Tag: "gray" at biology news
Where broken DNA is repaired
...nds of the DNA double helix are severed occur per gray
of radiation. (One gray
is equivalent to 100 rads, an older unit signifying "radiation absorbed dose"; a gray
equals one jou...
Learning a second language -- Is it all in your head?
...ins scans, including calculations of the volume of gray
and white matter. Studies in the past have looked ...emphasized. Adults with smaller volumes of left HG gray
matter need not despair that they can never learn another language. We are already testing differen...
Wolves of Alaska became extinct 12,000 years ago, scientists report
The ancient gray
wolves of Alaska became extinct some 12,000 years ...o were genetically distinct. The ancient Alaskan gray
wolves are all more similar to one another than any of them is to any modern North American or moder...
Specialized, bone-crushing wolves of Alaska disappeared long ago
The ancient gray
wolves that once roamed the icy expanses of Alaska...ves in North America today. Regardless, the living gray
wolf differs dramatically from that which roamed Alaska just 12,000 years ago. The gray
wolf is on...
Researchers publish first marsupial genome sequence
...o generate the high-quality genome sequence of the gray
short-tailed, South American opossum, Monodelphis domestica, began in 2003 and cost approximately $25 million. The sequencing work was funded by the National Human Genome Research Institute (NHGRI), part of the NIH, and carried out at the Broad Insti...
The opossum genome sequence casts light on evolution, immunity and disease
...blishing three papers related to the genome of the gray
short-tailed opossum, Monodelphis domestica , a small, nocturnal marsupial found in South America. The papers will appear online on May 10, concomitant with the publication of the opossum genome sequence in the journal Nature . 1. A fresh start...
Legal ruling may put endangered species in danger
...ving only in Alaska, and it would have allowed the gray
whale to become extinct in U.S. waters," Vucetich went on to say. Vucetich and Michael P. Nelson, associate professor of environmental philosophy and ethics at Michigan State University, have collected 38 signatures on the letter protesting the new...
Researchers identify gene involved in dog size
...t includes domestic dogs diverged from that of the gray
wolf more than 15,000 years ago. Due to selective breeding by humans throughout history, dogs today exhibit an extremely wide range of body types and behaviors. In fact, dogs exhibit the greatest diversity in body size of any mammalian species. In ...
Chemical cues turn embryonic stem cells into cerebellar neurons
...a specific spot in the brains of newborn mice, the gray
layer on the surface of the cerebellum called the cerebellar cortex. Once in the brain, the cells extended parallel fibers, migrated to and incorporated themselves into the internal granule cell layer, and extended short projections called dendrites,...
News tips from the Journal of Neuroscience
... This week, Gilmore et al. examined the growth of gray
and white matter during the first weeks of life. T...ales, by~9%. Males also had slightly more cortical gray
matter, cortical white matter, and subcortical gray
matter. Neonates of both sexes had more left tha...
Human preference for other species could determine whether they survive
...and elephants, for example, are black and white or gray
but are highly preferred by humans. Millions of insects and the countless slimy invertebrates that occupy the oceans are likely not as lucky, Stokes said. "The work pretty conclusively shows there is a large difference of appeal among organisms, e...
Scientists sequence genome of parasite responsible for common sexually transmitted infection
... in the vagina, resulting in heavy yellow-green or gray
vaginal discharge, vaginal odor, discomfort during sexual intercourse and urination, irritation and itching of the genital area and, in rare cases, lower abdominal pain. In men, trichomoniasis is most common in the urethra; however, infected men ofte...
Small, smaller, smallest -- The plight of the vaquita
...xamples anywhere in the world than eastern Pacific gray
whales and northern elephant seals, both of which came back from low numbers and now represent true conservation success stories. Similar efforts are needed urgently for the vaquita, a small animal living in a small area with a small, and ever-smalle...
Blame our evolutionary risk of cancer on body mass
... great monkey wrench in that theory was the common gray
squirrel, which lives an amazing two decades, yet also expresses telomerase in great quantity. Evolution clearly didn't see long life in a squirrel to be an increased risk for cancer.Body mass, however, showed a clear correlation across the 15 specie...
Speak, memory: Research challenges theory of memory storage
...memories move to the neocortex, or "new bark," the gray
matter covering the hippocampus. This transfer process occurs during sleep, especially during deep, dreamless sleep. Many neuroscientists have embraced and built upon this theory of memory storage, or consolidation, for a generation. But the theory ...
Mysterious 'neural noise' actually primes brain for peak performance
...iences have blazed a new path to understanding our gray
matter. The traditional approach has assumed the brain uses the same method computation in general had used up until the mid-80s: You see an image and you relate that image to one stored in your head. But the reality of the cranial world seems to be ...
Giant pandas see in color
...ound some evidence that bears could tell blue from gray
and green from gray. Kelling used this study's des... piece of paper that contained one of 18 shades of gray
and one that contained a color red, green or blue. If the panda pushed the pipe located under a colo...
Naked mole-rat unfazed by oxidative stress
...e time thinking about how to hide the wrinkles and gray
hair than we do about what our cells are actually doing to usher us to the end. Physiologists are looking at molecules and cells to understand this process. One way to look at aging is to compare closely related organisms with different life spans....
ACS News Service Weekly PressPac -- September 27, 2006
...he basis of modern hair dyes that gradually darken gray
or white hair. Their research, published in the current (September) issue of the monthly ACS journal Nano Letters, found that the dye works by causing formation of nanocrystals of lead sulfide. That chemical compound forms inside hair shafts and colo...
Manatee traveler in northeastern waters not Chessie
...release in Florida. Chessie has a distinctive long gray
scar on his back, with several small white spots apparent within the scar. "Since then, Chessie also has acquired tail mutilations, but these are not severe," said Cathy Beck, a biologist with the USGS Sirenia Project. "Reports of manatee sightings ...
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