as substrates (wheat bran, exploded sugarcane bagasse,
sugarcane bagasse, sugarcane bagasse and wheat bran (1:1),
soybean bran, orange peel and orange peel and wheat bran
(1:1)). The effect of the carbon source on the enzymatic
production was evaluated in terms of cellulase and xylanase
activities. Cellulase is a complex of enzymes that contains: (1)
endoglucanases (EG) which cleave internal bonds in the
amorphous regions of the cellulose chains, (2) cellobiohydrolases
(CBH) which act on the ends of the chains liberating
cellobiose moieties, and (3) b-glucosidases which hydrolyze
cellobiose to glucose [28]. Xylan is the principal type of hemicelluloses
and represents a vast resource that can be used to
produce fermentable sugars and fuels. The complete cleavage
of xylan is carried out by the synergistic action of b-xylanase
and its accessory enzymes, including b-xylosidase, a-arabinofuranosidase,
a-glucuronidase and acetyl xylan esterase [29].
The enzyme production profile of endoglucanase, FPase, bglucosidase
and xylanase activities obtained during 120 h of
fermentation were carried out and are presented as follows