A catalyst works by providing an alternative reaction pathway to the reaction product.

Many of his works are generally considered part of the dark romanticism genre, a literary reaction to transcendentalism, which Poe strongly disliked.

The speed of the hydrolysis reaction works as an internal clock for the length of the signal.

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.

Hostile reaction often followed, as paintings were spat upon, riots organized at the opening of works, and political figures denounced modernism as unwholesome and immoral.

With the move to more representational modes of depicting landscape in the 19th century, a reaction set in, and his works were to be the subject of the most disparaging invective.

The opposite idea of " Existence precedes essence " was thus developed in the works of Averroes and Mulla Sadra as a reaction to this idea and is a key foundational concept of existentialism.

The concept of " existence precedes essence ", a key foundational concept of existentialism, can also be found in the works of Averroes, as a reaction to Avicenna's concept of " essence precedes existence ".

Baking powder works by releasing carbon dioxide gas into a batter or dough through an acid-base reaction, causing bubbles in the wet mixture to expand and thus leavening the mixture.

Critical reaction to the album was often mixed ; for example, Rolling Stones Billy Altman concluded that it did not completely accurately reproduce Poe's tension and macabre fear, ending by claiming that " devotees of Gothic literature will have to wait for someone with more of the macabre in their blood for a truer musical reading of Poe's often terrifying works ".

Much of his philosophy is a reaction to the works of Heidegger.

These works were linked by a sometimes overtly political reaction to Thatcherism that explored marginal areas of experience and used vivid vernacular language ( including expletives and Scots dialect ).

They represent a reaction from the high hopes of the author's youth, when wise legislation was assumed to be a remedy for every public ill. Greg was a man of deep moral earnestness of character and was interested in many philanthropic works.

CBS scheduled Norman Corwin's Words Without Music, the first usage of a writer's name in a program title ; the series included two of his more famous works, The Plot to Overthrow Christmas, a fantasy in rhyme, and They Fly Through The Air, an impassioned reaction to the Spanish Civil War.

A U. S. reaction to the cosy conventionality of British murder mysteries was the American hard-boiled school of crime writing ( certain works in the field are also referred to as noir fiction ).

The reaction works also with iodoethane instead of bromoethane.

Artists such as Cy Twombly and Anselm Kiefer routinely make unique, hand crafted books in a deliberate reaction to the small mass produced editions of previous generations ; Albert Oehlen, for instance, whilst still keeping artists ' books central to his practice, has created a series of works that have more in common with Victorian sketchbooks.

This type of control works only if the difference in acidity is large enough and no excess of base is used for the reaction.

Although serious doubts were raised about the Enlightenment prior to the 1790s ( e. g. in the works of Jean-Jacques Rousseau in France and J. G. Hamann in Germany in particular ), the Reign of Terror during the French revolution fueled a major reaction against the Enlightenment, which many writers blamed for undermining traditional beliefs that sustained the ancien regime, thereby fomenting revolution.

Although the issue of whether women are permitted to make up a minyan has been noted in early works, the matter has only come to the fore in past few decades, a reaction to an enhanced role of women in modern society and to the demand for their inclusion in all areas of religious life.

* Native American: including both traditional works and work done under the influence of, or in reaction against, European conventions and training.

It was a reaction against late 19th and early 20th-century Romanticism as embodied in the works of composers such as Richard Wagner and Gustav Mahler who had stretched both musical language and musical form to produce massive works where the limits of tonality were broken.

Furthermore, the exchange would not be expected to be sensitive to trace amounts of impurities because it would not be apt to be a chain reaction since the activation energy for abstraction of chlorine by a chlorine atom would be expected to be too high ; ;

Autosuggestibility, the reaction of the subject in such a way as to conform to his own expectations of the outcome ( i.e., that the arm-rise is a reaction to the pressure exerted in the voluntary contraction, because of his knowledge that `` to every reaction there is an equal and opposite reaction '' ) also seems inadequate as an explanation for the following reasons: ( 1 ) the subjects' apparently genuine experience of surprise when their arms rose, and ( 2 ) manifestations of the phenomenon despite anticipations of something else happening ( e.g., of becoming dizzy and maybe falling, an expectation spontaneously volunteered by one of the subjects ).

Both theories easily describe the first reaction: CH < sub > 3 </ sub > COOH acts as an Arrhenius acid because it acts as a source of H < sub > 3 </ sub > O < sup >+</ sup > when dissolved in water, and it acts as a Brønsted acid by donating a proton to water.

In the second example CH < sub > 3 </ sub > COOH undergoes the same transformation, in this case donating a proton to ammonia ( NH < sub > 3 </ sub >), but cannot be described using the Arrhenius definition of an acid because the reaction does not produce hydronium.

