Tag: "spot" at biology news
How does a zebrafish grow a new tail?
...gnals, cells waiting for their calling learn which spot
to take to help form the embryo, what kinds of cells to become there, and how many cells like themselves should be reproduced. These streams of signals also tell stem cells in adult organisms what functions to undertake. Once tissue formation starts,...
Dust to gust
... on the shore of the Atlantic and at an additional spot
above the ocean. The data revealed that some 56 percent of the dust reaching the Amazon forest originates in the Bodélé valley. They also showed that a total of some 50 million tons of dust make their way from Africa to the Amazon region every yea...
Jumping gene could provide non-viral alternative for gene therapy
... integration, be able to insert the gene at a safe spot
in the genome, that would be beneficial." He confirmed that targeting integration is possible in a paper he co-authored in 2005 also in The FASEB Journal. "We can do it in insects," says Dr. Moisyadi. "I think it's a short step to take it to a targe...
3-D ultrasound scanner could guide robotic surgeries
...pplications, surgeons could use the 3-D scanner to spot
potential tumors in real time during biopsy procedures, making a diagnosis of cancer harder to miss, the engineers said. Physicians today must rely on still images, such as CT scans, of a patients' organs captured prior to biopsy to locate lesions su...
What's nature worth? New computer models tell all
...rtrait of the ecosystem dynamics and value for any spot
on earth. "Land use planners, county commissioners, investment bankers, anyone who is interested," Cosntanza said, "will be able to go on the Web, use our new models, and be able to identify a territory and start getting answers." For example, if...
Seeing the serpent
The ability to spot
venomous snakes may have played a major role in the evolution of monkeys, apes and humans, according to a new hypothesis by Lynne Isbell, professor of anthropology at UC Davis. The work is published in the July issue of the Journal of Human Evolution...
Many cleaners, air fresheners may pose health risks when used indoors
...rs, wood cleaners, furniture maintenance products, spot
removers and multi-purpose solvents. A complete chemical analysis of these 21 products revealed that: Twelve contained terpenes and other ozone-reactive compounds at levels ranging from 0.2 to 26 percent by mass. Six contained levels of ethylene...
UGA study explains peaks and troughs of dengue epidemics
...ta on dengue. Southeast Asia has been a dengue hot spot
since the 1950s, but the researchers note that their model applies to other regions where all four dengue strains circulate. The researchers compared the data with results from mathematical models that explore ?both independently and collectively ?...
Is the brain wired for faces?
... face 'experts,' having learned over many years to spot
fine differences in upright faces, but not in inverted faces. That experience makes faces unique, but there's nothing scientifically special about faces," Riesenhuber says. The Georgetown scientists hypothesized that facial recognition does not rely...
New method enables gene disruption in destructive fungal pathogen
...brassicicola. This destructive fungus causes black spot
disease, leading to considerable leaf loss in such economically important crops as canola, cabbage, and broccoli. Genomic methods that allow the disruption of several thousand genes are needed because they allow high-throughput identification of ge...
Restoring seagrass beds: Is it for the birds?
... scarred grassbeds around the popular recreational spot
of Robinson Island in Orange Beach, Alabama. Robinson Island is a favored spot
in the summer, with constant boat traffic in its shallow waters. Its underwater shoal grassbeds, ho...
Lizard 'third eye' sheds light on evolution of color vision
...d nerve cells in that eye, which looks more like a spot
on the lizard's forehead, use two types of molecul... It turns out that some frogs and fish also have a spot
on their foreheads that might play the role of a light-sensing third eye. Yau hopes to pursue these ...
FSU biologist says new dinosaur is oldest cousin of Tyrannosaurus rex
...of the iceberg in that area. "China has been a hot spot
for dinosaur fossils since the 1990s," he said. Widely publicized research by Erickson –?who also is known as an expert in dinosaur and crocodilian dentition, or bite force –?has helped to generate interest in the sciences among young children, typi...
U of MN researchers develop way to visualize synchronized interactions of nerve cells in the brain
...s interaction in research subjects who looked at a spot
of light. Georgopoulos used MEG data from 248 sensors to detect the changing interactions over time. The measurements they recorded represent the workings of tens of thousands of brain cells. The large amount of data recorded from each sensor was...
Attractive birds more immune against bird flu
...n the journal Acta Zoologica, that the size of the spot
on a male collared flycatcher's forehead reflects ...combats viruses such as avian influenza. The white spot
is also attractive to female birds searching for a mate. Evolutionary biologists have long attempt...
Amazon rainforest greens up in the dry season
...in 2000. Once a day, MODIS takes a picture of each spot
on the Earth. Each pixel in the images represents... (250 meters) on a side. If it's too cloudy at one spot
one day, the next day's picture may be fine. Five years' worth of pictures means the scientists have...
For one Stanford doctor, the beat goes on during open-heart surgery
...neck to the side, just so, searching for the right spot
on the back of the heart to attach the next vessel...tor filled the air. Ihnken, head tilted, found the spot
he was searching for on the heart's backside and, finally, looked up. "Everything OK out there?" Ih...
T-rays: New imaging technology spotlighted by American Chemical Society
T-ray sensing and imaging technology, which can spot
cracks in space shuttle foam, see biological agents through a sealed envelope and detect tumors without harmful radiation, was the focus of a recent symposium at the national meeting of the American Chemical Society. The session was organized and ch...
'Computer-chemistry' yields new insight into a puzzle of cell division
...h extensive biochemical evaluations of the two hot spot
residues the study identified, one residue on the phosphatase and the other on the kinase. Both hot spots are located some distance from the molecules' active sites, Rudolph noted. Overexpression of the Cdc25 group of enzymes has been associated wit...
Biologists discover new pathway into plant cells
... was done with a pathogenic fungus that causes tan spot
of wheat, a costly plant disease that is found around the world, and in some places can cause crop losses ranging up to 50 percent. These fungi produce multiple toxins that attack wheat plants, reducing yields and ruining wheat used as seed. In the U...
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