"Microscopic particles" refers to extremely tiny and unseen pieces or particles that can only be observed using a microscope.
Full definition
After months of investigation, the team found the culprit:
microscopic particles of debris from the pumps of the upgraded vacuum system.
It involves injecting gas into the stratosphere, forming
microscopic particles which reflect some of the sun's energy to limit rising sea surface temperatures.
Prather had spent 15 years developing a device that could suck in
microscopic particles from the air and analyze their chemical composition in a few thousandths of a second.
Serrallonga pictured the first humans doing the same with their hand axes, reckoning that the stone tools would show up in the archaeological record, but not the wood, as it would all degrade over time — except
for microscopic particles of silica called phytoliths.
These particles have the ability to get transformed
into microscopic particles once emitted into the atmosphere and hence stands to reason why they are the main culprits.
Air filters use woven fibers that allow air molecules to pass through but
trap microscopic particles such as pollen, mold spores, pet dander, dust mites, and other allergens.
A relatively new technology, duct sealing works by
spraying microscopic particles of sealant into ductwork, where they form airtight bonds over leaks.
Plastics linger for years polluting, collecting other pollutants on their surface and
shedding microscopic particles, which are now found in many water systems and the food chain.
The report identifies several additional significant human - induced forcing mechanisms —
microscopic particles called aerosols, stratospheric and tropospheric ozone, surface albedo (reflectivity) and aircraft contrails — although the influences of these mechanisms are much less certain than those of greenhouse gases.
The researchers found that it was possible to combine the gel with silica nanoparticles —
microscopic particles previously found to stop bleeding — to develop an even more powerful barrier to promote wound healing.
ACE - M - 1 testing will take advantage of the microgravity environment of station to study
how microscopic particles spread out and clump together in gels and creams.
In addition to being subject to the tug of planetary gravity,
microscopic particles orbiting the sun are pushed outward by the pressure of sunlight, dragged inward by their own radiative emissions, and worn down by collisions with other particles.
Professor Matthew Collins, of the University of York, said: «We knew that calculus
preserved microscopic particles of food and other debris but the level of preservation of biomolecules is remarkable.
Secondary organic aerosols (SOAs) are
microscopic particles created when ozone reacts with volatile organic gases such as limonene - the chemical name for the smell of oranges - or its cousin α - pinene, which is part of the smell of pine trees.
«If we go back 10 years and ask what is the most important parameter [to developing a therapeutic particle], people would immediately think of the particle's size and then its surface chemistry,» says University of California, Santa Barbara, chemical engineering professor Samir Mitragotri, who
develops microscopic particles of different shapes and tests their ability to deliver drugs, but was not associated with DeSimone's study.
But electrostatic charging could also occur
between microscopic particles of smog in Titan's air, allowing the particles to glom together, grow and precipitate to its surface.
The preliminary findings of the study are based on an analysis of
microscopic particles collected by NASA's Stardust mission launched in 1999 to collect dust samples from the comet Wild 2 and return them to Earth for study.
Because the AdBlue evaporates more evenly the diesel particulate filter which is designed to trap
microscopic particles doesn't get clogged and stop working correctly.
It's not dogs» hair which trigger allergies, it's actually incredibly tiny protein molecules in their saliva, urine and dander (
microscopic particles continuously shed from their skin).
When the Regional Monitoring Program for Water Quality in San Francisco tested the effluent of eight Bay Area wastewater treatment plants last year, they «found that 80 percent of the microplastics and
other microscopic particles were fibers.»
Several proposals call for
injecting microscopic particles, called aerosols, into the stratosphere, the quiet region of the atmosphere above the troposphere about 18 kilometers up from the equator.
The cancellations in Boston are the result of a worldwide ripple effect after aviation officials over the past weekend had to temporarily shutdown large airports in Ireland, Scotland, and the Netherlands, as well as London's Heathrow Airport — Europe's busiest airport — because of the ash cloud, which poses dangers to aircraft
because microscopic particles can stall a jet engine.
Beijing's air is full of pollutants like sulfur dioxide (SO2), ozone (O3), carbon monoxide (CO), nitrogen dioxide (NO2), and notably, particulate matter (
microscopic particles like those in engine exhaust).
If mineral grains are somehow to form from a supernova, the gas / plasma debris from the supernova must first merge
into microscopic particles.
Metal oxides such as zinc oxide and titanium dioxide are increasingly being used in sunscreens and cosmetics in the form of nanoparticles —
microscopic particles of matter measured on the nanoscale.
There, floating debris — from
microscopic particles of plastic to large pieces like ropes and fishing nets — is carried by currents and accumulates.
A nanoparticle (or nanopowder or nanocluster or nanocrystal) is
a microscopic particle with at least one dimension less than 100 nm.
This is due to
microscopic particles of soot and other pollutants that heighten rainfall, Rosenfeld concludes.