In the presence of oxygen, alkenes burn with a bright flame to produce carbon dioxide and water.

Treating the mixture with sodium cyanide in the presence of free oxygen dissolves the gold.

Caesium is a very soft ( it has the lowest hardness of all elements, 0. 2 Mohs ), very ductile, silvery-white metal, which develops a silvery-gold hue in the presence of trace amounts of oxygen.

Facultative anaerobe can tolerate anaerobic and aerobic condition, however an obligate anaerobe would die in presence of even trace levels of oxygen.

The iron chemistry in this previous classical model was elegant, but the required presence of the required diamagnetic high-energy singlet oxygen was never explained.

Hemoglobin's oxygen-binding capacity is decreased in the presence of carbon monoxide because both gases compete for the same binding sites on hemoglobin, carbon monoxide binding preferentially in place of oxygen.

The presence of iron as Fe < sup > 3 +</ sup > and Fe < sup > 2 +</ sup > helps understand oxygen fugacity, which in turn is a significant factor in petrogenesis.

This process of cellular respiration, also known as aerobic respiration, is dependent on the presence of oxygen.

Many bacteria cease production of the enzyme in the presence of oxygen.

At even higher low earth orbit altitudes atomic oxygen is a significant presence and a cause of erosion for spacecraft.

In the presence of water and oxygen ( or simply air ), some elements — sodium

It is oxidized ( in a sense " burnt ") by heating with oxygen in the presence of a catalyst such as platinum with 10 % rhodium, to form nitric oxide and water.

In colloquial usage, the term is applied to red oxides, formed by the reaction of iron and oxygen in the presence of water or air moisture.

Pyrolysis of fluoropolymers, e. g. teflon, in presence of oxygen yields carbonyl fluoride ( which hydrolyzes readily to HF and CO < sub > 2 </ sub >); other compounds may be formed as well, e. g. carbon tetrafluoride, hexafluoropropylene, and highly toxic perfluoroisobutene ( PFIB ).

Thorium monoxide has recently been produced through laser ablation of thorium in the presence of oxygen.

Using argon bubbles in sulfuric acid, their data show the presence of ionized molecular oxygen O < sub > 2 </ sub >< sup >+</ sup >, sulfur monoxide, and atomic argon populating high-energy excited states, which confirms a hypothesis that the bubbles have a hot plasma core.

This process must be done in the presence of oxygen.

Among these differences were younger formation ages, a different oxygen isotopic composition, the presence of aqueous weathering products, and some similarity in chemical composition to analyses of the martian surface rocks in 1976 by the Viking landers.

This is most often done by looking for two peaks that due to the presence of carbon and oxygen.

Type I muscles are absolutely necessary for aerobic exercise because they rely on the presence of oxygen in order to work.

Type II muscles are needed for anaerobic exercise because they can function without the presence of oxygen.

Oxidation by oxygen in the presence of heterogeneous catalysts:

* Y < sub > 2 </ sub > O < sub > 3 </ sub >: Eu phosphors under electron bombardment in presence of oxygen form a non-phosphorescent layer on the surface, where electron-hole pairs recombine nonradiatively via surface states.

Because superoxide is toxic, nearly all organisms living in the presence of oxygen contain isoforms of the superoxide scavenging enzyme, superoxide dismutase, or SOD.

* Aerotolerant organisms can survive in the presence of oxygen, but they are anaerobic because they do not use it as a terminal electron acceptor.

Obligate anaerobes may use fermentation or anaerobic respiration. Aerotolerant organisms are strictly fermentative. In the presence of oxygen, facultative anaerobes use aerobic respiration ; without oxygen, some of them ferment ; some use anaerobic respiration.

* aerobic metabolism-the process of cellular respiration that occur in the presence of oxygen

This river has gained recent scientific interest due to the presence of extremophile aerobic bacteria that dwell in the water.

Insufficient oxygen ( environmental hypoxia ), often caused by the decomposition of organic matter, may occur in bodies of water such as ponds and rivers, tending to suppress the presence of aerobic organisms such as fish.

Amethyst is a purple variety of quartz ( SiO < sub > 2 </ sub >) and owes its violet color to irradiation, iron impurities ( in some cases in conjunction with transition element impurities ), and the presence of trace elements, which result in complex crystal lattice substitutions.

However, the presence of a vigorous population of Celtic lineage, principally of Irish origin, has supported the creation of other celebrations of beer, often for marketing purposes, such as Saint Patrick's Day ( Día de San Patricio ), patron of Ireland, which is celebrated with abundant libations.

Bodyguards act as a shield for the potential target, keeping lookout for potential attackers ( sometimes in advance, for example on a parade route ), and putting themselves in harm's way — both by simple presence, showing that physical force is available to protect the target, and by shielding the target during any attack.

