The cut cubes of nata (1 cm) were frozen in a deep freeze at
40 C for 16e18 h and freeze dried in a Scanvac freeze drier
(Scanlaf, Lynge, Denmark) at a condenser temperature of 108 C.
The freeze dried nata or bacterial cellulose was powdered in a mill
and sieved to a mesh size of 500 microns.