The reaction is carried out under pressure at a temperature of 200 ° C in the presence of a metallic catalyst.

The decoloration of a solution of bromine in water with dichloromethylene as catalyst is an analytical test for the presence of alkenes:

The steam cracking of alkanes affords a few percent acetylene, which is selectively hydrogenated in the presence of a palladium / silver catalyst.

The presence of the catalyst opens a different reaction pathway ( shown in red ) with a lower activation energy.

* The presence or absence of a catalyst.

DDT does not occur naturally, but is produced by the reaction of chloral () with chlorobenzene () in the presence of sulfuric acid, which acts as a catalyst.

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.

Nitrogen fertilizers are often made using the Haber-Bosch process ( invented about 1915 ) which uses natural gas ( CH < sub > 4 +)</ sub > for the hydrogen and nitrogen gas ( N < sub > 2 </ sub >) from the air at an elevated temperature and pressure in the presence of a catalyst to form ammonia ( NH < sub > 3 </ sub >) as the end product.

This combining process, sometimes called condensation, typically requires the presence of a catalyst.

Foss's presence, and his knowledge, ability, enthusiasm, and imagination may well have been the catalyst bringing hitherto unconnected activities together in Milford's mind, as another new venture similar to the establishment of the overseas branches.

More recently he and Jessop have developed an industrial process for the manufacture of N, N-dimethylformamide from hydrogen, dimethylamine and supercritical carbon dioxide in the presence of < sub > 2 </ sub >( PMe < sub > 3 </ sub >)< sub > 4 </ sub > as catalyst.

Such reactions are usually conducted in the presence of an acid catalyst or UV light.

Only 5-10 mol % of the catalyst in the presence of 3Å molecular sieves ( 3Å MS ) is necessary.

This reaction is very slow in the absence of a catalyst, but quite fast in the presence of the hydroxide ion

The hydrogenation process involves " sparging " the oil at high temperature and pressure with hydrogen in the presence of a catalyst, typically a powdered nickel compound.

Commonly, the natural oils are hydrogenated by passing hydrogen through the oil in the presence of a nickel catalyst, under controlled conditions.

Hydrogenation-to treat with hydrogen-is a chemical reaction between molecular hydrogen ( H < sub > 2 </ sub >) and another compound or element, usually in the presence of a catalyst.

* A catalyst: The presence of a catalyst increases the reaction rate ( in both the forward and reverse reactions ) by providing an alternative pathway with a lower activation energy.

Turtledove approaches the novels ' science fiction scenario with less of a focus on the technological and fantasy elements typically associated with the genre and shows greater concern for the role of more mundane affairs such as the political repercussions of an alliance between the Allied and Axis powers, the impact the presence of alien creatures has on human society, and the ways in which warfare is paradoxically a hindrance to civilization and simultaneously a catalyst for the progress of civilization.

The reactions included in the calculation are only those that actually occur under the given conditions, and not those that might occur under different conditions such as higher temperature or the presence of a catalyst.

For example, if is luminol and is hydrogen peroxide in the presence of a suitable catalyst we have:

A somewhat smaller amount of 1, 1, 1-trichloroethane is produced from the reaction of vinylidene chloride and hydrogen chloride in the presence of an iron ( III ) chloride catalyst:

In the presence of sulfuric acid catalyst, the oxime undergoes the Beckmann rearrangement to give the cyclic amide caprolactam:

Patrick McCarthy describes HCE's wife ALP as " the river-woman whose presence is implied in the " riverrun " with which Finnegans Wake opens and whose monologue closes the book.

He then identifies her as the goddess of the hinge, who is elsewhere known as Cardea, a name Ovid does not use: " By means of her divine presence ( numen ) she opens things that have been closed, and closes things that have been opened.

The presence of the catalyst opens a different reaction pathway ( shown in red ) with a lower activation energy.

On the other hand, the presence of different measures opens a vast potential for many challenging questions and directions of further research.

: The presence of the Sanjiyan in Pai is distinguishable because the normally invisible third eye in her forehead opens when Parvati awakens.

The presence of networks of intelligent systems in our environment opens fascinating application areas but, at the same time, bears the problem of their controllability.

