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Tag: "tip" at biology news

Uniform tungsten trimers stand and deliver

...rons to measure the distance from the microscope's tip to a small space between atoms," White explained. The collaborators also characterized the cluster mass, determined the ratio of tungsten to oxygen atoms in the cluster, and used X-ray photoelectron spectroscopy to identify the tungsten oxidation sta...

With record resolution and sensitivity, tool images how life organizes in a cell membrane

...t topography, but not chemistry, as its microscope tip ''feels'' its way through samples. Plus it handles samples less ordered than those addressed by X-ray crystallography, which requires that samples be turned into crystals before analysis. Geologists, cosmologists, materials scientists and engineers ...

Mobile DNA part of evolution's toolbox

...whether this is a special case or whether it's the tip of the iceberg," says Haussler, who is at the University of California, Santa Cruz. A report on the research is published in the May 4, 2006, issue of the journal Nature. Haussler and his colleagues were led to the discovery through their work on...

Proteins as parents

...id support and the other end was adsorbed onto the tip of the atomic force microscope. When the tip is gradually pulled away from the support, the protein elongates and the force increases until the p...

New research promising for improving brain cell survival after brain injury

...d proteins produced after injury, which appears to tip the balance towards nerve cell survival, instead of death," he said. Prof Tan is the first to show that this mechanism can be fruitfully manipulated to prevent brain cells from dying. For this reason, his work has been published by the Journal of ...

Study reveals details of mussels' tenacious bonds

...gle DOPA amino acids to an atomic force microscope tip and measured the strength of interaction between DOPA and inorganic and organic surfaces. They found that on an inorganic metal oxide surface DOPA interacts with the substrate by a coordinated noncovalent interaction, which is over an order of magn...

New GI technologies improve internal organ visualization

... practice of using an ultrasound transducer at the tip of an endoscope to visualize and offer therapeutic intervention to the gastrointestinal tract and its surrounding structures, which includes nearby vasculature and organs. The researchers tested the feasibility of EUS to perform angiography in thr...

Five surprising facts about starvation that could change the international agenda

... says Webb. "Wasting in emergencies represents the tip of the iceberg," write the authors. "Ironically, the international community has become much more adept at saving the lives of wasted children in the context of catastrophes than in the context of typical development," state the authors. The autho...

Genetic tug of war determines sexual differentiation

... a different genetic or environmental stimulus may tip the balance between these signals in other species. In nonmammalian vertebrates, other cues provide the primary stimulus for embryonic gonad differentiation, Capel said. For example, environmental temperature is the key to whether reptiles develop a...

How plants avoid feeling the burn

... new insulating coat of polyethylene for the probe tip of a Scanning Tunneling Microscope (STM), which is...amber, are first picked up by the STM probe's gold tip and chemically bound between these two electrodes, forming a kind of nanoscale bridge. "Gold is a so...

Tiny shock absorbers help bacteria stick around inside the body

...hair-like protrusions with a sticky protein on the tip that lets them cling to surfaces. The coiled, bung...iae, have an adhesive protein called FimH at their tip that binds in an unusual way to a sugar molecule on a surface. The FimH-sugar combination makes a ...

Computer scientist sorts out confusable drug names

.... PPC looked at the problem and then, based on a tip from a professor at the University of Maryland, turned to Dr. Greg Kondrak, a professor in the University of Alberta Department of Computing Science. "During my PhD research, I wrote a program called ALINE for identifying similar-sounding words in ...

New Research Shows Artificial Light at Night Stimulates Breast Cancer Growth in Laboratory Mice

...nd that interference with internal timekeeping can tip the balance in favor of tumor development,?said Blask. “The effects we are seeing are of greatest concern to people who routinely stay in a lighted environment during times when they would prefer to be sleeping,?said Mark Rollag, Ph.D., a visiting r...

Chemical signaling helps regulate sensory map formation in the brain

...ndmarks are then recognized by growth cones at the tip of axons ?the projections that grow out from the retinal neurons and into the brain. The wandering axons use these signals to locate their destinations in the map. Twenty years later, in 1983, Alfred Gierer developed computational models of this pro...

Report lists top 20 most-vulnerable African carnivores

...to the end of the chromosome," Cech said. The very tip of the chromosome must remain free to allow access to the site on the enzyme that directly extends the telomeres, Cech pointed out, so the anchor site secures the DNA molecule nearby, slightly closer to its center. Cech is optimistic that the new p...

Groovy protein essential for promoting cancer development

...to the end of the chromosome," Cech said. The very tip of the chromosome must remain free to allow access to the site on the enzyme that directly extends the telomeres, Cech pointed out, so the anchor site secures the DNA molecule nearby, slightly closer to its center. Cech is optimistic that the new p...

Genome changes tracked during multiple myeloma initiation, progression and treatment

...ory clearly indicates that we are dealing with the tip of the iceberg when it comes to the universe of cancer genes," says Dr. DePinho. ...

Leave it to salmon to leave no stone unturned

... The largest females are more than a yard long and tip the scales at 45 pounds or more. The biggest nests are nearly a foot and a half deep and extend up to 17 square yards –about the size of two parking-lot stalls. The rims around these craters can be the bane of boaters who, even with boats meant to na...

FSU biologist says new dinosaur is oldest cousin of Tyrannosaurus rex

...rickson contends that this discovery is merely the tip 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 gene...

Penguins waddle but they don't fall down, UH researchers say

...r penguins, are three feet tall on average and can tip the scales at up to 35 pounds. And they were also very eager to perform. "It's almost like playtime for them. We can't hold them back," Kurz said. "There is one in particular that always wants to cut in front of the other penguins, so that he c...

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