Sentences with phrase «oxide when»

Use natural sun protection that contains zinc oxide when you're going to be outdoors, even during the winter.

This relies on the ability of macrophages, types of white blood cell, to produce nitric oxide when they are exposed to cytokines.

The next step was marking the animals with dots of zinc oxide when they beached at poolside, much as Gallup had marked his chimps.

As Boyd recalls, he then remembered that Robert Millikan, a Nobel Prize - winning physicist and the head of Caltech from 1921 to 1945, also had to contend with removing copper oxide when he performed his famous 1916 experiment to measure Planck's constant, which is important for calculating the amount of energy a single particle of light, or photon, Boyd wondered if he, like Millikan, could devise a method for cleaning his copper while it was under vacuum conditions.

Not exact matches

As the world began to learn in September, when the U.S. Environmental Protection Agency issued a shocking «notice of violation,» the vehicles met emissions standards for dangerous oxides of nitrogen, known collectively as NOx, only when running their paces in an artificial, indoor lab setting.

When sulfur dioxide gets into the atmosphere and meets nitrogen oxides, compounds are formed that lead to acid in the rain.

She did offer the wonderful tip of using zinc oxide to help deflect the sun from highly sensitive areas when directly exposed to high sun for a long period of time - and also to consider the way relate to the sun - spending most of our lives indoors and than binging on sun on our one sunny day - off a week.

When the naturally occurring nitrates in whole beets are converted to nitric oxide in the body, they help support circulatory health and endurance and maintain healthy blood pressure levels.

Another medicinal quality of beets is that when consumed, they increase the amount of nitric oxide in the body.

When exposed to bacteria in the mouth or enzymes in the body, nitrates turn into nitrites, which then either turn into nitric oxide or nitrosamines.

But I really like the zinc oxide and titanium dioxide components and then when the teachers are applying the sun screen, a good real fun is to use about a golf ball size amount for each application.

Diaper rash cream that contains zinc oxide work very well when applied to clean, dry skin.

Make sure you stock up on plenty of diapers — different sizes to accommodate your baby's growth — and a diaper cream with zinc oxide to help prevent diaper rash, which occurs when your baby's skin is exposed to excess moisture for long periods of time.

It is a byproduct which is produced when ethylene oxide, which is a breast carcinogen.

When absorbed by the body, nitrous oxide / oxygen has a calming effect.

That is, oxygen tends to fall out of the air as rust and other mineral oxides rather than linger as a gas, so when it exists in abundance, something — photosynthetic life, in Earth's case — must be constantly replenishing it.

The United States released 6,511 million metric tons of CO2 equivalent in 2016 when CO2, methane, nitrogen oxides and fluorinated gases are added together.

When exposed to nitrous oxide, for example, the tubes became up to 1000 times more conductive.

The window's opacity to visible light and solar energy varies when an electrical current flows between the oxide layers.

The coercivity is low when the oxide is structurally uniform (above and below the MIT) and high when it is maximally disordered in the middle of the transition.

Large amounts of basalt rich in aluminium oxide were also found, which can trigger an eruption when it collides with silica.

They have a gate with a lock made from iron oxide nanoparticles that can be opened when heated with electromagnetic energy.

The key ingredient that makes the batteries rechargeable is a molecule called bismuth oxide which, when mixed into the batteries» zinc electrodes, prolongs the life of devices and allows them to recharge.

We found that the gene in nitrate - utilizing soil bacteria, responsible for the destruction of nitrous oxide, can be regulated when copper is added.

When potent oxygen radical scavengers such as cerium oxide nanoparticles (nanoceria) were combined with a highly charged polymer (polyacrylic acid) and incorporated into extracted chloroplasts using the LEEP process, damage to the chloroplasts from superoxides and other reactive oxygen species was dramatically reduced.

The pollutant that has declined the least is ozone, a hard - to - control noxious gas formed when nitrogen oxides and volatile organic compounds react with sunlight.

Concerns over the Dreamliner kicked off over a decade ago when Boeing decided to create a civil airliner that would be both lighter than any of its previous jets and fly with leaner - burning engines to cut the plane's emissions of CO2 and nitrogen oxides.

Insulating oxides are oxygen containing compounds that do not conduct electricity, but can sometimes form conductive interfaces when they're layered together precisely.

