Ozone is not emitted directly ; rather, it is a secondary air pollutant, produced in the atmosphere by the reaction of NO < sub >" x "</ sub > and volatile organic compounds in the presence of sunlight.

The presence of volatile phases in a rock under pressure can stabilize a melt fraction.

The toxic compounds of many species, notably Eucalyptus species, are volatile and flammable and the presence of large amounts of flammable litter, coupled with an herbaceous understorey, encourages fire.

They also serve as operational tools that help in obtaining both the consent of belligerents and the trust of communities for the presence and activities of humanitarian organizations, particularly in highly volatile contexts.

The majority of tropospheric ozone formation occurs when nitrogen oxides ( NOx ), carbon monoxide ( CO ) and volatile organic compounds ( VOCs ), such as xylene, react in the atmosphere in the presence of sunlight.

Sagebrush has a strong pungent fragrance ( especially when wet ) due to the presence of camphor, terpenoids and other volatile oils.

Calcination ( also referred to as calcining ) is a thermal treatment process in presence of air applied to ores and other solid materials to bring about a thermal decomposition, phase transition, or removal of a volatile fraction.

Further testing of the site revealed the presence of volatile and semi-volatile organic compounds, chlorinated compounds including solvents, herbicides, pesticides, dioxins, and " munitions-related compounds " such as nitroaromatics and propellants.

Spectral analysis of the least volatile fraction revealed the presence of krypton.

This analysis might have been able to determine the presence of volatile compounds, such as water.

* Air monitoring meter: electronic device for measuring the presence of one or more chemicals in air, such as oxygen, carbon monoxide, hydrogen sulfide or volatile organic compounds ; may have preset danger threshold alarms.

They are nitrates produced in the thermal equilibrium between organic peroxy radicals by the gas-phase oxidation of a variety of volatile organic compounds ( VOCs ), or by aldehydes and other oxygenated VOCs oxidizing in the presence of NO < sub > 2 </ sub >.

The presence of volatile organic chemicals and water indicates that they have not undergone significant heating (> 200 ° C ) since they formed, and their compositions are considered to be close to that of the solar nebula from which the Solar System condensed.

During normal combustion the volatile compounds created by charring and pyrolysis are consumed at the flames within the fire, while combustion of char can be seen as glowing red coals or embers which burn without the presence of flames.

NO < sub > x </ sub > reacts with volatile organic compounds in the presence of sunlight to form Ozone.

The presence of iron in the olivine or serpentine reduces the efficiency of sequestration, since the iron components of these minerals break down to iron oxide and silica ( reaction 4 ).

* Extractive distillation is defined as distillation in the presence of a miscible, high boiling, relatively non-volatile component, the solvent, that forms no azeotrope with the other components in the mixture.

This is sometimes referred to as spectral coherence, as it is related to the presence of different frequency components in the wave.

Pearl, considered by some to be a mineral because of the presence of calcium carbonate crystals within its structure, would be better considered a mineraloid because the crystals are bonded by an organic material, and there is no definite proportion of the components.

File: Pieter Zeeman. jpg | Pieter Zeeman ( 1865-1943 ): shared the 1902 Nobel Prize in Physics with Hendrik Lorentz for discovering the Zeeman effect ( splitting a spectral line into several components in the presence of a static magnetic field )

Gas chromatography / mass spectrometry analysis of the essential oil revealed the presence of trans-anethole ( 21. 1 %), α-trans-ocimene ( 20. 6 %), limonene ( 12. 4 %), α-pinene ( 5. 1 %), allo-ocimene ( 4. 8 %), methyl eugenol ( 2. 2 %), β-pinene ( 0. 8 %), α-terpinolene ( 0. 5 %), bornyl acetate ( 0. 5 %) and bicyclogermacrene ( 0. 5 %) as the main components.

The presence of SWR can affect monitoring components used to measure power levels impacting the reliability of such measurements.

However, most boil down to two simple components: local loop ( the cost the local incumbent charges to transport the signal from the end user's central office, otherwise known as a CO, to the point of presence, otherwise known as a POP, of the carrier ) and the port ( the cost to access the telephone network or the Internet through the carrier's network ).

Hemes are most commonly recognized in their presence as components of hemoglobin, the red pigment in blood, but they are also components of a number of other hemoproteins.

The relative presence or absence of these components form the subclasses of dark chocolate, milk chocolate, and white chocolate.

The town has been greatly influenced by the presence of Danfoss, a global producer of components for refrigeration and airconditioning, heating and motion control applications, headquartered in the town and founded in 1933.

The presence of all three components characterizes consummate love, the most durable type of love.

In 1900, he left Paris to found the Pasteur Institute in Brussels, and made his discovery that the bacteriolytic effect of acquired specific antibody is significantly enhanced in vivo by the presence of innate serum components which he termed alexine ( but which are now known as complement ).

