Sentences with phrase «microscopic structures»

There are two microscopic structures that are characteristically found in the brains of Alzheimer's patients: plaques and neurofibrillary «tangles.»

coccoliths: Microscopic structures of varying shape and size that are made of calcite, are secreted by calcareous nannoplankton, and are found in marine deposits from the Triassic period to the Recent.

At the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL), research performed with collaborators from Princeton University and the Institute for Advanced Computational Science at the State University of New York at Stony Brook has shown how plasma causes exceptionally strong, microscopic structures known as carbon nanotubes to grow.

Microscopic structures experience friction because of the minute attractive forces that exist between molecules.

The energy of impacts that create such craters can be high enough to melt rock; these melts cool rapidly, forming impact glass — a smooth, dark rock, similar to its volcanic cousin, obsidian — which contains various microscopic structures and crystals.

The 2.52 billion - year - old sulfur - oxidizing bacteria are described by Czaja as exceptionally large, spherical - shaped, smooth - walled microscopic structures much larger than most modern bacteria, but similar to some modern single - celled organisms that live in deepwater sulfur - rich ocean settings today, where even now there are almost no traces of oxygen.

Researchers have discovered microscopic structures in the feathers of Humboldt penguins that keep them from icing up — and that could lead to similarly ice - resistant materials.

While some engineers are dragging solar energy into the big time, others are getting small: They have hit upon a novel phenomenon that creates an electric current in nanotubes, hollow microscopic structures made of carbon atoms.

Scientists at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and NASA are using X-rays to explore, via 3 - D visualizations, how the microscopic structures of spacecraft heat shield and parachute materials survive extreme temperatures and pressures, including simulated atmospheric entry conditions on Mars.

«Linking observable properties, such as viscosity to microscopic structures, is what physical chemistry is all about,» co-lead author Hajime Tanaka says.

Other potential applications for sasers include detecting defects in microscopic structures and improving signal processing in semiconductor chips, the scientists say.

An original master gecko adhesive mold with millions of microscopic structures is made in a clean room using a photolithography process.

The best idea so far has been carbon nanotubes — microscopic structures that can pack away large quantities of hydrogen at normal pressure within a relatively small space.

On the scale of microscopic structures, we are virtually blind.

Using the new methods of micromachining, which borrow technology for making computer chips to carve out and build up microscopic structures on silicon wafers, Peter Gammel and his colleagues at Bell Labs / Lucent Technologies reduced three of the critical devices of a cell phone to Lilliputian size that will allow all the components of a phone to be constructed on a single chip.

Richard Prum and colleagues deduced the dinosaur's feather colors by analyzing fossilized microscopic structures called melanosomes, which impart color.

«Recipe book for colloids: Correlation between microscopic structures and macroscopic properties.»

In findings published online in the Journal of Applied Physics, Charles Swanson and Igor Kaganovich report that applying microscopic structures that resemble feathers and whiskers to the surfaces inside these machines keeps them operating at peak performance.

Scientists are learning to custom - design matter by assembling molecules into microscopic structures such as spheres, tubes, and lattices.

We research how the microscopic structure of food and how food is processed affect the quality of everyday food products.

In the 1800s biologists found they could see the microscopic structure of the body more clearly if they injected tissues with special dyes.

But he had suspected that mushroom mycelium could function as a natural filter the first time he saw its microscopic structure.

The Osaka team previously combined two different types of transition - metal disilicides to form a microscopic structure with alternating layers of different alloy crystal.

So scientists decided to look at the microscopic structure of hair.

For example, he is using data from AFLOWlib to study why some alloys can form metallic glass — a peculiar form of metal with a disordered microscopic structure that gives it special electric and magnetic properties.

«We have made, by far, the most precise extraction to date of a key property of the quark - gluon plasma, which reveals the microscopic structure of this almost perfect liquid,» says Xin - Nian Wang, physicist in the Nuclear Science Division at Berkeley Lab and managing principal investigator of the JET Collaboration.

Francesco Panerai of Analytical Mechanical Associates Inc., a materials scientist leading a series of X-ray experiments at Berkeley Lab for NASA Ames Research Center, discusses a 3 - D visualization (shown on screens) of a heat shield material's microscopic structure in simulated spacecraft atmospheric entry conditions.

