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Tag: "ring" at biology news

Dinosaur hearing, listening to muscle noise, quieter cubicles

...duce three important frequency bands of harmonics: ring (2500-3500 Hz), which helps singers to project their voices in an unamplified setting; brightness (5-15 kHz), important for conveying certain emotions such as happiness; and nasality (200-2000 Hz), which is becoming used as a popular commercial style...

Navigable nanotransport

... chose rigid, disk-shaped monomers equipped with a ring of special molecular "hooks" that can be activated by UV light. When a solution containing these disks is irradiated, the hooks grab on to each other, linking the disks into little, two-dimensional "patches" that in turn hook on to other patches. Onc...

Progress toward artificial photosynthesis?

...hite-like layers. The individual layers consist of ring systems involving carbon and nitrogen atoms. This porous material, called graphitic carbon nitride, is very heat-stable and, although it enters into many chemical interactions, it is so stable that it nearly always re-forms—an ideal catalyst. It can ...

Turning green gunk to gold, anti-cancer gold

...led an epoxide---a highly strained, three-membered ring oxygen-containing group, crucial for the drug's anti-cancer activity---becomes attached to the molecule. The epoxide group can be attached in two configurations, designated as alpha and beta. Scientists have known for several years that the beta ...

Paleontologists discover new mammal from Mesozoic Era

...nvil (incus) and the stirrup (stapes), plus a bony ring for the eardrum (tympanic membrane). The mammal middle ear bones evolved from the bones of the jaw hinge in their reptilian relatives. However, paleontologists long have attempted to understand the evolutionary pathway via which these precursor ja...

The connector rotation hypothesis? Phage do not pack their DNA by rotation

...a recently proposed nonrotating model in which the ring of ATPases alternately compresses and extends, drawing in the DNA. But further testing will be needed to confirm the validity of that model to the degree of certainty with which this team rejected the rotator hypothesis. ...

Ring-around-the-cell

...s itself tightly to the bone, while an impermeable ring forms around the cell perimeter. This ring functions to keep the bone-eating acids and enzymes produced between the cell and the bone confined ...

A sweet step toward new cancer therapies

...." The trick is to make breaks that cut across the ring structures, rather lopping off branches. By using metals as charge carriers, the researchers were able to do just that, yielding valuable structural information. In a project that continues to build on this line of work, Hakansson is collaborating...

ASU researchers test antibacterial effects of healing clays

..., 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 interlayer, as the peanut butter and jelly are termed, can vary in width and composition depending on the kinds of waters and elements present when it w...

Train your brain to hear your friends at a party

...e days. These subjects will be tested in a similar ring of sound and their performance measured over time. Early results show that humans also have the same ability to train their brain to cope with the hearing loss and become better at the task the longer they're wearing the earplug. Irving said: "Und...

Soil nutrition affects carbon sequestration in forests

...d 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 elevated CO2. The researchers further tested their hypotheses using data from FACE sites in Wisconsin, Colorado, and Italy. In the articles, the scientis...

Beauty and the brain

... facilitate processing of certain objects and they ring a louder bell. "This parsimonious explanation," he said, "accounts for cultural differences in beauty ?and historical differences in beauty as well ?because beauty basically depends on what you've been exposed to and what is therefore easy on your ...

Ring-like formations in drying DNA drops could affect hybridization studies

...DNA. To gain insights into the physics behind the ring phenomenon, Wong's team experimentally studied the...nce nearly all the DNA is concentrated in a narrow ring with almost no DNA in the rest of the stain, these effects should be accounted for in the design of ...

Agriculture and tropical conservation: rethinking old ideas

...to cattle pastures. So the standard litany doesn't ring true to them." Vandermeer and Perfecto reviewed studies of biodiversity in the Atlantic coast rainforest of Brazil, a region that is unusual in having areas of tremendous biological variety adjacent to highly developed, industrialized areas. "Th...

Molecular DNA switch found to be the same for all life

...d, because in other functional AAA+ complexes, the ring assemblies are closed. In addition, the architecture indicated that the AAA+ superhelix will wrap coils of the DNA double-helix around its exterior, causing the familiar "spiral staircase" of the DNA to deform as a first step in the separation and u...

APS lecturer shows rare video of 'teacher-student' immune cell interactions in live animal

...bells. Possibly we could manipulate the process to ring the alarm bell for the immune system when it fails to recognize the danger." Technological leap makes it possible Intravital microscopy, invented in the early 19th century, allows scientists to look at the tissues and cells of live animals. The t...

Multi-million pound UK Biobank underway

...ith a freephone number that volunteers and GPs can ring to raise any queries with a study team member. No one is pressured into taking part, and participants can withdraw at any time if they change their minds. The first assessment centre is located in the centre of Altrincham, with appointments continuin...

USC researchers track down the stem cells that create feathers

...nd is that feather stem cells are distributed in a ring configuration around the inner wall of the vase-sh...s so useful as writing implements-leaving behind a ring of stem cells for the creation of the next generation of feathers. "The unique topological arrangem...

How Fruitflies Know It's Time for Lunch

...axons of some of these hug neurons extend into the ring gland, a crucial metabolism and growth organ in flies. Other axons contact the protocerebrum, a structure close to brain centers for learning and remembering odors. A third set of these axons extend to throat muscles—which is surprising because most ...

Scientists observe how a close bond activates the immune system

...rongest when they are physically held in the outer ring of the bull's eye rather than the center. "We locked the receptors in the periphery and saw enhanced signaling over a prolonged period of time. It was quite a surprise," says Dr. Dustin. Researchers had speculated that the concentrated bull's eye s...

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