The Zeeman effect (; ), named after the Dutch physicist Pieter Zeeman, is the effect of splitting a spectral line into several components in the presence of a static magnetic field.

It is analogous to the Stark effect, the splitting of a spectral line into several components in the presence of an electric field.

Some researchers interpret the presence of these woods as indicators that the " healthy homes ", sustainability and environmental components of ancient feng shui should not be easily dismissed.

The melting points are related to the presence of carbon-carbon double bonds in the fatty acids components.

SOC chief Olson said in 2011 that SOCOM " is a microcosm of the Department of Defense, with ground, air, and maritime components, a global presence, and authorities and responsibilities that mirror the Military Departments, Military Services, and Defense Agencies.

In 1997 it acquired Rohr, a maker of jet aircraft engine nacelles ( the aerodynamic structures that surround aircraft engines ), expanding its presence in integrated aircraft components industry.

* Potential stress cracking of plastic components made of polyoxymethylene ( POM ) in the presence of polyalphaolefin ( PAO ).

The presence of the Kansai Science City also makes research and technology core components of Seika's economy.

The alternative hypothesis is that, in the presence of ARCH components, at least one of the estimated coefficients must be significant.

The Stark effect is the electric analogue of the Zeeman effect where a spectral line is split into several components due to the presence of a magnetic field.

Several years on ( roughly 50 from the start of the book ), Triumvir Ilia Volyova and Ana Khouri are on the planet Resurgam and have discovered a new threat ; the Inhibitors, alerted to the presence of humanity during events described in Revelation Space, have begun dismantling several rocky moons across the system and are moving their components towards the gas giant, Roc.

`` Amen '', said the Reverend Doran, grabbing his rifle propped up against a tombstone, `` and now my brethren, it would seem that our presence is required elsewhere ''.

The presence of genuine mimesis in art is marked by the persistence with which the work demands attention and compels valuation even though it is but vaguely understood.

He had also learned to dispute extempore remarkably well, the main evidence for which of course is the presence of his name in the honors list of 1628/29.

Yet you feel the orchestra is near at hand, and the individual instruments have the same firm presence associated with listening from a good seat in an acoustically perfect hall.

The radius is calculated from the mass by assuming spheres of density Af except for the smallest particles, which must have a higher mass density to remain in the solar system in the presence of solar-radiation pressure.

It is characterized by the presence of incompletely developed secondary lobules ; ;

The possibility that the absence or presence of these shunts is species-dependent is therefore inferred.

In the presence of a low iodine intake, thyroglobulin labelled in vivo with Af is found to contain more mono-iodotyrosine than normal, the amounts of di-iodotyrosine and iodothyronines being correspondingly reduced.

-- Glycerinated muscle, in the presence of the physiological agent ( ATP ) responsible for delivering energy to the mechanochemically active proteins of muscle, has been shown to undergo a contraction which is highly sensitive both to temperature and to solvent composition in mixtures of alcohols and water.

One of the greatest problems associated with automatic leveling is establishing a true level in the presence of high-level acceleration noise.

But his is still a simple life relatively free of the female presence or influence, and he must go far, even though he may go fast, for sophisticated pleasures.

Their presence is not as frightening as the discontent which creates their opportunity.

the presence of other members of similar social and economic level is the sufficient condition.

How explicit such factors have been historically is evident in any chronology of restrictive covenant cases or in a review of NAREB's Code of Ethics Article 34 in the Code, adopted in 1924, states that `` a Realtor should never be instrumental in introducing into a neighborhood a character of property or occupancy, members of any race or nationality or any individuals whose presence will clearly be detrimental to property values in that neighborhood ''.

Now to him who is able to preserve you without sin and to set you before the presence of his glory, without blemish, in gladness, to the only God our Savior, through Jesus Christ our Lord, belong glory and majesty, dominion and authority, before all time, and now, and forever.

There is an extraordinary sense of presence in all of these recordings, apparently obtained at least in part by emphasizing the middle and high frequencies.

While both sexes state that kindness is the most preferable trait in a partner there is some evidence that men place less value on this than women and that women may not be more altruistic in presence of an attractive man.

Love confirms others in their freedom, shuns propaganda and masks, assures others of its presence, and is ultimately confirmed not by mere declarations from others, but by each person's experience and practice from within.

Arraignment is a formal reading of a criminal complaint in the presence of the defendant to inform the defendant of the charges against him or her.

One of the defining characteristics of the order is the presence of phytomelan, a black pigment present in the seed coat, creating a dark crust.

Synapomorphies ( a character that is shared by two or more groups through evolutionary development ) include the presence in the plants of oligosaccharide inulin, a nutrient storage molecule used instead of starch ; and unique stamen morphology.

The effectiveness of the technique is demonstrated to a group of VIPs, who watch as Alex collapses before a walloping bully, and abases himself before a scantily-clad young woman whose presence has aroused his predatory sexual inclinations.