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bleached fibers were delignified using 10 % NaOH for 2 hours at room temperature . The RSM psychoanalysis resulted in optimal bleaching conditions at a concentration of 3 % NaClO ( 2 ) for 1 hour , bearing OPEFB 's cellulose of 82 % ± 2 , hemicellulose of 9 % ± 2 , and lignin of 1 % ± 0 . The validation and verification process in the bleaching conditions holded cellulose of 84 % and α-cellulose of 88 % , with a crysta
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