amylase assay?

[Penguin]

hbkg at hitel.kol.co.kr wrote:
> 
> We isolated some strain which produces amylase. Amylase activity
> was demonstrated by KI + I2 methods to be strong.
> But supernatants containing amylase does not show any activities
> by DNS methods. Does LB components inhibit DNS binding to degrades
> starch? We are not still sure what microorganism it is.

DNS methods?  Is this a common amylase assay?  Maybe a reducing end
assay?

Penguin