Standard methods of analysis (AOAC, 2000) were used to determine crude protein (Official Method No. 950.36), fat (Official Method No. 935.38), cellulose (Official Method No. 950.37), ash (Official Method No. 930.22) and moisture contents (Official Method
No. 926.5).
In the protein determination, a nitrogen-to-protein conversion factor of 6.25 was used. Total carbohydrate content was calculated as a sum of reducing sugar and starch contents
determined by the AOAC Official Method No. 975.14 and ICC Standard
No. 123/1 (1994), respectively.