noun
definition
An emoji used to express a reaction to a post on social media.
example
Sad reacts only
verb
definition
To act or perform a second time; to do over again; to reenact.
definition
To return an impulse or impression; to resist the action of another body by an opposite force
example
Every body reacts on the body that impels it from its natural state.
definition
To act upon each other; to exercise a reciprocal or a reverse effect, as two or more chemical agents; to act in opposition.
definition
To cause chemical agents to react; to cause one chemical agent to react with another.
Examples of reacts in a Sentence
It is a most important synthetic reagent; with sodium or sodium ethylate it forms sodio-malonic ester, which reacts readily with alkyl halides, forming alkyl malonic esters, which are again capable of forming sodium derivatives, that by further treatment with alkyl halides yield the di-alkyl malonic esters.
Boron and iodine do not combine directly, but gaseous hydriodic acid reacts with amorphous boron to form the iodide, BI 31 which can also be obtained by passing boron chloride and hydriodic acid through a red-hot porcelain tube.
It reacts most energetically with many organic compounds, removing the elements of water in many cases and leaving a carbonized mass.
The acid is considered to possess the structure 0 2 S(SH) (OH), since sodium thiosulphate reacts with ethyl bromide to give sodium ethyl thiosulphate, which on treatment with barium chloride gives presumably barium ethyl thiosulphate.
Potassium cyanide reacts with this acid to form the corresponding dinitrile, which is converted by hydrochloric acid into citric acid.
In some instances it reacts as a reducing agent, e.g.
The aldehyde group reacts with hydrocyanic acid to produce two stereo-isomeric cyanhydrins; this isomerism is due to the conversion of an originally non-asymmetric carbon atom into an asymmetric one.
The aldehyde group also reacts with phenyl hydrazine to form two phenylhydrazones; under certain conditions a hydroxyl group adjacent to the aldehyde group is oxidized and glucosazone is produced; this glucosazone is decomposed by hydrochloric acid into phenyl hydrazine and the keto-aldehyde glucosone.
It amounts toa new and unprecedented factor in organic development, external to the organism and yet produced by the activity of the organism upon which it permanently reacts.
Its ethyl ester reacts with hydrazine to form hippuryl hydrazine, C,H 5 CO NH CH 2 CO NH NH 2, which was used by Curtius for the preparation of azoimide.
The healthy bone marrow reacts with remarkable rapidity to the demand for more blood cells which may be required by the organism; its reactions and variations in disease are very striking.
The oil separates from the fat-cells and is found lying free, while the sulphuretted hydrogen evolved as one of the products of putrefaction reacts upon the iron of the blood and throws down a precipitate of sulphide of iron, which in course of time imparts to the limb a range of colour commencing in green and terminating in black.
Thus it is laid down in large quantity in cirrhosis of the liver, kidney or lung, and reacts upon these organs by contracting and inducing atrophy.
This pigment is of a light yellow colour, and contains a fatty substance that reacts to the fat-staining reagents.
The latter reacts with chlorine to give silicon nonyl-chloride Si(C2H5)3 C2H4C1, which condenses with potassium acetate to give the acetic ester of silicon nonyl alcohol from which the alcohol (a camphor-smelling liquid) may be obtained by hydrolysis.
The chlorine reacts with the caustic soda, forming sodium hypochlorite, and this in turn, with an excess of chlorine and at higher temperatures, becomes for the most part converted into chlorate, whilst any simultaneous electrolysis of a hydroxide or water and a chloride (so that hydroxyl and chlorine are simultaneously liberated at the anode) also produces oxygen-chlorine compounds direct.
The poison is a clear, pale-yellow fluid which reacts acid, and contains about 30% of solids, but this varies according to the state of concentration.
The pupil remains contracted and reacts to light.
Every living organism reacts to its environment; if the reaction is unfavourable, disability leading to ultimate extinction is the result.
With iodine it reacts to form nitrogen iodide.
Benzene diazonium hydroxide, although a strong base, reacts with the alkaline hydroxides to form salts with the evolution of heat, and generally behaves as a weak acid.
