Characterisation and enzymatic hydrolysis of nettle (Urtica dioica L) deproteinated biomass
1993
De Leo, P. | Miceli, A. | Antonaci, C. | Vigna, G.
Non-starch polysaccharides (NSP) were obtained from deproteinated nettle biomass and characterised for pectin, hemicellulose and cellulose content. The nettle deproteinated biomass (NDB) represents 52.4% (w/w) of the dry nettle biomass and contains 695.5 g kg-1 NSP. The pectin, hemicellulose and cellulose amounts are 196.7, 334.5 and 128.5 g kg-1, respectively. The high content of pectins and hemicelluloses may make the NDB an important source of dietary fibre. The NSP were hydrolysed by crude enzymatic preparations and both their biodegradability and the amount of simple sugars released have been determined. In the best conditions more than 40% of the NSP were hydrolysed with a considerable increase of sugars. These enzymatic treatments could be used to improve the feed digestibility of the biomass or to obtain bioenergetic compounds by fermentation of the hydrolysed sugars.
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