«In order to understand how a system chooses its rearrangement scenario,» said Douglas Durian, professor of physics and astronomy at the University of Pennsylvania, «we must make connection with the underlying microscopic structure.

Specifically, in this work he has applied geometric structures similar to those of a crystal or graphene layer, not typically used to describe black holes, since these geometries better match what happens inside a black hole: «Just as crystals have imperfections in their microscopic structure, the central region of a black hole can be interpreted as an anomaly in space - time, which requires new geometric elements in order to be able to describe them more precisely.

The process is then followed by high temperature activation annealing (about 600 to 900 degrees Celsius) to form a honeycomb lattice of carbon atoms, a typical microscopic structure of graphene.

By studying the microscopic structure of the eggs, Dr. Varricchio and I were able to determine that the animal buried its eggs in a vegetation mound or nested in a humid environment - more like some reptiles than most open - nesting modern birds.

The microscopic structure of tissue.

The cylindrical chamber has grips that serve like a vice to exert pressure on meteorite samples, and X-ray imaging can study how this compression, in combination with heat and pressure, affects their microscopic structure.

He added, «One of the tricky parts is understanding how meteorites fracture at the microscopic level, and how the material will eventually burst in the atmosphere,» as meteorites have a complex microscopic structure compared to ordinary rocks and behave in different ways under stress.

We research how the microscopic structure of food and how food is processed affect the quality of everyday food products.

However, any imperfection in the microscopic structure of materials can severely affect the performance of the semiconductor devices.

Nucleolus is the term for the microscopic structure inside the nucleus.

Researchers in Uppsala together with colleagues from Lund as well as Namibia, Botswana, France, and the USA have studied the microscopic structure of aggregates formed with the protein.

Not exact matches

Looking back on it, I can definitely see the similarities in terms of what it takes to envision, manage, and build complex structures, whether that's accomplished on the enormous scale of a city or on the microscopic level of a semiconductor chip with billions of transistors.

This year, though, a team from Lawrence Livermore National Laboratory has developed an approach that uses a regular laser - sintering printer to control the microscopic grain structure of the metal.

Microscopic, short - lived structures of this sort are possible, as are large ones with long characteristic time - scales.

Although we can articulate how ambiguity and how commitment structure each phase of the microscopic process by which an actual occasion realizes itself, we must also spell out just how ambiguity and commitment structure the macrocosmic process of commitment that structures ordinary experience, the moral life, social existence, responsibility for our past acts.

Seriously, when you start getting down to a microscopic level and looking at atoms and molecules and the structures of cells, the world changes.

Pan, Schweitzer and their team used both scanning and transmission electron microscopy to get microscopic details of the feather's surface and its internal structure.

Ahlberg's team instead looked at a single specimen of Psarolepis, slicing through the jawbone, skull bones, and scales to get a microscopic peek at their internal structure and so identify what they were made of.

This special issue addresses modern developments in controlling and manipulating light: how light - based technologies are shrinking and becoming faster (Koenderink et al., p. 516); how recent theoretical developments in the manipulation of light are being implemented to provide materials with properties not available in nature (Pendry et al., p. 521); how the quantum properties of light are being exploited in new technologies (Walmsley, p. 525); and how new light sources are coming online that can probe the structure of matter on spatial and time scales that provide an exquisitely detailed picture of our microscopic world (Miao et al., p. 530).

Prof. Peters with his research team are now developing a model that calculates the properties and behaviour of snow masses under high and low strain rates based on the structure of microscopic snow particles.

«At the very microscopic level,» he says, «we have developed techniques like two - photon microscopy, which allows extremely detailed examinations of structures and processes within cells.»

But it's only because it's on the microscopic level that this structure can overcome the problem of maintenance: the molecules that control the wheel and axle reach it by diffusing through the cell's cytoplasm.

The researchers, including Stanford's Schnitzer, used the same microscopic technique as Dulac's team but implanted the lens in the ventromedial hypothalamus, an evolutionarily ancient structure involved in social behavior.