What are reactants?

Some articles on reactants, reactant:

Membrane Reactor
... combines a catalyst-filled reaction chamber with a membrane to add reactants or remove products of the reaction ... tasks Separation Selective extraction of reactants Retention of the catalyst Distribution/dosing of a reactant Catalyst support (often combined with distribution of reactants) Membrane reactors are an example ...
Determination Of Equilibrium Constants - Computational Methods - The Chemical Model
... species present in solution, both the reactants added to the reaction mixture and the complex species formed from them ... Denoting the reactants by A, B.. ... coefficients that relate the particular combination of reactants forming them When using general-purpose computer programs, it is usual to use cumulative, association constants, as shown above ...
Diffusion-controlled Reaction
... that occur so quickly that the reaction rate is the rate of transport of the reactants through the reaction medium (usually a solution) ... As quickly as the reactants encounter each other, they react ... chemical reaction can be considered as involving the diffusion of reactants until they encounter each other in the right stoichiometry and form an activated complex ...
Mass Excess - Example
... The mass excess of the reactant is u, and the mass excess of the products is The difference between reactants and products is u, which shows that the mass excess of the ...
Stereospecificity
... that leads to different stereoisomeric reaction products from different stereoisomeric reactants, or which operates on only one (or a subset) of the stereoisomers ... In contrast, stereoselectivity is the property of a reactant mixture where a non-stereospecific mechanism allows for the formation of multiple products, but where one (or a subset) of the products is ... specifies the stereochemical outcome of a given reactant, whereas a stereoselective reaction selects products from those made available by the same, non-specific ...