When scratched with a sharp implement, an exothermic reaction occurs and white fumes are given off as metallic antimony is formed ; when rubbed with a pestle in a mortar, a strong detonation occurs.

The volatile hydride generated by the reaction that occurs is swept into the atomization chamber by an inert gas, where it undergoes decomposition.

An acid – base reaction is a chemical reaction that occurs between an acid and a base.

When the chain reaction occurs in a cell, it can cause damage or death to the cell.

Reactions with chalcogens are highly exothermic ( release energy ); the reaction with oxygen or air occurs at room temperature, and therefore barium is stored under oil or inert gas atmosphere.

Equality of forward and backward reaction rates, however, is a necessary condition for chemical equilibrium, though it is not sufficient to explain why equilibrium occurs.

The reaction with solid water occurs at temperatures as low as.

* Cortical reaction, occurs when a sperm cell unites with the egg's plasma membrane, altering the zona pellucida which prevents other sperm from binding to and entering the egg

This type of reaction occurs, for example, in redox and acid-base reactions.

In contrast to the E1 eliminations, different stereochemical configurations are possible for the reaction product in the E2 mechanism, because the attack of the base preferentially occurs in the anti-position with respect to the leaving group.

It facilitates the cleavage of peptide bonds by a hydrolysis reaction, which despite being thermodynamically favourable occurs extremely slowly in the absence of a catalyst.

The domino effect is a chain reaction that occurs when a small change causes a similar change nearby, which then will cause another similar change, and so on in linear sequence.

When the moisture content evaporates during detonation, cooling occurs, which reduces the temperature of reaction.

Thus in each term ( endothermic & exothermic ) the prefix refers to where heat goes as the reaction occurs.

The dependence of the hydrogen fusion rate on temperature and pressure means that it is only when it is compressed and heated at the surface of the white dwarf to a temperature of some 20 million kelvin that a nuclear fusion reaction occurs ; at these temperatures, hydrogen burns via the CNO cycle.

In engineered nuclear devices, essentially all nuclear fission occurs as a " nuclear reaction " — a bombardment-driven process that results from the collision of two subatomic particles.

A nuclear chain reaction occurs when one nuclear reaction causes an average of one or more nuclear reactions, thus leading to a self-propagating series of these reactions.

This process is much more sensitive to PEB time, temperature, and delay, as most of the " exposure " reaction ( creating acid, making the polymer soluble in the basic developer ) actually occurs in the PEB.

( also known as a condensation reaction ), and usually occurs

As the tonearm tracks the groove, the stylus exerts a frictional force tangent to the arc of the groove, and since this force does not intersect the tone arm pivot, a clockwise rotational force ( moment ) occurs and a reaction skating force is exerted on the stylus by the record groove wall away from center of the disc.

The extent of reaction ξ can be regarded as a real ( or hypothetical ) product, one molecule of which is produced each time the reaction event occurs.

The amount of the food substance required to provoke a reaction in a particularly susceptible individual can be quite small.

The absolute definition of morality in wuxia is understandably a reaction to the real world where it is not quite so clear what or who is purely good or otherwise, consider the context and the historicity of Hong Kong at the time of Louis Cha's works.

For instance, in " The Adventure of the Three Garridebs ", Watson is wounded in a confrontation with a villain ; although the bullet wound proves to be " quite superficial ", Watson is moved by Holmes's reaction:

Consequently, there was only a quite perfunctory reaction.

It also is quite difficult to ensure that such a chain reaction consumes a significant fraction of the fuel before the device flies apart.

Tovey notes that it reproduces the opening of each half of Diabelli's theme quite simply, although the rest is very free, adding that " as a reaction from the impressively thoughtful and calm fughetta it has an intensely humorous effect ".

" Critical reaction was quite positive, with reviewer Stephen Thomas Erlewine calling it " a subtly addicting album.

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

Twin Peaks: Fire Walk with Me received a reaction quite the contrary to the television series.

The nature of the situation was a chemical reaction ; all these musicians and songwriters who had for years harbored dreams of stardom without any outlet for their music gathered in one place and expressed themselves quite colorfully in words and pictures on the site's legendary forum.

This was quite an unusual reaction for Empress Dowager Ci ' an, and the execution of An Dehai is said to have greatly displeased Empress Dowager Cixi.

Since their territoriality can lead to attacks on people, and because their stings are quite painful and can produce a potentially fatal anaphylactic reaction in some individuals, nests in human-inhabited areas may present an unacceptable hazard.

The reaction was phenomenal, and quite unexpected.

This is quite different from the Hollywood use of faces where the close-up was treated as a reaction shot, usually to a piece of dialogue that had just been spoken.

Though very kinetically slow without any catalysts ( most esters are metastable ), pure esters will tend to spontaneously hydrolyse in the presence of water, so when carried out " unaided ", high yields for this reaction is quite unfavourable.

Because of the harsh conditions and the reactivity of the intermediates, this otherwise quite useful reaction tends to be messy, as well as toxic to the health and environment.

No individual result could quite produce the reaction that the return of England's Richard Hill to top flight action, with supporters of both clubs giving Hill a huge ovation on his return to the pitch after 18 months of knee reconstruction, capping off his comeback with a try.

The public reaction to Aubrey's conviction and sentencing in the book is quite similar to those recorded in history.

The international reaction to Cosimo's elevation was bleak, with Maximilian II, Holy Roman Emperor and King Philip II of Spain reacting quite angrily, as Florence was still technically under Imperial suzerainty.

" Terry and Rudge assert that Woolley's latter prediction turned out to be quite accurate, and state that the deletion of the first four words of the quotation by newspaper editors was in reaction to the fact that it was those self-same newspaper's hyperbolic articles, talking about space travel, that Woolley was criticising.

The critical reaction was quite positive.

" The next day, The New York Times ran an editorial in reaction, stating: " It is one thing to be a qualified aviator, and quite another to be a qualified prophet.

In the Tracks of Historical Materialism regards Paris as the new capital of intellectual reaction, quite at odds with others who treat postmodernism as a left heresy.

This development caused quite a negative reaction from the Manila rock scene as most musicians deemed the band unworthy of the break.

The reaction of the media towards the Rammstein band members is quite outlandish, as they are celebrated by the media.