Tag: "absorb" at biology news
No Such Luck: Nitrogen From Air Pollution Unlikely to Moderate Global Warming
...owth of plants and that the plants, in turn, would absorb
some of the extra carbon dioxide in the atmosphere to moderate global warming. That scenario now seems unlikely, say scientists at the University of Toronto and the University of Minnesota. In the December 6th issue of the journal Science ,...
Hot 'Lanta: NASA, School Kids Team To Study How Trees Help Cities Keep Their Cool
...pots. The difference has to do with how materials absorb
and release heat. Asphalt absorbs heat from the su...r into the atmosphere to keep themselvescool, also absorb
a lot of the incoming heat and release it over a longer period of time. ...
New Study Shows Dinosaurs From Gobi Desert Site Killed In Sudden "Sand Slides" Falling From Dunes - Study Also Reports First Dinosaur Tracks From Gobi
... Withtime such clays inhibit the dune's ability to absorb
water so that an unusuallyheavy rain can cause a slurry of wet sand to rush down its face. The clay in the Nebraska dunes (and presumably in the ancient Gobi dunes)accumulates because the dunes are stabilized by vegetation and so do notactively migr...
Scientists Identify Protein Essential For Iron Absorption, Boost Understanding Of Iron-Deficiency Anemia
... Both animals are unable to properly absorb
iron in the GI tract orsufficiently take it up at the cellular level. "It has taken 30 years from the discovery of these animal models tofinding out the true cause of these anemias," commented Garrick. The research re...
Cancer Cells Self-Destruct When "Sweet Tooth" Is Thwarted
...process that producesenergy from sugar, when cells absorb
it. When used with human tumor samples, 2-deoxyglucose killed some cell linesbut sparedothers. "The key factor appears to be a suicide-stopping gene, Bcl2, that preventscells from entering apoptosis too easily," Dang says. "If this gene is ...
Vitamin D Deficiency Appears Common In Hospital Patients
...ral population as well." Vitamin D helps the body absorb
minerals such as calcium and phosphorus, whichare critical components of bone. The body manufactures the vitamin in responseto sunlight, and its primary dietary source is through fortified dairy products. Vitamin D deficiency in adults can cause a s...
How Did Life Begin? Biochemical Evolution On Chemical Surfaces
...eolites are hydrophilic--water-loving--and tend to absorb
waterfrom their surroundings. But certain synthetic zeolites are organophilic,preferentially absorbing organic materials out of water. A naturally occurring organophilic zeolite--called mutinaite--was recentlydiscovered in Antarctica, and ...
Adults Need To Increase Intake Of Folate; Some Women Should Take More
...of older adultshave lost the ability to adequately absorb
the naturally occurring form of B12found in food. People over age 50 should meet most of their recommended intakewith synthetic B12 from fortified foods or vitamin supplements. New Dietary Standards The committee's report on Dietary Reference Intak...
Environmental Technology Breakthroughs Forecast -- Year 2008
...s much once glass is specially coated toreflect or absorb
heat radiation. Pacific Northwest is one of DOE's nine multiprogram nationallaboratories that conducts basic and applied research to solve problems inenvironmental, energy, health and national security arenas. The Laboratory hasbeen oper...
Chemical In Oyster Shells May Help Clean Oil Spills
... that amino acids in the shells form gels that can absorb
80-100times their weight in water. By analyzing the chemical structure, he anduniversity co-workers created new polymers that are attracting industryattention because they could help clean oil spills, speed water treatment oreven be used to make diap...
New Biomaterial Has 'Star' Power
...lesterol formation in arteries. The gel then could absorb
and remove these substances from the blood in a dialysis-type procedure, or perhaps work in the body to move these substances away from danger areas, such as the aorta. Peppas says another future use for star polymer gels might be to deliver hig...
Montana And Other Scientists Report On Life In The Ice
... the bits of gravel and sand in the sediment layer absorb
sunlight duringthe Antarctic summer and create little pockets of water. The sediments, blownonto the lake by the wind and then buried, have bacteria and othermicroorganisms called cyanobacteria attached to them. In the presence of liquid wat...
Digging In And Taking Cover
... by a bullet. So, even more shielding is needed to absorb
that, until eventually the radiation is worn down. Oddly, one of the better ways to stop radiation is with lightweight materials - hydrogen, boron, and lithium. The nuclei of heavy elements in cosmic rays can be shattered by lightweight atoms with...
Study Pinpoints Rare Molecular 'Transitions' As Possible Cause Of Skin 'Photoaging'
...lls inskin die, is among the chromophores known to absorb
approximately the samewavelengths of sunlight as d...imon said. "Urocanic acid in UV-A doesn't absorb
very strongly, so most of thephotons (particles of light) will pass through," he said. "But, every n...
Scientists Closer To Locating Gene That May Explain Cholesterol Absorption
...ounts. Some might eat a cholesterol-laden meal and absorb
30 percentof it; someone else might eat a low-cholesterol meal but absorb
60 percent ofit." The researchers studied 10 families with sistosterolemia, a rare,recessive...
Pitt Neuroscientists Uncover Mechanism For Neuron Death, Counter Long-Held
Assumptions About This Process
...rding to Dr. Reynolds. Normally, mitochondria can absorb
excess calciumfrom cells. But constantly cycling calcium out of the cytoplasm may sapmitochondria of energy they normally produce to charge cells. Calcium influxalso can spur the formation of free radicals that damage mitochondrial DNA orinevitably...
Research Answers Burning Questions About Pollution
... and the molecules of the pollutants in the flame absorb
the energy in the laser light. The molecules then "relax," losing that excess energy in the form of light a process called fluorescence. Optical detectors then pick up that light, and a computer analyzes its wavelength and intensity to tell the r...
Researchers Grow Healthy Human Placental Cells For Drug Research
...illi, the tree-like projections with which they absorb
materials from the placenta. Kniss said th... and boost the amount of nutrients the cell can absorb
and transport over a thousand fold.The placenta is a very space-efficient organ, s...
Virginia Tech Research Group Presents Improved Dental Materials
...thacrylates, the resulting tooth fillings will not absorb
as much water aspresent fillings. Their good mechanical properties will therefore not bedecreased as much as those of present fillings and the fillings should lastlonger," Shultz reports. "Ms Gunduz, in collaboration with other members in our resear...
Two Brandeis Scientists Shed Light On The First Photoreceptor Known To Set
... light, but other molecules are probably needed to absorb
light ofother colors," he says. Cryptochrome's penchant for blue light suggests itresets biological clocks at dawn and dusk's dimmest hours, when blue light ismost abundant. Cryptochrome hasn't been high on most researchers' lists of suspecte...
1 2 3 4 5 6 7 8 9 10