Tag: "rings" at biology news
Experiment suggests limitations to carbon dioxide 'tree banking'
...tra CO2 from computer-controlled valves mounted on rings
of towers, and four other matched plots receiving no extra gas. Trees in the loblolly pine-dominated forest plots that were treated produced about 20 percent more biomass on average, the researchers found. But since the amounts of available water a...
Tiny tweezers and yeast help St. Jude show how cancer drug works
...or which the gene codes. Bjornstis team inserted rings
of double-stranded DNA called plasmids into yeast cells to create a model for studying camptothecins effect. Topotecan is an analog or related drug of camptothecin. As in DNA replication, gene expression requires the unwinding of the DNA strands. How...
2007 Joint Assembly in Acapulco -- press conference schedule
...erienced sustained arid conditions. Data from tree rings
and other forms of paleohydrological evidence yield new evidence of linkages between climate warming, decreases in eastern Pacific sea surface temperatures, and persistent droughts in those regions. In the context of the past 1,000 years, the current...
Hearts of male and female rainbow trout are different
...ethodology Uniform ventricle strips or transverse rings
were cut from 10-12 month old, hatchery raised, se...d and assayed for citrate concentration. Ventricle rings
were processed, sectioned and stained. Light microscopy was used to capture images of ventricle laye...
Tree rings show elevated tungsten coincides with Nevada leukemia cluster
... research report. The amount of tungsten in tree rings
from Fallon quadrupled between 1990 and 2002, whereas the amount in tree rings
from nearby towns remained the same, according to a research team led by Paul R. Sheppard of The Uni...
Fish growth changes enhanced by climate change
..., which show similar characteristics to the growth rings
used to date the age of trees. The work was done in collaboration with the Victorian Marine and Aquatic Fisheries Research Institute, which has specialist skills in analysing otoliths. Water temperatures have been obtained from a 60-year-long reco...
Researchers find ways to reduce side effects in the treatment of damaging protein plaques
... clusters are substituted for carbon-based benzene rings
commonly found in pharmaceuticals of all types, including COX inhibitors, which give unwanted side effects. COX activity is seen in common nonsteroidal anti-inflammatory drugs like aspirin and ibuprofen. However, prolonged use of COX inhibitors can...
Structural basis for photoswitching in fluorescent proteins brought into focus
...observed that the protein rapidly went dark as the rings
rotated about 180 degrees and flip by some 45 degr...zes and become negatively charged. This causes the rings
to flip back into the fluorescent state. Having control of light emission would allow for more pre...
500,000 years of climate history stored year by year
... storm or waves disturb this process. These annual rings
in the sediment can be traced back for hundreds of thousands of years. In some places the layer of sediment is up to 400 metres thick, the Bonn palaeontologist Professor Thomas Litt explains. There are about 20,000 annual strata to every 10 metres, h...
How long is a child a child?
...cremental growth lines in teeth, similar to annual rings
in trees, developmental rate and time may be accurately established millions of years after death. Research during the past two decades has shown that early fossil humans (australopithecines and early Homo) possessed short growth periods, which were ...
Gold nanorods assemble themselves into rings
...ed to press up against the round droplets and form rings
around them. The polymer coating prevented the rod...lications." Zubarev said thousands of well-defined rings
can be produced in a matter of seconds using the approach from his study. "This method is surprising...
Long-lived deep-sea fishes imperiled by technology, overfishing
...otoliths, or ear bones, which regularly accumulate rings
much like trees. Variations in the size of the rings
can indicate ocean productivity that year. Harvesting older fish lessens the likelihood of many pro...
Researchers warn milk eliminates cardiovascular health benefits of tea
... (lining) cells showed that tea relaxed the aortic rings
by producing nitric oxide, which promotes dilation...al model, we determined vasodilation in rat aortic rings
by exposing them to tea on its own and tea with individual milk proteins added, and got the same res...
New study links western wildfires to Atlantic Ocean surface temperatures
... in the West as shown by fire scars in annual tree rings
studied by the researchers, said Thomas Kitzberger...as fir, at 241 sites -- the largest record of tree rings
linked to past wildfires ever assembled. "This trend of warmer sea-surface temperatures in the Nor...
Protein's effects essential for kidney-to-bladder urine transfer
... and an inner, circular layer where the cells form rings
around the tube of the ureter. "In mutant mice, the longitudinal muscle is fine, but the circular muscle is either missing or has become longitudinal," Miner says. Swat and Miner are planning to collaborate with geneticists to see if functional o...
Soil nutrition affects carbon sequestration in forests
...C. In FACE studies, groups of trees are circled by rings
of towers that provide CO2 to increase atmospheric concentrations of the gas around the selected trees. At the Duke FACE experiment, half of each ring was fertilized with nitrogen to study the effect of added soil nutrients on tree growth under eleva...
Nano design adjustment may help find, clear some water contaminants
...ng between halides and electron-deficient aromatic rings
will occur over the center of a ring. However, the lab experiments on crystalline material found that the binding occurs as much as 2 angstroms, or 0.2 nanometers from the center. "It's very important to consider these off-centered anion-interactio...
Squid-inspired design could mean better handling of underwater vehicles
...d jellyfish to move themselves underwater. Vortex rings
are formed when a burst of fluid shoots out of an opening, moving in one direction and spreading out as it curls back. The researcher's nature-inspired vortex generators could be used in a wide array of applications. One of them, a seeming take-o...
Protein's tail may be flu virus's achilles heel
...eplicating factory, the NPs come together in small rings
as building blocks. Many NP rings
stack one atop the other in a slightly off-registered fashion, forming long helical-shaped columns. ...
ASU researchers test antibacterial effects of healing clays
...hree regions, two silicate layers with tetrahedral rings
bounding an octahedral core. The "peanut butter" is the charged cations, for example, potassium, that stick to the negatively charged tetrahedral ring surface. And the jelly? Organic compounds or other species of any or no charge are possible. This i...
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