The acclaimed blues rock track, " Gravestones ," opens with " uncharacteristic western acoustics, and then delves into a more fascinating chorus, leaving the wild wild west sound and replacing it with pianos and ethereal presence.

He opens the film can, but 13th Aunt says that B & W film cannot be loaded inside in the presence of sunlight.

He opens it in the presence of George Herbert, 5th Earl of Carnarvon, on November 26.

The eastern doors opens to the presence of lord Rajarajeshwara, represented by the majestic Jyothirlingam.

While cyanobacteria have been traditionally considered algae, recent works usually exclude them due to large differences such as the lack of membrane-bound organelles, the presence of a single circular chromosome, the presence of peptidoglycan in the cell walls, and ribosomes different in size and content from those of the Eukaryotes .< ref >

While clearly attributable to the presence of the opportunistic pathogens of the genus Candida, candidiasis describes a number of different disease syndromes that often differ in their causes and outcomes.

Each Protocol is activated by the presence of a different combination of X-Men and were written by Xavier himself:

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

There are different interpretations of the significance of the Eucharist, but according to the Encyclopædia Britannica " there is more of a consensus among Christians about the meaning of the Eucharist than would appear from the confessional debates over the sacramental presence, the effects of the Eucharist, and the proper auspices under which it may be celebrated.

Typical current conflicts are vastly different, characterised by ' war amongst the people ', the concept of a ' three block war ' and the presence of an asymmetric, 360-degree threat from irregular ( or extremist / terrorist ) combatants.

George Rapp had an eloquent style, which matched his commanding presence, and he was the personality that led the group through all the different settlements.

However, in Japan, union organisation is slightly different due to the presence of enterprise unions, i. e. unions that are specific to a specific plant or company.

For example, a food sample might be analyzed on three different nutrient mediums designed to indicate the presence of " total " bacteria ( conditions where many, but not all, bacteria grow ), molds ( conditions where the growth of bacteria is prevented by, e. g., antibiotics ) and coliform bacteria ( these indicate a sewage contamination ).

During the Epipaleolithic and the Mesolithic, the presence of laminar or geometric microliths serves to date the deposits of different cultural traditions.

Remarkable rock paintings, many found in the Aïr Mountains, dated 3, 500 to 2, 500 BCE, portray vegetation and animal presence rather different from modern expectations.

In the absence of a family history of ADPKD, the presence of bilateral renal enlargement and cysts, with or without the presence of hepatic cysts, and the absence of other manifestations suggestive of a different renal cystic disease provide presumptive, but not definite, evidence for the diagnosis.

The implementations differed substantially, using different native data path widths, presence or absence of microcode, yet were extremely compatible.

The way stalactites form on concrete is due to different chemistry than those that form naturally in limestone caves and is the result of the presence of calcium oxide in concrete.

Its place in small rural communities, for example, when it establishes itself in a local church hall, and absorbs substantial numbers of the population, is very different from its situation in large urban centres, where its presence is marginalised by other social and economic activities.

These secondary peaks, not to be confused with high energy satellites which are discussed later, arise from the presence of the same element in multiple different chemical states on a surface ( i. e. Adsorbate layers ) or from relaxation transitions involving valence band electrons of the substrate.

) Also, Aristotle indicated that the same thing can be the cause of contrary effects-as its presence and absence may result in different outcomes.

Such ‘ reactor-depleted ’ material will have different isotopic ratios from enrichment byproduct DU, and can be distinguished from it by the presence of U-236.

These seeds will give rise to a new generation of plants that may be identical in appearance to those that preceded the flowering, or they may also produce new cultivars with different characteristics, such as the presence or absence of striping or other changes in coloration of the culms.

Performance testing technology employs one or more PCs or Unix servers to act as injectors – each emulating the presence of numbers of users and each running an automated sequence of interactions ( recorded as a script, or as a series of scripts to emulate different types of user interaction ) with the host whose performance is being tested.

At the receiver, due to the presence of the multiple electromagnetic paths, more than one pulse will be received ( we suppose here that the channel has infinite bandwidth, thus the pulse shape is not modified at all ), and each one of them will arrive at different times.