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Night in Biological News

Immunity stronger at night than during day

The immune system's battle against invading bacteria reaches its peak activity at night and is lowest during the day. Experiments with the laboratory model organism, Drosophila melanogaster, reveal that the specific immune response known as phagocytosis oscillates with the body's circadian rhy...

Birds migrate together at night in dispersed flocks, new study indicates

A new analysis indicates that birds don't fly alone when migrating at night. Some birds, at least, keep together on their migratory journeys, flying in tandem even when they are 200 meters or more apart. The study, from researchers at the University of Illinois and the Illinois Natural History ...

How corals adapt to day and night

Researchers have uncovered a gene in corals that responds to day/night cycles, which provides some tantalizing clues into how symbiotic corals work together with their plankton partners. Corals are fascinating animals that form the largest biological constructions in the world, sprawling coral...

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

Results from a new study in laboratory mice show that nighttime exposure to artificial light stimulated the growth of human breast tumors by suppressing the levels of a key hormone called melatonin. The study also showed that extended periods of nighttime darkness greatly slowed the growth of these...

URI researcher sheds light on 'man-eating' squid; finds them timid, nonthreatening

...here was still some doubt in my mind, so I was a little nervous getting into the water with them for the first time," Seibel said. Scuba diving at night in the surface waters of the Gulf of California in 2007, Seibel scanned the depths with his flashlight and saw the shadows of Humboldt squid far in th...

URI researcher sheds light on 'man-eating' squid; finds them timid, non-threatening

...here was still some doubt in my mind, so I was a little nervous getting into the water with them for the first time," Seibel said. Scuba diving at night in the surface waters of the Gulf of California in 2007, Seibel scanned the depths with his flashlight and saw the shadows of Humboldt squid far in th...

All in sight

...r the first time during the current expedition of RV Polarstern. The underlying measurement method, infrared thermography, registers both at day and night the heat radiation originating from each body. It depicts it on a computer screen as a black and white picture, thus making it visible for humans: the...

Gene predicts how brain responds to fatigue, human study shows

...me crashing out and others holding up well after a night without sleep," said Michael Chee, MBBS, at the Du...esearchers imaged each participant four times: the night before and the morning after a good night's sleep, and the night before and morning after a sleepless night. The...

GARP makes the difference

... published in the current issue of the scientific journal Journal of Cellular and Molecular Medicine . The immune system keeps us healthy: day and night it protects us against invading and harmful pathogens. But this fulltime surveillance can also turn into a problem, for example after an organ transpl...

Flexible solar strips light up campus bus shelter

.... Each light fixture uses only 600 milliwatts of power and produces about the same light output as a three watt regular tungsten bulb or what a small night light would use. The lights are bright enough for easy reading. The solar cells capture sunlight during the day and convert it to electricity to r...

MicroRNAs grease the cell's circadian clockwork

...eam, published in the 1st June edition of Genes & Development , fills in this important gap. Living beings have adapted to the alternation between night and day by developing an internal clock, located in the brain. It allows synchronising gene expression and physiological functions with geophysical ti...

Sweden to host 1.3 billion Euro research center

...world's most powerful neutron source should be built in Lund, Sweden, it has been announced by EU Research Ministers. At a meeting in Brussels last night (28 May), seven countries voted in support of Lund's bid to host the European Spallation Source (ESS), with a further two voting with the majority. ...

Demonstration Features Commercial Technology for Combating Terrorism

...lay and denial technology; explosives detection systems; explosive ordnance disposal equipment; fence sensor systems; individual protective equipment; night vision and optics devices; non-lethal weapons and technology; physical security equipment sensor and surveillance systems; robotic vehicles and system...

Healing wounds with lasers, vehicles that drive themselves, other cutting-edge optics

...ussed in Forrest Williams' talk, may have uses for other projects, such as making anti-counterfeit identifiers or projecting artificial stars into the night sky that can be used to calibrate astronomical instruments. The projector, which creates a 2:1 image twice as wide as it is high, will be marketed ...

UCLA scientists discover ultrasonic communication among frogs

...ve. "We had very little information suggesting that they would be in this location," said Arch, lead author of the study. "We found them our first night out." The study was published April 29 in the online journal PLoS ONE , a publication of the Public Library of Science, and is available at http:...

Conservationists seek to identify prime stopover sites for migrating birds

...r migratory bird species." Migrating birds travel several hundred miles to their destinations. Radar shows that birds fly approximately 10 hours at night at 30 miles per houror 200 to 300 miles a night. According to Waud, as much as 85 percent of deaths in migratory bird populations occur while bird are...

Demonstration Features Commercial Technology for Combating Terrorism

...lay and denial technology; explosives detection systems; explosive ordnance disposal equipment; fence sensor systems; individual protective equipment; night vision and optics devices; non-lethal weapons and technology; physical security equipment sensor and surveillance systems; robotic vehicles and system...

Study finds link between hot flashes and lower bone density in women

...one sub-study of the Study of Women's Health Across the Nation to determine whether women with vasomotor symptoms (VMS) which include hot flashes and night sweats had lower bone mineral density. The researchers found that postmenopausal women with VMS had lower lumbar and total hip bone mineral de...

Dolphins maintain round-the-clock visual vigilance

...the dolphins were still responding as accurately as they had done at the beginning of the experiment. The team also enticed the dolphins into a bay at night where they could be shown the horizontal and vertical bar shapes, and found that the dolphins were as sharp at the end of the 120 hour experiment as t...

A glimpse of future GMES Sentinel-1 radar images

... developing for the GMES initiative. Sentinel-1 is a constellation of two C-band radar satellites that will provide continuous all-weather, day and night imagery for use in a range of diverse services from marine and land monitoring to emergency services needed immediately following disasters from natu...

