dark cycle to an...

New studies in the journal Sleep focus on helping children, women sleep better

...ained on a light-dark (LD) schedule or in constant darkness (DD) for three to four weeks, and treated with DSP-4, a neurotoxic agent specific for noradrenergic-LC projections. Vigilance states were analyzed before and three weeks after LC lesion. The DSP-4 lesion was verified by immunohistochemistry of nora...

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(Date:7/24/2014)... 45% on average over a 35 year period in ... the impact of humans on declining animal numbers. This ... as insects, spiders, crustaceans, slugs and worms bring to ... crops, decomposition for nutrient cycling, water filtration and human ... and led by UCL, Stanford and UCSB, focused on ...
(Date:7/24/2014)... study has identified two factors that characterize sustainable ... production of highly qualified physics teachers. Specifically, one ... physics teacher education in combination with institutional motivation ... viable. Science, Technology, Engineering and Math (STEM) teacher ... study points the way for institutions seeking to ...
(Date:7/24/2014)... current biodiversity, the product of 3.5 billion years of ... history of life. But it may be reaching a ... literature and analysis of data published in Science ... loss and decline of animals is contributing to what ... sixth mass biological extinction event. , Since 1500, more ...
Breaking Biology News(10 mins):Invertebrate numbers nearly halve as human population doubles 2Invertebrate numbers nearly halve as human population doubles 3Creating sustainable STEM teacher preparation programs 2Stanford biologist warns of early stages of Earth's 6th mass extinction event 2Stanford biologist warns of early stages of Earth's 6th mass extinction event 3
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