Further separation was carried out in the presence of a citric acid / ammonium buffer solution in a weakly acidic medium ( pH ≈ 3. 5 ), using ion exchange at elevated temperature.

Russian loans are distinguished from Old Bulgarian ones on the basis of the presence of specifically Russian phonetic changes, as in оборот ( turnover, rev ), непонятен ( incomprehensible ), ядро ( nucleus ) and others.

The presence of Roman forces in the Danube delta was seen as a major threat by all the neighbouring transdanubian peoples: the Peucini Bastarnae, the Sarmatians and, most importantly, by Burebista ( ruled 82-44 BC ), king of the Getae.

In the presence of " communication noise " on the transmission channel ( air, in this case ), reception and decoding of content may be faulty, and thus the speech act may not achieve the desired effect.

The Great Uprising of 1598 swept all Spanish presence south of the Bío-Bío River except Chiloé ( and Valdivia which was decades later reestablished as a fort ), and the great river became the frontier line between Mapuche lands and the Spanish realm.

Technology companies ( including telecom and semi-conductor ) ( now IT sector companies also ) tend to have a Chief Technology Officer ( CTO ), while companies with a strong Information Technology ( IT ) presence have a Chief Information Officer ( CIO ).

Others believe it was a corrupted term of " Chilango ", meaning an inhabitant from Mexico City or Central Mexico ( i. e. the highland states of Mexico ( state ), Jalisco, Puebla ( state ) and Michoacán ); and even from the term " Chileno " by the Chilean presence in mid 19th-century California, when miners from Chile arrived in the California Gold Rush ( 1848 – 51 ).

Among these changes are several involving the quality of her cervical mucus: the sensation it causes at the vulva, its elasticity ( Spinnbarkeit ), its transparency, and the presence of ferning.

These forces arise from the presence of the body in force fields, e. g. gravitational field ( gravitational forces ) or electromagnetic field ( electromagnetic forces ), or from inertial forces when bodies are in motion.

In particular, it could be confused with the southern toad ( Bufo terrestris ), which can be distinguished by the presence of two bulbs in front of the parotoid glands.

Direct contempt is an unacceptable act in the presence of the judge ( in facie curiae ), and generally begins with a warning, and may be accompanied by an immediate imposition of punishment.

Those who have accepted Jesus as their personal saviour will be saved and live in God's presence in the Kingdom of Heaven, those who have not accepted Jesus as their saviour, will be cast into the Lake of Fire ( eternal Hell or simply annihilated ), see for example The Sheep and the Goats.

In the early 1960s, the UK was withdrawing its military presence from the Indian Ocean area, not including the base at RAF Gan to the north of Diego Garcia in the Maldives ( which remained open until 1976 ), and agreed to permit the US to establish a Naval Communication Station on one of its island territories there.

In the 1950s, the endogenous production of psychoactive agents was considered to be a potential explanation for the hallucinatory symptoms of some psychiatric diseases as the transmethylation hypothesis ( see also adrenochrome ), though this hypothesis does not account for the natural presence of endogenous DMT in otherwise normal humans, rats and other laboratory animals.

Larger amounts of radioactive material were later isolated from coral debris of the atoll, which were delivered to the U. S. The separation of suspected new elements was carried out in the presence of a citric acid / ammonium buffer solution in a weakly acidic medium ( pH ≈ 3. 5 ), using ion exchange at elevated temperatures ; fewer than 200 atoms of einsteinium were recovered in the end.

Moses goes up the mountain into the presence of God, who pronounces the Covenant Code ( a detailed code of ritual and civil law ), and promises Canaan to them if they obey.

Esther was terrified of this ( she had not been called to the king in 30 days ), so she and her maid-servants and her people the Jews of Persia fasted earnestly for three days before she built up the courage to enter the king's presence.

One of the most famous Imperial coronation ceremonies was that of Napoleon, crowning himself Emperor in the presence of Pope Pius VII ( who had blessed the regalia ), at the Notre Dame de Paris | Notre Dame Cathedral in Paris. The painting by Jacques-Louis David | David commemorating the event is equally famous: the gothic cathedral restyled Empire ( style ) | style Empire, supervised by the Letizia Ramolino | mother of the Emperor on the balcony ( a fictional addition, while she had not been present at the ceremony ), the pope positioned near the altar, Napoleon proceeds to crown his then wife, Joséphine de Beauharnais as Empress.

Today, state local presence on mainland Finland is provided by 6 regional administrative agencies ( aluehallintovirasto, avi ), and 15 Centres for Economic Development, Transport and the Environment ( elinkeino -, liikenne-ja ympäristökeskus, ely-keskus ).