When every photon counts

...numbers of the highly light-sensitive rods, the photoreceptor type used for night vision. This allows the detection of light levels millions of times lower t...ions for contacts. However, in nocturnal mammals the advantages of improved night vision seem to have prevailed. ...

International prize for Nottingham spine research

...d down with half their body weight to simulate the effect of being upright and walking around during daytime hours and lying down unloaded to simulate night time sleep conditions. The results of the study could help to inform the way in which degeneration of the intervertebral discs is medically managed...

ChemoBrain: How cancer therapies can affect your mind

...tor of news operations at the Boston Globe, in charge of the Sunday paper. Her previous positions at the same paper include health and science editor, night news editor, and city editor. ...

Cats' eye diseases genetically linked to diseases in humans

...l recessive RP is among the most common cause of retinal degeneration and blindness, with no therapeutic intervention available. Initially it leads to night blindness, then loss of peripheral vision and, with progression, there is also a loss of central vision. Like humans, Abyssinian cats with the...

Demonstration Targets Terrorism

...lay and denial technology; explosives detection systems; explosive ordnance disposal equipment; fence sensor systems; individual protective equipment; night vision and optics devices; non-lethal weapons and technology; physical security equipment sensor and surveillance systems; robotic vehicles and system...

UNC study: Tinkering with the circadian clock can suppress cancer growth

...rhythms affects people's health. One of the largest epidemiological studies ever performed, the Nurses' Health Study, found that nurses who worked the night shift had a higher incidence of breast cancer than those who worked days. Another study of flight attendants whose internal biological clocks had been...

Single gene lets bacteria jump from host to host

... luminescent harmony with two distinct hosts: the diminutive nocturnal bobtail squid and the reef-dwelling pinecone fish. In the squid, which feeds at night near the ocean surface, one strain of the bacterium forms a light organ that mimics moonlight and acts like a cloaking device to shield the squid from...

City of Newark first in nation using cars to power grid

...rators smooth power output fluctuations. "Wind tends to blow stronger at night when the electric load is low," he said. "If electric vehicles charged at night with wind power, the grid operator could use the energy in the batteries, w...

Is there a relationship between sleep-wake rhythm and diabetes?

...ceptors. It is assumed that this receptor inhibits the release of insulin via the neural hormone melatonin. The melatonin level in the body is high at night and declines in daylight, whereas the insulin level is higher during the day than in the night. Taken together, these new data implicate an associatio...

Study helps explain connection between sleep apnea, stroke and death

...n as cerebral autoregulation. This study found that the repeated surges and drops in blood pressure and blood flow during numerous apnea episodes each night reduces the brain's ability to regulate these functions. Condition a health risk Up to 4% of the population suffers from obstructive sleep ap...

Texas College Police Unit Deploys BIO-key(R) Mobile Data System

...," according to Collin College Police Department Captain Michael Gromatzky. "With more than 44,000 students spread across five open campuses with day, night and weekend classes, we're like a small city." With the deployment of BIO-keys' MobileCop solution, Collin College law enforcement officers wil...

Ocean acidification from CO2 emissions will cause physiological impairment to jumbo squid

... According to Seibel, jumbo squid migrate between warm surface waters at night where CO 2 levels are increasing and deeper waters during the daytime wher...ing CO 2 levels may prevent this. The band of habitable depths during the night may become too narrow." Carbon dioxide enters the ocean via passive diffus...

Practice as well as sleep may help birds learn new songs

...ract with changes during the day as birds listen to tutor songs and practice singing." The authors suggest that reactivation of sensory information at night might be a general mechanism for learning a new skill. In previous work, Margoliash and his team identified places in the brain where nighttime ac...

Study on wildlife corridors shows how they work over time

...tely predicts where seeds go by releasing artificial seeds that literally glow in the dark. We release them into the wind and then find them again at night with a black light. We can record where the seeds go by using a GPS and match what is happening in reality to the model's predictions." For unassis...

Lab test for allergy scoops national

...ects the wealth of activity in healthcare innovation developed here in the East Midlands." An awards ceremony for the Da Vinci Awards was held last night (November 25) at Loughborough University, compered by BBC newsreader Kay Alexander. The after dinner speaker for the event was Professor W Angus Walla...

Light pollution offers new global measure of coral reef health

...ntbut unfortunately they're also incredibly fragile," Longcore said. "Using night light proximity, we were able to identify the most threatened and most pris...-edited a book on the subject called "Ecological Consequences of Artificial night Lighting." Since then, Longcore has been at the forefront of widening in...

ORNL supercomputer simulation wins prize for fastest-running science application

...on earth more than 500 years to work through as many calculations as DCA++ gets through in a single day--and that's assuming each of us worked day and night solving one calculation a second. Researchers have known about superconductors for nearly a century and have prized these materials both for their ...

Study sheds new light on dolphin coordination during predation

...le fish at a time and each lanternfish may only be 3-5 inches long. To match their 3,200-calorie-per-day diet, they need to eat at least 650 fish each night plus enough extra to fuel the energy they burn during the hunt, perhaps another 200 to 300 fish. "To make that work, they need to eat about a fish...

Current mass extinction spurs major study of which plants to save

...th nearly 50 percent of all species disappearing, scientists say. Because of the current crisis, biologists at UC Santa Barbara are working day and night to determine which species must be saved. Their international study of grassland ecosystems, with flowering plants, is published this week in the Pro...

Scent on demand: Hebrew University scientists enhance the scent of flowers

...i succeeded, together with other researchers, to find a way of enhancing the scent of a flower by ten-fold and cause it to emit a scent during day and night - irrespective of the natural rhythm of scent production . The development, which has been patented by Yissum, the Hebrew University's technology ...
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