Tag: "pile" at biology news
Researchers discover how worms' noses sense oxygen
...Apparently, when oxygen levels are high, the worms pile
onto the densest clumps of bacteria, because that's where oxygen levels are lowest. "The swarm of worms and density of bacteria together lower the oxygen concentration in that immediate environment," he said. "We found that when we lower the oxygen c...
UCLA researchers recreate patterns formed by mammalian cells
...e activator. The result creates areas where cells pile
up separated by empty spaces. The exact patterns depend on the strength and speed of the two proteins. The UCLA researchers knew the likely activator protein was BMP-2; it was produced by the cells and caused cells to draw together. One of the rese...
For a male sand goby, playing 'Mr. Mom' is key to female's heart
...hells, they also hollow out a space under them and pile
sand on top to disguise them from predators, St. Mary said. The fish also use their pectoral fins to fan water over the eggs, creating a current of fresh, oxygenated water needed for them to mature. In the experiment, the researchers allowed male an...
University of Colorado archaeologist, colleagues hot on the trail of ancient Persian warships
...ten the first clue that a shipwreck is nearby is a pile
of artifacts collected by these wonderful creatures with an antiquarian's passion for old things." The researchers hypothesize a vessel likely sunk there and landed on a deep shelf, spilling cargo. The site was chosen for the first survey by the tea...
New study finds evolutionary diversification in Hawaiian spiders
...rior studies have shown that more and more species pile
in until there are more than the community can hold. At that point, species compete like mad, and, after a short period, only those most adapted to living together remain. Gillespie concludes that there are fundamental similarities between the largel...
A big surprise: Young nerve cells can rewind their developmental clocks
...to the innermost layer, layer 6. Subsequent layers pile
up above layer 6 (between layers 6 and 1), and in descending numerical order from 5 to 2. Each layer has a specific type of neuron associated with it. The researchers looked at the cortical layers in embryonic mice at a time in their development...
Genetic master switch sends bacteria toward 'seafood dinner'
...h insoluble material, a cousin to cellulose, would pile
up on the ocean's floor and wreak havoc with marine ecosystems. Fortunately, armies of bacteria act as chitin's cleanup crew, and two Johns Hopkins University biologists have made a key discovery about how and when these microscopic soldiers launch t...
Scientists announce long-sought mouse model of human pancreatic cancer
...d advancing age (mistakes in the DNA code of genes pile
up and the body's DNA repair mechanisms fail to keep pace). Several particular mutations have been identified in tissues taken from pancreatic cancer patients. Among them are KRAS - a growth signal stuck in the "on" position, resulting in unchecked c...
Trade Center debris pile was a chemical factory, says new study
The fuming World Trade Center debris pile
was a chemical factory that exhaled pollutants in ...ering. "Now that we have a model of how the debris pile
worked, it gives us a much better idea of what the people working on and near the pile
Diet researcher asks how now lemur chow?
...n unknowingly overfeeding its animals. The larger pile
of pounds of food pellets, cabbage and bananas rep... had been giving the lemurs -- the equivalent of a pile
of Big Macs and fries. And the smaller pile
represented the human version of a more reasonably sized...
Insulin study sheds light on physics of crystal growth
..., called a "step." Molecules tend to aggregate and pile
up unevenly from one spot on the step, building up...en make their way into lasers. As the step bunches pile
higher, they also pile
up faster because they are reaching areas of greater concentration of molecul...
Physics tip sheet #34 - April 1, 2003
...y essentially pulling the bottom electron from the pile
in a carbon atom using an x-ray pulse. All the other electrons fall down to fill the gap and the energy released knocks another electron out. This electron is emitted along the line from the carbon atom toward the oxygen atom, creating the electron "...
Special report: Personal genomics
...f diagnostic chips. Licensing fees are expected to pile
up, increasing the price of the chips, since many genes being tested for will be patented. How ironic, then, if decoding people's genomes is what ultimately sets them free from the widespread privatisation of their genes....
Water world: The sequel
...As additional water molecules are introduced, they pile
up ontop of these islands. Slight heating will break these islands up intoholes that form beautiful patterns, like nanometer-scale snow flakes." Working with Salmeron on this study were Toshi Mitsui and FrankOgletree, both with Berkeley Lab's Mater...
Human and fly studies tally good and bad mutations, stress ongoing role of natural selection
... population by natural selection, but "transiently pile
up before their exit." The assembly of fruit flies, the Nature paper shows, is no less shoddy. These papers do not mean the end of the neutral theory, cautions Wu. But evolutionary geneticists familiar with the work expect these to be the first of...
February media highlights - GSA Bulletin
... within the basin or flowed down the Eel Canyon to pile
up on the abyssal plain as the Gorda fan. Paleoseismic evidence for time dependency of seismic response on a fault system in the southern Arava Valley, Dead Sea rift, Israel. Rivka Rivka Amit, et al. Geological Survey of Israel, 30 Malkhe Israel Stre...
Scientists use gene therapy to correct sickle cell disease in mice
...ff assuming a sickle shape. The sickled red cells pile
up, causing blockages and damaging vital organs and tissue. In the study led by scientists at Harvard Medical School and the Massachusetts Institute of Technology, mice were bioengineered to contain a human gene that produces defective hemoglobin, ca...
Lab scientists develop DNA signatures for salmonella strain that are expected to drastically speed detection
...ions, whether they stem from feed, water, a manure pile
or even processing equipment, according to Andersen. "This technology could be used widely in the future. I think the day will come when virtually every poultry farm is analyzed for the presence of salmonella enteritidis." The California Egg Commiss...
Parasite offers natural way to control leaf-eating slugs
...ch of several hundred tiny worms resembles a small pile
of white cottony threads, he said. Instead of spreading poison throughout the farm or garden, people could apply a tiny scoop of worms to wherever the nocturnal slugs sl...
The skin's acid coating: SFVAMC researchers explain its origin and how it maintains skin integrity
...soriasis, in which skin cells are too cohesive and pile
up on the skin's surface, Fluhr said. "It may be that by artificially adjusting the skin's surface acidity, we can optimize its barrier function and promote improvements in skin health," he said....