Definitions for "Substrates"
(1) A chemical species of particular interest, the reaction of which with some other chemical reagent is under observation (e.g. a compound that is transformed under the influence of a catalyst). (2) The chemical entity whose conversion to a product or products is catalyzed by an enzymes. (3) A solution or dry mixture containing all ingredients which are necessary for the growth of a microbial culture or for product formation. (4) A component in the nutrient medium, supplying the organisms with carbon (C-substrate), nitrogen (N-substrate) etc.
Components of a medium used by the microbes for growth and also the chemicals used by enzymes for their action.
The compound in a chemical reaction, which is transformed. In an enzymic reaction, the substance on which the enzyme acts.
Keywords:  grows, attached, animal, plant, surface
a surface on which a plant or animal grows or is attached.