Sentences with phrase «as the particle size»

«We need to systematically change the parameters of the support and the catalyst itself, such as particle size, surface area, and amount of heteropoly acid catalyst,» said Dr. Jun Liu, who is leading PNNL's Transformational Materials Science Initiative.

Fine - particle TiO2 is manufactured as nanoparticles that are typically 10 — 20 nm in size, and some suppliers promote this as the particle size.

As the particle size increases other colors such as red, green, blue, brown or black may be seen.

As to LDL, the level means nothing as long as the particle size is large / fluffy.

Particle surface area increases as the particle size decreases.

Not exact matches

Nuclear explosions loft this material high into the atmosphere as dust -, salt -, and sand - size particles, and it can take up to 15 minutes to fall to the ground.

In addition, the servomotor - powered gate offers a gentle but precise opening and closing profile which ensures very controlled product feeding to preserve particle size and structure as well as significantly reducing dust emissions.

Your choice of heat exchanger depends on the attributes of the product in question, such as its viscosity and particle size.

Most of this plastic disintegrates into particles smaller than five millimetres, referred to as microplastics, and breaks down further into nanoparticles, which are less than 0.1 micrometre in size.

Some drugs are better administered as a dry - powder inhalant than as a water - soluble compound, but controlling the size of the dry - powder particles has been difficult.

It takes a huge amount of data to describe a star, the precursor of a black hole — from macroscopic properties such as its size and temperature down to the microscopic properties of its constituent particles.

As van der Marel explains: «It's likely that we are looking at a kind of comet factory as the conditions are right for the particles to grow from millimetre to comet sizAs van der Marel explains: «It's likely that we are looking at a kind of comet factory as the conditions are right for the particles to grow from millimetre to comet sizas the conditions are right for the particles to grow from millimetre to comet size.

Earlier, in 2000 and 2002, the craft positioned aerogel collectors on the opposite side of the arm to snare particles of interstellar dust, suspected to be as small as one - tenth the size of comet grains.

Microplastics are defined as plastic particles smaller than 5 millimeters in size.

Aerosol particles have different sizes, as well as chemical and physical properties, all of which determine their climate effects.

In their paper, «Higgs Seesaw Mechanism as a Source for Dark Energy,» Krauss and Dent explore how a possible small coupling between the Higgs particle, and possible new particles likely to be associated with what is conventionally called the Grand Unified Scale — a scale perhaps 16 orders of magnitude smaller than the size of a proton, at which the three known non-gravitational forces in nature might converge into a single theory — could result in the existence of another background field in nature in addition to the Higgs field, which would contribute an energy density to empty space of precisely the correct scale to correspond to the observed energy density.

From their observations, the scientists derived a promising basic concept to specifically adjust the size and structure of platinum particles as a function of the catalytic activity required during operation.

By studying core samples taken from the river delta, the research team, led by Zhen Li of East China Normal University in Shanghai and colleagues, detected patterns and sizes of charcoal to indicate fire distance (small particles can travel farther than 100 meters, whereas larger ones stay put) as well as pollen to deduce the presence of either crops or nonagricultural flora.

Astronomers believe large moonlets up to at least a half - mile in size may hide among the rings, which themselves are only about 30 feet thick; the taller vertical structures visible here could be ring material that «splashes» up when the fine particles of the rings collide with these moonlets, much as water at the sea's edge can splash up and over a rock.

As reported today in the journal Science, the scientists used the approach to image micron - sized battery particles as lithium ions migrate in and out of the particleAs reported today in the journal Science, the scientists used the approach to image micron - sized battery particles as lithium ions migrate in and out of the particleas lithium ions migrate in and out of the particles.

Rooting around in the detritus on his desk, Robert Winglee finds a quarter - sized magnet and waves it inches from his computer monitor, sending ripples of color scattering as light particles are deflected back toward the screen.

«This will enable us to image chemical phases within the smallest available particles, often less than 100 nanometers in size, and still give us the penetrating power to look at large volumes of material, such as thousands of battery particles.

Ring systems, such as the iconic rings around Saturn and Uranus, are composed of particles ranging from centimeters to meters in size.

Because the DNA cages are used as a «mold» to build the polymer particle, the particle size and number of molecular units in the polymer can be precisely controlled, says Sleiman, who holds the Canada Research Chair in DNA Nanoscience.

