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Tag: "hang" at biology news

Brain's white matter -- More 'talkative' than once thought

...at of protective myelin. The immature cells simply hang around and divide very slowly, waiting to be spurred into action. To learn more about OPCs that reside in the brain’s white matter, the Johns Hopkins researchers measured activity from individual precursor cells in the corpus callosum, a region o...

How trees manage water in arid environments

...d it's in the laundry, you can wash it by hand and hang it outside. It will be dry in 15 minutes. Not in Indiana. In semi-arid environments such as the southwestern United States, humidity is so low that water is scarce to begin with and hard to hold onto when there is a rare cloudburst. Rain that coll...

Ocean's 'twilight zone' may be a key to understanding climate change

... particles, oceanographers use cones or tubes that hang beneath buoys or float up from sea floor. That, Buesseler said, "is like putting out a rain gauge in a hurricane." While many studies have investigated the surface of the ocean, little research has been conducted on the carbon cycle below. The VER...

Trotting with emus to walk with dinosaurs

...ense of 165-million-year-old dino tracks may be to hang out with emus, say paleontologists studying thousands of dinosaur footprints at the Red Gulch Dinosaur Tracksite in northern Wyoming. Because they are about the same size, walk on two legs and have similar feet, emus turn out to be the best modern ve...

Tarantulas produce silk from their feet

...Though ground dwelling, these spiders can normally hang on to vertical surfaces by using thousands of spatulate hairs and small claws. However, the scientists noticed that when the spider started to slip down the surface, it produced silk from all four pairs of legs, allowing it to adhere to the glass for...

Bones hold the key to blood renewal

...ntiated; with the help of other nearby cells, they hang on to their juvenile qualities. Only when they leave the niches do they morph into specialized blood cells, possibly becoming immune cells for fighting infection or cells for blood clotting and healing after injury. They can even respond to calls for...

Tiny shock absorbers help bacteria stick around inside the body

...ke structure of the protrusions helps the bacteria hang on tightly, even under rough fluid flow inside the body, researchers report in the journal PLoS Biology. A group of researchers at the University of Washington in Seattle and ETH Zurich in Switzerland have been studying how the bacterium E. coli at...

For the first time: Longevity modulated without disrupting life-sustaining function

... dormant, hibernation-like stage in which they can hang on for months but don't reproduce. Unless Smk-1 is missing, that is. Without Smk-1 to provide guiding assistance, DAF-16 is unable to slow down the aging process, and the worms die young. "These mutants are shorter lived because they are unable to...

U-M scientists discover identifying markers for primitive blood-forming stem cells

.... Knowing where primitive hematopoietic stem cells hang out in blood-forming organs will give scientists important clues to how they work, according to Morrison. For this reason, the identification of markers that allow the localization of HSCs in tissues has been a long-sought goal in the field of hemato...

Errors in the measurement of global warming corrected

...e standing in the shade," said Sherwood. "We can't hang our hats on the old balloon numbers." After taking this problem into account, the researchers estimate there has been an increase of 0.2 degree Celsius (°C) in the average global temperature per decade for the last thirty years. Over the next centur...

Study uncovers dirty little secret: Soil emissions are much-bigger-than-expected component of air pollution

..., they help form the dirty brown clouds that often hang over major cities, they contribute to acid rain and they play a role in global climate change. In addition to equatorial Africa, hot spots for soil emissions include the central plains of the United States; southwestern Europe, primarily the Iberian...

Falling ants glide back to trunk to avoid dangers of forest floor

...h that they come in backwards to the tree, hit and hang on, though they often tumble down the trunk a few ...egs act like grappling hooks to snag the trunk and hang on. "When they drop, they often glide away from the trunk, then turn and come in backwards," Dudley...

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