It reacts with carbonyl compounds, giving semi-carbazones, and in consequence is frequently used for characterizing such substances.
Cold concentrated nitric and sulphuric acids are without action on the metal, but it reacts rapidly with dilute nitric and hydrochloric acids.
When this takes place in an aqueous solution, the alkaline metal at once reacts with the water, so that a solution of an alkaline hydrate is formed while hydrogen escapes.
Cyanogen iodide and iodine monoand tri-chloride effect similar decompositions with simultaneous liberation of iodine; sulphuric acid reacts slowly, forming nickel sulphate and liberating hydrogen and carbon monoxide.
Hydrochloric and hydrobromic acids are without action; hydriodic acid only reacts slowly.
It contains within itself this modifying critical faculty which reacts upon and arranges the sense-given presentations.
The Oecumenical Patriarch is, of course, officially the superior; but the Russian Church is numerically by far the greatest, and the tendency to regard Russia as the head, not only of the Slav races, but of all orthodox nations, inevitably reacts upon the church in the form of what has been called pan-Orthodoxy.
With ammonia it reacts to form di- and triacetoneamines.
It reacts with sulphuric acid only at high temperatures, yielding a sulphonic acid.
It reacts with the caustic alkalis to form selenites, and combines directly with hydrocyanic acid.
The sciences may be said to furnish philosophy with its matter, but philosophical criticism reacts upon the matter thus furnished, and transforms it.
Hydrobromic acid reacts with metallic oxides, hydroxides and carbonates to form bromides, which can in many cases be obtained also by the direct union of the metals with bromine.
It slowly reacts with cold water to form phosphorous acid; but with hot water it is energetically decomposed, giving much red phosphorus or the suboxide being formed with an explosive evolution of spontaneously inflammable phosphoretted hydrogen; phosphoric acid is also formed.
Ammonia also reacts immediately, giving phosphorus diamide, P(OH)(NH2)2, and the corresponding ammonium salt.
The first is formed when 30% hydrogen peroxide reacts with phosphorus pentoxide or metaor pyrophosphoric acids at low temperatures and the mixture diluted with ice-cold water.
Though the Alexandrian idea largely determines the evangelist's treatment of the history, the history similarly reacts on the idea.
But its chief technical application depends upon the formation of sulphonic acids when it reacts with aromatic hydrocarbon residues; these compounds being important either as a step towards the preparation of hydroxy-compounds, e.g.
The NO 2 (or NO + 0) reacts upon SO 2 + H20, forming SO 5 NH 21 which, being extremely unstable, is at once oxidized to SO 5 NH (nitroso-sulphuric acid).
The solution of arsenious oxide in water reacts acid towards litmus and contains tribasic arsenious acid, although on evaporation of the solution the trioxide is obtained and not the free acid.
An improved method of preparation was found in the use of hippuric acid, which reacts with hydrazine hydrate to form hippuryl hydrazine, C 6 H 5 [[Conh Ch 2 Conh Nh]] 2, and this substance is converted by nitrous acid into diazo-hippuramide, C 6 H 5 [[Conh Ch 2 Co Nh N 2.0h]], which is hydrolysed by the action of caustic alkalis with the production of salts of hydrazoic acid.
A significant fraction of the oxy radical also reacts via hydrogen atom abstraction from the added reagent.
Then the hydrogen chloride produced reacts with excess ammonia to give ammonium chloride.
For example, ammonia reacts with HBr to give ammonium bromide, NH 4 + Br - .
The phosphorus in solution reacts with the molybdate ion to produce a blue coloration whose intensity is directly proportional to the concentration of phosphorus.
It reacts with moisture to form hydrogen fluoride, a highly corrosive acid.
The Probability (a drunk driver reacts positively) is 36 / 40.
The plaque reacts with food, turning sugar into acid, which then dissolves the enamel on your teeth.
The chemical reacts with the water to produce a fluffy white mass called floc.
The steam cracker reacts steam with heavy gas oil.