This reaction cannot be described in terms of Brønsted theory because there is no proton transfer.

Someone with a positive tuberculin reaction is not given BCG, because the risk of severe local inflammation and scarring is high, not because of the common misconception that tuberculin reactors " are already immune " and therefore do not need BCG.

However, the law of mass action is valid only for concerted one-step reactions that proceed through a single transition state and is not valid in general because rate equations do not, in general, follow the stoichiometry of the reaction as Guldberg and Waage had proposed ( see, for example, nucleophilic aliphatic substitution by S < sub > N </ sub > 1 or reaction of hydrogen and bromine to form hydrogen bromide ).

Pupil reaction to light is important because it shows an intact retina, and cranial nerve number 2 ( CN II ); if pupils are reactive to light, then that also indicates that the cranial nerve number 3 ( CN III ) ( or at least its parasympathetic fibers ) are intact.

In the catalyzed elementary reaction, catalysts do not change the extent of a reaction: they have no effect on the chemical equilibrium of a reaction because the rate of both the forward and the reverse reaction are both affected ( see also thermodynamics ).

Energy that can be released ( or absorbed ) because of a reaction between a set of chemical substances is equal to the difference between the energy content of the products and the reactants.

Although it was originally presented in reaction to the statements of artificial intelligence researchers, it is not an argument against the goals of AI research, because it does not limit the amount of intelligence a machine can display.

An elementary reaction involves a few molecules, usually one or two, because of the low probability for several molecules to meet at a certain time.

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.

Energy requirements are lower because of the lower kiln temperatures required for reaction, and the lower amount of limestone ( which must be endothermically decarbonated ) in the mix.

Finally, reaction 3 is favorable because it describes the proliferation of OH < sup >–</ sup > ions thus letting a probable reduction of H < sup >+</ sup > ions less favorable an option.

However, he always believed the ball was in the net because of Hunt's reaction – the Liverpool striker was following in as the ball hit the bar and turned to celebrate a goal instead of trying to knock the rebound into the net.

Because of their high reactivity, they must be stored under oil in sealed glass ampoules to prevent reaction with air.

Polymerization of alkenes is a reaction that yields polymers of high industrial value at great economy, such as the plastics polyethylene and polypropylene.

The reaction is thermodynamically favored only at high temperatures.

Combustion in oxygen is a chain reaction where many distinct radical intermediates participate. The high energy required for initiation is explained by the unusual structure of the dioxygen molecule.

This can occur by increasing the entropy of the system, often through the formation of gaseous reaction products, which have high entropy.

With a catalyst, a reaction which is kinetically inhibited by a high activation energy can take place in circumvention of this activation energy.

With the complex sensory reaction to the variety of spices and flavours, a natural high is achieved that causes subsequent cravings, often followed by a desire to move on to hotter curries.

At low pressure, there was enough space between the gas atoms that the ions could accelerate to high enough speeds that when they struck another atom they knocked electrons off of it, creating more positive ions and free electrons in a chain reaction.

As a new type of nuclear reaction, it was proposed to explain reports by experimenters of anomalously high energy generation under certain specific laboratory conditions.

Conversely, factors that favor plate columns are: presence of solids in feed, high liquid rates, large column diameters, complex columns, columns with wide feed composition variation, columns with a chemical reaction, absorption columns, columns limited by foundation weight tolerance, low liquid rate, large turn-down ratio and those processes subject to process surges.

In order for this reaction to occur the power supply should provide at least a potential of 4 V. However, larger voltages must be used for this reaction to occur at a high rate.

The low electronegativity of metals and high electronegativity of non-metals means that the reaction is most favourable between a metal and a non-metal.

If the ions have high enough energy, they can knock atoms out of the material to be etched without a chemical reaction.

Nuclear fission weapons must use an extremely high quality, highly-enriched fuel exceeding the critical size and geometry ( critical mass ) in order to obtain an explosive chain reaction.

In such cases, residual decay heat from the core may cause high temperatures if there is loss of coolant flow, even a day after the chain reaction has been shut down ( see SCRAM ).

This restricts ongoing life to planetary environments where heavy elements are present at high densities, so long as temperatures are sufficient for plausible reaction rates.

Polymerase chain reaction samples may need to be overlaid with a layer of mineral oil to prevent evaporation during the high heat ( 95 ° C ) required to denature DNA.

During the 1980s, perhaps as a reaction to the evening drama series that were gaining high ratings, daytime serials began to incorporate action and adventure storylines, more big-business intrigue, and an increased emphasis on youthful romance.

Turbines with multiple stages may utilize either reaction or impulse blading at high pressure.

This change in speed forces a designer to change from impulse at the base, to a high reaction style tip.

This is high enough to permit a sustained nuclear fission chain reaction to occur, provided other supporting conditions exist.