¹reatments. The mushrooms were soaked for 10 min in
a chilled aqueous solution (4 3C) of 40 g/L citric acid, or
50 mL/L hydrogen peroxide (i.e. 167 mL of a 30% [w/w]
hydrogen peroxide solution, with 833 mL water), or distilled
water (control), and then placed on absorbent paper
for 2 min to remove excess surface liquid. They were
sliced (3 mm wide) in a food processor (Braun model
4262), then spread on absorbent paper. The slices
(60 g/tray) were packed in polystyrene plastic food trays,
of internal dimensions 19.5]10.5]2.5 cm, and overwrapped
with perforated polyvinylchloride "lm (XSC
MPF Filmco; transmission data for PVC "lm: 16000 and
90000 cc/m2/24 h for oxygen and carbon dioxide, respectively,
and 340 g/m2/24 h for water vapour), then stored
at 4 3C.