For the particles to have an effect, the impact must be extremely intense, such as that caused by a firearm or micrometeorites (objects the size of grains of sand capable of hitting satellites at the speed of ten kilometres per second).

«We're busy working on analyzing the infrared data from this special view of the Saturn system,» said Phil Nicholson, a visual and infrared mapping spectrometer team member from Cornell University, Ithaca, N.Y. «The infrared data should tell us more about the sizes of the particles which make up the D, E, F and G rings, and how these sizes vary with location in the rings, as well as providing clues as to their chemical composition.»

The size of the particles coughed onto you matters, as does where they land.

While the results did not detect dark matter particles — known as «weakly interacting massive particles» or «WIMPs» — the combination of record low radioactivity levels with the size of the detector implies an excellent discovery potential in the years to come.

To see how a size disparity would affect the crystalline order and the system's physical properties, Olvera de la Cruz and postdoctoral fellow Zhenwei Yao devised a model system of soft particles, such as functionalized nanoparticles with grafted chains including nucleic acids or thiols.

That makes them of similar size as many viruses, enabling the particles to enter cells by exploiting the same surface proteins that viruses use for this purpose.

Plants release gases that, after atmospheric oxidation, tend to stick to aerosol particles, growing them into the larger - sized particles that reflect sunlight and also serve as the basis for cloud droplets.

The discovery is significant, as micrometre - sized particles are easier and safer to process than nanoparticles.

For example, Andrey Novitsky of the Technical University of Denmark in Lyngby and colleagues in Singapore consider a single spherical particle in a Bessel beam and study primarily how the size and material properties of the particle must be adjusted to produce an attraction, as they reported online 10 November in Physical Review Letters.

When the scientists mixed nanocubes coated with DNA tethers on all six sides with nanospheres of approximately the same size, which had been coated with complementary tethers, these two differently shaped particles did not segregate as would have been expected based on their normal packing behavior.

Such particles could eventually enable astrophysicists to infer properties such as a neutron star's size and the strength of its gravity at its surface.

«Nano - sized mesoporous silica particles have already been established as useful for manipulating individual cells from the inside, but this is the first time that larger particles, in the micron - sized range, are used to create a 3D in vivo scaffold that can recruit and attract tens of millions of immune cells,» said co-lead author Jaeyun Kim, Ph.D., an Assistant Professor of Chemical Engineering at Sungkyunkwan University and a former Wyss Institute Postdoctoral Fellow.

Consequently, the use of bullets that deform or fragment into particles greater than 9 mm in size, such as lead - free bullets from numerous manufacturers, may prevent metal ingestion and poisoning in avian scavengers.

The size and concentration of the particles, as well as the strain of rat used, could all have influenced the results, he says.

Under an alternating voltage, the size of the particles determines how quickly they can change direction as the current reverses, attracting them first to one of the electrodes and then the other.

«The advantage of this approach is that we can map how different synthesis parameters, such as temperature and catalyst particle size, influence how nanotubes form while simultaneously testing the resulting CNT forests for how they will behave in one comprehensive simulation,» Maschmann said.

The scientists used the free - electron laser LCLS at the SLAC National Accelerator Laboratory in the U.S., and employed optics to focus each X-ray pulse to a similar size as one of the virus particles.

The disk, which we see edge on, contains rock and ice fragments ranging in size from objects larger than houses to grains as small as smoke particles.

When we science writers describe string theory, we usually trot out something like this: The theory defines the fundamental constituents of physical reality not as minuscule particles but as shimmying strands of energy less than a trillionth of a trillionth the size of an atom.

The intriguing revelation that 12 pentagonal «defects» convert a planar hexagonal array of any size into a quasi-icosahedral cage explains why some intrinsically planar materials form quasi-crystalline particles, as appears to occur in the case of soot.

AWARE uses multiple radar instruments and a sophisticated lidar system to explore the clouds» many layers, examining properties such as phase and particle size at various altitudes.

The size and composition of the cosmic dust particles suggests they must have melted as they entered the atmosphere at around 12 kilometres per second.

These observations show how the unexpectedly large size of the particles of dust surrounding the star enable it to lose an enormous amount of mass as it begins to die.

Nanoparticle expert Yu Seok Youn and his team have engineered gold particles so that they have the same rodlike shape and size as the virus.

The design space will be determined using parameters such as lipid composition, particle size, and LPS loading.

The soot particles that polluted London's air were similar in size and in their effects on visibility to the particles astronomers often refer to as dust grains, although their origins and compositions differ.