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Tag: "dark" at biology news

Genome-wide mouse study yields link to human leukemia

...p as smudgy blobs on a test film. If a fragment is dark and definite, it is not methylated. If, on the other hand, it loses at least 30 percent of its intensity, it is regarded as methylated. In the study, the research team tested 2447 fragments in each animal. They found anywhere from 45 to 209 (.8 perc...

Carnegie Mellon scientists develop tool that uses MRI to visualize gene expression in living animals

...ctly different signal. The resulting image reveals dark areas that indicate the presence of the MRI reporter. "Our technology is adaptable to monitor gene expression in many tissue types. You could link this MRI reporter gene to any other gene of interest, including therapeutic genes for diseases like ca...

Grizzlies set to invade high Arctic?

...zzly features including a prominent shoulder hump, dark brown hair on and around the rear legs, and faded (grizzled) hair on the rest of the body. Then in the summer of 2004, Dr. England's research group found physical proof that a grizzly bear was indeed calling Melville Island home. Near a cabin used b...

Advancements In Genomics Foster Deep Sea Discoveries

... microbes in high-pressure cylinders kept cold and dark in Bartlett’s laboratory at Scripps. Bartlett’s past genetic analyses revealed a creature that can sense changes in pressure using a natural barometer-like mechanism, which adjusts the flexibility of its membranes to cope with different levels of pr...

Cousin of Asian super termite invades Florida

...ening. The head and dorsal surface of the body are dark brown in contrast to its yellow-brown underside, thereby giving the flying insects a "two-toned" appearance. Termite "soldiers" are characterized by their teardrop-shaped heads and the presence of a pore that secretes a sticky, milk-like fluid. When...

Bee mites suppress bee immunity, open door for viruses and bacteria

...a bee. The mites are about the size of a pin head, dark brown in color and visible on close inspection. This bee mite probably arose in the Eastern or Chinese Honey Bee population and hopped over to the United States in 1987. They quickly infested western or European honey bees. One sign of infection is ...

Deep thinking: Scientists sequence a cold-loving marine microbe

At home in the deep, dark Arctic Ocean, the marine bacterium Colwellia psychrerythraea 34H keeps very cool--typically below 5° degrees Celsius. How does the bacterium function in this frigid environment? To find out, scientists at The Institute for Genomic Research (TIGR) and...

Genetic links could unlock clues to leading cause of blindness

... in older adults, yet researchers are still in the dark about many of the factors that cause this incurable disease. But new insight from University of Florida and German researchers bout a genetic link between rhesus monkeys with macular degeneration and humans could unlock secrets about the earliest st...

Blink, and the brain misses it

...ediately notice if the outside world suddenly went dark every few seconds. But we rarely become aware of our blinks, even though they cause a similar reduction in the amount of light entering the eye. So why are we not aware of the frequent mini-blackouts caused by blinks? In the 1980s, scientists discov...

Attacks of King George III's madness linked to key metabolism molecule

...oxic, and can cause a range of symptoms, including dark colored urine, abdominal pain, nausea, vomiting, constipation, weakness in the limbs, and psychiatric symptoms such as confusion, fits and hallucinations. Earlier this year, the British journal Lancet published a report saying that a test of strands...

Say what? Bacterial conversation stoppers

...yi, a marine species that naturally glows in the dark in the presence of a crowd. In the test tube, AI-2 production by either species turned up the marine bacteria's light and turned on the quorum-sensing genes in E. coli. That confirmed what the scientists already suspected: the linguistic versatili...

Looks matter to female barn swallows

...elly feathers. If the male's red breast is not as dark as other males in the population, the female is mo...r varies among birds from very pale red-brown to a dark rusty-red. Like many songbirds, half of all male barn swallows typically care for at least one young...

Scientists devise way to measure RNA synthesis on the fly in a live cell

...gn experiments that might help them determine what dark matter is made of. "RNA molecules could be called the 'dark matter' of biology," Cluzel said. Biologists have long known that RNA serves as an important intermediary between DNA and the factories throughout the cell that produce proteins. Some biolo...

Study shows eutrophic lakes may not recover for a millennium

...as nearly 80 percent of its watershed in the rich, dark soils of Wisconsin farm country. It ranks as one of the most studied lakes in the world, and in recent decades has experienced a steady decline in water quality due to accelerated runoff and the resulting eutrophication. But the lake is similar in m...

Use of high hydrostatic pressure to inactivate Hepatitis A virus in oysters studied

...undice, a yellowing of the whites of the eyes, and dark urine. The disease generally runs its course in two months, but can linger as long as six. While survival rates for Hepatitis A are above 99 percent, the disease can be very dangerous for infants, the elderly, immunosuppressed people, and those with ...

'Underground' tunnels discovered as means for communication between immune system cells

...e screen it looked like flash bulbs going off in a dark concert arena," Dr. Salter recalled of that moment, when to both their great surprise the researchers witnessed how that little mishap had caused the macrophages to release bursts of calcium. Returning to dendritic cells, they found that by giving a...

'Smart' nanoprobes light up disease

...idea is to develop a 'smart' nanostructure that is dark in its original state but lights up very brightly ...were attached to the gold particles. They remained dark until the nanostructures were exposed to collagenase after which the luminescence steadily returned....

Student scientists create living bacterial photographs

...n't, based on whether it was growing in a light or dark place in the dish. The resulting images are a coll...ern of light. E. coli are found naturally in the dark confines of the human gut and wouldn't normally sense light, so the students had to engineer the uni...

Bats use touch receptors on wings to fly, catch prey, study finds

Bats have an "ear" for flying in the dark because of a remarkable auditory talent that allows them to determine their physical environment by listening to echoes. But an Ohio University neurobiology professor says bats have a "feel" for it, too. John Zook's studies of bat flight suggest tha...

Microbes under Greenland Ice may be preview of what scientists find under Mars' surface

...analyzed ice several meters above bedrock that was dark gray in appearance because of its high silt content, and identified dozens of types of both aerobic (oxygen-loving) and anaerobic (oxygen-phobic) microbes. They estimated that 80 percent of the microbes were still alive. Though methane has been dete...

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