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.
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.
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.
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 performanc
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 performanc
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.
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).
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.
In the 1800s biologists found they could see the
microscopic structure of the body more clearly if they injected tissues with special dyes.
What's more, this is the first time that scientists have demonstrated negative thermal expansion
in all three dimensions, rather than just two, for
structures with
microscopic architecture, the team reports this month
in Physical Review Letters.
From the
in vitro reconstituted Rad3 - Rad26 complex, small - angle X-ray scattering and electron
microscopic studies, it is possible to model the quaternary
structure and thus bring us closer to a mechanistic understanding Rad3 - Rad26 DNA repair apparatus.
An original master gecko adhesive mold with millions of
microscopic structures is made
in a clean room using a photolithography process.
Other potential applications for sasers include detecting defects
in microscopic structures and improving signal processing
in semiconductor chips, the scientists say.
«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.
Using various
microscopic imaging approaches, the scientists found that the unique spatial vision
in the scallop is achieved through the mirror's layered
structure located at the back of each eye, which is tiled with a mosaic of square - shaped crystals arranged and fine - tuned to reflect wavelengths of light that penetrate its habitat.
Their paper, published online today
in the Journal of Archaeological Science, establishes that when the body is deprived of vitamin D, permanent
microscopic abnormalities form
in the layers of dentin, the tooth
structure under the enamel, creating an ongoing record that can later be read like the rings of a tree.
To use this motion - sensing technique
in a practical device, Aksyuk and Roxworthy embedded the gold nanoparticle
in a
microscopic - scale mechanical
structure — a vibrating cantilever, sort of a miniature diving board — that was a few micrometers long, made of silicon nitride.
«
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.
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.
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.
Clay minerals can not form unless there is water available — it is an essential ingredient
in their
microscopic crystalline
structure.
Because neutrons are
microscopic magnets that carry no charge, they can be used to interact with and excite other magnetic particles
in the system without compromising the integrity of the material's atomic
structure.
The bristle - like
structure of the keratin
in a toe pad helps it to stick — each pad is covered with
microscopic pillars, which then branch out at the tips into even smaller
structures.
By joining forces with Professor Wim Versées at the VIB research center for structural biology, the scientists were able to figure out the three - dimensional
structure of Skywalker, making it possible to study the protein
in microscopic detail.
They employed an advanced
microscopic technique called
in vivo two - photon imaging that allows the analysis of
structures as small as a thousandth of a millimetre
in the living brain.
This week,
in a presentation at the annual meeting of the Society for Neuroscience and
in a paper
in Brain
Structure and Function, scientists present the first
microscopic study of neurons
in the cerebral cortex of the African elephant.
Twisted stalks were then observed using
microscopic and spectroscopic techniques, 1) to determine whether
structures are preserved and 2) to characterize their mineral and organic composition and 3) to provide spectroscopic signatures that could be useful for microfossil search
in the rock record.
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.
Microfluidic devices are tiny chips that can sort out disease biomarkers, cells and other small
structures in samples like blood by using
microscopic channels incorporated into the devices.
«Cellular
structures have been visualized
in many
microscopic studies.
In 100 characters: Well - structured microscopic pyramids grown in solution could change batteries, manufacturing @PNNL
In 100 characters: Well -
structured microscopic pyramids grown
in solution could change batteries, manufacturing @PNNL
in solution could change batteries, manufacturing @PNNLab
The latest breakthrough
in superconductors, which will be published March 20
in Science, answers a key question on the
microscopic electronic
structure of cuprate superconductors, the most celebrated material family
in our quest for true room - temperature superconductivity.
Discerning the
structure of
microscopic biological agents like viruses allows them to be studied and understood
in ways not possible by other means.
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.
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.
«This accurate local
structure is the important piece
in relating the
microscopic to macroscopic, or intrinsic properties of the ions
in solution to collective properties,» said Mundy, who led the studies at PNNL.
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.
There are two
microscopic structures that are characteristically found
in the brains of Alzheimer's patients: plaques and neurofibrillary «tangles.»
However, any imperfection
in the
microscopic structure of materials can severely affect the performance of the semiconductor devices.
Increased levels of candida often initiate the proliferation of long root - like
structures (mycelia and rhizoids) that penetrate the mucosal membranes, creating
microscopic breaks
in the normal mucosal boundary of the gastrointestinal tract.
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.
If a cause isn't found, a renal biopsy can be taken for histopathology so that types of cells and
structure of the kidney can be analysed on a
microscopic scale which may aid
in the diagnosis; however, the renal biopsy isn't always reliable.
These series of drawings and paintings also depict
structures that occur
in nature at a level hidden to the naked eye, but these images of the
microscopic are now also used as building blocks to create a composition to which they are conceptually related.
Using the shapes of diseases and cures, maps of the universe, or the molecular
structure of pollutants —
in short,
microscopic or macroscopic «landscapes» — it depicts a physical reality that is invisible to the naked eye.
Neto's earth - toned crocheted
structures are both animalistic and reminiscent of
microscopic organisms
in form, a strange duality that causes the works to feel like indigenous products or abodes from a parallel universe, one where Western colonization never infected native culture, allowing the tribes to continue to develop culturally and technologically on their own.
This site tends to focus on tiny residential
structures —
microscopic pads that people are supposed to live
in.
Protozoan species of the genus Cryptosporidium, such as Cryptosporidium hominis and C. parvum, can cause diarrhea
in human hosts who have ingested as few as 10
microscopic oocysts (egglike
structures that are made of chitin, the same protein that forms the exoskeletons of ants and other insects) contained
in feces or contaminated water.