White button mushroom, Agaricus bisporus of irregular shape and dimensions considered as wastes were donated
from Neelamalai mushroom farm, Ooty, Tamilnadu, India. Whole fruit bodies were harvested in the closed cap
stage with a cap diameter 30±5 mm and transported to the laboratory within one hour after harvest and stalks were
separated from the caps, packed in paper bags, air dried, ground to a powder and stored in a dessicator at room
temperature for further analyses and extraction.