Microbiological media ingredients

chemical compound

food

pharmaceutical drug

culture medium used in microbiology

Aesculin, also called æsculin or esculin, is a coumarin glucoside that naturally occurs in the trees horse chestnut (Aesculus hippocastanum), California buckeye (Aesculus californica), and prickly box (Bursaria spinosa). It is also found in daphnin (the dark green resin of Daphne mezereum), dandelion coffee, and olive bark. It is reported to be present in olive bark, but not in olive leaf; therefore, identification of aesculin in abundance in an olive extract indicates that the extract has been derived from olive bark.

thumb|right|180px|An agar plate containing tryptone supporting growth of a micro-organism. Tryptone is the assortment of peptides formed by the digestion of casein by the protease trypsin.