Moisture, total nitrogen and ash contents of chitosan
samples were then determined (Shahidi & Synowiecki,
1991). Apparent viscosity (at 2 Nm2
) of a 1% (w/v)
chitosan in a 1% (v/v) acetic acid solution at 25 C was
measured in triplicate using a rotational viscometer
(Cole-Parmer Co. Vernon Hills, IL) equipped with a
No. 5 spindle at 50 rpm and values reported in centipoise
(cP) units.