IBM developed a technique for making carbon nanotubes emit light, paving the way for new fiber optics; Harvard scientists figured out how to deposit tiny wires on glass or plastic, opening the door for the development of supercheap computers; and at the University of Central Florida, neuroscientist Beverly Rzigalinski discovered a nanomolecular fountain of youth effect: When Rzigalinski applied cerium oxide nanoparticles to rat neurons in a petri dish, the particles seemed to strip out the free radicals that make tissues age and kept the neurons alive and functioning up to six times their normal life span.

This effect makes the atmosphere act somewhat like a blanket that becomes thicker when amounts of water vapor, carbon dioxide and other greenhouse gases, such as methane and nitrous oxide, increase.

When cerium oxide III is mixed with free radicals, it catalyzes a reaction that effectively defangs the ROS by capturing oxygen atoms and turning into cerium oxide IV.

When adding the reduction agent ammonia formed by e.g. decomposition of urea, nitrogen oxides are converted into harmless nitrogen and water vapor over the catalytic converter.

The explosive force occurs when solid ammonium nitrate decomposes very rapidly into two gases, nitrous oxide and water vapor.

When blended correctly, these materials contain the correct proportions of the various oxides.

High - energy materials, such as metal oxides and silicon anodes, have massive volume changes when lithium ions are injected and extracted from the electrode material.

So, when there is shrinkage, those wraps allow the electrons to reach the iron oxide and continue on the conductive path unabated.

But in crystals of an iron - molybdenum oxide, a team led by Kei - Ichiro Kobayashi at the Joint Research Center for Atom Technology in Tsukuba, Japan, saw a 10 % drop in resistance when they placed the material in a strong magnetic field, considerably more than the one seen in comparable materials.

The opposite phenomenon occurs when platinum and iron - oxide is exposed to an oxygen atmosphere.

«This new ion - assisted manipulation of matter on the tiniest of length scales completely changed the behaviour of the aluminium oxide: when we applied moderate exposure to helium ions, its pores shrank, when we increased exposure to the ions this normally brittle and porous ceramic turned into a superplastic and gained the ability to stretch more than twice without breaking.»

The same process also happens when the surface of the titanium oxide is irradiated with light — electrons are liberated inside the material, and can come to the surface to activate one of the oxygen molecules.

Right now, even these «high - temperature» copper - oxide materials operate as superconductors only when cooled to below -100 degrees Celsius.

According to the U.S. Environmental Protection Agency, the process of manufacturing glass not only contributes its share of greenhouse gas emissions but also generates nitrogen oxides, sulfur dioxide and tiny particulates that can damage lung tissue when breathed in.

And a new study shows that biochar could have an impact on agriculture's other greenhouse gas emission: nitrous oxide, or laughing gas, which is no laughing matter when it comes to climate change.

When sulfur dioxide and nitrogen oxides are released from power plants and other sources, prevailing winds blow these compounds across state and national borders, sometimes over hundreds of miles.

Food production accounts for a third of all greenhouse gas emissions when one tallies those from fossil fuels used in growing, preparing and transporting food; the carbon dioxide released by clearing land for farming and pastures; the methane from rice paddies and ruminant livestock; and the nitrous oxide from fertilizer use.

When they restored normal nitric oxide levels by having mice breathe in the short - lived gas — as patients have done in clinical trials — cell adhesion did not increase when oxygen levels decreaWhen they restored normal nitric oxide levels by having mice breathe in the short - lived gas — as patients have done in clinical trials — cell adhesion did not increase when oxygen levels decreawhen oxygen levels decreased.

Scientists have tried building the electrodes out of common semiconductors such as silicon or gallium arsenide — which absorb light and are also used in solar panels — but a major problem is that these materials develop an oxide layer (that is, rust) when exposed to water.

When applied to photoanodes, the nickel oxide film far exceeded the performance of other similar films — including one that Lewis's group created just last year.

When applied to semiconducting materials such as silicon, the nickel oxide film prevents rust buildup and facilitates an important chemical process in the solar - driven production of fuels such as methane or hydrogen.

Nitrous oxide, for example, does not react with organic tissue and is not a product of organic decomposition, so the concentration in the coffin should be an accurate indication of the concentration in the air when the coffin was sealed.